JP2605318Y2 - safety valve - Google Patents
safety valveInfo
- Publication number
- JP2605318Y2 JP2605318Y2 JP1993010887U JP1088793U JP2605318Y2 JP 2605318 Y2 JP2605318 Y2 JP 2605318Y2 JP 1993010887 U JP1993010887 U JP 1993010887U JP 1088793 U JP1088793 U JP 1088793U JP 2605318 Y2 JP2605318 Y2 JP 2605318Y2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- safety valve
- compression coil
- coil spring
- 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.)
- Expired - Fee Related
Links
Landscapes
- Safety Valves (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この考案は、カーエアコンの冷凍
回路やボイラ回路等に装着する安全弁に関するもので、
特に安全弁の構成部品であるプレート１１と圧縮コイル
ばね８の嵌合部における圧縮コイルばね８の位置決め精
度を向上させ、かつプレート１１を容易に製造できるよ
うにしたものである。This invention relates to a safety valve mounted on a refrigeration circuit or a boiler circuit of a car air conditioner.
In particular, the positioning accuracy of the compression coil spring 8 at the fitting portion between the plate 11 and the compression coil spring 8 which are components of the safety valve is improved, and the plate 11 can be easily manufactured.
【０００２】[0002]
【従来の技術】図２は、従来の安全弁を示すものであ
り、円筒形に形成された安全弁のボディ１には、下方に
圧力導入口２が設けられると共に、この周縁に凸環形状
の弁座３が設けられ、一方、上部開口縁には後述するプ
レート１１を載置させるための肩部５が設けられてい
る。そして、前記弁座３の上方には、下面中央の開口４
にパッキン７を嵌着してなる弁体６と、圧縮コイルばね
８、およびバーリング加工により筒状部１０と通口９を
形成したプレート１１が順次収納され、これらの部品
は、前記ボディ１の上部開口縁をプレート１１上縁にか
しめることによって固定されている。なお、図中１５
は、圧力導入側の端部に設けられたおねじであり、制御
すべき流体の配管系等に接続できるようになっている。
また、１６は、シール用のＯリングである。そして、冷
媒回路の圧力が設定圧力より高くなると、弁体６が圧縮
コイルばね８の押付力に打ち勝って弁座３より離れ、冷
媒ガスをプレート１１の通口９よりボディ１の軸線方向
に向かって大気中へ放出し、また、回路中の圧力が降下
すると圧縮コイルばね８の力で復帰するようになってい
る。2. Description of the Related Art FIG. 2 shows a conventional safety valve, in which a body 1 of a cylindrical safety valve is provided with a pressure inlet 2 below and a convex ring-shaped valve on the periphery. A seat 3 is provided, while a shoulder 5 for mounting a plate 11 described later is provided on the upper opening edge. An opening 4 in the center of the lower surface is provided above the valve seat 3.
A valve body 6 having a packing 7 fitted therein, a compression coil spring 8, and a plate 11 having a cylindrical portion 10 and a through-hole 9 formed by burring are sequentially housed. It is fixed by caulking the upper opening edge to the upper edge of the plate 11. In the figure, 15
Is a male screw provided at an end on the pressure introduction side, and can be connected to a piping system of a fluid to be controlled.
Reference numeral 16 denotes an O-ring for sealing. Then, when the pressure of the refrigerant circuit becomes higher than the set pressure, the valve element 6 overcomes the pressing force of the compression coil spring 8 and separates from the valve seat 3, and the refrigerant gas is directed to the axial direction of the body 1 from the passage 9 of the plate 11. The pressure is released to the atmosphere, and when the pressure in the circuit drops, the pressure is returned by the force of the compression coil spring 8.
