CN208311570U - A kind of double non-return backflow preventers - Google Patents
A kind of double non-return backflow preventers Download PDFInfo
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- CN208311570U CN208311570U CN201820850188.2U CN201820850188U CN208311570U CN 208311570 U CN208311570 U CN 208311570U CN 201820850188 U CN201820850188 U CN 201820850188U CN 208311570 U CN208311570 U CN 208311570U
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- 238000007789 sealing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a kind of double non-return backflow preventers, including valve body, first anti-backflow device, second anti-backflow device, position valve seat, spring base and exhaust valve, the first anti-backflow device and the second anti-backflow device are equipped in valve body, first anti-backflow device includes main valve seat, main valve disc, main valve stem and main spring, main valve seat is equipped with main valve disc, main valve disc is connect with main valve stem, main valve stem passes through main valve disc and main valve seat, main valve stem is equipped with main spring, second anti-backflow device includes auxiliary-seat, secondary valve disc, auxiliary valve rod and auxiliary spring, auxiliary-seat is equipped with secondary valve disc, secondary valve disc is connect with auxiliary valve rod, auxiliary valve rod passes through secondary valve disc and auxiliary-seat, auxiliary valve rod is equipped with auxiliary spring, auxiliary valve rod is connect with positioning valve seat, main spring is set on spring base, exhaust valve is additionally provided on valve body.A kind of simply and effectively double non-return backflow preventers have been made by adopting the above technical scheme.Two separate valves seat valve disk designs, any valve adjustment debit is bad, does not influence another valve disc and works normally.
Description
Technical field
The utility model relates to backflow preventer field, in particular to a kind of double non-return backflow preventers.
Background technique
Backflow preventer is a kind of device for preventing feedwater piping water flow from flowing backwards using retaining element composition.It is existing
Equal backflow preventer is single backflow preventer, if be out of order, cannot entirely be worked, and single sealing
Performance non-return performance is also not high enough.
Therefore need a kind of convenient and practical, simple and effective double non-return backflow preventers.
Utility model content
To solve the above-mentioned problems, the utility model provide it is a kind of it is convenient and practical, simply and effectively double non-returns refluences prevent
Device.
The double non-return backflow preventers of one of the utility model, including valve body, the first anti-backflow device, the second anti-backflow
Device, positioning valve seat, spring base and exhaust valve, the valve body is interior to be equipped with the first anti-backflow device and the second anti-backflow device, institute
Stating the first anti-backflow device includes main valve seat, main valve disc, main valve stem and main spring, and the main valve seat is equipped with main valve disc, described
Main valve disc is connect with main valve stem, and the main valve stem passes through main valve disc and main valve seat, and the main valve stem is equipped with main spring, and described the
Two anti-backflow devices include auxiliary-seat, secondary valve disc, auxiliary valve rod and auxiliary spring, and the auxiliary-seat is equipped with secondary valve disc, the pair valve
Disk is connect with auxiliary valve rod, and the auxiliary valve rod passes through secondary valve disc and auxiliary-seat, and the auxiliary valve rod is equipped with auxiliary spring, the auxiliary valve rod
It is connect with positioning valve seat, the main spring is set on spring base, is additionally provided with exhaust valve on the valve body.
In above scheme, the first O-ring seal is equipped between positioning valve seat and the valve body.
In above scheme, the second O-ring seal is equipped between the pair valve disc and valve body.
In above scheme, third O-ring seal is equipped between the main valve seat and valve body.
In above scheme, the valve body is equipped with 3 exhaust valves.
Advantages and beneficial effects of the utility model lie in that the utility model provide it is a kind of convenient and practical, simple and effective
Double non-return backflow preventers.Two separate valves seat valve disk designs, any valve adjustment debit is bad, does not influence another valve disc and works normally；It produces
The design of product exhaust valve, effectively eliminates the gas in medium；It is spring sealed, instead of other similar products plunger designs, make product more
It is easy to be flexible.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the utility model.
In figure: 1, valve body 2, positioning valve seat 3, spring base 4, exhaust valve 5, main valve seat 6, main valve disc 7, main valve stem
8, main spring 9, auxiliary-seat 10, secondary valve disc 11, auxiliary valve rod 12, auxiliary spring 13, the first O-ring seal 14, second are O-shaped close
Seal 15, third O-ring seal
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is further described.Implement below
Example is only used for clearly illustrating the technical solution of the utility model, and cannot be used as a limitation the protection model of limitation the utility model
It encloses.
