CN110578805A - adjusting valve for high-pressure main steam bypass of waste heat boiler - Google Patents
adjusting valve for high-pressure main steam bypass of waste heat boiler Download PDFInfo
- Publication number
- CN110578805A CN110578805A CN201810589363.1A CN201810589363A CN110578805A CN 110578805 A CN110578805 A CN 110578805A CN 201810589363 A CN201810589363 A CN 201810589363A CN 110578805 A CN110578805 A CN 110578805A
- Authority
- CN
- China
- Prior art keywords
- valve seat
- valve
- air inlet
- fixed valve
- adjusting
- 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.)
- Pending
Links
- 239000002918 waste heat Substances 0.000 title claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 229910001347 Stellite Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 3
- 238000012423 maintenance Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
Abstract
the invention discloses a regulating valve for a high-pressure main steam bypass of a waste heat boiler, which comprises: the valve comprises a valve body, wherein an air inlet and an air outlet communicated with the air inlet are formed in the valve body, a fixed valve seat is welded at the joint of the air inlet and the air outlet, an adjusting valve seat is arranged in the valve body and is positioned above the fixed valve seat, an adjusting valve core and an adjusting valve rod are both arranged in the adjusting valve seat, the adjusting valve core is connected to the lower end of the adjusting valve rod and is used for closing or opening the fixed valve seat to realize the closing or the communication between the air inlet and the air outlet, the fixed valve seat is arranged at the joint of the air inlet and the air outlet through a detachable structure and tightly; a pressure balance hole is formed in the adjusting valve rod, a drain hole is formed in the upper end of the adjusting valve rod, and the drain hole is communicated with the pressure balance hole. The invention not only can be convenient for replacing and maintaining the fixed valve seat on site, but also can prolong the service life of the fixed valve seat.
Description
Technical Field
The invention relates to a steam regulating valve, in particular to a regulating valve for a high-pressure main steam bypass of a waste heat boiler.
background
The steam regulating valve is a valve widely applied to the field of steam engineering, and the main function of the steam regulating valve is to regulate the steam flow passing through the valve, so that the requirements of steam equipment on different steam flows under different working states are met.
The structure of the steam regulating valve is similar, the main structure comprises a valve body, a fixed valve seat, a regulating valve core and a regulating valve rod, the regulating valve core is usually arranged in the regulating valve seat in a sliding mode, and the position of the regulating valve core in the regulating valve seat is changed through the regulating valve rod to control the flow of steam.
as shown in fig. 1, when the valve is opened, the flow direction of the steam medium in the valve is the flow closing direction, i.e. the steam medium flows out from the side and goes out from the bottom, so that the valve internals are affected by the wet steam, and particularly, the sealing surfaces of the regulating valve core (located in the special-shaped cage 2, not shown in fig. 1) and the fixed valve seat 1 are eroded and damaged by the wet steam, so that the steam outlet forms initial leakage after the valve is closed, and the severity of the damage is aggravated by the progress of high-speed steam flow generated by the leakage. Because the medium flow direction is the flow direction of closing, when the valve is at little aperture, steam at first through the trompil outside-in high-speed blowout on the special-shaped cage cover 2, the sealed face of fixed valve seat 1 receives the impact at first, if contain moisture in the steam, then the sealed face of fixed valve seat 1 will be impaired after long-time. However, since the fixed valve seat 1 and the valve body 3 are connected by welding, only field repair can be performed, which brings great difficulty to repair work and makes it difficult to obtain ideal effects.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the regulating valve for the high-pressure main steam bypass of the waste heat boiler, which not only can facilitate the replacement and maintenance of the fixed valve seat on site, but also can prolong the service life of the fixed valve seat.
In order to achieve the purpose, the invention adopts the following technical scheme:
A regulating valve for a high pressure main steam bypass of a waste heat boiler, comprising: the valve body is internally provided with an air inlet and an air outlet communicated with the air inlet, the joint of the air inlet and the air outlet is welded with a fixed valve seat, an adjusting valve seat is arranged in the valve body and is positioned above the fixed valve seat, an adjusting valve core and an adjusting valve rod are both arranged in the adjusting valve seat, the adjusting valve core is connected with the lower end of the adjusting valve rod and is used for closing or opening the fixed valve seat to realize the closing or the communication between the air inlet and the air outlet,
the fixed valve seat is arranged at the joint of the air inlet and the air outlet through a detachable structure, and the fixed valve seat is tightly pressed through the valve cover;
The detachable structure is as follows: the outer side of the fixed valve seat is arranged in a step shape, and the inner wall of the joint of the air inlet and the air outlet in the valve body is also provided with a step shape matched with the step shape on the outer side of the fixed valve seat;
a pressure sealing strip is arranged at a gap between the outer side of the fixed valve seat and the inner wall of the joint of the air inlet and the air outlet;
A pressure balance hole is formed in the adjusting valve rod, a drain hole is formed in the upper end of the adjusting valve rod, and the drain hole is communicated with the pressure balance hole.
And a graphite gasket is arranged between the valve cover and the fixed valve seat.
The adjusting valve core and the fixed valve seat are both made of stellite alloy materials.
The regulating valve core is provided with a circulation hole.
The circulation hole is communicated with the pressure balance hole.
In the technical scheme, the regulating valve for the high-pressure main steam bypass of the waste heat boiler provided by the invention also has the following beneficial effects:
1) The invention removes the special-shaped cage cover between the original regulating valve core and the fixed valve seat, thereby avoiding the erosion of the high-speed wet steam flow to the sealing surface of the fixed valve seat through the opening on the special-shaped cage cover and relieving the initial damage of the sealing surface of the fixed valve seat;
2) The fixed valve seat is improved into a detachable structure, so that the maintenance and the replacement are convenient, and meanwhile, the valve cover is tightly pressed on the fixed valve seat through the graphite gasket, so that the thermal expansion of the valve cover and the fixed valve seat can be absorbed;
3) The adjusting valve core and the fixed valve seat are made of stellite alloy materials, so that the hardness of parts is enhanced, the adjusting valve core and the fixed valve seat are suitable for frequently changing working conditions, and the service lives of the adjusting valve core and the fixed valve seat are prolonged.
drawings
FIG. 1 is a schematic diagram of a prior art regulator valve;
FIG. 2 is a schematic diagram of the regulator valve of the present invention;
Fig. 3 is an enlarged schematic view of the position a in fig. 2.
Detailed Description
the technical scheme of the invention is further explained by combining the drawings and the embodiment.
Referring to fig. 2 to 3, the regulating valve for a high-pressure main steam bypass of a waste heat boiler according to the present invention includes: the valve body 4, set up air inlet 5 in the valve body 4, and the gas outlet 6 with air inlet 5 intercommunication, the welding has fixed disk seat 7 on the air inlet 5 and the gas outlet 6 junction, adjust disk seat 8 locates in the valve body 4, and be located the top of fixed disk seat 7, adjust valve core 9 and adjusting valve rod 10 all locate in adjusting disk seat 8, adjust valve core 9 links to the lower extreme of adjusting valve rod 10, adjust valve core 9 is used for sealing or opening fixed disk seat 7, realize the closure or the intercommunication between air inlet 5 and the gas outlet 6, the aforesaid is prior art part, just need not be repeated here. Different from the prior art:
preferably, the fixed valve seat 7 is detachably disposed at a joint of the air inlet 5 and the air outlet 6, and the fixed valve seat 7 is pressed by the valve cover 11.
Preferably, the detachable structure is: the outer side of the fixed valve seat 7 is arranged in a step shape, and the inner wall of the joint of the air inlet 5 and the air outlet 6 in the valve body 4 is also arranged in a step shape matched with the step shape on the outer side of the fixed valve seat 7; due to the adoption of the detachable structure, after a special tool for detaching and installing the fixed valve seat 7 is configured, the fixed valve seat 7 can be rapidly detached and assembled, so that the fixed valve seat can be conveniently taken out for maintenance or replacement, the maintenance time is saved, and the maintenance cost is reduced.
preferably, a pressure sealing strip 12 is arranged at a gap between the outer side of the fixed valve seat 7 and the inner wall of the joint of the air inlet 5 and the air outlet 6, and the pressure sealing strip 12 can be pre-compressed when the regulating valve is assembled;
Preferably, a graphite gasket 13 is further disposed between the valve cover 11 and the fixed valve seat 7, and the valve cover 11 tightly presses the fixed valve seat 7 through the graphite gasket 13, so as to absorb thermal expansion of the valve cover 11 and the fixed valve seat 7.
Preferably, the adjusting valve element 9 and the fixed valve seat 10 are both made of stellite alloy, have higher hardness while keeping good weldability, so that the hardness reaches 430-580 HV, are suitable for frequently changing working conditions, have higher erosion resistance to the working conditions that saturated steam or wet steam flows through the valve, and prolong the service life of the adjusting valve element 9 and the fixed valve seat 10.
Preferably, a pressure balance hole 14 is formed in the adjusting valve rod 10, a drain hole 15 is formed in the upper end of the adjusting valve rod 10, the drain hole 15 is communicated with the pressure balance hole 14, a flow hole 16 is formed in the adjusting valve core 9, and the flow hole 16 is communicated with the pressure balance hole 14. When steam enters the fit clearance between the adjusting valve core 9 and the fixed valve seat 7, part of the steam can pass through the pressure balance hole 14 from the circulation hole 16 and then is led out from the drain hole 15, and the problems that the adjusting valve core 9 is rusted and the sliding of the adjusting valve core 9 is influenced because the steam enters the fit clearance between the adjusting valve core 9 and the fixed valve seat 7 are solved.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (5)
1. a regulating valve for a high pressure main steam bypass of a waste heat boiler, comprising: the valve body, seted up the air inlet in the valve body, and the gas outlet that communicates with the air inlet, the welding has the solid fixed valve seat on air inlet and the gas outlet junction, adjust the disk seat and locate in the valve body to be located solid fixed valve seat's top, adjust case and adjusting valve rod and all locate in adjusting the disk seat, adjust the case and link in adjusting valve rod's lower extreme, adjust the case and be used for sealing or open solid fixed valve seat, realize the closure or the intercommunication between air inlet and the gas outlet, its characterized in that:
The fixed valve seat is arranged at the joint of the air inlet and the air outlet through a detachable structure, and the fixed valve seat is tightly pressed through the valve cover;
The detachable structure is as follows: the outer side of the fixed valve seat is arranged in a step shape, and the inner wall of the joint of the air inlet and the air outlet in the valve body is also provided with a step shape matched with the step shape on the outer side of the fixed valve seat;
a pressure sealing strip is arranged at a gap between the outer side of the fixed valve seat and the inner wall of the joint of the air inlet and the air outlet;
A pressure balance hole is formed in the adjusting valve rod, a drain hole is formed in the upper end of the adjusting valve rod, and the drain hole is communicated with the pressure balance hole.
2. The regulating valve for the high-pressure main steam bypass of the waste heat boiler as claimed in claim 1, characterized in that: and a graphite gasket is arranged between the valve cover and the fixed valve seat.
3. The regulating valve for the high-pressure main steam bypass of the waste heat boiler as claimed in claim 1, characterized in that: the adjusting valve core and the fixed valve seat are both made of stellite alloy materials.
4. the regulating valve for the high-pressure main steam bypass of the waste heat boiler as claimed in claim 1, characterized in that: the regulating valve core is provided with a circulation hole.
5. The regulating valve for the high-pressure main steam bypass of the waste heat boiler as claimed in claim 4, characterized in that: the circulation hole is communicated with the pressure balance hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810589363.1A CN110578805A (en) | 2018-06-08 | 2018-06-08 | adjusting valve for high-pressure main steam bypass of waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810589363.1A CN110578805A (en) | 2018-06-08 | 2018-06-08 | adjusting valve for high-pressure main steam bypass of waste heat boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110578805A true CN110578805A (en) | 2019-12-17 |
Family
ID=68808905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810589363.1A Pending CN110578805A (en) | 2018-06-08 | 2018-06-08 | adjusting valve for high-pressure main steam bypass of waste heat boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110578805A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2163278Y (en) * | 1993-05-22 | 1994-04-27 | 赵星亮 | Disk-like steam stop valve |
| JP2009085201A (en) * | 2007-10-03 | 2009-04-23 | Toshiba Corp | Steam valve and generator set |
| JP2011122503A (en) * | 2009-12-10 | 2011-06-23 | Toshiba Corp | Steam valve and shaft seal device |
| CN103090042A (en) * | 2013-02-03 | 2013-05-08 | 西麦克阀门制造有限公司 | Ball valve |
| CN104633692A (en) * | 2015-01-07 | 2015-05-20 | 西安西热锅炉环保工程有限公司 | System and method for clearing powder deposits in pulverized coal bunkers using adjacent boiler negative pressure |
| CN104948746A (en) * | 2014-03-31 | 2015-09-30 | 株式会社东芝 | Steam valve |
| CN105247171A (en) * | 2014-02-19 | 2016-01-13 | 三菱重工压缩机有限公司 | Vapor valve and vapor turbine |
| CN105443791A (en) * | 2015-12-10 | 2016-03-30 | 武汉船用机械有限责任公司 | Steam adjustment valve |
| CN205226501U (en) * | 2015-11-18 | 2016-05-11 | 上海漕泾热电有限责任公司 | Formula of relying on oneself relief pressure valve |
| CN206770631U (en) * | 2017-02-28 | 2017-12-19 | 中国电建集团上海能源装备有限公司 | A kind of valve sealing face for being applied to more than 600 DEG C steam mediums |
| CN207349468U (en) * | 2017-08-29 | 2018-05-11 | 四川固特阀门制造有限公司 | Inverse formula opens and closes cut-out cock |
| CN208295156U (en) * | 2018-06-08 | 2018-12-28 | 上海漕泾热电有限责任公司 | A kind of control valve for the bypass of waste heat boiler high pressure main steam |
-
2018
- 2018-06-08 CN CN201810589363.1A patent/CN110578805A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2163278Y (en) * | 1993-05-22 | 1994-04-27 | 赵星亮 | Disk-like steam stop valve |
| JP2009085201A (en) * | 2007-10-03 | 2009-04-23 | Toshiba Corp | Steam valve and generator set |
| JP2011122503A (en) * | 2009-12-10 | 2011-06-23 | Toshiba Corp | Steam valve and shaft seal device |
| CN103090042A (en) * | 2013-02-03 | 2013-05-08 | 西麦克阀门制造有限公司 | Ball valve |
| CN105247171A (en) * | 2014-02-19 | 2016-01-13 | 三菱重工压缩机有限公司 | Vapor valve and vapor turbine |
| CN104948746A (en) * | 2014-03-31 | 2015-09-30 | 株式会社东芝 | Steam valve |
| CN104633692A (en) * | 2015-01-07 | 2015-05-20 | 西安西热锅炉环保工程有限公司 | System and method for clearing powder deposits in pulverized coal bunkers using adjacent boiler negative pressure |
| CN205226501U (en) * | 2015-11-18 | 2016-05-11 | 上海漕泾热电有限责任公司 | Formula of relying on oneself relief pressure valve |
| CN105443791A (en) * | 2015-12-10 | 2016-03-30 | 武汉船用机械有限责任公司 | Steam adjustment valve |
| CN206770631U (en) * | 2017-02-28 | 2017-12-19 | 中国电建集团上海能源装备有限公司 | A kind of valve sealing face for being applied to more than 600 DEG C steam mediums |
| CN207349468U (en) * | 2017-08-29 | 2018-05-11 | 四川固特阀门制造有限公司 | Inverse formula opens and closes cut-out cock |
| CN208295156U (en) * | 2018-06-08 | 2018-12-28 | 上海漕泾热电有限责任公司 | A kind of control valve for the bypass of waste heat boiler high pressure main steam |
Non-Patent Citations (1)
| Title |
|---|
| 胡继栋: "稠油热采注蒸汽用高压闸阀", 阀门, no. 01, pages 8 - 11 * |
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