JPH01288671A - Safety valve - Google Patents
Safety valveInfo
- Publication number
- JPH01288671A JPH01288671A JP11777188A JP11777188A JPH01288671A JP H01288671 A JPH01288671 A JP H01288671A JP 11777188 A JP11777188 A JP 11777188A JP 11777188 A JP11777188 A JP 11777188A JP H01288671 A JPH01288671 A JP H01288671A
- Authority
- JP
- Japan
- Prior art keywords
- valve body
- valve
- biasing member
- valve seat
- casing
- 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.)
- Pending
Links
- 230000006835 compression Effects 0.000 claims description 38
- 238000007906 compression Methods 0.000 claims description 38
- 238000013459 approach Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 13
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000002040 relaxant effect Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241001474374 Blennius Species 0.000 description 1
- 241001274216 Naso Species 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Safety Valves (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、設定圧力を任意に設定することができる安全
弁に関し、特に、設定圧力を微少圧力に設定するのに好
適な安全弁に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a safety valve whose set pressure can be arbitrarily set, and particularly to a safety valve suitable for setting the set pressure to a minute pressure.
従来の技術
従来、この種の安全弁（」種々の構造のものが知られて
いる。例えば、設定圧力を微少圧力に設定するいわゆる
超微圧用安全弁として使用される安全弁を第５図に一例
として示４′。この安全弁は、弁座４０にケーシング４
４を螺合さ且、上記ケーシング４４内に弁体４１を軸方
向に移動可能に収納して、弁座４０の上端面／ＩＯａに
対して弁体４１の下端面４１ａを接離可能に配置し、」
１記弁体４１の自重を調整して設定圧力を設定するよう
に構成している。なお、図中、４２はケーシング４４内
での弁体４Ｉの移動を案内する案内筒、４３は該案内筒
４２をケーシング４４に固定する蓋である。2. Description of the Related Art Hitherto, this type of safety valve has been known with various structures. For example, a safety valve used as a so-called ultra-low pressure safety valve that sets the set pressure to a minute pressure is shown as an example in FIG. 4'.This safety valve has a casing 4 on the valve seat 40.
4 are screwed together, and the valve element 41 is housed in the casing 44 so as to be movable in the axial direction, and the lower end surface 41a of the valve element 41 is arranged so as to be movable toward and away from the upper end surface/IOa of the valve seat 40. death,"
1. The setting pressure is set by adjusting the weight of the valve body 41. In the figure, 42 is a guide tube that guides the movement of the valve body 4I within the casing 44, and 43 is a lid that fixes the guide tube 42 to the casing 44.
発明が解決しようとする課峻
しかしながら、」１記構造のものでは、弁体４１の自重
により設定圧力を決定するため、弁体自体を少し削って
はその自重を測定して所定重量になったかとうかを検利
する必要があり、上記安全弁の設定圧力の調整か非常に
煩雑であるといった問題かあった。また、上記設定圧力
を変更する場合、設定圧力を小さくする場合には上記弁
体自体をさらに削ればよいが、逆に設定圧力を大きくす
る場合には弁体４１の自重を増加させる必要が生しるか
、弁体４１の自重を増加させることはてきず、弁体４１
を交換しな（ジればなら４−１設定圧力の変更作業も非
常に煩肩１であるといった問題があった。However, in the structure described in item 1, the set pressure is determined by the weight of the valve body 41, so the valve body itself is slightly shaved and its own weight is measured to reach a predetermined weight. There was a problem that it was necessary to check whether the pressure was high or not, and the adjustment of the set pressure of the safety valve was extremely complicated. Furthermore, when changing the set pressure, if the set pressure is decreased, it is sufficient to further shave the valve body itself, but on the other hand, when the set pressure is increased, it is necessary to increase the weight of the valve body 41. However, it is not possible to increase the self-weight of the valve body 41, and the valve body 41
There was a problem in that changing the set pressure in 4-1 was also extremely cumbersome.
また、上記弁体は自重て単に弁座に接触してし）るだ（
Ｊであるため、搬送中などにおいては、上記安全弁に振
動が与えられるたびに上記弁座に対して弁体が」二下動
じて、弁体と弁座の接触面が損傷しゃずいといった問題
もあった。Also, the above valve body simply contacts the valve seat due to its own weight.
Therefore, during transportation, etc., whenever vibration is applied to the safety valve, the valve body may move downwards against the valve seat, causing damage to the contact surface between the valve body and the valve seat. there were.
従って、本発明の目的は、上記問題を解決するごとにあ
って、設定圧力の調整及び変更作業が行いやずく、かつ
、搬送中などにおいても弁座と弁体との接触面が損傷す
ることが少ないうえに、調整範囲を広くすることができ
る安全弁を提供することにある。Therefore, an object of the present invention is to solve the above-mentioned problems, and to prevent damage to the contact surface between the valve seat and the valve body during adjustment and change of the set pressure and during transportation. It is an object of the present invention to provide a safety valve which has a wide adjustment range and has a small amount of noise.
課題を解決するだめの手段
上記目的を達成するために、本発明は、上記弁体を弁座
に対して接触させる付勢力を有する第１伺勢部材と、逆
に弁体を弁座に対して第１イマ１勢部材の（＝１勢力を
緩和させる方向にイτｊ勢する付勢力を有する第２４１
勢部材とを備えるように構成した。Means for Solving the Problems In order to achieve the above object, the present invention provides a first biasing member having a biasing force that brings the valve body into contact with the valve seat, and a first biasing member that has a biasing force that brings the valve body into contact with the valve seat. The 241st member has a biasing force of τj in the direction of relaxing the (=1 force) of the first force member.
