CN101363550B - Check valve structure - Google Patents
Check valve structure Download PDFInfo
- Publication number
- CN101363550B CN101363550B CN200710070714XA CN200710070714A CN101363550B CN 101363550 B CN101363550 B CN 101363550B CN 200710070714X A CN200710070714X A CN 200710070714XA CN 200710070714 A CN200710070714 A CN 200710070714A CN 101363550 B CN101363550 B CN 101363550B
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- cavity
- piston
- check valve
- fittings body
- attachment hole
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Abstract
The invention discloses a check valve structure which comprises a fittings body that is provided with two cavities and a piston; wherein, a first cavity is communicated with the two ends of the fittings body, and a second cavity is communicated with the lateral surface of the fittings body; the second cavity is communicated with the first cavity by a connecting hole; the piston is movably arranged at the opening part of the connecting hole, and a sealing surface is arranged in the connecting part of the two; the length of the piston in the connecting hole is shorter than the depth of the connecting hole. Owing to the defect of the existing check valve, the invention redesigns non-return structure, adopts a principle of directly removing a valve body or the vacuum in a water pipe to solve the problem of reverse pumping of polluted water, and has the advantages of smart design, little parts and simple and reliable structure.
Description
Technical field
The present invention relates to a kind of check valve structure, be particularly useful for the check valve structure of liquid aspect.
Background technique
In the middle of people's life, the phenomenon of cutting off the water supply suddenly under the fittings body opening state happens occasionally, and the moment of cutting off the water supply, inertial flow reason because of liquid, when fittings body leading portion fluid stopped suddenly, its back segment liquid can continue to flow, and its result will produce vacuum in the fittings body cavity, the component that the stream of drawing back that causes sewage, butt joint body pollute or the butt joint body is interior produce corrosion.For avoiding the generation of this phenomenon, people tend to connect at the water outlet place check valve structure are set.
Existing check valve structure, safety check as publication number CN2821326, its structure as shown in Figure 1, comprise valve body 1 ', spool 2 ', spring 3 ' and spring seat 4 ', wherein spring seat 4 ' be square is fixed on valve body water outlet place by screw, spring 3 ' be arranged on spring seat 4 ' spring eye on, spring 3 ' the other end withstand on spool 2 ' on, spool 2 ' front-end face spring 3 ' effect under withstand on valve inleting water mouth place.When water when the water source flows to water outlet, as long as hydraulic pressure enough overcome spring 3 ' elastic force can realize conducting, and when aqueous reflux, because of water (flow) direction consistent with the action direction of spring 3 ' restoring force, spool 2 ' quilt withstood on valve inleting water mouth place realization and ended this moment, played the effect that prevents aqueous reflux.This type of check valve structure adopts parts more, assembling inconvenience, and spring is very thin perishable, and rate of fault height, working life lack.
Summary of the invention
The present invention is directed to the defective that existing safety check exists, a kind of new check valve structure is provided, it directly adopts the principle of eliminating vacuum in valve body or the water pipe to solve the stream of drawing back of sewage, it is few that this structure has parts, easy to assembly, simple and reliable for structure, the characteristics of long service life.
For achieving the above object, the present invention is by the following technical solutions:
A kind of check valve structure, comprise a fittings body and a piston, it is characterized in that: fittings body is provided with two cavitys, and wherein first cavity is communicated with the fittings body two ends, second cavity directly communicates with the fittings body side, is communicated with by an attachment hole between second cavity and first cavity; Described piston activity is assemblied in the attachment hole oral area, and is provided with a sealing surface in both joints, and piston places the degree of depth of the interior length of attachment hole less than attachment hole.
The first above-mentioned cavity is one, two or more through hole.
The second above-mentioned cavity is one, two or more pore.
The sealing surface of above-mentioned piston and attachment hole oral area is provided with seal ring.
Above-mentioned piston is made by rubber, plastics or metallic material.
The sealing surface of above-mentioned attachment hole oral area and piston is a tapered slope.
The top of the above-mentioned fittings body pipe connecting component that is threaded, and be provided with gasket seal in both joints.
Shown in the stereochemical structure sectional view of the stop valve of the band structure of the present invention of Figure of description 8, under normal circumstances, when valve opening, under the effect of gravity or hydraulic pressure, the sealing that offsets of piston in the non-return structure and the attachment hole oral area in the fittings body, make second cavity not with pipeline connection, liquid directly flows through fittings body by first cavity on the fittings body and flows to water outlet.Arrhea and work as pipeline suddenly, under the effect of liquid inertia power, the non-return structure leading portion will form vacuum, this moment is under the atmospheric effect in the external world, air enters attachment hole and pushes piston open by second cavity and enters fittings body, vacuum is faded away, thereby realize that the pipeline inner and outer air pressure keeps basically identical, prevent that sewage from flowing backwards.Structure of the present invention is not only applicable to the occasion of water, is applicable to fluid occasions such as oil, liquid metal, chemical mediator yet.
In addition, for strengthening the sealing between piston and fittings body, be provided with seal ring in both joints.Perhaps piston adopts rubber, plastics or metallic material such as copper, steel, utilizes the material behavior of piston self, can directly utilize sealing surface to guarantee sealing between itself and fittings body.
Check valve structure of the present invention comprises a fittings body and piston, adds a seal ring at most again, and structural design is ingenious, and parts are few, and simple and reliable.
Description of drawings
The plane structure schematic representation of Fig. 1, existing check valve structure;
Fig. 2, perspective view of the present invention;
Fig. 3, plane structure sectional view of the present invention;
Fig. 4, three-dimensional cross-sectional schematic of the present invention;
The plane structure sectional view of Fig. 5, second kind of mode of execution of the present invention;
The plane structure sectional view of Fig. 6, the third mode of execution of the present invention;
The plane structure sectional view of Fig. 7, band link of the present invention;
Fig. 8, with the stereochemical structure sectional view of stop valve of the present invention.
Embodiment
Shown in Fig. 2,3 and 4, a kind of check valve structure comprises a fittings body 1, fittings body is provided with first cavity 11 that is communicated with up and down, and it adopts the four-way hole structure in the present embodiment, and is circularly and evenly distributed, here, through hole also can be one, two or more.Also be provided with second cavity 12 that directly is communicated with the fittings body side on the fittings body 1 simultaneously, second cavity 12 is communicated with by an attachment hole 13 with first cavity 11, attachment hole 13 oral area activities are equipped with a piston 2, piston 2 places length in the attachment hole 13 less than the degree of depth of attachment hole 13, at this, for guaranteeing the sealing of piston 2 and attachment hole 13 oral areas, be provided with a sealing surface 21 in both joints.Second cavity 12 is four air hole structures in the present embodiment, and is circularly and evenly distributed, and here, pore also can be one, two or more.
Under normal circumstances, when valve opening, under the effect of gravity or hydraulic pressure, the attachment hole 13 oral areas sealing that offsets on piston in the non-return structure 2 and the fittings body, second cavity 12 is not communicated with first cavity 11, and liquid directly flows through fittings body by first cavity 11 on the fittings body 1 and flows to water outlet.Arrhea and work as pipeline suddenly, under the effect of liquid inertia power, the non-return structure leading portion will form vacuum, this moment is under the atmospheric effect in the external world, the pore of air by second cavity 12 enters attachment hole 13 and pushes piston 2 open and enter fittings body 1 upper-end surface, thereby vacuum is faded away, realize pipeline inner and outer air pressure unanimity, prevent that sewage from flowing backwards.
At this, for strengthening the sealing between attachment hole 13 oral areas on piston 2 and the fittings body 1, both sealing surfaces are provided with seal ring 3, and seal ring 3 can be arranged on the piston, as shown in Figure 3; Also can be arranged on the fittings body 1, as shown in Figure 5; Perhaps piston 2 adopts rubber, plastics or metallic material such as copper, steel, utilize the material behavior of piston 2 self, can directly guarantee the sealing of itself and attachment hole 13 oral areas, its structure schematic representation as shown in Figure 6, simultaneously, be the sealing of assurance piston 2 with the surface of contact of fittings body 1, the sealing surface 21 of attachment hole 13 oral areas and piston 2 is arranged to tapered slope.
Check valve structure of the present invention comprises a fittings body 1 and piston 2, adds a seal ring 3 at most again, and the structural design of invention is ingenious, and parts are few, and simple and reliable.