【０００３】[0003]
【考案が解決しようとする課題】安全弁の作動圧を規定
する圧縮コイルばね８の固定は、その上端部をプレート
１１の筒状部１０嵌合させることによって行われてい
る。ところが、圧縮コイルばね８は機能上、偏心荷重の
削減等を目的として端面に研削加工を施しているので角
部は直角となっている。このため、圧縮コイルばね８の
端面がＲ部分に載りあがり位置決め精度が悪くなった
り、セット長さが変動したりして安全弁の特性である開
弁圧力がバラツクという問題があった。そこで、内側Ｒ
を無くすために切削加工が考えられるが加工費がかさみ
実際には不可能である。また、プレス加工により極めて
小さなＲにすることも考えられるが、プレス金型の寿命
に著しく悪影響を与える。また、プレート１１の材質に
よってはメッキ等の表面処理を施すが、プレート上面１
３には突起が一切ない為、プレート上面１３同士が接触
して重なり表面処理材が付着できず、その接触面が表面
処理不良となるので、その防止策としてプレート同士が
容易に重ならない様に、ひとつひとつ治具等に取り付け
ることが必要となり、コストアップの要因となってい
た。The compression coil spring 8, which regulates the operating pressure of the safety valve, is fixed by fitting the upper end of the compression spring 8 to the cylindrical portion 10 of the plate 11. However, since the end surface of the compression coil spring 8 is ground for the purpose of reducing the eccentric load and the like, the corners are right angles. For this reason, there is a problem that the end face of the compression coil spring 8 is mounted on the R portion, the positioning accuracy is deteriorated, and the set length is varied, so that the valve opening pressure, which is a characteristic of the safety valve, varies. So, inside R
Cutting is conceivable in order to eliminate the problem, but the processing cost is high and it is actually impossible. It is also conceivable to make the radius R extremely small by press working, but this has a significant adverse effect on the life of the press die. Depending on the material of the plate 11, surface treatment such as plating is performed.
3 has no projections, so that the upper surfaces 13 of the plates come into contact with each other and overlap, and the surface treatment material cannot be attached, and the contact surface becomes defective in surface treatment. As a preventive measure, prevent the plates from overlapping easily. However, it is necessary to attach each of them to a jig or the like, which has caused a cost increase.
【０００４】[0004]
【課題を解決するための手段】本考案の目的は、上記の
ような問題点を解消するためになされたもので、プレー
トと圧縮コイルばねの嵌合部における圧縮コイルばねの
位置決め精度を向上させ、また、プレス加工する際のプ
レス金型の寿命を延ばし、さらに、プレス成形後の表面
処理を容易にした安価なプレートを使用した安全弁を得
ることを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to improve the positioning accuracy of a compression coil spring at a fitting portion between a plate and a compression coil spring. It is another object of the present invention to obtain a safety valve using an inexpensive plate which extends the life of a press die during press working and further facilitates surface treatment after press forming.
【０００５】すなわち、請求項１に記載の安全弁は、円
筒形に形成した安全弁のボディ１に圧力導入口２を設け
ると共に、この周縁に凸環形状の弁座３を設け、この弁
座３の上方に、下面中央の開口４にパッキン７を嵌着し
てなる弁体６と、巻き端面を平滑に研磨した圧縮コイル
ばね８、およびバーリング加工により筒状部１０と通口
９を形成したプレート１１を、該プレートの筒状部１０
を圧縮コイルばね８のガイドとして順次収納した安全弁
において、前記プレート１１の下面１２と筒状部１０の
外周縁との交点部に、リング状のにげ溝１４をプレス加
工により設け、圧縮コイルばね８を真っ直ぐに位置決め
できるようにしたことを特徴とするものである。また、
請求項２に記載の安全弁は、前記のリング状のにげ溝１
４に対応させてプレート１１の上面部に凸部を設けたこ
とを特徴とするものである。 That is, in the safety valve according to the first aspect of the present invention, a pressure-introducing port 2 is provided in a body 1 of a safety valve formed in a cylindrical shape, and a convex ring-shaped valve seat 3 is provided around the periphery thereof. Above, a valve body 6 having a packing 7 fitted in an opening 4 in the center of the lower surface, and a compression coil whose winding end surface is polished smoothly.
Spring 8 and through-hole with cylindrical part 10 by burring
The plate 11 on which the plate 9 is formed is connected to the cylindrical portion 10 of the plate.
Safety valve sequentially accommodated as a guide for the compression coil spring 8
At the intersection of the lower surface 12 of the plate 11 and the outer peripheral edge of the cylindrical portion 10, a ring-shaped groove 14 is provided by press working to position the compression coil spring 8 straight.
It was possible manner is characterized in. Also,
The safety valve according to claim 2, wherein the ring-shaped groove 1 is provided.
4 is provided with a convex portion on the upper surface of the plate 11.
It is characterized by the following.
【０００６】[0006]
【作用】本考案の安全弁に使用するプレート１１は、そ
の下面１２と筒状部１０の外周縁との交点部に、リング
状のにげ溝１４をプレス加工により設けているから、筒
状部１０のプレス曲げによる内側Ｒはプレート下面１２
の平坦面よりも奥の位置にあるので、圧縮コイルばね８
の端面は筒状部１０のコーナーのＲ部に載ることはな
く、圧縮コイルばね８に座屈を起こさないから安全弁の
特性である開弁圧力等の精度を向上させることができ
る。 The plate used for the safety valve of the present invention has a ring at the intersection of its lower surface and the outer peripheral edge of the cylindrical portion.
