CN205715844U - A kind of making-up air device of backflow preventer - Google Patents
A kind of making-up air device of backflow preventer Download PDFInfo
- Publication number
- CN205715844U CN205715844U CN201620664846.XU CN201620664846U CN205715844U CN 205715844 U CN205715844 U CN 205715844U CN 201620664846 U CN201620664846 U CN 201620664846U CN 205715844 U CN205715844 U CN 205715844U
- Authority
- CN
- China
- Prior art keywords
- making
- backflow preventer
- adapter sleeve
- air device
- guide part
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Check Valves (AREA)
Abstract
The utility model discloses the making-up air device of a kind of backflow preventer, relate to making-up air device technical field.This making-up air device includes adapter sleeve, described adapter sleeve one end is connected with the intermediate cavity of backflow preventer, the other end is provided with the passage with atmosphere, is provided with the sealing member along passage axially reciprocating in described adapter sleeve, and described sealing member is for controlling the opening and closing of passage.The making-up air device of the backflow preventer that the utility model proposes, the movement of sealing member can control the break-make of passage, when backflow preventer intermediate cavity pressure declines or reaches negative pressure, needing air to fill into, by suction function, sealing member moves to intermediate cavity direction, passage is connected with intermediate cavity by adapter sleeve, sealing member can be formed air partition in time for filling into air in backflow preventer intermediate cavity, prevent from flowing backwards.
Description
Technical field
This utility model relates to making-up air device technical field, particularly relates to the making-up air device of a kind of backflow preventer.
Background technology
Main Function in backflow preventer is to ensure that pipeline internal medium one-way flow, prevents back pressure backflow and siphon from returning
Stream, wherein back pressure backflow is the backflow that outlet pressure raises and outlet non-return valve seepage produces, and siphon backflow is under inlet pressure
The backflow that fall causes.When backflow occurs, backflow preventer drain valve is opened, by part or all of for intermediate cavity press water dump valve
External.After the two-stage closure of check ring of backflow preventer, intermediate cavity forms an airtight cavity, when middle cavity pressure is reduced to greatly
During air pressure, the aquiform stool of intracavity is difficult to discharge or discharge slowly, is difficult to quickly form air partition in backflow preventer intermediate cavity, this
Shi Bixu has gas to fill into can form air partition by medium in rapid deflation intermediate cavity.Backflow preventer intermediate cavity air at present
Fill into device arrange unreasonable or be not provided with air at all and fill into passage, cause backflow preventer to be difficult to play it due excellent
Gesture.
Utility model content
The purpose of this utility model is to propose the making-up air device of a kind of backflow preventer, it is possible to ensure the rapid shape of intermediate cavity
Become air partition, prevent from flowing backwards.
For reaching this purpose, this utility model by the following technical solutions:
The making-up air device of a kind of backflow preventer, including the centre of adapter sleeve, described adapter sleeve one end and backflow preventer
Chamber connects, and the other end is provided with the passage with atmosphere, is provided with transporting along passage axial reciprocating in described adapter sleeve
Dynamic sealing member, described sealing member is for controlling the opening and closing of passage.
As a kind of preferred version of the making-up air device of above-mentioned backflow preventer, described sealing member connects guider, institute
Stating guider to include sealing valve plate, described sealing member is fixed on described sealing valve plate, and described sealing valve plate at least side sets
Being equipped with along the axial guide part of adapter sleeve, described guide part is located in pilot hole.
As a kind of preferred version of the making-up air device of above-mentioned backflow preventer, described sealing valve plate both sides are respectively arranged with
First guide part and the second guide part, be provided with the fairlead coordinated with described first guide part in described adapter sleeve, and described
Pilot hole corresponding to one guide part and the second guide part is respectively on fairlead the interstitial hole and described passage arranged.
As a kind of preferred version of the making-up air device of above-mentioned backflow preventer, described fairlead arranges external screw thread, institute
Stating and arrange female thread on adapter sleeve, described fairlead is threadeded with described adapter sleeve.
As a kind of preferred version of the making-up air device of above-mentioned backflow preventer, described fairlead is bolt, described bolt
And form breach between adapter sleeve inwall.
As a kind of preferred version of the making-up air device of above-mentioned backflow preventer, described first guide part and described interstitial hole
Between be matched in clearance.
