JP2642689B2 - Manufacturing method of synthetic resin valve - Google Patents
Manufacturing method of synthetic resin valveInfo
- Publication number
- JP2642689B2 JP2642689B2 JP22583388A JP22583388A JP2642689B2 JP 2642689 B2 JP2642689 B2 JP 2642689B2 JP 22583388 A JP22583388 A JP 22583388A JP 22583388 A JP22583388 A JP 22583388A JP 2642689 B2 JP2642689 B2 JP 2642689B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- synthetic resin
- manufacturing
- valve body
- packing
- 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 - Fee Related
Links
Landscapes
- Valve Housings (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は合成樹脂製の弁に関するもので、詳しくは配
管と接続する弁の接続口内面に電熱線を埋設し、接続す
る管と電気融着して接続する合成樹脂製の弁に関するも
のである。Description: TECHNICAL FIELD The present invention relates to a valve made of synthetic resin, and more specifically, a heating wire is buried in an inner surface of a connection port of a valve to be connected to a pipe, and a pipe to be connected is connected to an electrofusion valve. The present invention relates to a synthetic resin valve to be attached and connected.
合成樹脂製弁の構造は、本出願人が特公昭59−22109
号公報で開示された発明による第8図に示すものがあ
る。このものは、弁体の球形部を包持する弁体包持部お
よびその両側に設けた管路との接続口からなる一体に形
成された弁箱内に、前記接続口と連通して流路を形成す
る通孔を有する前記弁体を回動自在に包持し、前記弁体
は前記通孔両端側の球形部に前記弁箱の弁体包持部に向
かって拡張する反発力を保有させて弁箱内に包持した球
形弁である。The structure of the synthetic resin valve is described in Japanese Patent Publication No.
FIG. 8 according to the invention disclosed in Japanese Unexamined Patent Publication (Kokai) Publication. This fluid flows into an integrally formed valve box comprising a valve body holding portion for holding the spherical portion of the valve body and connection ports with pipes provided on both sides thereof in communication with the connection port. The valve body having a through hole that forms a passage is rotatably held, and the valve body has a spherical portion at both ends of the through hole with a repulsive force that expands toward the valve body holding portion of the valve box. It is a spherical valve held and enclosed in a valve box.
弁機能の最も重要な点は内部流体の密封性にあるが、
これが前記した弁体に反発力を保有させて弁箱内に包持
し、弁箱と弁体とのシール面圧を高め密封性能を良好に
している。The most important point of the valve function is the sealing of the internal fluid,
As a result, the valve element retains the repulsive force and is held in the valve box, thereby increasing the sealing surface pressure between the valve box and the valve element and improving the sealing performance.
ところで一般に合成樹脂製弁は熱に対して敏感で管と
の接続における温度上昇の過程を経ると変形を生じ初期
のシール面圧が変化し、シール性能が低下する問題があ
る。従って合成樹脂弁における管路との接続部が接着剤
を用いて接続したりメカニカル方式で接続するものがあ
るが、電気融着式の弁は弁体とのシール部に管接続持の
熱による悪影響があるため実用化されなかった。By the way, synthetic resin valves are generally sensitive to heat, and have a problem that they undergo deformation during the process of increasing the temperature at the time of connection with the pipe, resulting in a change in the initial sealing surface pressure and a decrease in sealing performance. Therefore, there is a synthetic resin valve in which a connection portion with a pipe line is connected using an adhesive or connected mechanically, but an electrofusion type valve is connected to a seal portion with a valve body by heat generated by connecting a pipe. It was not put to practical use due to its adverse effects.
本発明は上記の問題点を解消して電気融着によって管
と接続する接続部を有する合成樹脂弁を提供するもので
ある。An object of the present invention is to provide a synthetic resin valve having a connecting portion for connecting to a pipe by electrofusion while solving the above problems.
金属製パッキンケースと該ケース内面に装着したパッ
キンの間に挟持した弁体と、該弁体を回転する弁棒を有
する弁の要部の外側へ樹脂製本体のインナー部分を成形
し、該インナー部分の外周に電熱線を巻き付け、その
後、樹脂製本体のアウター部分を該インナー部分の外側
へ成形することを特徴とする合成樹脂弁の製造方法。Forming an inner portion of a resin body outside a main part of a valve having a valve body sandwiched between a metal packing case and a packing mounted on the inner surface of the case and a valve rod for rotating the valve body; A method for manufacturing a synthetic resin valve, characterized in that a heating wire is wound around the outer periphery of the portion, and then the outer portion of the resin body is formed outside the inner portion.
