CN101392845A - Broadspectrum corrosion resistant wear resistant rising-down check valve - Google Patents
Broadspectrum corrosion resistant wear resistant rising-down check valve Download PDFInfo
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- CN101392845A CN101392845A CNA2008101111769A CN200810111176A CN101392845A CN 101392845 A CN101392845 A CN 101392845A CN A2008101111769 A CNA2008101111769 A CN A2008101111769A CN 200810111176 A CN200810111176 A CN 200810111176A CN 101392845 A CN101392845 A CN 101392845A
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- check valve
- flap
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Abstract
The invention relates to a lift check valve with broad spectrum, corrosion resistance and wearing resistance. The lift check valve consists of main components, such as an upper valve body, a seal gasket, a stud nut, a valve clack, a lower valve body, and the like. The lift check valve can be widely applied to the industries such as petroleum chemical engineering, biopharmaceuticals, mine metallurgy, coal-fired generating, paper making, environmental protection, and the like, resists strong corrosive media such as sulfur dioxide, sulfuric acid, hydrochloric acid, aqua regia, and the like, and has corrosion resistance. The valve clack is of a cylindrical structure with eccentric inside diameter and outside diameter, and has good sealing effect and long service life; the connection ways of the valve and the pipelines are flexible and diverse.
Description
Technical field
The present invention relates to valving, be specifically related to a kind of Broadspectrum corrosion resistant wear resistant rising-down check valve that is widely used in all conglomeraties such as petrochemical industry, bio-pharmaceuticals, mine metallurgy, coal fired power generation, papermaking and environmental protection.
Background technique
In the prior art, the flap of traditional Lift check valve relies on the pressure of upstream medium to overcome deadweight and kinetic friction resistance and opens, and relies on the acting in conjunction of the pressure of downstream media reverse flow generation and deadweight and closes.In the process of opening and closing, flap is made straight line motion up and down.The diameter of flap targeting part is much smaller than the diameter of sealing surface, and flap forms " top-heavy " state.When the perpendicularity of safety check medial axis can not get guaranteeing, or when having corrosion products and impurity in the medium, the flap motion is subjected to jam easily, and sealing effect is not good enough.In clear water, sewage and general oil gas medium, traditional Lift check valve is because simple in structure, cheap for manufacturing cost, but still extensive use.But in the strong corrosive medium such as sulfur dioxide, sulfuric acid, hydrochloric acid and chloroazotic acid etc., people not only need the outstanding decay resistance of considering Lift check valve, also will consider the sky high cost problem of Lift check valve because of adopting precious metal material to cause.For this reason, people have invented major parts such as valve body, flap and have adopted the plastic check damper of macromolecular material making and the titanium alloy safety check that adopts titanium alloy material to make.
The decay resistance of plastic check damper is better than traditional Lift check valve, and fabricating cost is cheap.Shortcoming is that the moisture absorption of macromolecular material is strong, and the heatproof anti-pressure ability is low, and is easily aging, the operational safety deficiency.Titanium alloy safety check anti-knock shock resistance, it is ageing-resistant that resistance to compression is high temperature resistant, and the performance of anti-nitric acid, acetic acid one class strong corrosive medium is outstanding, but the corrosion of strong corrosive mediums such as not anti-sulfur dioxide, sulfuric acid, hydrochloric acid, chloroazotic acid, fabricating cost is higher, is similar to titanium alloy.
The prior art of safety check also has corrosion resistant alloy safety check such as monel alloy safety check, your alloy safety check of mattress section nickel.Its common trait is: valve body, flap etc. are all by the corrosion resistant alloy material integral manufacturing, and noble metal consumptions such as nickel are big, cost is high, and in corrosion-resistant media family, still do not have the wide spectrum corrosion resistance, and wear-resisting property is also on the low side.Keep away the passive situation that unavoidable material and medium " are sat in the right seat " one by one, be difficult to realize large-scale production in batches, can't reduce production costs significantly.The corrosion resistant alloy safety check is difficult to provide simultaneously enough wear resistancies when certain decay resistance is provided.
Summary of the invention
Purpose of the present invention is to overcome the deficiencies in the prior art, and a kind of Broadspectrum corrosion resistant wear resistant rising-down check valve that almost all shows extremely strong stability in the chemical mediator of various acidity or alkalescence is provided.
The objective of the invention is to be achieved through the following technical solutions.
A kind of Broadspectrum corrosion resistant wear resistant rising-down check valve, comprise major parts such as valve body, sealing gasket, stud nut and flap, described valve body is divided into upper valve body and two of following valve bodies, is combined into one by stud nut by the concentric locating seam, and the positioning spigot place of upper and lower valve body is provided with sealing gasket.It is cylindric that flap is, and places down in the valve body, and the external diameter of cylinder and the sealing surface of flap are all concentric with following valve body, and the internal diameter of cylinder is then eccentric with the external diameter maintenance of cylinder, and the sidewall of this cylinder offers four symmetrical windows as medium runner.
