JPH0579136U - Ball valve with built-in check valve - Google Patents

Ball valve with built-in check valve

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Publication number
JPH0579136U
JPH0579136U JP2597392U JP2597392U JPH0579136U JP H0579136 U JPH0579136 U JP H0579136U JP 2597392 U JP2597392 U JP 2597392U JP 2597392 U JP2597392 U JP 2597392U JP H0579136 U JPH0579136 U JP H0579136U
Authority
JP
Japan
Prior art keywords
valve
insert
ball
downstream
check valve
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
JP2597392U
Other languages
Japanese (ja)
Inventor
秀夫 田村
優 野口
Original Assignee
日立バルブ株式会社
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 日立バルブ株式会社 filed Critical 日立バルブ株式会社
Priority to JP2597392U priority Critical patent/JPH0579136U/en
Publication of JPH0579136U publication Critical patent/JPH0579136U/en
Pending legal-status Critical Current

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Abstract

(57)【要約】 【目的】インサートの組付け作業の作業性が良く、イン
サートの弁座面とボデーのねじ山とを損傷するおそれが
なく、また安価な逆止弁内蔵ボール弁を提供する。 【構成】上流側に配置したボデー1段1の弁室に上流側
より順に上流側シート3aとボール4とを装着し、ボー
ル4の頂部にボデー1段を貫通した弁棒5の下端を係止
し、下流側に配置したボデー2段2の孔に上流側より順
に下流側シート3bとインサート8とばね抑え9とを装
着し、ばね抑え9の下流側への移動を阻止する段差面2
bを前記孔に形成し、インサート8とばね抑え9との間
にインサートの下流側端面に形成した弁座面8aに着座
する逆止弁体10と該逆止弁体10をインサート側に押
圧するコイルばね11とを装着し、ボデー1段1の下流
側内面とボデー2段2の上流側外面とを螺着して両シー
ト3a,3bによってボール4を挟持したことを特徴と
する。
(57) [Summary] [Purpose] To provide a ball valve with a built-in check valve that has good workability in the assembly work of the insert, does not damage the valve seat surface of the insert and the threads of the body, and is inexpensive. .. [Structure] An upstream seat 3a and a ball 4 are mounted in this order from the upstream side to a valve chamber of a first-stage body 1 arranged on the upstream side, and the lower end of a valve rod 5 that penetrates the first-stage body is attached to the top of the ball 4. The stepped surface 2 for stopping the movement of the spring retainer 9 to the downstream side by mounting the downstream seat 3b, the insert 8 and the spring retainer 9 in order from the upstream side in the holes of the body 2 step 2 arranged on the downstream side.
b is formed in the hole, and the check valve body 10 is seated on the valve seat surface 8a formed on the downstream end face of the insert between the insert 8 and the spring retainer 9 and the check valve body 10 is pressed to the insert side. The coil spring 11 is attached, and the inner surface of the downstream side of the first stage 1 of the body and the outer surface of the upstream side of the second stage 2 of the body are screwed together to sandwich the ball 4 between the seats 3a and 3b.

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業上の利用分野】[Industrial applications]

本考案は主に水、油、ガス等を通過させる配管中、特に逆流防止機能を設けた ボール弁に関するものである。 The present invention mainly relates to a ball valve provided with a backflow prevention function in a pipe through which water, oil, gas, etc. pass.

【0002】[0002]

【従来の技術】[Prior Art]

従来、水、油、ガス等の流体の逆流防止を必要とする配管には、開閉用の玉形 弁、ボール弁等のほかに、逆止用のリフト逆止弁やスイング逆止弁を直列に配す るのが通常である。しかし、このように開閉用の弁と逆止用の弁とを直列に配す ると、工事費及び器材費が高くなり、また配管スペースも広く必要となるなどの 欠点があった。このため、開閉機能と逆止機能とを兼ね備えたバルブが強く望ま れていた。このような要望に応えるために図2に示すようなボール弁と逆止弁を 併用したボールバルブが提供されている。 すなわち図2に示した従来の逆止弁内蔵ボール弁は、上流側に配置した弁箱2 0の弁室に上流側より順に上流側シート21aとボール22と下流側シート21 bとを装着し、ボール22の頂部に弁箱20を貫通した弁棒23の下端を係止し 、弁箱20の下流側にめねじ20aを設け、該めねじ20aに下流側シート21 bを上流側に押圧するインサート24を螺着して両シート21a,21bによっ てボール22を挟持し、前記めねじ20aにキャップ25を螺着し、該キャップ 25の内面にガイドリング26を係止し、該ガイドリング26によってインサー ト24の下流側端面に形成した弁座面24aに着座する逆止弁体27を案内し、 ガイドリング26と逆止弁体27との間に逆止弁体27をインサート24側に押 圧するコイルばね28を装着した逆止弁内蔵ボール弁である。 Conventionally, for piping that requires backflow prevention of fluids such as water, oil, gas, etc., a lift check valve and a swing check valve for check are connected in series in addition to a valve for opening and closing, a ball valve, etc. It is usually placed in However, arranging the valve for opening and closing and the valve for check in series in this way has drawbacks such as high construction cost and equipment cost, and a wide piping space. Therefore, a valve that has both an opening and closing function and a check function has been strongly desired. In order to meet such a demand, there is provided a ball valve using a ball valve and a check valve together as shown in FIG. That is, in the conventional ball valve with a built-in check valve shown in FIG. 2, the upstream side seat 21a, the ball 22 and the downstream side seat 21b are mounted in this order from the upstream side in the valve chamber of the valve box 20 arranged on the upstream side. , The lower end of the valve rod 23 penetrating the valve box 20 is locked to the top of the ball 22, the female thread 20a is provided on the downstream side of the valve box 20, and the downstream seat 21b is pressed to the upstream side of the female thread 20a. The insert 24 is screwed to hold the ball 22 between the seats 21a and 21b, the cap 25 is screwed to the female screw 20a, and the guide ring 26 is locked to the inner surface of the cap 25. The ring 26 guides the check valve body 27 seated on the valve seat surface 24a formed on the downstream end surface of the insert 24, and the check valve body 27 is inserted between the guide ring 26 and the check valve body 27. Coil that pushes side 28 is a check valve built-in ball valve equipped with.

【0003】[0003]

【考案が解決しようとする課題】[Problems to be solved by the device]

上記従来の逆止弁内蔵ボール弁では、インサート24の組付けは締付治具によ ってインサート24を弁箱のめねじ20aに螺着することによって行なうから、 インサート24の固定の作業性が悪いという問題点がある。また締付治具によっ てインサート24を弁箱に組付ける際に、締付治具によってインサートの弁座面 24aを損傷させるおそれがある。更に弁箱のめねじ20aにはインサート24 のほかキャップ25も螺着されるから、締付治具によってインサート24を組付 ける際に、締付治具によってキャップ25が螺着される部分のめねじ20aを損 傷させるおそれもある。 これらの問題点を解決するためにインサート24とキャップ25とを一体に形 成する場合もあるが、その場合にはキャップ25に弁座面24aを形成すること となるから、キャップ25を鉄系材料によって製造するときには弁座面24aに 表面処理を施す必要を生じ、表面処理を省略しようとすれば材料変更を余儀なく され、いずれにしろ原価高となる。更に鋳物でキャップ25を製作する場合には 肉厚が不均一になり、クサレ等の鋳造不良が発生しやすく、高価になる。 したがって本考案は、インサートの組付け作業の作業性が良く、インサートの 弁座面とボデーのねじ山とを損傷するおそれがなく、また安価な逆止弁内蔵ボー ル弁を提供することを目的とする。 In the above-mentioned conventional ball valve with built-in check valve, the assembly of the insert 24 is performed by screwing the insert 24 to the female screw 20a of the valve box with a tightening jig. There is a problem that is bad. Further, when the insert 24 is assembled to the valve box by the tightening jig, the valve seat surface 24a of the insert may be damaged by the tightening jig. Further, the cap 25 is screwed onto the female screw 20a of the valve box in addition to the insert 24. Therefore, when the insert 24 is assembled by the tightening jig, the cap 25 is screwed on by the tightening jig. The internal thread 20a may be damaged. In order to solve these problems, the insert 24 and the cap 25 may be integrally formed. In that case, the valve seat surface 24a is formed on the cap 25. When manufacturing with a material, it is necessary to perform a surface treatment on the valve seat surface 24a, and if the surface treatment is omitted, the material must be changed and the cost is increased in any case. Further, when the cap 25 is manufactured by casting, the wall thickness becomes non-uniform, casting defects such as scrape are likely to occur, and it becomes expensive. Therefore, it is an object of the present invention to provide a ball valve with a built-in check valve, which has good workability in assembling the insert, does not damage the valve seat surface of the insert and the thread of the body, and is inexpensive. And