本発明は上記構成であるから、弁体とのシール用パッ
キンは金属製パッキンケースの内面に装着されており、
接続部の電熱線巻線部の加熱による本体が変形する影響
が金属製パッキンケースによって遮断されるので弁体と
のシール部にまで影響しない。このため管路との接続後
においても良好なシール性を確保することができる。Since the present invention has the above configuration, the packing for sealing with the valve body is mounted on the inner surface of the metal packing case,
The deformation of the main body due to the heating of the heating wire winding portion of the connection portion is blocked by the metal packing case, so that the seal portion with the valve body is not affected. Therefore, good sealing performance can be ensured even after connection with the pipeline.
第1図、第2図、及び第3図によって製造方法と構造
を説明する。The manufacturing method and structure will be described with reference to FIGS. 1, 2, and 3.
まず第1番目に第1図に示すように筒状ケース10の中
央部に設けた穴11へ弁棒20の上部21を該ケースの内側か
ら挿入し、外へ突出させる。つぎに球状弁体30を該ケー
ス10の内側へ挿入し、弁棒下端部22と該球状弁体30の凹
部31を係合する。その後、金属製パッキンケース40を該
ケース10の両端へねじ込み、球状弁体30を両側から挟持
する。この様にして合成樹脂弁の要部5を構成する。な
おパッキン41はゴム又は合成樹脂等の弾性体とし、あら
かじめ金属製パッキンケース40に一体焼付成形又は接着
あるいははめ込み等の方法で装着しておく。First, as shown in FIG. 1, the upper part 21 of the valve stem 20 is inserted into the hole 11 provided at the center of the cylindrical case 10 from the inside of the case, and is projected outside. Next, the spherical valve body 30 is inserted into the inside of the case 10, and the lower end portion 22 of the valve rod and the concave portion 31 of the spherical valve body 30 are engaged. Thereafter, the metal packing case 40 is screwed into both ends of the case 10, and the spherical valve body 30 is sandwiched from both sides. Thus, the main part 5 of the synthetic resin valve is constituted. The packing 41 is an elastic body such as rubber or synthetic resin, and is previously mounted on the metal packing case 40 by integral baking, bonding, or fitting.
第2番目に第2図に示すように該要部5に左右両側か
ら芯金60,60′を挿入した上でインナー用成形金型(図
示せず)の中へセットし、要部5の外側に本体インナー
部分70を射出成形により形成する。Secondly, as shown in FIG. 2, cores 60, 60 'are inserted into the main part 5 from both right and left sides, and then set in an inner mold (not shown). The body inner part 70 is formed on the outside by injection molding.
第3番目に該インナー部分70の両端外周に設けた溝部
71に電熱線72を巻き付け、通電用コネクターピン73を取
り付け、アウター用成形金型(図示せず)に前記芯金6
0,60′を含むインナー部分全体74をセットして本体アウ
ター部分81を成形する。その後芯金60,60′を抜き第3
図に示すようにOリング90とスペーサー91を組み付け、
ハンドル92を止めねじ93で弁棒20の上端部に固定して完
成する。Thirdly, grooves provided on the outer periphery of both ends of the inner portion 70
A heating wire 72 is wound around 71, a connector pin 73 for energization is attached, and the core metal 6 is attached to an outer molding die (not shown).
The entire inner portion 74 including the inner and outer portions 81 including 0,60 'is set to form the outer portion 81 of the main body. After that, remove the metal core 60,60 '
Assemble the O-ring 90 and the spacer 91 as shown in the figure,
The handle 92 is fixed to the upper end of the valve stem 20 with a set screw 93 to complete the process.
なお各部品の材質はつぎの通りである。 The material of each component is as follows.
