CN102072342A - Coaxial difference path device with double check valve clacks - Google Patents
Coaxial difference path device with double check valve clacks Download PDFInfo
- Publication number
- CN102072342A CN102072342A CN 201010572782 CN201010572782A CN102072342A CN 102072342 A CN102072342 A CN 102072342A CN 201010572782 CN201010572782 CN 201010572782 CN 201010572782 A CN201010572782 A CN 201010572782A CN 102072342 A CN102072342 A CN 102072342A
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- flap
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- movable end
- valve body
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- 238000007789 sealing Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 210000000476 body water Anatomy 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Check Valves (AREA)
Abstract
The invention relates to a coaxial difference path device with double check valve clacks. A valve clack connection shaft is composed of a first step, a second step and a third step, wherein the first step is used for connecting a movable end of a first-level valve clack; the second step is used for connecting a movable end of a second-level valve clack; the third step is used for connecting a center holder of the second-level valve clack and is positioned on the rear end of the center holder of the second-level valve clack; a return spring is arranged between the rear end of the center holder of the second-level valve clack and the center holder of the second-level valve clack; and the third step is located at the front end of the center holder of the second-level valve clack and is provided with a shaft section which is favourable for the center holder of the second-level valve clack to operate to the movable end of the second-level valve clack when the check valve is sealed and closed. The device effectively solves the problem that the other valve clack is prevented from sealing when one valve clack is blocked, and greatly improves the reliability of obstructing and sealing of the check valve.
Description
Technical field
The present invention relates to a kind of valve, the coaxial double check valve lobe of particularly a kind of reliable sealing difference range device.
Background technique
In the backflow preventer main valve, adopt coaxial double non-return mechanism, reach double seal, improve the sealing reliability of backflow preventer greatly, and can use flexure spring, reduce the pressure loss of main valve; Because of the first order flap of main valve is coaxial control with partial flap, there is certain relevance, be the sealing that one of them flap jam can have influence on the another one flap, therefore can influence backflow preventer main valve sealability and backflow preventer and cut off Security.
Summary of the invention
The object of the present invention is to provide a kind of coaxial double check valve lobe difference range device, this device efficiently solves the problem that a flap jam influences another flap sealing, has improved the reliability that safety check cuts off and seals greatly.
Technical program of the present invention lies in: a kind of coaxial non-return flap difference range device, comprise main valve body with intake-outlet, described main valve body middle part is provided with the intermediate isolating ring, the feed-water end of described intermediate isolating ring is provided with first order flap, the waterexit end of described intermediate isolating ring is provided with second level flap, described first order flap is connected on the flap coupling shaft with second level flap is coaxial, described first order flap comprises that the first order flap center base of being located on the main valve body water intake reaches and the coaxial first order flap movable end that is connected of first order flap center base, be provided with the water inlet non-return seal arrangement that is positioned on the first order flap movable end between first order flap movable end and the first order flap center base, described second level flap comprises that the second level flap center base of being located on the main valve body water outlet reaches and the coaxial second level flap movable end that is connected of second level flap center base, be provided with the water outlet non-return seal arrangement that is positioned on the flap movable end of the second level between described second level flap movable end and the second level flap center base, be provided with the main spring that resets between described first order flap movable end and the second level flap movable end, it is characterized in that: described flap coupling shaft is by first ladder that is used to connect first order flap movable end, be used to connect second ladder and the 3rd ladder composition that is used to be connected second level flap center base of second level flap movable end, described the 3rd ladder is provided with Returnning spring between flap center base rear end, the second level and second level flap center base, second level flap center base was to the shaft part of the second level flap movable end operation when described the 3rd ladder was positioned at second level flap center base front end and is provided with in order to the non-return hermetically closing.
Described shaft part length is more than or equal to 10mm.
Described first order flap center base center is provided with the axis of guide, and the first ladder center correspondence of described flap coupling shaft is provided with so that the central duct that the axis of guide is connected.
Described main valve body also is provided with external hydathode outward, described external hydathode comprises valve body, described valve body top is provided with feed-water end, the bottom is provided with the waterexit end, be horizontally set with reciprocal left and right sides piston in the valve body, described left piston communicates with the water intake of main valve body and forms preceding pressure chamber, and described right piston links to each other with the water outlet of main valve body and forms the back pressure chamber, and described left piston is provided with the sealing seat that is used to seal the valve body drain opening.