The structure includes a biasing member.
すなわち、弁座と、下端面が」１記弁座の上端面に接離
する弁体と、該弁体の下端面を」１記弁座の上端面に対
して接触させる方向に押圧する第１４＝１勢部材と、」
１記弁体を」１記弁座に対して上記載１４−１勢部オＡ
の付勢力を緩和させる方向に伺勢する第２付勢部材とを
備えるように構成した。That is, a valve seat, a valve body whose lower end surface approaches and separates from the upper end surface of the valve seat, and a valve body that presses the lower end surface of the valve body in a direction that brings the lower end surface into contact with the upper end surface of the valve seat. 14 = 1 member,
1 Valve body 14-1 Part A described above for 1 Valve seat
and a second biasing member that biases in a direction to relieve the biasing force of.
」二足構成においては、上記弁座と上記弁体と上記載１
４−１勢部材と上記第２付勢部材がケーシング内に配置
され、上記第１付勢部材は上記ケーノンクと」１記弁体
の上部との間に縮装された圧縮ばねであるとともに、」
１記第２イゴ勢部材は」１記弁座の外面または上記ケー
シングの内面のいずれかと」１記弁体の外面との間に縮
装される圧縮はねであるように構成することもてきる。” In the two-legged configuration, the valve seat, the valve body, and the above-mentioned 1
4-1 A biasing member and the second biasing member are disposed in the casing, and the first biasing member is a compression spring compressed between the canon and the upper part of the valve body, and ”
The second biasing member may be a compression spring compressed between either the outer surface of the valve seat or the inner surface of the casing and the outer surface of the valve body. Ru.
」二足構成においては、上記弁座と」１記弁体と」１記
第１伺勢部材と上記載２付勢部材がケーシング内に配置
され、上記載１４１勢部材は上記ケーシンクと］１記弁
体の上部との間に縮装される圧縮はねであり、」１記第
２イマ］勢部（月は上記ケーシングと」１記弁体の上記
との間に備えられた引張ばねであるように構成すること
もてきる。In the two-leg configuration, the valve seat, the valve body, the first biasing member, and the second biasing member are arranged in the casing, and the 141 biasing member is connected to the casing. It is a compression spring compressed between the upper part of the valve body, and the spring is a tension spring provided between the casing and the above part of the valve body. It is also possible to configure it so that
」二足構成においては、さらに、」１記弁座の貫通穴内
にばね受（Ｊ部を備え、該ばね受け部と」１記弁体との
間に」１記第２付勢部材を縮装するとともに、上記弁体
と上記ばね受け部を軸方向移動可能に貫通ずる弁棒を備
え、該弁棒の先端部と上記ばね受（プ部との間に」１記
第１付勢部材を縮装するように構成することもてきる。In the two-leg configuration, the valve seat further includes a spring receiver (J section) in the through hole of the valve seat, and the second biasing member (1) is compressed between the spring receiver and the valve body (1). and a valve stem that passes through the valve body and the spring receiving part in an axially movable manner, and between the tip of the valve stem and the spring receiving part, a first biasing member is provided. It can also be configured to reduce the .
発明の作月り
上記構成においては、」１記第１付勢部材の付勢力によ
り上記弁体の下端面は上記弁座の上端面に接触するよう
に付勢されるとともに、上記第２イづ勢部材の付勢力に
より上記弁体は上記弁座に対して第１付勢部材の（＝１
勢力を緩和させるように（＝１勢される。In the above structure, the lower end surface of the valve body is urged to contact the upper end surface of the valve seat by the urging force of the first urging member, and the lower end surface of the valve body is urged to contact the upper end surface of the valve seat. Due to the biasing force of the biasing member, the valve body is moved against the valve seat by the biasing force of the first biasing member (=1
To soften the force (= 1 force is removed.
従って、上記第１ （＝１勢部材の４１勢力は、弁座内
の流体の所定圧力と上記第２４」勢部材のイτ］勢力と
の合計の圧力に対して均衡を保つように設定され、」二
記流体圧力が所定圧力以」二になると」１記弁体と」１
記弁座とが離れて安全弁の所定の機能を果たす。Therefore, the 41st force of the first force member is set to maintain a balance with the total pressure of the predetermined pressure of the fluid in the valve seat and the τ] force of the 24th force member. , ``2. When the fluid pressure becomes less than a predetermined pressure, ``1. The valve body.'' 1.
The valve seat is separated from the valve seat to perform the specified function of the safety valve.
穴明の効果
上記構成によれば、少なくとも上記載１（−１勢部材の
付勢力を調整することにより、安全弁の設定圧力を任意
の値に、例えばＯ，Ｉｋｇ／ｃｍ’以下の値にも容易に
設定することができる。すなわち、広範囲にわたって設
定圧力の調整を行うことができる。また、」−配設定圧
力の変更も」―記両付勢力を再調整すればよいので、設
定圧力の変更作業も簡単なものとなる。すなわち、従来
のように弁体を削り取って逐一その自重を測定する作業
が全く不要となるのである。また、上記弁体は上記第１
４＝１勢部材の付勢力により」１記弁座に対して接触さ
せるようにイτｊ勢されているので、搬送中などにおい
て安全弁に振動が作用しても容易には上下動ぜず、弁体
ど弁座との接触面の損傷を効果的に減少させることがで
きる。Effect of drilling According to the above configuration, the set pressure of the safety valve can be set to any value, for example, to a value of O, I kg/cm' or less, by adjusting the biasing force of the -1 force member as described in 1 above. It can be easily set.In other words, the set pressure can be adjusted over a wide range.Also, changing the set pressure can be done by simply readjusting the biasing force. The work is also simple. In other words, the work of scraping off the valve body and measuring its own weight one by one as in the past is completely unnecessary.In addition, the valve body is
4 = Due to the biasing force of the biasing member 1, the valve seat is biased τj so that it comes into contact with the valve seat, so even if vibrations are applied to the safety valve during transportation etc., it will not easily move up and down, and the valve will not move up or down easily. Damage to the contact surface with the valve seat can be effectively reduced.
また、上記構成において、」１記弁座と弁体と第１イマ
１勢部材と第２イτｊ勢部材をケーンンク内に配置し、
上記載１４＝１勢部材を上記ケーシングと上記弁体の上
記との間に縮装するとともに、」二記第２付勢部材を」
１記弁座の外面と」１記弁体の外面との間に縮装すれば
、弁座に対して弁体が移動して流体が弁体と弁座の隙間
との間から流出しない限り、流体が上記両付勢部材に接
触することがなく、例えは、付勢部材の腐食、付勢部材
内への固形物の残留等による両（＝１勢部材の機能損傷
を効果的に防止することができる。Further, in the above configuration, the valve seat, the valve body, the first force member, and the second force member are arranged in the cannula,
14=1 A biasing member is compressed between the casing and the valve body, and a 2nd biasing member is installed between the casing and the valve body.
If the space between the outer surface of the valve seat described in 1. and the outer surface of the valve body described in 1. , the fluid does not come into contact with both of the biasing members, effectively preventing damage to the functionality of the biasing members due to corrosion of the biasing member, solid matter remaining in the biasing member, etc. can do.
また、上記構成において、」１記弁座と」１記弁体と上
記第１付勢部材と−に記第２付勢部材をケーソンク内に
配置し、上記載１付勢部材及び上記第２付勢部材を共に
上記ケーノンクと」１記弁体の上記との間に備えるよう
にすれば、両付勢部材の付勢力を夫々調整ずろことが可
能である。Further, in the above configuration, the second biasing member described in "1 valve seat," 1 valve body, and the above first biasing member is disposed in the caisson, and the second biasing member described above and the second biasing member By providing both biasing members between the above-mentioned valve body and the above valve body, it is possible to adjust the biasing forces of both biasing members.
また、上記第１付勢部材七上記第２付勢部材の両方の付
勢力を調整することができるようにすれば、設定圧力の
調整をより細かく行うことができる。Furthermore, if the biasing forces of both the first biasing member and the second biasing member can be adjusted, the set pressure can be adjusted more precisely.
求巖霞
以下に、本発明にかかる実施例を第１〜４図に基づいて
詳細に説明する。Embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 4.
本実施例にかかる安全弁は、第１図に示すように、弁座
１と、下端面３ａが」１記弁座ｌの上端面１ａに接離す
る弁体３と、該弁体３の下端面３ａを上記弁座１の上端
面１ａに対して接触させる方向に押圧する第１付勢部材
としての第１圧縮ばね４と、」１記弁体３を上記弁座１
に対して」−２第１圧縮ばね４の付勢力を緩和させる方
向に（＝Ｊ勢する第２付勢部材としての第２圧縮ばね５
とを備えて大略構成する。本実施例並びに後記する各実
施例は、いずれもいわゆる超微圧用安全弁（例えば、設
定圧力をＯ，１ｋｇ７ｃｍ２以下にするもの）として好
適なものである。As shown in FIG. 1, the safety valve according to this embodiment includes a valve seat 1, a valve body 3 whose lower end surface 3a approaches and separates from the upper end surface 1a of the valve seat 1, and a lower end surface 3a of the valve body 3. a first compression spring 4 as a first biasing member that presses the end surface 3a in a direction to bring the end surface 3a into contact with the upper end surface 1a of the valve seat 1;
-2 The second compression spring 5 as the second biasing member exerts a force in the direction of relaxing the biasing force of the first compression spring 4 (=J force)
It is roughly composed of: This embodiment and each of the embodiments to be described later are suitable as so-called ultra-low pressure safety valves (for example, those with a set pressure of 0,1 kg, 7 cm 2 or less).
」１記弁座１は、その中央部に流体が流動可能な貫通穴
１ ｂを有し、該貫通穴１ｂの上端部開口周囲の下端面
１ａを弁座面とし、該上端面１ａの周囲部分てかつ上端
面１ａより下方にはね受け面１ｃを有する。1. The valve seat 1 has a through hole 1 b in the center thereof through which fluid can flow, the lower end surface 1 a around the upper end opening of the through hole 1 b is the valve seat surface, and the periphery of the upper end surface 1 a is The partial lever has a splash receiving surface 1c below the upper end surface 1a.
