JPH0656573U - safety valve - Google Patents
safety valveInfo
- Publication number
- JPH0656573U JPH0656573U JP1088793U JP1088793U JPH0656573U JP H0656573 U JPH0656573 U JP H0656573U JP 1088793 U JP1088793 U JP 1088793U JP 1088793 U JP1088793 U JP 1088793U JP H0656573 U JPH0656573 U JP H0656573U
- Authority
- JP
- Japan
- Prior art keywords
- safety valve
- plate
- coil spring
- compression coil
- 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.)
- Granted
Links
Landscapes
- Safety Valves (AREA)
Abstract
(57)【要約】
【目的】 本考案は、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。
【構成】 本考案の安全弁は、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、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
工により設けたことを特徴とするものである。
(57) [Abstract] [Purpose] The present invention improves the positioning accuracy of the compression coil spring in the fitting portion of the plate and the compression coil spring,
It also extends the life of the press die during press working,
Further, another object of the present invention is to obtain a safety valve using an inexpensive plate that facilitates surface treatment after press molding. According to the safety valve of the present invention, a body 1 of the safety valve formed in a cylindrical shape is provided with a pressure introducing port 2, and a convex ring-shaped valve seat 3 is provided on the periphery thereof, and above the valve seat 3, a central bottom surface is provided. A valve body 6 having a packing 7 fitted in the opening 4 thereof, a compression coil spring 8, and a cylindrical portion 10 formed by burring.
In a safety valve sequentially accommodating a plate 11 with a through hole 9 formed therein, a ring-shaped burr groove 14 is formed by pressing at the intersection of the lower surface 12 of the plate 11 and the outer peripheral edge of the tubular portion 10. It is characterized by.
Description
【0001】[0001]
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。 The present invention relates to a safety valve to be installed in a refrigeration circuit, a boiler circuit, etc. of a car air conditioner, and particularly, to improve the positioning accuracy of the compression coil spring 8 in the fitting portion of the plate 11 and the compression coil spring 8 which are components of the safety valve. The plate 11 is improved and the plate 11 can be easily manufactured.
【0002】[0002]
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。 FIG. 2 shows a conventional safety valve. A cylinder-shaped safety valve body 1 is provided with a pressure inlet 2 at the bottom and a convex ring-shaped valve seat 3 at its periphery. On the other hand, a shoulder portion 5 for mounting a plate 11 described later is provided on the upper opening edge. Above the valve seat 3, a valve body 6 in which a packing 7 is fitted in an opening 4 at the center of the lower surface, a compression coil spring 8, and a tubular portion 10 and a passage 9 by burring are formed. The formed plates 11 are sequentially accommodated, and these parts are fixed by caulking the upper opening edge of the body 1 to the upper edge of the plate 11. Reference numeral 15 in the drawing is a male screw provided at the end portion on the pressure introducing side, which can be connected to a piping system or the like of the fluid to be controlled. 16 is an O-ring for the seal. When the pressure of the refrigerant circuit becomes higher than the set pressure, the valve body 6 overcomes the pressing force of the compression coil spring 8 and leaves the valve seat 3, and the refrigerant gas is directed from the passage 9 of the plate 11 in the axial direction of the body 1. Is released into the atmosphere, and when the pressure in the circuit drops, it is restored by the force of the compression coil spring 8.
【0003】[0003]
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13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 that defines the operating pressure of the safety valve is fixed by fitting the upper end of the compression coil spring 8 into the tubular portion 10 of the plate 11. However, since the compression coil spring 8 is functionally ground on the end face for the purpose of reducing the eccentric load, the corners are at right angles. As a result, the end surface of the compression coil spring 8 rests on the R portion, the positioning accuracy deteriorates, and the set length fluctuates, causing a problem that the valve opening pressure, which is a characteristic of the safety valve, varies. Therefore, a cutting process can be considered to eliminate the inner radius R, but the processing cost is high and it is impossible in practice. Although it is possible to make the radius R extremely small by press working, it has a bad influence on the life of the press die. Also, surface treatment such as plating is performed depending on the material of the plate 11, but since the plate upper surface 13 has no protrusions at all, the plate upper surfaces 13 are in contact with each other and cannot be adhered with the surface treatment material. As the surface treatment becomes defective, it is necessary to attach it to jigs one by one so that the plates do not easily overlap each other as a preventive measure, which is a factor of cost increase.
【0004】[0004]
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。 The object of the present invention is to solve the above problems, to improve the positioning accuracy of the compression coil spring in the fitting portion of the plate and the compression coil spring, and to perform the press working. The purpose is to extend the life of the press die at that time and to obtain a safety valve using an inexpensive plate that facilitates the surface treatment after press molding.