【0004】[0004]

【課題を解決するための手段】[Means for Solving the Problems]

本考案は、上流側に配置したボデー1段の弁室に上流側より順に上流側シート とボールとを装着し、該ボールの頂部に前記ボデー1段を貫通した弁棒の下端を 係止し、下流側に配置したボデー2段の孔に上流側より順に下流側シートとイン サートとばね抑えとを装着し、該ばね抑えの下流側への移動を阻止する段差面を 前記孔に形成し、前記インサートと前記ばね抑えとの間にインサートの下流側端 面に形成した弁座面に着座する逆止弁体と該逆止弁体を前記インサート側に押圧 するコイルばねとを装着し、前記ボデー1段の下流側内面とボデー2段の上流側 外面とを螺着して前記両シートによって前記ボールを挟持した逆止弁内蔵ボール 弁によって、上記目的を達成したものである。 According to the present invention, an upstream seat and a ball are mounted in this order from the upstream side to a valve chamber of a first-stage body arranged on the upstream side, and the lower end of a valve rod penetrating the first-stage body is locked to the top of the ball. , A downstream seat, an insert, and a spring retainer are installed in order from the upstream side in the holes of two stages of the body arranged on the downstream side, and a step surface for preventing the spring retainer from moving to the downstream side is formed in the hole. A check valve body seated on a valve seat surface formed on the downstream end face of the insert between the insert and the spring retainer, and a coil spring for pressing the check valve body toward the insert side, The above object is achieved by a ball valve with a built-in check valve, in which the downstream inner surface of the first body and the upstream outer surface of the second body are screwed together to sandwich the ball between the seats.

【0005】[0005]

【実施例】【Example】

本考案による一実施例を図面により説明する。図1は本実施例の縦断面図であ る。図1において、ボデー1段1は入口側配管接続部1aを有し、ボデー1段1 の弁室には上流側(図面右側)より順に上流側シート3aとボール4とが装着さ れており、ボール4には流路4aが形成されており、ボール4の頂部にはボデー 1段1を貫通した弁棒5の下端が係合しており、弁棒5の上端にはハンドル6が 取付けられている。ボデー1段1の下流側(図面左側)にはめねじが形成されて おり、該めねじに出口側配管接続部2aを有するボデー2段2のおねじがガスケ ット7を介してねじ接合されている。 ボデー2段2の孔には上流側より順に下流側シート3bとインサート8とばね 抑え9が装着されている。インサート8は流路を有し、下流側端面には逆止用の 弁座面8aが形成されており、外周面にはOリング8bを保有している。ばね抑 え9は断面ほぼ2段U字状の椀状に形成され、中央部に流路を有し、外周には外 方に突出する鍔が形成されており、この鍔の下流側方向への移動を阻止するよう に、ボデー2段2の孔に段差面2bが形成されており、したがってボデー1段と ボデー2段とを螺着すると、ボール4は両シート3a,3bによって挟持される 。インサート8とばね抑え9との間には、インサートに形成した弁座面8aに着 座しばね抑え9によって案内される逆止弁体10と、該逆止弁体10をインサー ト8側に押圧するコイルばね11とが装着されている。 An embodiment according to the present invention will be described with reference to the drawings. FIG. 1 is a vertical sectional view of this embodiment. In FIG. 1, the body 1st stage 1 has an inlet side pipe connecting portion 1a, and the valve chamber of the body 1st stage 1 is equipped with an upstream seat 3a and a ball 4 in order from the upstream side (right side in the drawing). , The ball 4 is formed with a flow path 4a, the lower end of the valve rod 5 penetrating the first stage 1 of the body is engaged with the top of the ball 4, and the handle 6 is attached to the upper end of the valve rod 5. Has been. A female screw is formed on the downstream side (left side in the drawing) of the first stage 1 of the body, and a male screw of the second stage 2 having the outlet side pipe connecting portion 2a is screwed to the female screw via a gasket 7. ing. Downstream seats 3b, inserts 8 and spring retainers 9 are attached to the holes of the second body 2 in order from the upstream side. The insert 8 has a flow path, a check valve seat surface 8a is formed on the downstream end surface, and an O-ring 8b is held on the outer peripheral surface. The spring retainer 9 is formed in a bowl shape with a U-shaped cross section, and has a flow path in the center, and a flange projecting outward is formed on the outer periphery. The stepped surface 2b is formed in the hole of the body 2 step 2 so as to prevent the movement of the body 2. Therefore, when the body 1 step and the body 2 step are screwed, the ball 4 is sandwiched by both seats 3a, 3b. .. Between the insert 8 and the spring retainer 9, a check valve body 10 which is seated on a valve seat surface 8a formed on the insert and guided by the spring retainer 9, and the check valve body 10 is provided on the insert 8 side. A coil spring 11 for pressing is attached.

【0006】 本実施例は以上のように構成されており、ハンドル6を図1の状態より90° 回転すると、弁棒5を介してボール4も図1の状態より90°回転して入口側配 管接続部1aと出口側配管接続部2aとの間の流路は遮断される。他方図1の状 態において、入口側配管接続部1aから出口側配管接続部2aに向って流体が流 れようとするときには、流体はコイルばね11の押圧力に抗して逆止弁体10を 下流側に押し出し、したがって流体は流れることができるが、出口側配管接続部 2aから入口側配管接続部1aに向って流体が流れようとするときには、コイル ばね11は逆止弁体10を押圧してインサートに形成した弁座面8aに着座させ 、したがって流体は流れることができない。This embodiment is configured as described above, and when the handle 6 is rotated 90 ° from the state shown in FIG. 1, the ball 4 is also rotated 90 ° from the state shown in FIG. The flow path between the pipe connecting portion 1a and the outlet side pipe connecting portion 2a is blocked. On the other hand, in the state of FIG. 1, when the fluid is about to flow from the inlet side pipe connecting portion 1a toward the outlet side pipe connecting portion 2a, the fluid resists the pressing force of the coil spring 11 and the check valve body 10 is pressed. Is pushed to the downstream side, so that the fluid can flow, but when the fluid tries to flow from the outlet side pipe connecting portion 2a toward the inlet side pipe connecting portion 1a, the coil spring 11 presses the check valve body 10. Then, the valve seat surface 8a formed on the insert is seated, so that the fluid cannot flow.

【0007】 しかして本実施例ではインサート8はボデー2段2の孔に装着されているが螺 着されてはいないから、インサート8の組付け作業は容易である。またインサー ト8を螺着していないために、ボデー2段にインサート8を装着する際にインサ ートの弁座面8aを損傷させることもないし、また両ボデー1,2の螺着面のね じ山を損傷することもない。また、ボデー2段2を鋳物で製作する場合にも肉厚 が均一になり、クサレ等の鋳造不良がなくなり、かつ、鉄系の材料でも、内面に 表面処理をしなくてもそのまま使用可能である。However, in this embodiment, the insert 8 is mounted in the hole of the second stage 2 of the body but not screwed, so that the assembling work of the insert 8 is easy. Further, since the insert 8 is not screwed, the valve seat surface 8a of the insert is not damaged when the insert 8 is mounted on the second stage of the body, and the screwed surfaces of the bodies 1 and 2 are not damaged. It does not damage the mountain. In addition, even when the body 2 stage 2 is manufactured by casting, the wall thickness is uniform, casting defects such as scraps are eliminated, and it can be used as it is even with iron-based materials without surface treatment on the inner surface. is there.

【0008】[0008]

【考案の効果】[Effect of the device]

以上説明したとおり、本考案による逆止弁内蔵ボール弁はインサートの外径部 にねじを設けていないので組立作業が簡単になり、かつボデー2段の鋳造性が向 上するという効果がある。 As explained above, the ball valve with a built-in check valve according to the present invention does not have a screw on the outer diameter portion of the insert, so that there is an effect that the assembling work is simplified and the castability of the two-stage body is improved.

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

【図1】本考案の一実施例を示す縦断面図FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

【図2】従来例を示す縦断面図FIG. 2 is a vertical sectional view showing a conventional example.

【符号の説明】[Explanation of symbols]

1…ボデー1段 1a…入口側配管接続部 2
…ボデー2段 2a…出口側配管接続部 2b…段差面 3
a…上流側シート 3b…下流側シート 4…ボール 4
a…流路 5…弁棒 6…ハンドル 7
…ガスケット 8…インサート 8a…弁座面 8
b…Oリング 9…ばね抑え 10…逆止弁体 1
1…コイルばね
1 ... Body 1st stage 1a ... Inlet side pipe connection 2
… Body 2 steps 2a… Outlet side pipe connection 2b… Step surface 3
a ... upstream seat 3b ... downstream seat 4 ... ball 4
a ... flow path 5 ... valve rod 6 ... handle 7
... Gasket 8 ... Insert 8a ... Valve seat surface 8
b ... O-ring 9 ... Spring restraint 10 ... Check valve body 1
1 ... Coil spring

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】上流側に配置したボデー1段の弁室に上流
側より順に上流側シートとボールとを装着し、該ボール
の頂部に前記ボデー1段を貫通した弁棒の下端を係止
し、 下流側に配置したボデー2段の孔に上流側より順に下流
側シートとインサートとばね抑えとを装着し、該ばね抑
えの下流側への移動を阻止する段差面を前記孔に形成
し、前記インサートと前記ばね抑えとの間にインサート
の下流側端面に形成した弁座面に着座する逆止弁体と該
逆止弁体を前記インサート側に押圧するコイルばねとを
装着し、 前記ボデー1段の下流側内面とボデー2段の上流側外面
とを螺着して前記両シートによって前記ボールを挟持し
た逆止弁内蔵ボール弁。
1. An upstream seat and a ball are mounted in this order from the upstream side to a valve chamber of a first-stage body arranged on the upstream side, and a lower end of a valve rod passing through the first-stage body is locked to the top of the ball. Then, the downstream seat, the insert and the spring retainer are installed in order from the upstream side in the holes of the two-stage body arranged on the downstream side, and a step surface for preventing the spring retainer from moving to the downstream side is formed in the hole. A check valve body seated on a valve seat surface formed on the downstream end face of the insert between the insert and the spring retainer, and a coil spring for pressing the check valve body toward the insert side, A ball valve with a built-in check valve, in which the downstream inner surface of the first body and the upstream outer surface of the second body are screwed together to sandwich the ball between the seats.
JP2597392U 1992-03-26 1992-03-26 Ball valve with built-in check valve Pending JPH0579136U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2597392U JPH0579136U (en) 1992-03-26 1992-03-26 Ball valve with built-in check valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2597392U JPH0579136U (en) 1992-03-26 1992-03-26 Ball valve with built-in check valve

Publications (1)

Publication Number Publication Date
JPH0579136U true JPH0579136U (en) 1993-10-26

Family

ID=12180677

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2597392U Pending JPH0579136U (en) 1992-03-26 1992-03-26 Ball valve with built-in check valve

Country Status (1)

Country Link
JP (1) JPH0579136U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100762914B1 (en) * 2006-06-27 2007-10-05 주식회사 아이엠코리아가스보일러 Air vent

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100762914B1 (en) * 2006-06-27 2007-10-05 주식회사 아이엠코리아가스보일러 Air vent

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