上記弁体３は、その下端面３ａの外周部か上記弁座ｌの
上端面１ａに接離する一方、弁体３の上部に、−に而よ
り下端面側に向けて四部３ｂを形成する。この弁体３は
上記ケーシング２に対してその上記が軸方向に移動可能
に嵌合されて、弁体３の側面のうち上記外周側面３ｄか
」１記ケーシング２の内周側面２ａに対して摺動できる
ようにする。The outer circumference of the lower end surface 3a of the valve body 3 comes into contact with and separates from the upper end surface 1a of the valve seat l, while four parts 3b are formed in the upper part of the valve body 3 toward the lower end surface side. . This valve body 3 is fitted into the casing 2 so that its upper part is movable in the axial direction, and the outer circumferential side 3d of the side surfaces of the valve body 3 is connected to the inner circumferential side 2a of the casing 2. Allow it to slide.
また、弁体３の側面の中央部にばばね受け部３ｃを形成
して、該ばね受け部３ｃと」１記弁座１のばね受け而１
ｃとの間に上記載２圧縮ばね５を縮装する。Further, a spring receiving part 3c is formed in the center of the side surface of the valve body 3, and the spring receiving part 3c and the spring receiving part 1 of the valve seat 1 are connected to each other.
The above two compression springs 5 are compressed between the two compression springs 5 and c.
」１記弁体３の四部３ｂの底面と、該凹部３ｂの」一方
でかつケーシング２内に上下動可能に収納されたばね受
り板６との間に（Ｊ上記第１圧縮ばね４を縮装する。1. Between the bottom surface of the four parts 3b of the valve body 3 and the spring receiving plate 6, which is housed on one side of the recessed part 3b and movable up and down in the casing 2 (J, the first compression spring 4 is compressed). to wear
上記ケーシング２（Ｊその上記に小径部２ｒを形成し、
該小径部２ｆの直ぐ下方に上記ばね受（Ｊ板６を配置す
るとともに、該小径部２ｒ内面にねじ部２ｄと嵌合穴部
２ｃとを形成する。この小径部２ｆ内には、そのねじ部
２ｄと螺合するねじ部８ｂを有する調整ねじ８を嵌合・
保持する。この調整ねじ８の下部外周面で」二記嵌合穴
部２ｃ内に嵌合される部分には０リング７を嵌合してケ
ーシング２内を密閉させる。」１記調整ねじ８の下端部
８ａは円錐形状に形成して、その先端を上記ばね受け板
６の上面中央凹部６ａに当接させる。この調整ねじ８は
止めナツト９により所望の調整位置でケーシング２に対
して位置決めされる。従って、上記止めナツト９を緩め
て上記調整ねじ８を回転させてケーシング２内にねじ込
むことにより、ばね受け板６が下降して上記第１圧縮ば
ね４の付勢力を大きくする一方、」１記調整ねじ８を逆
方向に回転させてケーシング２から抜き出ず方向に」―
昇さ■ると、上記ばね受（プ板６か上昇して」二記載１
圧縮ばね４の付勢力が小さくなる。なお、図中、２ｂは
流体排出口である。A small diameter portion 2r is formed above the casing 2 (J),
The spring receiver (J plate 6) is arranged immediately below the small diameter portion 2f, and a threaded portion 2d and a fitting hole portion 2c are formed on the inner surface of the small diameter portion 2r. Fit the adjusting screw 8 having a threaded portion 8b that screws into the portion 2d.
Hold. An O-ring 7 is fitted into the portion of the lower outer circumferential surface of the adjusting screw 8 that is fitted into the fitting hole 2c, thereby sealing the inside of the casing 2. 1. The lower end 8a of the adjustment screw 8 is formed into a conical shape, and its tip is brought into contact with the upper center recess 6a of the spring receiving plate 6. This adjustment screw 8 is positioned relative to the casing 2 in the desired adjustment position by means of a locking nut 9. Therefore, by loosening the locking nut 9 and rotating the adjusting screw 8 and screwing it into the casing 2, the spring receiving plate 6 is lowered to increase the biasing force of the first compression spring 4, while Rotate the adjustment screw 8 in the opposite direction to avoid pulling it out of the casing 2.
When it rises, the spring holder (Plate 6) will rise.
The biasing force of the compression spring 4 becomes smaller. In addition, in the figure, 2b is a fluid outlet.
」１記構成によれば、上記第１圧縮ばね４の付勢力を上
記第２圧縮ばね５の（＝１勢力と弁座ｌ内の所定の流体
圧力とにつり合うように、すなわち、設定圧力でもって
上記弁体３が弁座ｌに接触するように調整する。この状
態で、流体の圧力が上昇し所定圧力を越えると、」−２
弁体３か上記第１圧縮はね４の付勢力に抗して上昇し、
流体が弁座１の貫通穴１１）内から弁座１と弁体３の隙
間を通って排出口２＋１に流れる。According to configuration 1, the biasing force of the first compression spring 4 is balanced with the (=1 force of the second compression spring 5) and the predetermined fluid pressure in the valve seat l, that is, at the set pressure. Adjust so that the valve body 3 comes into contact with the valve seat l. In this state, if the fluid pressure rises and exceeds a predetermined pressure, "-2
The valve body 3 rises against the biasing force of the first compression spring 4,
Fluid flows from the through hole 11) of the valve seat 1 through the gap between the valve seat 1 and the valve body 3 to the outlet 2+1.
」１記実施例によれば、」二記載１圧縮ばね４の付勢力
と上記第２圧縮ばね５の（＝１勢力とを調整することに
より、安全弁の設定圧力を任意の値に、例えばＯ，１ｋ
ｇ／ｃｍ２以下の値にも容易に設定することかでき、広
範囲にわたって設定圧力の調整を行うことができるとと
もに、」―配設定圧力の変更も」二記載１圧縮ばね４の
付勢力を再調整すればよいので、設定圧力の変更作業も
簡単なものとなる。According to the embodiment described in ``1'', the setting pressure of the safety valve can be set to an arbitrary value, for example, O ,1k
It can be easily set to a value of g/cm2 or less, and the set pressure can be adjusted over a wide range, and the biasing force of the compression spring 4 can also be readjusted. This simplifies the task of changing the set pressure.