Since the fuzzy groove 14 is provided by press working,
The inner radius R of the plate-shaped portion 10 by press bending is the lower surface 12 of the plate.
Of the compression coil spring 8
The end face of the
The buckling of the compression coil spring 8 does not occur,
Accuracy such as valve opening pressure, which is a characteristic, can be improved.
You.
【０００７】[0007]
【実施例】以下、本考案の一実施例を図に基づいて説明
する。図１は、本考案の一実施例を示す安全弁の縦断面
図である。本考案の安全弁は、圧力開放口２と弁座３を
備えたボディ１と、パッキン７を嵌着した弁体６と、巻
き端面を平滑に研磨した圧縮コイルばね８、およびバー
リング加工により筒状部１０と通口９を形成したプレー
ト１１とによって構成されるが、これらの部品の役割は
従来品と全く同じであるから、その詳細な説明を省略す
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a safety valve according to an embodiment of the present invention. The safety valve of the present invention includes a body 1 having a pressure relief port 2 and the valve seat 3, the valve body 6 is fitted to the packing 7, the winding
It is composed of a compression coil spring 8 whose end face is polished smoothly, and a cylindrical portion 10 and a plate 11 having a through hole 9 formed by burring. The role of these components is exactly the same as that of a conventional product. , The detailed description thereof will be omitted.
【０００８】本考案の安全弁における従来品との相違点
は、バーリング等のプレス加工により成形されるプレー
ト１１のみであるが、この点を以下に説明する。本考案
のプレート１１は、その下面１２と筒状部１０の外周縁
との交点部に、断面半円のリング状のにげ溝１４がプレ
ス加工により設けられている。すなわち、前記のリング
状のにげ溝１４は、プレート下面１２の平坦面よりも奥
に位置しているため、従来品のようにプレートの筒状部
１０と圧縮コイルばね８の内径との間に隙間を設けるこ
となく、且つ、巻き端面を平滑に研磨した圧縮コイルば
ね８であっても、その端面は筒状部１０のコーナーのＲ
部に載ることはなく真っ直ぐに載置され、圧縮コイルば
ね８に座屈を起こさないから安全弁の特性である開弁圧
力等の精度を向上させることができる。また、リング状
のにげ溝１４のＲは特に小さくしなくてよいから、プレ
ス金型の寿命を従来よも著しく延ばすことができる。ま
た、前記リング状のにげ溝１４に対応させてプレート１
１の上面部には凸部が設けられている。このリング状の
にげ溝１４によって、プレート上面１３に盛り上がりが
できるため、表面処理時にプレート上面１３同士が重な
らない為、従来のようにプレートをひとつひとつ治具等
に取り付けなくてもよい。The difference between the safety valve of the present invention and the conventional product is only the plate 11 formed by press working such as burring, which will be described below. The plate 11 of the present invention is provided with a ring-shaped groove 14 having a semicircular cross section at the intersection of the lower surface 12 and the outer peripheral edge of the cylindrical portion 10 by press working. That is, since the ring-shaped groove 14 is located deeper than the flat surface of the lower surface 12 of the plate, the cylindrical groove of the plate is different from the conventional product.
10 and a gap between the inner diameter of the compression coil spring 8
Compression coil with smooth and polished winding end face
Even if it is 8, its end face is the radius of the corner of the cylindrical portion 10.
It is placed straight, not on the part.
The valve opening pressure which is the characteristic of the safety valve because it does not cause buckling of the spring 8
The accuracy of force and the like can be improved. In addition, since the radius R of the ring-shaped groove 14 does not need to be particularly small, the life of the press die can be significantly extended as compared with the conventional case. Ma
In addition, the plate 1 corresponding to the ring-shaped
A convex portion is provided on the upper surface of 1. The plate-like upper surface 13 does not overlap with each other during the surface treatment because the ring-shaped groove 14 allows the plate upper surface 13 to bulge.
