JP2664401B2 - Valve overtightening prevention device - Google Patents
Valve overtightening prevention deviceInfo
- Publication number
- JP2664401B2 JP2664401B2 JP7157888A JP7157888A JP2664401B2 JP 2664401 B2 JP2664401 B2 JP 2664401B2 JP 7157888 A JP7157888 A JP 7157888A JP 7157888 A JP7157888 A JP 7157888A JP 2664401 B2 JP2664401 B2 JP 2664401B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- thread portion
- valve stem
- stem
- box
- 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
- Mechanically-Actuated Valves (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は農水産設備、水処理設備、建築設備、プラン
ト設備、上水道等の管路に用いられて好適な弁の過締め
防止装置に関する。The present invention relates to a valve overtightening prevention device suitable for use in pipelines such as agricultural and marine products facilities, water treatment facilities, building facilities, plant facilities, and waterworks.
［従来の技術］ 従来の弁として、流体流路を備える弁箱と、弁箱に対
し回転はするが自軸方向には移動しない状態で結合さ
れ、弁箱内に位置する部分に弁体用おねじ部を備える弁
棒と、弁棒の上記おねじ部に螺着されるめねじ部を備
え、弁箱に対して弁棒軸方向に移動はするが回転はしな
い状態で支持され、弁箱の流体流路を開閉する弁体と、
弁棒の弁箱外に位置する部分に固定される操作部材とを
有してなるものが用いられている。[Prior Art] As a conventional valve, a valve box having a fluid flow path is coupled to a valve box while rotating with respect to the valve box but not moving in its own axis direction. A valve stem having a male thread portion, and a female thread portion screwed to the male thread portion of the valve stem, supported in a state of moving in the valve stem axial direction but not rotating with respect to the valve box, A valve body for opening and closing the fluid flow path of the box;
An operating member fixed to a portion of the valve stem located outside the valve box is used.
上記従来の弁にあっては、操作部材による弁棒の回転
により、弁体を上下動することにて流体流路を開閉でき
る。ところが、弁体が流体流路の内面（弁座）に当接し
た後にさらに弁棒を閉じ方向に回転させて過締めする
と、ねじの論理に基づく強大な軸力を生じ、これがねじ
部や弁箱を破損せしめるおそれがある。In the above-mentioned conventional valve, the fluid passage can be opened and closed by moving the valve body up and down by rotation of the valve stem by the operating member. However, if the valve body is further abutted against the inner surface (valve seat) of the fluid flow path and the valve rod is further rotated in the closing direction and overtightened, a strong axial force based on the thread logic is generated, which causes the screw portion and the valve to rotate. The box may be damaged.
そこで従来、実公昭61−20381号公報に記載の如く、
弁棒のおねじ部下端面にストッパ片を設け、弁締切時に
上記ストッパ片を弁体のめねじ部下端面に当接せしめ、
これにより上述の過締めを防止するものが提案されてい
る。Therefore, conventionally, as described in Japanese Utility Model Publication No. 61-20381,
A stopper piece is provided on the lower end surface of the external thread portion of the valve stem, and when the valve is shut off, the stopper piece is brought into contact with the lower end surface of the female thread portion of the valve body.
It has been proposed to prevent the above-mentioned overtightening.
［発明が解決しようとする課題］ ところで、上記従来の弁の過締め防止装置にあって
は、弁棒の下端面にストッパ片を設けているから、組立
に際し、弁体のめねじ部を構成することとなるめねじ
ナットを弁棒のおねじ部に螺着させ、めねじナットの
下端から露出した弁棒の下端面にストッパ片を取着した
後、めねじナットを弁体本体部に強固に嵌着する必要
がある。[Problems to be Solved by the Invention] By the way, in the conventional valve overtightening prevention device, since the stopper piece is provided on the lower end surface of the valve rod, the female screw portion of the valve body is constructed at the time of assembly. After screwing the female screw nut to the external thread of the valve stem and attaching the stopper piece to the lower end face of the valve stem exposed from the lower end of the female screw nut, attach the female screw nut to the valve body. It must be firmly fitted.