Upper and lower valve body and flap are by surface metallurgical technology, are composited by two or more metallic material.Its blank material is a carbon cast steel, and being compounded with a layer thickness on working surface is the cobalt-based surface hardening alloy of 1.0-1.4mm.
Broadspectrum corrosion resistant wear resistant rising-down check valve keeps in full accord with prior art aspect structure length, flange Conncetion cimension, to flap and working surface clinkering one deck cobalt-based surface hardening alloy of contact medium such as valve body up and down, to improve its corrosion-proof wear performance.It has reduced the consumption of valuable alloy material and nickel element, has reduced cost, has realized large-scale production in batches.
Description of drawings
Fig. 1 is a Broadspectrum corrosion resistant wear resistant rising-down check valve sectional structure schematic representation of the present invention;
Fig. 2 is that the A of Fig. 1 is to view.
Among the figure: 1, upper valve body, 2, sealing gasket, 3, stud nut, 4, flap, 5, valve body down.
Embodiment
Referring to Fig. 1, Fig. 2, Broadspectrum corrosion resistant wear resistant rising-down check valve comprises major parts such as valve body, sealing gasket 2, stud nut 3 and flap 4, described valve body is divided into upper valve body 1 and 5 two of following valve bodies, be combined into one by stud nut 3 by the concentric locating seam, the positioning spigot place of upper and lower valve body 1,5 is provided with sealing gasket 2.Flap 4 is cylindric, places down in the valve body 5, and the sealing surface of the external diameter of cylinder and flap 4 is all concentric with following valve body 5, and the internal diameter of this cylinder then keeps eccentric with the external diameter of cylinder, and the sidewall of this cylinder offers four symmetrical windows as medium runner.
Lift check valve of the present invention, its upper and lower two valve bodies are connected as one by stud nut by the concentric locating seam, its structure length, flange Conncetion cimension not only can keep in full accord with traditional Lift check valve, also can as easy as rolling off a logly satisfy the requirement of multiple standards series and nonstandard series.Valve body connects with also realizing two end flange being connected of pipeline (or container joint), and two ends are threaded, the multiple connection request that two ends clip connected or two ends various combination connect.
Pressure medium from updrift side promotes flap 4 upwards motion in the hole of following valve body 5, and when the positive stop at upper valve body 1 center was run on the flap top, motion stopped, and valve is in the complete opening state.Flow to the downstream in the guiding gutter of medium around flap.When disappearing from the pressure medium of updrift side, when perhaps the pressure of downstream direction medium reverse flow was greater than the pressure medium of updrift side, flap returned seat automatically, and valve is in buttoned-up status.
Different with the prior art that adopts discoid flap, flap 4 of the present invention is cylindric, places down in the valve body 5.The diameter of outside diameter of cylinder and flap sealing surface is not only very approaching, and all concentric with following valve body 5; Barrel bore then keeps suitably eccentric with outside diameter of cylinder.The sidewall of cylinder is offered four symmetrical windows, as medium runner.When the pressure medium from updrift side acted on flap, flap 4 also can produce suitable deflection simultaneously making straight line motion up and down in the valve body 5 down.Like this, avoid occurring " top-heavy " of flap, cause motion to be obstructed and the seal failure phenomenon.Constantly change the contact position of flap and following valve body sealing surface, help improving the reliability of sealing, increase the service life, and can reduce the installation precision requirement.
The overcurrent element that upper valve body 1, sealing gasket 2, flap 4 and following valve body 5 are contact mediums.Sealing gasket 2 is made by physics and chemical property very stable teflon, carbon fiber or Expanded graphite.The valve body up and down of metal overcurrent element and the material of flap select just to have determined the corrosion-proof wear feature of safety check.Different with the prior art that adopts corrosion resistant alloy material integral manufacturing metal overcurrent element, the practice of the present invention is: selecting carbon cast steel is the blank of metal overcurrent element, and it is not crisp firmly, has enough structural strengths.On the working surface of overcurrent element, the cobalt-based surface hardening alloy that compound one deck 1.0-1.40mm is thick.Recombination process divides secondary to finish in the high-temperature vacuum alloying furnace, and each composite thickness is 0.50-0.70mm, and fusion bonded temperature remains on about 1080 ℃.The surface hardening alloy has the high hardness of HRC61-71, extremely strong physics and chemical stability, and it gives overcurrent element with corrosion-proof wear and good characteristic such as anti-oxidant, can tolerate the almost various acidity except that hot concentrated sulfuric acid or the corrosion of alkali electroless medium.Inside nominal diameter is less than 200mm, and nominal pressure all can adopt said method to obtain the anti-corrosion resistance to high temperature of wide spectrum smaller or equal to the safety check of 6.4Mpa.Regulate the component of surface hardening alloy in the composite bed, can obtain the high hardness friction pair of different pairings, effectively improve the corrosion-proof wear performance of safety check.
Compared with prior art, the precious alloy material that consumes of the working surface of overcurrent element of the present invention Average out to the former about 15% owing to adopt high-temperature vacuum clinkering technology, avoided built-up welding, surfacing The common composition dilution phenomenon of technology and peel off, the defectives such as crackle, pore, the thickness of hardened layer can be thick Can be thin, compact and firm. Therefore, the technology of the present invention can make metal overcurrent element and polytetrafluoroethylene (PTFE) close Packing has the wide spectrum corrosion resisting property that is complementary. Not only in the strong corrosive mediums such as hydrochloric acid, chloroazotic acid, and And in the dilute sulfuric acid of the concentrated sulfuric acid and various temperature, can both show the duty of stabilizer pole, far excellent The level that can reach in traditional corrosion resistant alloy check-valves. Realized in batches large-scale production, significantly Reduced production cost.
Claims (4)
1. Broadspectrum corrosion resistant wear resistant rising-down check valve, it is characterized in that: it comprises valve body, sealing gasket (2), stud nut (3) and flap major parts such as (4), described valve body is divided into (5) two of upper valve body (1) and following valve bodies, be combined into one by stud nut (3) by the concentric locating seam, the positioning spigot place of upper and lower valve body (1,5) is provided with sealing gasket (2).
2. Broadspectrum corrosion resistant wear resistant rising-down check valve according to claim 1, it is characterized in that: described flap (4) is cylindric, place down in the valve body (5), the sealing surface of the external diameter of cylinder and flap (4) is all concentric with following valve body (5), the internal diameter of this cylinder is then eccentric with the external diameter maintenance of cylinder, and the sidewall of this cylinder offers four symmetrical windows as medium runner.
3. Broadspectrum corrosion resistant wear resistant rising-down check valve according to claim 1, it is characterized in that: described upper and lower valve body (1,5) and flap (4) pass through surface metallurgical technology, be composited by two or more metallic material, its blank material is a carbon cast steel, and being compounded with a layer thickness on working surface is the cobalt-based surface hardening alloy of 1.0-1.4mm.
4. Broadspectrum corrosion resistant wear resistant rising-down check valve according to claim 1, it is characterized in that: the recombination process of described cobalt-based surface hardening alloy, be to divide secondary to finish in the high-temperature vacuum alloying furnace, each composite thickness is 0.50-0.70mm, and fusion bonded temperature remains on about 1080 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101111769A CN101392845A (en) | 2008-06-12 | 2008-06-12 | Broadspectrum corrosion resistant wear resistant rising-down check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101111769A CN101392845A (en) | 2008-06-12 | 2008-06-12 | Broadspectrum corrosion resistant wear resistant rising-down check valve |
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| Publication Number | Publication Date |
|---|---|
| CN101392845A true CN101392845A (en) | 2009-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101111769A Pending CN101392845A (en) | 2008-06-12 | 2008-06-12 | Broadspectrum corrosion resistant wear resistant rising-down check valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095003A (en) * | 2010-12-10 | 2011-06-15 | 顾天罡 | Liquid sealed fume extractor check valve |
| CN111075554A (en) * | 2018-10-19 | 2020-04-28 | 丰田自动车株式会社 | Thermostat and cooling water passage structure |
-
2008
- 2008-06-12 CN CNA2008101111769A patent/CN101392845A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095003A (en) * | 2010-12-10 | 2011-06-15 | 顾天罡 | Liquid sealed fume extractor check valve |
| CN111075554A (en) * | 2018-10-19 | 2020-04-28 | 丰田自动车株式会社 | Thermostat and cooling water passage structure |
| CN111075554B (en) * | 2018-10-19 | 2022-05-24 | 丰田自动车株式会社 | Thermostat and cooling water passage structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| ASS | Succession or assignment of patent right |
Owner name: VOLKSWAGEN VALVE GROUP CO.,LTD. Free format text: FORMER OWNER: WANG XIAOTIAN Effective date: 20090508 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20090508 Address after: Dong'ou Industrial District of Wenzhou city in Zhejiang Province Applicant after: Dazhong Valve Group Co., Ltd. Address before: Unit 1, building 1, Ruixin Li, en Ji Road, Haidian District, Beijing 802 Applicant before: King of heaven Co-applicant before: Dazhong Valve Group Co., Ltd. Co-applicant before: Yao Chunling |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090325 |