Be provided with the Returnning spring that is used to make the piston return between the left valve gap of described left piston and external hydathode.
The invention has the advantages that: adopt the two-shipper non-return mechanism, adopt the two-stage flap to reach the effect of double seal, the particle that 6 ~ 8mm appears in any one-level non-return flap in double non-return is stuck in sealing surface, does not influence the sealing of other one-level non-return flap; The pressure loss is little, and resistance is low; The performance reliability height, even two sealing pairs are destroyed, its Leckage also seldom and is in time discharged by hydathode soon, guarantees safety of drinking water; Overall structure length is short, and size is little, from heavy and light; Easy maintenance is convenient to install.
Description of drawings
Fig. 1 is the structural representation of opening state of the present invention.
Fig. 2 is the structural representation of closed condition of the present invention.
Fig. 3 is an external hydathode structural representation of the present invention.
Embodiment
A kind of coaxial non-return flap difference range device, comprise main valve body 1 with intake-outlet, described main valve body middle part is provided with intermediate isolating ring 2, the feed-water end of described intermediate isolating ring is provided with first order flap, the waterexit end of described intermediate isolating ring is provided with second level flap, described first order flap is connected on the flap coupling shaft 3 with second level flap is coaxial, described first order flap comprises that the first order flap center base of being located on the main valve body water intake 45 reaches and the coaxial first order flap movable end 6 that is connected of first order flap center base, be provided with the water inlet non-return seal arrangement 7 that is positioned on the first order flap movable end between first order flap movable end and the first order flap center base, described second level flap comprises that the second level flap center base of being located on the main valve body water outlet 89 reaches and the coaxial second level flap movable end 10 that is connected of second level flap center base, be provided with the water outlet non-return seal arrangement 11 that is positioned on the flap movable end of the second level between described second level flap movable end and the second level flap center base, be provided with the main spring 12 that resets between described first order flap movable end and the second level flap movable end, it is characterized in that: described flap coupling shaft is by first ladder 13 that is used to connect first order flap movable end, be used to connect second ladder 14 and the 3rd ladder 15 compositions that are used to be connected second level flap center base of second level flap movable end, described the 3rd ladder is provided with Returnning spring 17 between flap center base rear end, the second level 16 and second level flap center base, second level flap center base was to the shaft part 18 of the second level flap movable end operation when described the 3rd ladder was positioned at second level flap center base front end and is provided with in order to the non-return hermetically closing.
In order to ensure after stopping up 6 ~ 8mm particle between second level flap and the main valve body and causing second level flap seal failure, first order flap still can be guaranteed sealing, and described shaft part length is more than or equal to 10mm.
Described first order flap center base center is provided with the axis of guide 19, and the first ladder center correspondence of described flap coupling shaft is provided with so that the central duct 20 that the axis of guide is connected.
After recharging in the main valve body, the sewage that causes in order to ensure seal failure can be discharged rapidly, described main valve body also is provided with external hydathode 21 outward, described external hydathode comprises valve body 22, described valve body top is provided with feed-water end 23, the bottom is provided with waterexit end 24, be horizontally set with reciprocal left and right sides piston in the valve body, described left piston 25 communicates with the water intake of main valve body and forms preceding pressure chamber 26, described right piston 27 links to each other with the water outlet of main valve body and forms back pressure chamber 28, and described left piston is provided with the sealing seat 30 that is used to seal valve body drain opening 29.
Be provided with the Returnning spring 32 that is used to make the piston return between the left valve gap 31 of described left piston and external hydathode.
Working principle of the present invention is as follows: the water outlet of main valve body is connected on the water transport pipeline, inlet pressure P1〉pressure P 2 of intermediate isolating ring inner chamber〉effluent pipe mouth pressure P 3, master reset length of spring compressed under the effect of water intake pressure, ordering about first order flap movable end moves to right, because the coaxial connection of two-stage flap, second level flap movable end moves to left, this moment, main valve body was in opening state, as shown in Figure 1, fed sheet of a media flows to water outlet from the water intake intermediate isolating ring inner chamber of flowing through, this moment, external hydathode was under the effect of pressure at two ends difference, left piston is to left movement, and the sealing seat of left piston seals the valve seat of external hydathode, and hydathode cuts out automatically.
When safety check was in closed condition, water intake pressure P 1 reduced, and the movable end of two-stage flap is shifted to two flap center bases under the effect of the main spring that resets, and realized double seal.
If when having the particulates plug of 6 ~ 8mm between second level flap and the main valve body, the seal failure of second level flap, because the two-stage flap is coaxial interlock, resetting of second level flap gets clogged, cause the movable end stroke of first order flap to reduce by 6 ~ 8mm, at this moment, under the action of reset spring of flap center base rear end, the second level, promote second level flap center base, second level flap movable end and first order flap movable end integral body to shifting left, guarantee the effective sealing between first order flap movable end and the first order flap center base; Because maximum free travel can be greater than 10mm under the action of reset spring, so when the particle of 6 ~ 8mm is stuck between second level flap and the valve seat, sealability that can movie star's first order flap.
If when having the particulates plug of 6 ~ 8mm between first order flap and the main valve body, the seal failure of first order flap, because the two-stage flap is coaxial interlock, resetting of first order flap gets clogged, cause the movable end stroke of second level flap to reduce by 6 ~ 8mm, hinder the sealing of second level flap movable end and its center base, because second level flap center base front end is provided with the shaft part of length greater than 10mm, can guarantee under the spring restoring force effect of second level flap center base to the displacement of second level flap movable end, thereby guarantee effective sealing of second level flap.
In sum, the particle that 6 ~ 8mm appears in any one-level non-return flap in double non-return is stuck in sealing surface, does not influence the sealing of other one-level non-return flap, guarantees the reliability of cutting off and sealing.
If the two-stage sealing was lost efficacy simultaneously, backing up of sewage such as main valve body, there is pressure difference h=P1-P3 in intake-outlet, as P3〉during P1, the left and right sides piston of external hydathode moves to right under the promotion of pressure at two ends difference, and the drain opening of external hydathode is opened, thereby the cavity at main valve body middle part is communicated with atmosphere, thereby the drain opening of guaranteeing external hydathode is kept maximum discharge capacity, has thoroughly blocked the refluence of downstream media and has polluted pipeline.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (5)
1. coaxial non-return flap difference range device, comprise main valve body with intake-outlet, described main valve body middle part is provided with the intermediate isolating ring, the feed-water end of described intermediate isolating ring is provided with first order flap, the waterexit end of described intermediate isolating ring is provided with second level flap, described first order flap is connected on the flap coupling shaft with second level flap is coaxial, described first order flap comprises that the first order flap center base of being located on the main valve body water intake reaches and the coaxial first order flap movable end that is connected of first order flap center base, be provided with the water inlet non-return seal arrangement that is positioned on the first order flap movable end between first order flap movable end and the first order flap center base, described second level flap comprises that the second level flap center base of being located on the main valve body water outlet reaches and the coaxial second level flap movable end that is connected of second level flap center base, be provided with the water outlet non-return seal arrangement that is positioned on the flap movable end of the second level between described second level flap movable end and the second level flap center base, be provided with the main spring that resets between described first order flap movable end and the second level flap movable end, it is characterized in that: described flap coupling shaft is by first ladder that is used to connect first order flap movable end, be used to connect second ladder and the 3rd ladder composition that is used to be connected second level flap center base of second level flap movable end, described the 3rd ladder is provided with Returnning spring between flap center base rear end, the second level and second level flap center base, second level flap center base was to the shaft part of the second level flap movable end operation when described the 3rd ladder was positioned at second level flap center base front end and is provided with in order to the non-return hermetically closing.
2. coaxial double check valve lobe difference range device according to claim 1, it is characterized in that: described shaft part length is more than or equal to 10mm.
3. coaxial double check valve lobe difference range device according to claim 1 is characterized in that: described first order flap center base center is provided with the axis of guide, and the first ladder center correspondence of described flap coupling shaft is provided with so that the central duct that the axis of guide is connected.
4. coaxial double check valve lobe difference range device according to claim 1, it is characterized in that: described main valve body also is provided with external hydathode outward, described external hydathode comprises valve body, described valve body top is provided with feed-water end, the bottom is provided with the waterexit end, be horizontally set with reciprocal left and right sides piston in the valve body, described left piston communicates with the water intake of main valve body and forms preceding pressure chamber, described right piston links to each other with the water outlet of main valve body and forms the back pressure chamber, and described left piston is provided with the sealing seat that is used to seal the valve body drain opening.
5. coaxial double check valve lobe difference range device according to claim 4 is characterized in that: be provided with the Returnning spring that is used to make the piston return between the left valve gap of described left piston and external hydathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105727828A CN102072342B (en) | 2010-12-04 | 2010-12-04 | Coaxial difference path device with double check valve clacks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105727828A CN102072342B (en) | 2010-12-04 | 2010-12-04 | Coaxial difference path device with double check valve clacks |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102072342A true CN102072342A (en) | 2011-05-25 |
| CN102072342B CN102072342B (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105727828A Expired - Fee Related CN102072342B (en) | 2010-12-04 | 2010-12-04 | Coaxial difference path device with double check valve clacks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102072342B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392905A (en) * | 2011-08-29 | 2012-03-28 | 福建高中压阀门科技有限公司 | Straight-through type water-hammer eliminating check valve |
| CN106641352A (en) * | 2016-12-28 | 2017-05-10 | 江苏特思克阀门制造有限公司 | Dual-purpose valve |
| CN107327598A (en) * | 2017-07-01 | 2017-11-07 | 宁波华成阀门有限公司 | A kind of compound double check valve (DCV) of copper modeling and its manufacture method |
| CN111963729A (en) * | 2020-09-10 | 2020-11-20 | 宁波杰克龙精工有限公司 | Low flow resistance check valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6443184B1 (en) * | 2000-07-25 | 2002-09-03 | Conbraco Industries, Inc. | Radially loaded, poppet-type check valve |
| CN2675985Y (en) * | 2004-01-12 | 2005-02-02 | 佛山市南海永兴阀门制造有限公司 | Double non-return backflow preventer |
| CN101614292A (en) * | 2009-07-21 | 2009-12-30 | 武汉大禹阀门制造有限公司 | Backflow preventer |
| CN201891880U (en) * | 2010-12-04 | 2011-07-06 | 福建高中压阀门科技有限公司 | Coaxial two-stage non-return valve clack lift differencing device |
-
2010
- 2010-12-04 CN CN2010105727828A patent/CN102072342B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6443184B1 (en) * | 2000-07-25 | 2002-09-03 | Conbraco Industries, Inc. | Radially loaded, poppet-type check valve |
| CN2675985Y (en) * | 2004-01-12 | 2005-02-02 | 佛山市南海永兴阀门制造有限公司 | Double non-return backflow preventer |
| CN101614292A (en) * | 2009-07-21 | 2009-12-30 | 武汉大禹阀门制造有限公司 | Backflow preventer |
| CN201891880U (en) * | 2010-12-04 | 2011-07-06 | 福建高中压阀门科技有限公司 | Coaxial two-stage non-return valve clack lift differencing device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392905A (en) * | 2011-08-29 | 2012-03-28 | 福建高中压阀门科技有限公司 | Straight-through type water-hammer eliminating check valve |
| CN106641352A (en) * | 2016-12-28 | 2017-05-10 | 江苏特思克阀门制造有限公司 | Dual-purpose valve |
| CN107327598A (en) * | 2017-07-01 | 2017-11-07 | 宁波华成阀门有限公司 | A kind of compound double check valve (DCV) of copper modeling and its manufacture method |
| CN111963729A (en) * | 2020-09-10 | 2020-11-20 | 宁波杰克龙精工有限公司 | Low flow resistance check valve |
| CN111963729B (en) * | 2020-09-10 | 2022-04-08 | 宁波杰克龙精工有限公司 | Low flow resistance check valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102072342B (en) | 2012-07-04 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CP03 | Change of name, title or address |
Address after: Fuxing Road, Jinan District, Fuzhou city of Fujian province 350014 No. 49 No. 3 No. 7 No. -8 store Patentee after: FUJIAN QUANPAI VALVE TECHNOLOGY CO.,LTD. Address before: 350014 Building 1, mill Li Industrial Zone, Tang Dian Town, Xin Dian Town, Jinan District, Fuzhou, Fujian Patentee before: Fujian High & Middle Pressure Valve Technology Co.,Ltd. |
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| 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: 20120704 |