すなわち、従来のように弁体を削り取って逐一その自重
を測定する作業が全く不要となるのである。In other words, there is no need for the conventional work of scraping off the valve body and measuring its own weight one by one.
また、」−２弁体３は」二記載１圧縮はね４の付勢力に
より上記弁座ｌに対して接触させるように付勢されてい
るので、搬送中などにおいて安全弁に振動が作用しても
容易には上下動せず、弁体３と弁座１との接触面の損傷
を効果的に減少させることができる。また、上記第１圧
縮ばね４は弁体３の凹部３ｂ内に配置されるとともに、
」二記載２圧縮ばね５が弁座ｌの外部に配置されている
ので、安全弁が作動しない通常状態では流体が上記両圧
縮ばね４，５に接触することがなく、圧縮ばね４，５の
機能を損なうことがない。すなわち、例えば、ばねの腐
食、ばねの内部に固形物が残留することなどによるばね
の機能損傷を効果的に防止することができる。In addition, since the valve body 3 is urged to contact the valve seat l by the urging force of the compression spring 4 described in 2, vibrations may act on the safety valve during transportation or the like. The valve body 3 does not move up and down easily, and damage to the contact surface between the valve body 3 and the valve seat 1 can be effectively reduced. Further, the first compression spring 4 is disposed within the recess 3b of the valve body 3, and
Since the compression spring 5 is disposed outside the valve seat l, the fluid does not come into contact with the compression springs 4 and 5 in the normal state when the safety valve does not operate, and the function of the compression springs 4 and 5 is improved. without damaging it. That is, it is possible to effectively prevent functional damage to the spring due to, for example, corrosion of the spring or solid matter remaining inside the spring.
本発明は上記実施例に限定されるものではなく、その他
種々の態様で実施できる。なお、以下の実施例では」１
記実施例と同一部品には同一符号を（１して説明を省略
する。The present invention is not limited to the above embodiments, but can be implemented in various other ways. In addition, in the following examples, "1"
Components that are the same as those in the above embodiment are denoted by the same reference numerals (1) and their description will be omitted.
例えば、」二記載１図において、第２圧縮ばね５の下端
部を弁座側ではなくケーシング２の内面で受けるように
してもよい。For example, in Figure 1 described in ``2'', the lower end of the second compression spring 5 may be received on the inner surface of the casing 2 instead of on the valve seat side.
また、第２図に示すように、上記第２圧縮ばね５を、−
１−記弁座１の貫通穴１ｂの内周面のばね受Ｕ部１ｄと
」−２弁体３の下部に」二向きに形成した四部３「の底
面との間に縮装させるようにしてもよい。なお、図中、
１１はケーシング２内の小径段部２ｅに嵌合されて弁体
３の軸方向の移動を案内する案内筒、＋２８；ｌケーシ
ング２の上端部を覆う蓋であって、案内筒１１の内周面
＋１ｄに対して」−２弁体３の外周側面３ｄが摺動する
ようにする。この案内筒ＩＩの内周面＋１６の上端部に
はめねじ部１１ｂを形成し、このめねじ部１１ｂに、」
二記載１圧縮ばね４の上端部を受けるばね受けリング１
０の外周面のねじ部１０ａが螺合する。従って、ばね受
（Ｊリング１０を回転させて案内筒１１に対して」二下
動させることにより上記第１圧縮ばね４の付勢力を調整
することができる。上記案内筒１１の」二端部外周面に
はおねし部１１ｃを形成し、このおねじ部１１ｃが」二
記ケーノンク２の上端部内周面のめねし部２ｄに螺合す
るとともに、」−詞藻Ｉ２の外周面のおねじ部１２ａも
」二記ケーノンク２のめねし部２（］に螺合する。なお
、案内筒ＩＩにはその側面に貫通孔１１ａを貫通させて
案内筒ＩＩ円内外流体が自由に出入りするようにする。Further, as shown in FIG. 2, the second compression spring 5 is -
1-The spring receiver U portion 1d on the inner circumferential surface of the through hole 1b of the valve seat 1 is compressed between the bottom surface of the fourth portion 3 formed in two directions at the bottom of the valve body 3. In addition, in the figure,
11 is a guide cylinder that is fitted into the small-diameter stepped portion 2e in the casing 2 and guides the movement of the valve body 3 in the axial direction; The outer peripheral side surface 3d of the -2 valve body 3 is made to slide against the surface +1d. A female threaded portion 11b is formed at the upper end of the inner circumferential surface +16 of this guide tube II, and this female threaded portion 11b has a
2 Description 1 Spring receiving ring 1 that receives the upper end of the compression spring 4
The threaded portion 10a on the outer circumferential surface of 0 is screwed together. Therefore, the biasing force of the first compression spring 4 can be adjusted by rotating the spring receiver (J-ring 10 and moving it downward with respect to the guide tube 11).The two ends of the guide tube 11 A male threaded portion 11c is formed on the outer circumferential surface, and this male threaded portion 11c is screwed into a female threaded portion 2d on the inner circumferential surface of the upper end portion of the cannon link 2. The part 12a is also screwed into the female part 2 ( ) of the cannon 2. The guide tube II has a through hole 11a in its side surface so that the fluid inside and outside the guide tube II can freely enter and exit the guide tube II. Make it.
また、他の実施例として第３図に示すようなものでもよ
い。すなわち、この実施例では」二記載２圧縮ばね５の
代わりに引張ばね１３を使用する。Further, as another embodiment, the one shown in FIG. 3 may be used. That is, in this embodiment, a tension spring 13 is used in place of the compression spring 5 described in "2".
この引張ばね１３は、その下端部が、上記弁体３の四部
３ｂ底面のねじ穴３ｅに螺合された係止片１４に係止さ
れるとともに、その上端部が、上記ケーシング２の上記
に取り（＝ｔ ＩＪられた蓋１５を貫通ずる調整ねじ１
６の下端係止部１６ａに係止され、弁体３をケーシング
２に対して」１昇させる方向に、ずなわち弁体３を弁座
ｌに対して」二記載１圧縮ばね４の付勢力を緩和さＵる
方向に付勢する。」二詞藻１５の下部外周面にはおねじ
部１５ａを形成し、該おねし部１５ａか」二記ケーノン
ク２の」１記めねじ部２ｄに螺合する。上記蓋１６の中
央部には貫通穴１５ｃを形成し、複数のリブ１５ｂを貫
通穴Ｉ５ｃを有する中央部の周囲に形成し、リブ１５ｂ
とリブ１５ｂとの間に（」隙間を形成させて、この隙間
を通って外気がグーソング２内に自由に出入りするよう
にする。上記蓋１５の貫通穴１５ｃには」―記調整ねじ
１６が」二下動自在に嵌合され、該調整ねじ１６の外周
面のおねじ部＋６ｂには調整ナツト１７と止めナツト１
８とが螺合される。従って、止めナツト１８を緩めて調
整ナツト１７を回転さ且゛ることにより、調整ねし１６
がケーシング２に対して」−下動して」二記引張ばね１
３の付勢力を調整ｄ−ることかでき、調整後、止めナソ
ｌ−１８で調整ねじＩ６をケーシング２に固定する。一
方、上記第１圧縮ばね４の付勢力は上記ばね受１ノリン
グ１０を案内筒１１に対して上下動させることにより任
意に調整することができる。本実施例では、第１圧縮ば
ね４と引張ばねＩ３の両方の付勢力を夫々調整すること
ができ、設定圧力の調整をより細かく行うことができる
。また、案内筒１１の下端部外周面とケーシング２の内
周面との間にダイヤフラム等を取り（１けることにより
、流体か上記両ばね４，１３に全く接触しないようにす
ることもてきる。The lower end of the tension spring 13 is engaged with a locking piece 14 screwed into the screw hole 3e on the bottom of the four parts 3b of the valve body 3, and the upper end thereof is attached to the above of the casing 2. Adjustment screw 1 that passes through the lid 15 that has been removed (=t)
6, and in the direction of raising the valve body 3 with respect to the casing 2, that is, with respect to the valve seat l. Forces the force in a direction that reduces it. A male threaded portion 15a is formed on the lower outer circumferential surface of the two-piece seaweed 15, and the male threaded portion 15a is screwed into the female threaded portion 2d of the two-piece cannon 2. A through hole 15c is formed in the center of the lid 16, and a plurality of ribs 15b are formed around the center having the through hole I5c.
A gap is formed between the rib 15b and the outside air to freely enter and exit the goo song 2 through this gap. The adjustment nut 17 and the locking nut 1 are fitted to the male threaded portion +6b on the outer circumferential surface of the adjustment screw 16.
8 are screwed together. Therefore, by loosening the locking nut 18 and rotating the adjusting nut 17, the adjusting nut 16 can be adjusted.
moves downwards with respect to casing 2, and tension spring 1
After adjustment, the adjusting screw I6 is fixed to the casing 2 with the locking naso L-18. On the other hand, the biasing force of the first compression spring 4 can be arbitrarily adjusted by moving the spring receiver 1 knob 10 up and down with respect to the guide tube 11. In this embodiment, the biasing forces of both the first compression spring 4 and the tension spring I3 can be adjusted respectively, and the set pressure can be adjusted more finely. Furthermore, by installing a diaphragm or the like between the outer peripheral surface of the lower end of the guide tube 11 and the inner peripheral surface of the casing 2, it is possible to prevent the fluid from coming into contact with the above-mentioned springs 4, 13 at all. .
さらに、本発明は第４図に示すような開放型の安全弁に
も適用することができる。この安全弁は、弁座１９の上
記開口を弁体２０で覆うように配置し、上記弁座１９の
上端面（弁座面）１９ａは上記弁体２０の下端面として
の０リンク２０ａに接離するようにしている。この弁座
１９の貫通穴１９ｂ内の中央部にはリブＩ ９ｄ、−、
Ｉ ９ｄで支持されたばね受（プ部１９ｃを備え、該ば
ね受（プ部１９ｃと上記弁体２０の中央部とに弁棒２１
を軸方向に移動可能に貫通させる。この弁棒２１の下端
部２１ｂ近傍に嵌合したばね受１プリング２３と」二記
弁座１９のばね受（１部１９ｃの下面との間に第Ｎτｊ
勢部材としての第１圧縮ばね２２を縮装する。また、」
二記弁体２０の中央部内面と上記弁座１９のばね受け部
１９ｃの上面との間に第２付勢部材としての第２圧縮ば
ね２４を縮装する。上記弁棒２Ｉはその上記部の外周面
におねじ部２１ａを形成し、該おねじ部２１ａに調整ナ
ツト２６を螺合させる。Furthermore, the present invention can also be applied to an open type safety valve as shown in FIG. This safety valve is arranged so that the opening of the valve seat 19 is covered by the valve body 20, and the upper end surface (valve seat surface) 19a of the valve seat 19 approaches and separates from the 0 link 20a as the lower end surface of the valve body 20. I try to do that. At the center of the through hole 19b of the valve seat 19 are ribs I9d, -,
The valve stem 21 is provided with a spring bearing (pull part 19c) supported by the spring bearing (pull part 19c) and the center part of the valve body 20.
