CN102818051A - Check valve capable of reducing pressure of water hammer - Google Patents
Check valve capable of reducing pressure of water hammer Download PDFInfo
- Publication number
- CN102818051A CN102818051A CN2012103248495A CN201210324849A CN102818051A CN 102818051 A CN102818051 A CN 102818051A CN 2012103248495 A CN2012103248495 A CN 2012103248495A CN 201210324849 A CN201210324849 A CN 201210324849A CN 102818051 A CN102818051 A CN 102818051A
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- main valve
- valve body
- piston
- decompression valves
- flap
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Abstract
The invention discloses a check valve capable of reducing the pressure of a water hammer. The check valve comprises a main valve body and a main valve clack, wherein the main valve body is provided with a water inlet and a water outlet, the main valve clack is hinged and fixed installed in the inner cavity between the water inlet and the water outlet of the main valve body, a baffle plate is arranged on the end surface of the main valve clack, facing the water inlet of the main valve body, a pressure release valve is fixedly installed on the end surface of the main valve clack, facing the water outlet of the main valve body, and the pressure release valve comprises a pressure release valve body, a pressure release valve clack, a valve clack ejector rod, a reset spring, a piston cylinder, a piston rod and a piston. According to the check valve, the pressure release valve is arranged on the main valve clack, and the pressure release valve is switched off slowly, so that the pressure release valve is in a switching-on state at the instant when the main valve clack is switched off rapidly, further when the main valve clack is closed rapidly, the pressure of the water hammer can be released effectively by the pressure release valve, and therefore the pressure of the water hammer when the check valve is switched off can be reduced effectively.
Description
Technical field
The present invention relates to a kind of safety check, be specifically related to a kind of safety check that can reduce water hammer pressure.
Background technique
Safety check mainly is installed in the pipe-line system, is used to prevent the refluence of pipeline medium.When ducted medium forward flow (flowing to water outlet from the water intake of main valve body), the flap of safety check is opened under the effect of medium power automatically; And when ducted medium reverse flow (flowing to water intake) from the water outlet of main valve body; The flap of safety check is closed under the effect of medium power automatically; But in the moment that the safety check flap is closed, particularly larger-size pipeline can produce very big water hammer pressure usually; Water hammer pressure even can reach the several times of the normal pressure medium of pipeline, and too high water hammer pressure can cause damage to valve and whole tubing.
Summary of the invention
To the deficiency of existing technology, the invention provides a kind of safety check that can reduce the water hammer pressure that main valve clack moment produces when closing.
For realizing above-mentioned purpose, the invention provides a kind of safety check that can reduce water hammer pressure, comprise main valve body, main valve clack; Main valve body is provided with water intake and water outlet; In the hinged inner chamber that is installed between main valve body water intake and the water outlet of described main valve clack, said main valve clack is provided with baffle plate towards the end face of main valve body water intake, and said main valve clack is fixed with Decompression valves on the end face of main valve body water outlet; Described Decompression valves comprises Decompression valves valve body, Decompression valves flap, flap push rod, Returnning spring, piston cylinder, piston rod, piston; The Decompression valves valve body is installed in main valve clack on the end face of main valve body water outlet, and the Decompression valves flap is installed in the inner chamber of Decompression valves valve body, and described flap push rod is arranged in the main valve clack; One end of flap push rod and Decompression valves flap one end end face are affixed; On the end face of main valve body water intake, joins by the other end of the other end of baffle plate and flap push rod top in main valve clack for one end hinged securement of said baffle plate, the cross section of the said piston cylinder structure that takes the shape of the letter U; And the opening end of U-shaped piston cylinder is towards the water outlet of main valve body; Install Returnning spring between the other end end face of the bottom surface of U-shaped piston cylinder and Decompression valves flap, piston rod is arranged in the piston cylinder, and piston rod is positioned on this end end of piston cylinder and is equiped with piston; It is affixed that piston rod is positioned at the piston cylinder outer the other end and Decompression valves flap, also is provided with the piston aperture of axial perforation side face of piston ring on the described piston.
Principle of the present invention is: when ducted medium forward flow (flowing to water outlet from the water intake of main valve body); Main valve clack is opened under the effect of medium power automatically; Baffle plate also is affixed to main valve clack under the effect of medium power simultaneously; And, open Decompression valves, thereby make Decompression valves under the main valve clack open mode, be in the enable possition all the time through flap push rod jack-up Decompression valves flap; When ducted medium reverse flow (flowing to water intake from the water outlet of main valve body), main valve clack quick closedown under the effect of medium power is after main valve clack is closed; Baffle plate has not had the effect of medium power; Also just lost the active force of jack-up Decompression valves flap, described Decompression valves flap just resets under the effect of Returnning spring, and drives piston rod and the same moved further of piston; Because be full of medium in the piston cylinder this moment; Therefore must the medium in the piston cylinder be discharged through the piston aperture gradually when piston moves down, thereby make that the Decompression valves flap can not quick closedown, can only slowly close along with the discharge gradually of piston cylinder medium.
