JP6810418B2 - Joint structure - Google Patents
Joint structure Download PDFInfo
- Publication number
- JP6810418B2 JP6810418B2 JP2016216883A JP2016216883A JP6810418B2 JP 6810418 B2 JP6810418 B2 JP 6810418B2 JP 2016216883 A JP2016216883 A JP 2016216883A JP 2016216883 A JP2016216883 A JP 2016216883A JP 6810418 B2 JP6810418 B2 JP 6810418B2
- Authority
- JP
- Japan
- Prior art keywords
- insulating
- joint
- joint body
- annular flange
- piping member
- 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.)
- Active
Links
Landscapes
- Joints With Pressure Members (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Description
本発明は、継手構造、特に、配管相互を電気的に絶縁した状態で接続させる継手構造に関する。 The present invention relates to a joint structure, particularly a joint structure in which pipes are electrically insulated from each other.
従来より、配管同士を絶縁状態に接続させる継手構造として、図４に示すように、一方の第１配管部材(41)に接続される第１継手(4a)と、他方の第２配管部材(42)に接続される第２継手(4b)とを、ガスケット(43)及び絶縁部材(44)を介して、袋ナット(40)で接続するものが知られている（特許文献１）。ガスケット(43)及び絶縁部材(44)は、共に、セラミック、テフロン（登録商標）、ゴム等の絶縁材料からなり、絶縁部材(44)によって、第１継手(4a)と袋ナット(40)が、また、ガスケット(43)によって、第１、第２継手(4a)(4b)間が、電気的に絶縁された状態で接続されている。これにより、第１、第２配管部材(41)(42)は絶縁された状態となり、第１、第２配管部材(41)(42)が異種金属からなる場合でも、これら第１、第２配管部材(41)(42)間に、両者の電位差によって生じる迷走電流が流れることはなく、迷走電流による金属腐食の発生を防止することができる。 Conventionally, as a joint structure for connecting pipes to each other in an insulated state, as shown in FIG. 4, a first joint (4a) connected to one first pipe member (41) and a second pipe member (the other) It is known that the second joint (4b) connected to 42) is connected by a bag nut (40) via a gasket (43) and an insulating member (44) (Patent Document 1). Both the gasket (43) and the insulating member (44) are made of an insulating material such as ceramic, Teflon (registered trademark), and rubber. The insulating member (44) makes the first joint (4a) and the cap nut (40). Also, a gasket (43) connects the first and second joints (4a) and (4b) in an electrically insulated state. As a result, the first and second piping members (41) and (42) are in an insulated state, and even when the first and second piping members (41) and (42) are made of dissimilar metals, these first and second piping members (41) and (42) are in an insulated state. The stray current generated by the potential difference between the two does not flow between the piping members (41) and (42), and the occurrence of metal corrosion due to the stray current can be prevented.
しかしながら、上記従来技術のものでは、ガスケット(43)の内周側面や外周側面に、導電性の異物や継手のバリ等が付着する等して、ガスケット(43)の絶縁性能が劣化してしまうと、第１、第２継手(4a)(4b)間を通電させてしまうといった不都合がある。 However, in the above-mentioned prior art, the insulating performance of the gasket (43) deteriorates due to conductive foreign matter, burrs of the joint, etc. adhering to the inner peripheral side surface and the outer peripheral side surface of the gasket (43). In addition, there is a disadvantage that the first and second joints (4a) and (4b) are energized.
そこで、第１、第２配管部材として、ガスメータ用のガス栓本体の下流側接続筒部とガスメータのガス入口筒部を、絶縁パッキンを介して電気的に絶縁させた状態にて、１つの継手本体と袋ナットで接続させたものにおいて、絶縁パッキンの絶縁性能が損なわれても、配管部材間の絶縁を確保できるようにするために、前記継手本体の外面全域に、絶縁性能を有するエポキシ樹脂をコーティングする構成が開示されている（特許文献２）。
このものでは、万一、２つの配管部材間に設けた絶縁パッキンの絶縁性能が劣化しても、継手本体自体の外面全域が絶縁性機能を有する構成としたから、配管部材相互間の絶縁性を保持することができる。
Therefore, as the first and second piping members, one joint is provided in a state where the downstream connection cylinder portion of the gas plug main body for the gas meter and the gas inlet cylinder portion of the gas meter are electrically insulated via an insulating packing. Epoxy resin having insulation performance over the entire outer surface of the joint body so that insulation between piping members can be ensured even if the insulation performance of the insulation packing is impaired when the main body is connected with a bag nut. (Patent Document 2) is disclosed.
In this case, even if the insulation performance of the insulating packing provided between the two piping members deteriorates, the entire outer surface of the joint body itself has an insulating function. Can be retained.
しかしながら、上記構成のものでは、継手本体の外面にエポキシ樹脂を塗装しただけであるから、例えば、継手本体の外面に、ガス栓本体の下流側接続筒部や、ガスメータのガス入口筒部が擦れたりぶつかったりすると、エポキシ樹脂被膜が剥がれてしまい、絶縁性能が失われるといった不都合がある。言い換えれば、１つの継手本体の外面にエポキシ樹脂被膜をコーティングしただけでは、当該継手本体を介して接続させる２つの配管部材相互間の絶縁性を確保することは難しい。 However, in the above configuration, since the outer surface of the joint body is only coated with epoxy resin, for example, the downstream connection cylinder portion of the gas plug body and the gas inlet cylinder portion of the gas meter rub against the outer surface of the joint body. If they collide with each other, the epoxy resin film will peel off and the insulation performance will be lost. In other words, it is difficult to secure the insulating property between the two piping members connected via the joint body only by coating the outer surface of one joint body with an epoxy resin film.
