JP2013204596A - Solenoid valve - Google Patents
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- JP2013204596A JP2013204596A JP2012070475A JP2012070475A JP2013204596A JP 2013204596 A JP2013204596 A JP 2013204596A JP 2012070475 A JP2012070475 A JP 2012070475A JP 2012070475 A JP2012070475 A JP 2012070475A JP 2013204596 A JP2013204596 A JP 2013204596A
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Abstract
Description
本発明は空調機器や給湯機器等に使用される電磁弁に関する。 The present invention relates to an electromagnetic valve used for an air conditioner, a hot water supply device, or the like.
図３は、空調機器や給湯機器に使用される電磁弁の１つの型式であるパイロット式電磁弁の励磁用コイルを取り除いて示す縦断面図である。 FIG. 3 is a longitudinal sectional view showing a pilot type solenoid valve, which is one type of solenoid valve used for air conditioning equipment and hot water supply equipment, with an excitation coil removed.
パイロット式電磁弁１は、ステンレス鋼材で形成される有底円筒状の弁本体１０を有し、弁本体１０に対して２本の配管パイプ２０，２２が弁本体１０内の弁室３０に連通するように接続される。 The pilot-type solenoid valve 1 has a bottomed cylindrical valve body 10 formed of a stainless steel material, and two piping pipes 20 and 22 communicate with a valve chamber 30 in the valve body 10 with respect to the valve body 10. To be connected.
弁室３０内には弁体４０が摺動自在に配設され、弁室３０の内壁面は摺動面３２として機能する。弁体４０は、弁室３０の底部に形成された弁座３４に対して離接し、弁体４０のシール部材４２が弁座３４に圧接されて閉弁する。弁体４０の外周部にはピストンリング４４が嵌装されて摺動面３２との間のシールを達成する。弁体４０の中央部にはパイロット孔４６が設けられている。 A valve body 40 is slidably disposed in the valve chamber 30, and the inner wall surface of the valve chamber 30 functions as a sliding surface 32. The valve body 40 comes into contact with the valve seat 34 formed at the bottom of the valve chamber 30, and the seal member 42 of the valve body 40 is pressed against the valve seat 34 to close the valve. A piston ring 44 is fitted on the outer periphery of the valve body 40 to achieve a seal with the sliding surface 32. A pilot hole 46 is provided in the center of the valve body 40.
弁本体１０の上部には鋼材で形成されるパイプホルダ８０がＴＩＧ溶接部Ｗにより固着される。パイプホルダ８０は弁本体１０の内周部に嵌合するように形成され、ガイドパイプ５０を支持する。ガイドパイプ５０の頂部には吸引子６０が固着される。ガイドパイプ５０内にはプランジャ７０が摺動自在に挿入され、プランジャ７０と吸引子６０の間には閉弁ばね７２が設けられる。プランジャ７０の下端部には、ボール弁体７４がカシメ手段により取り付けられる。ボール弁体７４は弁体４０のパイロット孔４６の開口部に形成されるパイロット弁座４８に当接してパイロット孔４６を閉じる。 A pipe holder 80 formed of a steel material is fixed to the upper portion of the valve body 10 by a TIG welded portion W. The pipe holder 80 is formed so as to be fitted to the inner periphery of the valve body 10 and supports the guide pipe 50. A suction member 60 is fixed to the top of the guide pipe 50. A plunger 70 is slidably inserted into the guide pipe 50, and a valve closing spring 72 is provided between the plunger 70 and the suction element 60. A ball valve body 74 is attached to the lower end portion of the plunger 70 by caulking means. The ball valve body 74 abuts on a pilot valve seat 48 formed at the opening of the pilot hole 46 of the valve body 40 to close the pilot hole 46.
ガイドパイプ５０の外周部に取り付けられる図示しない励磁用コイルに通電されると、吸引子６０が磁化され、プランジャ７０が閉弁ばね７２に抗して吸引子６０側に引き寄せられる。この作用によりボール弁体７４はパイロット弁座４８から離れてパイロット孔４６が開き、弁体４０はパイプ２０内とパイプ２２内の流体の差圧により開方向に移動する。
この種のパイロット式電磁弁は、下記の特許文献１等に開示されている。
When an excitation coil (not shown) attached to the outer peripheral portion of the guide pipe 50 is energized, the attractor 60 is magnetized, and the plunger 70 is attracted toward the attractor 60 against the valve closing spring 72. By this action, the ball valve body 74 is separated from the pilot valve seat 48 and the pilot hole 46 is opened, and the valve body 40 moves in the opening direction due to the differential pressure of the fluid in the pipe 20 and the pipe 22.
