WO1997008481A1 - Clapet de retenue anti 'coup de belier' a bascule - Google Patents
Clapet de retenue anti 'coup de belier' a bascule Download PDFInfo
- Publication number
- WO1997008481A1 WO1997008481A1 PCT/JP1996/002385 JP9602385W WO9708481A1 WO 1997008481 A1 WO1997008481 A1 WO 1997008481A1 JP 9602385 W JP9602385 W JP 9602385W WO 9708481 A1 WO9708481 A1 WO 9708481A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- spring
- force
- spindle
- water hammer
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
- F16K15/033—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member spring-loaded
Definitions
- the present invention relates to a swing type non-water hammer check valve that is installed in a pipeline for transferring a fluid to prevent back flow of the fluid and to safely and reliably prevent a water hammer action caused by the back flow of the fluid.
- water shall generically represent a fluid.
- valve body In the conventional swing type water hammer check valve, the valve body is closed without delay in response to the fluid flow, and the valve closing force against the valve opening force generated by the fluid flow is reduced. It is well known to use the biasing force of a spring having one end fixed to the valve body and the other end fixed to the valve box in order to obtain it.
- the sufficient valve closing force (sealing force) can be obtained even near the fully closed state.
- a structural force with a small change in the spring force with respect to the valve opening is preferable, but a spring structure in which one end is fixed to the valve body and the other end is fixed to the valve box is preferable.
- the present invention uses a valve shaft with a simple and rational structure that has an appropriate spring holding method and spring force adjustment method, and is capable of responding immediately to changes in flow and sealing when fully closed. The aim is to obtain a high-performance and economical water-resistant hammer check valve by making it possible to have power and to improve the sealing means to a simpler and more reliable means. Disclosure of the invention
- the swing type water hammer check valve of the present invention is a swing type check valve in which a valve body is pressed against a valve seat by a torsion spring or the like, and is required for a valve closing force of the valve body after the valve body is assembled to a valve box.
- the first feature is that the spring force is adjusted to only the spring force.
- valve shaft is rotated to generate a predetermined spring force and adjusted to a predetermined valve closing force, and then the valve shaft is fixed to the valve box with a knock pin or the like.
- a second feature is that a sealing means is provided in a portion near the fluid flow path on the valve shaft between the valve shaft and the valve bearing portion of the valve box. This makes it possible to easily obtain a high sealing property with respect to the outside.
- FIG. 1 is a perspective view (partially sectional view) showing one embodiment of the present invention.
- FIG. 2 is a cross-sectional view of a main part around the valve shaft in FIG.
- FIG. 3 is a perspective view (partially sectional view) showing another embodiment of the present invention.
- FIG. 4 is a cross-sectional view of a main part around the valve shaft in FIG.
- FIG. 5 is a sectional view showing various embodiments of the notch of the valve shaft. BEST MODE FOR CARRYING OUT THE INVENTION
- FIGS. 1 and 2 showing one embodiment.
- the valve body 2 and the spring 4 that can rotate freely with respect to the valve shaft 3 are assembled into the valve box 1 via the valve shaft 3, and one end of the spring 4 is set with a set pin. After fixing it by hooking it on the valve shaft 3 with 5, etc., rotate the valve shaft 3 until the other end of the spring 4 applies a predetermined closing force to the valve body 2, then attach it to the shaft end of the valve shaft 3.
- valve shaft 3 is fixed in the direction of rotation by the notch provided and the knock pin 6 attached to the valve box 1 to prevent rotation, and a screw plug 7a tightened from the left and right sides of the bearing of the valve box 1; 7b keeps the end of the valve shaft and seals.
- the shaft end used to prevent rotation of the valve shaft 3 in the rotation direction or the opposite shaft end has a notch to facilitate the rotation operation of the valve shaft 3 when adjusting the preload of the spring 4. Is provided.
- FIGS. 3 and 4 show an embodiment in which the structure around the valve shaft is further simplified.
- This uses an O-ring groove that is additionally processed at the position closest to the fluid flow path of the valve shaft 3, and regulates both the rotational direction and the axial direction with the knock pin 6, and obtains sealing performance with the 0 ring 8 Structure.
- the knock pin 6 located outside the O-ring 8 and the seal of the screw plugs 7a and 7b become unnecessary, and further, as shown in FIGS. a; 7 b Can be omitted.
- the shape of the notch at the shaft end of the valve shaft 3 and the structure of the detent can be semi-circular, polygonal, pin-hole, or slotted, as shown in Fig. 5.
- Various knock pins 6 corresponding to ⁇ e can be used.
- the dowel pins 6 are attached to the valve box 1 in advance, the spring 4 is fixed to the valve shaft 3 with the set bin 5, and the valve shaft 3 is rotated while rotating.
- the notch of the valve shaft 3 is as shown in a to e in Fig. 5) and push the valve shaft 3 to the predetermined axial direction.
- the shape of the notch and the knock pin 6 not only the rotation direction of the valve shaft 3 but also the axial position can be restricted at the same time.
- any shape corresponding to the jig for the rotation operation (with the concavity and convexity reversed) can be applied. It is.
- the shape of the valve body 2 and the valve seat 1a can be a perfect circle, an ellipse, an oval shape, etc.
- the position of the valve seat 1a can be set concentric with the center of the valve box 1, It can be set centered or inclined with respect to the flow line.
- the valve body 2 may be divided into two sections, a valve section and an arm section.
- the number of valve bodies is not limited to a single valve body device as in the embodiment, but can be applied to a plurality of valve bodies.
- Various types of sealing means for sealing the valve body 2 with respect to the valve seat 1a such as an O-ring, a gasket, a baked rubber material, and a metal touch, can be used.
- the structure of the present invention is simple, it can be applied to a flange-type check valve, a so-called wafer-type check valve, a gas damper, or the like. It is also possible to install a bypass valve between the inlet and outlet. Further, when the flow path conditions are complicated, a dash pot or the like for reducing the closing impact of the valve body may be provided.
- the force took up the Koiru type torsional Suburingu as a biasing spring of the valve body as an example?, It may also be used a plate-like spring Les,. In any case, it is obvious that it is better to use a spring with as low a spring constant as possible.
- the valve closing force of the valve body which balances with the pressing force of the valve body against the valve seat and the valve opening force generated by the flow of the fluid is very simple. Adjustable. Can be set.
- the spring since the spring is twisted together with the valve shaft and pre-loaded after assembly of the valve body, the same effect as mounting a sufficiently compressed spring can be obtained.Therefore, it is necessary to install a spring with a large spring force from the beginning. And the difference in spring force between when the valve is fully closed and when the valve is fully open can be minimized. s ' easy to achieve.
- valve bearing Since the seal part of the part is near the fluid flow path, there is no need to seal the knock pin on the evening side or the screw plug at the valve shaft end, and high sealing performance against the outside can be obtained at low cost. Become. In addition, the number of parts is small, and disassembly / assembly is possible with the spring released, and the work can be performed easily.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9510116A JP3035744B2 (ja) | 1995-08-29 | 1996-08-26 | スイング式無水撃逆止弁 |