本発明は、金属製の第１、第２配管部材を継手本体によって、電気的に絶縁した状態に接続させる継手構造であって、両者間に介在させる絶縁パッキンの絶縁性能が劣化したり、第１、第２配管部材間に導電性の異物が介在したり、さらには、第１、第２配管部材を継手本体によって接続する時、継手本体の外面が第１又は第２配管部材に当たったり、擦れたりしても、第１、第２配管部材間の絶縁性を十分に保持することができる継手構造を提供することを課題とする。 The present invention is a joint structure in which metal first and second piping members are connected by a joint body in an electrically insulated state, and the insulation performance of the insulating packing interposed between the two is deteriorated. Conductive foreign matter may intervene between the first and second piping members, and when the first and second piping members are connected by the joint body, the outer surface of the joint body may hit the first or second piping member. It is an object of the present invention to provide a joint structure capable of sufficiently maintaining the insulating property between the first and second piping members even if they are rubbed.
上記課題を解決するための技術的手段は、『第１配管部材に継手本体の一端が気密状態に接続され、
前記継手本体の他端近傍には、外方に張り出す環状鍔部とそれより前記他端側に延設された延設筒部が設けられると共に、前記環状鍔部の前記延設筒部側に面する一方面を、第２配管部材の接続端面に、環状パッキンを介して当接させ、
前記継手本体の外面のうち、前記環状鍔部の外側面から前記一方面の反対側に位置する他方面を経て、前記第１配管部材に至る範囲に、環状の絶縁部材を密に外嵌させ、
前記環状鍔部の前記他方面に前記絶縁部材を介して係止する係止片部と、前記第２配管部材に設けられた雄ネジ部に螺合可能な雌ネジ部を有する袋ナットが設けられ、
前記継手本体の外面のうち、少なくとも、前記環状鍔部の外側面から前記一方面に至る範囲及びそれに続く前記延設筒部の外側面からその端面に至る範囲に、セラミック溶射による絶縁被膜を形成し、
前記絶縁部材は、前記環状鍔部の外側面に前記絶縁被膜を介して被覆される大径筒部と、前記環状鍔部の前記他方面に被覆される水平面部と、前記水平面部から延設されて前記継手本体の胴部外側面から前記第１配管部材の下端部に至る範囲を連続して被覆する小径筒部と、前記第１配管部材の下端部に続く外側面を被覆する上部筒部とからなり、
前記袋ナットの締付完了時にて、前記第1配管部材の外周面から前記袋ナットの上流側端部の外周面に至る範囲を密に被覆する絶縁弾性材料製の筒状の防水カバーを設け、
前記防水カバーの筒状部内周面を前記絶縁部材の前記上部筒部外周部に対して水密状態となるように取り付けたこと』である。
The technical means for solving the above problems is "one end of the joint body is connected to the first piping member in an airtight state.
Wherein the other end near the joint body, the extended cylinder portion extending annular flange portion and the other end side than projecting outward are provided, the extended cylinder portion of the annular flange portion One surface facing the surface is brought into contact with the connection end surface of the second piping member via an annular packing.
Of the outer surface of the joint body, the annular insulating member is densely fitted to the outer surface of the annular flange portion through the other surface located on the opposite side of the one surface to the first piping member. ,
A locking piece for locking through the insulating member to the other surface of the annular flange portion, said second cap nut having a screwable female screw portion in the male threaded portion provided on the piping member is provided Be,
Of the outer surface of the joint body, formed at least in a range leading to the end face thereof from the outer surface of the extended cylinder portion from the outer surface continues scope and it leads to the one surface of the annular flange portion, the insulating coating by ceramic spray and,
The insulating member extends from the horizontal surface portion, a large-diameter tubular portion in which the outer surface of the annular flange portion is coated via the insulating coating, a horizontal surface portion covered in the other surface of the annular flange portion, and the horizontal surface portion. A small-diameter cylinder that continuously covers the range from the outer surface of the body of the joint body to the lower end of the first piping member, and an upper cylinder that covers the outer surface following the lower end of the first piping member. It consists of a department
When the tightening of the bag nut is completed, a tubular waterproof cover made of an insulating elastic material that densely covers the range from the outer peripheral surface of the first piping member to the outer peripheral surface of the upstream end of the bag nut is provided. ,
The inner peripheral surface of the tubular portion of the waterproof cover is attached so as to be watertight with respect to the outer peripheral portion of the upper tubular portion of the insulating member . ”
第１配管部材には継手本体の一端が接続され、継手本体の他端と第２配管部材とは、環状パッキン及び絶縁部材を介して、袋ナットによって接続される。すなわち、第１配管部材と継手本体との接続体と、第２配管部材と袋ナットとの接続体とは、絶縁部材及び環状パッキンを介して絶縁状態に接続される。
なお、継手本体のうち、環状パッキンを装着させている環状鍔部の前記一方面から外側面に至る範囲と、前記一方面に続く延設筒部の外側面からその端面に至る範囲には、セラミック溶射による絶縁被膜が設けられているから、前記環状パッキンや絶縁部材が設けられていない範囲に導電性の異物が付着する等し、それが第２配管部材に接することがあっても、また、環状パッキンに絶縁性能が期待できない場合でも、継手本体の外面のうち少なくとも上記範囲にセラミック溶射による絶縁被膜を設ける構成としたことにより、第１、第２配管部材は確実に絶縁された状態に保持される。これにより、第１、第２配管部材に迷走電流が流れる不都合は防止でき、迷走電流による腐食を防止することができる。
また、セラミック溶射による絶縁被膜は、溶融セラミック粒子が積層されているため、継手本体の絶縁被膜形成域に、他の部品等が当たったり、擦れたりしても、継手本体の絶縁性能が劣化することはない。
なお、前記袋ナットの締付完了時にて、前記第１配管部材の外周面から前記袋ナットの上流側端部の外周面に至る範囲を密に被覆する絶縁弾性材料製の筒状の防水カバーを設け、前記防水カバーの筒状部内周面を前記絶縁部材の上部筒部外周部に対して水密状態となるように取り付けたから、袋ナットのネジ部または袋ナットと防水カバーの当接部から防水カバーの内面側に雨水が浸入することがあっても、絶縁部材と防水カバーによって水密状態となっているため、第１配管部材への雨水の浸入が防止でき、第２配管部材と第１配管部材が袋ナットを介して導通することがない。
One end of the joint body is connected to the first piping member, and the other end of the joint body and the second piping member are connected by a bag nut via an annular packing and an insulating member. That is, the connection body between the first piping member and the joint body and the connection body between the second piping member and the bag nut are connected to each other in an insulated state via the insulating member and the annular packing.
