JPH09159042A - Insulation valve - Google Patents

Insulation valve

Info

Publication number
JPH09159042A
JPH09159042A JP7320227A JP32022795A JPH09159042A JP H09159042 A JPH09159042 A JP H09159042A JP 7320227 A JP7320227 A JP 7320227A JP 32022795 A JP32022795 A JP 32022795A JP H09159042 A JPH09159042 A JP H09159042A
Authority
JP
Japan
Prior art keywords
insulating
core
mounting
flange
synthetic resin
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.)
Pending
Application number
JP7320227A
Other languages
Japanese (ja)
Inventor
Sakae Haruna
栄 春名
Tsutomu Ubagai
勉 祖母井
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical Co 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
Application filed by Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP7320227A priority Critical patent/JPH09159042A/en
Publication of JPH09159042A publication Critical patent/JPH09159042A/en
Pending legal-status Critical Current

Links

Landscapes

  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Valve Housings (AREA)
  • Sliding Valves (AREA)

Abstract

PROBLEM TO BE SOLVED: To completely prevent corrosion due to contact between different kinds of metals by providing a cylindrical core to be inserted into a mounting hole and a mounting flange in an insulating flange part of an insulation valve, forming an external thread of insulating synthetic resin in a part of the core outer circumferential face, and applying an insulating lining on the core inner circumferential face and in the mounting port facing part. SOLUTION: An insulating flange part 6 is constructed of an approximately cylindrical core 8 and a disk type mounting flange 9, and on the flange 9 side outer circumferential face of the core 8, an external thread 10 is formed of an insulating synthetic resin. An insulating lining 11 applied to the inside face of the core 8 and to the end part of the core 8 facing the depth end part, of a mounting hole 5 is constructed by fixing an insulating synthetic resin 15 in a fixing recess-projection part 14. In an insulation valve 1, a seal ring 17 is inserted into a corner part 16, and after an epoxy resin group adhesive member 19 is applied to the tip part of the core 8 or to the inner circumferential face of the comer part 16, the core 8 is inserted into the mounting hole 5, and then, the insulating synthetic resin external thread 10 is screwed to an internal thread 7 in the mounting hole 5.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、バルブ本体を構成する
金属材と異なる自然電位を有する金属管を接続するのに
有用な絶縁バルブに関し、特にフランジやユニオンにて
接合するようにしたものに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulating valve useful for connecting a metal tube having a natural electric potential different from that of a metal material forming a valve body, and more particularly to an insulating valve joined by a flange or a union. .

【0002】[0002]

【従来の技術】従来、給水配管には、内部に錆が発生し
て赤水が発生しないように内面を樹脂ライニングしたラ
イニング鋼管が使用されている。このようなライニング
鋼管を使用した給水配管途中を連結する管継手としては
例えば実開昭58−76889号公報に示すように電気
的に絶縁したものがあり、また給水配管途中に設けられ
る絶縁バルブとしては、特開平2−134479号公報
に開示されているような絶縁バルブがある。
2. Description of the Related Art Conventionally, as a water supply pipe, a lining steel pipe having an inner surface lined with a resin so as to prevent rust and red water from being generated inside is used. As a pipe joint for connecting the middle of the water supply pipe using such a lining steel pipe, for example, there is an electrically insulated pipe joint as shown in Japanese Utility Model Laid-Open No. 58-76889, and as an insulating valve provided in the middle of the water supply pipe. There is an insulating valve as disclosed in Japanese Patent Laid-Open No. 2-134479.