This type of pilot solenoid valve is disclosed in the following Patent Document 1 and the like.
図４は弁本体１０に対してパイプホルダ８０をＴＩＧ溶接により溶接固着する部分の詳細を示し、（ａ）は溶接前の状態を示し、（ｂ）は溶接後の状態を示す。 FIG. 4 shows details of a portion where the pipe holder 80 is welded and fixed to the valve body 10 by TIG welding, (a) shows a state before welding, and (b) shows a state after welding.
パイプホルダ８０は段付の円筒状で、円筒状の弁本体１０の開口部１２に対して弁本体１０の上端面１４に当接するように挿入される。パイプホルダ８０の外径寸法は弁本体１０の外径寸法とほぼ等しく、開口部１２内に挿入される縮径部８２と上端面１４に当接するフランジ８６を有する。この溶接前の状態では弁体４０の外周部と摺動面３２との間には微小なクリアランスＣ１が形成される。 The pipe holder 80 has a stepped cylindrical shape, and is inserted into the opening 12 of the cylindrical valve body 10 so as to contact the upper end surface 14 of the valve body 10. The outer diameter of the pipe holder 80 is substantially equal to the outer diameter of the valve body 10, and has a reduced diameter portion 82 inserted into the opening 12 and a flange 86 that abuts the upper end surface 14. In this state before welding, a minute clearance C <b> 1 is formed between the outer peripheral portion of the valve body 40 and the sliding surface 32.
この状態で弁本体１０とパイプホルダ８０は外周部側からＴＩＧ溶接により固着される。これにより、溶接ビードＷが形成される。溶接ビードＷは符号Ｆ１で示す溶込み深さ寸法を有して形成される。ＴＩＧ溶接は約１０００℃の高温を付加するので、この深さＦ１が深くなると、弁本体１０の内側（摺動面）のエリアＳ１は溶接熱の影響を受けて内径寸法が縮小する方向に熱変形する。 In this state, the valve body 10 and the pipe holder 80 are fixed from the outer peripheral side by TIG welding. Thereby, the weld bead W is formed. The weld bead W is formed having a penetration depth dimension indicated by reference numeral F1. Since TIG welding applies a high temperature of about 1000 ° C., when the depth F1 is increased, the area S1 on the inner side (sliding surface) of the valve body 10 is affected by the welding heat and heats in a direction in which the inner diameter dimension decreases. Deform.
この熱変形により、開口部１２には、内側に倒れて変形した熱変形部１２ａが形成される。これにより、弁体４０の上端側にあっては、摺動クリアランスが減小し、弁体４０が摺動不良を起こす原因となる。そのため、溶接ビードＷの溶込み深さを深くすることができず、必要な溶接強度を確保できない場合があった。 As a result of this thermal deformation, the opening 12 is formed with a thermally deformable portion 12a that is deformed by falling inward. Thereby, in the upper end side of the valve body 40, a sliding clearance decreases and it causes the valve body 40 to slide poorly. For this reason, the penetration depth of the weld bead W cannot be increased, and the necessary welding strength may not be ensured.
また、弁本体１０の内圧によってパイプホルダ８０には弁本体１０から引き剥がす方向の応力が作用するため、この熱変形を減らすために、弁本体１０の上端面１４全面を溶かすことができないと、溶接ビードＷの最内周部位Ｐを起点に上下方向の応力が加わる。これによって、溶接ビードＷに割れが発生し易くなって、溶接ビードＷの疲労強度が低下するという問題があった。 Further, since the stress in the direction of peeling from the valve body 10 acts on the pipe holder 80 due to the internal pressure of the valve body 10, in order to reduce this thermal deformation, the entire upper end surface 14 of the valve body 10 cannot be melted. A stress in the vertical direction is applied starting from the innermost peripheral portion P of the weld bead W. As a result, cracks are likely to occur in the weld bead W, and the fatigue strength of the weld bead W is reduced.
なお、この現象は、パイロット方式の電磁弁に限らず、その他の電磁弁でも生じる。
そこで、本発明の目的は、上述した不具合を解消する電磁弁を提供することにある。
This phenomenon occurs not only in the pilot type solenoid valve but also in other solenoid valves.