In the joint body, the range from the one surface to the outer surface of the annular flange portion to which the annular packing is mounted and the range from the outer surface to the end surface of the extension cylinder portion following the one surface are included. Since the insulating film by ceramic spraying is provided, even if conductive foreign matter adheres to the range where the annular packing or the insulating member is not provided and it may come into contact with the second piping member, Even if the annular packing cannot be expected to have insulating performance, the first and second piping members are surely insulated by providing an insulating coating by ceramic spraying on at least the above range of the outer surface of the joint body. Be retained. As a result, the inconvenience of the stray current flowing through the first and second piping members can be prevented, and corrosion due to the stray current can be prevented.
In addition, since the insulating coating by ceramic spraying is laminated with molten ceramic particles, the insulating performance of the joint body deteriorates even if other parts or the like hit or rub against the insulating coating forming area of the joint body. There is no such thing.
When the tightening of the bag nut is completed, a tubular waterproof cover made of an insulating elastic material that densely covers the range from the outer peripheral surface of the first piping member to the outer peripheral surface of the upstream end of the bag nut. Was attached so that the inner peripheral surface of the tubular portion of the waterproof cover was watertight with respect to the outer peripheral portion of the upper tubular portion of the insulating member. Therefore, from the screw portion of the bag nut or the contact portion between the bag nut and the waterproof cover. Even if rainwater may enter the inner surface of the waterproof cover, the insulating member and the waterproof cover make it watertight, so that rainwater can be prevented from entering the first piping member, and the second piping member and the first The piping member does not conduct through the cap nut.
上記継手構造において、好ましくは、『前記袋ナットの係止片部と前記絶縁部材との間に、リング体を介在させた』ことである。
袋ナットを締め付けて行くと、袋ナットが降下することにより、係止片部が環状鍔部の前記他方面を絶縁部材を介して押圧するが、係止片部と絶縁部材との間にリング体を介在させておくことによって、係止片部の押圧による絶縁部材の損傷を防止することができる。
In the joint structure, it is preferable that "a ring body is interposed between the locking piece of the bag nut and the insulating member".
As the bag nut is tightened, the bag nut descends, so that the locking piece presses the other surface of the annular collar portion via the insulating member, and a ring is formed between the locking piece and the insulating member. By interposing the body, it is possible to prevent damage to the insulating member due to pressing of the locking piece.
上記継手構造において、好ましくは、『継手本体の外面全域に、セラミック溶射による絶縁被膜を形成したこと』である。
これにより、第１、第２配管部材間の絶縁性能を一層確保することができる。
In the above joint structure, it is preferable that "an insulating film is formed by thermal spraying on the entire outer surface of the joint body".
As a result, the insulation performance between the first and second piping members can be further ensured.
上記継手構造において、好ましくは、『前記継手本体と絶縁部材とは、絶縁性の接着剤やシ−ル剤を介して水密状態に接する構成とした』ものでは、継手本体の外面は一層確実に防水状態に保持されるから、袋ナット内に雨水が浸入しても長期的に第１配管部材と第２配管部材が袋ナットを介して導通することがない。 In the above-mentioned joint structure, preferably, in the case where "the joint body and the insulating member are in contact with each other in a watertight state through an insulating adhesive or a sealant", the outer surface of the joint body is more reliably formed. Since it is maintained in a waterproof state, even if rainwater enters the bag nut, the first piping member and the second piping member do not conduct with each other via the bag nut for a long period of time.
上記継手構造において、好ましくは、『前記第１配管部材は、メータ用ガス栓の下流側接続筒部とし、
前記第２配管部材は、ガスメータのガス入口筒部とし、
前記袋ナットの締付完了時にて、前記メータ用ガス栓の下流側接続筒部の外側面から前記袋ナットの係止片部の上面に至る範囲を密に被覆するように、絶縁弾性材料からなる防水カバーを設けた』ことである。
メータ用ガス栓の下流側接続筒部と、ガスメータのガス入口筒部とが、継手本体及び袋ナットによって絶縁状態に接続され、袋ナットの雌ネジ部をガスメータのガス入口筒部の雄ネジ部へ最終締付状態に至るまで締付けた締付完了時にて、メータ用ガス栓の下流側接続筒部の外側面の所定位置から袋ナットの係止片部の外側面に至る範囲に防水カバーが被覆された態様となる。防水カバーによって、絶縁部材と袋ナット内は、防水・防塵された状態にシールされるから、絶縁部材及び袋ナット内は雨水、塵埃、塗料、光等の外的衝撃や刺激から保護されることとなり、絶縁部材や環状パッキン等の絶縁性能の劣化を防止することができる。これにより、ガス栓本体とガスメータとの間に迷走電流が流れることはなく、前記迷走電流によるガス栓本体やこれに続くガス引き込み用配管における腐食を防止することができる。
In the joint structure, preferably, "the first piping member is a connecting cylinder portion on the downstream side of the gas plug for a meter.
The second piping member is a gas inlet cylinder of a gas meter.