【0003】上記特開平2−134479号公報に記載
の絶縁バルブは、図3に示すように、両側に受口101
を有するバルブ100であって、受口101の内周面に
設けられた雌ねじ部102にライニング鋼管103の端
部外周面に設けられた雄ねじ部104を螺合させること
で、ライニング鋼管103が接続されるとともに、雌ね
じ部102に対面するように筒状の樹脂コア105が設
けられていて、ライニング鋼管103が接続されると同
時にこの樹脂コア105がライニング鋼管103の内周
面に密着し、ライニング鋼管103の管端に露出した鋼
管部106が配管中を流れる湯や水に曝されて錆が発生
しないようにしている。
The insulating valve described in Japanese Patent Laid-Open No. 2-134479, as shown in FIG.
The lining steel pipe 103 is connected by screwing the male screw portion 104 provided on the outer peripheral surface of the end of the lining steel pipe 103 into the female screw portion 102 provided on the inner peripheral surface of the receiving port 101. At the same time, a cylindrical resin core 105 is provided so as to face the female threaded portion 102, and at the same time when the lining steel pipe 103 is connected, the resin core 105 closely adheres to the inner peripheral surface of the lining steel pipe 103, The steel pipe portion 106 exposed at the pipe end of the steel pipe 103 is prevented from being exposed to hot water or water flowing in the pipe to cause rust.

【0004】[0004]

【発明が解決しようとする課題】ところで、給水配管か
ら給水された水を加熱して供給する給湯器などの給湯ラ
インには、耐蝕性を備えた銅合金やステンレス製のバル
ブを用いて接続されていることが多い。しかし、たと
え、上記のようなバルブ100を用いて、ライニング鋼
管103の管端の鋼管部106が樹脂コア105によっ
て配管中を流れる湯や水に曝されないようにしても、バ
ルブを構成する銅合金や銅と、鋼管とは、自然電位が異
なるため、長期間使用していると、鋼管103とバルブ
100とのねじ接続部で自然電位の差による電位差腐食
が発生し、ねじが無くなって鋼管103が抜けてしまう
と言う問題がある。
By the way, a hot water supply line such as a water heater for heating and supplying water supplied from a water supply pipe is connected using a valve made of a corrosion-resistant copper alloy or stainless steel. Often. However, even if the valve 100 as described above is used and the steel pipe portion 106 at the pipe end of the lining steel pipe 103 is not exposed to the hot water or water flowing in the pipe by the resin core 105, the copper alloy forming the valve Since copper and steel have different natural potentials from each other, when used for a long period of time, potential difference corrosion occurs due to the difference in natural potential at the screw connection portion between the steel pipe 103 and the valve 100, and the screws disappear and the steel pipe 103 disappears. There is a problem that is missing.

【0005】そこで、このような問題を解決するため
に、例えば前記実開昭58−76889号公報の絶縁管
継手と同様の構造のものをバルブと鋼管との間に介在さ
せる方法も一部では実施されているが、この方法の場
合、絶縁継手を別途用意しなければならないとともに、
バルブと絶縁継手とを接続する工程が余分に必要なた
め、作業性が非常に悪い。
Therefore, in order to solve such a problem, for example, a method in which a valve having a structure similar to that of the insulating pipe joint disclosed in Japanese Utility Model Laid-Open No. 58-76889 is interposed between the valve and the steel pipe is partly used. Although implemented, in the case of this method, an insulating joint must be prepared separately, and
Workability is extremely poor because an extra step is required to connect the valve and the insulating joint.

【0006】上記問題は異種金属配管をねじ嵌合により
接続する場合であるが、異種金属配管をフランジやユニ
オンにて直接接続する場合にも同様の問題が生じてしま
うのである。本発明は上記問題点に鑑み提案されたもの
で、異種金属配管をフランジやユニオンにて直接接続し
ても、異種金属接触による腐食を完全に防止することが
できるとともに、製造作業工程が簡易で製造コストも低
減できる絶縁バルブ及びその製造方法を提供できるよう
にすることを目的としている。
The above problem is a case where the dissimilar metal pipes are connected by screw fitting, but the same problem also occurs when the dissimilar metal pipes are directly connected by a flange or a union. The present invention has been proposed in view of the above problems, and even when the dissimilar metal pipes are directly connected by a flange or a union, it is possible to completely prevent corrosion due to dissimilar metal contact, and to simplify the manufacturing work process. An object of the present invention is to provide an insulating valve and a manufacturing method thereof that can reduce manufacturing cost.

【0007】[0007]

【課題を解決するための手段】このような目的を達成す
るために、請求項1記載の発明(以下、「第1発明」と
記す)にかかる絶縁バルブは、少なくとも先端の外周面
または内周面に取付け用ねじ部が形成された取付け口を
有する金属製バルブ本体と、取付け口のねじ部に螺締さ
れる絶縁フランジ部とからなり、絶縁フランジ部は取付
け口に挿入される筒状のコアと、このコアから連出した
取付けフランジとを備え、コアの外周面のすくなくとも
一部にバルブ本体の取付け口のねじ部に螺合する雄ねじ
を絶縁性合成樹脂で形成するとともに、コアの内面及び
取付け口に対面する部分に絶縁性ライニングを施した構
成とした。
In order to achieve such an object, an insulation valve according to the invention of claim 1 (hereinafter referred to as "first invention") is at least an outer peripheral surface or an inner peripheral surface of a tip. It consists of a metal valve body having a mounting port with a mounting screw part formed on its surface, and an insulating flange part that is screwed into the mounting port thread part, and the insulating flange part is a tubular shape that is inserted into the mounting port. A core and a mounting flange that extends from this core are provided, and at least a part of the outer peripheral surface of the core is formed with an insulating synthetic resin to form a male screw that engages with the threaded portion of the valve body mounting port. Also, an insulating lining is applied to the portion facing the mounting port.

【0008】また、請求項2記載の発明「以下、「第2
発明」と記す)にかかる絶縁バルブは、少なくとも先端
の外周面または内周面に取付け用ねじ部が形成された取
付け口を有する金属製バルブ本体と、取付け口のねじ部
に螺締される絶縁ユニオンとからなり、絶縁ユニオンは
取付け口に挿入される筒状のコアと、このコアから連出
した取付けフランジと、該取付けフランジの周面に形成
されたユニオンねじと、ユニオンねじに螺合するユニオ
ンナット及びユニオンナットで取付けフランジ側に押圧
される連結フランジを備え、筒状のコアの外周面のすく
なくとも一部にバルブ本体の取付け口のねじ部に螺合す
る雄ねじを絶縁性合成樹脂で形成するとともに、コアの
内面及び取付け口に対面する部分に絶縁性ライニングを
施した構成とした。
The invention according to claim 2 "hereinafter, referred to as" second
Insulation valve according to the invention "is a metal valve body having a mounting port formed with a mounting screw portion on at least the outer peripheral surface or the inner peripheral surface of the tip, and an insulating valve screwed to the screw portion of the mounting port. The insulating union is a cylindrical core that is inserted into the mounting port, a mounting flange that extends from this core, a union screw formed on the peripheral surface of the mounting flange, and is screwed to the union screw. Equipped with a union nut and a connecting flange that is pressed to the mounting flange side by the union nut, a male screw that is screwed into the threaded portion of the valve body mounting port is formed of insulating synthetic resin on at least part of the outer peripheral surface of the tubular core. In addition, the inner surface of the core and the portion facing the mounting port are provided with an insulating lining.

【0009】上記第1発明及び第2発明の構成におい
て、バルブ本体を構成する金属としては、特に限定され
ないが、ステンレス鋼、鉄、銅、砲金、青銅等が挙げら
れる。またバルブの種類としては、ボールバルブ、ゲー
トバルブ、チャッキ弁、ストレーナー、減圧弁等が挙げ
られる。絶縁性ライニングを形成する合成樹脂として
は、出来るだけ高強度なものが好ましく、特に限定され
ないが、給湯器に配管のように耐熱性を必要とすにもる
ではポリフェニレンサルファイド、ポリアミド、変性ポ
リフェニレンオキサイド、ポリイミド、ポリエーテルイ
ミド、あるいはそれらのガラス繊維補強品などの熱可塑
性樹脂(FRP)、エポキシ・フェノール等の熱硬化性
樹脂が挙げられ、耐熱性が要求されないような場合には
樹脂選択の幅がさらに広がり、上記樹脂に加えてポリ塩
化ビニル、ポリエチレン、架橋ポリエチレン、ポリプロ
ピレン等が挙げられる。
In the structures of the first and second inventions described above, the metal constituting the valve body is not particularly limited, but examples thereof include stainless steel, iron, copper, gun metal, bronze and the like. The types of valves include ball valves, gate valves, check valves, strainers, pressure reducing valves, and the like. The synthetic resin forming the insulating lining is preferably as strong as possible and is not particularly limited, but if heat resistance is required such as piping in a water heater, polyphenylene sulfide, polyamide, modified polyphenylene oxide Examples include thermoplastic resins (FRP) such as polyimide, polyether imide, or glass fiber reinforced products thereof, and thermosetting resins such as epoxy / phenol. When heat resistance is not required, there is a wide range of resin selection. In addition to the above resins, polyvinyl chloride, polyethylene, crosslinked polyethylene, polypropylene and the like can be mentioned.