しかしながら、めねじナットと弁体本体部との強固な
結合を組立段階で行なうものとすることは、非常に困難
をともない、組立性を阻害するだけでなく、弁の品質を
阻害する要因ともなる。However, it is very difficult and difficult to assemble the female screw nut and the valve body main body at the assembling stage. .
本発明は、弁の組立性や品質を損なうことなく、確実
に過締め防止することを目的とする。An object of the present invention is to reliably prevent overtightening without impairing the assemblability and quality of a valve.
［課題を解決するための手段］ 本発明は、流体流路を備える弁箱と、弁箱に対し回転
はするが自軸方向に移動しない状態で結合され、弁箱内
に位置する部分に弁体用おねじ部を備える弁棒と、弁棒
の上記おねじ部に螺着されるめねじ部を備え、弁箱に対
して弁棒軸方向に移動はするが回転はしない状態で支持
され、弁箱の流体流路を開閉する弁体と、弁棒の弁箱外
に位置する部分に固定される操作部材とを有してなる弁
の過締め防止装置において、弁棒が備える上記おねじ部
は該おねじ部の谷径より小径の中間軸部の一端に設けら
れる短尺状であり、弁体が備える上記めねじ部は弁体の
全ストロークにて弁棒の上記おねじ部と螺合できる長尺
状であり、弁体の上端部には弁棒の上記おねじ部端面が
衝合するストッパ部材が設けられるようにしたものであ
る。Means for Solving the Problems The present invention relates to a valve box provided with a fluid flow path, which is coupled to the valve box in a state of rotating with respect to the valve box but not moving in the direction of its own axis, and providing a valve at a portion located in the valve box. A valve stem having a male thread portion for a body, and a female thread portion screwed to the male thread portion of the valve stem, and is supported in a state of moving in the valve stem axial direction but not rotating with respect to the valve box. An overtightening prevention device for a valve, comprising a valve body for opening and closing a fluid flow path of a valve box, and an operating member fixed to a portion of the valve stem located outside the valve box; The thread portion is a short length provided at one end of the intermediate shaft portion having a smaller diameter than the root diameter of the male thread portion, and the female thread portion provided in the valve body is connected to the male thread portion of the valve stem at the entire stroke of the valve body. It is a long shape that can be screwed together, and a stopper member is provided at the upper end of the valve body with which the end surface of the male thread portion of the valve stem abuts. It is a thing.
［作用］ 本発明によれば、操作部材にて弁棒を回転させると、
弁棒に螺着されている弁体が移動し、弁箱の流体流路が
開閉せしめられる。この時、弁体が流体流路の内面（弁
座）に当接した締切り後、操作部材により過締めする
と、弁棒のおねじ部端面がストッパ部材に衝合し、それ
以上の弁棒の回転および弁体の移動が阻止される。これ
により、過締めねよるねじ部や弁箱の破損が回避され
る。[Operation] According to the present invention, when the valve stem is rotated by the operation member,
The valve element screwed to the valve stem moves, and the fluid flow path of the valve box is opened and closed. At this time, after the valve body abuts against the inner surface (valve seat) of the fluid flow path, if the operating member is overtightened, the end face of the external thread portion of the valve stem abuts against the stopper member, and the valve stem of the further valve stem is contacted. Rotation and movement of the valve body are prevented. As a result, damage to the screw portion and the valve box due to overtightening can be avoided.
しかして、本発明にあっては、過締め防止のためのス
トッパ部材が弁体の上端部に設けられるから、従来の如
く弁体本体部とめねじ部構成部品とを分割して組立てる
必要がない。すなわち、部品製造段階で弁体本体部にめ
ねじ部を形成することができ、弁の組立性や品質を損な
うことなく、確実に過締め防止することができる。According to the present invention, since the stopper member for preventing overtightening is provided at the upper end of the valve body, it is not necessary to separately assemble the valve body main portion and the female thread component as in the related art. . That is, the female thread portion can be formed in the valve body main body at the part manufacturing stage, and the overtightening can be reliably prevented without impairing the assemblability and quality of the valve.
