CN105090568A - Backflow preventer - Google Patents
Backflow preventer Download PDFInfo
- Publication number
- CN105090568A CN105090568A CN201510245677.6A CN201510245677A CN105090568A CN 105090568 A CN105090568 A CN 105090568A CN 201510245677 A CN201510245677 A CN 201510245677A CN 105090568 A CN105090568 A CN 105090568A
- Authority
- CN
- China
- Prior art keywords
- spool
- backflow preventer
- pusher
- supporting frame
- valve core
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000010865 sewage Substances 0.000 abstract description 12
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 26
- 230000000694 effects Effects 0.000 description 9
- 238000004140 cleaning Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000003319 supportive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The invention provides a backflow preventer and belongs to the technical field of valves. According to the backflow preventer, the problem of backflow of sewage in the prior art is solved. The backflow preventer comprises a valve body and a valve core and is characterized in that the edge of the valve core is connected to a water inlet of the backflow preventer through reset springs; a valve core pushing unit is arranged on the rear portion of the valve core and is formed by connecting one end of a tube with a bag; the tube of the valve core pushing unit is arranged on a supporting frame capable of enabling the tube to slide freely in the axial direction and is provided with a limiting body capable of preventing the tube from sliding off the supporting frame completely. The backflow preventer is simple in structure, low in cost and is beneficial to stopping flow of backflow sewage as clean water flows backwards under the counter reaction of the valve core.
Description
Technical field
The invention belongs to valve technology field, particularly a kind of valve preventing aqueous reflux.
Background technique
Backflow preventer is applied in water supply equipment, especially the backflow of Drinking Water pipeline is seriously polluted, again without when effectively preventing backflow pollution device, development a kind of limits water in pipeline can only the waterpower control combination device of one-way flow, its function is under any operating mode, prevent ducted medium from flowing backwards, and avoids to reach the object polluted that flows backwards.
Owing to there is this problem, through retrieval, find that the basic structure of existing backflow preventer is that two safety check and eduction valve are formed, when aqueous reflux, water is applied on the spool of safety check, make valve core reset close port, but support to some extent to make spool, spool rear portion is provided with shaft, due to the existence of shaft, the area that water is acted on spool has diminished, in addition, shaft is positioned at the middle part of spool, and current in the middle part of pipeline are faster than the water velocity of close wall, these current making spool effectively not utilize flow velocity fast, thus spool can not be closed fast.Although existing backflow preventer adopts two check valve structures, because the action of check valve is closed by the fluid matasomatism flow backwards, and the fluid flowed back to comes from backflow preventer sewage below, pollutes so easily cause to flow backwards.
Summary of the invention
The object of the invention is to there are the problems referred to above for existing technology, propose a kind of backflow preventer, this backflow preventer increase the active area of refluence body on valve block and the current made full use of in the middle part of pipeline to spool effect, and when generation is flow backwards, the brief period that spool is closed, the fluid flowing to spool from sewage end is the clean fluid identical with valve body front.
Object of the present invention realizes by following technical proposal: a kind of backflow preventer, comprise valve body, and the spool of control valve conducting or cut-off, described spool edge is connected to the water inlet of backflow preventer by Returnning spring, described spool rear portion is provided with spool pusher, and spool pusher can make valve close by pushing tow spool under the effect of refluence water.Described spool pusher connects utricule by body one end and forms, water can be passed through body and enters utricule, and utricule is that flexible material is made, and the body of described spool pusher is arranged on and can makes on the axial supporting frame be free to slide of body, support should be provided with space, pass through to make fluid.Supporting frame plays a supportive role to body and limits the displacement distance of body, and the body of described spool pusher is provided with and prevents body to slip away completely the limit body of support frame as described above, body can only move certain distance forward or backward, can not depart from supporting frame.
The working principle of this backflow preventer is such, when the inlet pressure of backflow preventer is greater than outlet pressure, valve block backs down by fluid, fluid enters valve body, in the body that the fluid entering valve body enters spool pusher and utricule, fluid can flow to backflow preventer outlet side via the gap of the space on supporting frame and utricule and valve body.When the inlet pressure of backflow preventer is less than outlet pressure, the pressure at utricule place place is greater than the pressure at valve core place place, fluid in utricule flows out from body port and acts on spool under the effect of pressure reduction, spool is closed, due to the cleaning fluid that the fluid in utricule and body advances into for it, so can effectively prevent entering of sewage in valve body close stage.In addition, act on the fluid on spool flow backward under the reaction of spool also can stop from body wall flow backwards return sewage.Moving forward in the effect lower valve core pusher entirety of pressure reduction withstands on spool, increases the closing force of spool.
In above-mentioned backflow preventer, the body end that described spool pusher connects utricule is bell mouth shape.Bell mouth shape may is in the support to utricule.
In above-mentioned backflow preventer, described tube support frame is the disk with porous be fixed on valve body, and described body is through the middle part of disk.
In above-mentioned backflow preventer, described spool is circular cone hat.Circular cone hat is conducive to acting on the close of the fluid from flowing backward prevention sewage from the outflow of spool pusher thereon.