【0010】筒状のコア構成する金属としては、特に限
定されないが、ステンレス鋼、鉄、銅、砲金、青銅等が
挙げられる。接着剤としては、特に限定されないが、た
とえば、エポキシ樹脂系の接着剤等が挙げられる。
The metal constituting the tubular core is not particularly limited, and examples thereof include stainless steel, iron, copper, gun metal, bronze and the like. The adhesive is not particularly limited, and examples thereof include an epoxy resin adhesive.

【0011】[0011]

【発明の実施の形態】以下に、本発明にかかる実施の形
態を、図面を参照しつつ詳しく説明する。図1は本発明
にかかる絶縁バルブの第1実施の形態をあらわす縦断側
面図であって、このバルブ1は、ゲートバルブであっ
て、操作摘み2の回動操作で昇降操作されるゲート弁体
3と、このゲート弁体3を昇降可能に収納するように青
銅鋳物で形成されたバルブ本体4と、ゲート弁体3の側
方に形成された筒状の取付け口5に装着される絶縁フラ
ンジ部6とからなる。
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a vertical cross-sectional side view showing a first embodiment of an insulation valve according to the present invention. This valve 1 is a gate valve, and a gate valve body that is operated up and down by a turning operation of an operating knob 2. 3, a valve body 4 made of bronze casting for accommodating the gate valve body 3 so that the gate valve body 3 can be moved up and down, and an insulating flange attached to a cylindrical mounting port 5 formed on the side of the gate valve body 3. And part 6.

【0012】上記取付け口5は、ゲート弁体3の側方に
筒状に形成され、その内周面部分には雌ねじ(取付け用
ねじ部)7が刻設されている。この取付け口5に装着さ
れる絶縁フランジ部6は、バルブ本体4と同様の素材で
略筒状に形成されたコア8と、このコア8から一体に形
成した円板状の取付けフランジ9とからなり、コア8の
取付けフランジ9側部分の外周面には絶縁性合成樹脂で
形成された雄ねじ(ネジ部)10が形成されている。
The mounting port 5 is formed in a tubular shape on the side of the gate valve body 3, and an internal thread (mounting screw portion) 7 is engraved on the inner peripheral surface portion thereof. The insulating flange portion 6 attached to the mounting port 5 includes a core 8 formed of a material similar to that of the valve body 4 and having a substantially tubular shape, and a disc-shaped mounting flange 9 integrally formed from the core 8. Therefore, a male screw (screw portion) 10 made of an insulating synthetic resin is formed on the outer peripheral surface of the mounting flange 9 side portion of the core 8.

【0013】この絶縁性合成樹脂製の雄ねじ10は、コ
ア8の取付けフランジ9側部分の外周面にローレット加
工を施して回り止め用凹凸11を形成し、この回り止め
用凹凸11で固定された合成樹脂層12を取付け口5と
略同径に形成した後、この合成樹脂層12の表面に取付
け口5の雌ねじ7に螺合する雄ねじ10を刻設したもの
である。
The male screw 10 made of insulating synthetic resin is knurled on the outer peripheral surface of the core 8 on the side of the mounting flange 9 to form a rotation-preventing concavo-convex portion 11, which is fixed by the rotation-preventing concavo-convex portion 11. The synthetic resin layer 12 is formed to have substantially the same diameter as the mounting port 5, and then a male screw 10 that is screwed into the female screw 7 of the mounting port 5 is engraved on the surface of the synthetic resin layer 12.

