JPH0689852B2 - Safety valve for air compressor - Google Patents
Safety valve for air compressorInfo
- Publication number
- JPH0689852B2 JPH0689852B2 JP62325303A JP32530387A JPH0689852B2 JP H0689852 B2 JPH0689852 B2 JP H0689852B2 JP 62325303 A JP62325303 A JP 62325303A JP 32530387 A JP32530387 A JP 32530387A JP H0689852 B2 JPH0689852 B2 JP H0689852B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- valve body
- valve
- piston
- hole
- 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
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Safety Valves (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、圧縮空気発生装置において、圧縮機の吐出側
に取り付ける空気圧縮機用安全弁に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety valve for an air compressor, which is attached to a discharge side of a compressor in a compressed air generating device.
従来の技術 第２図は従来の空気圧縮機用安全弁を示し、弁本体ａの
圧力導入孔ｂに対抗してピストンｃがコイルばねｄによ
り付勢して設けられ、該ピストンｃの端部に固定された
Ｏリングから成る弁体ｅが該圧力導入孔ｂの内端に形成
される弁座ｆに圧接している。2. Description of the Related Art FIG. 2 shows a conventional safety valve for an air compressor, in which a piston c is urged by a coil spring d to oppose a pressure introducing hole b of a valve body a and is provided at an end portion of the piston c. A valve body e composed of a fixed O-ring is in pressure contact with a valve seat f formed at the inner end of the pressure introducing hole b.
この構造において、圧力導入孔ｂの圧力が設定圧力にな
るとＯリングから成る弁体ｅのシール効果が無くなり、
当初PAの有効面積に作用していた圧力がPBの有効面積に
作用して受圧面積が急激に増えることによりピストンｃ
乃至弁体ｅがポップ動作して圧力導入孔ｂからの圧力を
圧力逃し孔ｇに急速に解放し、安全弁の機能を果たす。In this structure, when the pressure in the pressure introducing hole b reaches the set pressure, the sealing effect of the valve body e composed of the O ring disappears,
Initially, the pressure acting on the effective area of P A acts on the effective area of P B , and the pressure receiving area suddenly increases.
That is, the valve element e pops to rapidly release the pressure from the pressure introducing hole b to the pressure relief hole g, thereby fulfilling the function of the safety valve.
しかし、圧縮機の吐出量が少ない場合には、弁体ｅより
漏れた空気はピストンｃとガイドｈとのクリアランスｉ
より大気に放出され、ポップ動作をするのに十分な圧力
が上記PBの有効面積に作用しないため、安全弁に導入さ
れる空気量と安全弁から逃げる空気量が同一となってバ
ランス状態となり、ポップ動作をしなくなる欠点があ
る。However, when the discharge amount of the compressor is small, the air leaked from the valve body e is the clearance i between the piston c and the guide h.
Since the pressure released to the atmosphere and sufficient for popping does not act on the effective area of P B above, the amount of air introduced into the safety valve and the amount of air escaping from the safety valve become the same and a pop state is created. It has the drawback of not working.
発明が解決しようとする問題点 本発明は上記した点に着目して為されたものであり、圧
縮機の吐出量が少ない場合においてもバランスすること
なく、ポップ動作するようにした空気圧縮機用安全弁を
提供せんとするものである。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention has been made by paying attention to the above points, and is for an air compressor that performs pop operation without balance even when the discharge amount of the compressor is small. It is intended to provide a safety valve.
問題点を解決するための手段 上記の目的を達成するため、本発明においては、シリン
ダ状の弁本体１内に圧力調整スプリング７により付勢さ
れるピストン３を圧力導入孔2aに対向して設け、ピスト
ン３の端部において外周部に受圧部3bを残して主弁体４
を設け、圧力導入孔2aの端部に形成した弁座2bの外周に
受圧部3bに対向した空気導入室2cを形成すると共に弁本
体１には弁閉状態におけるピストン３との間のクリアラ
ンスｉを介して空気導入室2cと連通する圧力逃し孔1aを
形成し、圧力逃し孔1aに連通するようにして弁本体１に
接続した圧力調整弁V1の弁座13bに接離する副弁体16を
圧力調整スプリング７よりも弱い弾力のスプリング18で
圧力逃し孔1aの圧力に対抗して設ける構成を採用した。Means for Solving the Problems In order to achieve the above object, in the present invention, a piston 3 biased by a pressure adjusting spring 7 is provided inside a cylindrical valve body 1 so as to face the pressure introducing hole 2a. , The main valve body 4 leaving the pressure receiving portion 3b on the outer peripheral portion at the end portion of the piston 3.
