JPH0317097Y2 - - Google Patents
Info
- Publication number
- JPH0317097Y2 JPH0317097Y2 JP1985050570U JP5057085U JPH0317097Y2 JP H0317097 Y2 JPH0317097 Y2 JP H0317097Y2 JP 1985050570 U JP1985050570 U JP 1985050570U JP 5057085 U JP5057085 U JP 5057085U JP H0317097 Y2 JPH0317097 Y2 JP H0317097Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- bypass
- switching lever
- valve body
- bypass valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000012530 fluid Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Landscapes
- Check Valves (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、所定の流量以下の状態でバイパス路
を開成してポンプ流量が所定の流量以下とならな
いようにしたバイパス弁を有する逆止弁に関する
ものである。[Detailed description of the invention] (Industrial application field) The present invention is a check valve having a bypass valve that opens a bypass path when the flow rate is below a predetermined flow rate to prevent the pump flow rate from falling below a predetermined flow rate. It is related to.
（従来の技術）
ポンプは、ポンプを流れる流体により冷却効果
を受けているので、ポンプ流量が所定の流量以下
となるとポンプが過熱され、損傷する虞がある。
特に近年の高ヘツドのポンプでは過熱により損傷
され易い。そこで、ポンプの吐出側に設けられた
逆止弁に、弁体の動きに連動して開閉されるバイ
パス弁を設け、逆止弁を流れる流量が所定流量以
下となるとこのバイパス弁を切り換えてバイパス
路を開成して、ポンプ流量が所定の流量以下とな
らないようにするバイパス弁を有する逆止弁が提
案されている。(Prior Art) Since a pump is cooled by the fluid flowing through the pump, if the pump flow rate falls below a predetermined flow rate, the pump may overheat and be damaged.
In particular, modern high-head pumps are easily damaged by overheating. Therefore, the check valve installed on the discharge side of the pump is equipped with a bypass valve that opens and closes in conjunction with the movement of the valve body, and when the flow rate through the check valve becomes less than a predetermined flow rate, the bypass valve is switched to bypass the pump. Check valves have been proposed that have a bypass valve that opens a passage to prevent the pump flow rate from falling below a predetermined flow rate.
従来のバイパス弁を有する逆止弁の一例の断面
図を第６図に示す。第６図において、バイパス弁
を有する逆止弁１は、弁胴２に弁座２ａが設けら
れ、この弁座２ａに弁体３が当接分離自在に配設
され、さらに弁体３は弾接部材４により弁座２ａ
方向に弾性附勢されている。なお、２ｂは逆止弁
１の流入側であり、２ｃは流出側である。さら
に、弁体３より流入側２ｂの流路に弁棒５が突設
され、この弁棒５にバイパス弁６の切換レバー７
が係合していて、弁体３の動きに応じて、切換レ
バー７が揺動される。この切換レバー７の揺動に
伴なつてバイパス弁６が制御される。そして、こ
のバイパス弁６の制御により、弁体３が閉成され
る際に、バイパス路８を開成させて流入側２ｂの
流体をバイパスさせている。バイパス弁６は、切
換レバー７の揺動に連動するパイロツト弁９と、
このパイロツト弁９の移動によりバイパス路８を
開閉させるバランスピストン１０で構成されてい
る。 A cross-sectional view of an example of a conventional check valve having a bypass valve is shown in FIG. In FIG. 6, a check valve 1 having a bypass valve has a valve body 2 provided with a valve seat 2a, a valve body 3 disposed in contact with and detachable from the valve seat 2a, and furthermore, the valve body 3 is elastic. Valve seat 2a by contact member 4
It is elastically biased in the direction. Note that 2b is the inflow side of the check valve 1, and 2c is the outflow side. Further, a valve rod 5 is provided protruding from the valve body 3 into the flow path on the inflow side 2b, and a switching lever 7 of the bypass valve 6 is attached to the valve rod 5.
is engaged, and the switching lever 7 is swung according to the movement of the valve body 3. As the switching lever 7 swings, the bypass valve 6 is controlled. By controlling the bypass valve 6, when the valve body 3 is closed, the bypass passage 8 is opened and the fluid on the inflow side 2b is bypassed. The bypass valve 6 includes a pilot valve 9 that is linked to the swinging of the switching lever 7;
It is comprised of a balance piston 10 that opens and closes the bypass passage 8 by the movement of the pilot valve 9.