The invention has the beneficial effects as follows: adopt said structure, when the main valve clack quick closedown, because main valve clack has blocked flowing of pipeline medium suddenly, the kinetic energy of flowing medium will convert the pressure ability to this moment, promptly produce water hammer pressure.Because the present invention is provided with Decompression valves on main valve clack; And described Decompression valves is slowly to cut out; Therefore in moment of main valve clack quick closedown; Decompression valves still is in opening state, thereby the water hammer pressure that produces when making the main valve clack quick closedown can be released and then the water hammer pressure when having reduced closure of check ring effectively effectively through Decompression valves.
The present invention can further be set to described baffle plate and be installed on the main valve clack through the baffle plate bearing pin, and said baffle plate is spent less than 90 around the angle of baffle plate bearing pin rotation.
The present invention also can further be set to described Decompression valves valve body and be spirally connected and be fixed on the main valve clack.
Description of drawings
Fig. 1 is the structural representation of main valve clack closed condition among the present invention;
Fig. 2 is the structural representation of main valve clack opening state among the present invention;
Fig. 3 is the I portion enlarged view of Fig. 1.
Embodiment
Like Fig. 1,2, provided a kind of safety check that can reduce water hammer pressure shown in 3; Comprise main valve body 1, main valve clack 2; Main valve body 1 is provided with water intake 11 and water outlet 12, and in the described main valve clack 2 hinged inner chambers that are installed between main valve body water intake 11 and the water outlet 12, said main valve clack 2 is provided with baffle plate 3 towards the end face 21 of main valve body water intake 11; Said main valve clack 2 is fixed with Decompression valves 4 on the end face 22 of main valve body water outlet 12; Described Decompression valves 4 comprises Decompression valves valve body 41, Decompression valves flap 42, flap push rod 43, Returnning spring 44, piston cylinder 45, piston rod 46, piston 47, and Decompression valves valve body 41 is spirally connected and is installed in main valve clack 2 on the end face 22 of main valve body water outlet 12, and Decompression valves flap 42 is installed in the inner chamber of Decompression valves valve body 41; Described flap push rod 43 is arranged in the main valve clack 2; One end of flap push rod 43 and Decompression valves flap 42 1 end end faces are affixed, an end of said baffle plate 3 through baffle plate bearing pin 5 hinged securement in main valve clack 2 on the end face 21 of main valve body water intake 11, and said baffle plate 3 around the angle of baffle plate bearing pin 5 rotation less than 90 degree; Join on the other end top of the other end of baffle plate 3 and flap push rod 43; The cross section of said piston cylinder 45 structure that takes the shape of the letter U, and the opening end of U-shaped piston cylinder 45 is towards the water outlet 12 of main valve body 1, installing Returnning spring 44 between the other end end face of the bottom surface of U-shaped piston cylinder 45 and Decompression valves flap 42; Piston rod 46 is arranged in the piston cylinder 45; And piston rod 46 is positioned on this end end of piston cylinder 45 and is equiped with piston 47, and it is affixed that piston rod 46 is positioned at the piston cylinder 45 outer the other end and Decompression valves flap 42, also is provided with the piston aperture 471 of axial perforation piston 47 both ends of the surface on the described piston 47.Because the present invention is provided with Decompression valves 4 on main valve clack 2; And described Decompression valves 4 is slowly to cut out; Therefore in moment of main valve clack 2 quick closedowns; Decompression valves 4 still is in opening state, thereby the water hammer pressure that produces when making main valve clack 2 quick closedowns can be released and then the water hammer pressure when having reduced closure of check ring effectively effectively through Decompression valves 4.
Claims (3)
1. safety check that can reduce water hammer pressure; Comprise main valve body, main valve clack, main valve body is provided with water intake and water outlet, in the hinged inner chamber that is installed between main valve body water intake and the water outlet of described main valve clack; It is characterized in that: said main valve clack is provided with baffle plate towards the end face of main valve body water intake; Said main valve clack is fixed with Decompression valves on the end face of main valve body water outlet, described Decompression valves comprises Decompression valves valve body, Decompression valves flap, flap push rod, Returnning spring, piston cylinder, piston rod, piston, and the Decompression valves valve body is installed in main valve clack on the end face of main valve body water outlet; The Decompression valves flap is installed in the inner chamber of Decompression valves valve body; Described flap push rod is arranged in the main valve clack, and an end of flap push rod and Decompression valves flap one end end face are affixed, an end hinged securement of said baffle plate in main valve clack on the end face of main valve body water intake; Join on the other end top of the other end of baffle plate and flap push rod; The cross section of the said piston cylinder structure that takes the shape of the letter U, and the opening end of U-shaped piston cylinder is installed Returnning spring towards the water outlet of main valve body between the other end end face of the bottom surface of U-shaped piston cylinder and Decompression valves flap; Piston rod is arranged in the piston cylinder; And piston rod is positioned on this end end of piston cylinder and is equiped with piston, and it is affixed that piston rod is positioned at the piston cylinder outer the other end and Decompression valves flap, also is provided with the piston aperture of axial perforation side face of piston ring on the described piston.
2. a kind of safety check that can reduce water hammer pressure according to claim 1, it is characterized in that: described baffle plate is installed on the main valve clack through the baffle plate bearing pin, and said baffle plate is spent less than 90 around the angle of baffle plate bearing pin rotation.
3. a kind of safety check that can reduce water hammer pressure according to claim 1 is characterized in that: described Decompression valves valve body is spirally connected and is fixed on the main valve clack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103248495A CN102818051A (en) | 2012-09-05 | 2012-09-05 | Check valve capable of reducing pressure of water hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103248495A CN102818051A (en) | 2012-09-05 | 2012-09-05 | Check valve capable of reducing pressure of water hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102818051A true CN102818051A (en) | 2012-12-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103248495A Pending CN102818051A (en) | 2012-09-05 | 2012-09-05 | Check valve capable of reducing pressure of water hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102818051A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339471A (en) * | 2017-02-09 | 2017-11-10 | 上海冠龙阀门自控有限公司 | A kind of barrier film buffer-type rubber flap check valve |
| US10876644B2 (en) | 2018-05-22 | 2020-12-29 | Goodrich Corporation | Aspirator system pressure relief mechanism |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4617959A (en) * | 1985-10-04 | 1986-10-21 | Nippondenso Co., Ltd. | Check valve assembly for pipeline system |
| CN2089104U (en) * | 1990-12-24 | 1991-11-20 | 阜宁县第一机械厂 | Safety ball check valve |
| CN2149532Y (en) * | 1993-03-05 | 1993-12-15 | 郑州蝶阀厂 | Slow-stop butterfly check valve |
| JPH10220603A (en) * | 1997-02-12 | 1998-08-21 | Tomoe Gijutsu Kenkyusho:Kk | Dual plate check valve |
| CN2517933Y (en) * | 2001-11-15 | 2002-10-23 | 任育才 | Energy elimination check valve |
| CN101520101A (en) * | 2009-03-11 | 2009-09-02 | 湖南泵阀制造有限公司 | Double-plate slow-shut check valve |
| CN201723794U (en) * | 2010-05-11 | 2011-01-26 | 上海东方威尔阀门有限公司 | Microresistance slow closing check valve |
| CN202327249U (en) * | 2011-11-08 | 2012-07-11 | 安徽铜都阀门股份有限公司 | Novel butterfly micro-resistance slow closing check valve |
| CN202733070U (en) * | 2012-09-05 | 2013-02-13 | 浙江超达阀门股份有限公司 | Check valve capable of reducing water hammer pressure |
-
2012
- 2012-09-05 CN CN2012103248495A patent/CN102818051A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4617959A (en) * | 1985-10-04 | 1986-10-21 | Nippondenso Co., Ltd. | Check valve assembly for pipeline system |
| CN2089104U (en) * | 1990-12-24 | 1991-11-20 | 阜宁县第一机械厂 | Safety ball check valve |
| CN2149532Y (en) * | 1993-03-05 | 1993-12-15 | 郑州蝶阀厂 | Slow-stop butterfly check valve |
| JPH10220603A (en) * | 1997-02-12 | 1998-08-21 | Tomoe Gijutsu Kenkyusho:Kk | Dual plate check valve |
| CN2517933Y (en) * | 2001-11-15 | 2002-10-23 | 任育才 | Energy elimination check valve |
| CN101520101A (en) * | 2009-03-11 | 2009-09-02 | 湖南泵阀制造有限公司 | Double-plate slow-shut check valve |
| CN201723794U (en) * | 2010-05-11 | 2011-01-26 | 上海东方威尔阀门有限公司 | Microresistance slow closing check valve |
| CN202327249U (en) * | 2011-11-08 | 2012-07-11 | 安徽铜都阀门股份有限公司 | Novel butterfly micro-resistance slow closing check valve |
| CN202733070U (en) * | 2012-09-05 | 2013-02-13 | 浙江超达阀门股份有限公司 | Check valve capable of reducing water hammer pressure |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339471A (en) * | 2017-02-09 | 2017-11-10 | 上海冠龙阀门自控有限公司 | A kind of barrier film buffer-type rubber flap check valve |
| CN107339471B (en) * | 2017-02-09 | 2023-08-08 | 上海冠龙阀门自控有限公司 | Diaphragm buffer type rubber flap check valve |
| US10876644B2 (en) | 2018-05-22 | 2020-12-29 | Goodrich Corporation | Aspirator system pressure relief mechanism |
| EP3572697B1 (en) * | 2018-05-22 | 2023-12-20 | Goodrich Corporation | Aspirator system pressure relief mechanism |
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| PB01 | Publication | ||
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Application publication date: 20121212 |