【0014】また、筒状のコア の内面及び取付け口5
の奥端部に対面するコア8の端部に亙って施される絶縁
性ライニング13は、コア8の内面及び取付け口5に対
面する端部にローレット加工等により固定用凹凸14を
形成し、当該部分に射出成形により形成された絶縁性を
有する合成樹脂層15を前記固定用凹凸14部分で固定
して構成したものである。
The inner surface of the cylindrical core and the mounting port 5
The insulating lining 13 provided over the end portion of the core 8 facing the innermost end portion of the core 8 is provided with the fixing unevenness 14 by knurling or the like on the inner surface of the core 8 and the end portion facing the mounting port 5. The synthetic resin layer 15 having an insulating property formed by injection molding on the portion is fixed by the fixing unevenness 14 portion.

【0015】そして、筒状のコア8先端周縁部分には、
これを収納する取付け口5の奥端のコーナー部分16と
の間を封止するためのシールリング(Oーリング)17
の当接面18が形成されている。上記のように構成され
た絶縁バルブ1は、先ず、取付け口5の奥端のコーナー
部分16にシールリング17を挿入し、コア8の先端部
分または取付け口5のコーナー部分16の内周面部分に
エポキシ樹脂系の接着材19を塗布してからコア8を取
付け口5に挿入し、絶縁性合成樹脂製の雄ねじ10を取
付け口5の雌ねじ7に確りと螺締する。
Then, in the peripheral portion of the tip of the tubular core 8,
A seal ring (O-ring) 17 for sealing a space between the corner portion 16 at the rear end of the mounting opening 5 for storing this
A contact surface 18 is formed. In the insulation valve 1 configured as described above, first, the seal ring 17 is inserted into the corner portion 16 at the rear end of the mounting opening 5, and the tip portion of the core 8 or the inner peripheral surface portion of the corner portion 16 of the mounting opening 5 is inserted. After the epoxy resin adhesive 19 is applied to the core 8, the core 8 is inserted into the mounting port 5, and the male screw 10 made of insulating synthetic resin is securely screwed into the female screw 7 of the mounting port 5.

【0016】すると、コア8とバルブ本体4とは絶縁性
合成樹脂製の雄ねじ10、接着材19、シールリング1
7及び絶縁性ライニング13で絶縁される。しかして取
付け口5に絶縁フランジ部6が設けられた絶縁バルブ1
が形成されるのである。そして、この絶縁フランジ部6
の取付けフランジ9にライニング鋼管20の管端部に形
成されたフランジ21をボルト22等により連結した場
合、前記取付けフランジ9とバルブ本体4との間が絶縁
されていることから、異種金属配管による異種金属接触
腐食を完全に防止することができるのである。
Then, the core 8 and the valve body 4 are connected to each other by a male screw 10 made of an insulating synthetic resin, an adhesive 19, and a seal ring 1.
It is insulated by 7 and the insulating lining 13. Therefore, the insulation valve 1 having the mounting flange 5 provided on the mounting opening 5
Is formed. And this insulating flange portion 6
When the flange 21 formed at the pipe end portion of the lining steel pipe 20 is connected to the mounting flange 9 of No. 2 by a bolt 22 or the like, since the mounting flange 9 and the valve main body 4 are insulated from each other, a different metal pipe is used. Corrosion of dissimilar metals can be completely prevented.

【0017】次に、絶縁バルブの第2の実施の形態を図
2に基づいて説明する。図2は、第2の実施の形態にか
かる絶縁バルブ1の縦断側面図であって、上記第1の実
施の形態で示した絶縁バルブ1と異なるのは、筒状の取
付け口5に装着される絶縁フランジ部6を絶縁ユニオン
26にした点である。この絶縁ユニオン26は取付け口
5に挿入される筒状のコア27と、このコア27から連
出した取付けフランジ28と、該取付けフランジ28の
周面に形成されたユニオンねじ29と、ユニオンねじ2
9に螺合するユニオンナット30及びユニオンナット3
0でパッキン31を介在させた状態で取付けフランジ2
8側に押圧される連結フランジ32とを備え、連結フラ
ンジ32の内面には連結用雌ねじ33が形成された一般
的なユニオンと略同様の構造になっているが、筒状のコ
ア27とこれが取り付けられるバルブ本体4との間を絶
縁した点及び連結フランジ32の内方に絶縁用スリーブ
34を設けた点が一般的なユニオンとは異なる。
Next, a second embodiment of the insulation valve will be described with reference to FIG. FIG. 2 is a vertical cross-sectional side view of the insulation valve 1 according to the second embodiment. What is different from the insulation valve 1 shown in the first embodiment is that it is attached to a cylindrical mounting port 5. This is the point that the insulating flange portion 6 is replaced with the insulating union 26. The insulating union 26 has a tubular core 27 inserted into the mounting port 5, a mounting flange 28 extending from the core 27, a union screw 29 formed on the peripheral surface of the mounting flange 28, and the union screw 2
Union nut 30 and union nut 3 screwed to 9
Mounting flange 2 with packing 31 at 0
8 has a connecting flange 32 that is pressed toward the 8 side, and has a structure similar to a general union in which the connecting internal thread 33 is formed on the inner surface of the connecting flange 32. It differs from a general union in that it is insulated from the valve body 4 to be attached and that an insulating sleeve 34 is provided inside the connecting flange 32.

【0018】即ち、筒状のコア27とバルブ本体4との
間を絶縁する構造は、上記第1の実施の形態と同様に、
バルブ本体4の取付け口5の雌ねじ7に対面するコア部
分27を小径に形成し、その周面にローレットやセレー
ションを施して形成された回り止め用凹凸部11に絶縁
性合成樹脂層12を形成して固定し、当該合成樹脂層1
2の表面に取付け口5の雌ねじ7に嵌合する雄ねじ10
を形成するとともに、パッキン31に対面する部分から
コア27の内周面及び取付け口5の奥端部にいたる間に
合成樹脂層(絶縁性ライニング13)15を形成したも
ので、この場合の絶縁性合成樹脂層15もコア27に形
成されたローレットやセレーションによる固定用凹凸1
4で固定するのが望ましい。
That is, the structure that insulates between the cylindrical core 27 and the valve body 4 is the same as in the first embodiment.
A core portion 27 facing the female screw 7 of the mounting port 5 of the valve body 4 is formed to have a small diameter, and an insulating synthetic resin layer 12 is formed on a rotation preventing uneven portion 11 formed by knurling or serration on the peripheral surface thereof. Then, the synthetic resin layer 1 is fixed.
A male screw 10 which is fitted to the female screw 7 of the mounting port 5 on the surface of 2.
And a synthetic resin layer (insulating lining 13) 15 is formed between the portion facing the packing 31 and the inner peripheral surface of the core 27 and the rear end of the mounting opening 5. Of the synthetic resin layer 15 also formed on the core 27 by knurling or serrations for fixing 1
It is desirable to fix at 4.

【0019】また、連結フランジ32の内面に設けられ
る絶縁用スリーブ34は、取付けフランジ28側端部に
固定された絶縁性合成樹脂で基部36からライニング鋼
管20内に嵌合する筒部37を一体に形成したものであ
る。こうしたものではバルブ本体4の取付け口5にコア
27を螺着して取付ける一方、連結フランジ32をライ
ニング鋼管20の管端部分に螺着すると、絶縁用スリー
ブ34の外周面部分がライニング鋼管20内のライニン
グ38に当接し、この連結フランジ32をユニオンナッ
ト30でパッキン31を介して取付けフランジ29に固
定したとき、ライニング鋼管20の管端部分を配管内を
流れる水にから隔離することができる。
The insulating sleeve 34 provided on the inner surface of the connecting flange 32 is made of an insulative synthetic resin fixed to the end portion of the mounting flange 28, and is integrally formed with a cylindrical portion 37 fitted from the base portion 36 into the lining steel pipe 20. It was formed in. In such a case, while the core 27 is screwed to the mounting port 5 of the valve body 4 and the connecting flange 32 is screwed to the pipe end portion of the lining steel pipe 20, the outer peripheral surface portion of the insulating sleeve 34 is inside the lining steel pipe 20. When the connecting flange 32 is fixed to the mounting flange 29 by the union nut 30 via the packing 31, the pipe end portion of the lining steel pipe 20 can be isolated from the water flowing in the pipe.