かかる構造において、まず、所定以上の流量が
逆止弁１を流れる開成状態では、流体の圧力によ
り弁体３は弁座２ａから分離して第６図で上方の
流出側２ｃに移動した状態であ。そこで、切換レ
バー７も第６図の上方に揺動され、パイロツト弁
９は流体から受ける上下方向の圧力差により下降
し、バランスプストン１０が第６図で右側に移動
してバイパス路８を閉成した状態となる。 In this structure, first, in the open state where a flow rate of a predetermined amount or more flows through the check valve 1, the valve body 3 is separated from the valve seat 2a due to the pressure of the fluid and moved upward to the outflow side 2c in FIG. a. Therefore, the switching lever 7 is also swung upward in FIG. 6, the pilot valve 9 is lowered by the vertical pressure difference received from the fluid, and the balance stone 10 is moved to the right in FIG. It is in a closed state.
次に、逆止弁１を流れる流量が所定以下まで低
下し若しくは流れが遮断されると、弁体３は弁座
２ａに近接し若しくは密着した状態となり、弁棒
５が第６図のごとく下方に移動した状態となる。
そこで、切換レバー７も第６図の下方に揺動され
て、パイロツト弁９が押し上げられ、バランスピ
ストン１０を第６図の左側に移動させてバイパス
路８を開成させてバイパス経路を形成し、逆止弁
１の流入側２ｂの流体がバイパスされる。 Next, when the flow rate flowing through the check valve 1 decreases to a predetermined level or less or the flow is cut off, the valve body 3 comes close to or in close contact with the valve seat 2a, and the valve stem 5 moves downward as shown in FIG. It will be in a state where it has moved to .
Therefore, the switching lever 7 is also swung downward in FIG. 6, the pilot valve 9 is pushed up, the balance piston 10 is moved to the left in FIG. 6, and the bypass path 8 is opened to form a bypass path. The fluid on the inflow side 2b of the check valve 1 is bypassed.
したがつて、逆止弁１の流入側２ｂには常に所
定の流量が流れ込むことができ、ポンプ流量が所
定の流量以下となり過熱等によりポンプが損傷を
受けるのを防止することができる。 Therefore, a predetermined flow rate can always flow into the inflow side 2b of the check valve 1, and it is possible to prevent the pump flow rate from falling below the predetermined flow rate and damage to the pump due to overheating or the like.
（考案が解決しようとする問題点）
ところで、上記の従来のバイパス弁を有する逆
止弁は、バイパス弁９を制御するための切換レバ
ー７が主流量が通過する流入側２ｂの流路内に配
設されている。このために、主流量の流れの影響
を受けて、主流量の流速の変化等により切換レバ
ー７は振動等を受け易く、切換レバー７および切
換レバー７に接触する部分の摩耗等の損傷を受け
易い。また、主流量の流路内に切換レバー７が配
設されているので、それだけ逆止弁１を通過する
流体に与える流体抵抗が大きくなる等の問題点が
あつた。(Problems to be Solved by the Invention) By the way, in the conventional check valve having the bypass valve described above, the switching lever 7 for controlling the bypass valve 9 is located in the flow path on the inflow side 2b through which the main flow passes. It is arranged. Therefore, under the influence of the flow of the main flow, the switching lever 7 is susceptible to vibrations due to changes in the flow velocity of the main flow, etc., and the switching lever 7 and the parts that contact the switching lever 7 are susceptible to damage such as wear. easy. Further, since the switching lever 7 is disposed within the flow path of the main flow, there is a problem that the fluid resistance exerted on the fluid passing through the check valve 1 increases accordingly.
本考案の目的は、上記の従来のバイパス弁を有
する逆止弁の問題点を解消すべくなされたもの
で、逆止弁の弁胴の流入側の流路に連通させて主
流量が流れないバイパス弁制御室を設け、このバ
イパス弁制御室にバイパス弁を制御する切換レバ
ーを配設して、切換レバーが主流量のの影響を受
けることなく、また、主流量に与える流体抵抗が
大きくならないようにしたバイパス弁を有する逆
止弁を提供することにある。 The purpose of the present invention was to solve the problems of conventional check valves with bypass valves as described above. A bypass valve control chamber is provided, and a switching lever for controlling the bypass valve is disposed in this bypass valve control room, so that the switching lever is not affected by the main flow, and the fluid resistance exerted on the main flow does not increase. An object of the present invention is to provide a check valve having a bypass valve as described above.
（問題点を解決するための手段）
かかる目的を達成するために、本考案のバイパ
ス弁を有する逆止弁は、逆止弁の弁体に弁棒を突
設し、この弁棒を流入側の弁胴に貫通させ、この
貫通突出した前記弁棒を覆うとともに前記弁胴の
流入側の流路に連通するが主流量の流れないバイ
パス弁制御室を形成するようにバイパス管を前記
弁胴の外側に設け、このバイパス弁制御室に前記
弁棒の動きにより揺動する切換レバーを配設し、
この切換レバーの揺動によりバイパス弁を制御さ
せて、前記バイパス弁制御室に連通させて設けら
れたバイパス路を開閉制御するように構成されて
いる。(Means for Solving the Problems) In order to achieve the above object, the check valve having the bypass valve of the present invention has a valve stem protruding from the valve body of the check valve, and this valve stem is connected to the inflow side. A bypass pipe is inserted into the valve body so as to cover the valve rod protruding through the valve body and form a bypass valve control chamber that communicates with the flow path on the inflow side of the valve body but through which no main flow flows. A switching lever is provided on the outside of the bypass valve, and a switching lever that swings by the movement of the valve stem is disposed in the bypass valve control chamber.
The bypass valve is controlled by the swinging of the switching lever, thereby controlling the opening and closing of the bypass passage provided in communication with the bypass valve control chamber.
（作用）
逆止弁の弁胴の流入側の流路に連通させて主流
量が流れないバイパス弁制御室を設け、このバイ
パス弁制御室にバイパス弁を制御する切換レバー
を配設し、弁体の動きによりこの切換レバーを制
御するようにしたので、切換レバーが主流量の影
響を受けることがなく、切換レバーおよび切換レ
バーに接触する部材の摩耗等の損傷を少なくする
ことができる。また、切換レバーが主流量の流路
に配設されていないので、主流量に与える流体抵
抗を大きくすることがない。(Function) A bypass valve control chamber is provided that communicates with the flow path on the inflow side of the valve body of the check valve so that the main flow does not flow, and a switching lever for controlling the bypass valve is disposed in this bypass valve control chamber. Since the switching lever is controlled by the movement of the body, the switching lever is not affected by the amount of main flow, and damage such as wear to the switching lever and the members that contact the switching lever can be reduced. Further, since the switching lever is not disposed in the flow path of the main flow, the fluid resistance exerted on the main flow does not become large.
（実施例の説明）
以下、本考案の実施例を第１図ないし第５図を
参照して説明する。第１図は、本考案のバイパス
弁を有する逆止弁の一実施例の断面図であり、第
２図および第３図は、本考案のバイパス弁を有す
る逆止弁の開閉状態のバイパス弁の動作を説明す
るための図であり、第４図は、第２図のＡ矢視図
であり、第５図は、第２図のＢ−Ｂ断面図であ
る。(Description of Embodiments) Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 is a sectional view of one embodiment of a check valve having a bypass valve of the present invention, and FIGS. 2 and 3 show the bypass valve in an open and closed state of the check valve having a bypass valve of the present invention. FIG. 4 is a view taken along arrow A in FIG. 2, and FIG. 5 is a sectional view taken along line BB in FIG. 2.
第１図ないし第５図において、バイパス弁を有
する逆止弁２０は、グロブ弁式の逆止弁で構成さ
れ、弁胴２１に弁座２１ａが設けられ、この弁座
２１ａに弁体２２が接触分離自在に配設され、さ
らに、弁体２２は弾性部材２３により弁座２１ａ
方向に弾性附勢されている。なお、２１ｂは逆止
弁２０の流入側であり、２１ｃは流出側であり、
２４は弁蓋である。そして、弁体２２より流入側
２１ｂに弁棒２５が突設され、この弁棒２５が弁
胴２１を貫通している。さらに、弁胴２１の外側
にバイパス管２７が設けられて、弁胴２１を貫通
突出している弁棒２５を覆うとともに、弁胴２１
の流入側２１ｂの流路に連通するようにバイパス
弁制御室２６が形成される。なお、このバイパス
弁制御室２６は、流入側２１ｂから流出側２１ｃ
に至る主流量の流れる流路の外に設けられてい
る。そして、このバイパス弁制御室２６にバイパ
ス弁２８を制御する切換レバー２９が配設されて
いる。この切換レバー２９は軸３０により一方の
遊端部が上下方向に揺動自在に構成され、その一
方の遊端部にナツト３１により適宜の長さで固定
される調整ボルト３２が設けられて、弁棒２５の
先端部２５ａに当接されている。 In FIGS. 1 to 5, a check valve 20 having a bypass valve is a glob valve type check valve, and a valve body 21 is provided with a valve seat 21a, and a valve body 22 is mounted on the valve seat 21a. The valve body 22 is arranged so as to be able to come into contact with and be separated from the valve seat 21a by an elastic member 23.