AU67552/96A AU6755296A (en) | 1995-08-29 | 1996-08-26 | Swing type non-water hammer check valve |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22050795 | 1995-08-29 | ||
JP7/220507 | 1995-08-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997008481A1 true WO1997008481A1 (fr) | 1997-03-06 |
Family
ID=16752117
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1996/002385 WO1997008481A1 (fr) | 1995-08-29 | 1996-08-26 | Clapet de retenue anti 'coup de belier' a bascule |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU6755296A (ja) |
WO (1) | WO1997008481A1 (ja) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU741190B2 (en) * | 1997-03-07 | 2001-11-22 | Milnes Pty. Limited | Foot valve |
WO2002012643A2 (de) * | 2000-08-09 | 2002-02-14 | Zenner Gmbh & Co. Kgaa | Vorrichtung zum sicherstellen eines kontinuierlichen flüssigkeitsdurchgangs in flüssigkeitsleitungen und verwendung der vorrichtung |
JP2007008295A (ja) * | 2005-06-29 | 2007-01-18 | Piolax Inc | 燃料逆流防止弁 |
JP2013508625A (ja) * | 2009-10-23 | 2013-03-07 | カーク、リン | 一般的に床ドレンに挿入するための枢動フラップ型の逆止弁アセンブリ |
CN105135005A (zh) * | 2015-08-14 | 2015-12-09 | 南通市电站阀门有限公司 | 一种管线用防水锤机构旋启式止回阀 |
KR101652063B1 (ko) * | 2015-03-25 | 2016-08-30 | 강림중공업 주식회사 | 스윙 체크 밸브 |
CN106090342A (zh) * | 2016-08-29 | 2016-11-09 | 方正阀门集团(温州)机械制造有限公司 | 防低气流振动的止回阀 |
CN110360352A (zh) * | 2019-07-26 | 2019-10-22 | 浙江中驰阀业有限公司 | 一种可调节旋启式止回阀 |
CN111810684A (zh) * | 2020-07-17 | 2020-10-23 | 哈电集团哈尔滨电站阀门有限公司 | 一种低流阻缓闭式止回阀 |
-
1996
- 1996-08-26 WO PCT/JP1996/002385 patent/WO1997008481A1/ja active Application Filing
- 1996-08-26 AU AU67552/96A patent/AU6755296A/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
MICROFILM OF THE SPECIFICATION AND DRAWINGS ANNEXED TO THE WRITTEN APPLICATION OF JAPANESE UTILITY MODEL, Application No. 130478/1988 (Laid-open No. 51774/1990) (K.K. TOMOE GIJUTSU KENKYUSHO), 12 April 1990, pages 7-10. * |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU741190B2 (en) * | 1997-03-07 | 2001-11-22 | Milnes Pty. Limited | Foot valve |
WO2002012643A2 (de) * | 2000-08-09 | 2002-02-14 | Zenner Gmbh & Co. Kgaa | Vorrichtung zum sicherstellen eines kontinuierlichen flüssigkeitsdurchgangs in flüssigkeitsleitungen und verwendung der vorrichtung |
WO2002012643A3 (de) * | 2000-08-09 | 2002-07-25 | Zenner Gmbh & Co Kgaa | Vorrichtung zum sicherstellen eines kontinuierlichen flüssigkeitsdurchgangs in flüssigkeitsleitungen und verwendung der vorrichtung |
JP2007008295A (ja) * | 2005-06-29 | 2007-01-18 | Piolax Inc | 燃料逆流防止弁 |
JP4576298B2 (ja) * | 2005-06-29 | 2010-11-04 | 株式会社パイオラックス | 燃料逆流防止弁 |
JP2013508625A (ja) * | 2009-10-23 | 2013-03-07 | カーク、リン | 一般的に床ドレンに挿入するための枢動フラップ型の逆止弁アセンブリ |
KR101652063B1 (ko) * | 2015-03-25 | 2016-08-30 | 강림중공업 주식회사 | 스윙 체크 밸브 |
CN105135005A (zh) * | 2015-08-14 | 2015-12-09 | 南通市电站阀门有限公司 | 一种管线用防水锤机构旋启式止回阀 |
CN106090342A (zh) * | 2016-08-29 | 2016-11-09 | 方正阀门集团(温州)机械制造有限公司 | 防低气流振动的止回阀 |
CN106090342B (zh) * | 2016-08-29 | 2019-01-04 | 方正阀门集团(温州)机械制造有限公司 | 防低气流振动的止回阀 |
CN110360352A (zh) * | 2019-07-26 | 2019-10-22 | 浙江中驰阀业有限公司 | 一种可调节旋启式止回阀 |
CN111810684A (zh) * | 2020-07-17 | 2020-10-23 | 哈电集团哈尔滨电站阀门有限公司 | 一种低流阻缓闭式止回阀 |
Also Published As
Publication number | Publication date |
---|---|
AU6755296A (en) | 1997-03-19 |
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