JPH0121263Y2 - - Google Patents
Info
- Publication number
- JPH0121263Y2 JPH0121263Y2 JP1979144845U JP14484579U JPH0121263Y2 JP H0121263 Y2 JPH0121263 Y2 JP H0121263Y2 JP 1979144845 U JP1979144845 U JP 1979144845U JP 14484579 U JP14484579 U JP 14484579U JP H0121263 Y2 JPH0121263 Y2 JP H0121263Y2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- valve
- chamber
- liquid supply
- 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
- 239000007788 liquid Substances 0.000 claims description 153
- 238000001514 detection method Methods 0.000 claims description 34
- 230000007246 mechanism Effects 0.000 claims description 30
- 238000005192 partition Methods 0.000 claims description 12
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 description 15
- 238000010586 diagram Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Fluid-Driven Valves (AREA)
- Float Valves (AREA)
Description
【考案の詳細な説明】
本考案は給液停止装置に係り、パイロツト弁の
開閉により主弁を開閉駆動する構成とすることに
より、微圧の圧力信号によつて簡単に主弁を閉弁
させることができ、しかも給液される液体の圧力
を利用して必要なとき確実に給液を停止すること
ができる給液停止装置を提供することを目的とす
る。[Detailed description of the invention] The present invention relates to a liquid supply stop device, and has a structure in which the main valve is driven to open and close by opening and closing the pilot valve, so that the main valve can be easily closed by a slight pressure signal. It is an object of the present invention to provide a liquid supply stop device capable of reliably stopping the liquid supply when necessary by using the pressure of the supplied liquid.
例えばタンクローリ車等に所定量の油液を出荷
する給液出荷装置は、通常出荷のつどタンクロー
リ車のハツチ内にドロツプパイプを挿入して給液
する構成とされている。この種の給液出荷装置に
おいては、ハツチからの油液のオーバフローを防
止するため、ハツチ内の液面が危険液位に達しそ
うなことを液面検知機構によつて検知し、この液
面検知機構からの信号があつた場合に給液停止装
置によつて開閉弁を自動的に閉弁駆動し給液を停
止させる構成とされている。 For example, a liquid supply and shipping device for shipping a predetermined amount of oil to a tank lorry or the like is usually configured to insert a drop pipe into the hatch of the tank lorry to supply the liquid each time the oil is shipped. In this type of liquid supply and shipping device, in order to prevent oil from overflowing from the hatch, a liquid level detection mechanism detects when the liquid level in the hatch is about to reach a dangerous liquid level. When a signal is received from the detection mechanism, the liquid supply stop device automatically closes the on-off valve to stop the liquid supply.
しかるに、上記従来の給液停止装置は、他力式
のため開閉弁を開閉駆動するための駆動力源とし
て電源や油空圧源等を特別に必要としており、そ
のため構成が複雑でしかも運転コストも高くつく
等の欠点を有していた。 However, since the conventional liquid supply stop device described above is externally powered, it requires a special power source, hydraulic/pneumatic pressure source, etc. as a driving power source to open and close the on-off valve, and as a result, the configuration is complex and the operating cost is high. However, it also had drawbacks such as being expensive.
又、上記従来の給液停止装置の液面検知機構
は、例えば液面の変化に伴なうベロフラム内の圧
力変化を検出したり、或いは常時ノズル口から空
気を噴出させておき、ノズル口が液面によつて閉
塞されたときのノズル背圧の変化を検出したりす
る構成であるため、液面検知に伴なう圧力信号の
レベルが低く、従つてこの圧力信号によつて開閉
弁を閉弁駆動させるにはどうしても信号増幅部が
必要であり、又これらの液面検知機構は周囲の環
境の影響を受けやすく、このため誤動作しやすい
等の欠点を有していた。 In addition, the liquid level detection mechanism of the conventional liquid supply stop device described above detects, for example, a change in the pressure inside the bellofram due to a change in the liquid level, or constantly blows air from the nozzle port. Since the configuration detects changes in nozzle back pressure when the nozzle is blocked by the liquid level, the level of the pressure signal associated with liquid level detection is low, so this pressure signal is used to control the opening/closing valve. In order to drive the valve to close, a signal amplifying section is absolutely necessary, and these liquid level detection mechanisms are susceptible to the influence of the surrounding environment, and therefore have the disadvantage of being prone to malfunction.