本体はインナー部分70のアウター部分81ともポリエチ
レン等の融着可能な合成樹脂とし、パッキンケース40及
び筒状ケース10は管接続持の融着熱によって容易に変形
しない金属製とする。球状弁体30及び弁棒20は合成樹
脂、金属どちらでも良いが本体を成形する際の温度にお
いて容易に熱変形しないものとする。The main body is made of a synthetic resin that can be fused, such as polyethylene, with the outer portion 81 of the inner portion 70, and the packing case 40 and the cylindrical case 10 are made of a metal that is not easily deformed by the heat of fusion of pipe connection. The spherical valve body 30 and the valve stem 20 may be made of either synthetic resin or metal, but shall not easily be thermally deformed at the temperature at which the main body is molded.
第4図は本発明による別の実施例の要部5′を示す。
本例では球状弁体30と弁棒21を組み合わせた後、球状弁
体30の左右から金属製パッキンケース40′,40″ではさ
みつけた状態を示し、この状態で第1実施例と同様に芯
金60,60′を球状弁体30の内側へ挿入した上でインナー
用成形金型の中にセットし、要部5′の外側に本体イン
ナー部分を射出成形により形成するものである。FIG. 4 shows a main part 5 'of another embodiment according to the present invention.
In this example, after the spherical valve element 30 and the valve rod 21 are combined, a state is shown in which metal packing cases 40 'and 40 "are sandwiched from the left and right of the spherical valve element 30, and in this state, as in the first embodiment. The cores 60, 60 'are inserted into the spherical valve body 30 and then set in an inner mold, and the inner part of the main body is formed outside the main part 5' by injection molding.
第5図は本発明による第3の実施例で、合成樹脂製の
バタフライ弁の完成品を示す。FIG. 5 shows a third embodiment of the present invention, which is a completed butterfly valve made of synthetic resin.
あらかじめパッキンケース40′の内面にゴム又は合成
樹脂等の弾性体のパッキン43を一体焼付成形又は接着あ
るいははめ込み等の方法にて装着してある。パッキン43
は第6図に示すごとく環状で弁体32の外周および弁棒23
の外周をシールする。An elastic packing 43 made of rubber, synthetic resin, or the like is mounted on the inner surface of the packing case 40 'in advance by integral baking, bonding, fitting, or the like. Packing 43
Is an outer periphery of the valve body 32 and the valve stem 23 as shown in FIG.
Seal the outer periphery of.
製造方法は、第1番目にあらかじめパッキン43を装着
したパッキンケース40′の内側へ弁体32と弁棒23を組み
付け、要部を完成する。The manufacturing method is as follows. First, the valve element 32 and the valve stem 23 are assembled inside the packing case 40 'in which the packing 43 is mounted in advance, and the main part is completed.
第2番目に第1実施例と同様に芯金をパッキンケース
40′の両側からはめ込み、要部と芯金をインナー用成形
金型の中にセットし、要部の外側に本体インナー部分75
を射出成形により形成する。Second, the core is packed in a packing case as in the first embodiment.
Insert the main part and the core metal into the inner mold and insert the main body inner part 75 outside the main part.
Is formed by injection molding.
第3番目に第1実施例と同様に該インナー部分75の両
端外周部に電熱線72を巻き付け、通電用コネクターピン
73を取り付け、アウター用成形金型の前記芯金を含むイ
ンナー部分全体をセットして本体アウター部分83を成形
する。その後芯金を抜き第5図に示すようにOリング9
0′及びハンドル94を取り付けて完成する。Thirdly, similarly to the first embodiment, a heating wire 72 is wound around the outer periphery of both ends of the inner portion 75, and
73 is attached, and the entire inner portion including the core metal of the outer mold is set to form the main body outer portion 83. Thereafter, the core is removed and the O-ring 9 is inserted as shown in FIG.
Attach 0 'and handle 94 to complete.
本発明による合成樹脂弁と管路との接続に際しては、
本体両側の接続口82に合成樹脂製の管を挿入した後、コ
ネクターピン73に電流を通電すると電熱線72の巻線部が
加熱されて接続口内面と管の外面が溶融し一体に融着さ
れる。このとき接続口82の加熱によって本体の全体も加
熱されるが、球状弁体39とパッキン41のシール部分は強
固な金属製パッキンケース40な内側に設けられているた
め、熱による本体の変形の影響は防止され、良好なシー
ル性が保てる。When connecting the synthetic resin valve according to the present invention to the pipeline,
After inserting a synthetic resin tube into the connection port 82 on both sides of the main body, when current is applied to the connector pin 73, the winding part of the heating wire 72 is heated and the connection port inner surface and the tube outer surface are fused and fused together. Is done. At this time, the entire body is also heated by the heating of the connection port 82, but since the sealing portion between the spherical valve body 39 and the packing 41 is provided inside the strong metal packing case 40, deformation of the body due to heat is prevented. The influence is prevented and good sealing performance can be maintained.