penetrated so as to be movable in the axial direction. The Nτjth
The first compression spring 22 as a biasing member is compressed. Also,"
A second compression spring 24 as a second biasing member is compressed between the inner surface of the center portion of the second valve body 20 and the upper surface of the spring receiving portion 19c of the valve seat 19. The valve rod 2I has a threaded portion 21a formed on the outer circumferential surface of the above-mentioned portion thereof, and an adjustment nut 26 is screwed into the male threaded portion 21a.
従って、上記調整ナツト２６を回転させることに＝１６
−
にす上記弁棒２１か弁体２０及び弁座１９に対して」二
下動して、上記第１圧縮ばね２２の付勢力を調整するこ
とができる。なお、２５はＯリングである。この実施例
では、流体圧力が所定圧力以」二になると、上記第１圧
縮ばね２２の付勢力に抗して」二記弁体２０並ひに弁棒
２１を弁座１９に対して」−昇させ、弁座１９内の流体
を弁座１９と弁体２０との隙間から外部に排出させる。Therefore, rotating the adjusting nut 26 = 16
- The biasing force of the first compression spring 22 can be adjusted by moving the valve stem 21 downward by two degrees with respect to the valve body 20 and valve seat 19. Note that 25 is an O-ring. In this embodiment, when the fluid pressure reaches a predetermined pressure or higher, the valve body 20 and the valve stem 21 are moved against the valve seat 19 against the biasing force of the first compression spring 22. The fluid in the valve seat 19 is discharged to the outside through the gap between the valve seat 19 and the valve body 20.
また、具体的には図示しないが、上記第１付勢部材及び
第２付勢部材としては、夫々、皿ばねなと公知のばねを
用いることもてきる。Further, although not specifically shown in the drawings, well-known springs such as disc springs may be used as the first biasing member and the second biasing member, respectively.
以」二、詳記したように、」１記いずれの実施例におい
ても本発明の所期の目的を十分に達成することができる
。As described in detail in ``2'' below, the intended purpose of the present invention can be fully achieved in any of the embodiments described in ``1.''.
第１図は本発明の一実施例にかかる安全弁を示す一部切
欠縦断面図、第２図は他の実施例にかかる安全弁の一部
切欠縦断面図、第３図はさらに他の実施例にかかる安全
弁を示す一部切欠縦断面図、第４図（」本発明を開放型
安全弁に適用した実施例にかがる安全弁の半断面図、第
５図は従来の安全弁の半断面図である。
ｌ−弁座、１ａ 上端面、１ｂ 貫通穴、１ｃばね受け
而、１ｄ ばね受ＩＪ部、２ ケージング、２ａ 内周
側面、２１）排出口、２ｃ・嵌合穴、２（１めねじ部、
２ｅ・小径段部、２ｆ 小径部、３弁体、３ａ・下端面
、３ｂ 凹部、３ｃ・ばね受け部、３ｄ 外周側面、３
ｅ ねし穴、３ｒ 四部、４ 第１圧縮ばね、５ ・第
２圧縮ばね、６ ばね受＋−１板、７０リング、訃・調
整ねじ、９ 止めナツト、１０ ばね受けリンク、ＩＩ
案内筒、１２−蓋、１３ 引張ばね、１４ 係止片、
１５・蓋、１６ 調整ねし、１７ 調整ナツト、Ｉ８止
めナンド、１９ 弁座、１９ａ・上端面、１９ｃ・ばね
受け部、２０ 弁体、２０ａ・上端面、２１ 弁棒、２
２ 第１圧縮ばね、２３ ばね受けリンク、２４ ・第
２圧縮ばね、２５−０リンク、２６調整サント。
特許出願人 株式会社 ミハナ製作所
代理人 弁理士 青山 葆 ほか２名
第４図
□
第５図
１ｓｔ） ２１ｔ）FIG. 1 is a partially cutaway longitudinal cross-sectional view showing a safety valve according to one embodiment of the present invention, FIG. 2 is a partially cutaway longitudinal cross-sectional view of a safety valve according to another embodiment, and FIG. 3 is a further another embodiment. FIG. 4 is a partially cutaway vertical sectional view showing a safety valve according to an embodiment of the present invention; FIG. 5 is a half sectional view of a conventional safety valve; There is. l-valve seat, 1a upper end surface, 1b through hole, 1c spring receiver, 1d spring receiver IJ part, 2 casing, 2a inner peripheral side, 21) discharge port, 2c fitting hole, 2 (1 female thread) Department,
2e・Small diameter stepped portion, 2f Small diameter portion, 3 Valve body, 3a・Lower end surface, 3b Recessed portion, 3c・Spring receiving portion, 3d Outer peripheral side surface, 3
e Screw hole, 3r 4 parts, 4 1st compression spring, 5 ・2nd compression spring, 6 Spring bearing +-1 plate, 70 ring, end/adjustment screw, 9 Set nut, 10 Spring bearing link, II
Guide tube, 12-lid, 13 tension spring, 14 locking piece,
15・Lid, 16 Adjustment screw, 17 Adjustment nut, I8 stopper, 19 Valve seat, 19a・Top end surface, 19c・Spring receiver, 20 Valve body, 20a・Top end surface, 21 Valve stem, 2
2 First compression spring, 23 Spring receiving link, 24 - Second compression spring, 25-0 link, 26 Adjustment sunt. Patent applicant Mihana Seisakusho Co., Ltd. Agent Patent attorney Aoyama Aoyama and 2 others Figure 4 □ Figure 5 1st) 21t)