Accordingly, an object of the present invention is to provide an electromagnetic valve that eliminates the above-described problems.
上記目的を達成するために、本発明は、弁座が形成された弁室を有する筒状の弁本体と、弁室内に摺動自在に装備される弁体と、弁本体の開口部の内周部に嵌合するとともに、溶接により前記弁本体に固着されるパイプホルダと、パイプホルダにより支持されるガイドパイプと、ガイドパイプ内に摺動自在に挿入されて弁体を移動させるプランジャと、プランジャを駆動する電磁コイルとを備え、弁本体とパイプホルダが、それらの外周部側からの溶接によって固着される電磁弁であって、弁本体の開口端の内周部に、外方に向けて径寸法が大きくなるテーパー内径部を設け、パイプホルダに、弁本体のテーパー内径部に対応するテーパー外径部を設けたものである。 In order to achieve the above object, the present invention provides a tubular valve body having a valve chamber in which a valve seat is formed, a valve body slidably mounted in the valve chamber, and an opening in the valve body. A pipe holder that is fitted to the peripheral portion and fixed to the valve body by welding, a guide pipe supported by the pipe holder, a plunger that is slidably inserted into the guide pipe and moves the valve body, An electromagnetic coil for driving the plunger, and the valve body and the pipe holder are fixed by welding from the outer peripheral side thereof, and are directed outwardly to the inner peripheral portion of the opening end of the valve main body. A tapered inner diameter portion having a larger diameter is provided, and a tapered outer diameter portion corresponding to the tapered inner diameter portion of the valve body is provided on the pipe holder.
なお、弁本体の開口端の外径寸法をＤ１とし、テーパー内径部の開口端の内径寸法をＤ２とし、溶接部の溶込み深さ寸法をＦ2としたときに、Ｄ２は、Ｄ１からＦ2の２倍を差し引いた値以上に設定するのが好ましい。
また、弁本体とパイプホルダは、例えばステンレス鋼材で形成され、ＴＩＧ溶接で接合することができる。
When the outer diameter dimension of the opening end of the valve body is D1, the inner diameter dimension of the opening end of the tapered inner diameter portion is D2, and the penetration depth dimension of the welded portion is F2, D2 is from D1 to F2. It is preferable to set it equal to or greater than the value obtained by subtracting 2 times.
Moreover, a valve main body and a pipe holder are formed, for example with a stainless steel material, and can be joined by TIG welding.
本発明の電磁弁は、上記構成を備えることにより、ＴＩＧ溶接等の溶接熱歪による弁体の摺動不良を防止することができる。また、高圧の冷媒により溶接部へ繰り返し与えられる加圧に対する疲労強度を向上させることができる。 The solenoid valve of the present invention can prevent the sliding failure of the valve body due to welding thermal distortion such as TIG welding by providing the above configuration. Further, the fatigue strength against pressurization repeatedly applied to the weld by the high-pressure refrigerant can be improved.
図１は、本発明の電磁弁の要部の断面図であって、（ａ）は弁本体１０´とパイプホルダ８０´の溶接前の状態を示し、（ｂ）は弁本体１０´とパイプホルダ８０´の溶接後の状態を示す。弁本体１０´とパイプホルダ８０´はステンレス鋼材で形成される。 FIG. 1 is a cross-sectional view of the main part of the electromagnetic valve of the present invention, where (a) shows the state before welding of the valve body 10 'and the pipe holder 80', and (b) shows the valve body 10 'and the pipe The state after welding of holder 80 'is shown. The valve body 10 'and the pipe holder 80' are made of stainless steel.
本発明の電磁弁１´にあっては、弁本体１０´の上部の開口部の内側をテーパー面としたテーパー内径部１６を形成している。テーパー内径部１６の上端部に連続する端面１８は平坦に形成される。また、パイプホルダ８０´は、弁本体１０´のテーパー内径部１６に対応するテーパー面を有するテーパー外径部８４と、フランジ８８を有する。その他の構成部材は先に説明したパイロット式電磁弁の構成部材と同様であるので、同一符号を付して説明は省略する。 In the electromagnetic valve 1 ′ of the present invention, a tapered inner diameter portion 16 is formed in which the inner side of the upper opening of the valve body 10 ′ is a tapered surface. The end face 18 that continues to the upper end of the tapered inner diameter portion 16 is formed flat. Further, the pipe holder 80 ′ has a tapered outer diameter portion 84 having a tapered surface corresponding to the tapered inner diameter portion 16 of the valve body 10 ′, and a flange 88. The other constituent members are the same as the constituent members of the pilot solenoid valve described above, so the same reference numerals are given and the description thereof is omitted.