以上の通り本発明の合成樹脂弁の製造方法により、シ
ール性能を低下させることなく、電流を通電するだけで
容易に管と接続できる合成樹脂弁を得ることができる。As described above, according to the method for manufacturing a synthetic resin valve of the present invention, it is possible to obtain a synthetic resin valve that can be easily connected to a pipe only by passing a current without lowering the sealing performance.
第1図、第2図は本発明による製造方法の実施例を示す
縦断面図、第3図は本発明による完成品の実施例を示す
縦断面図、第4図は本発明による第2の実施例を示す縦
断面図、第5図は本発明による第3の実施例を示す縦断
面図、第6図は本発明による第3の実施例のパッキンを
示す見取図、第7図は本発明による第3の実施例の弁体
を示す見取図、第8図は従来例を示す断面図である。1 and 2 are longitudinal sectional views showing an embodiment of a manufacturing method according to the present invention, FIG. 3 is a longitudinal sectional view showing an embodiment of a finished product according to the present invention, and FIG. FIG. 5 is a longitudinal sectional view showing a third embodiment according to the present invention, FIG. 6 is a sketch showing a packing of a third embodiment according to the present invention, and FIG. 7 is a present invention. And FIG. 8 is a sectional view showing a conventional example.
Claims (3)
着したパッキンと弁体と、該弁体を回転する弁棒を有す
る弁の要部の外側へ樹脂製本体のインナー部分を成形
し、該インナー部分の外周に電熱線を巻き付け、その
後、樹脂製本体のアウター部分を該インナー部分の外側
へ成形することを特徴とする合成樹脂弁の製造方法。An inner part of a resin body is formed outside a main part of a valve having a metal packing case, a packing mounted on an inner surface of the case, a valve body, and a valve rod for rotating the valve body. A method of manufacturing a synthetic resin valve, comprising: wrapping a heating wire around an outer periphery of an inner portion, and thereafter forming an outer portion of the resin body outside the inner portion.
であり、一対の金属製パッキンケース及び弁棒を有して
いることを特徴とする合成樹脂弁の製造方法。2. A method for manufacturing a synthetic resin valve according to claim 1, wherein the valve body is spherical, and has a pair of metal packing cases and a valve rod.
フライ形であることを特徴とする合成樹脂弁の製造方
法。3. A method for manufacturing a synthetic resin valve according to claim 1, wherein said valve body is of a butterfly type.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22583388A JP2642689B2 (en) | 1988-09-09 | 1988-09-09 | Manufacturing method of synthetic resin valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22583388A JP2642689B2 (en) | 1988-09-09 | 1988-09-09 | Manufacturing method of synthetic resin valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0276980A JPH0276980A (en) | 1990-03-16 |
JP2642689B2 true JP2642689B2 (en) | 1997-08-20 |
Family
ID=16835526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22583388A Expired - Fee Related JP2642689B2 (en) | 1988-09-09 | 1988-09-09 | Manufacturing method of synthetic resin valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2642689B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6176265B1 (en) * | 1995-11-14 | 2001-01-23 | Kiyoshi Takahashi | Valve unit having an insert molded inner valve block |
DE19945960A1 (en) * | 1998-10-20 | 2000-04-27 | Plasson Armaturen Gmbh | Plastic ball valve manufacture for use as e.g. gas stop valve, produces material bond between inner section and outer casing, by melt injection welding, precluding all possibility of through-leakage between these parts |
WO2008136490A1 (en) | 2007-04-26 | 2008-11-13 | Asahi Organic Chemicals Industry Co., Ltd. | Valve manufacturing method, and valve |
-
1988
- 1988-09-09 JP JP22583388A patent/JP2642689B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0276980A (en) | 1990-03-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |