JPH0297778A - Butterfly valve and manufacture thereof - Google Patents

Butterfly valve and manufacture thereof

Info

Publication number
JPH0297778A
JPH0297778A JP25138888A JP25138888A JPH0297778A JP H0297778 A JPH0297778 A JP H0297778A JP 25138888 A JP25138888 A JP 25138888A JP 25138888 A JP25138888 A JP 25138888A JP H0297778 A JPH0297778 A JP H0297778A
Authority
JP
Japan
Prior art keywords
valve
valve body
layer
lining layer
tetrafluoroethylene 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.)
Granted
Application number
JP25138888A
Other languages
Japanese (ja)
Other versions
JPH0814330B2 (en
Inventor
Yoshinori Yurugi
義則 万木
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.)
Tomoe Technical Research Co Ltd
Original Assignee
Tomoe Technical Research 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 Tomoe Technical Research Co Ltd filed Critical Tomoe Technical Research Co Ltd
Priority to JP25138888A priority Critical patent/JPH0814330B2/en
Publication of JPH0297778A publication Critical patent/JPH0297778A/en
Publication of JPH0814330B2 publication Critical patent/JPH0814330B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Laminated Bodies (AREA)

Abstract

PURPOSE:To obtain a butterfly valve of high accuracy and high quality having a seal quality and strength by forming a lining layer of a seat ring in a valve main unit by a metal mold setting the lining layer accurately by a tetrafluoroethylene resin layer and an elastic elastomer layer. CONSTITUTION:Internal peripheral and both end surfaces of a valve main unit 1 are coated with a lining layer 5 comprising two layer structures of a tetrafluoroethylene resin layer 6 positioned in the inner side of a valve and an elastic elastomer layer 7 positioned in the outer side of the valve. The tetrafluoroethylene resin layer 6 and the elastic elastomer layer 7 are mutually adhesively attached into an integral unit, while the elastic elastomer layer 7 is firmly connected to the internal peripheral and end surfaces of the valve main unit 1. Next the lining layer 5 is formed by setting a molding metal mold to the valve main unit 1 securing valve rod guides 3, 4 and by arranging a molded object of tetrafluoroethylene resin into a predetermined shape in the metal mold further by injecting unvulcanized rubber to be vulcanized.

Description

【発明の詳細な説明】 (産業上の利用分野) この発明は、中空円筒状金属管体で形成される弁本体の
内周面を四弗化エチレン樹脂層と弾性エストラマー層の
2層からなるライニング層で被覆し、該ライニング層に
円板状の弁体外周縁が接離する弁座を一体に形成してな
るバタフライ弁及びその製造方法に関する。
Detailed Description of the Invention (Industrial Field of Application) This invention provides a valve main body formed of a hollow cylindrical metal tube whose inner circumferential surface is made of two layers: a tetrafluoroethylene resin layer and an elastic elastomer layer. The present invention relates to a butterfly valve which is integrally formed with a valve seat covered with a lining layer and on which the outer peripheral edge of a disc-shaped valve body comes into contact with and separates from the lining layer, and a method for manufacturing the butterfly valve.

(従来の技術) 従来、バタフライ弁の弁本体を、鋳造加工によって成形
し、その内周面にシートリングと称せられる弾性体製の
弁座を装着し、弁本体内に回転自在に軸支された円板状
の弁体外周縁と弁座との接離によって、弁の開閉を行う
ようにしたバタフライ弁は公知である。
(Prior art) Conventionally, the valve body of a butterfly valve is formed by casting, and a valve seat made of an elastic material called a seat ring is attached to the inner peripheral surface of the valve body, and the valve seat is rotatably supported within the valve body. Butterfly valves are known in which the valve is opened and closed by bringing the outer circumferential edge of a disc-shaped valve body into contact with and separating from the valve seat.

しかしながら、鋳造加工により成形された弁本体は5重
量があり取り扱いに不便があるため、金型を用いた成形
加工により弁本体内周面にシートリングを直接ライニン
グするには不適であった。
However, since the valve body formed by casting is heavy and inconvenient to handle, it is not suitable for directly lining the inner peripheral surface of the valve body with a seat ring by molding using a mold.

又、鋳造加工は、環境の悪化や熟練技術者の不足、加工
工程数の多さ等の種々の悪条件が相まって製品の入手が
困難であり、製品価格の上昇を招来して来ている現状に
ある。
In addition, the casting process is currently difficult to obtain due to various adverse conditions such as a deteriorating environment, a lack of skilled engineers, and a large number of processing steps, resulting in an increase in product prices. It is in.

バタフライ弁の使用条件として耐蝕性、耐薬品性を要求
される場合、シートリングを四弗化エチレン樹脂で形成
することが行われているが、四弗化エチレン樹脂は、そ
れ自身には弾性がないためにシール性向上のために如何
にして弾性を付与するかの問題があると共に、高価であ
る為経済上の観点から肉厚を出来るだけ薄くすることが
行われているが、薄肉であることによって、補強を図る
必要性がある。
When corrosion resistance and chemical resistance are required as a usage condition for butterfly valves, the seat ring is made of tetrafluoroethylene resin, but tetrafluoroethylene resin itself does not have elasticity. Because of this, there is a problem of how to add elasticity to improve sealing performance, and since it is expensive, efforts are being made to make the wall thickness as thin as possible from an economic point of view, but the wall thickness is thin. Therefore, there is a need to strengthen it.

(発明が解決しようとする課題) この発明は、従来の鋳造により弁本体を形成する場合に
存する問題と、シートリングを四弗化エチレン樹脂で形
成する場合の問題とを一挙に解決せんとするものである
(Problems to be Solved by the Invention) This invention seeks to solve all at once the problems that exist when forming the valve body by conventional casting and the problems when forming the seat ring from tetrafluoroethylene resin. It is something.

(課題を解決するための手段) 上記課題を解決するために、第1の発明が採った手段は
、軸方向に所定長さを有する中空円筒状金属管体からな
る弁本体と、該弁本体の内周面及び端面を被覆するライ
ニング層と、弁本体内に回転自在に軸支された円板状の
弁体とからなり、弁本体はその中央部に直径方向に対向
して軸孔が開口され、該開口に連通して弁棒ガイドが固
着されており、前記弁体を軸支する弁棒が弁棒ガイドに
挿通され一方の弁棒は駆動手段と連結するため弁棒ガイ
ドから外方へ延び出し、他方の弁棒は弁棒ガイド内にお
いて終端しておりライニング層はその中央部に円周方向
に延び弁体の外周縁が接離する弁座を有すると共に、四
弗化エチレン樹脂層と弾性エストラマー層とから形成し
たことを特徴とする。
(Means for Solving the Problems) In order to solve the above problems, the first invention provides a valve body made of a hollow cylindrical metal tube having a predetermined length in the axial direction; It consists of a lining layer that covers the inner circumferential surface and end surface of the valve body, and a disk-shaped valve body that is rotatably supported within the valve body. A valve stem guide is fixed in communication with the opening, and a valve stem that pivotally supports the valve body is inserted into the valve stem guide, and one valve stem is removed from the valve stem guide in order to connect with a driving means. The other valve stem extends toward the valve stem, and the other valve stem terminates within the valve stem guide. It is characterized by being formed from a resin layer and an elastic elastomer layer.

又、第2の発明は、第1の発明に係るバタフライ弁を製
造するための方法であって、予めライニング層の内面形
状と略一致する形状に成形された四弗化エチレン樹脂シ
ート成形物を金型に挿設セットした後、金型と弁本体に
その外径と軸孔に挿通される治具とにより位置を設定し
てセットし、未加硫ゴムを注入、加硫してライニング層
を形成したことを特徴とする。
Further, a second invention is a method for manufacturing the butterfly valve according to the first invention, which comprises using a tetrafluoroethylene resin sheet molded product previously molded into a shape that substantially matches the inner surface shape of the lining layer. After inserting and setting into the mold, the position is set in the mold and valve body by its outer diameter and the jig inserted into the shaft hole, and unvulcanized rubber is injected and vulcanized to form the lining layer. It is characterized by the formation of

(実施例) 以下に図面を参照しつつ、この発明の好しい実施例を詳
細に説明する0図において(1)は、バタフライ弁の弁
本体であって、中空円筒状金属管体からなり、軸方向中
心位置に直径方向に対向して軸孔(2)(2>が穿孔さ
れ、該軸孔(2)(2”)に連続して外方へ延び出す弁
棒ガイド(3)(4)が固着される。
(Example) A preferred embodiment of the present invention will be described in detail with reference to the drawings. In Figure 0, (1) is a valve body of a butterfly valve, which is made of a hollow cylindrical metal pipe body, A shaft hole (2) (2>) is bored diametrically opposite to the center position in the axial direction, and a valve stem guide (3) (4) extends outward continuously from the shaft hole (2) (2''). ) is fixed.

弁本体(1)を形成する中空円筒状金属管体は例えば市
販されている長尺の配管用鋼管を所定の長さに切断する
ことにより最も簡単に得ることが出来る。かかる配管用
鋼管は、その用途、材質の相違にかかわらず呼び径が同
一である場合、同一の外径寸法を有している為、弁本体
と配管管路との外径を一致させることが容易であり、管
路へのバタフライ弁の接続を締結バンドやジヨイント等
の簡便な接続手段を用いて行うことが出来、接続コスト
の低下や作業性の向上を図ることが出来る。
The hollow cylindrical metal pipe forming the valve body (1) can be most easily obtained, for example, by cutting a commercially available long piping steel pipe into a predetermined length. If such steel pipes have the same nominal diameter regardless of their purpose or material, they have the same outer diameter, so it is not possible to match the outer diameters of the valve body and the piping line. It is easy to connect the butterfly valve to the pipeline using a simple connection means such as a fastening band or joint, and it is possible to reduce the connection cost and improve workability.