【0005】 すなわち、本考案の安全弁は、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、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たことを特徴とする ものである。That is, in the safety valve of the present invention, a pressure introducing port 2 is provided in a body 1 of the safety valve formed in a cylindrical shape, and a convex ring-shaped valve seat 3 is provided on the periphery thereof, and above the valve seat 3. A safety valve in which a valve body 6 in which a packing 7 is fitted in an opening 4 at the center of the lower surface, 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. A ring-shaped groove 14 is provided at the intersection of the lower surface 12 of 11 and the outer peripheral edge of the tubular portion 10 by press working.
【0006】[0006]
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、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。 Since the plate 11 used in the safety valve of the present invention is provided with a ring-shaped groove 14 at the intersection of the lower surface 12 and the outer peripheral edge of the tubular portion 10 by pressing, the tubular portion 10 is pressed. Since the inner side R due to bending is 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 at the corner of the tubular portion 10, and the valve opening pressure characteristic of the safety valve is used. It is possible to improve the accuracy of the above.
【0007】[0007]
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、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。 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical 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 release port 2 and a valve seat 3, a valve body 6 fitted with a packing 7, a compression coil spring 8, and a cylindrical portion 10 and a through port 9 formed by burring. Although it is constituted by the formed plate 11, the role of these components is exactly the same as that of the conventional product, and therefore 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、圧縮コイルばね8の端面は従来のように筒状部10のプレ ス曲げによる内側R部に載ることは決してない。従つて、圧縮コイルばね8の位 置決めが確実に行なえる。 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、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 of the safety valve of the present invention from the conventional product is only the plate 11 formed by press working such as burring, and this point will be described below. The plate 11 of the present invention has a semi-circular ring-shaped groove 14 formed by pressing at the intersection of the lower surface 12 and the outer peripheral edge of the tubular portion 10. That is, since the ring-shaped groove 14 is located deeper than the flat surface of the plate lower surface 12, the end surface of the compression coil spring 8 is formed by pressing the cylindrical portion 10 inside as in the conventional case. It never appears in the R section. Therefore, the position of the compression coil spring 8 can be reliably determined. Further, since the R of the ring-shaped groove 14 does not have to be particularly small, the life of the press die can be remarkably extended as compared with the conventional case. In addition, since the ring-shaped groove 14 allows the plate upper surface 13 to be raised, the plate upper surfaces 13 do not overlap each other during the surface treatment. Therefore, unlike the conventional case, it is not necessary to attach plates one by one to a jig or the like. Good.
【0009】[0009]
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 this invention, the 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 tubular portion 10 by press working. Since the inner side R by press bending is 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 tubular portion 10, which is a characteristic of the safety valve. The accuracy of pressure and the like can be improved. In addition, it is possible to obtain a safety valve which is excellent in both performance and price, which prolongs the life of the press die during press working and facilitates the surface treatment after press molding.
【図1】 本考案の安全弁の縦断面図。FIG. 1 is a vertical sectional view of a safety valve of the present invention.
【図2】 従来の安全弁の縦断面図。FIG. 2 is a vertical 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。1 Body 2 Pressure Inlet 3 Valve Seat 4 Opening 5 Shoulder 6 Valve Body 7 Packing 8 Compression Coil Spring 9 Passage 10 Cylindrical Part 11 Plate 12
Plate lower surface 13 Plate upper surface 14 Ring-shaped groove.
Claims (1)
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、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た
ことを特徴とする安全弁。1. A cylindrical safety valve body (1) is provided with a pressure introduction port (2), and a convex ring-shaped valve seat (3) is provided on the periphery of the body, and above the valve seat (3), an opening (4) at the center of the lower surface is provided. A valve body 6 in which a packing 7 is fitted, a compression coil spring 8,
Also, in a safety valve in which a cylindrical portion 10 and a plate 11 having a through hole 9 are sequentially accommodated by burring, a ring-shaped burr groove is formed at an intersection of a lower surface 12 of the plate 11 and an outer peripheral edge of the cylindrical portion 10. A safety valve characterized in that 14 is provided by press working.
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 true JPH0656573U (en) | 1994-08-05 |
JP2605318Y2 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 |
---|---|---|---|---|
JP2008514874A (en) * | 2004-09-24 | 2008-05-08 | ビアレッティ・インドゥストリエ・エス・ピー・エー | Method for manufacturing a safety valve and safety valve |
Families Citing this family (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 |
-
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 |
---|---|---|---|---|
JP2008514874A (en) * | 2004-09-24 | 2008-05-08 | ビアレッティ・インドゥストリエ・エス・ピー・エー | Method for manufacturing a safety valve and safety valve |
Also Published As
Publication number | Publication date |
---|---|
JP2605318Y2 (en) | 2000-07-10 |
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