When the tightening of the bag nut is completed, the insulating elastic material is used so as to densely cover the range from the outer surface of the downstream connecting cylinder portion of the meter gas plug to the upper surface of the locking piece portion of the bag nut. A waterproof cover is provided. "
The downstream connection tube of the gas meter plug and the gas inlet tube of the gas meter are connected in an insulated state by the joint body and the bag nut, and the female thread of the bag nut is the male thread of the gas inlet tube of the gas meter. When the tightening is completed until the final tightening state is completed, the waterproof cover extends from the predetermined position on the outer surface of the downstream connection cylinder of the meter gas plug to the outer surface of the locking piece of the bag nut. It becomes a covered aspect. Since the insulating member and the inside of the bag nut are sealed in a waterproof and dustproof state by the waterproof cover, the inside of the insulating member and the bag nut should be protected from external impacts and stimuli such as rainwater, dust, paint and light. Therefore, it is possible to prevent deterioration of the insulation performance of the insulating member, the annular packing, and the like. As a result, a stray current does not flow between the gas plug main body and the gas meter, and corrosion of the gas plug main body and the subsequent gas drawing pipe due to the stray current can be prevented.
本発明は、上記構成であるから次の特有の効果を有する。
本願発明によれば、第１、第２配管部材間に設ける環状パッキンの絶縁性が弱かったり、第１、第２配管部材間に導電性の異物が付着したりすることがあっても、継手本体の外面のうち、少なくとも、環状パッキンを介して第２配管部材と対向する箇所には、セラミック溶射による絶縁被膜が形成されているから、継手本体と第２配管部材との絶縁性は確実に維持されることとなり、これにより、第１、第２配管部材間の絶縁性も維持される。
セラミック溶射による絶縁被膜は、コーティングによる被膜と比べて、外力により破れたり剥がれたりすることがないので、取付作業中等に、前記継手本体の外面に摺擦力が加えられても、継手本体の外面における絶縁性能は失われることはない。よって、第１、第２配管部材相互間の絶縁性能を確保することができる。
さらに、防水カバーを設けたものや、防水カバーを絶縁部材に対して水密状態に取り付けたもの、継手本体と絶縁部材の接する部分に絶縁性の接着剤やシ−ル剤で水密にしたものでは、雨水による第１配管部材と第２配管部材の導通を確実に防止することができる。
Since the present invention has the above configuration, it has the following unique effects.
According to the present invention, even if the insulating property of the annular packing provided between the first and second piping members is weak or a conductive foreign substance adheres between the first and second piping members, the joint On the outer surface of the main body, at least the portion facing the second piping member via the annular packing is formed with an insulating film by ceramic spraying, so that the insulation between the joint main body and the second piping member is ensured. It will be maintained, and thereby the insulation between the first and second piping members will also be maintained.
The insulating coating by ceramic spraying is not torn or peeled off by an external force as compared with the coating by coating. Therefore, even if a rubbing force is applied to the outer surface of the joint body during mounting work or the like, the outer surface of the joint body is applied. Insulation performance in is not lost. Therefore, the insulation performance between the first and second piping members can be ensured.
Furthermore, in the case where a waterproof cover is provided, the waterproof cover is attached to the insulating member in a watertight state, or the part where the joint body and the insulating member are in contact with each other is watertightened with an insulating adhesive or sealant. , It is possible to reliably prevent the conduction between the first piping member and the second piping member due to rainwater.
以下に、本発明を実施するための最良の形態について添付図面を参照しながら説明する。
この実施の形態に採用されるガスメータ(M)は、図１に示すように、屋外にて直立するガス引き込み用配管(3)とガス送り込み用配管（図示せず）との間に、吊設されているもので、家庭等でのガスの使用量を計測するための計測器等が内蔵されているメータ本体(30)の頂面に、ガス入口筒部(33)とガス出口筒部（図示せず）とが、正面視にて並列して突出しており、ガス入口筒部(33)が、メータ用ガス栓のガス栓本体(10)に、袋ナット(31)によって接続される構成となっている。
ガス栓本体(10)の上流端は、Ｌ型継手(25)を介して直立するガス引き込み用配管(3)に接続される。
なお、図示しないが、ガス出口筒部にはガス圧検圧用接続具としての配管継手が同じく袋ナットによって接続されており、ガス圧検圧用接続具の下流端は、継手を介して又は直接ガス送り込み用配管に接続されているものとする。
Hereinafter, the best mode for carrying out the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, the gas meter (M) adopted in this embodiment is suspended between the gas drawing pipe (3) standing upright outdoors and the gas feeding pipe (not shown). The gas inlet pipe (33) and the gas outlet pipe (33) are located on the top surface of the meter body (30), which has a built-in measuring instrument for measuring the amount of gas used at home. (Not shown) are projected in parallel in front view, and the gas inlet cylinder (33) is connected to the gas plug body (10) of the gas plug for the meter by a bag nut (31). It has become.
The upstream end of the gas plug body (10) is connected to an upright gas drawing pipe (3) via an L-shaped joint (25).
Although not shown, a piping joint as a gas pressure detection connector is also connected to the gas outlet cylinder by a bag nut, and the downstream end of the gas pressure detection connector is gas through the joint or directly. It is assumed that it is connected to the feed pipe.
メータ用ガス栓は、図１及び図２に示すように、正面側に位置する操作つまみ(19)と、操作つまみ(19)と共に回動してガス流路(180)を開閉するせん(18)が収容されているガス栓本体(10)とからなり、ガス栓本体(10)の下流側接続筒部(10a)には、継手本体(1)の一端（図面では上端部）が、Ｏリング(17)を介して気密状態に一体的に螺合接続されている。 As shown in FIGS. 1 and 2, the meter gas stopper rotates together with the operation knob (19) located on the front side and the operation knob (19) to open and close the gas flow path (180) (18). ) Is housed in the gas plug body (10), and one end (upper end in the drawing) of the joint body (1) is attached to the downstream connection cylinder part (10a) of the gas plug body (10). It is integrally screwed and connected in an airtight state via a ring (17).
継手本体(1)の他端（図面では下端部）近傍には、環状鍔部(11)が外側に張り出していると共に、環状鍔部(11)の下面(11a)の基端部から下方へ延設筒部(12)が延設されている。
特に、この実施の形態では、図３に示すように、継手本体(1)の外表面のうち、環状鍔部(11)の外側面(11b)から下面(11a)、さらには、延設筒部(12)の外側面(12a)を経て、延設筒部(12)の下端面(12b)に至る範囲に、セラミック溶射を施すことにより、絶縁被膜(2)を形成する。
これには、例えば、電気絶縁特性を有し、強度の高いアルミナを、セラミック溶射により、鉄製の継手本体(1)の凸凹した外表面に吹き付けることにより、継手本体(1)の上記した範囲に、確実に絶縁被膜(2)を形成することができる。
In the vicinity of the other end (lower end in the drawing) of the joint body (1), the annular collar (11) projects outward, and the lower surface (11a) of the annular collar (11) extends downward from the base end. The extension cylinder part (12) is extended.
In particular, in this embodiment, as shown in FIG. 3, among the outer surfaces of the joint body (1), the outer surface (11b) to the lower surface (11a) of the annular flange portion (11), and further, the extension cylinder. An insulating coating (2) is formed by applying ceramic spraying to a range extending from the outer surface (12a) of the portion (12) to the lower end surface (12b) of the extending cylinder portion (12).
For example, alumina having electrical insulation characteristics and high strength is sprayed onto the uneven outer surface of the iron joint body (1) by ceramic spraying to cover the above range of the joint body (1). , The insulating film (2) can be formed reliably.
さらに、継手本体(1)の環状鍔部(11)の外側面(11b)から上面(11c)及び胴部外側面(11d)を経て、ガス栓本体(10)の下流側接続筒部(10a)の外周面に至る範囲に、環状の絶縁部材(21)を被覆させている。
絶縁部材(21)は、ガラス繊維入りポリアセタール樹脂等の絶縁樹脂から筒状に構成されており、環状鍔部(11)の外側面(11b)に絶縁被膜(2)を介して被覆される大径筒部(21a)と、環状鍔部(11)の上面(11c)に被覆される水平面部(21b)と、水平面部(21b)から上方に延設されて胴部外側面(11d)からガス栓本体(10)の下流側接続筒部(10a)の下端部に至る範囲を連続して被覆する小径筒部(21c)と、ガス栓本体(10)の下流側接続筒部(10a)の下端部に続く外周面を被覆する上部筒部(21d)とからなり、全体に、継手本体(1)の外面に接着剤やシール剤で水密状態に接している。
Further, from the outer surface (11b) of the annular flange portion (11) of the joint body (1) to the upper surface (11c) and the outer surface (11d) of the body portion, the downstream side connecting cylinder portion (10a) of the gas plug main body (10) is further passed. ) Is covered with an annular insulating member (21) in a range extending to the outer peripheral surface .
The insulating member (21) is made of an insulating resin such as a polyacetal resin containing glass fiber in a tubular shape, and the outer surface (11b) of the annular flange portion (11) is covered with an insulating coating (2). From the tubular portion (21a), the horizontal surface portion (21b) covered on the upper surface (11c) of the annular flange portion (11), and the outer surface (11d) of the body portion extending upward from the horizontal surface portion (21b). A small-diameter cylinder (21c) that continuously covers the range extending to the lower end of the downstream connection cylinder (10a) of the gas plug body (10), and a downstream connection cylinder (10a) of the gas plug body (10). It consists of an upper tubular part (21d) that covers the outer peripheral surface following the lower end of the joint body, and is in contact with the outer surface of the joint body (1) in a watertight state with an adhesive or a sealing agent.
そして、環状鍔部(11)の上面(11c)に被覆される水平面部(21b)の上に、リング体(22)を介して、袋ナット(31)の係止片部(32)を係止させる。
なお、ガス栓本体(10)の下流側接続筒部(10a)から袋ナット(31)の係止片部(32)の上面に至る範囲には、絶縁性を持たせたエチレンプロピレンゴム（ＥＰＤＭ）の絶縁弾性材料からなる環状の防水カバー(23)を水密状態に被覆させている。
これにより、ガス引き込み用配管部材(3)の上端に、操作つまみ(19)を有するガス栓本体(10)と、外表面の所定範囲にセラミック溶射による絶縁被膜(2)が形成された継手本体(1)と、下流側接続筒部(10a)から継手本体(1)に至る範囲に被覆させた絶縁部材(21)と、環状鍔部(11)の上面(11c)に、絶縁部材(21)の水平面部(21b)及びリング体(22)を介して、係止片部(32)が係止された袋ナット(31)と、袋ナット(31)の係止片部(32)の上面からガス栓本体(10)の下流側接続筒部(10a)に至る範囲に被覆される防水カバー(23)とからなるメータ用ガス栓ユニット(100)が、Ｌ型継手(25)を介して接続される態様となる。
Then, the locking piece portion (32) of the bag nut (31) is engaged on the horizontal surface portion (21b) covered with the upper surface (11c) of the annular collar portion (11) via the ring body (22). Stop it.
In addition, ethylene propylene rubber (EPDM) having insulation is provided in the range from the downstream connection cylinder portion (10a) of the gas plug main body (10) to the upper surface of the locking piece portion (32) of the bag nut (31). ) Is coated with an annular waterproof cover (23) made of an insulating elastic material in a watertight state.
As a result, a gas plug body (10) having an operation knob (19) and an insulating coating (2) formed by ceramic spraying in a predetermined range on the outer surface are formed on the upper end of the gas drawing piping member (3). (1), the insulating member (21) covering the area from the downstream connecting cylinder (10a) to the joint body (1), and the insulating member (21c) on the upper surface (11c) of the annular flange (11). ), The locking piece (32) is locked via the horizontal surface portion (21b) and the ring body (22), and the locking piece (32) of the bag nut (31) is locked. A gas plug unit (100) for a meter composed of a waterproof cover (23) covered in a range from the upper surface to the downstream connection cylinder portion (10a) of the gas plug main body (10) is via an L-shaped joint (25). Is connected.
メータ用ガス栓ユニット(100)に、ガスメータ(M)のガス入口筒部(33)を接続させるには、まず、袋ナット(31)を、ガス栓本体(10)側に引っ張り上げて上方へ移動させ、継手本体(1)の環状鍔部(11)の下面(11a)に、ガス入口筒部(33)の頂面を、環状パッキン(20)を介して当接させる。
防水カバー(23)は、上記したように、絶縁弾性材料により成型されているから、袋ナット(31)の上方への移動に伴って、弾性変形可能となっている。
その後、袋ナット(31)を下方へ移動させ、締付方向に回転させれば、袋ナット(31)の雌ネジ部(31a)が、ガス入口筒部(33)の雄ネジ部(34)に螺合しながら、袋ナット(31)は降下していく。
To connect the gas inlet cylinder (33) of the gas meter (M) to the gas plug unit (100) for the meter, first pull the bag nut (31) toward the gas plug body (10) and move it upward. It is moved so that the top surface of the gas inlet cylinder portion (33) is brought into contact with the lower surface (11a) of the annular flange portion (11) of the joint body (1) via the annular packing (20).
Since the waterproof cover (23) is molded from the insulating elastic material as described above, it can be elastically deformed as the bag nut (31) moves upward.
After that, if the bag nut (31) is moved downward and rotated in the tightening direction, the female threaded portion (31a) of the bag nut (31) becomes the male threaded portion (34) of the gas inlet tube (33). The bag nut (31) descends while screwing into.
袋ナット(31)を最終締付位置に達するまで締め付けると、環状パッキン(20)が、ガス入口筒部(33)の頂面と環状鍔部(11)の下面(11a)との間で押圧されると共に、 環状鍔部(11)の上面(11c)に被覆させている絶縁部材(21)の水平面部(21b)が、リング体(22)を介して、袋ナット(31)の係止片部(32)によって押圧される。
この状態において、図３に示すように、ガス栓本体(10)の下流側接続筒部(10a)と継手本体(1)との接続体(110)と、ガスメータ(M)のガス入口筒部(33)と袋ナット(31)の接続体(300)とは、絶縁部材(21)と絶縁被膜(2)と環状パッキン(20)によって電気的に絶縁された関係となっている。これにより、迷走電流がガスメータ(M)からガス引き込み用配管(3)へ流れることはない。
When the bag nut (31) is tightened until it reaches the final tightening position, the annular packing (20) presses between the top surface of the gas inlet cylinder (33) and the lower surface (11a) of the annular flange (11). At the same time, the horizontal surface portion (21b) of the insulating member (21) covering the upper surface (11c) of the annular flange portion (11) is locked by the bag nut (31) via the ring body (22). Pressed by one part (32).
In this state, as shown in FIG. 3, the connection body (110) between the downstream connection cylinder portion (10a) of the gas plug main body (10) and the joint main body (1), and the gas inlet cylinder portion of the gas meter (M). The connection body (300) between (33) and the bag nut (31) is electrically insulated by an insulating member (21), an insulating coating (2), and an annular packing (20). As a result, the stray current does not flow from the gas meter (M) to the gas drawing pipe (3).
なお、図示しないが、ガスメータ(M)のガス出口部も同様な要領で袋ナットによって、ガス圧検圧用接続具としての配管継手が絶縁状態に接続されるようにすることもできる。 Although not shown, the gas outlet portion of the gas meter (M) can also be connected in an insulated state by a bag nut in the same manner to connect the pipe joint as the gas pressure detection connector.
環状パッキン(20)としては、絶縁性を持たせたニトリルゴム（ＮＢＲ）製の絶縁パッキンが好ましいが、間違って絶縁性の弱いパッキンが使用されても、また、延設筒部(12)の下端面(12b)のように、環状パッキン(20)が装着されていない範囲に、導電性の異物や継手のバリ等が付着することがあっても、環状パッキン(20)の装着域からその上方に続く環状鍔部(11)の外側面(11b)や延設筒部(12)の下端面(12b)には、セラミック溶射による絶縁被膜(2)が設けられているから、継手本体(1)とガス入口筒部(33)との間には絶縁性を確保することができる。 As the annular packing (20), an insulating packing made of nitrile rubber (NBR) having an insulating property is preferable, but even if a packing having a weak insulating property is mistakenly used, the extending cylinder portion (12) may be used. Even if conductive foreign matter or burrs of the joint adhere to the area where the annular packing (20) is not attached, such as the lower end surface (12b), it can be seen from the attachment area of the annular packing (20). Since the insulating coating (2) by ceramic spraying is provided on the outer surface (11b) of the annular flange portion (11) and the lower end surface (12b) of the extending cylinder portion (12) that continue upward, the joint body ( Insulation can be ensured between 1) and the gas inlet cylinder (33).
なお、袋ナット(31)の締め付けに伴って、絶縁部材(21)の水平面部(21b)が袋ナット(31)の係止片部(32)によって押圧されるが、両者間には、リング体(22)を介在させているから、水平面部(21b)の損傷を防止することができる。 As the bag nut (31) is tightened, the horizontal surface portion (21b) of the insulating member (21) is pressed by the locking piece portion (32) of the bag nut (31), but there is a ring between the two. Since the body (22) is interposed, damage to the horizontal surface portion (21b) can be prevented.
さらに、防水カバー(23)は、上記したように、絶縁性を持たせたエチレンプロピレンゴム（ＥＰＤＭ）の絶縁弾性材料により成型されており、上端に内方に突出するように設けられた環状凸部(24)を、ガス栓本体(10)の下流側接続筒部(10a)の外側面に設けられた環状係合溝(14)に嵌め込むことにより、抜け止め状態に装着することができる。
Further, as described above, the waterproof cover (23) is molded from an insulating elastic material of ethylene propylene rubber (EPDM) having an insulating property, and is provided at the upper end so as to protrude inward. By fitting the portion (24) into the annular engaging groove (14) provided on the outer surface of the downstream connecting cylinder portion (10a) of the gas plug main body (10), it can be mounted in a retaining state. ..
