CN106032850A - Condensation water drainable check valve used for steam pipeline - Google Patents
Condensation water drainable check valve used for steam pipeline Download PDFInfo
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- CN106032850A CN106032850A CN201510112768.2A CN201510112768A CN106032850A CN 106032850 A CN106032850 A CN 106032850A CN 201510112768 A CN201510112768 A CN 201510112768A CN 106032850 A CN106032850 A CN 106032850A
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- valve
- valve body
- check
- condensation water
- valve seat
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Abstract
The invention belongs to the technical field of pipeline check valves, and specifically relates to a condensation water drainable check valve used for a steam pipeline, and the check valve can automatically stop steam from flowing backward, and when pressure on an inlet side is lower than pressure on an outlet side, a valve clack automatically closes to prevent backflow of steam and unnecessary heat loss under actions of medium pressure difference and gravity of the valve clack and other factors. The check valve comprises a valve body (1), a valve element (2), a drain (3), and a valve seat (4). The valve body (1) and the valve seat (4) are in a hollow cylindrical tubular shape. The valve body (1) is on the upper end of the valve seat (4). The drain (3) is arranged on the upper end of the junction of the valve body (1) and the valve seat (4), and the valve element (2) is in the valve body (1) and the valve seat (4).
Description
Technical field
The invention belongs to pipe line check valve technical field, be specifically related to the check-valves of a kind of dredged condensation water for jet chimney.
Background technology
It is high that general jet chimney has temperature, and pressure is low, and flow velocity is fast, and vibration is big, is easily generated the features such as condensation water.The features such as the check-valves installed on jet chimney needs to open and close rapidly, good airproof performance, lightweight construction, flexible movements, moreover it is possible to according to self needing to condense after drain water before system comes into operation.
On jet chimney, after being arranged on stand-by boiler or heat exchanger, when system disables for preventing other steam user and stand-by equipment from producing heat exchange and needing check-valves check medium, but not circulating of steam medium will certainly produce condensation water, condense the generation of water again will next time steam to come into operation be to cause pipeline to have a strong impact on (water hammer), it is therefore desirable to a kind of can reliably get rid of again the check equipment condensing water by non-return.
Summary of the invention
The technical problem to be solved is, not enough for prior art, there is provided one can be automatically prevented from steam reverse flow, when inlet side pressure is less than outlet side, flap is automatically switched off to prevent steam from flowing backwards under the factor effect such as medium differential pressure, gravity own, produces the check-valves of a kind of dredged condensation water for jet chimney of unnecessary thermal losses.
The technical solution adopted in the present invention is:
A kind of check-valves of the dredged condensation water for jet chimney, including valve body, spool, hydrophobic and valve seat, described valve body and valve seat are hollow cylindrical tubulose, and wherein valve body is located at valve seat upper end, hydrophobic being located at valve body and upper end, valve seat junction, spool is located at inside valve body and valve seat.
Described valve body and valve base cavity junction are provided with sealing surface.
Described spool is located on sealing surface.
High temperature resistant acrylate rubber coated is used outside described spool.
The invention has the beneficial effects as follows:
1. can use the design of micro-resistance swing check valve structure by hydrophobic steam check-valves, use flange design, lightweight, seal reliable；
2. this check valve design flow is big, the little good seal performance of flow resistance loss, and noise elimination closedown can reduce surge wave, and swing type structure designs then level or perpendicular from installing, and prevents medium from flowing backwards and can discharge condensation water by drain water piping；
3. using high temperature resistant acrylate rubber coated spool is the elasticity utilizing rubber, this design can anti-non-return seat time spool smash, and improve valve seal and ensure valve seal and non-leaked steam；
4. simple in construction, lightweight, weight only have about 1/3rd of valve gap swing check valve；Slow Close systematic function is excellent, is not affected by pipeline medium, Slow Close behind flap first speed pass, can prevent destruction water hammer；High-temperature resistant rubber soft seal, closed performance is good, and wear-resistant, service life is long；Rubber coated spool has cushioning effect, opens and closes steadily, friction, and noiselessness is little to pipeline impact；Less than lift and common swing check valve flow resistance, there is obvious energy-saving effect；Flange joint designs, easy accessibility, it is easy to repair and replacement.
Accompanying drawing explanation
Fig. 1 is the check-valves schematic diagram of a kind of dredged condensation water for jet chimney；
Fig. 2 is the check-valves top view of a kind of dredged condensation water for jet chimney；
Fig. 3 is the check-valves valve open mode schematic diagram of a kind of dredged condensation water for jet chimney；
Fig. 4 is the check-valves valve-closed state schematic diagram of a kind of dredged condensation water for jet chimney.
In figure: 1. valve body；2. spool；The most hydrophobic；4. valve seat；5. sealing surface.
Detailed description of the invention
A kind of check-valves for the dredged condensation water of jet chimney provided the present invention with embodiment below in conjunction with the accompanying drawings is introduced:
A kind of check-valves of the dredged condensation water for jet chimney, including valve body 1, spool 2, hydrophobic 3 and valve seat 4, described valve body 1 and valve seat 4 are hollow cylindrical tubulose, wherein valve body 1 is located at valve seat 4 upper end, hydrophobic 3 are located at valve body 1 and upper end, valve seat 4 junction, and spool 2 is located at valve body 1 and valve seat 4 is internal.
Described valve body 1 and valve seat 4 inner chamber junction are provided with sealing surface 5.
Described spool 2 is located on sealing surface 5.
High temperature resistant acrylate rubber coated is used outside described spool 2.
The design of micro-resistance swing check valve structure can be used by hydrophobic steam check-valves, use flange design, lightweight, seal reliable.Using high temperature resistant acrylate rubber coated spool, under the effect of steam, spool can be opened or closed by the cooperation of the axle on spool and the shaft hole of valve body.This check valve design flow is big, the little good seal performance of flow resistance loss, and noise elimination closedown can reduce surge wave, and swing type structure designs then level or perpendicular from installing, and prevents medium from flowing backwards and can discharge condensation water by drain water piping.
Using high temperature resistant acrylate rubber coated spool is the elasticity utilizing rubber, this design can anti-non-return seat time spool smash, and improve valve seal and ensure valve seal and non-leaked steam.Rotation enlightenment design ensures that valve quickly opens and closes.And, because the general pressure ratio of jet chimney is relatively low, this rubber coated spool lightweight, it is used on jet chimney more more reliable than lift, does not haves the bite that lift valve often occurs and the fault refused out.
This check-valves specific design feature is the critical piece forging process such as upper valve body and lower valve body spool.The volume weldering of its upper and lower valve body standard stainless-steel sheet, flange and floor are imported and exported in volume postwelding full weld fillet welding welding.
Connected by bolt between valve body, coordinate on flange face by mach method turning sealing surface of seat with upper valve body at lower valve body, owing to using " metal-non-metal " sealing pair, therefore sealing surface of seat need not the hard alloy of independent built-up welding other materials, but it is intended to use grinding process to make the roughness of sealing surface of seat reach more than Ra0.8, seal f ace width can select according to pressure rank, but is usually no more than 8mm, and sealing surface height is 3～5mm.
Also need to be milled out by machine-tooled method the axis hole of valve core shaft on combination flange face between upper and lower valve body, be G6/m6 according to the fit tolerance grade in the operating characteristic of valve, chosen axis and hole.
Spool is placed on the sealing surface of seat of lower valve body, and the rotating shaft of spool matches with axis hole, installs valve body afterwards, is bolted upper and lower valve flange and makes valve core shaft be positioned in the axis hole of upper and lower valve body.
After being arranged on stand-by boiler or heat exchanger, when stand-by boiler disables, under the effect of back pressure, this valve is closed rapidly by back pressure effect, spool is non-metal-rubber, effect bottom spool rubber adhesive in back pressure extrudes sealing surface of seat, the deformation of resistant to elevated temperatures elastomeric material produces seal pressure on sealing pair, stop steam after valve, make valve seal.
Owing to after valve, steam does not flows, steam heat scatters and disappears to be formed in duct bottom and condenses water, and at this moment the hot power Automatic steam trap Trap of weep hole after valve and connection can get rid of condensation water in time, it is ensured that stand-by boiler or exchanger can be used.
When system comes into operation, owing to not condensing water after valve, valve is quickly opened under pressure medium, will not produce water hammer completely.
Claims (4)
1. the check-valves for the dredged condensation water of jet chimney, it is characterised in that: include valve body
(1), spool (2), hydrophobic (3) and valve seat (4), during described valve body (1) and valve seat (4) are
Hollow-cylindrical tubulose, wherein valve body (1) is located at valve seat (4) upper end, and hydrophobic (3) are located at valve body (1)
With valve seat (4) upper end, junction, spool (2) is located at valve body (1) and valve seat (4) is internal.
The check-valves of a kind of dredged condensation water for jet chimney the most according to claim 1, its
It is characterised by: described valve body (1) and valve seat (4) inner chamber junction are provided with sealing surface (5).
The check-valves of a kind of dredged condensation water for jet chimney the most according to claim 1, its
It is characterised by: described spool (2) is located on sealing surface (5).
The check-valves of a kind of dredged condensation water in jet chimney the most according to claim 1, it is special
Levy and be: described spool (2) outside uses high temperature resistant acrylate rubber coated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510112768.2A CN106032850A (en) | 2015-03-13 | 2015-03-13 | Condensation water drainable check valve used for steam pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510112768.2A CN106032850A (en) | 2015-03-13 | 2015-03-13 | Condensation water drainable check valve used for steam pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106032850A true CN106032850A (en) | 2016-10-19 |
Family
ID=57150094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510112768.2A Pending CN106032850A (en) | 2015-03-13 | 2015-03-13 | Condensation water drainable check valve used for steam pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106032850A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3955596A (en) * | 1973-09-10 | 1976-05-11 | Benigno Diaz | Sewer pest control check valve |
| US20100326544A1 (en) * | 2009-06-29 | 2010-12-30 | John Ernest Elwart | Shock responsive check valve |
| CN102563133A (en) * | 2012-03-05 | 2012-07-11 | 魏伯卿 | Energy-saving micro-resistance adjustable self-balancing check valve |
| CN202852083U (en) * | 2012-09-29 | 2013-04-03 | 浙江佰通防腐设备有限公司 | Swing check valve with polyfluoroalkoxy (PFA) lining |
| CN203297690U (en) * | 2013-06-13 | 2013-11-20 | 上海耐腐阀门集团有限公司 | Rotating-opening-type check valve |
| CN203297689U (en) * | 2013-06-13 | 2013-11-20 | 上海耐腐阀门集团有限公司 | Swing check valve |
| CN104180029A (en) * | 2014-09-05 | 2014-12-03 | 上海冠龙阀门机械有限公司 | Screwing opening type check valve capable of balancing pressure automatically |
| CN204784881U (en) * | 2015-03-13 | 2015-11-18 | 江苏核电有限公司 | A check valve that is used for condensate water dredged of steam conduit |
-
2015
- 2015-03-13 CN CN201510112768.2A patent/CN106032850A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3955596A (en) * | 1973-09-10 | 1976-05-11 | Benigno Diaz | Sewer pest control check valve |
| US20100326544A1 (en) * | 2009-06-29 | 2010-12-30 | John Ernest Elwart | Shock responsive check valve |
| CN102563133A (en) * | 2012-03-05 | 2012-07-11 | 魏伯卿 | Energy-saving micro-resistance adjustable self-balancing check valve |
| CN202852083U (en) * | 2012-09-29 | 2013-04-03 | 浙江佰通防腐设备有限公司 | Swing check valve with polyfluoroalkoxy (PFA) lining |
| CN203297690U (en) * | 2013-06-13 | 2013-11-20 | 上海耐腐阀门集团有限公司 | Rotating-opening-type check valve |
| CN203297689U (en) * | 2013-06-13 | 2013-11-20 | 上海耐腐阀门集团有限公司 | Swing check valve |
| CN104180029A (en) * | 2014-09-05 | 2014-12-03 | 上海冠龙阀门机械有限公司 | Screwing opening type check valve capable of balancing pressure automatically |
| CN204784881U (en) * | 2015-03-13 | 2015-11-18 | 江苏核电有限公司 | A check valve that is used for condensate water dredged of steam conduit |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161019 |
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| RJ01 | Rejection of invention patent application after publication |