本考案は、給液管途中に設けられ内部に液流路
を有する弁本体と、該弁本体に液流路とは独立し
た第1の室を画成すべく設けられた第1の可動隔
壁と、該第1の可動隔壁に弁体が固定され前記第
1の室と液流路との液圧力差に応じて該弁体が変
位することにより液流路を開閉する主弁と、前記
第1の室を該主弁の上流側の液流路に連通する液
供給路と、該液供給路に設けた第1の絞りと、前
記第1の室を該主弁の下流側液流路に連通する液
排出路と、該液排出路中に設けられその開閉に応
じて前記主弁を開閉するパイロツト弁と、前記パ
イロツト弁を開弁したとき、これを開弁状態にロ
ツクするロツク機構と、を備え、前記弁体に前記
液流路及び第1の室とは画成して設けられ内部を
該ロツク機構に連結された第2の可動隔壁により
第1の導圧室と第2の導圧室とに画成された第2
の室と、常時は閉塞され前記給液管による給液量
が所定量になつたとき開口される孔を有した液面
検知パイプと、該液面検知パイプに沿つて上、下
方向のみに摺動自在に設けられ液位の上昇ととも
に前記液面検知パイプの孔と連通する連通孔を有
するフロートと、液面検知パイプと前記主弁の上
流側の液流路とを連通する第2の液供給路と、該
第2の液供給路に設けられ前記主弁の開閉に応動
して開閉する開閉弁と、該開閉弁と前記液面検知
パイプとの間の前記第2の液供給路に設けられた
第2の絞りと、該第2の絞りと前記開閉弁との間
の前記第2の液供給路と前記第1の導圧室とを連
通する第1の導圧路と、該第2の絞りと前記液面
検知パイプとの間の前記第2の液供給路と前記第
2の導圧室とを連通する第2の導圧路と、からな
り、前記第1の導圧室と第2の導圧室との液圧力
差に応じた前記第2の可動隔壁の変位に基づき前
記ロツク機構を解除して前記パイロツト弁を閉弁
せしめるロツク解除機構部を設けてなるものであ
り、以下図面とともにその一実施例につき説明す
る。第1図は本考案になる給液停止装置を適用し
た給液出荷装置の一例の概略構成図、第2図は上
記給液停止装置の一実施例の概略構成図、第3,
4図は夫々第2図の要部の縦断正面図及び一部切
截縦断側面図を示す。 The present invention includes a valve body provided in the middle of a liquid supply pipe and having a liquid flow path therein, and a first movable partition wall provided in the valve body to define a first chamber independent of the liquid flow path. , a main valve having a valve body fixed to the first movable partition wall and opening/closing the liquid flow path by displacing the valve body according to a hydraulic pressure difference between the first chamber and the liquid flow path; a liquid supply path that communicates a first chamber with a liquid flow path upstream of the main valve; a first throttle provided in the liquid supply path; and a liquid flow path that connects the first chamber with a liquid flow path downstream of the main valve. a liquid discharge passage that communicates with the liquid discharge passage; a pilot valve that is provided in the liquid discharge passage and opens and closes the main valve in accordance with the opening and closing of the liquid discharge passage; and a lock mechanism that locks the pilot valve in an open state when the pilot valve is opened. and a second movable partition provided in the valve body so as to define the liquid flow path and the first chamber, the interior of which is connected to the locking mechanism, the first pressure impulse chamber and the second pressure chamber are separated. a second pressure chamber defined in the
a liquid level detection pipe having a hole which is normally closed and is opened when the amount of liquid supplied by the liquid supply pipe reaches a predetermined amount; a float that is slidably provided and has a communication hole that communicates with the hole of the liquid level detection pipe as the liquid level rises; and a second float that communicates the liquid level detection pipe with the liquid flow path upstream of the main valve. a liquid supply path, an on-off valve that is provided in the second liquid supply path and opens and closes in response to opening and closing of the main valve, and a second liquid supply path between the on-off valve and the liquid level detection pipe. a second throttle provided in the second throttle, and a first pressure path that communicates the second liquid supply path between the second throttle and the on-off valve and the first pressure chamber; a second pressure channel communicating between the second liquid supply channel and the second pressure chamber between the second throttle and the liquid level detection pipe; A lock release mechanism is provided that releases the lock mechanism and closes the pilot valve based on the displacement of the second movable partition according to the hydraulic pressure difference between the pressure chamber and the second pressure chamber. An embodiment thereof will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of an example of a liquid supply shipping device to which the liquid supply stop device of the present invention is applied, FIG. 2 is a schematic configuration diagram of an example of the above-mentioned liquid supply stop device,
4 shows a longitudinal sectional front view and a partially cutaway longitudinal sectional side view of the main part of FIG. 2, respectively.