Is provided, an air introduction chamber 2c facing the pressure receiving portion 3b is formed on the outer periphery of the valve seat 2b formed at the end of the pressure introduction hole 2a, and the clearance i between the valve body 1 and the piston 3 in the valve closed state is formed. through to form a pressure relief hole 1a communicating with the air intake chamber 2c, against the valve seat 13b of the pressure regulating valve V 1 which is connected to the valve body 1 so as to communicate with the pressure relief hole 1a and separating from the sub-valve body 16 is provided with a spring 18 having a weaker elasticity than the pressure adjusting spring 7 so as to counter the pressure of the pressure relief hole 1a.
実施例 第１図において、空気圧縮機用安全弁Ｖはシリンダ状の
弁本体１に螺着された圧力導入孔2aを形成した接続筒２
を有し、圧力導入孔2aの内端には弁座2bが形成されてい
る。弁本体１内には圧力導入孔2aに対抗してピストン３
が設けられ、ピストン３の端部において外周部に環状の
受圧部3bを残して固定されたＯリングから成る主弁体４
が弁座2bに接離する。Ｏリングの弁体４は、ピストン３
の端部に形成された支持筒部3aと該Ｏリング内に位置し
てボルト５によりピストン３に固定された支持片６によ
り弁座2b側を露出した状態で支持され、支持片６の通孔
6aより主弁体４の背後に圧入を導入することにより主弁
体４と弁座2bとのシール性能を高めるようにしている。Embodiment In FIG. 1, a safety valve V for an air compressor is a connecting cylinder 2 having a pressure introducing hole 2a screwed into a cylindrical valve body 1.
And a valve seat 2b is formed at the inner end of the pressure introducing hole 2a. Inside the valve body 1, the piston 3 is opposed to the pressure introducing hole 2a.
And a main valve body 4 composed of an O-ring fixed on the outer peripheral portion of the end of the piston 3 leaving an annular pressure receiving portion 3b.
Moves toward and away from the valve seat 2b. The valve body 4 of the O-ring is the piston 3
Is supported by the support cylinder portion 3a formed at the end of the valve and the support piece 6 located in the O-ring and fixed to the piston 3 by the bolt 5, with the valve seat 2b side exposed. Hole
The seal performance between the main valve body 4 and the valve seat 2b is improved by introducing a press fit from the 6a behind the main valve body 4.
７は圧力調整スプリングであって両端にばね受け8,9を
有し、一方のばね受け８はボール10を介してピストン３
に弾力を伝達し、他方のばね受け９は調節螺杆11に当接
している。A pressure adjusting spring 7 has spring bearings 8 and 9 at both ends thereof, and one spring bearing 8 is provided with a piston 3 via a ball 10.
The spring receiver 9 is in contact with the adjusting screw rod 11.
弁座2bの外周には前記環状の受圧部3bに対向した環状の
空気導入室2cが形成されると共に、空気導入室2cの外側
において弁本体１にはピストン３により開閉される圧力
逃し孔1aが形成され、主弁体４が弁座2bに当接した弁閉
状態においては空気導入室2cはピストン３と弁本体１と
の摺動部分におけるクリアランスｉを介して圧力逃し孔
1aに連通している。An annular air introduction chamber 2c is formed on the outer periphery of the valve seat 2b so as to face the annular pressure receiving portion 3b, and a pressure relief hole 1a opened and closed by a piston 3 is provided in the valve body 1 outside the air introduction chamber 2c. Is formed, and in the valve closed state in which the main valve body 4 is in contact with the valve seat 2b, the air introduction chamber 2c has a pressure relief hole through the clearance i in the sliding portion between the piston 3 and the valve body 1.
It communicates with 1a.
