CN107218402A - Push-pull valve and its encapsulating method - Google Patents
Push-pull valve and its encapsulating method Download PDFInfo
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- CN107218402A CN107218402A CN201710513348.4A CN201710513348A CN107218402A CN 107218402 A CN107218402 A CN 107218402A CN 201710513348 A CN201710513348 A CN 201710513348A CN 107218402 A CN107218402 A CN 107218402A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims description 128
- 229910000831 Steel Inorganic materials 0.000 claims description 61
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- 239000000428 dust Substances 0.000 claims description 20
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- 239000012535 impurity Substances 0.000 description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 238000013475 authorization Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 229910000851 Alloy steel Inorganic materials 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
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- 239000002253 acid Substances 0.000 description 1
- -1 and non-refractory Substances 0.000 description 1
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0227—Packings
- F16K3/0236—Packings the packing being of a non-resilient material, e.g. ceramic, metal
-
- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0281—Guillotine or blade-type valves, e.g. no passage through 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
-
- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a kind of push-pull valve and its encapsulating method, the push-pull valve, including：Valve body, valve seat, plate accommodates the seal cavity of the plate after opening, drive mechanism, in addition to two slideways parallel to each other, it is separately fixed on two madial walls of seal cavity, is connected with valve seat and is generally aligned in the same plane with valve seat；Flange, it is consistent with the shape of valve body framework, is fixed on the inwall of the valve body, with valve seat respectively positioned at the both sides of plate and parallel with the valve seat；The surrounding position of the correspondence plate sets through hole and executing agency on the flange, and the executing agency through the through hole to compress the plate.The characteristics of present invention has simple in construction, widely applicable, dependable performance, good seal, greatly reduces manufacturing cost and operating cost.
Description
Technical field
The present invention relates to sealing and valve, and in particular to a kind of push-pull valve and its encapsulating method.
Background technology
Many occasions such as cigarette machine gateway and some desulphurization systems and sulfur recovery system used in oil plant are used
Valve, according to country to environmental protection requirement：Leakage rate is that the VI levels of zero either Unite States Standard are sealed.For larger-size
Valve, it is part very difficult thing to reach this standard.During high temperature applicationss, it more difficult to realize.Such as：The inlet valve of high temperature cigarette machine,
The flue gas occasion spent for design temperature more than 700, diameter is up to 1850, smoke inlet pressure 0.25MPa, technological requirement zero leakage.
This butterfly valve of the Adiemus company manufacture of Germany, price is more than 50~600,000 dollars/platform, and size is bigger by even more than thousand
Ten thousand yuans.Of home make price is also up to 600~7,000,000 yuan/platform.Nonetheless, it is close using all existing after a period of time
Feng Buyan and the problem of leak.
The catalysis system of domestic oil plant, flue-gas temperature more than 600 is spent, in order to realize zero leakage, using the method for water sealed tank
Sealing is realized, using this sealing means, its drawback is as follows：1. investment is big, about 300~4,000,000 yuan.2. floor space is big, category
Additional floor, wastes land resource.3. polluting environment, the water of water seal is formed acid water after smoke pollution, if directly discharging,
Environment is polluted, if being discharged after processing, processing cost is high.4. operation and maintenance cost is high.Flue gas is hot, it is considered to antifreeze, and water is needed
Play circulation, in addition it is also necessary to which a whole set of control system, some cold districts need to take heater by service, and moisturizing is needed during operation.These set
Standby maintaining about needs 8~10% expense of investment every year, and equipment running cost needs hundreds of thousands member every year.5. reliability
Poorer than valve, the equipment and instrument species used in seal water system are more, add trouble point, therefore poor reliability.
For flue gas desulphurization system and sulphur recovery, in order to realize zero-emission, except the enterprise that has is with above-mentioned water sealed tank
Outside this encapsulating method, many enterprises add air blower positive draft using between the butterfly valve or two push-pull valves of double-decker
Zero leakage is realized in measure, and the size of the valve used in this occasion is often all than larger, due to manufacturing, transporting, installing, making
The deformation ratio that the reasons such as temperature and pressure medium during are caused is larger, and zero leakage to be accomplished is part very difficult thing,
Just because of the deformation that a variety of causes is caused is larger, plus the air quantity needed for air blower positive draft is very big, therefore it is very big to consume energy, even if such as
This, due on the product structure of each manufactory, is still not implemented good sealing.In addition, between two push-pull valves
Divulged information to form air curtain to realize sealing with air blower, this equivalent to two push-pull valves are complicated, cost is high, during operation, power consumption
Greatly.
Publication No. CN105066156A Chinese patent application, discloses a kind of sealing strip and the cigarette with the sealing strip
Road butterfly valve, it significantly reduced the energy consumption of fan operation and heating ventilation medium than former technology, for many users simultaneously
It is widely recognized as.It is disadvantageous in that：Still suffer from the no small energy consumption produced during fan operation and some occasions drum
It must be heated and (prevent icing from not opening) energy consumption produced again during blower ventilation to wind.
The push-pull valve that coal gas industry is used also has the problem of some are well-known.Such as Authorization Notice No. CN2896042
Chinese patent disclosed in damper be such structure.
The and for example gas baffle door and its sealing device described in Authorization Notice No. CN201526980U Chinese patent, with can
The seal pipe of inflatable realizes sealing, and it is disadvantageous in that sealing uses nonmetallic materials, and non-refractory, encapsulant is easy
Aging；And for example the sealing structure of the push-pull valve described in publication number CN104006176A Chinese patent application has same ask
Topic.
Existing push-pull valve, it is simple in construction, belong to a kind of wide variety of valve.The patent application declared is a lot, and this differs
One enumerates.The push-pull valve used vertical for plate, in two sides of plate equipped with guide rail or in push-pull valve built with making plate
Guide rail in embedded groove, the push-pull valve of this structure, because there is the guide rail being affixed with plate two sides of plate, slightly deformation or
Have debris, with regard to easy bite, and manufacture, install, transporting, the change of temperature in use all easily causes deformation.Used in many occasions
Push-pull valve, size is deformed unavoidable than larger.There is guide rail two sides of plate, this inherently a kind of waste, especially high temperature
Occasion, need to use high-alloy steel.In fact, deformation is inevitable, after such as plate is deformed by the pressure or other factorses of medium,
Both sides are close to the guide rail of plate and frictional force are produced to plate, during lifting plate, need bigger lifting force, or even two times of lifting
Power, this certainly will increase executing agency.If the guide rail of the side of plate two is not close to plate, the problem of bringing is；It is poorly sealed, on track
When there is impurity or dust stratification, it is impossible to sealing when ensureing to close.In reality, influenceed due to the presence of dust stratification or impurity sealedly
Example can be found everywhere, and be present in a variety of valves.
The especially big push-pull valve of size, during accuracy of manufacture error, transport and installing the deformation produced, use
Deformation that pressure medium and temperature influence are produced etc., often overall deformation is larger, it is extremely difficult to control, therefore zero leakage to be accomplished is part
Very difficult thing.Actually the size for the push-pull valve that many occasions are used is very big now, solves it and has leaked into when business
It is anxious.
It is refer in push-pull valve described in Authorization Notice No. CN204592362U Chinese patents in the circumference side of circular plate
Several swing arms are arranged upwards, are connected between adjacent swing arm by V-arrangement connector, and any swing arm connects drive mechanism to realize folder
Tightly.This structure is beneficial to improving sealing property.The problem of it is present be：Because metal is deformed in clamping process,
First swing arm being joined directly together with drive mechanism and V-arrangement connecting member deformation are maximum, successively decrease successively thereafter, so that clamping force
More and more weaker or even not clamping, if thinking, each clamping force is close, is difficult adjustment.In addition, only one drive mechanism is difficult driving
Numerous clamp systems, is thus still difficult to good sealing.This type of drive is then tied according to multiple drive mechanisms
Structure seems complicated in disorder.Multiple-blade baffle plate before the fans entrance at many enterprises scene, all employs this structure, handy
Seldom, it is unreliable.In addition, after deformation, clamping force is uneven, or even not clamping, it is difficult to realize good sealing
Damper hinge double leval jib sealing mechanism disclosed in Authorization Notice No. CN201100649 Chinese patent and
The patent of quadric chain hermatic door disclosed in Authorization Notice No. CN202165597U is than existing push-pull valve space-consuming
It is few, simple in construction, good sealing effect.But exist following not enough：
1. the accuracy of manufacture and manufacture, transport, installing, using caused deformation, it is allowed to realize zero leakage difficulty, size is big
When, it is impossible to the deformation avoided, it is allowed to realize that zero leakage is more difficult.
2. the required precision of pair double leval jib is strict.The length of other double leval jib differs, and the difference of heat distortion amount easily makes valve plate
Relative displacement is produced between valve seat, thus, gap is also easy to produce, influences sealing effectiveness.
3. the quadric chain inside flue has several friction pairs, when the medium in flue contains dust, Yi Ka
Firmly, not dismantled due to inside flue, it is impossible to lubricate, after blocking to repair, due to inside flue, after going wrong
Lower rear maintenance need to be hung from high-altitude, maintenance cost is high, and maintenance cycle is long.In addition stopping production is easily caused, loss is brought.
4. during for high temperature applicationss, quadric chain need to be allowed to cost height, additionally there are using expensive high-alloy steel
The problem of high-temerature creep.
5. sealing is influenceed when having dust stratification or impurity on valve seat.
6. it is the same with large-diameter butterfly valve, when pressure height or big size, it is difficult to open.
The butterfly valve commonly used now, it is difficult to accomplish zero leakage, when bore is big or temperature in use is high simultaneously, is just more difficult to accomplish
Zero leakage.
Baffle plate (butterfly valve) on desulfurizer, if poorly sealed, does not reach environmental requirement；In addition, heat smoke can pour in down a chimney,
After flue gas pours in down a chimney, one is corrosion blower fan, and two be that people cannot be introduced into construction in flue.
View of the foregoing, it will be seen that the sealing of many valves is current problem, the especially big push-pull valve of size, due to the accuracy of manufacture
The problem of, the deformation that transport, installation are caused, the deformation that medium temperature and pressure are caused during use, these factors affects
Sealing, therefore zero leakage to be accomplished is difficult to realize.In addition, on valve seat dust stratification or have impurity and influence sealing and medium in
The problem of particle is also intended to solve to the erosive wear of sealing surface.
The content of the invention
In view of the above mentioned problem present in prior art, it is contemplated that a kind of push-pull valve is disclosed, to solve existing plate
The problems such as having impurity, coking, scale effect switch on valve bite and double push-pull valve cost height and valve seat or seal, solves simultaneously
The problem of certainly existing some species of valve seal effect is poor or can not ensure sealing and the sealing problem of some high temperature applicationss.
What the technical solution of the present invention was realized in：
A kind of push-pull valve, including：Valve body, valve seat, plate, the seal cavity of the plate after receiving unlatching, drive mechanism, its
It is characterised by also including：
Two slideways parallel to each other, it is separately fixed on two madial walls of seal cavity, be connected with valve seat and with
Valve seat is generally aligned in the same plane；
Flange, it is consistent with the shape of valve body framework, is fixed on the inwall of the valve body, is located at plate respectively with valve seat
Both sides and parallel with the valve seat；
The surrounding position of the correspondence plate sets through hole and executing agency on the flange, and the executing agency is to wear
Cross the through hole and compress the plate.
Further, described executing agency is straight trip stroke cylinder.
Fixation and pressuring action due to flange and executing agency, this push-pull valve and its plate can make perpendicular to ground
With.
In order to save cylinder, gas circuit, air path elements, more than one layer channel-section steel can be set on described plate, the superiors are every
Individual channel-section steel is directly pushed down between two parties by the piston rod of corresponding cylinder, and its number of lower floor's channel-section steel is its adjacent upper strata channel-section steel
The bottom surface of several twice and a side of the upper strata channel-section steel corresponding to it is pushed down between two parties, two sides of orlop channel-section steel
Bottom surface is pressed on plate, and the corresponding plate frame of end face distance of same layer channel-section steel is of substantially equal.This structure is equivalent to plate
Tightened together with rectangle valve seat by a circle fastener, equivalent to two fasteners of undermost each channel-section steel further improve
Sealing effectiveness.Individual layer channel-section steel is fixed on plate, during multilayer channel-section steel, and after fixing each other, basecoat is fixed on plate
On.
For slideway or valve seat, the plate is located at the downstream that medium is flowed to.Because sealing surface is located at valve seat
Dust stratification, depositing contaminants, coking, fouling etc. are difficult on downstream, sealing surface.
For ensure sealing, plate bottom end surface not with valve body contact, that is,：Plate bottom end surface not with body base
Surface is contacted.
Further, the wedge shaped face in the lower end of the plate, slideway or valve seat are close in wedge-shaped tip.
Further, the neighboring of the sealing surface of seat is in contact with the neighboring of plate, and the inner rim of valve seat is with inserting
There is distance between plate without contact.That is, in an angle between the sealing surface and plate of valve seat, when plate is seated on valve seat
When, the neighboring of plate is contacted with valve seat, and inner rim and the valve plate of valve seat have individual spacing, and the size of this spacing is that valve plate is being situated between
In the presence of matter pressure, deflection of the valve plate relative to the position of valve seat inner rim.After valve plate deformation, closely pasted with valve seat just
Close.
Further, the sealing partial groove of a circle insertion is provided with the sealing surface of the valve seat, the correspondence institute on valve seat
State sealing semlsulcus groove location and be provided with sealing medium entrance that is vertical or being not orthogonal to groove axis.When the sealing medium on valve seat
When entrance is tiltedly opened along the partial groove is axial, it will contribute to blow down dust stratification in closing process simultaneously.
Further, the correspondence groove offers sealing medium outlet on the valve seat.
Further, the valve body and/or the inwall of seal cavity post insulating lining, or the valve seat sealing surface
On stud with a circle sealing strip.Have after lining, the material outside lining can use ordinary steel or relatively low steel grade.
The present invention discloses a kind of encapsulating method of push-pull valve, including：
Two slideways parallel to each other of push-pull valve are separately fixed on two madial walls of the seal cavity of push-pull valve, with
Valve seat is connected and is generally aligned in the same plane with valve seat；
The flange consistent with valve body frame shape is fixed in valve interior wall, it is parallel with valve seat and respectively positioned at the two of plate
Side, is sealed the plate and seat compression using the executing agency positioned at flange periphery and/or fastener.
Described executing agency is using straight trip stroke cylinder；
In order to more save cylinder, gas circuit, air path elements, on described plate, or also coordinate positioned at plate surrounding
One layer or two layers channel-section steel carry out fastening positioning, i.e., described cylinder piston rod is pressed on channel-section steel to by plate surrounding and valve between two parties
Seat is compressed, and with the end face distance of layer channel-section steel, its corresponding plate frame is of substantially equal.
Specifically, one layer of channel-section steel is set, that is, corresponds to each cylinder piston rod position, a channel-section steel, groove can be fixed between two parties
Its corresponding plate frame of the end face distance of steel is of substantially equal, using the Direct Travel cylinder action in the pressure on channel-section steel by institute
State plate and realize sealing with seat compression.Or, two layers of channel-section steel is set, i.e., on described plate, each cylinder piston of correspondence
The lower section of a channel-section steel on bar, symmetrically fixes two channel-section steels, the center of this two channel-section steels, respectively on cylinder piston rod
The bottom surface of two sides below channel-section steel, each side of this two channel-section steels, below the channel-section steel on cylinder piston rod
Two sides；The bottom surface of two sides of the channel-section steel on cylinder piston rod is compressed with two channel-section steels below, with
Its corresponding plate frame of the end face distance for this two channel-section steels that plate is fixed together is of substantially equal.This structure is equivalent to one
Set executing agency instead of four harness fasteners.
The neighboring of the sealing surface of seat is in contact with the neighboring of plate, have between the inner rim and plate of valve seat away from
From without contacting with a spacing L, in the presence of pressure medium, plate middle part produces the deformation for pointing to valve seat direction
Amount so that plate is gradually increased to overall realization sealing of fitting with the area that is brought into close contact of sealing surface of seat.
Further, in plate dropping process, the tip for being close to slideway or the lozenges of valve seat lower end using plate is scraped
The dust stratification or debris gone on slideway or sealing surface of seat.
Further, the sealing partial groove of a circle insertion is opened up on the sealing surface of valve seat, at the same relative set it is vertical or
It is not orthogonal to the sealing medium entrance of the partial groove axis；
Or be correspondingly arranged on the sealing surface of plate corresponding sealing partial groove simultaneously and cut so as to form an entirety
Face is about circular sealing medium receiving space；
The pipe introduced using outside is made up of the sealing medium entrance to the partial groove or two partial grooves
Injection is more than the compressed gas or liquid of pressure medium in valve to realize sealing in sealing medium receiving space.For safety,
The compressed gas can use nitrogen.Realized using liquid during sealing, the bottom of valve body need to be provided with discharge outlet, in this discharge outlet
On be connected to drain valve.
The pressure of sealing gas or liquid should be larger than the pressure of sealed medium, and the pressure differential of the two should pass through flow
And/or flow simulation and experiment are drawn, as shown in Figure 6.
The leakage rate citing of above-mentioned encapsulating method and structural shape is calculated as follows：
In above formula
Q：Leakage rate
b：The seal length of valve seat
L：The sealed width of valve seat
u：Dynamic viscosity at 20 DEG C
h：Gap between valve plate and valve seat
ΔP：Front and rear pressure differential after valve plate closing
If：Gap h=between the sealed width L=100 valve plates and valve seat of the seal length b=1000 valve seats of valve seat
0.2
For air Δ P=4kpa, this is pressure difference of the sealing gas to air to medium.
Calculate and understand：Q=104m3If/h considers the leakage rate of valve seat groove both sides simultaneously, because the pressure of sealing medium
With by sealing side pressure differential deltap P it is small, this value about should be above-mentioned Q values more than one times.
If making sealing medium of water, the dynamic viscosity of air and water is respectively 1.8X10-5PaS and 1.01X10-3PaS, is used
The conversion of amount is as follows：
QWater=(uAir/uWater)XQAir=0.018QAir
Such as：Use air 20m3/ h, then water consumption is 0.36m3/h。
From above formula, the gap h values between valve plate and valve seat are a very sensitive parameters, reduce this value
Meaning is very big.The surrounding of foregoing rectangular flange through hole is distributed several executing agencies for compressing valve plates and just seems and very must
Will.
The surrounding of rectangular flange through hole is distributed after the executing agency that several compress valve plate, can be made between valve plate and valve seat
Gap width it is very small, for the angle of mechanical experience and general knowledge：In this case, the gap h between valve plate and valve seat
The average value of value can accomplish h average≤0.05 completely, be calculated by this gap, the flow Q=1.625m of compressed gas3/ h, folding
Normal volume is counted as QStandard=1.04X1.625=1.69Nm3/ h, power consumption is less than 0.28KW, it can thus be appreciated that：Realize sealedly single
Power consumption in the time of position is very low.
In order to save, the flow of sealing medium should be controlled by controlling the pressure difference in sealing medium and valve.
It is continual that pressure is injected into the groove of plate and valve seat by entrance when sealing valve is closed
Gas or liquid more than pressure medium in valve have the problem of consuming energy all the time, in consideration of it, then can be by being arranged at valve seat
On sealing medium outlet, discharge the gas in the partial groove or sealing medium receiving space, and then enter by sealing medium
Mouth inject thereto it is non-volatile, do not solidify, viscosity is suitable or the higher paste medium of viscosity, such as lithium base grease, vaseline
Realize sealing.Because paste medium has certain viscosity, the gap of valve seat and plate is minimum, and causes the medium in valve to be difficult to let out
Leakage.Thus, then sealing medium need not be continuously injected, so as to reach the effect of energy-conservation.
Compared with prior art, the beneficial effects of the invention are as follows obvious：
1. the executing agency for being used to compress plate of flange and its surrounding distribution in the present invention so that the push-pull valve has
Better seal performance, fully achieves zero leakage, solves to be difficult to the problem of zero leakage after the deformation of large scale push-pull valve.
2. plate bottom lozenges structure of the present invention, makes plate to wipe dust stratification or miscellaneous off during sliding up and down
Thing, in addition compressed air stream or liquid flow can also remove dust stratification for accumulating on slideway or valve seat etc., also when sealing medium enters
Mouth opposing seal contributes to blow down dust stratification or impurity in closing process when tiltedly being opened with the axis of partial groove, causes the knot of the present invention
Structure, which is avoided, influences sealing because of the presence of impurity.In addition, in the closed state, due to the presence of compressed gas, at gap not
Easy fouling.In addition, the wedge structure of plate overcomes the problem of influenceing to close after lower inside dust stratification.
3. than double push-pull valves, the present invention is equal to and has lacked a deck valve and its various executing agencies, so as to significantly reduce into
This, high-alloy steel used is sufficiently expensive especially under high temperature applicationss, such as 06Cr 25Ni20 steel, and price is 4~80,000 yuan/ton.
Further, have after insulating lining structure, can again be significantly reduced and be manufactured into using relatively cheap steel grade outside lining
This, alleviates the burden of user.
4. due to being entirely metal hard-sealing, it is allowed to can be used for high temperature applicationss, overcomes soft seal aging, is not used to height
The problem of being failed after thermal field conjunction, abrasion.
5. overcome that double leval jib sealing mechanism movable member is more, can not lubricate, can not be repaired without removing, poor reliability
Or the problems such as poorly sealed, pressure is high or is difficult to open during big size.
6. for sealing means disclosed in this invention, the sealing means compared to traditional water sealed tank, small investment, operating cost
It is low, it is pollution-free, do not take up an area, reliability is high.
7. it was found from air consumption calculating, the present invention is few due to leakage rate, and power consumption is low, with double-deck gear widely used now
Plate or double push-pull valves are compared, and power consumption is incomparable, in the case of size identical, and power consumption of the invention reduces at least one
The individual order of magnitude；Meanwhile, power consumption of the present invention is substantially reduced, no matter the reduction of air consumption or power consumption, cause operating cost
Reduction, must and cause operating cost reduction.Hot gas also needs power consumption, and air consumption of the present invention is few, the power consumption pole of hot gas
It is low.
8. it was found from above-mentioned calculating, present invention reduces the requirement to device fabrication precision and integral rigidity, thus reduce
Manufacturing cost, also reduces to transport, installs, and uses the deformation requirements after being pressurized and being heated.
9. compared to traditional baffle plate and double leval jib sealing mechanism and double plate valve arrangements, structure of the present invention is simpler, manufacture
Easily, performance is more easy to ensure.
10. and only there are valve seat or slideway (also referred to as guide rail) in side, therefore save on slideway, and will not bite,
Improve the reliability used.
To sum up, plate valve arrangement and its encapsulating method of the invention, meet the market demand, solve prior art and deposited
The problem of, foreign exchange can be saved to substitute import, purchase is saved for user on the premise of performance is fully ensured and make
Use cost.
Brief description of the drawings
Fig. 1 is the structural representation of the push-pull valve of embodiment 1；
Fig. 2 is Fig. 1 F-F sectional views；
Fig. 3 is Fig. 1 D-D sectional views；
Fig. 4 is Fig. 1 E-E sectional views,
Fig. 5 is the schematic diagram of two channel-section steels of increase below Fig. 1 channel-section steels
Fig. 6 is sealing valve gas leak-testing schematic diagram；In figure,
1. the partial groove on rectangular frame valve body, 2. rectangle valve seats, 3. plates, 4. sealing surface of seats, 4 ' plate sealing surfaces
On partial groove, " 10. gag lever post of channel-section steel, 11. is straight for 5. rectangular seal cavitys, 6,6 ' slideways, 7. drive mechanisms, 9. channel-section steels 9 ', 9
Stroke cylinder, 12. rectangular flanges, 31. lozenges
A. sealing medium entrance B. sealing mediums are exported
Embodiment
Embodiment 1
A kind of push-pull valve, as shown in Figure 1 and Figure 2, for runners such as pipeline, flue, air channels, it includes：Rectangular frame valve body
1st, the circle rectangle valve seat 2 being fixed on the inwall of valve body 1, the plate 3 being attached on valve seat 2, the top of rectangular frame valve body 1 and valve body
The 1 rectangular seal cavity 5 for being used to after plate 3 is opened accommodate plate being fixed together, be connected with valve seat 2 in seal cavity 5 and
With two parallel slideways 6 and 6 ' that valve seat 2 is generally aligned in the same plane, two slideways 6 and 6 are separately fixed at the two of seal cavity 5
On individual madial wall, the drive mechanism 7 for being used to drive plate closure or openness of the top of seal cavity 5 is fixed on；Also include fixing
In a circle rectangular flange 12 on the inwall of rectangular frame valve body 1, for rectangle valve seat 2 is located at the side of plate 3, Rectangular Method
Orchid 12 is located at the opposite side of plate 3 and parallel with rectangle valve seat 2, and the surrounding of the through hole of rectangular flange 12 is distributed described in several compressions
The executing agency of plate 3, described executing agency is straight trip stroke cylinder 11.
Further, in order to save executing agency, such as straight trip stroke cylinder, gas circuit, air path elements can be in described plates 3
On, the piston rod of correspondence cylinder, fixed channel-section steel 9 placed in the middle, bottom surface and the plate 3 of two sides of channel-section steel 9 are fixed together, channel-section steel
12 cross section is parallel to the frame of plate 3 corresponding to it；Equivalent to two fastener two fastening points of formation of i.e. each channel-section steel,
Plate 3 and rectangle valve seat 2 are tightened together along the periphery of the plate 3, even if so plate 3 is used perpendicular to ground,
Also the sealing effectiveness of the push-pull valve can be ensured, and plate 3 is used perpendicular to ground.
Further, as shown in figure 5, situation to be provided with two layers of channel-section steel, i.e., on described plate, correspondence cylinder is lived
The center that the lower section of channel-section steel 9 on stopper rod, symmetrically fixes two channel-section steels 9 ' and 9 ", this two channel-section steels 9 ' and 9 ", respectively positioned at cylinder
The bottom surface of two sides of the lower section of channel-section steel 9 on piston rod, this two channel-section steel 9 ' and 9 " each sideways, parallel to cylinder piston
Two sides of the lower section of channel-section steel 9 on bar；The bottom surface of two sides of the channel-section steel 9 on the cylinder piston rod with below
The end face distance of two channel-section steels pressure 9 ' and 9 " compression, with this two channel-section steel 9 ' and 9 that plate 3 is fixed together " its is corresponding
The frame of plate 3 is of substantially equal.This structure instead of four harness fasteners equivalent to set of execution mechanism.
In order to prevent the dust stratification of rectangle valve seat 2 or have debris influence sealing, can also use following encapsulating method, i.e., relative to
For slideway 6,6 ' or rectangle valve seat 2, plate 3 is located at the downstream that medium is flowed to；Because sealing surface is located under rectangle valve seat 2
Trip, then be difficult dust stratification, depositing contaminants, coking, fouling on sealing surface.
Because plate 3 is for rectangle valve seat 2, the downstream flowed to positioned at medium, then plate 3 that can be in valve body with
Between rectangular flange 12, two gag lever posts 10 perpendicular to ground are fixed close to plate 3, to prevent plate 3 from being blown off by medium, are made
Cheng Qiyu rectangles valve seat 2 is influenceed to use and sealing effectiveness away from too far away, and gag lever post 10 is fixed on the inwall of valve body upper and lower.
Further, in order to wipe the dust stratification and debris on slideway 6,6 ' or the surface of valve seat 2 off and prevent lower inside from accumulating
The whereabouts of ash influence closing process centerboard 3, the lower end of the plate 3 wedge shaped face 31 in terms of both sides, or referred to as perching knife shape, such as scheme
Shown in 2, slideway 6,6 ' or valve seat 2 are close in the tip of perching knife.Lower end in perching knife shape plate 3 in dropping process, can be by valve
The dust stratification or impurity of lower section are extruded onto on one side, are conducive to valve Close All and are realized good sealing.In addition, relatively conventional level
For pipeline push-pull valve, the push-pull valve saves the slideway of opposite side.Manufacturing cost is reduced, using also more convenient.
Embodiment 2
On the basis of embodiment 1, in order to realize better sealing, as shown in figure 3, being provided with the sealing surface of valve seat 2
The partial groove 4 of one circle insertion, it is vertical on the valve seat 2 at the position of partial groove 4 or be not orthogonal to valve seat 2 and drill, it is introduced from outside into pipe
Son injects compressed gas or liquid more than pressure medium in valve to realize sealing by A entrances into this groove 4.
Further, it is corresponding on the compressed gas of sealing or the flow area of liquid, the sealing surface of plate 3 in order to increase
The partial groove 4 ' of a circle insertion is correspondingly provided with the partial groove 4 on valve seat 2.
In order to meet to demands such as the flows or fluidised form of compressed gas or liquid during sealing, the difference on the groove 4 of valve seat 2
Position perpendicular to or be not orthogonal to valve seat 2 bore several holes, be introduced from outside into pipe and be connected respectively with this some holes, from outside by
The entrance A of pipe is more than the compressed gas or liquid of pressure medium in valve to realize sealing to the interior injection of groove 4 and 4 '.
Realized using liquid during sealing, the bottom of valve body 1 need to be provided with discharge outlet, be connected in this discharge outlet hydrophobic
Valve.
For safety, described compressed gas is nitrogen to some occasions.Accumulated in preferably blow down on valve seat
Passage on dust stratification, valve seat is tiltedly opened along groove direction.This helps to blow down dust stratification in closing process.
In order to more be saved while sealing is ensured, the push-pull valve can use following sealing means：
In view of when the push-pull valve is closed, it is continual by entrance A to plate 3 and valve seat 2
The gas or liquid that sealing is more than pressure medium in valve with injection pressure in partial groove 4 or groove 4 have asking of consuming energy all the time
Topic, in order to reduce energy consumption, in the case that pressure medium is not high in valve, can open a sealing medium outlet B on valve seat 2,
By to sealing medium entrance A inject it is non-volatile, do not solidify, viscosity is suitable or the higher paste medium of viscosity, such as lithium base lubricates
Fat, vaseline etc., because paste medium has certain viscosity, the gap of valve seat 2 and plate 3 is minimum, in this case, in valve
Medium be difficult leakage.Thus, then sealing medium need not be continuously injected, seals and saves so as to realize.To this
In cavity during injection paste medium, it is necessary to discharge the air in cavity, that is, pass through the close of the correspondingly opposite side of sealing medium entrance
Seal the discharge that media outlet B realizes the gas medium or liquid medium of former sealing.
Embodiment 3
On the basis of previous embodiment 1 or embodiment 2, when the plate 3 is seated in the upper of slideway 6,6 ' or valve seat 2
Side, for slideway 6,6 ' or valve seat 2, in the case that plate 3 is located at the upstream that medium is flowed to, if it is more preferable to think that push-pull valve is realized
Sealing, reduce sealing compressed gas or liquid flow, need to cause its plate 3 is deformed small, cost can be significantly increased in this；
In order to reduce the manufacturing cost of plate 3, then structure as shown in Figure 4 can be used, plate 3 is seated on rectangle valve seat 2, rectangle valve
In an angle between the sealing surface and plate 3 of seat 2, that is,：When plate 3 is seated on valve seat 2, the neighboring of plate 3 with
Valve seat 2 is contacted, and the inner rim of valve seat 2 has individual spacing L with inserting 3 plates, when plate 3 is in the presence of pressure medium, plate 3 relative to
The deformation at the position of valve seat inner rim just can compensate for the spacing L, i.e., under pressure medium, after plate 3 is deformed, just with
Valve seat 2 is brought into close contact.After plate is pressurized, this spline structure can increase the contact area of sealing surface.
On the basis of above-described embodiment, in order to realize good sealing, valve seat 2 is towards inlaying on the sealing surfaces of plate 3
There is a circle sealing strip；
To ensure sealing, the bottom end surface of plate 3 is not contacted with valve body 1, that is,：The bottom end surface of plate 3 not with the bottom of valve body 1
Inner surface contact.
For reduction high temperature resistant, the consumption of corrosion resistant high-alloy steel, the inwall of valve body 1 and/or rectangular seal cavity 5 is posted
Insulating lining, then the material outside lining can and steel grade that cost be relatively low relatively low using ordinary steel or performance.
In fact, except the rectangle push-pull valve in above-described embodiment, for other shapes of push-pull valve, above-mentioned sealing structure
And encapsulating method is equally applicable；Even double leval jib sealing mechanism, Yi Jidie are hinged in quadric chain hermatic door or damper
It is equally applicable in valve arrangement.Further, in an angle between the sealing surface and plate of valve seat, that is,：When valve plate is seated in valve seat
When upper, the neighboring of valve plate is contacted with valve seat, and inner rim and the valve plate of valve seat have individual spacing, and this spacing will be by valve plate in medium
In the presence of pressure, valve plate is compensated or offset relative to the deflection at the position of valve seat inner rim, i.e., valve plate is in pressure medium
After the lower deformation of effect, it can be brought into close contact just with valve seat.Due to having used compressed gas or liquid to realize sealing, it is related to double leval jib
Mechanism seals door or damper are hinged double leval jib sealing mechanism, can also utilize compressed gas or liquid in closing process
To purge the dust stratification or impurity on valve seat, kill two birds with one stone.
On drive mechanism, belong to professional knowledge, how on the books in the prior art and openly, this is not repeated.
The pressure of sealing gas or liquid should be larger than the pressure of sealed medium, and the pressure differential of the two should pass through flow
And/or flow simulation and experiment are drawn.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art in the technical scope of present disclosure, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (10)
1. a kind of push-pull valve, including：Valve body, valve seat, plate accommodates the seal cavity of the plate after opening, drive mechanism, its spy
Levy and be also to include：
Two slideways parallel to each other, it is separately fixed on two madial walls of seal cavity, is connected with valve seat and and valve seat
It is generally aligned in the same plane；
Flange, it is consistent with the shape of valve body framework, is fixed on the inwall of the valve body, is located at the two of plate respectively with valve seat
Side and parallel with the valve seat；
The surrounding position of the correspondence plate sets executing agency on the flange, and the executing agency passes through corresponding on flange
The through hole of position is to compress the plate.
2. push-pull valve as claimed in claim 1, it is characterised in that：
Described executing agency is straight trip stroke cylinder；
On described plate, provided with more than one layer channel-section steel, each channel-section steel of the superiors is occupied by the piston rod of corresponding cylinder
In directly push down, its number of lower floor's channel-section steel is twice of its adjacent upper strata channel-section steel number and is upper strata channel-section steel corresponding to it
The bottom surface of one side is pushed down between two parties, and the bottom surface of two sides of orlop channel-section steel is pressed on plate, the end face of same layer channel-section steel
It is of substantially equal apart from corresponding plate frame.
3. push-pull valve as claimed in claim 1, it is characterised in that：
For slideway or valve seat, the plate is located at the downstream that medium is flowed to.
4. push-pull valve as claimed in claim 1, it is characterised in that：
The wedge shaped face in lower end of the plate, slideway or valve seat are close in wedge-shaped tip.
5. push-pull valve as claimed in claim 1, it is characterised in that：
The neighboring of the sealing surface of seat is in contact with the neighboring of plate, have between the inner rim and plate of valve seat distance and
Do not contact.
6. the push-pull valve as described in claim 1-5 is any, it is characterised in that：
The sealing partial groove of a circle insertion is provided with the sealing surface of the valve seat, the correspondence sealing partial groove on valve seat
Position is provided with sealing medium entrance that is vertical or being not orthogonal to groove axis；
Or, the sealing semlsulcus groove location on the sealing surface of plate on the correspondence valve seat is provided with corresponding sealing simultaneously
Use partial groove；
Correspondence sealing thereon offers sealing medium outlet with partial groove on the valve seat.
7. a kind of encapsulating method of push-pull valve, including：
Two slideways parallel to each other of push-pull valve are separately fixed on two madial walls of the seal cavity of push-pull valve, with valve seat
It is connected and is generally aligned in the same plane with valve seat；
The flange consistent with valve body frame shape is fixed in valve interior wall, it is parallel with valve seat and is located at the both sides of plate respectively,
The plate and seat compression are sealed using the executing agency positioned at flange periphery and/or fastener.
8. encapsulating method as claimed in claim 7, it is characterised in that：
Described executing agency is using straight trip stroke cylinder；
Or also coordinating one layer positioned at plate surrounding or two layers of channel-section steel progress fastening positioning, i.e., described cylinder piston rod is pressed between two parties
To by plate surrounding and seat compression, with the end face distance of layer channel-section steel, its corresponding plate frame is of substantially equal on channel-section steel.
9. encapsulating method as claimed in claim 7 or 8, it is characterised in that：
The neighboring of the sealing surface of seat is in contact with the neighboring of plate, have between the inner rim and plate of valve seat distance and
A spacing L is not contacted with, and in the presence of pressure medium, plate middle part produces the deflection for pointing to valve seat direction, makes
Obtain plate and be gradually increased to overall realization sealing of fitting with the area that is brought into close contact of sealing surface of seat.
10. encapsulating method as claimed in claim 7 or 8, it is characterised in that：
In plate dropping process, the tip for being close to slideway or the lozenges of valve seat lower end using plate scrapes off slideway or valve seat is close
Dust stratification or debris on front cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710513348.4A CN107218402A (en) | 2017-06-24 | 2017-06-24 | Push-pull valve and its encapsulating method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710513348.4A CN107218402A (en) | 2017-06-24 | 2017-06-24 | Push-pull valve and its encapsulating method |
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| CN107218402A true CN107218402A (en) | 2017-09-29 |
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ID=59951161
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710513348.4A Pending CN107218402A (en) | 2017-06-24 | 2017-06-24 | Push-pull valve and its encapsulating method |
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| CN113883288A (en) * | 2021-08-25 | 2022-01-04 | 无锡凯必特斯半导体科技有限公司 | Full-automatic backflow-preventing plug board valve for semiconductor factory and backflow-preventing method |
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| CN113883288B (en) * | 2021-08-25 | 2023-12-26 | 无锡凯必特斯半导体科技有限公司 | Full-automatic backflow-preventing plug board valve for semiconductor factory and backflow-preventing method |
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