［実施例］ 第１図は本発明の一実施例を示す断面図、第２図は第
１図の要部断面図、第３図は第２図のIII−III線に沿う
矢視図である。Embodiment FIG. 1 is a cross-sectional view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view of a main part of FIG. 1, and FIG. 3 is a view taken along the line III-III in FIG. is there.
弁10と、弁箱11と、弁棒12と、弁体13と、キャップ14
とを有している。Valve 10, valve box 11, valve stem 12, valve body 13, cap 14
And
弁箱11は、ハウジング15と、下ボンネット16と、上ボ
ンネット17と、弁棒受け板18の４者を不図示の固定ボル
トにて共締めすることに構成されている。ハウジング15
は、流体流路15Aを構成するとともに、弁室15Bを形成し
ている。The valve box 11 is configured such that the housing 15, the lower bonnet 16, the upper bonnet 17, and the valve stem receiving plate 18 are fastened together by fixing bolts (not shown). Housing 15
Constitutes a fluid passage 15A and forms a valve chamber 15B.
弁棒12は、中間フランジ部12Aを下ボンネット16と弁
棒受け板18の間に保持され、弁箱11に対し回転はするが
自軸方向には移動しない状態で結合されている。弁棒12
は、弁箱11の内部（ハウジング15の弁室15B）に位置す
る下端部に弁体用おねじ部12Bを備えている。図におい
て、19A、19B、19C、20A、20B、20CはＯリングである。The valve stem 12 is held with the intermediate flange portion 12A held between the lower bonnet 16 and the valve stem receiving plate 18, and is connected to the valve box 11 while rotating but not moving in its own axis direction. Valve stem 12
Is provided with a valve body thread 12B at the lower end located inside the valve box 11 (the valve chamber 15B of the housing 15). In the figure, 19A, 19B, 19C, 20A, 20B and 20C are O-rings.
弁体13は、弁棒12の上記おねじ部12Bに螺着されるめ
ねじナット（めねじ部）21を一体に備える。また、弁体
13は、ハウジング15の弁室15Bに臨む内面における、弁
棒軸方向に沿って設けられる案内溝22にスライド可能な
係合する係合突部23を備える。これにより、弁体13は、
弁箱11に対して弁棒軸方向に移動はするが回転はしない
状態で結合される。すなわち、弁体13は弁棒12の回転時
に弁棒軸方向に上下動し、ハウジング15の流体流路15A
を開閉する。The valve element 13 integrally includes a female screw nut (female screw part) 21 which is screwed to the male screw part 12B of the valve rod 12. Also, valve body
13 is provided with an engagement projection 23 which is slidable and engages with a guide groove 22 provided along the axial direction of the valve stem on the inner surface of the housing 15 facing the valve chamber 15B. Thereby, the valve element 13
It is connected to the valve box 11 in a state of moving in the axial direction of the stem but not rotating. That is, the valve element 13 moves up and down in the axial direction of the valve stem when the valve stem 12 rotates, and the fluid passage 15A of the housing 15 is formed.
Open and close.
キャップ14は、弁棒12の外部に位置する上端部に固定
され、ボックススパナが着脱できる。The cap 14 is fixed to an upper end located outside the valve stem 12, and a box spanner can be attached and detached.
ここで、弁棒12が備える上記おねじ部12Bは、該おね
じ部12Bの谷径より小径の中間軸部12Cの一端に設けられ
る短尺状とされている。すなわち、おねじ部12Bの長さ
は必要強度に充分耐える程度に設定されている。Here, the male screw portion 12B provided in the valve stem 12 is formed in a short shape provided at one end of the intermediate shaft portion 12C having a smaller diameter than the root diameter of the male screw portion 12B. That is, the length of the male screw portion 12B is set to a degree that can sufficiently withstand the required strength.
また、弁体13が備える上記めねじナット21は略円筒状
であり、弁体13の全開〜全閉の全ストロークにて弁棒12
の上記おねじ部12Bと螺合できる長尺状である。ここ
で、弁体13は、弁体本体部13Aと、該本体部13Aの外周面
に設けられる弾性シール部材13Bと、上記めねじナット2
1とをインサート成形にて一体化している。なお、めね
じナット21は、弁体本体部13Aと完全に結合するよう
に、該本体部13Aに埋設される回り止めフィン部21A、フ
ランジ部21Bを備えている。Further, the female screw nut 21 provided in the valve body 13 is substantially cylindrical, and the valve rod 12
It is a long shape that can be screwed with the male screw portion 12B. Here, the valve element 13 includes a valve element main body 13A, an elastic seal member 13B provided on the outer peripheral surface of the main body 13A, and the female screw nut 2.
1 and 1 are integrated by insert molding. The female screw nut 21 includes a detent fin 21A and a flange 21B embedded in the main body 13A so as to be completely connected to the valve main body 13A.
また、弁体13の上端部には、弁棒12の上記おねじ部12
Bの端面が衝合するストッパリング100を備えている。ス
トッパリング100はめねじナット21に螺着し、止ねじ101
にてロックされる。102はストッパリング100と弁棒12の
おねじ部12Bとの衝合位置調整のため、めねじナット21
に対する該ストッパリング100の螺着位置を変更可能と
する長孔である。The upper end of the valve body 13 has the male thread 12
The end face of B is provided with a stopper ring 100 which abuts. Stopper ring 100 is screwed into female screw nut 21 and set screw 101
Locked by. 102 is a female screw nut 21 for adjusting the abutment position between the stopper ring 100 and the male thread 12B of the valve stem 12.
It is a long hole that allows the screwing position of the stopper ring 100 to be changed.
なお、前述のめねじナット21の有効ねじ長さＬは、弁
体13の前述の全ストロークにストッパリング100の螺着
長さｌを加えた長さより長く設定される。The effective thread length L of the female screw nut 21 is set to be longer than the sum of the above-described entire stroke of the valve element 13 and the screw length l of the stopper ring 100.
次に、上記実施例の作用について説明する。 Next, the operation of the above embodiment will be described.
上記実施例によれば、キャップ14にて弁棒12を回転さ
せると、弁棒12に螺着されている弁体13が移動し、弁箱
11の流体流路15Aが開閉せしめられる。この時、弁体13
が流体流路15Aの内面（弁座）に当接した締切り後、キ
ャップ14により過締めすると、弁棒12のおねじ部12Bの
端面201がストッパリング100の端面202に衝合し、それ
以上の弁棒12の回転および弁体13の移動が阻止される。
これにより過締めによるねじ部12B、21や弁箱11の破損
が回避される。According to the above embodiment, when the valve rod 12 is rotated by the cap 14, the valve element 13 screwed to the valve rod 12 moves, and the valve box
The eleven fluid channels 15A are opened and closed. At this time, the valve 13
After the cutoff abuts against the inner surface (valve seat) of the fluid flow path 15A, when the cap 14 is overtightened, the end face 201 of the external thread portion 12B of the valve rod 12 abuts against the end face 202 of the stopper ring 100, and The rotation of the valve stem 12 and the movement of the valve element 13 are prevented.
This avoids damage to the screw portions 12B and 21 and the valve box 11 due to overtightening.
しかして、上記実施例にあっては、過締め防止のため
のストッパリング100が弁体13の上端部に設けられるか
ら、従来の如く弁体本体部13Aとめねじ構成部品（めね
じナット21）とを分割して組立てる必要がない。すなわ
ち、部品製造段階で弁体本体部13Aにめねじナット21を
形成することができ、弁10の組立性や品質を損なうこと
なく、確実に過締め防止することができる。In the above embodiment, since the stopper ring 100 for preventing overtightening is provided at the upper end of the valve body 13, the valve body main portion 13A and the female screw component (female screw nut 21) are provided as in the prior art. There is no need to divide and assemble. That is, the female screw nut 21 can be formed on the valve body main part 13A at the part manufacturing stage, and the overtightening can be reliably prevented without impairing the assemblability and quality of the valve 10.