圧力逃し孔1aには圧力逃し弁V1が取付金具12を介して取
り付けられている。圧力逃し弁V1の弁本体13には圧力逃
し孔1aに連通する圧力導入孔13aが形成され、その内端
に形成されたテーパ状の弁座13bに対してピストン14の
端部においてナット15により固着された副弁体16が接離
する。ピストン14にはばね受け17との間において前記ス
プリング７よりも大巾に弾力を小さくした圧力設定スプ
リング18が設けられる。弁本体13には弁座13bを介して
大気に対する圧力解放孔13cが設けられる。A pressure relief valve V 1 is attached to the pressure relief hole 1a via a fitting 12. Pressure introducing hole 13a communicating with the pressure relief hole 1a is formed in the valve body 13 of the pressure relief valve V 1, the nut 15 at the end of the piston 14 against the tapered valve seat 13b formed in its inner end The sub-valve body 16 fixed by the above is brought into contact and separated. The piston 14 is provided with a pressure setting spring 18 having a larger elastic force than the spring 7 between the spring receiver 17 and the spring receiver 17. The valve body 13 is provided with a pressure release hole 13c for the atmosphere via a valve seat 13b.
上記構成において、圧力導入孔2aの圧力が所定の圧力に
達すると主弁体４と弁座2bとの間のシール性能が無くな
り、漏れた空気が空気導入室2cからピストン３と弁本体
１との間のクリアランスｉを通って主弁体４と副弁体16
との間の空間1a,13aに導入され、空間1a,13aに空気が蓄
積されることにより、該空間の圧力が上昇すると共に空
気導入室2cの圧力が上昇し、先ず弁座2bの口径分の有効
面積でピストン３に作用していた圧力導入孔2aからの圧
力が、次に受圧部3bを含めたピストン３の有効受圧面積
に作用し、大きな揚弁力となって急激な吐き出しを行う
ことにより容易にポップ動作してピストン３を押し揚
げ、これによって空間1a,13aに圧力を導入してこの圧力
により副弁体16が弁座13bより離れ、圧力解放孔13cより
大気に放出する。In the above configuration, when the pressure in the pressure introducing hole 2a reaches a predetermined pressure, the sealing performance between the main valve body 4 and the valve seat 2b is lost, and the leaked air leaks from the air introducing chamber 2c to the piston 3 and the valve body 1. Through the clearance i between the main valve body 4 and the sub valve body 16
Is introduced into the space 1a, 13a between and, by the accumulation of air in the space 1a, 13a, the pressure of the space rises and the pressure of the air introduction chamber 2c rises, first of all the diameter of the valve seat 2b. The pressure from the pressure introducing hole 2a acting on the piston 3 in the effective area of 2 acts on the effective pressure receiving area of the piston 3 including the pressure receiving portion 3b, and becomes a large valve lifting force to perform rapid discharge. As a result, the popping operation is easily performed to lift up the piston 3, thereby introducing pressure into the spaces 1a and 13a, and this pressure causes the sub-valve body 16 to separate from the valve seat 13b and to be released to the atmosphere through the pressure release hole 13c.
発明の効果 本発明は上記した如くに、シリンダ状の弁本体１内に圧
力調整スプリング７により付勢されるピストン３を圧力
導入孔2aに対向して設け、ピストン３の端部において外
周部に受圧部3bを残して主弁体４を設け、圧力導入孔2a
の端部に形成した弁座2bの外周に受圧部3bに対向した空
気導入室2cを形成すると共に弁本体１には弁閉状態にお
けるピストン３との間のクリアランスｉを介して空気導
入室2cと連通する圧力逃し孔1aを形成し、圧力逃し孔1a
に連通するようにして弁本体１に接続した圧力調整弁V1
の弁座13bに接離する副弁体16を圧力調整スプリング７
よりも弱い弾力のスプリング18で圧力逃し孔1aの圧力に
対抗して設けるものであるから、圧縮機の吐出量が少い
場合でも安全弁が圧力バランス状態になることがなく、
確実にポップ動作をしてその機能を全うすることができ
る。As described above, according to the present invention, the piston 3 urged by the pressure adjusting spring 7 is provided in the cylindrical valve body 1 so as to face the pressure introducing hole 2a. The main valve body 4 is provided by leaving the pressure receiving portion 3b, and the pressure introducing hole 2a
An air introducing chamber 2c facing the pressure receiving portion 3b is formed on the outer periphery of a valve seat 2b formed at the end of the air introducing chamber 2c via the clearance i between the valve body 1 and the piston 3 in the valve closed state. Form a pressure relief hole 1a communicating with the pressure relief hole 1a
Pressure control valve V 1 connected to the valve body 1 so as to communicate with
The valve seat 13b of the auxiliary valve body 16 which is separated from the valve seat 13b of
Since it is provided against the pressure of the pressure relief hole 1a with a spring 18 having a weaker elasticity, the safety valve will not be in a pressure balance state even when the discharge amount of the compressor is small,
It is possible to surely perform the pop operation and fulfill its function.
第１図は本発明の実施例についての断面図、 第２図は従来例の断面図、 第３図は第２図の要部拡大図である。 Ｖ……空気圧縮機用安全弁、V1……圧力逃し弁、１……
弁本体、1a……圧力逃し孔、2a……圧力導入孔、2b……
弁座、2c……空気導入室、３……ピストン、3b……受圧
部、４……主弁体、７……圧力調整スプリング、13b…
…圧力逃し孔の弁座、16……副弁体、18……スプリン
グ。FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a sectional view of a conventional example, and FIG. 3 is an enlarged view of a main part of FIG. V: Safety valve for air compressor, V 1 ... Pressure relief valve, 1 ...
Valve body, 1a ... Pressure relief hole, 2a ... Pressure introduction hole, 2b ...
Valve seat, 2c ... Air introduction chamber, 3 ... Piston, 3b ... Pressure receiving part, 4 ... Main valve body, 7 ... Pressure adjusting spring, 13b ...
… Valve seat for pressure relief hole, 16 …… Sub valve body, 18 …… Spring.
Claims (1)
ング７により付勢されるピストン３を圧力導入孔2aに対
向して設け、ピストン３の端部において外周部に受圧部
3bを残して主弁体４を設け、圧力導入孔2aの端部に形成
した弁座2bの外周の受圧部3bに対向した空気導入室2cを
形成すると共に弁本体１には弁閉状態におけるピストン
３との間のクリアランスｉを介して空気導入室2cと連通
する圧力逃し孔1aを形成し、圧力逃し孔1aに連通するよ
うにして弁本体１に接続した圧力調整弁V1の弁座13bに
接離する副弁体16を圧力調整スプリング７よりも弱い弾
力のスプリング18で圧力逃し孔1aの圧力に対抗して設け
て成ることを特徴とする空気圧縮機用安全弁。1. A piston 3 biased by a pressure adjusting spring 7 is provided in a cylindrical valve body 1 so as to face a pressure introducing hole 2a, and a pressure receiving portion is provided at an outer peripheral portion at an end portion of the piston 3.
The main valve body 4 is provided except for 3b, and an air introduction chamber 2c is formed facing the pressure receiving portion 3b on the outer periphery of the valve seat 2b formed at the end of the pressure introduction hole 2a. A valve seat of a pressure regulating valve V 1 connected to the valve body 1 so as to form a pressure relief hole 1a communicating with the air introduction chamber 2c through a clearance i between the piston 3 and the pressure relief hole 1a. A safety valve for an air compressor, characterized in that a sub valve body (16) which comes into contact with and separates from (13b) is provided by a spring (18) having a weaker elastic force than the pressure adjusting spring (7) against the pressure of the pressure relief hole (1a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62325303A JPH0689852B2 (en) | 1987-12-24 | 1987-12-24 | Safety valve for air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62325303A JPH0689852B2 (en) | 1987-12-24 | 1987-12-24 | Safety valve for air compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01169182A JPH01169182A (en) | 1989-07-04 |
| JPH0689852B2 true JPH0689852B2 (en) | 1994-11-14 |
Family
ID=18175310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62325303A Expired - Fee Related JPH0689852B2 (en) | 1987-12-24 | 1987-12-24 | Safety valve for air compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0689852B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7274490B2 (en) | 2002-02-19 | 2007-09-25 | Canon Kabushiki Kaisha | Image forming apparatus with control of maximum output of colorant |
| JP5767837B2 (en) * | 2011-03-28 | 2015-08-19 | カヤバ工業株式会社 | Differential pressure valve and air spring suspension |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4818725U (en) * | 1971-07-09 | 1973-03-02 |
-
1987
- 1987-12-24 JP JP62325303A patent/JPH0689852B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01169182A (en) | 1989-07-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |