JPH0353091Y2 - - Google Patents
Info
- Publication number
- JPH0353091Y2 JPH0353091Y2 JP1984131946U JP13194684U JPH0353091Y2 JP H0353091 Y2 JPH0353091 Y2 JP H0353091Y2 JP 1984131946 U JP1984131946 U JP 1984131946U JP 13194684 U JP13194684 U JP 13194684U JP H0353091 Y2 JPH0353091 Y2 JP H0353091Y2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- valve
- lpg
- valve seat
- limit pressure
- 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
Links
- 239000003915 liquefied petroleum gas Substances 0.000 claims description 35
- 239000007789 gas Substances 0.000 claims description 24
- 230000007246 mechanism Effects 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 239000012071 phase Substances 0.000 description 23
- 239000007791 liquid phase Substances 0.000 description 11
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Control Of Fluid Pressure (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は例えば貯槽内に収容された液化石油
ガス(以下「LPG」という)を気相及び液相ラ
インの双方より取り出し得るようにしたLPGの
供給装置に使用され、特に気相ラインに取付けら
れて入口及び出口側の流体圧力が一定範囲を越え
ると自圧によつて遮断し得るようにした圧力制御
弁に関する。[Detailed description of the invention] [Industrial application field] This invention is an example of an LPG in which liquefied petroleum gas (hereinafter referred to as "LPG") stored in a storage tank can be taken out from both the gas phase and liquid phase lines. The present invention relates to a pressure control valve which is used in a supply device, and which is particularly attached to a gas phase line so that it can be shut off by its own pressure when the fluid pressure on the inlet and outlet sides exceeds a certain range.
従来のLPG供給装置は、気相ラインからの取
り出し圧力が低下しても、これを効果的に遮断す
る圧力制御弁が開発されていなかつたから、所謂
液相ライン主導型のものに限られていた。
Conventional LPG supply equipment was limited to so-called liquid-phase line-driven systems because no pressure control valve had been developed to effectively shut off the drop in extraction pressure from the gas-phase line. .
上記従来の液相ライン主導型のLPG供給装置
によれば、液相ラインから気化ガスを取り出すに
は、別途蓄圧タンクの他、その減圧や圧力制御等
のために複雑な構造の圧力制御弁を必要とする
(例えば特開昭51−2019号参照)だけでなく、そ
の殆どが蒸発器による強制気化でまかなわれるた
め、電力消費量が莫大でLPGの供給コストが高
価になるなどの課題があつた。
According to the above-mentioned conventional liquid phase line-driven LPG supply device, in order to extract vaporized gas from the liquid phase line, in addition to a separate pressure storage tank, a pressure control valve with a complicated structure is required for pressure reduction and pressure control. Not only does it require a large amount of electricity (for example, see Japanese Patent Application Laid-Open No. 51-2019), but most of it is covered by forced vaporization using an evaporator, which poses problems such as huge power consumption and high LPG supply costs. Ta.
そこで本考案は、気相ラインの圧力変化に即応
して該流体を遮断し、液相ラインとの切換えを自
圧で行い得るようにした自力圧力制御弁を開発し
て、気相ライン主導型のLPG供給装置とするこ
とを可能ならしめたものである。 Therefore, the present invention has developed a self-powered pressure control valve that immediately responds to pressure changes in the gas phase line, shuts off the fluid, and can switch to and from the liquid phase line using its own pressure. This makes it possible to use this as an LPG supply device.