防水カバーの筒状部(23a)とガス栓本体（10）の下流側接続筒部（10a）及び絶縁部材(21)の上部筒部(21d)は絶縁弾性材料の締付け力を大きく設定できるのでより水密性を増す事が出来る。
なお、防水カバー(23)によって、ガス栓本体(10)の下流側接続筒部(10a)と絶縁部材(21)との境界部分、袋ナット(31)の係止片部(32)の絶縁部材(21)の水平面部(21b)への係止部が覆われる構成となっているから、袋ナット(31)内への雨水や散水等による水滴の浸入は確実に防止でき、絶縁部材(21)が水滴によって絶縁性能が低下したり腐食したりする不都合を防止することができる。
Since the tubular part (23a) of the waterproof cover, the downstream connection tubular part (10a) of the gas plug body (10), and the upper tubular part (21d) of the insulating member (21) can set a large tightening force of the insulating elastic material. The watertightness can be increased.
The waterproof cover (23) insulates the boundary between the downstream connecting cylinder (10a) and the insulating member (21) of the gas plug body (10) and the locking piece (32) of the bag nut (31). Since the locking portion of the member (21) to the horizontal surface portion (21b) is covered, it is possible to reliably prevent water droplets from entering the bag nut (31) due to rainwater, sprinkling, etc. 21) can prevent the inconvenience of deterioration of insulation performance and corrosion due to water droplets.
なお、図２に示すように、継手本体(1)の下端部に感熱ヒューズ(5)を取り付ける場合、感熱ヒューズ(5)を構成している円筒ケース(50)の開放端部(51)を、継手本体(1)の延設筒部(12)に外嵌させる際に、延設筒部(12)の外側面(12a)が開放端部(51)によって摺擦されても、延設筒部(12)の外側面(12a)に設けられているセラミック溶射による絶縁被膜(2)は、不用意に剥がれることはないから、絶縁性能は維持される。 As shown in FIG. 2, when the thermal fuse (5) is attached to the lower end of the joint body (1), the open end (51) of the cylindrical case (50) constituting the thermal fuse (5) is attached. , Even if the outer surface (12a) of the extended cylinder (12) is rubbed by the open end (51) when it is externally fitted to the extended cylinder (12) of the joint body (1), it is extended. Since the insulating coating (2) provided on the outer surface (12a) of the tubular portion (12) by ceramic spraying is not inadvertently peeled off, the insulating performance is maintained.
さらに、セラミック溶射による絶縁被膜(2)を、継手本体(1)の外表面全域に設ける構成としておけば、絶縁性能が一層向上したものとなり、絶縁部材(2)の絶縁性能が劣化するようなことがあっても、ガス栓本体(10)と、メータ本体(30)との絶縁性能を保持することができる。 Further, if the insulating coating (2) by ceramic spraying is provided over the entire outer surface of the joint body (1), the insulating performance is further improved and the insulating performance of the insulating member (2) is deteriorated. Even in some cases, the insulation performance between the gas plug body (10) and the meter body (30) can be maintained.
(1) ・・・・・・継手本体
(10)・・・・・・ガス栓本体
(10a)・・・・・下流側接続筒部（第１配管部材）
(11)・・・・・・環状鍔部
(11a) ・・・・・下面（一方面）
(11b) ・・・・・外側面
(11c) ・・・・・上面（他方面）
(12)・・・・・・延設筒部
(12a) ・・・・・外側面
(2) ・・・・・・絶縁被膜
(21) ・・・・・・絶縁部材
(20)・・・・・・環状パッキン
(31)・・・・・・袋ナット
(31a) ・・・・・雌ネジ部
(32)・・・・・・係止片部
(33) ・・・・・ガス入口筒部（第２配管部材）
(34)・・・・・・雄ネジ部
(1) ・ ・ ・ ・ ・ ・ Joint body
(10) ・ ・ ・ ・ ・ ・ ・ ・ Gas plug body
(10a) ・ ・ ・ ・ ・ Downstream connection cylinder (first piping member)
(11) ・ ・ ・ ・ ・ ・ ・ ・ Circular collar
(11a) ・ ・ ・ ・ ・ Bottom surface (one side)
(11b) ・ ・ ・ ・ ・ Outer surface
(11c) ・ ・ ・ ・ ・ Top surface (other surface)
(12) ・ ・ ・ ・ ・ ・ ・ ・ Extended cylinder
(12a) ・ ・ ・ ・ ・ Outer surface
(2) ・ ・ ・ ・ ・ ・ Insulation film
(21) ・ ・ ・ ・ ・ ・ Insulation member
(20) ・ ・ ・ ・ ・ ・ ・ ・ Circular packing
(31) ・ ・ ・ ・ ・ ・ ・ ・ Bag nut
(31a) ・ ・ ・ ・ ・ Female screw part
(32) ・ ・ ・ ・ ・ ・ Locking piece
(33) ・ ・ ・ ・ ・ Gas inlet cylinder (second piping member)
(34) ・ ・ ・ ・ ・ ・ Male screw part
Claims (5)
前記継手本体の他端近傍には、外方に張り出す環状鍔部とそれより前記他端側に延設された延設筒部が設けられると共に、前記環状鍔部の前記延設筒部側に面する一方面を、第２配管部材の接続端面に、環状パッキンを介して当接させ、
前記継手本体の外面のうち、前記環状鍔部の外側面から前記一方面の反対側に位置する他方面を経て、前記第１配管部材に至る範囲に、環状の絶縁部材を密に外嵌させ、
前記環状鍔部の前記他方面に前記絶縁部材を介して係止する係止片部と、前記第２配管部材に設けられた雄ネジ部に螺合可能な雌ネジ部を有する袋ナットが設けられ、
前記継手本体の外面のうち、少なくとも、前記環状鍔部の外側面から前記一方面に至る範囲及びそれに続く前記延設筒部の外側面からその端面に至る範囲に、セラミック溶射による絶縁被膜を形成し、
前記絶縁部材は、前記環状鍔部の外側面に前記絶縁被膜を介して被覆される大径筒部と、前記環状鍔部の前記他方面に被覆される水平面部と、前記水平面部から延設されて前記継手本体の胴部外側面から前記第１配管部材の下端部に至る範囲を連続して被覆する小径筒部と、前記第１配管部材の下端部に続く外側面を被覆する上部筒部とからなり、
前記袋ナットの締付完了時にて、前記第１配管部材の外周面から前記袋ナットの上流側端部の外周面に至る範囲を密に被覆する絶縁弾性材料製の筒状の防水カバーを設け、
前記防水カバーの筒状部内周面を前記絶縁部材の前記上部筒部外周部に対して水密状態となるように取り付けたことを特徴とする継手構造。 One end of the joint body is airtightly connected to the first piping member,
Wherein the other end near the joint body, the extended cylinder portion extending annular flange portion and the other end side than projecting outward are provided, the extended cylinder portion of the annular flange portion One surface facing the surface is brought into contact with the connection end surface of the second piping member via an annular packing.
