CN102287541A - Sealing structure of connecting rod type cutting butterfly valve of blast furnace - Google Patents
Sealing structure of connecting rod type cutting butterfly valve of blast furnace Download PDFInfo
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- CN102287541A CN102287541A CN2011102068202A CN201110206820A CN102287541A CN 102287541 A CN102287541 A CN 102287541A CN 2011102068202 A CN2011102068202 A CN 2011102068202A CN 201110206820 A CN201110206820 A CN 201110206820A CN 102287541 A CN102287541 A CN 102287541A
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Abstract
The invention discloses a sealing structure of a connecting rod type cutting butterfly valve of a blast furnace, relating to a valve body and a butterfly plate of the cutting butterfly valve. The sealing structure is mainly formed through special processing of contact end faces of a valve seat of the valve body and the butterfly plate. The contact end face of the valve seat on the inner wall of the valve body or a groove processed on the contact end face is processed and ground into a sealing plane after surfacing welding or spray welding of martensitic or austenitic stainless steel. The contact end face of the butterfly plate corresponding to the valve seat or a groove processed on the corresponding contact end face is processed and ground into a sealing inner conical pore surface after surfacing welding or spray welding of austenitic stainless steel or martensitic stainless steel with the appropriate hardness. The sealing contact of the sealing plane of the valve seat of the valve body and the sealing inner conical pore surface of the butterfly plate is tighter than the sealing contact of pure planes, certain elastic deformation can be caused to the two sealing surfaces under pressure, and a better sealing performance can be achieved. The sealing structure is simple and applicable and has a reliable performance, the service life of the cutting butterfly valve can be prolonged, and the sealing structure can adapt to the work condition of cutting of medium-temperature and low-temperature mediums of an iron making system of the blast furnace.
Description
Technical field
The present invention relates to the blast furnace linkage type cut-off valve that blast furnace process is used, particularly a kind of blast furnace linkage type cuts off the sealing configuration of butterfly valve.
Background technique
In the blast furnace hot blast stove system, use a large amount of blast furnace linkage type cut-off valves,, be characterized in that volume is little as cold blast sliding valve, combustion-supporting air cut-off valve, gas stop valve and chimney valve etc., in light weight.Because the butterfly plate sealing surface and the sealing surface of seat of current domestic and international blast furnace linkage type cut-off valve are plane structure, during work after the butterfly plate pressure-bearing sealing surface can produce warpage, cause the sealing surface bad connection, influence sealing effect, occur easily between butterfly plate sealing surface and sealing surface of seat leaking promptly usually said interior leakage phenomenon.Occur leaking, the butterfly valve normal running is cut off in influence, causes blast furnace process can't carry out normal operation.
Summary of the invention
The present invention is intended to solve the sealing technique problem that blast furnace linkage type cut-off valve exists, and provides that a kind of sealing is tight, reliable performance, obvious results blast furnace linkage type cut-out butterfly valve seal structure.
The technical solution adopted in the present invention is:
This blast furnace linkage type cuts off butterfly valve seal structure, relates to the valve body and the butterfly plate that cut off butterfly valve, and the two the end face that contacts of main valve seat and butterfly plate outer by valve body forms after special processing.The valve seat contact end face of described valve body is a sealing plane, and the corresponding contact end face of described butterfly plate and described valve seat is a female cone hole face.
The valve seat contact end face of described valve interior wall is through built-up welding or surfacing martensite type stainless steel or Austenitic stainless steel and the sealing plane that forms after processing grinding.Also can form sealing plane through built-up welding or surfacing martensite type stainless steel or Austenitic stainless steel and after processing grinding at the groove of this valve seat end face processing.
The corresponding contact end face of described butterfly plate and described valve seat is a formed sealing female cone hole face after selecting Austenitic stainless steel or the built-up welding of martensite type stainless steel or the surfacing of the moderate material of hardness for use and processing grinding.Also can the groove of this butterfly plate corresponding end-faces processing through selecting the moderate material of hardness for use Austenitic stainless steel or built-up welding of martensite type stainless steel or surfacing and process grinding after institute form the female cone hole face that seals.
The hardness number of described butterfly plate sealing surface is low than the hardness number of sealing surface of seat, and butterfly plate sealing surface hardness number is about 1:1.1-3 with the ratio of sealing surface of seat hardness number.
The sealing female cone hole face of the sealing plane of valve body and valve seat and butterfly plate contacts tightly than pure flat face seal, it when the two sealing surface does not have pressure the line contact, its inner conical surface can produce a certain amount of resiliently deformable after the butterfly plate pressure-bearing, makes the two sealing surface be the face contact, and sealability is better.
This blast furnace linkage type cuts off the butterfly valve seal structure improves valve seat and the butterfly plate outer contact jaw face seal performance of cutting off butterfly valve body, and sealing is simple in structure to be suitable for, reliable performance can prolong the working life of cutting off butterfly valve, can adapt to cryogenic media cut-out operating mode in the system for blast furnace ironmaking.
Description of drawings
Fig. 1 cuts off the butterfly valve seal structural representation for the blast furnace linkage type;
Fig. 2 cuts off butterfly valve seal structure B portion enlarged view for the blast furnace linkage type.
Embodiment
Introduce embodiments of the invention below in conjunction with accompanying drawing.
As shown in Figure 1, this blast furnace linkage type cuts off the butterfly valve seal structure, relates to the butterfly plate 1 and the valve body 2 that cut off butterfly valve, the end face that contacts of the valve seat 2-1 of valve body 2 inwalls and butterfly plate 1 outer, and these two contact end faces form sealing surface after special processing.
From Fig. 2 B portion enlarged view as can be seen, the contact end face of valve body 2 inwall valve seat 2-1 is that built-up welding or surfacing martensite type stainless steel or Austenitic stainless steel have formed sealing plane 2-3 after grinding in the groove 2-2 of this valve seat 2-1 end face processing.
The corresponding contact end face of butterfly plate 1 and valve seat 2-1 is in the groove 1-1 of this butterfly plate 1 outer corresponding end-faces processing, built-up welding or surfacing Austenitic stainless steel or martensite type stainless steel, and formed sealing female cone hole face 1-2 after the grinding.
The hardness number of butterfly plate 1 sealing surface is lower than the hardness number of valve seat 2 sealing surfaces, and butterfly plate sealing surface hardness number and sealing surface of seat hardness number approximately keep the ratio of 1:1.1-3.
In actual applications, when the blast furnace linkage type cuts off butterfly valve in off position the time, the sealing effect of the sealing female cone hole face 1-2 of the sealing plane 2-3 of valve body and valve seat 2-1 and butterfly plate is better than pure flat face seal, can not produce the gap, when the sealing surface pressure-bearing, can produce a certain amount of resiliently deformable, sealing surface is contacted tightly more.Can not produce leakage, can guarantee that the blast furnace process operation normally carries out.
Adopt the linkage type of sealing structure to cut off butterfly valve, through actual sealing test, its leak-down rate reduces greatly than the connecting rod cut-off valve of the hard sealing surface of existing structure.
Claims (6)
1. a blast furnace linkage type cuts off the butterfly valve seal structure, it is characterized in that: the sealing structure is mainly formed after processing by the two the end face that contacts of the valve seat and butterfly plate outer of valve body, the valve seat contact end face of described valve body is the plane, and the corresponding contact end face of described butterfly plate and described valve seat is a female cone hole face.
2. blast furnace linkage type according to claim 1 cuts off the butterfly valve seal structure, and it is characterized in that: the contact end face of described valve interior wall valve seat is through built-up welding or surfacing martensite type stainless steel or Austenitic stainless steel and the sealing plane that forms after processing grinding.
3. blast furnace linkage type according to claim 1 cuts off the butterfly valve seal structure, it is characterized in that: the valve seat contact end face of described valve interior wall is that groove at this valve seat end face is through built-up welding or surfacing martensite type stainless steel or Austenitic stainless steel and the sealing plane that forms after processing grinding.
4. blast furnace linkage type according to claim 1 cuts off the butterfly valve seal structure, it is characterized in that: the corresponding contact end face of described butterfly plate and described valve seat is a formed sealing female cone hole face after selecting Austenitic stainless steel or built-up welding of martensite type stainless steel or surfacing for use and processing grinding.
5. blast furnace linkage type according to claim 1 cuts off the butterfly valve seal structure, it is characterized in that: the corresponding contact end face of described butterfly plate and described valve seat is groove formed sealing female cone hole face after selecting Austenitic stainless steel or the built-up welding of martensite type stainless steel or surfacing for use and processing grinding of this butterfly plate corresponding end-faces.
6. blast furnace linkage type according to claim 1 cuts off the butterfly valve seal structure, and it is characterized in that: described butterfly plate sealing surface hardness number is 1:1.1-3 with the ratio of sealing surface of seat hardness number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102068202A CN102287541A (en) | 2011-07-22 | 2011-07-22 | Sealing structure of connecting rod type cutting butterfly valve of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102068202A CN102287541A (en) | 2011-07-22 | 2011-07-22 | Sealing structure of connecting rod type cutting butterfly valve of blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102287541A true CN102287541A (en) | 2011-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102068202A Pending CN102287541A (en) | 2011-07-22 | 2011-07-22 | Sealing structure of connecting rod type cutting butterfly valve of blast furnace |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2207486Y (en) * | 1994-12-26 | 1995-09-13 | 盛俊 | Conical sealing stop valve for chlorine alkali |
| CN2416289Y (en) * | 2000-01-20 | 2001-01-24 | 南通市明江阀门总厂 | Special valve for liquid caustic soda |
| CN2489130Y (en) * | 2001-07-03 | 2002-05-01 | 韩育礼 | Booster hydraulic rotary change valve coupling piece |
| CN2746215Y (en) * | 2004-12-09 | 2005-12-14 | 秦皇岛冶金机械有限公司 | Three-rod cut-off butterfly valve |
| CN2746216Y (en) * | 2004-12-09 | 2005-12-14 | 秦皇岛冶金机械有限公司 | Two-rod cut-off butterfly valve |
| CN2830809Y (en) * | 2005-10-28 | 2006-10-25 | 世林（漯河）冶金设备有限公司 | Lever type cut-off butterfly valve |
| CN101509557A (en) * | 2009-03-30 | 2009-08-19 | 铁岭阀门(集团)特种阀门有限责任公司 | Build-up welding sealing ring cast-iron butterfly valve and method for manufacturing same |
| CN201844037U (en) * | 2010-10-09 | 2011-05-25 | 天津津通瓦特斯阀门制造有限公司 | Metal sealing butterfly valve |
-
2011
- 2011-07-22 CN CN2011102068202A patent/CN102287541A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2207486Y (en) * | 1994-12-26 | 1995-09-13 | 盛俊 | Conical sealing stop valve for chlorine alkali |
| CN2416289Y (en) * | 2000-01-20 | 2001-01-24 | 南通市明江阀门总厂 | Special valve for liquid caustic soda |
| CN2489130Y (en) * | 2001-07-03 | 2002-05-01 | 韩育礼 | Booster hydraulic rotary change valve coupling piece |
| CN2746215Y (en) * | 2004-12-09 | 2005-12-14 | 秦皇岛冶金机械有限公司 | Three-rod cut-off butterfly valve |
| CN2746216Y (en) * | 2004-12-09 | 2005-12-14 | 秦皇岛冶金机械有限公司 | Two-rod cut-off butterfly valve |
| CN2830809Y (en) * | 2005-10-28 | 2006-10-25 | 世林（漯河）冶金设备有限公司 | Lever type cut-off butterfly valve |
| CN101509557A (en) * | 2009-03-30 | 2009-08-19 | 铁岭阀门(集团)特种阀门有限责任公司 | Build-up welding sealing ring cast-iron butterfly valve and method for manufacturing same |
| CN201844037U (en) * | 2010-10-09 | 2011-05-25 | 天津津通瓦特斯阀门制造有限公司 | Metal sealing butterfly valve |
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Application publication date: 20111221 |