Claims (4)
上記弁座（１、１９）の上端面（１ａ、１９ａ）に接離
する弁体（３、２０）と、該弁体（３、２０）の下端面
（３ａ、２０ａ）を上記弁座（１、１９）の上端面（１
ａ、１９ａ）に対して接触させる方向に押圧する第１付
勢部材（４、２２）と、上記弁体（３、２０）を上記弁
座（１、１９）に対して上記第１付勢部材（４、２２）
の付勢力を緩和させる方向に付勢する第２付勢部材（５
、１３、２４）とを備えるようにしたことを特徴とする
安全弁。(1) A valve seat (1, 19), a valve body (3, 20) whose lower end surface (3a, 20a) approaches and separates from the upper end surface (1a, 19a) of the valve seat (1, 19); The lower end surface (3a, 20a) of the valve body (3, 20) is connected to the upper end surface (1) of the valve seat (1, 19).
a, 19a), and a first biasing member (4, 22) that presses the valve body (3, 20) in a direction to bring it into contact with the valve seat (1, 19). Parts (4, 22)
A second biasing member (5
, 13, 24).
部材（４）と上記第２付勢部材（５）がケーシング（２
）内に配置され、上記第１付勢部材（４）は上記ケーシ
ング（２）と上記弁体（３）の上部との間に縮装された
圧縮ばねであるとともに、上記第２付勢部材（５）は上
記弁座（１）の外面または上記ケーシング（２）の内面
のいずれかと上記弁体（３）の外面との間に縮装される
圧縮ばねであるようにした特許請求の範囲第１項に記載
の安全弁。(2) The valve seat (1), the valve body (3), the first biasing member (4), and the second biasing member (5) are connected to the casing (2).
), the first biasing member (4) is a compression spring compressed between the casing (2) and the upper part of the valve body (3), and the second biasing member Claim (5) is a compression spring compressed between either the outer surface of the valve seat (1) or the inner surface of the casing (2) and the outer surface of the valve body (3). Safety valve as described in paragraph 1.
部材（４）と上記第２付勢部材（１３）がケーシング（
２）内に配置され、上記第１付勢部材（４）は上記ケー
シング（２）と上記弁体（３）の上部との間に縮装され
る圧縮ばねであり、上記第２付勢部材（１３）は上記ケ
ーシング（２）と上記弁体（３）の上部との間に備えら
れた引張ばねであるようにした特許請求の範囲第１項に
記載の安全弁。(3) The valve seat (1), the valve body (3), the first biasing member (4), and the second biasing member (13) are connected to the casing (
2), the first biasing member (4) is a compression spring compressed between the casing (2) and the upper part of the valve body (3), and the second biasing member The safety valve according to claim 1, wherein (13) is a tension spring provided between the casing (2) and the upper part of the valve body (3).
け部（１９ｃ）を備え、該ばね受け部（１９ｃ）と上記
弁体（２０）との間に上記第２付勢部材（２４）を縮装
するとともに、上記弁体（２０）と上記ばね受け部（１
９ｃ）を軸方向移動可能に貫通する弁棒（２１）を備え
、該弁棒（２１）の先端部（２３）と上記ばね受け部（
１９ｃ）との間に上記第１付勢部材（２２）を縮装する
ようにした特許請求の範囲第１項に記載の安全弁。(4) A spring receiving portion (19c) is provided in the through hole (19b) of the valve seat (19), and the second biasing member is provided between the spring receiving portion (19c) and the valve body (20). (24), and the valve body (20) and the spring receiving part (1).
9c), which passes through the valve stem (21) in an axially movable manner, and the tip (23) of the valve stem (21) and the spring receiving portion (
19c) The safety valve according to claim 1, wherein the first biasing member (22) is compressed between the first biasing member (22) and the first biasing member (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11777188A JPH01288671A (en) | 1988-05-12 | 1988-05-12 | Safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11777188A JPH01288671A (en) | 1988-05-12 | 1988-05-12 | Safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01288671A true JPH01288671A (en) | 1989-11-20 |
Family
ID=14719920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11777188A Pending JPH01288671A (en) | 1988-05-12 | 1988-05-12 | Safety valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01288671A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0540668U (en) * | 1991-10-30 | 1993-06-01 | 三輪精機株式会社 | Poppet valve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5217136U (en) * | 1975-07-22 | 1977-02-07 |
-
1988
- 1988-05-12 JP JP11777188A patent/JPH01288671A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5217136U (en) * | 1975-07-22 | 1977-02-07 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0540668U (en) * | 1991-10-30 | 1993-06-01 | 三輪精機株式会社 | Poppet valve |
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