図１の（ｂ）は、弁本体１０´とパイプホルダ８０´を外周部側からＴＩＧ溶接により溶接した後の状態を示す。溶接により溶接ビードＷが形成される。溶接ビードＷの溶込み深さは符号Ｆ2で示される。溶接熱の影響を受けて、パイプホルダ８０´のテーパー外径部８４に連続する部分は符号８４ａに示すように凹状に変形し、同様に弁本体１０´のテーパー内径部１６は符号１６ａに示すように凹状に変形する。 FIG. 1B shows a state after the valve body 10 ′ and the pipe holder 80 ′ are welded from the outer peripheral side by TIG welding. A weld bead W is formed by welding. The penetration depth of the weld bead W is indicated by the symbol F2. Under the influence of the welding heat, the portion continuing to the tapered outer diameter portion 84 of the pipe holder 80 'is deformed into a concave shape as indicated by reference numeral 84a. Similarly, the tapered inner diameter portion 16 of the valve body 10' is indicated by reference numeral 16a. It deforms into a concave shape.
しかしながら、溶接ビードＷの溶接熱の影響は、パイプホルダ８０´のテーパー外径部８４と弁本体１０´のテーパー内径部１６の部分で吸収され、弁本体１０´の摺動面３２は、溶接熱による内径寸法の変形が小さくて済むので、弁体４０の摺動不良は避けることができる。
この電磁弁の溶接前の弁本体１０´の開口部の外径寸法をＤ１、溶接の溶込み深さをＦ２、テーパー内径部１６の開口端側の内径寸法をＤ２とすると、
Ｄ２≧Ｄ１−２Ｆ2
となるように設定される。
また、テーパー内径部１６の上下方向の長さＬは、弁体４０の摺動性に影響を与えない長さ以上となるように設定される。
However, the influence of the welding heat of the weld bead W is absorbed by the tapered outer diameter portion 84 of the pipe holder 80 'and the tapered inner diameter portion 16 of the valve body 10', and the sliding surface 32 of the valve body 10 'is welded. Since the deformation of the inner diameter due to heat is small, the sliding failure of the valve body 40 can be avoided.
When the outer diameter of the opening of the valve body 10 'before welding of the electromagnetic valve is D1, the penetration depth of welding is F2, and the inner diameter of the tapered inner diameter portion 16 on the opening end side is D2.
D2 ≧ D1-2F2
Is set to be
Further, the length L in the vertical direction of the tapered inner diameter portion 16 is set to be equal to or longer than the length that does not affect the slidability of the valve body 40.
図２は、本発明の要部を示す図であって、（ａ）は溶接後の状態を示し、（ｂ）は（ａ）のＡ部の拡大図である。
本発明の構造により、溶込み深さ寸法Ｆ2は図４の（ｂ）に示す溶込み深さ寸法Ｆ１より大きくすることができる。すなわち、弁体４０が摺動する摺動面３２の上部をあらかじめ熱変形量を考慮したテーパー面とすることにより、より深くまで溶込みを行うことができ、より幅の大きな溶接ビードＷを形成することが出来るので、溶接強度が大きくなる。溶接ビードＷは弁本体１０の端面１８全面を溶かすことができるように形成することができ、弁本体１０の内圧によりパイプホルダ８０に作用する応力により溶接ビードＷに応力Ｔ１が加わった場合でも、溶接面Ｗ１全体で受けることができるので、溶接ビードＷが破壊しにくく、溶接ビードＷの加圧繰り返し強度（疲労強度）を大きくすることができる。
2A and 2B are diagrams showing the main part of the present invention, in which FIG. 2A shows a state after welding, and FIG. 2B is an enlarged view of part A of FIG.
According to the structure of the present invention, the penetration depth dimension F2 can be made larger than the penetration depth dimension F1 shown in FIG. That is, by making the upper portion of the sliding surface 32 on which the valve body 40 slides into a tapered surface in consideration of the amount of thermal deformation, it is possible to perform deeper penetration and form a wider weld bead W. The welding strength is increased. The weld bead W can be formed so that the entire end face 18 of the valve body 10 can be melted. Even when the stress T1 is applied to the weld bead W due to the stress acting on the pipe holder 80 due to the internal pressure of the valve body 10, Since it can be received by the whole welding surface W1, the weld bead W is hard to break, and the pressurization repeated strength (fatigue strength) of the weld bead W can be increased.