It is elastically biased in the direction. Note that 21b is the inflow side of the check valve 20, 21c is the outflow side,
24 is a valve cover. A valve rod 25 is provided protruding from the valve body 22 toward the inflow side 21b, and this valve rod 25 penetrates the valve body 21. Furthermore, a bypass pipe 27 is provided on the outside of the valve body 21 to cover the valve rod 25 that protrudes through the valve body 21 and
A bypass valve control chamber 26 is formed so as to communicate with the flow path on the inflow side 21b. Note that this bypass valve control chamber 26 has an inflow side 21b to an outflow side 21c.
It is provided outside the flow path through which the main flow reaches. A switching lever 29 for controlling the bypass valve 28 is disposed in the bypass valve control chamber 26 . The switching lever 29 is configured such that one free end can swing vertically around a shaft 30, and an adjustment bolt 32 fixed at an appropriate length with a nut 31 is provided on the one free end. It is in contact with the tip 25a of the valve stem 25.
ここでバイパス弁２８につき詳細に説明する。
バイパス管２７内に配設されたパイロツト弁胴３
３に切換レバー２９が軸３０で軸支されていて、
揺動する切換レバー２９の他方の端部でバイパス
弁３４を押し上げ得るように構成されている。そ
して、このパイロツト弁３４は、流体から受ける
上下方向の圧力差で押し下げられる力が作用する
ように構成されている。また、パイロツト弁３４
に溝３４ａが刻設され、パイロツト弁３４の上下
動によりパイロツト穴３４ｂが高圧若しくは低圧
に切り換えられ、バランスピストン３５が左右に
移動されて、バイパス弁制御室２６に連通させて
パイロツト弁胴３３に穿設されたバイパス路３６
が開閉制御されるように構成されている。 Here, the bypass valve 28 will be explained in detail.
Pilot valve body 3 disposed within bypass pipe 27
3, a switching lever 29 is supported by a shaft 30,
The other end of the swinging switching lever 29 is configured to push up the bypass valve 34. The pilot valve 34 is configured so that a downward force is applied to it due to the vertical pressure difference received from the fluid. In addition, the pilot valve 34
A groove 34a is carved in the pilot valve body 33, and the pilot hole 34b is switched to high pressure or low pressure by vertical movement of the pilot valve 34, and the balance piston 35 is moved left and right to communicate with the bypass valve control chamber 26 and connect the pilot valve body 33. Perforated bypass path 36
is configured so that opening and closing are controlled.
かかる構成において、第１図のごとく、逆止弁
２０を流れる流量が所定以下まで低下し若しくは
流れが遮断されて、弁体２２が弁座２１ａに近接
し若しくは密着された状態では、第２図のごとく
弁棒２５が下つた状態であり、調整ボルト３２を
押し下げて切換レバー２９を下方に揺動させて、
パイロツト弁３４を引き上げる。このパイロツト
弁３４が引き上げられることによりパイロツト穴
３４ｂを低圧とし、バランスピストン３５が左側
に移動させられてバイパス路３６が開成される。
よつて、逆止弁２０の流入側２１ｂの流体は、バ
イパス弁制御室２６よりバイパス路３６を介して
バイパスされる。 In such a configuration, as shown in FIG. 1, when the flow rate flowing through the check valve 20 is reduced to a predetermined level or less or the flow is blocked and the valve body 22 is close to or in close contact with the valve seat 21a, as shown in FIG. The valve stem 25 is in a lowered state as shown in FIG.
Pull up the pilot valve 34. By pulling up the pilot valve 34, the pressure in the pilot hole 34b is set to a low level, and the balance piston 35 is moved to the left to open the bypass passage 36.
Therefore, the fluid on the inflow side 21b of the check valve 20 is bypassed from the bypass valve control chamber 26 via the bypass path 36.
また、所定以上の流量が流れて弁体２２が流体
圧により弁座２１ａより分離した状態では、第３
図のごとく、弁棒２５が上つた状態であり、パイ
ロツト弁３４は流体から受ける上下方向の圧力差
により押し下げられて、切換レバー２９を上方に
揺動させるとともにパイロツト穴３４ｂを高圧に
切り換え、バランスピストン３５が右側に移動さ
せられてバイパス路３６が閉成される。よつて、
逆止弁２０が閉成状態であれば、流入側２１ｂの
流体はバイパス路３６を介してバイパスされるこ
とがない。 In addition, when the flow rate exceeds a predetermined value and the valve body 22 is separated from the valve seat 21a due to fluid pressure, the third
As shown in the figure, the valve stem 25 is in the upward state, and the pilot valve 34 is pushed down by the vertical pressure difference received from the fluid, causing the switching lever 29 to swing upward and switching the pilot hole 34b to high pressure, thereby adjusting the balance. The piston 35 is moved to the right and the bypass passage 36 is closed. Then,
If the check valve 20 is in the closed state, the fluid on the inflow side 21b will not be bypassed via the bypass path 36.
ここで、バイパス弁制御室２６は逆止弁２０の
流入側２１ｂから流出側２１ｃに至る主流量の流
路の外に設けられているので、主流量の流速等の
変動を大きく受けることがない。このために、切
換レバー２９が主流量の流速の変化等の影響を受
けて振動したりすることがなく、切換レバー２９
および切換レバー２９に接触する部材の摩耗等に
よる損傷が少なく、耐久性を向上させることがで
きる。また、上記実施例のように、弁胴２１とバ
イパス弁制御室２６を付設するためのバイパス管
２７を別体で構成すれば、弁胴２１からバイパス
管２７を取り外して容易にバイパス弁２８のメン
テナンスをすることができるとともに、バイパス
管２７の取り付け向きを任意に設けることができ
る。さらに、上記実施例では、逆止弁２０がグロ
ーブ弁で構成されているので、弁蓋２４を取り外
して容易に逆止弁２０のメンテナンスをすること
ができる。 Here, since the bypass valve control chamber 26 is provided outside the flow path of the main flow from the inflow side 21b to the outflow side 21c of the check valve 20, it is not subject to large fluctuations in the flow velocity of the main flow, etc. . Therefore, the switching lever 29 does not vibrate due to changes in the flow velocity of the main flow, and the switching lever 29
Furthermore, there is less damage caused by wear and the like to the members that come into contact with the switching lever 29, and durability can be improved. Further, as in the above embodiment, if the valve body 21 and the bypass pipe 27 for attaching the bypass valve control chamber 26 are constructed separately, the bypass pipe 27 can be removed from the valve body 21 and the bypass valve 28 can be easily installed. Maintenance can be performed, and the bypass pipe 27 can be installed in any direction. Furthermore, in the embodiment described above, since the check valve 20 is constituted by a globe valve, the check valve 20 can be easily maintained by removing the valve cover 24.
なお、上記の実施例では、弁胴２１とバイパス
管２７を別体で構成したが一体的に構成しても良
いことは勿論であ。また、上記の実施例ではリフ
ト式の逆止弁で説明したが、本考案をスイング式
の逆止弁に適用しても良きものである。 In the above embodiment, the valve body 21 and the bypass pipe 27 are constructed separately, but it goes without saying that they may be constructed integrally. Further, although the above embodiments have been explained using a lift type check valve, the present invention may also be applied to a swing type check valve.
（考案の効果）
以上説明したように、本考案に係わるバイパス
弁を有する逆止弁によれば、逆止弁の弁胴の流入
側の流路に連通させて主流量が流れることのない
バイパス弁制御室を設け、このバイパス弁制御室
にバイパス弁を制御する切換レバーを配設して、
弁体の動きによりこの切換レバーを制御するよう
にしたので、切換レバーが主流量の流速の変化等
の影響を受けることがなく、切換レバーおよび切
換レバーに接触する部材が摩耗等による損傷を少
なくすることができ、バイパス弁を有する逆止弁
の耐久性を向上させることができる。また、切換
レバーが主流量の流路に配設されていないので、
逆止弁を流れる主流量に与える流体抵抗を大きく
することがない等の優れた効果を奏する。(Effect of the invention) As explained above, according to the check valve having the bypass valve according to the invention, the bypass valve is connected to the flow path on the inflow side of the valve body of the check valve so that the main flow does not flow. A valve control room is provided, a switching lever for controlling the bypass valve is arranged in this bypass valve control room,
Since the switching lever is controlled by the movement of the valve body, the switching lever is not affected by changes in the flow velocity of the main flow, and the switching lever and the members that come into contact with the switching lever are less likely to be damaged by wear. It is possible to improve the durability of a check valve having a bypass valve. In addition, since the switching lever is not located in the main flow path,
This provides excellent effects such as not increasing the fluid resistance exerted on the flow of the main flow through the check valve.
第１図は、本考案のバイパス弁を有する逆止弁
の一実施例の断面図であり、第２図は、本考案の
バイパス弁を有する逆止弁の閉成状態のバイパス
弁の動作を説明するための図であり、第３図は、
本考案のバイパス弁を有する逆止弁が開成状態の
バイパス弁の動作を説明するための図であり、第
４図は、第２図のＡ矢視図であり、第５図は、第
２図のＢ−Ｂ断面図であり、第６図は、従来のバ
イパス弁を有する逆止弁の一例の断面図である。
１，２０：バイパス弁を有する逆止弁、２，２
１：弁胴、２ｂ，２１ｂ：流入側、３，２２：弁
体、５，２５：弁棒、６，２８：バイパス弁、
７，２９：切換レバー、８，３６：バイパス路、
２６：バイパス弁制御室。
FIG. 1 is a sectional view of an embodiment of a check valve having a bypass valve of the present invention, and FIG. 2 shows the operation of the bypass valve in a closed state of the check valve having a bypass valve of the present invention. This is a diagram for explaining, and FIG.
FIG. 4 is a view in the direction of arrow A in FIG. 2, and FIG. 5 is a view in the direction of arrow A in FIG. 6 is a sectional view taken along line BB in the figure, and FIG. 6 is a sectional view of an example of a check valve having a conventional bypass valve. 1, 20: Check valve with bypass valve, 2, 2
1: Valve body, 2b, 21b: Inflow side, 3, 22: Valve body, 5, 25: Valve stem, 6, 28: Bypass valve,
7, 29: switching lever, 8, 36: bypass path,
26: Bypass valve control room.
Claims (1)
側の弁胴に貫通させ、この貫通突出した前記弁棒
を覆うとともに前記弁胴の流入側の流路に連通す
るが主流量の流れないバイパス弁制御室を形成す
るようにバイパス管を前記弁胴の外側に設け、こ
のバイパス弁制御室に前記弁棒の動きにより揺動
する切換レバーを配設し、この切換レバーの揺動
によりバイパス弁を制御させて、前記バイパス弁
制御室に連通させて設けられたバイパス路を開閉
制御するように構成したことを特徴とするバイパ
ス弁を有する逆止弁。 A valve stem is provided protruding from the valve body of the check valve, and this valve stem is passed through the valve body on the inflow side, and the valve stem that protrudes through is covered and communicated with the flow path on the inflow side of the valve body. A bypass pipe is provided outside the valve body so as to form a bypass valve control chamber through which no main flow flows, and a switching lever that swings by the movement of the valve stem is provided in the bypass valve control chamber. 1. A check valve having a bypass valve, characterized in that the bypass valve is controlled by the swinging motion of the bypass valve to open and close a bypass passage provided in communication with the bypass valve control chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985050570U JPH0317097Y2 (en) | 1985-04-06 | 1985-04-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985050570U JPH0317097Y2 (en) | 1985-04-06 | 1985-04-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61168364U JPS61168364U (en) | 1986-10-18 |
| JPH0317097Y2 true JPH0317097Y2 (en) | 1991-04-11 |
Family
ID=30568828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985050570U Expired JPH0317097Y2 (en) | 1985-04-06 | 1985-04-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0317097Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4655982B2 (en) * | 2006-03-31 | 2011-03-23 | 株式会社富士通ゼネラル | Release valve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5822474B2 (en) * | 1980-06-10 | 1983-05-09 | 天野製薬株式会社 | Method for producing cholecystokinin pancreozymin C-terminal peptide amide sulfate ester |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5822474U (en) * | 1981-08-04 | 1983-02-12 | 江口 勝美 | Check valve for pump |
-
1985
- 1985-04-06 JP JP1985050570U patent/JPH0317097Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5822474B2 (en) * | 1980-06-10 | 1983-05-09 | 天野製薬株式会社 | Method for producing cholecystokinin pancreozymin C-terminal peptide amide sulfate ester |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61168364U (en) | 1986-10-18 |
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