【０００９】[0009]
【考案の効果】この考案によれば、安全弁に使用するプ
レート１１の下面１２と筒状部１０の外周縁との交点部
に、リング状のにげ溝１４をプレス加工により設けてい
るから、筒状部１０のプレス曲げによる内側Ｒはプレー
ト下面１２の平坦面よりも奥の位置にあるので、圧縮コ
イルばね８の端面は筒状部１０のコーナーのＲ部に載る
ことはなく、安全弁の特性である開弁圧力等の精度を向
上させることができる。また、プレス加工する際のプレ
ス金型の寿命を延ばし、加えて、プレス成形後の表面処
理が容易になるという、性能及び価格の両面に優れた安
全弁を得ることができる。According to the present invention, a ring-shaped groove 14 is formed at the intersection of the lower surface 12 of the plate 11 used for the safety valve and the outer peripheral edge of the cylindrical portion 10 by press working. Since the inside R of the cylindrical portion 10 formed by press bending is located at a position deeper than the flat surface of the plate lower surface 12, the end surface of the compression coil spring 8 does not rest on the R portion of the corner of the cylindrical portion 10 and the safety valve Accuracy such as valve opening pressure, which is a characteristic, can be improved. In addition, it is possible to obtain a safety valve excellent in both performance and cost, in which the life of a press die at the time of press working is extended and, in addition, surface treatment after press forming is facilitated.
【図１】 本考案の安全弁の縦断面図。FIG. 1 is a longitudinal sectional view of the safety valve of the present invention.
【図２】 従来の安全弁の縦断面図。FIG. 2 is a longitudinal sectional view of a conventional safety valve.
１ ボディ ２ 圧力導入口 ３ 弁
座 ４ 開口 ５ 肩部 ６ 弁
体 ７ パッキン ８ 圧縮コイルばね ９ 通
口 １０ 筒状部 １１ プレート １２
プレート下面 １３ プレート上面 １４ リング状のにげ溝。DESCRIPTION OF SYMBOLS 1 Body 2 Pressure introduction port 3 Valve seat 4 Opening 5 Shoulder part 6 Valve body 7 Packing 8 Compression coil spring 9 Passage port 10 Cylindrical part 11 Plate 12
Plate lower surface 13 Plate upper surface 14 Ring-shaped groove.
Claims (2)
導入口２を設けると共に、この周緑に凸環形状の弁座３
を設け、この弁座３の上方に、下面中央の開口４にパッ
キン７を嵌着してなる弁体６と、巻き端面を平滑に研磨
した圧縮コイルばね８、およびバーリング加工により筒
状部１０と通口９を形成したプレート１１を、該プレー
トの筒状部１０を圧縮コイルばね８のガイドとして順次
収納した安全弁において、前記プレート１１の下面１２
と筒状部１０の外周縁との交点部に、リング状のにげ溝
１４をプレス加工により設け、圧縮コイルばね８を真っ
直ぐに位置決めできるようにしたことを特徴とする安全
弁。1. A pressure relief port 2 is provided in a body 1 of a safety valve formed in a cylindrical shape, and a convex ring-shaped valve seat 3 is formed in the peripheral green.
And a valve body 6 having a packing 7 fitted in an opening 4 at the center of the lower surface above the valve seat 3 and a polished end surface smooth.
Compression coil spring 8 and burring
The plate 11 having the opening 10 and the opening 9 is
Sequentially using the cylindrical portion 10 as a guide for the compression coil spring 8.
In the stored safety valve, the lower surface 12 of the plate 11
A ring-shaped groove 14 is formed by press working at the intersection of the outer peripheral edge of the cylindrical part 10 and the compression coil spring 8.
A safety valve characterized in that it can be positioned immediately .
プレート１１の上面部に凸部を設けたことを特徴とするA convex portion is provided on the upper surface of the plate 11.
請求項１記載の安全弁。The safety valve according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993010887U JP2605318Y2 (en) | 1993-01-18 | 1993-01-18 | safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993010887U JP2605318Y2 (en) | 1993-01-18 | 1993-01-18 | safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0656573U JPH0656573U (en) | 1994-08-05 |
| JP2605318Y2 true JP2605318Y2 (en) | 2000-07-10 |
Family
ID=11762836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993010887U Expired - Fee Related JP2605318Y2 (en) | 1993-01-18 | 1993-01-18 | safety valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2605318Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102444638A (en) * | 2011-12-06 | 2012-05-09 | 铜陵市久泰重型工矿设备有限公司 | Operating valve shell |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE602004019310D1 (en) * | 2004-09-24 | 2009-03-19 | Bialetti Ind Spa | METHOD FOR PRODUCING A SAFETY VALVE AND SAFETY VALVE |
-
1993
- 1993-01-18 JP JP1993010887U patent/JP2605318Y2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102444638A (en) * | 2011-12-06 | 2012-05-09 | 铜陵市久泰重型工矿设备有限公司 | Operating valve shell |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0656573U (en) | 1994-08-05 |
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|---|---|---|---|
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