In above-mentioned backflow preventer, the limit body on described body is the annular retaining ring be fixed between spool and supporting frame on body.
In above-mentioned backflow preventer, the end sidewalls of the body pushing tow spool of described spool pusher there is hole.Hole in body end sidewalls contributes to when behind body top to spool, and fluid also can flow out swimmingly.
Compared with prior art, this backflow preventer has the following advantages:
1, the present invention is by arranging the cystidium of prestor clean water at spool rear, when generation pressure reduction can be made to change, the water be applied on spool is the clean water be stored in advance in cystidium, and clean water flows backward and contributes to damming to refluence sewage under the outbreak of spool is used simultaneously.
2, backflow preventer of the present invention, the water of refluence acts on the whole area of spool, and action effect is sensitiveer.
3, structure of the present invention is simple, and easy to operate, cost is low, can effectively prevent sewage from flowing backwards.
Accompanying drawing explanation
Fig. 1 is the working state sectional drawing that backflow preventer of the present invention does not occur when flowing backwards;
Fig. 2 is the working state sectional drawing that backflow preventer of the present invention occurs when flowing backwards;
Fig. 3 is discoid supporting frame schematic diagram of the present invention.
In figure, 1, valve body; 2, spool; 3, Returnning spring; 4, body; 5, utricule; 6, back-up ring; 7, supporting frame; 8, water intake; 9, water outlet.
Embodiment
Be below specific embodiments of the invention and by reference to the accompanying drawings, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.
As shown in Figures 1 and 2, a kind of backflow preventer, comprises valve body 1, the spool 2 of control valve conducting or cut-off, and described spool edge is connected to the water inlet of backflow preventer by Returnning spring 3, and the spool of the present embodiment is circular cone hat.The fluid from flowing backward flowed out from spool pusher that circular cone hat is conducive to acting on thereon stops sewage near spool.Described spool rear portion is provided with spool pusher, and spool pusher can make valve close by pushing tow spool under the effect of refluence water.Described spool pusher connects utricule 5 by body 4 one end and forms, and water can be passed through body 4 and enters utricule 5, and utricule 5 is made for flexible material.Body 4 end of the spool pusher connection utricule 5 of the present embodiment is bell mouth shape.Bell mouth shape may is in the support to utricule 5.The body of described spool pusher is arranged on and can makes, on the axial supporting frame 7 be free to slide of body, support should be provided with space, pass through to make fluid.The tube support frame 7 of the present embodiment is for being fixed on the disk with porous on valve body, and as shown in Figure 3, described body is through the middle part of disk, and disk is fixed on valve body.Supporting frame plays a supportive role to body and limits the displacement distance of body, and the body of described spool pusher is provided with and prevents body to slip away completely the limit body of support frame as described above, body can only move certain distance forward or backward, can not depart from supporting frame.Limit body on the present embodiment middle tube body is the annular retaining ring 6 be fixed between spool and supporting frame on body.When body moves backward, back-up ring is stuck in supporting frame place and prevents body from continuing to move backward.
The working principle of this backflow preventer is such, when water intake 8 pressure of backflow preventer is greater than water outlet 9 pressure, valve block backs down by fluid, fluid enters valve body, in the body that the fluid entering valve body enters spool pusher and utricule, fluid can flow to backflow preventer water outlet side via the gap of the space on supporting frame and utricule and valve body.When the water intake pressure of backflow preventer is less than water outlet pressure, the pressure at utricule place place is greater than the pressure at valve core place place, fluid in utricule flows out from body port and acts on spool under the effect of pressure reduction, spool is closed, due to the cleaning fluid that the fluid in utricule and body advances into for it, so can effectively prevent entering of sewage in valve body close stage.In addition, act on the fluid on spool flow backward under the reaction of spool also can stop from body wall flow backwards return sewage.Moving forward in the effect lower valve core pusher entirety of pressure reduction withstands on spool, increases the closing force of spool.
In order to make better effects if of the present invention, in above-mentioned backflow preventer, the end sidewalls of the body pushing tow spool of described spool pusher can arrange hole.Hole in body end sidewalls contributes to when behind body top to spool, and fluid also can flow out swimmingly.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Although more employ 1 herein, valve body; 2, spool; 3, Returnning spring; 4, body; 5, utricule; 6, back-up ring; 7, supporting frame; 8, water intake; 9, the term such as water outlet, but do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present invention more easily; The restriction that they are construed to any one additional is all contrary with spirit of the present invention.
Claims (6)
1. a backflow preventer, comprise valve body (1), spool (2), it is characterized in that, described spool (2) edge is connected to water intake (8) place of backflow preventer by Returnning spring (3), described spool (2) rear portion is provided with spool pusher, described spool pusher connects utricule (5) by body (4) one end and forms, the body (4) of described spool pusher is arranged on and can makes on its supporting frame (7) be axially free to slide, the body (4) of described spool pusher is provided with and prevents body (4) to slip away completely the limit body of support frame as described above.
2. backflow preventer according to claim 1, is characterized in that, body (4) end that described spool pusher connects utricule (5) is bell mouth shape.
3. backflow preventer according to claim 1 and 2, is characterized in that, described body (4) supporting frame (7) is for being fixed on the disk with porous on valve body (1), and described body (4) is through the middle part of disk.
4. backflow preventer according to claim 2, is characterized in that, described spool (2) is circular cone hat.
5. backflow preventer according to claim 2, is characterized in that, the limit body on described body (4) is the annular retaining ring (6) be fixed between spool and supporting frame on body.
6. backflow preventer according to claim 2, is characterized in that, the end sidewalls of body (4) the pushing tow spool of described spool pusher has hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510245677.6A CN105090568B (en) | 2015-05-15 | 2015-05-15 | backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510245677.6A CN105090568B (en) | 2015-05-15 | 2015-05-15 | backflow preventer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105090568A true CN105090568A (en) | 2015-11-25 |
| CN105090568B CN105090568B (en) | 2018-05-29 |
Family
ID=54571607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510245677.6A Active CN105090568B (en) | 2015-05-15 | 2015-05-15 | backflow preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105090568B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339439A (en) * | 2017-07-10 | 2017-11-10 | 天津英铁科技有限公司 | Anti-backflow choke taste waterpower self-control valve gear and application method |
| CN108361422A (en) * | 2018-03-16 | 2018-08-03 | 浙江理工大学 | A kind of check-valves |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4284097A (en) * | 1978-03-28 | 1981-08-18 | Amtrol Inc. | In line back flow preventer |
| GB2163532A (en) * | 1984-08-24 | 1986-02-26 | Godiva Fire Pumps Ltd | Flow control valve |
| CN2184828Y (en) * | 1994-01-15 | 1994-12-07 | 李援 | Anti-overflow device for drainage pipe block |
| CN2441877Y (en) * | 2000-06-28 | 2001-08-08 | 蒋国秀 | Water seal in drain tube |
| CN2451848Y (en) * | 2000-11-17 | 2001-10-03 | 贵州省桐梓县振业汽车配件制造有限公司 | Combined valve block one-way valve |
| CN2795589Y (en) * | 2005-05-30 | 2006-07-12 | 宝山钢铁股份有限公司 | Check valve for pollution discharge pump |
| CN201475449U (en) * | 2009-05-18 | 2010-05-19 | 青岛生物能源与过程研究所 | Pressure stabilization constant flow check valve |
| CN202674402U (en) * | 2012-07-19 | 2013-01-16 | 上海高桥水暖设备有限公司 | Safe and energy-saving type micro-resistance backflow preventing device |
-
2015
- 2015-05-15 CN CN201510245677.6A patent/CN105090568B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4284097A (en) * | 1978-03-28 | 1981-08-18 | Amtrol Inc. | In line back flow preventer |
| GB2163532A (en) * | 1984-08-24 | 1986-02-26 | Godiva Fire Pumps Ltd | Flow control valve |
| CN2184828Y (en) * | 1994-01-15 | 1994-12-07 | 李援 | Anti-overflow device for drainage pipe block |
| CN2441877Y (en) * | 2000-06-28 | 2001-08-08 | 蒋国秀 | Water seal in drain tube |
| CN2451848Y (en) * | 2000-11-17 | 2001-10-03 | 贵州省桐梓县振业汽车配件制造有限公司 | Combined valve block one-way valve |
| CN2795589Y (en) * | 2005-05-30 | 2006-07-12 | 宝山钢铁股份有限公司 | Check valve for pollution discharge pump |
| CN201475449U (en) * | 2009-05-18 | 2010-05-19 | 青岛生物能源与过程研究所 | Pressure stabilization constant flow check valve |
| CN202674402U (en) * | 2012-07-19 | 2013-01-16 | 上海高桥水暖设备有限公司 | Safe and energy-saving type micro-resistance backflow preventing device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339439A (en) * | 2017-07-10 | 2017-11-10 | 天津英铁科技有限公司 | Anti-backflow choke taste waterpower self-control valve gear and application method |
| CN107339439B (en) * | 2017-07-10 | 2024-04-16 | 天津英铁科技有限公司 | Backflow-preventing odor-blocking hydraulic self-control valve device and use method thereof |
| CN108361422A (en) * | 2018-03-16 | 2018-08-03 | 浙江理工大学 | A kind of check-valves |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105090568B (en) | 2018-05-29 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 316000 No. 127 Datong Road, Zhujiajian street, Putuo District, Zhoushan, Zhejiang Patentee after: Zhejiang Ocean University Address before: 316000 No. 127 Datong Road, Zhujiajian street, Putuo District, Zhoushan, Zhejiang Patentee before: ZHEJIANG OCEAN University |
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| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20151125 Assignee: Shengsi County Ruitong Computer Technology Co.,Ltd. Assignor: Zhejiang Ocean University Contract record no.: X2023980045989 Denomination of invention: Backflow preventer Granted publication date: 20180529 License type: Common License Record date: 20231106 |