本発明は、以上のように、溶接時の熱変形部位を弁体４０の摺動面３２から遠ざけることができ、弁体４０の摺動の円滑化を確保することができる。また、溶接ビードＷの加圧繰り返し強度を向上させることができ、耐久性及び信頼性が向上する。 As described above, according to the present invention, the thermal deformation site during welding can be moved away from the sliding surface 32 of the valve body 40, and smooth sliding of the valve body 40 can be ensured. Moreover, the pressurization repeated strength of the weld bead W can be improved, and durability and reliability are improved.
１，１´ 電磁弁
１０，１０´ 弁本体
１２ 開口部
１４ 上端面
１６ テーパー内径部
１８ 端面
２０、２２ パイプ
３０ 弁室
３２ 摺動面
３４ 弁座
４０ 弁体
４２ シール部材
４４ ピストンリング
４６ パイロット孔
４８ パイロット弁座
５０ ガイドパイプ
６０ 吸引子
７０ プランジャ
７２ 閉弁ばね
７４ ボール弁体
８０，８０´ パイプホルダ
８２ 縮径部
８４ テーパー外径部
DESCRIPTION OF SYMBOLS 1,1 'Solenoid valve 10,10' Valve main body 12 Opening part 14 Upper end surface 16 Taper inner diameter part 18 End surface 20, 22 Pipe 30 Valve chamber 32 Sliding surface 34 Valve seat 40 Valve body 42 Seal member 44 Piston ring 46 Pilot hole 48 Pilot valve seat 50 Guide pipe 60 Suction element 70 Plunger 72 Valve closing spring 74 Ball valve body 80, 80 'Pipe holder 82 Reduced diameter section 84 Taper outer diameter section
Claims (3)
前記弁本体の開口部に、外方に向けて径寸法が大きくなるテーパー内径部を設け、前記パイプホルダに、前記弁本体のテーパー内径部に対応するテーパー外径部を設けたことを特徴とする電磁弁。 A tubular valve body having a valve chamber in which a valve seat is formed, a valve body slidably provided in the valve chamber, and an inner peripheral portion of an opening of the valve body, and the valve body A valve main body and a pipe comprising: a pipe holder to be fixed; a guide pipe supported by the pipe holder; a plunger that is slidably inserted into the guide pipe to move the valve body; and an electromagnetic coil that drives the plunger. The holder is a solenoid valve fixed by welding from the outer peripheral side thereof,
The opening of the valve body is provided with a tapered inner diameter portion whose diameter increases toward the outside, and the pipe holder is provided with a tapered outer diameter portion corresponding to the tapered inner diameter portion of the valve body. Solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012070475A JP5953085B2 (en) | 2012-03-27 | 2012-03-27 | solenoid valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012070475A JP5953085B2 (en) | 2012-03-27 | 2012-03-27 | solenoid valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2013204596A true JP2013204596A (en) | 2013-10-07 |
| JP5953085B2 JP5953085B2 (en) | 2016-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2012070475A Active JP5953085B2 (en) | 2012-03-27 | 2012-03-27 | solenoid valve |
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| Country | Link |
|---|---|
| JP (1) | JP5953085B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5671595A (en) * | 1979-11-19 | 1981-06-15 | Toshiba Corp | Welding method for tube and tube plate in heat exchanger |
| JPS631878A (en) * | 1986-06-20 | 1988-01-06 | Matsushita Refrig Co | Selector valve |
| JPH1047526A (en) * | 1996-05-25 | 1998-02-20 | Robert Bosch Gmbh | Valve block equipped with at least one washer faced valve to be electromagnetically controlled |
-
2012
- 2012-03-27 JP JP2012070475A patent/JP5953085B2/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5671595A (en) * | 1979-11-19 | 1981-06-15 | Toshiba Corp | Welding method for tube and tube plate in heat exchanger |
| JPS631878A (en) * | 1986-06-20 | 1988-01-06 | Matsushita Refrig Co | Selector valve |
| JPH1047526A (en) * | 1996-05-25 | 1998-02-20 | Robert Bosch Gmbh | Valve block equipped with at least one washer faced valve to be electromagnetically controlled |
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| Publication number | Publication date |
|---|---|
| JP5953085B2 (en) | 2016-07-13 |
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