第1図中、給液停止装置1は、本実施例の場
合、タンクローリ車2のハツチ3内に油液を給液
する給液出荷装置4に適用してあり、ハツチ3内
に所定量の給液がなされたとき作動して給液を自
動停止する。出荷ステージには油液タンク5に連
通するローデイングアーム6が設けられており、
給液に際してはタンクローリ車2のハツチ3を開
け、ハツチ3内にローデイングアーム6先端部の
ドロツプパイプ7を挿入する。このとき、ドロツ
プパイプ7とともに液面検知パイプ8もハツチ3
内所定位置にセツトする。 In FIG. 1, the liquid supply stop device 1 is applied to a liquid supply shipping device 4 that supplies oil into a hatch 3 of a tank truck 2 in this embodiment, and a predetermined amount of oil is supplied into the hatch 3. It operates when liquid is supplied and automatically stops the liquid supply. The shipping stage is provided with a loading arm 6 that communicates with the oil tank 5.
When supplying liquid, the hatch 3 of the tank truck 2 is opened and the drop pipe 7 at the tip of the loading arm 6 is inserted into the hatch 3. At this time, the liquid level detection pipe 8 as well as the drop pipe 7 are also connected to the hatch 3.
Set it in the specified position inside.
この液面検知パイプ8には、第2図に示す如く
フロート9が昇降自在に嵌装してあり、ハツチ3
内に給液された油液の量が所定量に達したとき、
フロート9に穿設した孔連通孔9aと液面検知パ
イプ8に穿設した孔8aが互いに連通合致する構
成とされている。尚、液面検知パイプ8とフロー
ト9の摺接部分にはシール機構を設けていないか
ら、フロート9は液面に応じて極めてスムーズに
動くことができる。 A float 9 is fitted into the liquid level detection pipe 8 so as to be able to rise and fall freely as shown in FIG.
When the amount of oil supplied inside reaches a predetermined amount,
A hole communicating hole 9a formed in the float 9 and a hole 8a formed in the liquid level detection pipe 8 are configured to communicate with each other. Note that since no sealing mechanism is provided at the sliding contact portion between the liquid level detection pipe 8 and the float 9, the float 9 can move extremely smoothly depending on the liquid level.
ローデイングアーム6とドロツプパイプ7の接
続部分には、第3,4図に示す如く給液停止装置
1の弁本体10が設けてある。弁本体10は、ロ
ーデイングアーム6に接続される流入口10a
と、ドロツプパイプ7に接続される流出口10b
を有しており、その内部には室第1の室11を画
成する可動隔壁としてのダイヤフラム膜第1の可
動隔壁12が張設してある。このダイヤフラム膜
12の中央部には、主弁13の弁体14が固着し
てある。この弁体14は断面が大略I字状をな
し、ダイヤフラム膜12の変位とともに弁座15
に対して離着座する。12aはダイヤフラム膜1
2と弁本体10との間に圧縮嵌装したばねで、弁
体14を閉弁方向に附勢している。本実施例の場
合、弁体14内に液排出路16が貫通形成してあ
り、この液排出路16の一端側開口部に後述する
パイロツト弁17の弁体18が離着座する弁座1
9が設けてある。この液排出路16は、ダイヤフ
ラム室11とその下流側にあたるドロツプパイプ
7とを連通するもので、ダイヤフラム押え20に
はダイヤフラム室11と液排出路16を連通させ
る孔20aが穿設してある。 A valve body 10 of the liquid supply stop device 1 is provided at the connecting portion between the loading arm 6 and the drop pipe 7, as shown in FIGS. 3 and 4. The valve body 10 has an inlet 10a connected to the loading arm 6.
and an outlet 10b connected to the drop pipe 7.
A diaphragm membrane first movable partition wall 12 as a movable partition wall defining a first chamber 11 is stretched inside the chamber. A valve body 14 of the main valve 13 is fixed to the center of the diaphragm membrane 12 . This valve body 14 has a roughly I-shaped cross section, and as the diaphragm membrane 12 is displaced, the valve seat 15
Take off and sit down against. 12a is the diaphragm membrane 1
A spring compressively fitted between the valve body 10 and the valve body 10 urges the valve body 14 in the valve closing direction. In the case of this embodiment, a liquid discharge passage 16 is formed to penetrate inside the valve body 14, and a valve body 18 of a pilot valve 17, which will be described later, is seated in an opening on one end side of the liquid discharge passage 16.
9 is provided. The liquid discharge passage 16 communicates the diaphragm chamber 11 with the drop pipe 7 on the downstream side thereof, and a hole 20a is bored in the diaphragm retainer 20 to communicate the diaphragm chamber 11 with the liquid discharge passage 16.
ダイヤフラム室11は、弁本体10の側壁部に
穿設した液供給路21を介して反対側の室22液
流路を構成すると、さらに室22の上流側にあた
るローデイングアーム6に連通されている。23
は液供給路21中に設けた絞り弁(第1の絞り)
で、液供給路21を介してダイヤフラム室11に
供給される液の流量を絞る。 The diaphragm chamber 11 forms a liquid flow path in a chamber 22 on the opposite side via a liquid supply path 21 formed in the side wall of the valve body 10, and is further communicated with the loading arm 6 on the upstream side of the chamber 22. . 23
is a throttle valve (first throttle) provided in the liquid supply path 21
Then, the flow rate of the liquid supplied to the diaphragm chamber 11 via the liquid supply path 21 is reduced.
パイロツト弁17の弁体18は、弁体14の液
排出路16を挿通するロツド24に鍔状に一体形
成してあり、ばね受け25と弁本体10内壁との
間に嵌装したばね26により弁体18は常時閉弁
方向に附勢されている。ロツド24の下端部に
は、ハンドル軸27に連結されたリンク部材28
が対向しており、ハンドル29の回動操作によつ
てリンク部材28を回動変位させることによつ
て、ロツド24は上方に押上げられる。 The valve body 18 of the pilot valve 17 is integrally formed in the shape of a brim with a rod 24 that is inserted through the liquid discharge path 16 of the valve body 14, and is supported by a spring 26 fitted between a spring receiver 25 and the inner wall of the valve body 10. The valve body 18 is always energized in the valve closing direction. A link member 28 connected to the handle shaft 27 is attached to the lower end of the rod 24.
are opposed to each other, and by rotating the link member 28 by rotating the handle 29, the rod 24 is pushed upward.
ロツド24の上部は、弁本体10内壁に突設し
た突部30に摺動自在に嵌合している。31は、
ロツド24の上端部近傍に穿設した孔内に半径方
向に転動可能に設けた係止球で、ロツド24の上
端部を軸方向に挿通するニードル32とともにロ
ツク機構部33を構成する。 The upper part of the rod 24 is slidably fitted into a protrusion 30 protruding from the inner wall of the valve body 10. 31 is
A locking ball is provided so as to be able to roll in the radial direction in a hole drilled near the upper end of the rod 24, and together with a needle 32 which is inserted through the upper end of the rod 24 in the axial direction, a locking mechanism 33 is constituted.
ニードル32がロツド24内に深く進入してい
ない状態においては、図示の如く非ロツク状態に
あるが、ロツド24が上動変位され相対的にニー
ドル32がロツド24内に深く進入すると、係止
球31がニードル32大径部テーパ面に押されて
ロツド24外にはみ出し、突部30の貫通孔大径
部に固着したリング部材34にのり上げるので、
ロツド24は下動不能にロツクされる。 When the needle 32 has not penetrated deeply into the rod 24, it is in an unlocked state as shown in the figure, but when the rod 24 is displaced upward and the needle 32 relatively penetrates deeply into the rod 24, the locking ball locks. 31 is pushed by the tapered surface of the large diameter portion of the needle 32 and protrudes outside the rod 24, and climbs onto the ring member 34 fixed to the large diameter portion of the through hole of the protrusion 30.
The rod 24 is locked so that it cannot be lowered.
ニードル32は、弁本体10上部に取付けたロ
ツク解除機構部35内でダイヤフラム膜36に結
合されている。ロツク解除機構部35内は、ダイ
ヤフラム膜(第2の可動隔壁)36によつて一対
の室37,38に画成されており、室(第1、第
2の導圧差)37,38間の圧力差がダイヤフラ
ム室38内に嵌装したばね39の附勢力よりも大
きくなつたときに、ダイヤフラム膜36が上動変
位し、ロツク解除機構部35が作動してロツク機
構部33によるロツド24のロツクを解除する。 The needle 32 is connected to a diaphragm membrane 36 within a lock release mechanism 35 mounted on the top of the valve body 10. The inside of the lock release mechanism section 35 is defined by a diaphragm membrane (second movable partition) 36 into a pair of chambers 37 and 38, and between the chambers (first and second guiding pressure difference) 37 and 38. When the pressure difference becomes larger than the urging force of the spring 39 fitted in the diaphragm chamber 38, the diaphragm membrane 36 is displaced upward, the lock release mechanism 35 is activated, and the lock mechanism 33 releases the rod 24. Release the lock.
ここで、弁本体10は管(第2の液供給路)4
0を介して液面検知パイプ8に連通接続されてお
り、液供給路21から分岐させた分岐管41が管
40に連通している。分岐管41の途中には、ダ
イヤフラム押え20の変位によつて開閉される開
閉弁42が設けてあり、ダイヤフラム膜12が上
動変位して主弁13が開弁したときに開閉弁42
は開弁される。 Here, the valve body 10 is a pipe (second liquid supply path) 4
0, and a branch pipe 41 branched from the liquid supply path 21 communicates with the pipe 40. An on-off valve 42 that is opened and closed by the displacement of the diaphragm retainer 20 is provided in the middle of the branch pipe 41. When the diaphragm membrane 12 is displaced upward and the main valve 13 is opened, the on-off valve 42
is opened.
43は管40の途中に設けた絞り(第2の絞
り)で、この絞り43の前後から分岐させた導圧
管(第1、第2の導圧路)44,45が、夫々前
記ロツク解除機構部35のダイヤフラム室37,
38に連通接続されている。 43 is a throttle (second throttle) provided in the middle of the pipe 40, and impulse pipes (first and second pressure passages) 44 and 45 branched from before and after this throttle 43 are connected to the lock release mechanism, respectively. diaphragm chamber 37 of section 35;
38.
給液開始に際し、ハンドル29を第4図中反時
計方向に回動操作すると、ロツド24が上方に押
上げられ、パイロツト弁17が開弁する。又、ロ
ツド24内に設けた係止球31がニードル32の
大径部に押され、一部がロツド24外にはみ出し
てリング部材34に乗り上げ、これによりロツド
24は上動位置にロツクされる。 When starting the liquid supply, when the handle 29 is rotated counterclockwise in FIG. 4, the rod 24 is pushed upward and the pilot valve 17 is opened. Also, the locking ball 31 provided inside the rod 24 is pushed by the large diameter portion of the needle 32, and a portion protrudes outside the rod 24 and rides on the ring member 34, thereby locking the rod 24 in the upward movement position. .
パイロツト弁17が開弁すると、ダイヤフラム
室11内に閉じ込められていた油液が、ダイヤフ
ラム押え20の貫通孔20a、パイロツト弁1
7、ロツド24内の液排出路16を通つて主弁1
3の下流側に流出する。その結果、ダイヤフラム
室11内の油液の圧力が低下し、ダイヤフラム膜
12は室22内の液圧によりばね12aに抗して
上動変位する。これにより、弁体14は弁座19
から離間し、主弁13は開弁する。従つて、主弁
13の開弁とともにローデイングアーム6内の油
液がドロツプパイプ7内に供給され、これにより
給液が開始される。 When the pilot valve 17 opens, the oil trapped in the diaphragm chamber 11 flows through the through hole 20a of the diaphragm holder 20 and into the pilot valve 1.
7. Main valve 1 through liquid discharge passage 16 in rod 24
It flows out to the downstream side of 3. As a result, the pressure of the oil within the diaphragm chamber 11 decreases, and the diaphragm membrane 12 is displaced upward against the spring 12a due to the hydraulic pressure within the chamber 22. As a result, the valve body 14 is moved to the valve seat 19.
The main valve 13 is opened. Therefore, when the main valve 13 is opened, the oil in the loading arm 6 is supplied into the drop pipe 7, thereby starting fluid supply.
又、主弁13が開弁したときダイヤフラム押え
20がそれまで閉弁していた開閉弁42の弁軸4
2aを上方に押上げ、これにより開閉弁42が開
弁する。開閉弁42の開弁によつて液供給路21
内の油液が、管40を通つて液面検知パイプ8内
に供給される。 Also, when the main valve 13 opens, the diaphragm retainer 20 closes the valve shaft 4 of the on-off valve 42, which had been closed until then.
2a is pushed upward, thereby opening the on-off valve 42. The liquid supply path 21 is opened by opening the on-off valve 42.
The oil inside is supplied into the liquid level detection pipe 8 through the pipe 40.
しかして、給液開始当初は、ハツチ3内の油液
の液位は低く、このためフロート9が液面検知パ
イプ8aの孔を閉塞している。従つて、液面検知
パイプ8aと管40内はすぐに油液で満たされた
状態となり、管40内の油液が流れなくなるので
絞り43の前後には圧力差は生じない。従つて、
この時点ではまだロツク解除機構部35は作動し
ない。 However, at the beginning of the liquid supply, the liquid level of the oil in the hatch 3 is low, and therefore the float 9 closes the hole of the liquid level detection pipe 8a. Therefore, the liquid level detection pipe 8a and the pipe 40 are immediately filled with oil, and since the oil in the pipe 40 stops flowing, no pressure difference is generated before and after the throttle 43. Therefore,
At this point, the lock release mechanism 35 is not yet activated.
給液の進行とともにハツチ3内の油液の液面が
上昇してくると、フロート9は液面に追従して上
動し、所定の液位に達したときにフロート9の孔
9aと液面検知パイプ8の孔8aが合致する。そ
の結果、それまで液面検知パイプ8内に閉じ込め
られていた油液は、孔8a,9aを介してハツチ
3内に流出する。液面検知パイプ8からの油液の
流出に伴ない、管40内の油液も流れ、絞り43
の前後に差圧が生ずる。その結果、ロツク解除機
構部35のばね39が装着された側のダイヤフラ
ム室38内の圧力が低下する。フロート9は液面
検知パイプ8にガイドされながら上昇するため、
液面の上昇に正確に追従することができ、しかも
ドロツプパイプ7が液中にあるので液面に波動が
生じにくいので、波動の影響をほとんど受けな
い。依つて、液面検知パイプ8は正確に液位を検
出できる。 As the liquid level of the oil in the hatch 3 rises as the liquid supply progresses, the float 9 moves upward to follow the liquid level, and when a predetermined liquid level is reached, the hole 9a of the float 9 and the liquid The hole 8a of the surface detection pipe 8 matches. As a result, the oil that had been confined within the liquid level detection pipe 8 flows out into the hatch 3 through the holes 8a and 9a. As the oil flows out from the liquid level detection pipe 8, the oil inside the pipe 40 also flows, and the aperture 43
A differential pressure occurs before and after. As a result, the pressure within the diaphragm chamber 38 on the side of the lock release mechanism 35 to which the spring 39 is attached decreases. Since the float 9 rises while being guided by the liquid level detection pipe 8,
It is possible to accurately follow the rise in the liquid level, and since the drop pipe 7 is in the liquid, the liquid level is hardly affected by waves, so it is hardly affected by waves. Therefore, the liquid level detection pipe 8 can accurately detect the liquid level.
このため、ダイヤフラム膜36はばね39に抗
して上方に変位し、ダイヤフラム膜36とともに
ニードル32が上動変位する。その結果、それま
でニードル32によつてロツド24外に押し出さ
れていた係止球31が、ニードル32による係止
を解除されてロツド24内に引込み、ロツド24
は係止球31によるロツクを解除される。これに
より、ロツド24は、ばね26の弾発力によつて
下動変位し、パイロツト弁17の弁体18が弁座
19に着座し、液排出路16の開口部を閉塞す
る。 Therefore, the diaphragm membrane 36 is displaced upward against the spring 39, and the needle 32 is displaced upward together with the diaphragm membrane 36. As a result, the locking ball 31, which had been pushed out of the rod 24 by the needle 32, is released from the lock by the needle 32 and retracts into the rod 24.
is released from the lock by the locking ball 31. As a result, the rod 24 is displaced downward by the elastic force of the spring 26, and the valve body 18 of the pilot valve 17 seats on the valve seat 19, closing the opening of the liquid discharge path 16.
パイロツト弁17が閉弁すると、ダイヤフラム
室11は下流側と遮断されるので、ダイヤフラム
室11内の圧力は大となり、ダイヤフラム膜12
が下動変位し、それとともに主弁13の弁体14
は閉弁駆動されて弁座15に当接着座し、給液は
停止される。 When the pilot valve 17 closes, the diaphragm chamber 11 is cut off from the downstream side, so the pressure inside the diaphragm chamber 11 increases and the diaphragm membrane 12
is displaced downward, and at the same time, the valve body 14 of the main valve 13
The valve is driven to close and is brought into contact with the valve seat 15, and the liquid supply is stopped.
尚、ロツド24が下動変位したときハンドル2
9は第4図中時計方向に回動復帰せしめられ、又
ダイヤフラム膜12の下動変位とともに開閉弁4
2が閉弁し、液面検知パイプ8に対する油液の供
給も断たれる。 Furthermore, when the rod 24 moves downward, the handle 2
9 is rotated back in the clockwise direction in FIG.
2 is closed, and the supply of oil to the liquid level detection pipe 8 is also cut off.
このように、上記構成になる給液停止装置1
は、フロート9が所定位置まで変位したときに液
面検知パイプ8から油液が流出し、管40中に設
けた絞り43の前後で生ずる差圧によつてロツク
解除機構部35を作動させる構成であるから、微
圧の液面検知信号によつても確実に動作する。 In this way, the liquid supply stop device 1 having the above configuration
In this configuration, when the float 9 is displaced to a predetermined position, oil flows out from the liquid level detection pipe 8, and the lock release mechanism 35 is actuated by the differential pressure generated before and after the throttle 43 provided in the pipe 40. Therefore, it operates reliably even with a low pressure liquid level detection signal.
又、ロツク解除機構部35のダイヤフラム膜3
6の変位によつてニードル32を変位させ、この
ニードル32の変位によつてロツク機構部33に
よるロツクを解除する構成としているが、ニード
ル32の変位には大なる力は必要でなく、しかも
ロツク解除されたロツド24は大なる力で変位す
るから、パイロツト弁17は高速で閉弁駆動され
る。 In addition, the diaphragm membrane 3 of the lock release mechanism section 35
6 displaces the needle 32, and this displacement of the needle 32 releases the lock by the locking mechanism 33. However, a large force is not required to displace the needle 32, and moreover, the lock is released. Since the released rod 24 is displaced with a large force, the pilot valve 17 is driven to close at high speed.
又、パイロツト弁17を閉弁させてダイヤフラ
ム膜12に作用する液圧を変えることにより主弁
13を閉弁させる構成であるから、主弁13を閉
弁駆動するのに特別な駆動力は一切必要とせず、
極めて簡単かつ確実に主弁13を閉弁駆動するこ
とができる。 Furthermore, since the main valve 13 is closed by closing the pilot valve 17 and changing the hydraulic pressure acting on the diaphragm membrane 12, no special driving force is required to close the main valve 13. without needing,
The main valve 13 can be driven to close extremely easily and reliably.
尚、上記実施例において、給液される液として
は油液に限らず他の液でもよく、又給液対象とし
てはタンクローリ車2に限らず他のものでもよ
い。 In the above embodiment, the liquid to be supplied is not limited to oil liquid, but may be any other liquid, and the liquid to be supplied is not limited to the tank lorry vehicle 2, but may be other liquids.
又、給液停止装置1は、液面検知パイプ8によ
る液面検知信号によつて作動させる構成とした
が、他の例えば定量給液制御装置(図示せず)か
らの定量信号等によつて作動させる構成とするこ
ともできる。 Although the liquid supply stop device 1 is configured to be activated by a liquid level detection signal from the liquid level detection pipe 8, it can also be operated by other means such as a quantitative signal from a quantitative liquid supply control device (not shown). It can also be configured to operate.
上述の如く、本考案になる給液停止装置は、給
液量が所定量に達するとフロートの上昇により液
面検知パイプ内の液が流出し、これにより第2の
可動隔壁の液圧力差によりパイロツト弁のロツク
を解除してパイロツト弁の閉弁とともに主弁を閉
弁させるため、機械的な動作により給液を停止さ
せるのではなく、機械的な摩耗等により耐久性が
劣ることがないばかりか、特別な動力源を用いな
くとも主弁を簡単かつ確実に閉弁駆動することが
でき、又パイロツト弁の駆動はロツク機構部によ
るロツクを解除するだけでよく、しかもロツク解
除機構部は微圧の信号によつて駆動することがで
きるから、ロツク解除機構部、ロツク機構部、パ
イロツト弁、主弁等を給液せんとする液体の圧力
を利用して良好に作動させることができる。さら
に、フロートが液面検知パイプにガイドされて
上、下方向のみに移動できるので、液位を正確に
検知してパイロツト弁のロツク解除を的確に行な
え、予め設定された液位で給液を停止することが
できる等の特長を有する。 As mentioned above, in the liquid supply stop device according to the present invention, when the liquid supply amount reaches a predetermined amount, the liquid in the liquid level detection pipe flows out due to the rise of the float, and this causes the liquid pressure difference between the second movable partition wall to flow out. Since the pilot valve is unlocked and the main valve is closed at the same time as the pilot valve is closed, the fluid supply is not stopped by mechanical operation, and durability is not degraded due to mechanical wear etc. In addition, the main valve can be driven to close easily and reliably without using a special power source, and driving the pilot valve only requires releasing the lock by the locking mechanism, and the unlocking mechanism is microscopic. Since it can be driven by a pressure signal, the lock release mechanism, lock mechanism, pilot valve, main valve, etc. can be operated effectively using the pressure of the liquid to be supplied. Furthermore, since the float is guided by the liquid level detection pipe and can move only upwards and downwards, it is possible to accurately detect the liquid level and unlock the pilot valve, allowing liquid to be supplied at a preset liquid level. It has features such as being able to stop.
第1図は本考案になる給液停止装置を適用した
給液出荷装置の一例の概略構成図、第2図は上記
給液停止装置の一実施例の概略構成図、第3,4
図は夫々第2図の要部の縦断正面図及び一部切截
縦断側面図である。
1……給液停止装置、10……弁本体、11…
…ダイヤフラム室、12……ダイヤフラム膜、1
3……主弁、14……弁体、16……液排出路、
17……パイロツト弁、21……液供給路、23
……絞り弁、33……ロツク機構部、35……ロ
ツク解除機構部。
Fig. 1 is a schematic configuration diagram of an example of a liquid supply shipping device to which the liquid supply stop device according to the present invention is applied; Fig. 2 is a schematic configuration diagram of an example of the above liquid supply stop device;
The figures are a longitudinal sectional front view and a partially cutaway longitudinal sectional side view of the main part of FIG. 2, respectively. 1...Liquid supply stop device, 10...Valve body, 11...
...Diaphragm chamber, 12...Diaphragm membrane, 1
3...Main valve, 14...Valve body, 16...Liquid discharge path,
17...Pilot valve, 21...Liquid supply path, 23
...throttle valve, 33...lock mechanism section, 35...lock release mechanism section.
