CN204533670U - A kind of secondary check valve - Google Patents
A kind of secondary check valve Download PDFInfo
- Publication number
- CN204533670U CN204533670U CN201520045554.3U CN201520045554U CN204533670U CN 204533670 U CN204533670 U CN 204533670U CN 201520045554 U CN201520045554 U CN 201520045554U CN 204533670 U CN204533670 U CN 204533670U
- Authority
- CN
- China
- Prior art keywords
- check valve
- valve body
- valve
- fixed base
- circlip
- 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 - Fee Related
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- Check Valves (AREA)
Abstract
The utility model discloses a kind of secondary check valve, comprise valve body, check valve assembly, circlip, pad, bolt, O type circle, snap ring and cutting ferrule, installation cavity is formed in valve body, described check valve assembly, circlip, pad is installed in the installation cavity of described valve body, the two ends of valve body are provided with snap ring and cutting ferrule, two check valve assemblies are connected in installation cavity successively, make it simple and reasonable, be more prone to assembling produce, can more effectively prevent downstream water from flowing backwards reliably, valve body is provided with pressure gauge mounting hole, can setting pressure table or differential pressure indicator by mounting hole, pressure loss during valve open can be detected, or judge whether safety check lost efficacy.
Description
Technical field
The utility model relates to valve technology field, particularly relates to a kind of secondary check valve that can prevent reverse flow of fluids in valve.
Background technique
In existing engineering, there are many occasions to use valve, especially in chemical industry, hydraulic engineering, need the keying original paper that valve flows as fluid.Need to ensure that fluid is along the flowing of fixing direction in some engineering, prevent reverse flow of fluids, technician have devised the safety check of one-way conduction for this reason, and fluid is along the direction flowing of design in advance, if reverse fluid flow, can closure of check ring be caused, thus realize one-directional fluid flow.If traditional safety check has impurity or self wearing and tearing on flap, easy inefficacy, and be fixedly connected with owing to adopting, can only upgrade by whole valve after impaired, cause the wasting of resources, and traditional safety check all can not effectively prevent press water to main, backflow phenomenon occurring from arm reflux, especially in the water supply network of Drinking Water, there is backflow pollution and serious harm is brought to the healthy of people.
Model utility content
Technical problem to be solved in the utility model is the present situation for prior art, provides a kind of secondary check valve that a kind of simple and reasonable, easy assembling is produced.
The technological scheme that the utility model solves the problems of the technologies described above and adopts is: a kind of secondary check valve, comprise valve body, check valve assembly, circlip, pad, bolt, O type circle, snap ring and cutting ferrule, installation cavity is formed in valve body, described check valve assembly, circlip, pad are installed in the installation cavity of described valve body, described check valve assembly has two, the two ends of valve body are provided with snap ring and cutting ferrule, it is characterized in that: sealed by O type circle between check valve assembly and valve body.
As improvement, described check valve assembly includes valve seat, seal ring, fixed base, flap, spring, described seal ring is arranged between valve seat and fixed base, the inner side of described valve seat forms annular groove, the annular convex ring matched with annular groove is formed at fixed base cylindrical, enable described valve seat and fixed base carry out clamping to be connected, described spring is arranged between flap and valve seat, makes flap and seal ring keep the trend sealed.
As improvement, be provided with circlip and pad between described two check valve assemblies, two check valve assemblies are separated, prevent two check valve assemblies from operationally interfering with each other.
As improvement, described fixed base is provided with splayed configuration card base, described valve body is provided with groove, in the groove that card base can be fixed on valve body, prevent from producing between described check valve assembly and described valve body moving axially.
As improvement, described flap adopts engineering plastics to be that raw material is made, and described seal ring adopts robber materials to make.
As improvement, on described valve body in the middle of two check valve assemblies, be provided with pressure gauge mounting hole, can setting pressure table or differential pressure indicator by mounting hole, pressure loss during valve open can be detected, or judge whether safety check lost efficacy, and pressure gauge mounting hole is provided with bolt, by the sealing of O type circle between bolt and valve body.
Compared with prior art, the utility model has the advantage of: two check valve assemblies are connected in installation cavity successively, make it simple and reasonable, be more prone to assembling produce, and adopt the mode of series connection, can more effectively prevent downstream water from flowing backwards reliably, flap adopts engineering plastics to be raw material, make it easy to process, lightweight, and effectively reduce cost of production, seal ring adopts rubber to be raw material, make it can fit with flap is more effective, sealing, valve body is provided with pressure gauge attachment hole, can setting pressure table or differential pressure indicator by mounting hole, pressure loss during valve open can be detected, or judge whether safety check lost efficacy.
Accompanying drawing explanation
Fig. 1 is the structure sectional view of valve-closed state of the present utility model.
Fig. 2 is the structural representation of valve opening state of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
If figure is a kind of secondary check valve, comprise valve body 1, two check valve assemblies 2, circlip 3, pad 4, bolt 6, O type circle 9, snap ring 7 and cutting ferrule 8, installation cavity is formed in described valve body, described check valve assembly 2, circlip 3, pad 4 are installed in the installation cavity of described valve body 1, the two ends of described valve body 1 are provided with snap ring 7 and cutting ferrule 8, it is characterized in that: sealed by O type circle 5 between described check valve assembly 2 and valve body 1.
As improvement, described check valve assembly 2 comprises valve seat 21, seal ring 22, fixed base 23, flap 24, spring 25, described seal ring 22 is arranged between valve seat 21 and fixed base 23, the inner side of described valve seat 21 forms annular groove 211, fixed base 23 forms the annular convex ring 231 matched with annular groove 211, make described valve seat 21 and fixed base 23 can carry out clamping to be connected, described spring 25 is arranged between flap 24 and fixed base 23, makes flap 24 and seal ring 22 keep the trend sealed.Be provided with circlip 3 and pad 4 between described two check valve assemblies, two check valve assemblies are separated, prevent two check valve assemblies from operationally interfering with each other.Described fixed base 23 is provided with splayed configuration card base 232, described valve body 1 is provided with groove 11, in the groove 11 that card base 232 can be fixed on valve body 1, prevent from producing between described check valve assembly 2 and described valve body 1 moving axially.Described flap 24 adopts engineering plastics to be that raw material is made, and described seal ring 22 adopts robber materials to make.On described valve body 1 in the middle of two check valve assemblies, be provided with pressure gauge mounting hole 12, can setting pressure table or differential pressure indicator by mounting hole 12, pressure loss during valve open can be detected, or judge whether safety check lost efficacy, pressure gauge mounting hole 12 is provided with bolt 6, is sealed by O type circle 9 between bolt 6 and valve body 1.
Under normal circumstances, under spring force, flap 24 and seal ring 22 close contact, valve is in closed condition.When valve inlet place has medium to input, the pressure of inlet overcomes the spring force on two check valve assemblies, valve open, pipeline internal medium proper flow.When valve inlet pressure drop, and when pressure is less than spring force or downstream pressure, under the effect of spring force or back pressure, valve closing.
Valve of the present utility model is specially adapted to the nonpotable water such as hospital, laboratory the occasion preventing aqueous reflux requirement.
Claims (6)
1. a secondary check valve, comprise valve body, check valve assembly, circlip, pad, bolt, O type circle, snap ring and cutting ferrule, installation cavity is formed in valve body, described check valve assembly, circlip, pad are installed in the installation cavity of described valve body, the two ends of valve body are provided with snap ring and cutting ferrule, it is characterized in that: sealed by O type circle between check valve assembly and valve body.
2. a kind of secondary check valve according to claim 1, it is characterized in that, described check valve assembly includes valve seat, seal ring, fixed base, flap, spring, described seal ring is arranged between valve seat and fixed base, the inner side of described valve seat forms annular groove, and fixed base forms the annular convex ring matched with annular groove, enables described valve seat and fixed base carry out clamping and is connected, described spring is arranged between flap and valve seat, makes flap and seal ring keep the trend sealed; Described fixed base is provided with splayed configuration card base.
3. a kind of secondary check valve according to claim 1, is characterized in that, is provided with circlip and pad, is separated by two check valve assemblies between described two check valve assemblies, prevents two check valve assemblies from operationally interfering with each other.
4. a kind of secondary check valve according to claim 1 and 2, described valve body is provided with groove, splayed configuration card base on described check valve assembly fixed base can be fixed in the groove on valve body, prevent from producing between described check valve assembly and described valve body moving axially.
5. a kind of secondary check valve according to claim 2, described flap adopts engineering plastics to be that raw material is made, and described seal ring adopts robber materials to make.
6. a kind of secondary check valve according to claim 1, on described valve body in the middle of two check valve assemblies, be provided with pressure gauge mounting hole, can setting pressure table or differential pressure indicator by mounting hole, pressure loss during valve open can be detected, or judge whether safety check lost efficacy, and pressure gauge mounting hole is provided with bolt, by the sealing of O type circle between bolt and valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520045554.3U CN204533670U (en) | 2015-01-21 | 2015-01-21 | A kind of secondary check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520045554.3U CN204533670U (en) | 2015-01-21 | 2015-01-21 | A kind of secondary check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204533670U true CN204533670U (en) | 2015-08-05 |
Family
ID=53747678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520045554.3U Expired - Fee Related CN204533670U (en) | 2015-01-21 | 2015-01-21 | A kind of secondary check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204533670U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927767A (en) * | 2016-07-28 | 2016-09-07 | 广东永泉阀门科技有限公司 | Novel low-resistance backflow preventer |
| CN108452434A (en) * | 2018-05-24 | 2018-08-28 | 深圳市迈威生物科技有限公司 | Multiple unidirectional sealing joint and piping installation |
| CN110206909A (en) * | 2019-06-10 | 2019-09-06 | 宁波华平智控科技股份有限公司 | Double non-returns rinse ball valve |
-
2015
- 2015-01-21 CN CN201520045554.3U patent/CN204533670U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927767A (en) * | 2016-07-28 | 2016-09-07 | 广东永泉阀门科技有限公司 | Novel low-resistance backflow preventer |
| CN108452434A (en) * | 2018-05-24 | 2018-08-28 | 深圳市迈威生物科技有限公司 | Multiple unidirectional sealing joint and piping installation |
| CN108452434B (en) * | 2018-05-24 | 2024-01-09 | 深圳市迈威生物科技有限公司 | Multiple unidirectional airtight joint and pipeline device |
| CN110206909A (en) * | 2019-06-10 | 2019-09-06 | 宁波华平智控科技股份有限公司 | Double non-returns rinse ball valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 Termination date: 20160121 |
|
| EXPY | Termination of patent right or utility model |