【0020】従って、異種金属接触による電位差腐食を
防止し、耐久性が高められるのである。尚、上記各実施
の形態ではバルブ本体4の取付け口5に雌ねじ33を形
成するようにしてあるが、これを雄ねじにし、ここに取
り付けられる絶縁フランジ部や絶縁ユニオン部分を雌ね
じにして外嵌させるようにすることができるのは勿論で
ある。
Therefore, it is possible to prevent the potential difference corrosion due to the contact between different kinds of metals and to enhance the durability. Although the female screw 33 is formed in the mounting port 5 of the valve body 4 in each of the above-described embodiments, the female screw 33 is formed as a male screw, and the insulating flange portion or the insulating union portion attached to the female screw 33 is formed as a female screw for external fitting. Of course, this can be done.

【0021】[0021]

【発明の効果】本発明にかかる絶縁バルブは、以上に説
明したように、バルブ本体の取付け口のねじ部に絶縁フ
ランジまたは絶縁ユニオンを取付け、これら絶縁フラン
ジまたは絶縁ユニオンを介して自然電位が異なる配管材
を接続する簡単な構成にしてあるので製造も安価にでき
るうえ、施工現場でも別体で形成された絶縁継手等を介
在させなくても済み、手間をかけることなく短時間に行
なえるという利点もある。
As described above, in the insulating valve according to the present invention, the insulating flange or the insulating union is attached to the thread portion of the mounting port of the valve body, and the natural potential is different through the insulating flange or the insulating union. Since it has a simple structure to connect piping materials, it can be manufactured at low cost, and it does not require an insulating joint formed separately at the construction site, and it can be done in a short time without trouble. There are also advantages.

【0022】然も、バルブ本体と自然電位が異なる配管
材をフランジまたはユニオン接続してもバルブ本体と配
管材とがフランジまたはユニオン部分で絶縁されている
ことから、異種金属接触による電位差腐食を起こすこと
がなくその耐久性も大幅に向上させることができると言
う利点もある。
Even if a pipe material having a natural potential different from that of the valve body is connected to a flange or a union, since the valve body and the pipe material are insulated by the flange or the union portion, potential difference corrosion due to contact between different metals occurs. There is also an advantage that the durability can be greatly improved without the use.

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

【図1】本発明にかかる絶縁バルブの第1の実施の形態
を表す断面図である。
FIG. 1 is a cross-sectional view showing a first embodiment of an insulation valve according to the present invention.

【図2】本発明にかかる絶縁バルブの第2の実施の形態
を表す断面図である。
FIG. 2 is a sectional view showing a second embodiment of an insulation valve according to the present invention.

【図3】従来の絶縁バルブの縦断側面図である。FIG. 3 is a vertical sectional side view of a conventional insulation valve.

【符号の説明】[Explanation of symbols]

1・・・絶縁バルブ 4・・・バルブ本体 5・・・取付け口 6・・・絶縁フランジ部 7・・・取付け雌ねじ部 8・・・コア 10・・・ねじ部 13・・・絶縁性ライニング 26・・・絶縁ユニオン 27・・・コア 28・・・取付けフランジ 29・・・ユニオンねじ 30・・・ユニオンナット 1 ... Insulation valve 4 ... Valve body 5 ... Mounting port 6 ... Insulation flange part 7 ... Mounting female screw part 8 ... Core 10 ... Screw part 13 ... Insulating lining 26 ... Insulation union 27 ... Core 28 ... Mounting flange 29 ... Union screw 30 ... Union nut