また、上記実施例にあっては、組立時等における過締
め防止位置の調整に際し、弁棒12と弁体13との螺合を解
除することなく、止ねじ101を単にゆるめ、長孔102の範
囲でストッパリング100をめねじナット21の上端部にて
螺動調整することにより、上記過締め防止位置の調整を
容易に行なうことができる。Further, in the above embodiment, when adjusting the overtightening prevention position at the time of assembling or the like, without loosening the screw between the valve rod 12 and the valve body 13, the set screw 101 is simply loosened, and the long hole 102 is removed. By adjusting the stopper ring 100 by screwing the upper end of the female screw nut 21 within the range, the overtightening prevention position can be easily adjusted.
なお、本発明の実施において、操作部材はキャップに
限らず、ハンドル等であってもよい。In the embodiment of the present invention, the operation member is not limited to the cap, but may be a handle or the like.
［発明の効果］ 以上のように、本発明によれば、弁の組立性や品質を
損なうことなく、確実に過締め防止することができる。[Effects of the Invention] As described above, according to the present invention, overtightening can be reliably prevented without impairing the assemblability and quality of the valve.
第１図は本発明の一実施例を示す断面図、第２図は第１
図の要部断面図、第３図は第２図のIII−III線に沿う矢
視図である。 10……弁、 11……弁箱、 12……弁棒、 12B……おねじ部、 13……弁体、 14……キャップ（操作部材）、 21……めねじナット、 100……ストッパリング。FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG.
FIG. 3 is a sectional view taken along the line III-III of FIG. 10 Valve, 11 Valve box, 12 Valve stem, 12B Male thread, 13 Valve element, 14 Cap (operating member), 21 Female nut, 100 Stopper ring.
Claims (1)
はするが自軸方向には移動しない状態で結合され、弁箱
内に位置する部分に弁体用おねじ部を備える弁棒と、弁
棒の上記おねじ部に螺着されるめねじ部を備え、弁箱に
対して弁棒軸方向に移動はするが回転はしない状態で支
持され、弁箱の流体流路を開閉する弁体と、弁棒の弁箱
外に位置する部分に固定される操作部材とを有してなる
弁の過締め防止装置において、弁棒が備える上記おねじ
部は該おねじ部の谷径より小径の中間軸部の一端に設け
られる短尺状であり、弁体が備える上記めねじ部は弁体
の全ストロークにて弁棒の上記おねじ部と螺合できる長
尺状であり、弁体の上端部には弁棒の上記おねじ部端面
が衝合するストッパ部材が設けられることを特徴とする
弁の過締め防止装置。1. A valve body having a fluid flow path, which is coupled to the valve case so as to rotate with respect to the valve case but not move in the direction of its own axis. A valve stem, and a female thread portion screwed to the male thread portion of the valve stem, supported in a state in which the valve shaft moves in the axial direction of the valve stem but does not rotate with respect to the valve box, and a fluid flow path of the valve box. In the overtightening prevention device for a valve, comprising a valve element for opening and closing the valve, and an operating member fixed to a portion of the valve stem located outside the valve box, the external thread portion provided in the valve stem is the external thread portion Is a short shape provided at one end of the intermediate shaft portion having a smaller diameter than the root diameter, and the female thread portion provided in the valve body is a long shape which can be screwed with the male thread portion of the valve stem in the entire stroke of the valve body. A stopper member is provided at an upper end portion of the valve body with which the end surface of the male thread portion of the valve stem abuts. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7157888A JP2664401B2 (en) | 1988-03-24 | 1988-03-24 | Valve overtightening prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7157888A JP2664401B2 (en) | 1988-03-24 | 1988-03-24 | Valve overtightening prevention device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01242887A JPH01242887A (en) | 1989-09-27 |
| JP2664401B2 true JP2664401B2 (en) | 1997-10-15 |
Family
ID=13464718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7157888A Expired - Fee Related JP2664401B2 (en) | 1988-03-24 | 1988-03-24 | Valve overtightening prevention device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2664401B2 (en) |
-
1988
- 1988-03-24 JP JP7157888A patent/JP2664401B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01242887A (en) | 1989-09-27 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |