CN201651452U - Two-stage check valve - Google Patents
Two-stage check valve Download PDFInfo
- Publication number
- CN201651452U CN201651452U CN2010201756526U CN201020175652U CN201651452U CN 201651452 U CN201651452 U CN 201651452U CN 2010201756526 U CN2010201756526 U CN 2010201756526U CN 201020175652 U CN201020175652 U CN 201020175652U CN 201651452 U CN201651452 U CN 201651452U
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- CN
- China
- Prior art keywords
- safety check
- valve
- valve body
- joint
- valve seat
- 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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Abstract
The utility model discloses a two-stage check valve, comprising a valve body and a joint, wherein the valve body is internally formed with an installing cavity which is internally provided with a one-stage check valve and the two-stage check valve in sequence; and a port of the valve body is connected with the joint. The two-stage check valve is characterized in that the one-stage check valve and the two-stage check valve are of a serial connection structure, thus having simple and reasonable structure, being more easy to production and assembly, and being capable of more effectively and reliably prevent the backflow of downstream water by adopting a mode of serial connection..
Description
Technical field
The utility model relates to a kind of secondary safety check.
Background technique
If traditional safety check has impurity or self wearing and tearing on flap, lost efficacy easily, and owing to adopt fixedly connected, can only put in order valve after impaired upgrades, cause the wasting of resources, and traditional safety check can not prevent effectively that all press water from flowing to main and backflow phenomenon takes place from arm is counter, especially in the water supply network of Drinking Water, backflow pollution takes place the healthy of people brought serious harm, if just may there be the unsafe hidden danger of feed flow in flow.Therefore the patent No. having occurred is 200420076344.2 1 kinds of antifouling isolating valves, comprises the sealing control chamber that valve body, safety check, drain valve, sluicing valve gap and sluicing valve body are formed; Diaphragm is separated into this control chamber and independently controls epicoele and independently control cavity of resorption, is provided with first order safety check and second level safety check in its valve body; On the sluicing valve body, be provided with spilled water hole; The entrance point of described first order safety check is through the control epicoele UNICOM of pipeline and drain valve, and it exports and the import while of second level safety check and the control cavity of resorption UNICOM of drain valve; The sluicing flap is fixedlyed connected with the lower end of central shaft, fixedlys connected with diaphragm in the upper end of central shaft; Spilled water hole on the sluicing valve body makes it safe and reliable through pipeline and draining trench UNICOM, even the two-stage check valve seal lost efficacy simultaneously, also can effectively prevent the arm aqueous reflux.The defective of its existence is a complex structure, is not easy production and assembly, and the diaphragm difficulty of processing is also big, and technology is difficult to be grasped, and need further make improvements.
The model utility content
Technical problem to be solved in the utility model is the present situation at prior art, the secondary safety check that provides a kind of simple and reasonable, easy assembling to produce.
The utility model solves the problems of the technologies described above and the technological scheme that adopts is: a kind of secondary safety check, comprise valve body and joint, in valve body, be formed with installation cavity, one-level safety check and secondary safety check are housed in the described installation cavity successively, the port of valve body is connected with joint, it is characterized in that: one-level safety check and secondary safety check are cascaded structure.
As improvement, described one-level safety check is identical with the secondary check valve structure, this one-level safety check and secondary safety check have included valve seat, and the valve seat center is provided with connecting rod, have water outlet on the valve seat circumference, peg graft on the described connecting rod and be fixed with spool, have fixed groove on the spool, install in fixed groove and be provided with flap, this flap and valve port carry out fitted seal, support has spring between described spool and the valve seat, makes spool and valve port keep the trend of sealing.
As improvement, described valve port is arranged on the valve pocket, and this valve pocket is connected with the valve seat clamping.
As improvement, it is that raw material is made that described valve seat adopts engineering plastics, and described flap adopts robber materials to make.
As improvement, be provided with seal ring between described joint and the valve body, this joint and valve body are connected and fixed by nut.
Compared with prior art, advantage of the present utility model is: one-level safety check and secondary safety check are connected in the installation cavity successively, make it simple and reasonable, being more prone to assembling produces, and adopt the mode of connecting, and can prevent more effectively reliably that downstream water from flowing backwards, it is raw material that valve seat adopts engineering plastics, make it easy to process, in light weight, and effectively reduced cost of production, it is raw material that flap adopts rubber, it can be fitted, sealing with valve port is more effective.