Of the outer surface of the joint body, the annular insulating member is densely fitted to the outer surface of the annular flange portion through the other surface located on the opposite side of the one surface to the first piping member. ,
A locking piece for locking through the insulating member to the other surface of the annular flange portion, said second cap nut having a screwable female screw portion in the male threaded portion provided on the piping member is provided Be,
Of the outer surface of the joint body, formed at least in a range leading to the end face thereof from the outer surface of the extended cylinder portion from the outer surface continues scope and it leads to the one surface of the annular flange portion, the insulating coating by ceramic spray and,
The insulating member extends from the horizontal surface portion, a large-diameter tubular portion in which the outer surface of the annular flange portion is coated via the insulating coating, a horizontal surface portion covered in the other surface of the annular flange portion, and the horizontal surface portion. A small-diameter cylinder that continuously covers the range from the outer surface of the body of the joint body to the lower end of the first piping member, and an upper cylinder that covers the outer surface following the lower end of the first piping member. It consists of a department
When the tightening of the bag nut is completed, a tubular waterproof cover made of an insulating elastic material that densely covers the range from the outer peripheral surface of the first piping member to the outer peripheral surface of the upstream end portion of the bag nut is provided. ,
A joint structure characterized in that the inner peripheral surface of the tubular portion of the waterproof cover is attached so as to be watertight with respect to the outer peripheral portion of the upper tubular portion of the insulating member .
前記第２配管部材は、ガスメータのガス入口筒部とし、
前記袋ナットの締付完了時にて、前記メータ用ガス栓の下流側接続筒部の外側面から前記袋ナットの係止片部の外側面に至る範囲を密に被覆するように、絶縁弾性材料からなる防水カバーを設けたことを特徴とする継手構造。
In the joint structure according to any one of claims 1 to 4 , the first piping member is a downstream connecting cylinder portion of a gas plug for a meter.
The second piping member is a gas inlet cylinder of a gas meter.
When the tightening of the bag nut is completed, the insulating elastic material densely covers the range from the outer surface of the downstream connection cylinder portion of the gas plug for the meter to the outer surface of the locking piece portion of the bag nut. A joint structure characterized by a waterproof cover made of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016216883A JP6810418B2 (en) | 2016-11-07 | 2016-11-07 | Joint structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016216883A JP6810418B2 (en) | 2016-11-07 | 2016-11-07 | Joint structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2018076876A JP2018076876A (en) | 2018-05-17 |
| JP6810418B2 true JP6810418B2 (en) | 2021-01-06 |
Family
ID=62149149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2016216883A Active JP6810418B2 (en) | 2016-11-07 | 2016-11-07 | Joint structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6810418B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024211025A1 (en) * | 2024-11-18 | 2025-08-14 | Carl Zeiss Smt Gmbh | Component of a lithography system, loss prevention device, method for producing a component of a lithography system and lithography system |
-
2016
- 2016-11-07 JP JP2016216883A patent/JP6810418B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018076876A (en) | 2018-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103094863B (en) | A kind of pipe connecting piece hermetically-sealed construction and pipe connecting piece | |
| WO2004090407A1 (en) | Tube connection structure | |
| KR20120048484A (en) | Earthing contact | |
| JP6810418B2 (en) | Joint structure | |
| KR101780894B1 (en) | Flexible pipe assembly for sprinkler | |
| JP5379649B2 (en) | Steel pipe fittings | |
| US20030184085A1 (en) | Dual material threading for pipe adapter | |
| US20140028019A1 (en) | Conduit hub with wiper seal | |
| JPH06235484A (en) | Coupler part of sprinkler winding out piping | |
| CN103178474B (en) | A kind of pipe fitting and sealing structure thereof | |
| WO2020079856A1 (en) | Bolt/nut protection cap | |
| CN106151746A (en) | A kind of check-valves | |
| JP6278733B2 (en) | Gas stopper for gas meter | |
| JP5191832B2 (en) | Protective cap | |
| JPH0313677Y2 (en) | ||
| CN216988278U (en) | Coating cup structure for paint spray gun | |
| JP2015179058A (en) | Gas stopper for gas meter | |
| CN119482257B (en) | Intermediate joint sealing protection device and method for cable line | |
| JP2009077820A (en) | Overflow pipe fitting mounting structure | |
| CN112361600B (en) | Shell assembly and water heater with good sealing effect | |
| JP2001208288A (en) | Anticorrosive pipe joint | |
| KR20170110029A (en) | Flexible pipe assembly for sprinkler | |
| CN105952998A (en) | Pipe connecting structure | |
| JPS5824744Y2 (en) | Gas meter connection device | |
| CN207729103U (en) | Overcoating PVC made of metal can be around metal hose joint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20190920 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20200818 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20200820 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20201001 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20201110 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20201203 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6810418 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313532 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |