CN206845948U - Push-pull valve - Google Patents
Push-pull valve Download PDFInfo
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- CN206845948U CN206845948U CN201720794766.0U CN201720794766U CN206845948U CN 206845948 U CN206845948 U CN 206845948U CN 201720794766 U CN201720794766 U CN 201720794766U CN 206845948 U CN206845948 U CN 206845948U
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- sealing
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Abstract
The utility model discloses a kind of push-pull valve, and it includes valve body, valve seat, plate, the seal cavity of the plate after receiving unlatching, drive mechanism；Also include 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；The slideway and valve seat and ground are at an acute angle；The plate is seated in the top of slideway or valve seat, and for slideway or valve seat, plate is located at the upstream of medium flow direction.The utility model has the characteristics of simple in construction, widely applicable, dependable performance, good seal, greatly reduces manufacturing cost and operating cost.
Description
Technical field
It the utility model is related to sealing and valve, and in particular to a kind of push-pull valve.
Background technology
Many occasions such as cigarette machine gateway and some desulphurization systems and sulfur recovery system used in oil plant use
Valve, according to country to environmental protection requirement：Leakage rate is that the VI levels of zero either Unite States Standard seal.For larger-size
Valve, it is the very difficult thing of part 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, for price more than 50~600,000 dollars/platform, 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, it is as follows using this sealing means, its drawback：1. investment is big, about 300~4,000,000 yuan.2. floor space is big, category
Additional floor, waste 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, and consideration is antifreeze, and water needs
Play circulation, it is also necessary to which a whole set of control system, some cold districts need to take heater by service, need moisturizing during operation.These set
Standby maintaining about needs 8~10% expense of investment every year, and equipment running cost needs hundreds of thousands first 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 use adds air blower positive draft 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 bigger, due to manufacturing, transporting, installing, making
Deformation ratio caused by the reasons such as temperature and pressure medium during is larger, and zero leakage to be accomplished is the very difficult thing of part,
Just because of deformation is larger caused by a variety of causes, add the air quantity needed for air blower positive draft 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
To be divulged information to form air curtain to realize sealing with air blower, this equivalent to two push-pull valves are complicated, and cost is high, during operation, power consumption
Greatly.
Publication No. CN105066156A Chinese patent application, disclose 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 no small energy consumption caused by fan operation and some occasions drum
It must be heated and (prevent icing from not opening) caused energy consumption again during blower ventilation to wind.
The push-pull valve that coal gas industry uses also there is some it is known that the problem of.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, which is disadvantageous in that to seal, uses nonmetallic materials, non-refractory, and encapsulant is easy
Aging；And for example there is same to ask for the sealing structure of the push-pull valve described in publication number CN104006176A Chinese patent application
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 to deform.Used in many occasions
Push-pull valve, size is bigger, and deformation is unavoidable.There is guide rail two sides of plate, this inherently a kind of waste, especially high temperature
Occasion, high-alloy steel need to be used.In fact, deformation is inevitable, after being deformed such as plate by the pressure or other factorses of medium,
The guide rail that plate is close in both sides produces frictional force to plate, when lifting plate, needs bigger lifting force, or even two times of lifting
Power, this certainly will increase executing agency.If the problem of guide rail of the side of plate two is not close to plate, brought is；It is poorly sealed, on track
When impurity or dust stratification be present, sealing when can not ensure to close.In reality, sealing is influenceed due to the presence of dust stratification or impurity
Example can be found everywhere, and be present in a variety of valves.
The especially big push-pull valve of size, during deformation, use caused by accuracy of manufacture error, transport and installation
Pressure medium and temperature influence caused deformation etc., and often overall deformation is larger, it is extremely difficult to controls, therefore zero leakage to be accomplished is part
Very difficult thing.Actually the size for the push-pull valve that many occasions use is very big now, solves its leakage 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 connection drive mechanism is pressed from both sides to realize
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 not easy to adjust.In addition, only one drive mechanism is difficult driving
Numerous clamp systems, thus still it is 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 realizes 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 following deficiency be present：
1. the accuracy of manufacture and manufacture, transport, installing, using caused deformation, it is allowed to realize that zero leakage is difficult, size is big
When, unavoidable deformation, 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 that inside flue, can not 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, maintenance cycle length.In addition stopping production is easily caused, brings loss.
4. be used for high temperature applicationss, quadric chain need to use expensive high-alloy steel, be allowed to cost height, additionally there are
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 is high or size is big, it is difficult to open.
Conventional butterfly valve now, it is difficult to accomplish zero leakage, when bore is big or temperature in use is high simultaneously, be 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, first, corrosion blower fan, constructs second, people cannot be introduced into 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, deformation caused by transport, installation, deformed during use caused by medium temperature and pressure, 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
Particle is also intended to solve the problems, such as to the erosive wear of sealing surface.
The content of the invention
In view of the above mentioned problem present in prior art, the utility model is intended to disclose a kind of push-pull valve, existing to solve
There is the problems such as impurity, coking, fouling, influence switch or sealing on push-pull valve bite and double push-pull valve cost height and valve seat,
Solve the problems, such as existing some species of valve seal effect difference simultaneously or the close of sealing and some high temperature applicationss can not be ensured
Seal problem.
What technical solution of the present utility model 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；
Also include two slideways parallel to each other, it is separately fixed on two madial walls of seal cavity, with valve seat phase
It is generally aligned in the same plane even and with valve seat；
The slideway and valve seat and ground are at an acute angle；
The plate is seated in the top of slideway or valve seat, and for slideway or valve seat, plate is located at medium flow direction
Upstream.
This push-pull valve that certain angle is carried with ground, first realizes initial sealing by the component conducted oneself with dignity to compress valve seat,
And thrust of the component by conducting oneself with dignity when increasing sealing, during work, by the tighter of pressure medium pressure, realize better seal.Together
When, due to the thrust there is plate to valve seat all the time, when plate moves up and down, the product on valve seat and slideway can be wiped off
Ash or debris, be advantageous to realize good sealing when closing.And the structure also saves the slideway of side, it is thus also avoided that two
Easily caused bite when there is slideway side.
For ensure seal, plate bottom end surface not with valve body contact, that is,：Plate bottom end surface not with body base
Surface contacts.
Further, slideway or valve seat are close in the wedge shaped face in the lower end of the plate, 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 contacting.That is, it 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 contacts 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, valve plate relative to the position of valve seat inner rim deflection.After valve plate deformation, closely pasted with valve seat just
Close.
Further, the push-pull valve also includes flange, and it is consistent with the shape of valve body framework, is fixed on the valve body
Inwall, with valve seat respectively positioned at the both sides of plate and parallel with the valve seat；
The surrounding position that the plate is corresponded on the flange sets through hole and executing agency, and the executing agency is wearing
Cross the through hole and compress the plate.In fact, the plate of this push-pull valve compressed using flange and executing agency can also
Used perpendicular to ground.
Specifically, described executing agency is straight trip stroke cylinder.
Further, can be on described plate, provided with more than one layer groove in order to save cylinder, gas circuit, air path elements
Steel, each channel-section steel of the superiors are directly pushed down between two parties by the piston rod of corresponding cylinder, and its number of lower floor's channel-section steel is adjacent for its
Twice of upper strata channel-section steel number and divide the bottom surface of a side of the upper strata channel-section steel corresponding to it to push down between two parties respectively, orlop
The bottom surface of two sides of channel-section steel is pressed on plate, and plate frame is of substantially equal corresponding to the end face distance of same layer channel-section steel.I.e.
Individual layer channel-section steel is fixed on plate, and during multilayer channel-section steel, after fixed between each other, basecoat is fixed on plate.
This structure is tightened together equivalent to plate and rectangle valve seat by a circle fastener, undermost each channel-section steel phase
When the effect in two fasteners, effectively improving sealing, and plate is allowed to be used perpendicular to ground.
Further, the sealing partial groove of circle insertion is provided with the sealing surface of the valve seat, institute is corresponded 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 corresponding groove is opened on the valve seat and offers sealing medium outlet.
Further, the valve body and/or the inwall of seal cavity post insulating lining, or the sealing surface of the valve seat
On stud with a circle sealing strip.After having lining, the material outside lining can use ordinary steel or relatively low steel grade.
The utility model also 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 slideway and valve seat and ground are at an acute angle；Valve seat is compressed by the component of plate deadweight and realizes the first of push-pull valve
Begin to seal and use the thrust that increase seals；
The plate is seated in the top of slideway or valve seat, and for slideway or valve seat, plate is located at medium flow direction
Upstream, thereby to wipe the dust stratification or debris on slideway and sealing surface of seat off.
Further, in plate dropping process, the tip that slideway or the lozenges of valve seat lower end are close to using plate is scraped
The dust stratification or debris gone on slideway or sealing surface of seat.
Or it is further, the neighboring of the sealing surface of seat is in contact with the neighboring of plate, the inner rim of valve seat
There is distance between plate without contacting with a spacing L, in the presence of pressure medium, plate middle part, which produces, points to valve
The deflection in seat direction so that plate is gradually increased to integrally be bonded realization sealing with the area that is brought into close contact of sealing surface of seat.
Or it is further, the flange consistent with valve body frame shape is fixed in valve interior wall, it is parallel with valve seat and divides
Not Wei Yu plate both sides, the surrounding position that the plate is corresponded on the flange sets executing agency, stroke cylinder of such as keeping straight on, institute
State straight trip stroke cylinder and compress the plate through the through hole of opposite position on flange；Or also coordinate one positioned at plate surrounding
The positioning of the compression of layer or two layers channel-section steel, i.e., described cylinder piston rod are pressed on channel-section steel to by plate surrounding and valve seat pressure between two parties
Tightly, with the end face distance of layer channel-section steel, its corresponding plate frame is of substantially equal.
Further, the sealing that circle insertion is opened up on the sealing surface of valve seat accommodates sealing medium, same phase with partial groove
Sealing medium entrance that is vertical or being not orthogonal to the partial groove axis should be set；
Or it is correspondingly arranged corresponding sealing partial groove on the sealing surface of plate simultaneously and is accommodated with expanding sealing medium
Space；
The pipe introduced using outside is injected by the sealing medium entrance into sealing medium receiving space is more than valve
The compressed gas or liquid of interior pressure medium seal to realize.
For safety, the compressed gas can use nitrogen.During using liquid to realize sealing, the bottom of valve body need to be provided with
Discharge outlet, drain valve is connected in this discharge outlet.
Sealing gas or the pressure of 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 9.
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=104m3/h
If considering the leakage rate of valve seat groove both sides simultaneously, because the pressure of sealing medium and the pressure differential deltap by sealing side
P is small, and this value about should be above-mentioned Q values more than one times.
If doing sealing medium with water, the dynamic viscosity of air and water is respectively 1.8X10-5PaS and 1.01X10-3PaS, use
The conversion of amount is as follows：
QWater=(uAir/uWater)XQAir=0.018QAir
Such as：With air 20m3/ h, then water consumption 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.
After the surrounding of rectangular flange through hole is distributed the executing agency that several compress valve plate, it can make between valve plate and valve seat
Gap width it is very small, from the angle of mechanical experience and general knowledge for：In this case, the gap h between valve plate and valve seat
The average value of value can accomplish h completelyIt is average≤ 0.05, calculated by this gap, the flow Q=1.625m of compressed gas3/ h, conversion
It is Q into normal volumeStandard=1.04X1.625=1.69N m3/ h, power consumption are less than 0.28KW, it can thus be appreciated that：Realize the list of sealing
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
More than pressure medium in valve gas or liquid there is consuming energy all the time the problem of, in consideration of it, then can be by being arranged at valve seat
On sealing medium outlet, discharge the gas in partial groove or the sealing medium receiving space, and then enter by sealing medium
Mouth inject thereto it is non-volatile, do not solidify, the paste medium that viscosity is suitable or viscosity is higher, 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 not easy 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 utility model are obvious：
1. gravity when the utility model tilts by plate seals in advance, and only side has valve seat or slideway (can also claim
Be guide rail), therefore save on slideway, and will not bite.Due to the thrust there is plate to valve seat all the time, when on plate
During lower motion, dust stratification or debris on valve seat and slideway can be wiped off, be advantageous to realize good sealing when closing.
2. the utility model plate bottom lozenges structure and its oblique mounting structure, produce the component of plate gravity
To the pressure of slideway or valve seat can be cleaner wipe dust stratification or debris off, compressed air stream or liquid flow can also be clear in addition
Except dust stratification accumulated on slideway or valve seat etc., also have when sealing medium entrance opposing seal is tiltedly opened with the axis of partial groove
Help blow down dust stratification or impurity in closing process, cause structure of the present utility model avoid influenceed because of the presence of impurity it is close
Envelope.In addition, in the closed state, due to the presence of compressed gas, it is less scaling at gap.
In addition, the wedge structure of plate is overcome the problem of influenceing to close after lower inside dust stratification.
3. it is equal to than double push-pull valve the utility model and has lacked a deck valve, so as to significantly reduce cost, especially high-temperature field
It is sufficiently expensive to close lower high-alloy steel used, such as 06Cr25Ni20 steel, price is 4~80,000 yuan/ton.Further, there is guarantor
After warm lining structure, relatively cheap steel grade can be used outside lining, manufacturing cost is significantly reduced again, alleviates user's
Burden.
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 thermal field is closed, failed after abrasion.
After 5. the surrounding of flange through hole is distributed the executing agency that several compress valve plate, good seal performance, fully achieve
Zero leakage, solves the problem that zero leakage is difficult to after large scale push-pull valve deforms.
6. overcoming, double leval jib sealing mechanism movable member is more, can not lubricate, can not be repaired without removing, poor reliability
Or poorly sealed, the problems such as being difficult to open when pressure is high or size is big.
7. sealing means disclosed in the utility model, for the sealing means compared to traditional water sealed tank, small investment, operation
Expense is low, pollution-free, does not take up an area, and reliability is high.
8. it was found from air consumption calculating, for the utility model because leakage rate is few, power consumption is low, with widely used now pair
Layer baffle plate or double push-pull valves are compared, and power consumption is incomparable, and in the case of size identical, power consumption of the present utility model reduces
At least one order of magnitude；Meanwhile the utility model power consumption substantially reduces, no matter the reduction of air consumption or power consumption,
So that operating cost reduce, must and cause operating cost reduce.Hot gas also needs to consume energy, and the utility model air consumption is few,
The power consumption of hot gas is extremely low.
9. it was found from above-mentioned calculating, the utility model reduces the requirement to device fabrication precision and integral rigidity, thus
Manufacturing cost is reduced, is also reduced to transport, installation, uses the deformation requirements after being pressurized and being heated.
10. comparing traditional baffle plate and double leval jib sealing mechanism and double plate valve arrangements, the utility model structure is simpler,
Manufacture is easier, and performance is more easy to ensure.
To sum up, plate valve arrangement and its encapsulating method of the present utility model, meet the market demand, solve prior art
The problems of, it can save foreign exchange to substitute import, purchase saved for user on the premise of performance is fully ensured
And 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 and Fig. 2 I portions enlarged drawing；
Fig. 5 is the structural representation of the push-pull valve of embodiment 2；
Fig. 6 is the structural representation of the push-pull valve of embodiment 3；
Fig. 7 is Fig. 6 F-F sectional views；
Fig. 8 is the structural representation of two layers of channel-section steel in embodiment 3；
Fig. 9 is sealing valve gas leak-testing schematic diagram；In figure,
1. rectangular frame valve body, 2. rectangle valve seats, 3. plates, the partial groove on 4. sealing surface of seats, 4 ' plate sealing surfaces
On partial groove, 5. rectangular seal cavitys, 6,6 ' slideways, 7. drive mechanisms, 9,9 ', 9 " 10. gag lever post of channel-section steel, 11. straight trips
Stroke cylinder, 12. rectangular flanges, the outlet of 31. lozenges A. sealing medium entrance B. sealing mediums
Embodiment
Embodiment 1
A kind of square push-pull valve, as shown in figure 1, the push-pull valve for runners such as horizontal pipe, flue, air channels, including：Square
Shape framework valve body 1, one be fixed on the inwall of valve body 1 enclose rectangle valve seat 2, the plate 3, the rectangular frame valve body 1 that are attached on valve seat 2
The rectangular seal cavity 5 that what top and valve body 1 were fixed together, which be used for after plate 3 is opened, accommodates plate, in seal cavity 5 and valve
Seat 2 is connected and is separately fixed at sealing with two parallel slideways 6 and 6 ' that valve seat 2 is generally aligned in the same plane, two slideways 6 and 6
On two madial walls of cavity 5, the drive mechanism 7 for being used to drive plate closure or openness of the top of seal cavity 5 is fixed on；Its
In, slideway 6 and 6 ' and valve seat 2 and ground are at an acute angle, and plate 3 is seated in the top of slideway 6 and 6 ' or valve seat 2, compared to the He of slideway 6
6 ' or valve seat 2 for, plate 3 be located at medium flow direction upstream.This push-pull valve that certain angle is carried with ground, first by deadweight
Component realize initial sealing to compress valve seat 2, and the thrust when component by conducting oneself with dignity increases sealing, during work, by medium
Pressure pressure it is tighter, so as to realize better seal.Simultaneously as the thrust there is plate 3 to valve seat 2 all the time, when inserting
When plate 3 moves up and down, valve seat 2 and dust stratification or debris on slideway 6 and 6 ' can be wiped off, well close is realized when being advantageous to close
Envelope.In addition, for relatively conventional horizontal pipe push-pull valve, the slideway of opposite side is saved.The board plug structure of perching knife shape, i.e.,
Plate lower end is lozenges 31, and as shown in Figure 2 and Figure 4, slideway or valve seat are close in wedge-shaped tip, can be slided up and down in plate
During, the dust stratification or debris on slideway or sealing surface of seat are scraped off, and thus further overcome inside or below push-pull valve
The problem of influenceing to close after dust stratification.
Embodiment 2
On the basis of embodiment 1, if thinking, push-pull valve realizes better seal, reduces the compressed gas or liquid of sealing
Flow, it is small need to make it that its plate 3 deforms, cost can be significantly increased in this；In order to reduce the manufacturing cost of plate 3, then can use
Structure as shown in Figure 5, plate 3 are seated on rectangle valve seat 2, in a folder between the sealing surface and plate 3 of rectangle valve seat 2
Angle, that is,：When plate 3 is seated on valve seat 2, the neighboring of plate 3 contacts with valve seat 2, and the inner rim of valve seat 2 is with inserting 3 plates
There is individual spacing L, when plate 3 is in the presence of pressure medium, plate 3 just can compensate for relative to the deformation at the position of valve seat inner rim
The spacing L, i.e., under pressure medium, after plate 3 is deformed, it is brought into close contact just with valve seat 2.After plate is pressurized, so
Structure can increase the contact area of sealing surface.
Embodiment 3
As shown in Figure 6, Figure 7, a kind of push-pull valve for runners such as pipeline, flue, air channels, it is on the basis of embodiment 1
On, in addition to a circle rectangular flange 12 on the inwall of rectangular frame valve body 1 is fixed on, it is located at the one of plate 3 relative to rectangle valve seat 2
For side, rectangular flange 12 is located at the opposite side of plate 3 and, the surrounding distribution of rectangular flange 12 through hole parallel with rectangle valve seat 2
Several compress the executing agency of the plate 3, and described executing agency is straight trip stroke cylinder 11.There is inserting for track this side
Its plate 3 of plate valve can also use perpendicular to ground.For embodiment 1, the present embodiment is in rectangular frame valve body 1
A circle rectangular flange 12 is fixed on wall, the surrounding of the through hole of rectangular flange 12 is distributed several executing agencies for compressing valve plate.
Further, in order to save executing agency, such as keep straight on stroke cylinder, gas circuit, air path elements can be in described plates 3
On, the piston rod of corresponding cylinder, placed in the middle to fix channel-section steel 9, 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 fasteners of i.e. each channel-section steel form two fastening points,
Plate 3 and rectangle valve seat are tightened together along the periphery of the plate 3, so then not only further improve sealing effectiveness,
Plate 3 can be even allowed to be used perpendicular to ground.
Further, in order to more save cylinder, gas circuit, air path elements, as shown in figure 8, can on described plate,
The center that the lower section of channel-section steel 9 on corresponding cylinder piston rod, symmetrically fixes two channel-section steels 9 ' and 9 ", this two channel-section steels 9 ' and 9 ", divides
Each side of the bottom surface of two sides of the lower section of channel-section steel 9 that Wei Yu be on cylinder piston rod, this two channel-section steel 9 ' and 9 ", it is parallel
In two sides of the lower section of channel-section steel 9 on cylinder piston rod；The bottom of two sides of the channel-section steel 9 on cylinder piston rod
The end face of face and two channel-section steels pressure 9 ' and 9 " compression, this two channel-section steel 9 ' and 9 being fixed together with plate 3 " below away from
Frame of plate 3 corresponding from its is of substantially equal.This structure drives 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 to the downstream of medium flow direction；Because sealing surface is located under rectangle valve seat 2
Trip, then be not easy dust stratification or depositing contaminants on sealing surface.
Because plate 3 is for rectangle valve seat 2, positioned at medium flow direction downstream, then can the plate 3 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 influences to use away from too far away and sealing effectiveness, gag lever post 10 are fixed on the inwall of valve body upper and lower.
Further, following structure and method can also be used to improve the sealing property of push-pull valve, including：
In order to wipe dust stratification on slideway 6,6 ' or the surface of valve seat 2 and debris off and prevent lower inside dust stratification from influenceing to close
The whereabouts of 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 Fig. 2, Fig. 4 and Fig. 7
Shown in, 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.
In order to realize good sealing, valve seat 2 is towards studding with a circle sealing strip on the sealing surfaces of plate 3；
For the purposes of realizing good sealing, the partial groove 4 of circle insertion is provided with the sealing surface of valve seat 2, in partial groove 4
It is vertical or be not orthogonal to valve seat drilling on the valve seat 2 at position, it is introduced from outside into pipe and is injected by A entrances into this groove 4
Compressed gas or liquid more than pressure medium in valve seal to realize.
Further, in order to increase the flow area of the compressed gas of sealing or liquid, corresponded on the sealing surface of plate 3
The partial groove 4 ' of circle insertion is correspondingly provided with the partial groove 4 on valve seat 2.
To demands such as the flows or fluidised form of compressed gas or liquid during in order to meet 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 of pressure medium or liquid in valve to the interior injection of groove 4 and 4 ' and sealed to realize.
During using liquid to realize 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
Dust stratification, the passage on valve seat are tiltedly opened along groove direction.This helps to blow down dust stratification in closing process.
In order to more be saved while ensureing and sealing, 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
Sealing is more than the problem of gas of pressure medium or liquid there is consuming energy all the time in valve with injection pressure in partial groove or groove,
In order to reduce energy consumption, in the case that pressure medium is not high in valve, a sealing medium outlet B can be opened on valve seat 2, is passed through
To sealing medium entrance A inject it is non-volatile, do not solidify, the paste medium that viscosity is suitable or viscosity is higher, such as lithium base grease, all
Intellectual circle etc., because paste medium has certain viscosity, the gap of valve seat 2 and plate 3 is minimum, in this case, Jie in valve
Matter is not easy to leak.Thus, it is not necessary to continuously inject sealing medium, seal and save so as to realize.Into this cavity
When injecting paste medium, it is necessary to discharge the air in cavity, i.e., by the sealing medium for the opposite side for corresponding to sealing medium entrance
Outlet B realizes the discharge of the gas medium or liquid medium of former sealing.
To ensure to seal, the bottom end surface of plate 3 does not contact 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 dosage of corrosion resistant high-alloy steel, the inwall of valve body 1 and/or rectangular seal cavity 5 posts
Insulating lining, then the material outside lining can use ordinary steel or performance is relatively low and steel grade that cost is relatively low.
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, it is 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 contacts 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.
Sealing gas or the pressure of 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.
It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not
This is confined to, any one skilled in the art is in the technical scope that the utility model discloses, according to this practicality
New technical scheme and inventive concept is subject to equivalent substitution or change, should all cover the scope of protection of the utility model it
It is interior.
Claims (10)
1. a kind of push-pull valve, including：Valve body, valve seat, plate, the seal cavity of the plate after opening is accommodated, drive mechanism, it is special
Sign is：
Also include two slideways parallel to each other, it is separately fixed on two madial walls of seal cavity, be connected with valve seat and
It is generally aligned in the same plane with valve seat；
The slideway and valve seat and ground are at an acute angle；
The plate is seated in the top of slideway or valve seat, and for slideway or valve seat, plate is located at the upstream of medium flow direction.
2. 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.
3. 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.
4. push-pull valve as claimed in claim 1, it is characterised in that：
Also include 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 slotting
Both sides of plate and parallel with the valve seat；
The surrounding position that the plate is corresponded on the flange sets executing agency, and the executing agency passes through corresponding on flange
The through hole of position is compressing the plate.
5. push-pull valve as claimed in claim 4, it is characterised in that：Described executing agency is straight trip stroke cylinder.
6. push-pull valve as claimed in claim 5, it is characterised in that：
On described plate, provided with more than one layer channel-section steel, each channel-section steel of the superiors occupies 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 the 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
Plate frame corresponding to distance is of substantially equal.
7. the push-pull valve as described in claim 1-6 is any, it is characterised in that：
The sealing partial groove of circle insertion is provided with the sealing surface of the valve seat, the sealing partial groove is corresponded on valve seat
Position is provided with sealing medium entrance that is vertical or being not orthogonal to groove axis.
8. push-pull valve as claimed in claim 7, it is characterised in that：
The sealing corresponded on the sealing surface of plate on the valve seat is provided with corresponding sealing partial groove with semlsulcus groove location.
9. push-pull valve as claimed in claim 7, it is characterised in that：
Corresponding sealing thereon offers sealing medium with partial groove and exported on the valve seat.
10. push-pull valve as claimed in claim 7, it is characterised in that：
The valve body and/or the inwall of seal cavity post that a circle is studded with insulating lining, or the sealing surface of the valve seat is close
Strip of paper used for sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720794766.0U CN206845948U (en) | 2017-06-24 | 2017-06-24 | Push-pull valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720794766.0U CN206845948U (en) | 2017-06-24 | 2017-06-24 | Push-pull valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206845948U true CN206845948U (en) | 2018-01-05 |
Family
ID=60804354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720794766.0U Expired - Fee Related CN206845948U (en) | 2017-06-24 | 2017-06-24 | Push-pull valve |
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| Country | Link |
|---|---|
| CN (1) | CN206845948U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218403A (en) * | 2017-06-24 | 2017-09-29 | 大连康维科技有限公司 | Push-pull valve and its encapsulating method |
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2017
- 2017-06-24 CN CN201720794766.0U patent/CN206845948U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218403A (en) * | 2017-06-24 | 2017-09-29 | 大连康维科技有限公司 | Push-pull valve and its encapsulating method |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180105 Termination date: 20210624 |