弁棒ガイド(3)(4)は所要の直径を有する鋼管がら
なり、溶接により弁本体(1)に固着することが出来る
The valve stem guides (3) and (4) are made of steel pipes having the required diameter, and can be fixed to the valve body (1) by welding.

弁本体(1)の内周面及び両端面は、ライニング!(5
)で被覆される。ライニングN(5)は弁の内方側に位
置する四弗化エチレン樹脂層(6)と弁の外方側に位置
する弾性エラストマー層(7)の2層体からなり、四弗
化エチレン樹脂層(6)と弾性エラストマー層(7)と
は互に接着されて一体化されていると共に、弾性エラス
トマー層(7)は弁本体(1)の内周面及び端面に強固
に接合されている。
The inner peripheral surface and both end surfaces of the valve body (1) are lined! (5
) coated with The lining N (5) is composed of a two-layer body consisting of a tetrafluoroethylene resin layer (6) located on the inner side of the valve and an elastic elastomer layer (7) located on the outer side of the valve. The layer (6) and the elastic elastomer layer (7) are bonded to each other and integrated, and the elastic elastomer layer (7) is firmly bonded to the inner peripheral surface and end surface of the valve body (1). .

ライニング層(5)の内周面中央には、円周方向に環状
に延びる弁座(8)が形成される。弁座(8)は弁の中
心に向って凹んだ円弧形状に形成され該円弧の曲率はそ
こに接離する弁体(9)の外周縁の円弧の曲率と一致す
ると共に弁体(9)の外径より若干率さい内径を有し、
流体の閉止を行うために、弁体(9)が圧接状態で接触
する。
A valve seat (8) extending annularly in the circumferential direction is formed at the center of the inner peripheral surface of the lining layer (5). The valve seat (8) is formed in an arc shape concave toward the center of the valve, and the curvature of the arc matches the curvature of the outer peripheral edge of the valve body (9) that comes into contact with and leaves the valve seat (9). has an inner diameter slightly larger than the outer diameter of
In order to close the fluid, the valve body (9) is brought into pressure contact.

弁体(9)は円板形状をなし、直径方向対向位置に弁棒
(io>(tt)が固着され、外方へ延び出している。
The valve body (9) has a disk shape, and valve stems (io>(tt)) are fixed at diametrically opposed positions and extend outward.

弁棒(10)(11)は前記弁棒ガイド(3)(4)に
軸挿され、弁体(9)を弁本体(1)内で回動自在に軸
支すると共に、一方の弁棒け0)は弁棒ガイド(3)の
外端から外方へ延び出し、適宜の駆動手段を連結可能で
ある。他方の弁棒(11)は弁棒ガイド(4)内におい
て終端すると共に、該弁棒ガイド(4)の外端は蓋板(
12)で閉塞される。弁棒ガイド(3)(4’)とそこ
に軸装される弁棒(1o) (11)との間にはグラン
ドパツキン等の適宜のシール手段が配在され弁棒ガイド
と弁棒との間隙からの流体の偏波を防止している。
The valve stems (10) and (11) are inserted into the valve stem guides (3) and (4) to rotatably support the valve body (9) within the valve body (1), and one of the valve stems The shaft guide (3) extends outward from the outer end of the valve stem guide (3) and can be connected to a suitable drive means. The other valve stem (11) terminates within the valve stem guide (4), and the outer end of the valve stem guide (4) is connected to the cover plate (
12). Appropriate sealing means such as gland packing is arranged between the valve stem guides (3) (4') and the valve stems (1o) (11) mounted therein to ensure that the valve stem guide and the valve stem are connected. This prevents polarization of fluid from the gap.

図示の実施例では、弁棒は分割された2本の弁棒(10
)(11)を弁体(9)に廻り止め状態で固着したが、
−本の弁棒を弁体に貫挿し、廻り止め結合しても良いこ
とは勿論である。
In the illustrated embodiment, the valve stem is divided into two valve stems (10
) (11) was fixed to the valve body (9) with no rotation, but
-Of course, a real valve stem may be inserted through the valve body and connected to prevent rotation.

ライニング層(5)を構成する四弗化エチレン樹脂層(
6)は薄い肉厚からなり、経済性を図っていると共に、
弾性エラストマー層(7)により弾性が付与され、且強
度が補強される。かくして、ライニング層(5)はシー
ル性が向上すると共に、耐蝕性、耐薬品性が良好となる
ため、使用流体による制限が解消され、殆ど全ての流体
に適合したシートリングを有するバタフラ弁を提供する
ことが出来る。
Tetrafluoroethylene resin layer (
6) is made of thin wall thickness, aiming for economy, and
The elastic elastomer layer (7) imparts elasticity and reinforces strength. In this way, the lining layer (5) has improved sealing properties, as well as good corrosion resistance and chemical resistance, which eliminates the limitations imposed by the fluid in use and provides a butterfly valve with a seat ring that is compatible with almost all fluids. You can.

次に、第5〜11図を参照して、弁本体(1)にライニ
ング層(5)を形成する好適なる方法を説明する。
Next, a preferred method for forming the lining layer (5) on the valve body (1) will be described with reference to FIGS. 5-11.

ライニング層(5)は、弁棒ガイド(3)(4)を固着
した弁本体(1)に成型用金型をセットし、予め所定形
状に成形した四弗化エチレン樹脂の成型物を金型内に配
設し、更に未加硫ゴムを注入、加硫することによって形
成される。
The lining layer (5) is made by setting a molding die on the valve body (1) to which the valve stem guides (3) and (4) are fixed, and placing a molded product of tetrafluoroethylene resin that has been pre-molded into a predetermined shape into the mold. It is formed by disposing the rubber inside the rubber, and further injecting unvulcanized rubber and vulcanizing it.

成型用金型は、2分割された第1、第2の金型(13)
(14)と未加硫ゴム注入用金型(15)の3つの金型
からなり、第1の金型(13)は弁座(8)を成形する
ための弁座成型部(16)を上端に有する円筒部(17
)と、該円筒部(17)の下端に断面U状の溝部(18
)を介して連続するフランジ部(19)とを有し、弁座
成型部(16)には直径方向に貫通する治具挿入孔(2
0)が形成される。弁座成型部(16)は前記弁座(8
)の円弧形状に対応する円弧状の突形状に形成される。
The molding mold is divided into two parts, a first mold and a second mold (13).
(14) and an unvulcanized rubber injection mold (15), the first mold (13) has a valve seat molding part (16) for molding the valve seat (8). The cylindrical part (17
), and a groove (18) with a U-shaped cross section at the lower end of the cylindrical portion (17).
), and the valve seat molding part (16) has a jig insertion hole (2) that penetrates in the diametrical direction.
0) is formed. The valve seat molding part (16) is attached to the valve seat (8).
) is formed into an arcuate protrusion shape corresponding to the arcuate shape of ).

又、円筒部(17)は、ライニング層(5)の厚み分だ
け弁本体(1)の内径より小径の外径を有し、セットさ
れたとき弁本体(1)の内周面との間にライニング層(
5)の厚みに相当する間隙を形成する6溝部(18)は
弁本体(1)の端面(1a)からライニング層(5)の
厚み分に相当する間隙を形成し得る深さを有し、これに
連続するフランジ(19)の内径は弁本体(1)の外径
に一致し、フランジ(19)が弁本体(1)の端部外周
に挿嵌されるとき、第1の金型(13)は弁本体(1)
に対して直径方向のガタを生ずることなくセットされる
Moreover, the cylindrical part (17) has an outer diameter smaller than the inner diameter of the valve body (1) by the thickness of the lining layer (5), and when set, there is a gap between it and the inner peripheral surface of the valve body (1). Lining layer (
The six grooves (18) forming a gap corresponding to the thickness of the valve body (1) have a depth capable of forming a gap corresponding to the thickness of the lining layer (5) from the end surface (1a) of the valve body (1), The inner diameter of the flange (19) that is continuous with this corresponds to the outer diameter of the valve body (1), and when the flange (19) is inserted into the outer circumference of the end of the valve body (1), the first mold ( 13) is the valve body (1)
It is set without any play in the diametrical direction.

第2の金型(14)は、前記第1の金型(13)の上面
に積み重ねられる円筒部(Zl)と、該円筒部(zl)
の上端に断面口状の溝部(22)を介して連続するフラ
ンジ部(23)とを備え、円筒部(21)、溝部(22
)並びにフランジ部(23)は前記第1の金型のそれぞ
れと同一の構造をなし、同一の作用を有する。第2の金
型〈14)は、更に溝部(22)に開孔し、未加硫ゴム
を注入し得る複数の注入孔(24)が円周方向に沿って
形成される。
The second mold (14) includes a cylindrical part (Zl) that is stacked on the top surface of the first mold (13), and a cylindrical part (Zl) that is stacked on the top surface of the first mold (13).
It has a flange part (23) continuous to the upper end via a groove part (22) having a cross-sectional opening shape, and has a cylindrical part (21) and a groove part (22).
) and the flange portion (23) have the same structure and the same function as the first mold. The second mold (14) is further opened in the groove (22), and a plurality of injection holes (24) through which unvulcanized rubber can be injected are formed along the circumferential direction.

注入用金型(15)は第2の金型(14)に嵌合され、
前記注入孔(24)に未加硫ゴムを導入するための金型
であって、中央部に外部の未加硫ゴム注入装置に接続す
る注入口(25)を有し、該注入口(25)から注入通
路(26)が延び出し、前記第2の金型(14)の注入
孔(24)に連通ずる。
The injection mold (15) is fitted into the second mold (14),
The mold is for introducing unvulcanized rubber into the injection hole (24), and has an injection port (25) in the center that connects to an external unvulcanized rubber injection device. ) from which an injection passage (26) extends and communicates with the injection hole (24) of the second mold (14).

(27)は治具であって弁棒(10)(11)と同径の
棒形状をなし、弁棒ガイド(3)(4)から第1の金型
(13)の治具挿入孔(20)に挿入して、第1の金型
(13)を弁本体(1)に対して軸方向の位置に正確に
設定する。
(27) is a jig, which has a rod shape with the same diameter as the valve stems (10) and (11), and extends from the valve stem guides (3) and (4) to the jig insertion hole ( 20) to accurately set the first mold (13) in the axial position relative to the valve body (1).

かくして、弁本体(1)にセットされた第1の金型(1
3)は治具の挿入により軸方向に位置決めが達成され、
又フランジ部(19)と弁本体(1)との嵌合により直
径方向の位置決めが達成される。
In this way, the first mold (1) set in the valve body (1)
3) Positioning is achieved in the axial direction by inserting a jig,
Further, diametrical positioning is achieved by fitting the flange portion (19) and the valve body (1).

(28)は薄い四弗化エチレン樹脂シートからなる成形
物であって、ライニング層(5)の四弗化エチレン樹脂
層(6)に略相応する形状を有する。すなわち、弁本体
(1)の内周面形状に対応する円筒部(29)と該円筒
部(29)の中央に位置し、弁座(8)の形状に対応す
る弁座対応部(30)、並びに両端のフランジ部(31
)とを有し、弁座対応部(30)には軸孔(2)に相応
する開口(32)が形成されると共に、該開口(32)
からリング(33)が外方へ延び出している。
(28) is a molded article made of a thin tetrafluoroethylene resin sheet, and has a shape approximately corresponding to the tetrafluoroethylene resin layer (6) of the lining layer (5). That is, a cylindrical part (29) corresponding to the shape of the inner peripheral surface of the valve body (1) and a valve seat corresponding part (30) located at the center of the cylindrical part (29) and corresponding to the shape of the valve seat (8). , as well as the flanges at both ends (31
), an opening (32) corresponding to the shaft hole (2) is formed in the valve seat corresponding part (30), and the opening (32)
A ring (33) extends outward.

該リング(33)はライニング層(5)の弾性エラスト
マー層(7)の厚みに対応した長さを有しており、成形
された状態において、挿通された弁棒(10)(11)
は四弗化エチレン樹脂層(6)に接触することとなり、
直接弾性エラストマー層(7)が弁棒(20)(11)
に接触しないようにしている。
The ring (33) has a length corresponding to the thickness of the elastic elastomer layer (7) of the lining layer (5), and in the molded state, the inserted valve stem (10) (11)
comes into contact with the tetrafluoroethylene resin layer (6),
The elastic elastomer layer (7) directly covers the valve stem (20) (11)
I try not to come into contact with it.

四弗化エチレン樹脂シート成形物(28)は、ライニン
グ層(5)の内周面形状に略一致した形状に形成されて
おり、未加硫ゴムの注入工程時に、第1、第2金型(1
3) (14)の外周に嵌められ、注入された未加硫ゴ
ムを一体化されてライニング層(5)を形成する。
The tetrafluoroethylene resin sheet molded product (28) is formed in a shape that approximately matches the shape of the inner peripheral surface of the lining layer (5), and is inserted into the first and second molds during the unvulcanized rubber injection process. (1
3) The lining layer (5) is formed by fitting the outer periphery of (14) and integrating the injected unvulcanized rubber.

四弗化エチレン樹脂シートは常温では硬質であるが、加
熱されるとき柔軟化して第1、第2金型(13) (1
4)の形状になじみ、正確な形状に成形される。したが
って、成形物(28)は予め精確な形状に成形しておく
必要はない。
The tetrafluoroethylene resin sheet is hard at room temperature, but becomes flexible when heated, forming the first and second molds (13) (1
It conforms to the shape of 4) and is molded into an accurate shape. Therefore, the molded article (28) does not need to be molded into a precise shape in advance.

第7図を参照して、四弗化エチレン樹脂シート成形物(
28)を挿着セットした第1の金型(13)のフランジ
部(19)に弁本体(1)を嵌挿し、治具(27)を弁
棒ガイド(3)(4)から治具挿入孔(20)に挿入し
て、弁本体(1)を第1の金具(13)にセットする。
Referring to FIG. 7, the tetrafluoroethylene resin sheet molded product (
28) into the flange part (19) of the first mold (13), and insert the jig (27) through the valve stem guides (3) and (4). The valve body (1) is inserted into the hole (20) and set in the first metal fitting (13).

この場合、四弗化エチレン樹脂シート成形物(28)は
弁本体(1)の内方に位置する。次に、第2の金型(1
4)を四弗化エチレン樹脂シート成形物(28)内に挿
入しつつ、第1の金型(13)上に積み重ね、フランジ
部(23)を弁本体(1)の端部に嵌合して、第2の金
型(14)をセットする。最後に、注入孔(24)を注
入通路(26)を整合しつつ、注入用金型(15)を第
2の金型(14)の上部に嵌合してセットする。
In this case, the tetrafluoroethylene resin sheet molded product (28) is located inside the valve body (1). Next, the second mold (1
4) is stacked on the first mold (13) while inserting it into the tetrafluoroethylene resin sheet molded product (28), and the flange portion (23) is fitted to the end of the valve body (1). Then, set the second mold (14). Finally, the injection mold (15) is fitted and set on the upper part of the second mold (14) while aligning the injection hole (24) with the injection passage (26).

このようにして、3つの金型(13) (14)(15
)をセットした後、注入口(25)から未加硫ゴムを注
入する。
In this way, three molds (13) (14) (15
), then inject unvulcanized rubber from the injection port (25).

注入された未加硫ゴムは、第8図に示すように注入通路
(26)、注入孔(24)を介して、第1、第2金型(
13) (14)の外周面に挿着された四弗化エチレン
樹脂シート成形物(28)と弁本体(1)の内周面との
間の間隙に注入されそこを満たす。注入により、第10
.11図に示すように、内部の空気はフランジ部(19
)と弁本体(1)との間隙から外部へ排気され、更に未
加硫ゴムの流出により注入完了を知る。注入後、注入用
金型(15)を取り外し、加熱して加硫を進める。加硫
完了後、第2の金型(15)を上方へ抜き去り、治具(
27)を抜き取った後、弁本体(1)を第1の金型(1
3)から取り出し、注入孔(24)部分のゴムを除去し
て、完成品を得る。
The injected unvulcanized rubber passes through the injection passage (26) and injection hole (24) into the first and second molds (as shown in FIG. 8).
13) It is injected into the gap between the molded tetrafluoroethylene resin sheet (28) inserted on the outer circumferential surface of (14) and the inner circumferential surface of the valve body (1) to fill it. By injection, the 10th
.. As shown in Figure 11, the internal air flows through the flange part (19
) and the valve body (1) to the outside, and the completion of injection is known by the outflow of unvulcanized rubber. After injection, the injection mold (15) is removed and heated to advance vulcanization. After vulcanization is completed, the second mold (15) is pulled out upwards and the jig (
27), the valve body (1) is placed in the first mold (1).
3) and remove the rubber from the injection hole (24) to obtain a finished product.

加硫により、四弗化エチレン樹脂シート成形物(28)
は柔軟化して所定の形状に整形され、注入された未加硫
ゴムと結合し一体化して、弁本体(1)の内周面及び端
面を被覆するライニング層(5)となり、弁本体(1)
に結合、一体止される。
By vulcanization, a tetrafluoroethylene resin sheet molded product (28)
is softened and shaped into a predetermined shape, and is combined and integrated with the injected unvulcanized rubber to form a lining layer (5) that covers the inner peripheral surface and end surface of the valve body (1). )
It is combined and fixed together.

四弗化エチレン樹脂シート成形物(28)と弾性エラス
トマーとの接合をもたらすために、成形物(28)の外
周面に接着剤を塗布すると共に、弁本体(1)の内周面
及び端面に接着剤を塗布し、弾性エラストマーと弁本体
(1)との接着を図る。又、金型(13)(14)の内
外面には離型剤を塗布し、弾性エラストマーが接着する
のを防止する。
In order to bond the tetrafluoroethylene resin sheet molded product (28) and the elastic elastomer, an adhesive is applied to the outer peripheral surface of the molded product (28), and an adhesive is applied to the inner peripheral surface and end surface of the valve body (1). Apply adhesive to bond the elastic elastomer and the valve body (1). Furthermore, a mold release agent is applied to the inner and outer surfaces of the molds (13) and (14) to prevent the elastic elastomer from adhering.

〈作用) 弾性エラストマー層を介して四弗化エチレン樹脂層で金
属製の弁本体内周面を被覆するようにしであるので、親
和性及び接着性が悪い金属と四弗化エチレン樹脂とを強
固に接合することが出来ると共に、形成されたライニン
グ層は四弗化エチレン樹脂により耐触性、耐薬品性が向
上すると共に、四弗化エチレン樹脂は弾性エラストマー
により弾性が付与され、且補強されるため、シール性の
向上を図ることが出来、高価な四弗化エチレン樹脂層の
肉厚を薄く出来る結果、コストの低下も期待出来る。
(Function) Since the inner peripheral surface of the metal valve body is coated with the tetrafluoroethylene resin layer via the elastic elastomer layer, the metal and the tetrafluoroethylene resin, which have poor affinity and adhesion, are strengthened. In addition, the formed lining layer has improved contact resistance and chemical resistance due to the tetrafluoroethylene resin, and the tetrafluoroethylene resin is imparted with elasticity and reinforced by the elastic elastomer. Therefore, the sealing performance can be improved, and the thickness of the expensive tetrafluoroethylene resin layer can be made thinner, so that a reduction in cost can be expected.

又、ライニング層は、金型を用いて成形出来るため、成
形が容易で製造コストの節減を図ることが可能となると
共に、金型は弁本体に嵌挿されるフランジ部により直径
方向の位置が設定され、治具の使用により軸方向の位置
が設定され、精確に弁本体に対してセット出来る結果、
成形されるライニング層はきわめて寸法精度が高く高品
質の製品を製造することが可能となる。
In addition, since the lining layer can be molded using a mold, molding is easy and manufacturing costs can be reduced, and the diametrical position of the mold can be set by the flange that is inserted into the valve body. The axial position is set by using a jig, and as a result, it can be set accurately against the valve body.
The molded lining layer has extremely high dimensional accuracy, making it possible to manufacture high-quality products.

(発明の効果) この発明によれば、弁本体を鋼管の如き中空円筒状金g
管体で形成するので、製造が簡単でコス1〜の低下を図
り得ると共に、配管パイプと同径の弁本体とすることが
出来るため、配管パイプとの接続を締結バンドやジヨイ
ントの如き簡便な接続手段により行うことが出来る。
(Effect of the invention) According to this invention, the valve body is made of hollow cylindrical metal g
Since it is formed from a pipe body, it is easy to manufacture and the cost can be reduced by 1 or more, and since the valve body can have the same diameter as the piping, it can be connected to the piping using a simple method such as a fastening band or joint. This can be done by means of connection.

弁本体のシートリングを構成するライニング層が四弗化
エチレン樹脂層と弾性エラストマー層とからなり、耐薬
品性、耐蝕性が高いと共に良好なシール性及び充分な強
度を有しているため、きわめて広範囲の使用条件に対応
することが可能となる。
The lining layer that makes up the seat ring of the valve body is composed of a tetrafluoroethylene resin layer and an elastic elastomer layer, and has high chemical resistance and corrosion resistance, good sealing performance, and sufficient strength, making it extremely durable. It becomes possible to correspond to a wide range of usage conditions.

また、ライニング層は、弁本体の外径と軸孔位置とによ
って正確にセットされる金型を用いて成形されるため、
寸法精度が高く高品質の製品を提供出来る。
In addition, since the lining layer is molded using a mold that is precisely set according to the outer diameter of the valve body and the position of the shaft hole,
We can provide high quality products with high dimensional accuracy.

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

第1図は一部を切り欠いた斜視図、第2図は縦断面図、
第3図は弁本体と弁棒ガイドの正面図、第4図は第3図
IV−IV線に沿った縦断面図、第5図は金型のセット
状態を示す外観斜視図、第6図は分解斜視図、第7図は
セット状態の縦断面図、第8図は未加硫ゴムの注入状態
を示す縦断面図、第9図は注入経路を示す斜視図、第1
0.11図は排気状態を示す一部の拡大断面図である。 (1)・・・弁本体    (2)・・・軸孔(3)・
・・弁棒ガイド  (4)・・・弁棒ガイド(5)・・
・ライニング層 (6)・・・四弗化エチレン樹脂層 (7)・・・弾性エラストマー層 (8)・・弁座     (9)・・・弁体(11)・
・・弁棒   (12)・・・蓋体・・第1の金型  
(14)・・・第2の金型・・・注入用金型  (16
)・・・弁座成型部・・・円筒部    (18)・・
・溝部・・・フランジ部  (20)・・・治具挿入孔
・円筒部    (22)・・・溝部 ・・・フランジ部  (24)・・・注入孔・・・注入
口    (26)・・・注入通路・・・治具 ・・・四弗化エチレン樹脂シート成形物・・・円筒部 
   (30)・・・弁座対応部・・・フランジ部  
(32)・・・開口・・・リング
Figure 1 is a partially cutaway perspective view, Figure 2 is a vertical sectional view,
Fig. 3 is a front view of the valve body and valve stem guide, Fig. 4 is a vertical sectional view taken along the line IV-IV in Fig. 3, Fig. 5 is an external perspective view showing the set state of the mold, and Fig. 6 7 is an exploded perspective view, FIG. 7 is a vertical cross-sectional view of the set state, FIG. 8 is a vertical cross-sectional view showing the unvulcanized rubber injection state, FIG. 9 is a perspective view showing the injection route,
Figure 0.11 is a partially enlarged sectional view showing the exhaust state. (1)... Valve body (2)... Shaft hole (3)
...Valve stem guide (4)...Valve stem guide (5)...
・Lining layer (6)...Tetrafluoroethylene resin layer (7)...Elastic elastomer layer (8)...Valve seat (9)...Valve body (11)...
... Valve stem (12) ... Lid body ... First mold
(14)...Second mold...Injection mold (16)
)...Valve seat molding part...Cylindrical part (18)...
・Groove section...Flange section (20)...Jig insertion hole/Cylinder section (22)...Groove section...Flange section (24)...Injection hole...Injection port (26)...・Injection passage...Jig...Tetrafluoroethylene resin sheet molded product...Cylindrical part
(30) Valve seat corresponding part... Flange part
(32)...Opening...Ring

Claims (2)

【特許請求の範囲】[Claims] (1)軸方向に所定長さを有する中空円筒状金属管体か
らなる弁本体と、該弁本体の内周面及び端面を被覆する
ライニング層と、弁本体内に回転自在に軸支された円板
状の弁体とからなり、弁本体はその中央部に直径方向に
対向して軸孔が開口され、該開口に連通して弁棒ガイド
が固着されており、前記弁体を軸支する弁棒が弁棒ガイ
ドに挿通され一方の弁棒は駆動手段と連結するため弁棒
ガイドから外方へ延び出し、他方の弁棒は弁棒ガイド内
において終端しておりライニング層はその中央部に円周
方向に延び弁体の外周縁が接離する弁座を有すると共に
、四弗化エチレン樹脂層と弾性エストラマー層とから形
成されていることを特徴とするバタフライ弁。
(1) A valve body consisting of a hollow cylindrical metal tube having a predetermined length in the axial direction, a lining layer covering the inner peripheral surface and end face of the valve body, and a lining layer rotatably supported within the valve body. The valve body is composed of a disk-shaped valve body, and a shaft hole is opened in the center of the valve body, facing each other in the diametrical direction. The valve stems are inserted through the valve stem guide, one valve stem extending outwardly from the valve stem guide for connection with the drive means, the other valve stem terminating within the valve stem guide, and the lining layer is located in the center of the valve stem guide. 1. A butterfly valve comprising a valve seat extending in the circumferential direction and on which the outer peripheral edge of the valve body comes into contact with and separating from the valve seat, and comprising a tetrafluoroethylene resin layer and an elastic elastomer layer.
(2)予めライニング層の内面形状と略一致する形状に
成形された四弗化エチレン樹脂シート成形物を金型に挿
設セットした後、金型と弁本体にその外径と軸孔に挿通
される治具とにより位置を設定してセットし、未加硫ゴ
ムを注入、加硫してライニング層を形成するようにした
ことを特徴とする第1項記載のバタフライ弁を製造する
ための方法。
(2) After inserting and setting a tetrafluoroethylene resin sheet molded product in advance into a mold that roughly matches the inner shape of the lining layer, it is inserted into the mold and valve body through its outer diameter and shaft hole. For manufacturing the butterfly valve according to item 1, the butterfly valve is set by setting the position using a jig, and then injecting and vulcanizing unvulcanized rubber to form a lining layer. Method.
JP25138888A 1988-10-05 1988-10-05 Butterfly valve and method of manufacturing the same Expired - Lifetime JPH0814330B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25138888A JPH0814330B2 (en) 1988-10-05 1988-10-05 Butterfly valve and method of manufacturing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25138888A JPH0814330B2 (en) 1988-10-05 1988-10-05 Butterfly valve and method of manufacturing the same

Publications (2)

Publication Number Publication Date
JPH0297778A true JPH0297778A (en) 1990-04-10
JPH0814330B2 JPH0814330B2 (en) 1996-02-14

Family

ID=17222100

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25138888A Expired - Lifetime JPH0814330B2 (en) 1988-10-05 1988-10-05 Butterfly valve and method of manufacturing the same

Country Status (1)

Country Link
JP (1) JPH0814330B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07151256A (en) * 1993-12-01 1995-06-13 Takasago Thermal Eng Co Ltd Erosionproof valve
EP0658417A2 (en) * 1993-12-19 1995-06-21 Keramchemie GmbH Method for corrosion resistant lining of a metal article
JPH0828749A (en) * 1994-07-22 1996-02-02 Kubota Corp Lining structure for fluid equipment
JP2011144928A (en) * 2011-02-03 2011-07-28 Maezawa Ind Inc Rubber lining forming method for butterfly valve
WO2018150821A1 (en) * 2017-02-17 2018-08-23 日立オートモティブシステムズ株式会社 Valve device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07151256A (en) * 1993-12-01 1995-06-13 Takasago Thermal Eng Co Ltd Erosionproof valve
EP0658417A2 (en) * 1993-12-19 1995-06-21 Keramchemie GmbH Method for corrosion resistant lining of a metal article
EP0658417A3 (en) * 1993-12-19 1996-01-24 Gewerk Keramchemie Method for corrosion resistant lining of a metal article.
JPH0828749A (en) * 1994-07-22 1996-02-02 Kubota Corp Lining structure for fluid equipment
JP2011144928A (en) * 2011-02-03 2011-07-28 Maezawa Ind Inc Rubber lining forming method for butterfly valve
WO2018150821A1 (en) * 2017-02-17 2018-08-23 日立オートモティブシステムズ株式会社 Valve device
JPWO2018150821A1 (en) * 2017-02-17 2019-11-07 日立オートモティブシステムズ株式会社 Valve device

Also Published As

Publication number Publication date
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