CN104964048B - Anti-locking high-temperature seal butterfly valve - Google Patents
Anti-locking high-temperature seal butterfly valve Download PDFInfo
- Publication number
- CN104964048B CN104964048B CN201510428076.9A CN201510428076A CN104964048B CN 104964048 B CN104964048 B CN 104964048B CN 201510428076 A CN201510428076 A CN 201510428076A CN 104964048 B CN104964048 B CN 104964048B
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- valve
- valve body
- ring
- temperature
- seals
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Classifications
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- 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
- F16K1/16—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 with pivoted closure-members
- F16K1/18—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 with pivoted closure-members with pivoted discs or flaps
- F16K1/22—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 with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2263—Shaping or arrangements of the sealing the sealing being arranged on the valve seat
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- 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
- F16K1/16—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 with pivoted closure-members
- F16K1/18—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 with pivoted closure-members with pivoted discs or flaps
- F16K1/22—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 with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2261—Shaping or arrangements of the sealing the sealing being arranged on the valve member
-
- 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
- F16K27/0218—Butterfly valves
Abstract
The invention provides an anti-locking high-temperature seal butterfly valve and belongs to the technical field of seal butterfly valves. The anti-locking high-temperature seal butterfly valve is used for preventing the occurrence of high-temperature locking fault of a seal valve. According to the technical scheme, a valve body seal ring of the seal butterfly valve is located on the inner side of a valve body supporting seat, a plurality of locking bolts are arranged on the periphery of the valve body seal ring in the horizontal direction and connected with the valve body supporting seat, the contacting face between the valve body supporting seat and the valve body seal ring is provided with a directional pin, the directional pin is arranged in the diameter direction of the valve body seal ring, and a gap of 2-3 mm is formed between the outer circumferential face of the valve body seal ring and the inner circumferential face of the valve body seal ring. By means of the anti-locking high-temperature seal butterfly valve, the limitation of the temperature changes of the valve body on the dilatation of the valve body seal ring is eliminated, the influence of temperature rise dilatation on the valve sealing pair junction surface is also eliminated, the locking phenomenon of the seal butterfly valve is avoided, and meanwhile the valve can be in a good sealing state all the time. The anti-locking high-temperature seal butterfly valve has the advantages that the structure is simple, the design is reasonable, the problem that the fault of locking occurrence of the high-temperature seal butterfly valve in high-temperature working conditions is not solved for a long time is solved, and the economic benefit of enterprises is remarkably improved.
Description
Technical field
The present invention relates to the sealed butterfly valve used in a kind of blast furnace dust and gas system, belong to sealed butterfly valve technical field.
Background technology
Sealed butterfly valve is the visual plant in blast furnace dust and gas system, and in use, the metal near blast furnace one end is close
Often there is high temperature locking failure in sealing butterfly valve, have become the hard nut to crack of influence production.Once there is hot locking in valve,
Just necessary blowing out cooling, valve when system temperature is down near ambient temperature, could be opened and resumed production.Often there is once heat to embrace
Extremely, will all cause the damping down of more than one hundred million units to lose, have a strong impact on the economic benefit of enterprise.
Sealed butterfly valve produces warm locking phenomenon high, is that the material of traditional hard sealing metal butterfly valve is made with structure composition factor
Into.For the sealing for adapting to sealed butterfly valve, the performance requirement such as wear-resisting, anti-oxidant, it is all stainless from high-quality that valve seal is secondary
Steel makes, and valve body is to use carbon constructional quality steel.When this kind of valve is arranged on nearly stove end blast furnace gas pipeline system, temperature
When being raised to nearly 350 DEG C and the above, the different coefficients of expansion of unlike material just generate differential expansion.Due to existing sealed butterfly valve
Structure in, the valve seals of sealed butterfly valve and valve body are to be rigidly connected, i.e., two Member Weldings are integral.Valve seals
And valve plate sealing ring selects high-quality stainless steel（1Cr18Ni9Ti）, and valve body and valve plate body are from Q235 high-quality carbons
Structural steel, the two coefficient of expansion is different, in temperature when 20 DEG C are raised to 350 DEG C, 1Cr18Ni9Ti expansion rates 17.4 × 10-6/ DEG C,
Carbon steel（12.5~13.7）×10-6/ DEG C, it is 33% that its temperature rise expansion rate difference is near.The swell increment of stainless steel coil is produced more than valve body
Raw swell increment, is limited by valve body rigid structure, it is impossible to expanded outwardly by itself geometric shape, in the expansion that valve body is limited
In the range of only towards interior to breathing, and valve plate sealing ring is expanded outwardly and just generate that superposition is closely sealed, and this superposition is closely sealed similar
One chock makes valve open difficulty in the middle of sealing pair, that is, locking occurs.
By taking DN600 metal hard-sealing butterfly valves as an example, when pipeline is heated up by 20 DEG C reaches 350 DEG C, valve seal pair diameter
Be set as 580mm, valve plate sealing ring and valve seals all should according to 580 × 17.5 ×（350-20）℃×10-6=3.3mm, produces
Raw swell increment.And accept（Welding）The carbon steel body of valve seals be then according to 580 ×（12.5+13.7）/2×（350-20）
℃×10-6The swell increment of=2.5mm, limits freely expanding for sealing ring.Wherein the differential expansion of this 0.8mm is as a chock one
Sample encircles in the middle of sealing pair, forms three-level interference fit.Here it is the reason for producing hot locking to be formed.
At present, the failure that existing elevated-temperature seal butterfly valve occurs locking under worst hot case never has and is effectively solved
Certainly, being smoothed out generating and have a strong impact on to production, has not only upset the rhythm and continuity of production, is also brought to enterprise
Huge economic loss, therefore high temperature-proof locking valve is developed as problem demanding prompt solution.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of anti-lock elevated-temperature seal butterfly valve, and this sealed butterfly valve is avoided
Locking phenomenon of the sealed butterfly valve difference part caused by the different swell incremenies that material difference is produced, while valve can be made all the time
In good sealing state, it is ensured that normal operation switch of the valve in the range of design temperature rise.Domatic semi-ring and water conservancy diversion
Plate prevents pipeline dust from falling sealing surface, prevents sealing pair dust stratification from influenceing sealing.
Solving the technical scheme of above-mentioned technical problem is：
A kind of anti-lock elevated-temperature seal valve, it includes valve body, valve body fulcrum bearing, valve seals, valve plate sealing ring, valve
Plate, valve rod, transmission device, valve body fulcrum bearing are connected with valve body, and transmission device is connected with valve rod, and valve rod is connected with valve plate
Connect, its improvements is that valve seals are located at the inner side of valve body fulcrum bearing, there are multiple levels along the circumference of valve seals
The clamping screw in direction is connected with valve body fulcrum bearing, clamping screw perpendicular to valve seals circumferential plane, it is multiple elongated
Bolt unthreaded hole and clamping screw along valve seals circumference uniform distribution, the contact between valve body fulcrum bearing and valve seals
Have orienting pin on face, orienting pin along valve seals diametric(al), the outer circumference surface of valve seals and the inner circle of valve body
There are 2-3mm gaps between side face.
Above-mentioned anti-lock elevated-temperature seal valve, the valve plate sealing ring is welded as a whole with valve plate.
Domatic semi-ring is installed in above-mentioned anti-lock elevated-temperature seal valve, the bottom of the valve body, and it is close that domatic semi-ring is located at valve plate
The ventilating surface direction of seal ring, domatic semi-ring is made up of the 120 ° of annulus and guide ring perpendicular to valve interior wall, and the width of annulus is
30mm, the upper end of guide ring is connected with the upper end of annulus, and the lower end of guide ring is connected with valve interior wall, the anchor ring of guide ring
With the channelization angle that valve interior wall is in 20 ° -30 °.Domatic semi-ring prevents pipeline dust from falling sealing surface with deflector, prevents sealing pair
Dust stratification influence sealing.
The beneficial effects of the invention are as follows：
The attachment structure of valve seals and valve body is rigidly connected that to be changed to valve body close by the present invention by traditional welded type
Seal is connected with the hinge of the bolt locked of valve body fulcrum bearing, when valve seals is influenceed by temperature rise and is produced expansion, no
Limited by valve body, eliminated limitation of the valve body temperature change to valve seals breathing, also eliminated the secondary combination of valve seal
Face by temperature rise breathing influenceed, the leaching between sealing pair is closed under combination reset condition when being in normal temperature all the time, it is ensured that
Normal operation switch of the valve in the range of design temperature rise.Present invention, avoiding sealed butterfly valve difference part because of material difference
The locking phenomenon that the different swell incremenies of generation are caused, while valve can be made to be in good sealing state all the time.
It is simple structure of the present invention, reasonable in design, solve the failure that elevated-temperature seal butterfly valve occurs locking under worst hot case
The long-term problem not solved, enable production to be smoothed out, it is ensured that the rhythm and continuity of production, it is to avoid because of high temperature butterfly
Valve locking brings huge economic loss to enterprise, significantly improves the economic benefit of enterprise, in industry there is high pushing away
Wide value.
Brief description of the drawings
Fig. 1 is front view of the invention；
Fig. 2 is the A-A sectional views of Fig. 1；
Fig. 3 is the valve open mode schematic diagram of Fig. 2；
Fig. 4,5,6,7,8 are the schematic diagrams that slope panel prevents sealing pair from polluting.
Marked in figure as follows：Valve body 1, valve body fulcrum bearing 2, valve seals 3, clamping screw 4, valve plate sealing ring 5, valve plate
6, valve rod 7, transmission device 8, orienting pin 9, domatic semi-ring 10, deflector 11.
Specific embodiment
The present invention includes valve body 1, valve body fulcrum bearing 2, valve seals 3, valve plate sealing ring 5, valve plate 6, valve rod 7, transmission
Device 8, valve body fulcrum bearing 2 is connected with valve body 1, and transmission device 8 is connected with valve rod 7, and valve rod 7 is connected with valve plate 6, these
Structure is all prior art.
Fig. 1,2,3 show that the present invention changes the rigid connection structure of valve seals 3 and valve body 1, by valve seals
The 3 windward side direction sides for being positioned over valve body fulcrum bearing 2, are attached with clamping screw 4, and this attachment structure is in valve seal
When circle 3 is influenceed by temperature rise and produces expansion, the elongated bolt hole of sealing ring makes the unrestricted free to contract and expand of sealing ring, eliminates valve
Limitation of the door temperature change to the breathing of valve seals 3.
Fig. 1,2,3 show, clamping screw 4 for multiple, along valve seals 3 circumference in the horizontal direction with valve body branch
Bearing 2 is connected, clamping screw 4 perpendicular to valve seals 3 circumferential plane, multiple elongated bolt unthreaded holes and clamping screw 4
Along the circumference uniform distribution of valve seals 3.
Fig. 1,2,3 show, there is orienting pin 9 on the contact surface of valve body fulcrum bearing 2 and valve seals 3, orienting pin 9 along
The radial direction of valve seals 3 makes.The effect of orienting pin is the stability for ensureing valve seals 3 in making and use, while
To the temperature distortion of stainless steel sealing ring 3 with free to contract and expand space.The outer circumference surface of valve seals and the inner peripheral surface of valve body it
Between have 2-3mm gaps, with ensure the temperature influence of valve seals 3 produce breathing variable without being interfered.
Fig. 1,2,3 show that valve plate sealing ring 5 is welded as a whole with valve plate 6, it is ensured that valve acutating gear 8 pass through valve rod 7,
Valve plate 6 drives valve plate sealing ring 5 to realize the open and close function of valve.
Fig. 1,2,3 show that domatic semi-ring 10 is installed in the bottom of valve body 1, and domatic semi-ring 10 is located at the ventilation of valve plate sealing ring 5
Face direction, domatic semi-ring 10 is made up of annulus and guide ring, and annulus is semicircular ring perpendicular to the inwall of valve body 1, annulus, and semicircle is
120 ° of radians, the width of annulus is 30mm, and the upper end of guide ring is connected with the upper end of annulus, lower end and the valve body 1 of guide ring
Inwall is connected, and the anchor ring of guide ring, in 30 ° of channelization angle, also has with the inwall of valve body 1 in the ventilating surface direction of domatic semi-ring 10
Deflector 11.
This structure can greatly reduce dust and gas to sealing pair pollution problem.Concrete reason is, in blast furnace raw gas system
The dust and gas content discharged with pipeline has various uncontrollable compositions, it is impossible to enter cleaner with dust and gas, and midway occurs
Fall, most fearful is once having steam to flow into, these particles of not accompanying, the chance fallen at any time is greatly increased.If fallen
On valve sealing face, these stickum long time integrations will make valve to close and open.The system is set normally to transport
Turn.
According to the parameter that user provides, through analysis, these unstable particles can be forced to cross valve plus associated components
Sealing surface, falls beyond controlled range.
The furnace parameters high of one embodiment are：Pipeline drift diameter DN600mm, pipeline pressure 0.25MPa, pipeline dust and gas flow velocity
10m/s。
Fig. 4,5,6,7,8 show that domatic semi-ring 10 prevents the principle that sealing pair pollutes as follows：
Irregular shape dust and gas particle issuable buoyancy effect in the gas flow is excluded, limit gravity is fallen with proton
Acceleration G=9.8m/s2It is that parameter value, then air velocity and particulate fall parabolic velocity vector triangle Δ OAB.
OA=10m/s,AB=1/2GT2The vertical distance of falling that=4.9m/s, AB are in pipeline 10m segment limits is not accompanied
Material falls speed, and dotted line OB is and falls parabolic path, and B points are drop point, at the same also form be the 1s time periods arrow
Measure △ O ' A ' B ', O ' the A '=10m, A ' B '=4.9m of triangle.Now install 30 ° of domatic semi-rings 10, particulate in control dust and gas additional
Fall.
And it is anti-pollution control zone that setting crosses valve sealing face to 200mm by the summit of domatic semi-ring 10, is set to PP`.
Dust and gas are still flowed through by the pipe flow speed of 10m/s, and this segment distance can reach anti-pollution control point with the time of 0.02s.PP` is dirt
The parabolic path that gas particles fall, its drop point is set to M, connects PM, then PM=1/2G × (0.02)2s2=1.96mm.In view of life
Change in flow and damping down speed reduction influence in product.Another comprehensive flow velocity 2m/s is set, then the time that dust and gas flow through pipeline is
0.1s, then the vertical range of falling of its parabolic track is 1/2G × (0.1)2s2=49mm,（It is i.e. issuable vertically to fall distance
Between 49-1.96mm）.Because domatic semi-ring 10 is one 30 ° of coning angle guide face so forcing air-flow along slope panel
30 ° of lift, makes to lift to P ' places on the P points of OP lines, SP '=200 × tg30 °=115.4mm, then P`M=(115.4+25) mm>1.96-
49mm, is unlikely to cause to fall pollution on the sealing surface in control range.The installation of domatic semi-ring 10 is forced along domatic formation
Highdensity torrent band, prevents the immesurable generation for falling phenomenon in the range of prevention and control in chimneying.
Claims (1)
1. a kind of anti-lock elevated-temperature seal valve, it includes valve body（1）, valve body fulcrum bearing（2）, valve seals（3）, valve plate it is close
Seal ring（5）, valve plate（6）, valve rod（7）, transmission device（8）, valve body fulcrum bearing（2）With valve body（1）It is connected, transmission device（8）
With valve rod（7）It is connected, valve rod（7）With valve plate（6）It is connected, it is characterised in that：Valve seals（3）Positioned at valve body fulcrum bearing
（2）Inner side, along valve seals（3）Circumference have the clamping screw of multiple horizontal directions（4）With valve body fulcrum bearing（2）Phase
Connection, clamping screw（4）Perpendicular to valve seals（3）Circumferential plane, multiple elongated bolt unthreaded holes and clamping screw（4）Edge
Valve seals（3）Circumference uniform distribution, in valve body fulcrum bearing（2）With valve seals（3）Contact surface on have orienting pin
（9）, orienting pin（9）Along valve seals（3）Diametric(al), valve seals（3）Outer circumference surface and valve body（1）It is interior
There are 2-3mm gaps between periphery；The valve plate sealing ring（5）With valve plate（6）It is welded as a whole；The valve body（1）Bottom
Domatic semi-ring is installed（10）, domatic semi-ring（10）Positioned at valve plate sealing ring（5）Ventilating surface direction, domatic semi-ring（10）By vertical
In valve body（1）120 ° of annulus and the guide ring composition of inwall, the width of annulus is 30mm, the upper end of guide ring and the upper end of annulus
It is connected, the lower end of guide ring and valve body（1）Inwall is connected, guide ring（11）Anchor ring and valve body（1）Inwall is in 20 ° -30 °
Channelization angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510428076.9A CN104964048B (en) | 2015-07-21 | 2015-07-21 | Anti-locking high-temperature seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510428076.9A CN104964048B (en) | 2015-07-21 | 2015-07-21 | Anti-locking high-temperature seal butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104964048A CN104964048A (en) | 2015-10-07 |
| CN104964048B true CN104964048B (en) | 2017-05-24 |
Family
ID=54218099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510428076.9A Active CN104964048B (en) | 2015-07-21 | 2015-07-21 | Anti-locking high-temperature seal butterfly valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN104964048B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111425610A (en) * | 2020-04-16 | 2020-07-17 | 黄河水利职业技术学院 | Large-diameter valve for garden watering |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1111280A1 (en) * | 1999-12-21 | 2001-06-27 | Techspace Aero S.A. | Valve comprising a seal |
| JP2001317640A (en) * | 2000-05-11 | 2001-11-16 | Tomoe Tech Res Co | Seat ring for butterfly valve |
| CN201096202Y (en) * | 2007-11-21 | 2008-08-06 | 董映红 | High-temperature hard seal butterfly valve |
| CN102537381B (en) * | 2012-02-13 | 2013-10-30 | 石特阀门股份有限公司 | Two-way hard sealing butterfly valve |
| CN103836208B (en) * | 2012-11-22 | 2016-08-03 | 中国石油天然气集团公司 | A kind of small-bore three-eccentric-butterfly-valve and application thereof |
| CN203703169U (en) * | 2013-12-30 | 2014-07-09 | 宁波市天基隆智控技术有限公司 | High temperature butterfly valve |
| CN204900866U (en) * | 2015-07-21 | 2015-12-23 | 河北长宏阀门有限公司 | Anti -lock elevated -temperature seal butterfly valve |
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2015
- 2015-07-21 CN CN201510428076.9A patent/CN104964048B/en active Active
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| Publication number | Publication date |
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| CN104964048A (en) | 2015-10-07 |
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