本考案は上述の目的を達成するため、機筐の一
側に、入口より流入する流体圧によつて作動する
下限圧設定用のダイヤフラム弁を設け、該ダイヤ
フラム弁と連携して流入圧が下限値を下回れば弁
体を閉止する下限圧力遮断機構を組込む一方、機
筐の他側には、出口付近の流体圧が設定された上
限値を越えれば作動する上限圧設定用のダイヤフ
ラム弁を介して、その弁体を閉止可能とした上限
圧力遮断機構の弁座筒を上記下限圧力遮断機構の
弁座筒と対置して設けるという手段を用いて、一
定圧力範囲の気相ガスのみを本管側に供給可能と
したものである。
In order to achieve the above-mentioned purpose, the present invention provides a diaphragm valve on one side of the machine casing for setting the lower limit pressure that is operated by the fluid pressure flowing in from the inlet, and works in conjunction with the diaphragm valve to set the inflow pressure to the lower limit. A lower limit pressure cut-off mechanism is installed that closes the valve body when the pressure falls below the specified limit, while a diaphragm valve for setting the upper limit pressure is installed on the other side of the machine housing, which operates when the fluid pressure near the outlet exceeds the set upper limit. By using a method in which the valve seat tube of the upper limit pressure cutoff mechanism that can close the valve body is placed opposite to the valve seat tube of the lower limit pressure cutoff mechanism, only gas phase gas within a certain pressure range can be supplied to the main pipe. This means that it can be supplied to both sides.
上述した本案入・排出流の自力式圧力制御弁
は、上記両圧力遮断機構の各ダイヤフラム弁によ
り、その入口側は所定圧以下のLPGによつて閉
止し、また出口側では出口付近のLPGの圧力が
設定値を越えた場合に閉止するようにして、本管
側に供給される気相ラインのLPGを自力で所定
の圧力範囲に調整するという格別の作用を有する
ものである。
The above-mentioned self-operated pressure control valve for main flow inlet and outlet flow is closed on the inlet side by LPG at a predetermined pressure or less by each diaphragm valve of the above-mentioned double pressure cutoff mechanism, and on the outlet side, it is closed by LPG near the outlet. It has the special effect of automatically adjusting the LPG in the gas phase line supplied to the main pipe to a predetermined pressure range by closing when the pressure exceeds a set value.
以下、本案自力式圧力制御弁の構成を図面に示
すLPG供給装置に使用した場合の実施例に従つ
て更に詳述すると、1はその機筐、2は上記機筐
の下側方、即ち上流側に開口する入口、3は上記
入口2と連通する透孔3aとその上部内面に弁座
3bを有する弁座筒、又4は常態ではスプリング
4aを介して上記弁座3bに当接可能とした弁体
4bとその下部を連動子4cを介してダイヤフラ
ム4dに接続してなる下限圧設定用のダイヤフラ
ム弁であつて、上記弁座筒の透孔3aが入口2に
臨むように筐体1内に組み込み、流入するLPG
の圧力が設定値より低下した場合に伸長するバネ
4eを介して連動子4cを押上げ、弁体下部との
係合を弛緩させるので、弁体4bがスプリング4
aの弾発力で弁座3bに当接し、入口2からの
LPGの流入を阻止する下限圧力遮断機構を構成
したものである。
Hereinafter, the configuration of the self-powered pressure control valve of the present invention will be described in more detail according to an example in which it is used in an LPG supply device shown in the drawings. 3 is a valve seat cylinder having a through hole 3a communicating with the inlet 2 and a valve seat 3b on the inner surface of the upper part; 4 is a valve seat cylinder that can normally come into contact with the valve seat 3b via a spring 4a; This is a diaphragm valve for setting a lower limit pressure, which has a valve body 4b and its lower part connected to a diaphragm 4d via an interlocking element 4c. LPG incorporated into and flowing into
When the pressure of
It contacts the valve seat 3b with the elastic force of a, and the flow from the inlet 2
It is configured with a lower limit pressure cutoff mechanism that prevents the inflow of LPG.
また5は上記機筐1の上側方、即ち下流側に開
設された出口6と透孔5aを介して連通するよう
に筐体内に組み込まれた弁座筒、7は上限圧設定
用のダイヤフラム弁であつて、その弁体7aが該
弁体7aの上端に設けられたバネ7cを介して押
下げられるダイヤフラム7dに接合して、常態で
はスプリング7bが弾縮されて上記弁座筒下端の
弁座5bから開離するようにし、出口6付近の
LPGの排出流の圧力が設定値以上に上昇した場
合に弁体7aを閉止し、LPGの本管12側への
流出を阻止するようにした上限圧力遮断機構を構
成したものである。尚、図中8は上記各ダイヤフ
ラム弁4,7の圧力設定用のネジ、又9はプレツ
シヤーゲージを示す。 Further, 5 is a valve seat cylinder built into the housing so as to communicate with an outlet 6 opened on the upper side of the machine housing 1, that is, on the downstream side, via a through hole 5a, and 7 is a diaphragm valve for setting the upper limit pressure. The valve body 7a is joined to a diaphragm 7d which is pushed down via a spring 7c provided at the upper end of the valve body 7a, and under normal conditions, the spring 7b is elastically compressed to close the valve at the lower end of the valve seat cylinder. so that it opens from the seat 5b, and near the exit 6.
An upper limit pressure cutoff mechanism is configured to close the valve body 7a and prevent LPG from flowing to the main pipe 12 side when the pressure of the LPG discharge stream rises above a set value. In the figure, reference numeral 8 indicates a pressure setting screw for each of the diaphragm valves 4 and 7, and reference numeral 9 indicates a pressure gauge.
次に、本案自力式圧力制御弁をLPGの供給装
置の気相ライン13に取り付けて気相ライン主導
型とした場合の該供給装置の作動について述べる
と、第2図において、貯槽10内の気相圧力を
(P1)、蒸発器11の入口側圧力を(P2)、また本
管12の供給圧力を(P3)とした場合、供給圧
力(P3)を保証するためには蒸発器11の入口
側圧力(P2)は(P3+X)Kg/cm2以上でなけれ
ばならないが、今、
P3=0,7Kg/cm2、X=1Kg/cm2
と仮定すると、(P2)の必要最小圧力は、外気温
度やLPGの組成により変化する気相圧力(P1)
を加味して一般に、
P2≧{(P3+X)+α}=(1,7+α)Kg/cm2
で表される。 Next, we will discuss the operation of the LPG supply device when the self-powered pressure control valve of the present invention is attached to the gas phase line 13 of the LPG supply device to make it a gas phase line-driven type. When the phase pressure is (P 1 ), the inlet side pressure of the evaporator 11 is (P 2 ), and the supply pressure of the main pipe 12 is (P 3 ), in order to guarantee the supply pressure (P 3 ), it is necessary to The pressure (P 2 ) on the inlet side of the vessel 11 must be at least (P 3 + The minimum pressure required for P 2 ) is the gas phase pressure (P 1 ), which changes depending on the outside temperature and LPG composition.
In general, it is expressed as P 2 ≧{(P 3 +X)+α}=(1,7+α)Kg/cm 2 .
そこで気相ライン13に取付けられる本案の自
力式圧力制御弁の上限圧力遮断機構を上記供給圧
力(P3)と同じ0,7Kg/cm2とし、また液相ラ
イン14側の圧力調整器15を、それよりもやゝ
低い0,65Kg/cm2にそれぞれ設定しておくと、貯
槽10内のLPGは上記気相ライン13から優先
的に本管12側に供給されるものである。而して
この場合、上記貯槽内の気相圧力(P1)が上述
した(P2)の必要最小圧(1,7+α)Kg/cm2
よりも低下すると上述した下限圧力遮断機構が自
動的に閉止し、蒸発器11に供給されるLPGに
必要な圧力を確保し得るように予め上記下限圧設
定用のダイヤフラム弁4の圧力をネジ8により設
定しておく。即ち、LPGの消費に伴つて貯槽1
0の気相圧力(P1)が(P2)以下に低下すると、
気相ライン13からのLPGの流路が閉止して、
該ラインにおけるLPGの新たな供給を停止する
から、引続いて使用される本管12側への供給圧
力(P3)が次第に低下し、これが0,65Kg/cm2
に達した時点で上記液相ライン14の圧力調整器
15が開弁し、気相ライン13に変わつて蒸発器
11によつて気化されたLPGを本管12側に供
給するのである。 Therefore, the upper limit pressure cutoff mechanism of the proposed self-powered pressure control valve installed in the gas phase line 13 is set to 0.7 Kg/cm 2 , which is the same as the above supply pressure (P 3 ), and the pressure regulator 15 on the liquid phase line 14 side is set to 0.7 Kg/cm 2 . , and 0.65 Kg/cm 2 which are slightly lower than those, LPG in the storage tank 10 is preferentially supplied to the main pipe 12 side from the gas phase line 13. In this case, the gas phase pressure (P 1 ) in the storage tank is the required minimum pressure (1,7+α) Kg/cm 2 for (P 2 ).
When the pressure drops below the lower limit pressure, the above-mentioned lower limit pressure cutoff mechanism automatically closes, and the pressure of the diaphragm valve 4 for setting the lower limit pressure is set by the screw 8 in advance so that the pressure required for LPG supplied to the evaporator 11 can be secured. Set it accordingly. In other words, as LPG is consumed, storage tank 1
When the gas phase pressure (P 1 ) at 0 falls below (P 2 ),
The LPG flow path from the gas phase line 13 is closed,
Since the new supply of LPG in this line is stopped, the supply pressure (P 3 ) to the main pipe 12 side used subsequently decreases gradually, and this decreases to 0.65Kg/cm 2
At the point when the pressure is reached, the pressure regulator 15 of the liquid phase line 14 opens, and the LPG vaporized by the evaporator 11 is supplied to the main pipe 12 instead of to the gas phase line 13.
尚、液相ライン14からLPGが供給されてい
る間に貯槽10内のLPGの自然気化が促進され、
その圧力(P1)が(P2)を越えると上記下限圧
力遮断機構が先に述べたものと逆に作動して開弁
し、再び気相ライン13からのLPGが本管12
側へと供給され、該部における圧力(P3)が0,
70Kg/cm2となるから、その間、圧力調整器15の
働きにより液相ライン14からのLPGの供給が
停止されるのである。 Incidentally, while LPG is being supplied from the liquid phase line 14, natural vaporization of LPG in the storage tank 10 is promoted,
When the pressure (P 1 ) exceeds (P 2 ), the lower limit pressure cutoff mechanism operates in the opposite manner to the one described above and opens the valve, allowing LPG from the gas phase line 13 to flow once again to the main pipe 12.
is supplied to the side, and the pressure (P 3 ) at that part is 0,
70 Kg/cm 2 , so during that time, the pressure regulator 15 works to stop the supply of LPG from the liquid phase line 14.
一方、上記出口6側の上限圧力遮断機構は、そ
の弁体7aが常態では開放状態にあるが、消費先
のLPG使用量が減少したり、停止した場合等に
出口6付近の流体圧が充分高くなり、設定された
上限値を越えると、上限圧設定用のダイヤフラム
弁7が作動して弁体7aを弁座5bに着座させ、
出口側へのLPGの流出を遮断するのである。従
つて、本案の自力式圧力制御弁を気相ラインに設
けることによつて、予め上限と下限を設定した圧
力範囲内の気相側LPGを安定して供給できるの
である。 On the other hand, in the upper limit pressure cutoff mechanism on the outlet 6 side, the valve body 7a is normally in an open state, but when the consumption amount of LPG decreases or stops, the fluid pressure near the outlet 6 becomes sufficient. When the pressure increases and exceeds the set upper limit, the diaphragm valve 7 for setting the upper limit pressure operates to seat the valve body 7a on the valve seat 5b.
This blocks the flow of LPG to the exit side. Therefore, by providing the self-powered pressure control valve of the present invention in the gas phase line, it is possible to stably supply gas phase LPG within a pressure range with upper and lower limits set in advance.
〔考案の効果〕
以上述べた通り、本案の自力式圧力制御弁によ
れば、機筐に内蔵される上・下限二つの圧力遮断
機構が入口2および出口6付近のLPGの圧力を
受けて自力で作動するから、パイロツト弁等の補
助装置が省略できて、弁自体の構造を著しく簡単
且つ小型化し得るという特徴の他、これを使用し
た上記供給装置全体も十分に小型化でき、しかも
気相からのガス供給を液相に優先させることで、
蒸発器の稼働機会も減少するため、運転に要する
電力費が逓減できて経済性に優れるなど、特に気
相ライン主導型のLPG供給装置における制御弁
として顕著な効果が認められるのである。[Effects of the invention] As described above, according to the self-powered pressure control valve of the present invention, the two upper and lower pressure cut-off mechanisms built into the machine casing operate on their own when receiving the pressure of LPG near the inlet 2 and outlet 6. Since it operates in the gas phase, auxiliary devices such as pilot valves can be omitted, and the structure of the valve itself can be significantly simplified and downsized. In addition, the entire supply device using this can be sufficiently downsized, and the gas phase By prioritizing the gas supply from the liquid phase to the liquid phase,
Since the evaporator's operating opportunities are reduced, the electricity cost required for operation is reduced, making it highly economical, making it particularly effective as a control valve in gas-phase line-driven LPG supply systems.
第1図は本案圧力制御弁の中心部縦断面図、第
2図は気相ライン主導型のLPG供給装置の配置
図である。
尚、図中1……機筐、2……入口、3,5……
弁座筒、4,7……ダイヤフラム弁、6……出
口。
FIG. 1 is a vertical cross-sectional view of the central part of the pressure control valve of the present invention, and FIG. 2 is a layout diagram of a gas phase line-driven LPG supply device. In addition, in the figure 1... Machine casing, 2... Entrance, 3, 5...
Valve seat cylinder, 4, 7...Diaphragm valve, 6...Outlet.
Claims (1)
体圧によつて下限圧設定用のダイヤフラム弁4を
作動して弁座3bを開閉自在とした下限圧力遮断
機構と、該機筐1の下流側に上記下限圧力遮断機
構の弁座筒の弁座3bと対面して設けられた弁座
筒5の弁体7aが、本管12側に通ずる出口6付
近の流体圧力によつて作動する上限圧設定用のダ
イヤフラム弁7を介して上記弁体を開閉自在とし
た上限圧力遮断機構を組み込んだことを特徴とす
る液化石油ガス供給装置等の気相ラインにおける
自力式圧力制御弁。 A lower limit pressure cut-off mechanism is provided on the upstream side of the machine casing 1, which operates a diaphragm valve 4 for setting a lower limit pressure by fluid pressure flowing in from the inlet 2 of the machine casing 1, so that the valve seat 3b can be opened and closed. The valve body 7a of the valve seat cylinder 5, which is provided on the downstream side facing the valve seat 3b of the valve seat cylinder of the lower limit pressure cutoff mechanism, is operated by the fluid pressure near the outlet 6 leading to the main pipe 12 side. A self-powered pressure control valve for a gas phase line of a liquefied petroleum gas supply device, etc., which incorporates an upper limit pressure cutoff mechanism in which the valve body can be opened and closed via a diaphragm valve 7 for setting the upper limit pressure.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13194684U JPS6077899U (en) | 1984-08-30 | 1984-08-30 | Self-powered pressure control valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13194684U JPS6077899U (en) | 1984-08-30 | 1984-08-30 | Self-powered pressure control valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6077899U JPS6077899U (en) | 1985-05-30 |
JPH0353091Y2 true JPH0353091Y2 (en) | 1991-11-19 |
Family
ID=30298137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13194684U Granted JPS6077899U (en) | 1984-08-30 | 1984-08-30 | Self-powered pressure control valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6077899U (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0679709B2 (en) * | 1987-10-27 | 1994-10-12 | 三菱電線工業株式会社 | Liquid leakage detection device for cyan waste liquid treatment device |
JPH0633858B2 (en) * | 1988-03-17 | 1994-05-02 | テイサン株式会社 | Method and device for preventing gas outflow phenomenon of pressure regulator |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS48101620A (en) * | 1972-04-05 | 1973-12-21 |
-
1984
- 1984-08-30 JP JP13194684U patent/JPS6077899U/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS48101620A (en) * | 1972-04-05 | 1973-12-21 |
Also Published As
Publication number | Publication date |
---|---|
JPS6077899U (en) | 1985-05-30 |
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