CN208237152U - A kind of backflow preventer - Google Patents
A kind of backflow preventer Download PDFInfo
- Publication number
- CN208237152U CN208237152U CN201820518198.6U CN201820518198U CN208237152U CN 208237152 U CN208237152 U CN 208237152U CN 201820518198 U CN201820518198 U CN 201820518198U CN 208237152 U CN208237152 U CN 208237152U
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- valve
- flap
- guide groove
- deck
- valve deck
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Abstract
A kind of backflow preventer, valve body, the valve deck for being equipped with hollow cavity including one, first check-valve, valve seat and second check-valve are set in valve body hollow cavity, a cone spacer is set between the hollow cavity wall of valve body and valve deck inner wall, the flap of first and second check-valves labels the soft seal pad that is nested, first and second non-return flap base portions set guiding axis, and the flap guide groove for the sliding that is nested with guiding axis is set among valve seat and valve deck.Flap, which is labeled, sets sealing ring, and uses double-channel sealing structure, reduces leakage probability.On valve seat, valve deck be arranged flap guide groove, flap guide groove use major diameter it is bigger, guarantee valve using when there is not card resistance.Deflector hole is set in valve seat, valve deck, reduces front and back pressure difference and resistance to water-flow.It is directly positioned compared to valve deck with valve seat using cone spacer fixed valve base position, valve deck volume can be reduced, reduce product cost.
Description
Technical field
The utility model relates to valve manufacture technology, especially a kind of backflow preventer.
Background technique
In water supply pipe and other Drinking Water pipelines, to prevent sewage backflow in pipeline, one kind is generally all installed
Backflow preventer, this backflow preventer be in a kind of stringent restriction conduit water flow can only one-way flow device, it is desirable that reach
Prevent the medium in pipeline from flowing backwards, under any operating condition to achieve the purpose that watering not by refluence sewage pollution.Water system
The double non-return backflow preventers used are by two check valve sets at use of double non-return backflow preventers in tap water supply system
In the process, it is primarily present the problems such as structure is complicated, and installation and assembling process are many and diverse, and resistance is big, easy leakage.
Summary of the invention
The problems such as failure being easy to produce in use for double non-return backflow preventers is more, and installation is inconvenient, at high cost, mention
A kind of structure is simple out, good airproof performance, inexpensive backflow preventer easy for installation.
The utility model solve above-mentioned technical problem design scheme be: a kind of backflow preventer, including one be equipped with it is hollow
The valve body of chamber, a valve deck set first check-valve, valve seat and second check-valve in the valve body hollow cavity, which is characterized in that described
A cone spacer is set between the hollow cavity wall of valve body and the valve deck inner wall, the flap of first and second check-valves, which is labeled, to be nested
Soft seal pad, the first and second non-returns flap base portion set guiding axis, set among the valve seat and valve deck and the guiding axis
Be nested the flap guide groove of sliding.
The flap one of the first check-valve includes flap hat one and guiding axis one.
The flap two of the second check-valve includes flap hat two and guiding axis two.
Flap guide groove one and deflector hole one are equipped among the valve deck.
Flap guide groove two and deflector hole two are equipped among the valve seat.
The flap hat and guiding axis junction are equipped with spring groove, are equipped with spring in the spring groove, the spring is another
End cap is in outside the flap guide groove.
The length of the flap guide groove one and radial ratio are 3:2-2:1, the length and radial direction of the flap guide groove two
Than for 3:2-2:1.
The valve body and the valve deck place of being spirally connected are sealed using anaerobic adhesive.
The valve inleting water mouth and valve deck water outlet are equipped with internal screw thread, the valve inleting water mouth and valve deck water outlet outer wall
Equipped with spanner position.
Due to using above-mentioned technology, the good effect for being allowed to have compared with prior art is the utility model:
Flap, which is labeled, sets sealing ring, and uses double-channel sealing structure, reduces leakage probability.It is arranged on valve seat, valve deck
Flap guide groove, flap guide groove use major diameter it is bigger, guarantee valve using when there is not card resistance.It is set in valve seat, valve deck
Deflector hole reduces front and back pressure difference and resistance to water-flow.Valve body, valve deck are sealed using anaerobic adhesive, are increased sealing reliability, are conducive to
Product batch production.It is directly positioned compared to valve deck with valve seat using cone spacer fixed valve base position, valve deck volume can be reduced, reduced
Product cost.The external screw thread that double internal screw threads and existing conventional pipeline are arranged in valve body and valve deck matches, and facilitates installation, while valve body
Water inlet and valve deck water outlet outer wall are equipped with spanner position, convenient for assembly.
Detailed description of the invention
Fig. 1 is that the utility model inversely closes schematic diagram.
Fig. 2 is the valve deck schematic diagram of the utility model.
Fig. 3 be in Fig. 2 A to cross-sectional view.
Fig. 4 is the valve seat schematic diagram of the utility model.
Fig. 5 be in Fig. 4 B to cross-sectional view.
Fig. 6 is that the utility model forward direction opens schematic diagram.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments.
Shown in Fig. 1-5, a kind of backflow preventer, including a valve body 1, the valve body 1 are equipped with hollow valve chamber 11；One valve deck
2, the valve deck 2 is spirally connected with 1 side of valve body；One valve seat 3, the valve seat 3 are connected in 11 middle part of valve chamber；Flap 1,
The flap 1 is set to the valve seat 3 close to the side of valve deck 2；Flap 25, the flap 25 are set to the another of the valve seat 3
Side；Cone spacer 6, the cone spacer 6 are set between the valve seat 3 and valve deck 2.It is compared using 6 fixed valve base position of cone spacer
Valve deck is directly positioned with valve seat, can reduce valve deck volume, reduces product cost.
The flap 1 includes flap hat 1 and guiding axis 1, and be nested gasket 43 on flap hat 1.It is described
Flap 25 includes flap hat 2 51 and guiding axis 2 52, and be nested gasket 53 on flap hat 2 51.
Flap labels the structure using annular soft seal pad, realizes the sealing means of soft or hard combination, and it is anti-to improve check-valves
The effect of leakage.
The valve deck 2 is equipped with flap guide groove 1 and diversion trench 1, and the guiding axis 1 of the flap 1 is socketed on
In the flap guide groove 1, the valve seat 3 is equipped with flap guide groove 2 31 and deflector hole 2 32, and the flap 25 is led
It is socketed in the flap guide groove 2 31 to axis 2 52.Deflector hole keeps the water flow of valve body middle chamber unobstructed, reduces pressure difference.
The flap hat 1 and one 42 junction of guiding axis are equipped with spring groove 1, the flap hat 2 51 and guiding axis
2 52 junctions are equipped with spring groove 2 54.It is equipped with spring 1 in the spring groove 1, is equipped with bullet in the spring groove 2 54
Spring 2 55.One 45 other end of spring is placed on the flap guide groove 1, and 2 55 other end of spring is placed on the valve
Valve guide groove 2 31.
The length of the length of the flap guide groove 1 and radial ratio and the flap guide groove 2 31 and radially ratio are all
It can be 3:2-2:1.Flap guide groove is set on valve seat 5 and valve deck 2, and flap guide groove uses longer draw ratio, guarantees
Valve using when there is not card resistance.
The valve body 1 and 2 place of being spirally connected of the valve deck are sealed using anaerobic adhesive.Valve body, valve deck are sealed using anaerobic adhesive, favorably
It is made in product batch.
The valve inleting water mouth 12 is equipped with the external screw thread phase of internal screw thread 7 Yu existing conventional pipeline with valve deck water outlet 23
Match, facilitates installation, the valve inleting water mouth and valve deck water outlet outer wall are equipped with spanner position, convenient for assembly.
The valve seat 3 is equipped with O-ring 33.
The utility model operational process, referring to shown in Fig. 6:
Left end arrow indicates that fluid is flowed into from water inlet, and fluid opens flap 25, and spring 2 55 is shunk, gasket 2 53 with
Valve body 1 is detached from, and fluid passes through valve chamber and deflector hole 2 32, and fluid opens flap 1, and spring 1 is shunk, gasket 1 and valve
Seat 3 is detached from, and fluid is flowed out by deflector hole 1.
Fig. 1 shows when sewage refluence, two closure of check ring states, the course of work is exactly the opposite with Fig. 6, no longer describes.
Claims (7)
1. a kind of backflow preventer, valve body, the valve deck for being equipped with hollow cavity including one set the first non-return in the valve body hollow cavity
Valve, valve seat and second check-valve, which is characterized in that set between the hollow cavity wall of valve body and the valve deck inner wall in one every
Circle, the flap of first and second check-valves label the soft seal pad that is nested, and the first and second non-returns flap base portion, which is set, leads
To axis, the flap guide groove for the sliding that is nested with the guiding axis is set among the valve seat and valve deck.
2. a kind of backflow preventer according to claim 1, it is characterized in that the flap one of the first check-valve includes valve
Valve hat one and guiding axis one；The flap two of the second check-valve includes flap hat two and guiding axis two.
3. a kind of backflow preventer according to claim 1, it is characterized in that being equipped with flap guide groove one among the valve deck
With deflector hole one；Flap guide groove two and deflector hole two are equipped among the valve seat.
4. a kind of backflow preventer according to claim 1 or 2, it is characterized in that flap hat and guiding axis junction are set
There is spring groove, is equipped with spring in the spring groove, the spring other end is placed on outside the flap guide groove.
5. a kind of backflow preventer according to claim 1 or 3, it is characterized in that the length and diameter of the flap guide groove one
To than for 3:2-2:1, the length of the flap guide groove two and radially than being 3:2-2:1.
6. a kind of backflow preventer according to claim 1, it is characterized in that the valve body and the valve deck place of being spirally connected use
Anaerobic adhesive sealing.
7. a kind of backflow preventer according to claim 1, it is characterized in that the water inlet of the valve body and the valve deck
Water outlet is equipped with internal screw thread, and the water outlet outer wall of the water inlet of the valve body and the valve deck is equipped with spanner position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820518198.6U CN208237152U (en) | 2018-04-12 | 2018-04-12 | A kind of backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820518198.6U CN208237152U (en) | 2018-04-12 | 2018-04-12 | A kind of backflow preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208237152U true CN208237152U (en) | 2018-12-14 |
Family
ID=64583919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820518198.6U Active CN208237152U (en) | 2018-04-12 | 2018-04-12 | A kind of backflow preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208237152U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094554A (en) * | 2019-04-26 | 2019-08-06 | 江苏圣泰阀门有限公司 | A kind of double-flap check valve |
| CN110131154A (en) * | 2019-05-21 | 2019-08-16 | 台州高知科技有限公司 | Double containment check valve and plunger pump equipped with the valve |
| CN110608302A (en) * | 2019-09-19 | 2019-12-24 | 浙江盾安智控科技股份有限公司 | Self-rotation control valve of waterproof meter |
| CN112128437A (en) * | 2020-09-15 | 2020-12-25 | 湖南常德牌水表制造有限公司 | External backflow prevention mechanism for high-fall installation environment water meter |
-
2018
- 2018-04-12 CN CN201820518198.6U patent/CN208237152U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094554A (en) * | 2019-04-26 | 2019-08-06 | 江苏圣泰阀门有限公司 | A kind of double-flap check valve |
| CN110094554B (en) * | 2019-04-26 | 2020-07-24 | 江苏圣泰阀门有限公司 | Double-valve-clack check valve |
| CN110131154A (en) * | 2019-05-21 | 2019-08-16 | 台州高知科技有限公司 | Double containment check valve and plunger pump equipped with the valve |
| CN110608302A (en) * | 2019-09-19 | 2019-12-24 | 浙江盾安智控科技股份有限公司 | Self-rotation control valve of waterproof meter |
| CN112128437A (en) * | 2020-09-15 | 2020-12-25 | 湖南常德牌水表制造有限公司 | External backflow prevention mechanism for high-fall installation environment water meter |
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