For making the present invention be convenient to be connected with pipeline or valve, the top of fittings body 1 pipe connecting component 4 that is threaded, and be provided with gasket seal 5 to guarantee sealing in both joints, its structure is as shown in Figure 7; In addition, the present invention also can directly be connected or be made of one the formula design with valves such as stop valve, angle valves, as of the present invention shown in Figure 8, the water outlet 61 of stop valve 6 connects by screw thread 62 with non-return structure of the present invention, be provided with a gasket seal 63 in both joints, increase the sealing effect of stop valve and non-return structure.
The above, it only is better embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation know-why of the present invention still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (7)
1. check valve structure, comprise a fittings body and a piston, it is characterized in that: fittings body is provided with two cavitys, and wherein first cavity is communicated with the fittings body two ends, second cavity directly communicates with the side of fittings body, is communicated with by an attachment hole between second cavity and first cavity; Described piston activity is assemblied in the attachment hole oral area, and is provided with a sealing surface in both joints, and piston places the degree of depth of the interior length of attachment hole less than attachment hole.
2. a kind of check valve structure as claimed in claim 1 is characterized in that: described first cavity is one, two or more through hole.
3. a kind of check valve structure as claimed in claim 1 is characterized in that: described second cavity is one, two or more pore.
4. as claim 1,2 or 3 described a kind of check valve structures, it is characterized in that: the sealing surface of described piston and attachment hole oral area is provided with seal ring.
5. as claim 1,2 or 3 described a kind of check valve structures, it is characterized in that: described piston is made by rubber, plastics or metallic material.
6. a kind of check valve structure as claimed in claim 5 is characterized in that: the sealing surface of described attachment hole oral area and piston is a tapered slope.
7. a kind of check valve structure as claimed in claim 1 is characterized in that: the top of the described fittings body pipe connecting component that is threaded, and be provided with gasket seal in both joints.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710070714XA CN101363550B (en) | 2007-08-06 | 2007-08-06 | Check valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710070714XA CN101363550B (en) | 2007-08-06 | 2007-08-06 | Check valve structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101363550A CN101363550A (en) | 2009-02-11 |
| CN101363550B true CN101363550B (en) | 2011-09-28 |
Family
ID=40390075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710070714XA Expired - Fee Related CN101363550B (en) | 2007-08-06 | 2007-08-06 | Check valve structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101363550B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537435B (en) * | 2012-02-27 | 2013-09-18 | 宁波华成阀门有限公司 | Anti-siphon backflow guide-type electromagnetic valve |
| CN103352997B (en) * | 2013-07-03 | 2016-04-27 | 杭州神林电子有限公司 | With the solenoid valve of negative pressure destructive backstop |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4674529A (en) * | 1986-05-14 | 1987-06-23 | Ferguson Sean M | Check valve |
| CN2221139Y (en) * | 1995-03-17 | 1996-02-28 | 张志中 | Water pump automatic intake and exhaust valve |
| CN2230383Y (en) * | 1995-08-24 | 1996-07-03 | 刘继红 | Non-return air-inlet valve for fresh-beer cabinet |
| US5725018A (en) * | 1994-09-16 | 1998-03-10 | Paczonay; Joseph R. | Gravity check valve |
| CN2682256Y (en) * | 2004-02-23 | 2005-03-02 | 戚征宇 | Non-return plug valve |
-
2007
- 2007-08-06 CN CN200710070714XA patent/CN101363550B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4674529A (en) * | 1986-05-14 | 1987-06-23 | Ferguson Sean M | Check valve |
| US5725018A (en) * | 1994-09-16 | 1998-03-10 | Paczonay; Joseph R. | Gravity check valve |
| CN2221139Y (en) * | 1995-03-17 | 1996-02-28 | 张志中 | Water pump automatic intake and exhaust valve |
| CN2230383Y (en) * | 1995-08-24 | 1996-07-03 | 刘继红 | Non-return air-inlet valve for fresh-beer cabinet |
| CN2682256Y (en) * | 2004-02-23 | 2005-03-02 | 戚征宇 | Non-return plug valve |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2005-54406A 2005.03.03 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101363550A (en) | 2009-02-11 |
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| C06 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20170806 |
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| CF01 | Termination of patent right due to non-payment of annual fee |