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】少なくとも先端の外周面または内周面に取
付け用ねじ部が形成された取付け口を有する金属製バル
ブ本体と、取付け口のねじ部に螺締される絶縁フランジ
部とからなり、絶縁フランジ部は取付け口に挿入される
筒状のコアと、このコアから連出した取付けフランジと
を備え、コアの外周面のすくなくとも一部にバルブ本体
の取付け口のねじ部に螺合する雄ねじを絶縁性合成樹脂
で形成するとともに、コアの内面及び取付け口に対面す
る部分に絶縁性ライニングを施したことを特徴とする絶
縁バルブ。
1. A metal valve main body having a mounting port formed with a mounting screw part on at least the outer peripheral surface or the inner peripheral surface of the tip, and an insulating flange part screwed to the screw part of the mounting port. The insulating flange has a cylindrical core that is inserted into the mounting port and a mounting flange that extends from this core. A male screw that engages with at least part of the outer peripheral surface of the core at the threaded portion of the valve body mounting port. The insulating valve is characterized in that it is made of an insulating synthetic resin, and an insulating lining is applied to a portion facing the inner surface of the core and the mounting opening.
【請求項2】少なくとも先端の外周面または内周面に取
付け用ねじ部が形成された取付け口を有する金属製バル
ブ本体と、取付け口のねじ部に螺締される絶縁ユニオン
とからなり、絶縁ユニオンは取付け口に挿入される筒状
のコアと、このコアから連出した取付けフランジと、該
取付けフランジの周面に形成されたユニオンねじと、ユ
ニオンねじに螺合するユニオンナット及びユニオンナッ
トで取付けフランジ側に押圧される連結フランジを備
え、筒状のコアの外周面のすくなくとも一部にバルブ本
体の取付け口のねじ部に螺合する雄ねじを絶縁性合成樹
脂で形成するとともに、コアの内面及び取付け口に対面
する部分に絶縁性ライニングを施したことを特徴とする
絶縁バルブ。
2. An insulating body comprising a metal valve body having a mounting opening formed with a mounting screw portion at least at an outer peripheral surface or an inner peripheral surface of the tip, and an insulating union screwed to the thread portion of the mounting opening. The union consists of a tubular core that is inserted into the mounting port, a mounting flange that extends from this core, a union screw formed on the peripheral surface of the mounting flange, and a union nut and union nut that are screwed into the union screw. It is equipped with a connecting flange that is pressed to the mounting flange side, and at least part of the outer peripheral surface of the cylindrical core is made of an insulating synthetic resin that forms a male screw that engages with the threaded portion of the valve body mounting port. And an insulating valve having an insulating lining on a portion facing the mounting port.
JP7320227A 1995-12-08 1995-12-08 Insulation valve Pending JPH09159042A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7320227A JPH09159042A (en) 1995-12-08 1995-12-08 Insulation valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7320227A JPH09159042A (en) 1995-12-08 1995-12-08 Insulation valve

Publications (1)

Publication Number Publication Date
JPH09159042A true JPH09159042A (en) 1997-06-17

Family

ID=18119152

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7320227A Pending JPH09159042A (en) 1995-12-08 1995-12-08 Insulation valve

Country Status (1)

Country Link
JP (1) JPH09159042A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005268121A (en) * 2004-03-19 2005-09-29 Osaka Gas Co Ltd Insulation washer and insulating coupling structure
JP2008111525A (en) * 2006-10-31 2008-05-15 Osaka Sanitary Kinzoku Kogyo Kyodo Kumiai Valve device and joint
JP2014066338A (en) * 2012-09-27 2014-04-17 Nichirin Co Ltd Process of manufacture of joint fitting with resin flange and joint fitting with resin flange
JP2015047472A (en) * 2013-09-05 2015-03-16 ホーチキ株式会社 Valve for fire protection facility

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005268121A (en) * 2004-03-19 2005-09-29 Osaka Gas Co Ltd Insulation washer and insulating coupling structure
JP4508688B2 (en) * 2004-03-19 2010-07-21 株式会社クリエイティブテクノソリューション Insulation connection for insulation washers and conductive piping
JP2008111525A (en) * 2006-10-31 2008-05-15 Osaka Sanitary Kinzoku Kogyo Kyodo Kumiai Valve device and joint
JP2014066338A (en) * 2012-09-27 2014-04-17 Nichirin Co Ltd Process of manufacture of joint fitting with resin flange and joint fitting with resin flange
JP2015047472A (en) * 2013-09-05 2015-03-16 ホーチキ株式会社 Valve for fire protection facility

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