Claims (1)
本体と、 該弁本体に液流路とは独立した第1の室を画成
すべく設けられた第1の可動隔壁と、 該第1の可動隔壁に弁体が固定され前記第1の
室と液流路との液圧力差に応じて該弁体が変位す
ることにより液流路を開閉する主弁と、 前記第1の室を該主弁の上流側の液流路に連通
する液供給路と、 該液供給路に設けた第1の絞りと、 前記第1の室を該主弁の下流側液流路に連通す
る液排出路と、 該液排出路中に設けられその開閉に応じて前記
主弁を開閉するパイロツト弁と、 前記パイロツト弁を開弁したとき、これを開弁
状態にロツクするロツク機構と、を備え、 前記弁体に前記液流路及び第1の室とは画成し
て設けられ内部を該ロツク機構に連結された第2
の可動隔壁により第1の導圧室と第2の導圧室と
に画成された第2の室と、 常時は閉塞され前記給液管による給液量が所定
量になつたとき開口される孔を有した液面検知パ
イプと、 該液面検知パイプに沿つて上、下方向のみに摺
動自在に設けられ液位の上昇とともに前記液面検
知パイプの孔と連通する連通孔を有するフロート
と、 液面検知パイプと前記主弁の上流側の液流路と
を連通する第2の液供給路と、 該第2の液供給路に設けられ前記主弁の開閉に
応動して開閉する開閉弁と、 該開閉弁と前記液面検知パイプとの間の前記第
2の液供給路に設けられた第2の絞りと、 該第2の絞りと前記開閉弁との間の前記第2の
液供給路と前記第1の導圧室とを連通する第1の
導圧路と、 該第2の絞りと前記液面検知パイプとの間の前
記第2の液供給路と前記第2の導圧室とを連通す
る第2の導圧路と、からなり、 前記第1の導圧室と第2の導圧室との液圧力差
に応じた前記第2の可動隔壁の変位に基づき前記
ロツク機構を解除して前記パイロツト弁を閉弁せ
しめるロツク解除機構部を設けてなる給液停止装
置。[Scope of Claim for Utility Model Registration] A valve body provided in the middle of a liquid supply pipe and having a liquid flow path therein, and a first valve body provided in the valve body to define a first chamber independent of the liquid flow path. a movable partition wall, and a main valve having a valve body fixed to the first movable partition wall and opening and closing the liquid flow path by displacing the valve body in accordance with a hydraulic pressure difference between the first chamber and the liquid flow path. a liquid supply path that communicates the first chamber with a liquid flow path upstream of the main valve; a first throttle provided in the liquid supply path; and a liquid supply path that communicates the first chamber with a liquid flow path upstream of the main valve. a liquid discharge passage communicating with the side liquid flow passage; a pilot valve provided in the liquid discharge passage and opening and closing the main valve in response to opening and closing of the pilot valve; and when the pilot valve is opened, the pilot valve is in an open state. a locking mechanism that locks the valve, the liquid flow path and the first chamber are provided in the valve body so as to define the second chamber, and the inside of the valve body is connected to the locking mechanism.
a second chamber defined by a movable partition wall into a first pressure chamber and a second pressure chamber; a liquid level detection pipe having a hole, and a communication hole that is slidably provided only upward and downward along the liquid level detection pipe and communicates with the hole of the liquid level detection pipe as the liquid level rises. a float; a second liquid supply path that communicates the liquid level detection pipe with a liquid flow path upstream of the main valve; and a second liquid supply path that is provided in the second liquid supply path and opens and closes in response to opening and closing of the main valve. a second throttle provided in the second liquid supply path between the shut-off valve and the liquid level detection pipe; and a second restrictor provided between the second throttle and the shut-off valve. a first pressure channel communicating between the second liquid supply channel and the first pressure chamber; a first pressure channel communicating between the second fluid supply channel and the first pressure chamber; a second pressure impulse path that communicates with the second pressure impulse chamber, and a displacement of the second movable partition wall according to a hydraulic pressure difference between the first pressure impulse chamber and the second pressure impulse chamber. A liquid supply stop device comprising a lock release mechanism for releasing the lock mechanism and closing the pilot valve based on the above.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1979144845U JPH0121263Y2 (en) | 1979-10-19 | 1979-10-19 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1979144845U JPH0121263Y2 (en) | 1979-10-19 | 1979-10-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5662472U JPS5662472U (en) | 1981-05-26 |
JPH0121263Y2 true JPH0121263Y2 (en) | 1989-06-26 |
Family
ID=29376032
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1979144845U Expired JPH0121263Y2 (en) | 1979-10-19 | 1979-10-19 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0121263Y2 (en) |
-
1979
- 1979-10-19 JP JP1979144845U patent/JPH0121263Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5662472U (en) | 1981-05-26 |
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