As shown in Figure 1, the utility model is a kind of double non-return backflow preventers, including valve body 1, the first anti-backflow device,
Second anti-backflow device, positioning valve seat 2, spring base 3 and exhaust valve 4, valve body 1 are interior anti-down equipped with the first anti-backflow device and second
Device is flowed, the first anti-backflow device includes main valve seat 5, main valve disc 6, main valve stem 7 and main spring 8, and main valve seat 5 is equipped with main valve disc
6, main valve disc 6 is connect with main valve stem 7, main valve stem 7 pass through main valve disc 6 and main valve seat 5, main valve stem 7 be equipped with main spring 8, second
Anti-backflow device includes auxiliary-seat 9, secondary valve disc 10, auxiliary valve rod 11 and auxiliary spring 12, and auxiliary-seat 9 is equipped with secondary valve disc 10, secondary valve
Disk 10 is connect with auxiliary valve rod 11, and auxiliary valve rod 11 passes through secondary valve disc 10 and auxiliary-seat 9, and auxiliary valve rod 11 is equipped with auxiliary spring 12, secondary valve
Bar 11 is connect with positioning valve seat 2, and main spring 8 is set on spring base 3, and exhaust valve 4 is additionally provided on valve body 1.
It positions and is equipped with the first O-ring seal 13 between valve seat and valve body, the second O-shaped sealing is equipped between secondary valve disc and valve body
Circle 14 is equipped with third O-ring seal 15 between main valve seat and valve body.
Valve body 1 is equipped with 3 exhaust valves 4.
Medium enters from right side, flows out by the first anti-backflow device, the second anti-backflow device from left side, due to main valve seat
5, the double sealing of auxiliary-seat 9, medium cannot return to right side from left side.Due to there is two sets of anti-backflow devices, if one of them
Damage, another can also be worked normally, and two sets of anti-backflow devices can be sealed closely.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (5)
1. a kind of double non-return backflow preventers, which is characterized in that including valve body, the first anti-backflow device, the second anti-backflow device,
Valve seat, spring base and exhaust valve are positioned, is equipped with the first anti-backflow device and the second anti-backflow device in the valve body, described first
Anti-backflow device includes main valve seat, main valve disc, main valve stem and main spring, and the main valve seat is equipped with main valve disc, the main valve disc
It is connect with main valve stem, the main valve stem passes through main valve disc and main valve seat, and the main valve stem is equipped with main spring, and described second is anti-down
Stream device includes auxiliary-seat, pair valve disc, auxiliary valve rod and auxiliary spring, and the auxiliary-seat is equipped with secondary valve disc, the pair valve disc and pair
Valve rod connection, the auxiliary valve rod pass through secondary valve disc and auxiliary-seat, and the auxiliary valve rod is equipped with auxiliary spring, the auxiliary valve rod and positioning
Valve seat connection, the main spring are set on spring base, are additionally provided with exhaust valve on the valve body.
2. a kind of double non-return backflow preventers according to claim 1, which is characterized in that the positioning valve seat and valve body it
Between be equipped with the first O-ring seal.
3. a kind of double non-return backflow preventers according to claim 1, which is characterized in that between the pair valve disc and valve body
Equipped with the second O-ring seal.
4. a kind of double non-return backflow preventers according to claim 1, which is characterized in that between the main valve seat and valve body
Equipped with third O-ring seal.
5. a kind of double non-return backflow preventers according to claim 1, which is characterized in that the valve body is equipped with 3 rows
Air valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820850188.2U CN208311570U (en) | 2018-06-04 | 2018-06-04 | A kind of double non-return backflow preventers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820850188.2U CN208311570U (en) | 2018-06-04 | 2018-06-04 | A kind of double non-return backflow preventers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208311570U true CN208311570U (en) | 2019-01-01 |
Family
ID=64709394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820850188.2U Active CN208311570U (en) | 2018-06-04 | 2018-06-04 | A kind of double non-return backflow preventers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208311570U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114893591A (en) * | 2022-06-21 | 2022-08-12 | 天津市国威给排水设备制造有限公司 | Backflow preventer with exhaust function |
| CN121273933A (en) * | 2025-12-09 | 2026-01-06 | 福建省真特阀门科技有限公司 | Double-valve-clack check valve |
-
2018
- 2018-06-04 CN CN201820850188.2U patent/CN208311570U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114893591A (en) * | 2022-06-21 | 2022-08-12 | 天津市国威给排水设备制造有限公司 | Backflow preventer with exhaust function |
| CN121273933A (en) * | 2025-12-09 | 2026-01-06 | 福建省真特阀门科技有限公司 | Double-valve-clack check valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200727 Address after: 201505 workshop 2, No. 5369 Nanting Road, Tinglin Town, Jinshan District, Shanghai Patentee after: Pulian power fluid control (Shanghai) Co., Ltd Address before: 215399 Room 1111, North Chengdu Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee before: SUZHOU PULIAN POWER INTELLIGENT FLUID CONTROL Co.,Ltd. |