As a kind of preferred version of the making-up air device of above-mentioned backflow preventer, the outer wall of described second guide part is arranged
There is at least one groove.
As a kind of preferred version of the making-up air device of above-mentioned backflow preventer, described adapter sleeve is away from one end of intermediate cavity
Connect and have sealing shroud, described sealing shroud offers described passage.
As a kind of preferred version of the making-up air device of above-mentioned backflow preventer, described sealing shroud is provided with external screw thread,
Threaded with described adapter sleeve.
As a kind of preferred version of the making-up air device of above-mentioned backflow preventer, described sealing shroud is near one end of sealing member
Being provided with sealing surface, the profile of described sealing surface cooperates with described sealing member.
The beneficial effects of the utility model:
The making-up air device of backflow preventer of the present utility model, the movement of sealing member can control the break-make of passage, when
When backflow preventer intermediate cavity pressure declines or reaches negative pressure, needing air to fill into, by suction function, sealing member is to intermediate cavity
Direction is moved, and passage is connected with intermediate cavity by adapter sleeve, and sealing member can be in time for filling in backflow preventer intermediate cavity
Air, forms air partition, prevents from flowing backwards.When there being media flow in pipeline, passage is closed by the sealing member effect of being stressed.
Accompanying drawing explanation
Fig. 1 is the structural representation of the making-up air device of the backflow preventer that this utility model detailed description of the invention provides；
Fig. 2 is the structural representation sealing valve plate that this utility model detailed description of the invention provides；
Fig. 3 be in Fig. 2 A to structural representation；
Fig. 4 is the structural representation of the fairlead that this utility model detailed description of the invention provides.
Wherein, 1, adapter sleeve；2, sealing member；3, passage；4, valve plate is sealed；5, fairlead；6, sealing shroud；
41, the first guide part；42, the second guide part；43, groove；
51, interstitial hole.
Detailed description of the invention
Further illustrate the technical solution of the utility model below in conjunction with the accompanying drawings and by detailed description of the invention.
As it is shown in figure 1, present embodiment proposes the making-up air device of a kind of backflow preventer, including adapter sleeve 1, adapter sleeve 1
One end is connected with the intermediate cavity of backflow preventer, and the other end is provided with the passage 3 with atmosphere, is provided with energy in adapter sleeve 1
Enough sealing members 2 along passage 3 axially reciprocating, described sealing member 2 is for controlling the opening and closing of passage 3.
The making-up air device of this backflow preventer, the movement of sealing member 2 can control the break-make of passage 3, when refluence prevents
When device intermediate cavity pressure declines or reaches negative pressure, needing air to fill into, by suction function, sealing member 2 moves to intermediate cavity direction
Dynamic, passage 3 is connected with intermediate cavity by adapter sleeve 1, and sealing member 2 can be in time for filling into sky in backflow preventer intermediate cavity
Gas, forms air partition, prevents from flowing backwards.When there being media flow in pipeline, passage 3 is closed by sealing member 2 effect of being stressed.
Concrete, sealing member 2 connects guider, and guider includes sealing valve plate 4, and sealing member 2 is fixed on sealing valve
On plate 4, guide part seals valve plate 4 at least side and is provided with along the axial guide part of adapter sleeve 1, and guide part is located in pilot hole
In, when negative pressure in backflow preventer, sealing member 2 is by sealing the guide part connected on valve plate 4 along pilot hole to intermediate cavity side
To motion guide, due to the existence of guide part so that sealing member 2 is more stable when mobile.
Preferably, as in figure 2 it is shown, seal valve plate 4 both sides to be respectively arranged with the first guide part 41 and the second guide part 42, even
The fairlead 5 coordinated with the first guide part 41 it is provided with, leading corresponding to the first guide part 41 and the second guide part 42 in female connector 1
The interstitial hole 51 and passage 3 arranged it is respectively on fairlead 5, by the first guide part 41 and the second guide part of both sides to hole
42 are simultaneously directed to, it is ensured that sealing member 2 is to move back and forth along the axis of adapter sleeve 1, and sealing member 2 moves stable, will not occur
Skew, prevents sealing member 2 from occurring that position offsets when sealing.
Wherein, as shown in Figure 4, fairlead 5 arranges external screw thread, adapter sleeve 1 arranges female thread, fairlead 5 be connected
Overlap 1 threaded, it is possible to realize changing fairlead 5.Concrete, fairlead 5 is bolt, shape between bolt and adapter sleeve 1 inwall
Becoming breach, as in figure 2 it is shown, be provided with at least one groove 43 on the outer wall of the second guide part 42, gas can be from passage 3 warp
Cross groove 43, then entered intermediate cavity by indentation, there, it is ensured that the flowing of gas is unobstructed, it is ensured that intermediate cavity can quickly form air
Cut off.
It it is matched in clearance between first guide part 41 and interstitial hole 51, it is ensured that the accurate fit of the two.
Adapter sleeve 1 has sealing shroud 6 away from one end connection of intermediate cavity, and sealing shroud 6 offers passage 3.On sealing shroud 6
It is provided with external screw thread, threadeds with adapter sleeve 1, sealing shroud 6 can be replaced, the life-span can be extended, simultaneously can also be right
Structure at this changes flexibly, it is not necessary to for the sealing shroud 6 provided in present embodiment.
Sealing shroud 6 is provided with sealing surface near one end of sealing member 2, and the profile of sealing surface cooperates with sealing member 2 so that
Good sealing between sealing shroud 6 and sealing member 2, prevents liquid medium from flowing out.
Sealing member 2 in present embodiment can be chosen as seal gasket, is fixed on sealing valve plate 4.
When supplying water in pipeline, liquid medium can promote sealing valve plate 4 to move to the direction of sealing shroud 6, and sealing member 2 is with close
Front cover i.e. forms sealing after contacting with each other, and prevents liquid medium from flowing out, when the backflow preventer on pipeline is opened for a certain reason
When opening drain valve sluicing, intermediate cavity pressure can be rapidly decreased to atmospheric pressure, subsequently form negative pressure, now, due to suction function, seals
Sealing member 2 on valve plate 4 can leave the sealing surface on sealing shroud 6, and air enters into intermediate cavity through passage 3, breach, in centre
Chamber forms air partition, prevents from flowing backwards.
Note, above are only preferred embodiment of the present utility model.It will be appreciated by those skilled in the art that this utility model is not
It is limited to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust
With replacement without departing from protection domain of the present utility model.Therefore, although by above example, this utility model is carried out
It is described in further detail, but this utility model is not limited only to above example, conceive without departing from this utility model
In the case of, it is also possible to include other Equivalent embodiments more, and scope of the present utility model is determined by scope of the appended claims
Fixed.
Claims (10)
1. the making-up air device of a backflow preventer, it is characterised in that include adapter sleeve (1), described adapter sleeve (1) one end with fall
The intermediate cavity of stream preventer connects, and the other end is provided with the passage (3) with atmosphere, and described adapter sleeve is provided with energy in (1)
Enough sealing members (2) along passage (3) axially reciprocating, described sealing member (2) is used for controlling the opening and closing of passage (3).
The making-up air device of backflow preventer the most according to claim 1, it is characterised in that described sealing member (2) connects leads
To device, described guider includes sealing valve plate (4), and described sealing member (2) is fixed on described sealing valve plate (4), described
Sealing valve plate (4) at least side to be provided with along the axial guide part of adapter sleeve (1), described guide part is located in pilot hole.
The making-up air device of backflow preventer the most according to claim 2, it is characterised in that described sealing valve plate (4) both sides
It is respectively arranged with the first guide part (41) and the second guide part (42), is provided with in described adapter sleeve (1) and guides with described first
The fairlead (5) that portion (41) coordinates, the pilot hole corresponding to described first guide part (41) and the second guide part (42) is respectively
The upper interstitial hole (51) arranged of fairlead (5) and described passage (3).
The making-up air device of backflow preventer the most according to claim 3, it is characterised in that described fairlead (5) is upper to be arranged
External screw thread, described adapter sleeve (1) arranges female thread, and described fairlead (5) is threadeded with described adapter sleeve (1).
The making-up air device of backflow preventer the most according to claim 4, it is characterised in that described fairlead is bolt, institute
State formation breach between bolt and adapter sleeve (1) inwall.
The making-up air device of backflow preventer the most according to claim 5, it is characterised in that described first guide part (41) with
It is matched in clearance between described interstitial hole (51).
The making-up air device of backflow preventer the most according to claim 3, it is characterised in that described second guide part (42)
At least one groove (43) it is provided with on outer wall.
8. according to the making-up air device of the backflow preventer described in claim 1-7 any one, it is characterised in that described adapter sleeve
(1) one end away from intermediate cavity connects sealing shroud (6), and described sealing shroud (6) offers described passage (3).
The making-up air device of backflow preventer the most according to claim 8, it is characterised in that described sealing shroud (6) is upper to be arranged
There is external screw thread, threaded with described adapter sleeve (1).
The making-up air device of backflow preventer the most according to claim 8, it is characterised in that described sealing shroud (6) is near close
One end of sealing (2) is provided with sealing surface, and the profile of described sealing surface cooperates with described sealing member (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620664846.XU CN205715844U (en) | 2016-06-27 | 2016-06-27 | A kind of making-up air device of backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620664846.XU CN205715844U (en) | 2016-06-27 | 2016-06-27 | A kind of making-up air device of backflow preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205715844U true CN205715844U (en) | 2016-11-23 |
Family
ID=57318750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620664846.XU Withdrawn - After Issue CN205715844U (en) | 2016-06-27 | 2016-06-27 | A kind of making-up air device of backflow preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205715844U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909833A (en) * | 2016-06-27 | 2016-08-31 | 天津市国威给排水设备制造有限公司 | Air supplementing device of backflow preventer |
| CN111342365A (en) * | 2020-02-20 | 2020-06-26 | 国网山东省电力公司枣庄供电公司 | Ring main unit condensation preventing device |
-
2016
- 2016-06-27 CN CN201620664846.XU patent/CN205715844U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909833A (en) * | 2016-06-27 | 2016-08-31 | 天津市国威给排水设备制造有限公司 | Air supplementing device of backflow preventer |
| CN105909833B (en) * | 2016-06-27 | 2020-04-14 | 天津市国威给排水设备制造有限公司 | Air supplement unit of backflow preventer |
| CN111342365A (en) * | 2020-02-20 | 2020-06-26 | 国网山东省电力公司枣庄供电公司 | Ring main unit condensation preventing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102494166B (en) | Overflowing protective valve | |
| CN205715844U (en) | A kind of making-up air device of backflow preventer | |
| CN102865389B (en) | Water hammer resistant backflow preventer | |
| CN110145622A (en) | A kind of negative pressure valve and the water system with it | |
| CN210397740U (en) | Corrugated pipe stop valve with high sealing performance | |
| CN204387386U (en) | A kind of vacuum diaphragm valve of simple structure | |
| CN105864744B (en) | The device that New Low Voltage fluid is transmitted to high-pressure fluid | |
| CN203797076U (en) | Air suction valve | |
| CN105909833A (en) | Air supplementing device of backflow preventer | |
| CN204127342U (en) | The dead Y-shaped cut-off valve of the anti-wedge of ultrahigh pressure Anti-erosion | |
| CN207297901U (en) | A kind of dark valve with cut-off spool | |
| CN206875129U (en) | A kind of gas check water seal that can prevent failure | |
| CN205841123U (en) | Anti-leak electromagnetic pump | |
| CN101852309B (en) | Fluoroplastic lining single-seat plunger type balance control valve | |
| CN204114265U (en) | With the reduction valve of stop valve | |
| CN205712347U (en) | A kind of environmental protecting device preventing sewage from flowing backwards | |
| CN204372315U (en) | Corrosion resistant type packing seal structure | |
| CN102628524A (en) | Valve stem sealing device | |
| CN205136688U (en) | Low resistance backflow preventer | |
| CN203604749U (en) | Pressure compensation structure | |
| CN204175985U (en) | Be provided with the butterfly valve of hydraulic sealing structure | |
| CN203363400U (en) | Axial sealing device | |
| CN204717063U (en) | Relatively inclined disc type safety check | |
| CN204253460U (en) | A kind of interior washing unit of Double entry middle-opening pump | |
| CN206873405U (en) | A kind of gate of dovetail groove type movement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161123 Effective date of abandoning: 20200414 |