Description of drawings
Fig. 1 is a structure sectional view of the present utility model.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
A kind of as described in Figure 1 secondary safety check, comprise valve body 1 and joint 2, between the port of valve body 1 and joint 2, be provided with seal ring 3, described valve body 1 port is fixedlyed connected by nut 4 with joint 2, be exactly that nut 4 is enclosed within on the joint 2, be connected with valve body 1 port by being threaded, make in the valve body 1 and be formed with installation cavity, install successively in the described installation cavity and be in series with one-level safety check 5 and secondary safety check 6, this one-level safety check 5 is identical with the structure of secondary safety check 6, described one-level safety check 5 and secondary safety check 6 have included valve seat 7, it is that raw material is made that this valve seat 7 adopts engineering plastics, make it easy to process, on the circumferential surface of valve seat 7, have water outlet 8, described valve seat 7 centers also are provided with connecting rod 9, one spool 10 is arranged, the middle part of this spool 10 has the slot 11 of pegging graft and fixing for connecting rod 9, also support has spring 12 between spool 10 and valve seat 7, make spool 10 and valve port 13 remain the trend of sealing, on spool 10, also have fixed groove 14, in fixed groove 14, install and be provided with flap 15, it is raw material that this flap 15 adopts rubber, described flap 15 closely cooperates with valve port 13, this valve port 13 is arranged on the valve pocket 16, the outside of described valve pocket 16 forms annular groove 17, on valve seat 7, form the annular convex ring 18 that matches with annular groove 17, make valve pocket 16 and valve seat 7 can carry out clamping and link to each other, between the valve seat 7 on valve pocket on the secondary safety check 6 16 and the one-level safety check 5, also be provided with seal ring 19, effectively raise its sealability.
Generally, under the effect of spring force, flap 15 closely contacts with valve port 13 on the valve pocket 16, and valve is in closed condition.When there was the medium input at joint 2 places, the pressure at joint 2 places overcame the spring force on one-level safety check 5 and the secondary safety check 6, opens flap 15, the pipeline internal medium proper flow.When joint 2 places pressure descend, and pressure is during less than spring force or downstream pressure, under the effect of spring force or back pressure, and valve closing.
Valve of the present utility model is specially adapted to nonpotable water such as hospital, laboratory the occasion that prevents the aqueous reflux requirement.
Claims (4)
1. secondary safety check, comprise valve body and joint, in valve body, be formed with installation cavity, one-level safety check and secondary safety check are housed in the described installation cavity successively, the port of valve body is connected with joint, it is characterized in that: one-level safety check and secondary safety check are cascaded structure.
2. secondary safety check according to claim 1, it is characterized in that: described one-level safety check is identical with the secondary check valve structure, this one-level safety check and secondary safety check have included valve seat, have water outlet on the valve seat circumferential surface, the valve seat center is provided with connecting rod, and pegging graft on the described connecting rod is fixed with spool, support has spring between this spool and the valve seat, have fixed groove on the described spool, install in fixed groove and be provided with flap, this flap and valve port carry out fitted seal.
3. secondary safety check according to claim 2 is characterized in that: described valve port is arranged on the valve pocket, and this valve pocket is connected with the valve seat clamping.
4. according to the described secondary safety check of any claim of claim 1～3, it is characterized in that: be provided with seal ring between described joint and the valve body, this joint and valve body are connected and fixed by nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201756526U CN201651452U (en) | 2010-04-27 | 2010-04-27 | Two-stage check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201756526U CN201651452U (en) | 2010-04-27 | 2010-04-27 | Two-stage check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201651452U true CN201651452U (en) | 2010-11-24 |
Family
ID=43116689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201756526U Expired - Fee Related CN201651452U (en) | 2010-04-27 | 2010-04-27 | Two-stage check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201651452U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016798A (en) * | 2012-12-08 | 2013-04-03 | 中国航天科技集团公司第六研究院第十一研究所 | Double-spool series high-pressure redundant sealing check valve |
| CN104728476A (en) * | 2015-03-23 | 2015-06-24 | 中国石油大学(北京) | One-way valve |
| CN106051232A (en) * | 2016-07-12 | 2016-10-26 | 上海空间推进研究所 | One-way valve applicable to large-flow working range and working method thereof |
| CN108413083A (en) * | 2018-04-13 | 2018-08-17 | 中煤科工集团重庆研究院有限公司 | A kind of double protection check valves |
| CN109114226A (en) * | 2018-09-10 | 2019-01-01 | 杭州蓝捷氢能科技有限公司 | A kind of liquid hydrogen storage tank Explosion-proof valve |
-
2010
- 2010-04-27 CN CN2010201756526U patent/CN201651452U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016798A (en) * | 2012-12-08 | 2013-04-03 | 中国航天科技集团公司第六研究院第十一研究所 | Double-spool series high-pressure redundant sealing check valve |
| CN104728476A (en) * | 2015-03-23 | 2015-06-24 | 中国石油大学(北京) | One-way valve |
| CN106051232A (en) * | 2016-07-12 | 2016-10-26 | 上海空间推进研究所 | One-way valve applicable to large-flow working range and working method thereof |
| CN108413083A (en) * | 2018-04-13 | 2018-08-17 | 中煤科工集团重庆研究院有限公司 | A kind of double protection check valves |
| CN109114226A (en) * | 2018-09-10 | 2019-01-01 | 杭州蓝捷氢能科技有限公司 | A kind of liquid hydrogen storage tank Explosion-proof 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20170427 |