CN201293109Y - Double eccentric butterfly valve plate - Google Patents
Double eccentric butterfly valve plate Download PDFInfo
- Publication number
- CN201293109Y CN201293109Y CNU2008202208540U CN200820220854U CN201293109Y CN 201293109 Y CN201293109 Y CN 201293109Y CN U2008202208540 U CNU2008202208540 U CN U2008202208540U CN 200820220854 U CN200820220854 U CN 200820220854U CN 201293109 Y CN201293109 Y CN 201293109Y
- Authority
- CN
- China
- Prior art keywords
- valve plate
- eccentric butterfly
- plate body
- butterfly valve
- double
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a valve plate of a double-eccentric butterfly valve, which adopts a whole cast steel structure. A whole cast steel valve plate body comprises a shaft seat and a shaft seat hole, wherein a key slot and a screw hole for fastening a shaft are disposed on the shaft seat hole. The valve plate of the double-eccentric butterfly valve is characterized in that a valve plate of an original double-eccentric butterfly valve is combined with a valve plate body, a sealing ring and a plunger ring and connected with the same into a whole by a plurality of fasteners is replaced; the valve plate body is made of low-carbon cast steel of ZG23-450, and a sealing surface is directly arranged on the periphery of the whole cast steel valve plate body; a heat-resistant and corrosion-resistant material suitable for resurfacing welding is used on the sealing surface according to working conditions, and stainless steel or a hard alloy, such as stainless steel of 1Cr18Ni9Ti and a hard alloy of ZD5, is generally adopted as the material. The utility model has the advantages of simple structure, easy manufacture, low cost, high performance price ratio and favorable use effect, solves various problems existed in a combined valve plate of the original double-eccentric butterfly valve, avoids the complication and the trouble for mounting and dismounting the combined valve plate, effectively prolongs the normal maintenance and use periods of the double-eccentric butterfly valve and reduces the hidden danger in production.
Description
Technical field
The utility model relates to a kind of double eccentric butterfly valve of blast funnace hot blast stove pipe applications, relates in particular to a kind of double eccentric butterfly valve plate.
Background technique
In the various pipes of system for blast furnace ironmaking, have a large amount of in, Subzero valve, be medium temperature less than 500 ℃ valve, usually adopt perpendicular type gate valve, double eccentric butterfly valve, wherein perpendicular type gate valve has that sealing is good, reliability is high, the life-span is long and Applicable media temperature advantages of higher, but it is huge, heavy that its shortcoming is a structure, it is very inconvenient to install, debug and change, and the price height.Not in valve plate mid-depth and valve shaft twice off-centre in the center of circle, passes through valve body latus rectum cross section not, valve has and closes tight more function more double eccentric butterfly valve, and physical dimension is little, in light weight, price is lower, thereby is widely adopted on medium and small blast furnace by valve shaft.But double eccentric butterfly valve plate need be waited to improve, and former valve plate links one by valve plate body, seal ring and trim ring combination by numerous fastening pieces, and structure is comparatively complicated, and manufacture difficulty is big, the installing/dismounting trouble, and cost is higher; Its original intention is for replaceable behind the ring wear; But actual use condition is: have uniform temperature in the various pipes of system for blast furnace ironmaking, and medium has certain corrosivity, often seal ring damages when needing to change, also lost efficacy in other position of valve, the fastening piece that particularly connects trim ring and valve plate body has become rusty extremely and embrittlement, disconnected once twisting, can't change seal ring at all.Thereby, develop a kind of simply be easy to do and valve plate that cost performance is high very necessary.
Summary of the invention
In order to solve the problem that above-mentioned double eccentric butterfly valve plate exists, a kind of novel double eccentric butterfly valve plate now is provided, it is simple in structure, makes easily, and is with low cost, the cost performance height.
The technological scheme that the prior art problem that solves the utility model is adopted is:
The valve plate body of this double eccentric butterfly valve plate adopts the integral cast steel structure, contain axle bed and axle bed hole on this integral cast steel spare valve plate body, the axle bed hole is processed with keyway and top wire hole, be characterized in replacing former double eccentric butterfly valve plate by valve plate body, seal ring and trim ring combination structure by numerous fastening pieces binding one, directly establish sealing surface at this integral cast steel spare valve plate body periphery, and the heat-proof corrosion-resistant material that is suitable in the built-up welding of sealing surface position according to the applying working condition condition.
The heat-proof corrosion-resistant material of the set sealing surface of described integral cast steel spare valve plate body periphery position built-up welding is stainless steel or cemented carbide.
The utility model is simple in structure, makes easily, and is with low cost, the cost performance height, and using effect is good.Solved the problems that former double eccentric butterfly valve combined type valve plate exists, avoided the loaded down with trivial details of combined type valve plate installing/dismounting and trouble, the normal maintenance and the life cycle that have effectively prolonged double eccentric butterfly valve have reduced safety in production hidden danger.
Description of drawings
Fig. 1 is a plan view of the present invention;
Fig. 2 is a plan view of the present invention;
Fig. 3 is a butterfly plate plan view before improving;
Fig. 4 is a butterfly plate plan view before improving.
Embodiment
Introduce embodiments of the invention below in conjunction with accompanying drawing.
As depicted in figs. 1 and 2: this double eccentric butterfly valve plate comprises the valve plate body 4 of integral cast steel structure and the sealing surface 1 of periphery thereof, and contained axle bed 2 and axle bed hole 5 on the valve plate body 4, establishes keyway 3 in the axle bed hole 5, and the top wire hole 6 in order to the tightening axle is arranged.
Valve plate body 4 materials are selected low-carbon cast steel ZG230-450 for use.Eliminate casting residual stress annealing back at processing axle bed hole, axle bed 2 places 5, keyway 3 and top wire hole 6 at integral cast steel spare.
At integral cast steel spare sealing surface position built-up welding stainless steel or cemented carbide, stainless steel can adopt 1Cr18Ni9Ti according to applying working condition, and cemented carbide can adopt ZD5.
This double eccentric butterfly valve plate structure has replaced Fig. 3, former double eccentric butterfly valve plate shown in Figure 4 by valve plate body 4, seal ring 7 and the trim ring 9 combinations structure by numerous fastening pieces 8 binding one.
Claims (5)
1. double eccentric butterfly valve plate, it comprises the valve plate body, contains axle bed and axle bed hole on the valve plate body, the axle bed hole is processed with keyway and top wire hole, it is characterized in that: the valve plate body is an integral cast steel spare, and its periphery is established sealing surface, and the built-up welding of sealing surface position has the heat-proof corrosion-resistant material.
2. double eccentric butterfly valve plate according to claim 1 is characterized in that: the position built-up welding of the set sealing surface of described valve plate body periphery has stainless steel.
3. double eccentric butterfly valve plate according to claim 2 is characterized in that: the stainless steel of described valve plate body peripheral sealing surface position built-up welding adopts 1Cr18Ni9Ti.
4. double eccentric butterfly valve plate according to claim 1 is characterized in that, the position built-up welding of the set sealing surface of described valve plate body periphery has cemented carbide.
5. double eccentric butterfly valve plate according to claim 4 is characterized in that: the cemented carbide of described valve plate body peripheral sealing surface position built-up welding adopts ZD5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202208540U CN201293109Y (en) | 2008-11-11 | 2008-11-11 | Double eccentric butterfly valve plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202208540U CN201293109Y (en) | 2008-11-11 | 2008-11-11 | Double eccentric butterfly valve plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201293109Y true CN201293109Y (en) | 2009-08-19 |
Family
ID=41006586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202208540U Expired - Fee Related CN201293109Y (en) | 2008-11-11 | 2008-11-11 | Double eccentric butterfly valve plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201293109Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022550B (en) * | 2009-09-10 | 2012-05-09 | 江南阀门有限公司 | Double-sealing structure of piston type axial flow valve |
| CN106641284A (en) * | 2015-10-28 | 2017-05-10 | 江苏海达船用阀业有限公司 | High-temperature-resistant double eccentric butterfly valve |
-
2008
- 2008-11-11 CN CNU2008202208540U patent/CN201293109Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022550B (en) * | 2009-09-10 | 2012-05-09 | 江南阀门有限公司 | Double-sealing structure of piston type axial flow valve |
| CN106641284A (en) * | 2015-10-28 | 2017-05-10 | 江苏海达船用阀业有限公司 | High-temperature-resistant double eccentric butterfly valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20091211 |