CN206845954U - Push-pull valve - Google Patents
Push-pull valve Download PDFInfo
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- CN206845954U CN206845954U CN201720794797.6U CN201720794797U CN206845954U CN 206845954 U CN206845954 U CN 206845954U CN 201720794797 U CN201720794797 U CN 201720794797U CN 206845954 U CN206845954 U CN 206845954U
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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, 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 that the plate is corresponded on the flange sets through hole and executing agency, and the executing agency through the through hole compressing the plate.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, scale effect switch or sealing on push-pull valve bite and double push-pull valve cost height and valve seat, together
When solve the problems, such as existing some species of valve seal effect difference or sealing and the sealing of some high temperature applicationss can not be ensured
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, 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 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.
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, and the superiors are every on described plate
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 plate frame is of substantially equal corresponding to the end face distance of same layer channel-section steel.This structure is equivalent to plate
Tightened together, equivalent to two fasteners of undermost each channel-section steel, further improve by a circle fastener with rectangle valve seat
Sealing effectiveness.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
On.
For slideway or valve seat, the plate is located at the downstream of medium flow direction.Because sealing surface is located at valve seat
Downstream, dust stratification, depositing contaminants, coking, fouling etc. are not easy on sealing surface.
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 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 groove is corresponded 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 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, the plate and seat compression are sealed 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 and be located at plate surrounding
One layer or two layers of 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 compresses, 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, corresponding each cylinder piston
The lower section of a channel-section steel on bar, symmetrically fix 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 compresses 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 integrally be bonded realization sealing with the area that is brought into close contact of sealing surface of seat.
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.
Further, open up the sealing partial groove of circle insertion 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 it is correspondingly arranged corresponding sealing partial groove on the sealing surface of plate simultaneously and is cut so as to form an entirety
Face is about circular sealing medium receiving space；
It is made up of using the pipe that outside introduces the sealing medium entrance to the partial groove or two partial grooves
Injection is more than the compressed gas of pressure medium or liquid in valve and sealed to realize in sealing medium receiving space.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, in this discharge outlet
On be connected to drain valve.
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 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 small by the pressure differential deltap P of sealing side, 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 average≤0.05 completely, be calculated by this gap, the flow Q=1.625m of compressed gas3/ h, folding
It is Q to be counted as normal volumeStandard=1.04X1.625=1.69Nm3/ 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. the executing agency for being used to compress plate of flange and its surrounding distribution in the utility model so that the push-pull valve
With better seal performance, zero leakage is fully achieved, solves the difficulty that zero leakage is difficult to after large scale push-pull valve deforms
Topic.
2. the utility model plate bottom lozenges structure, make plate can be wiped off during sliding up and down dust stratification or
Debris, in addition compressed air stream or liquid flow can also remove dust stratification accumulated on slideway or valve seat etc., also work as sealing medium
Entrance opposing seal contributes to blow down dust stratification or impurity in closing process when tiltedly being opened with the axis of partial groove, make it that this practicality is new
The structure of type avoids to be influenceed to seal because of the presence of impurity.In addition, in the closed state, due to the presence of compressed gas, seam
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. than double push-pull valves, the utility model is equal to and has lacked a deck valve and its various executing agencies, so as to be greatly reduced
Cost, high-alloy steel used is sufficiently expensive especially under high temperature applicationss, and such as 06Cr 25Ni20 steel, price is 4~80,000 yuan/
Ton.Further, after having insulating lining structure, relatively cheap steel grade can be used outside lining, significantly reduces system again
This is caused, 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 thermal field is closed, failed after abrasion.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
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 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 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. 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. channel-section steels 9 ', 9 " 10. gag lever post of channel-section steel, 11.
Straight trip stroke cylinder, 12. rectangular flanges, 31. lozenges
A. sealing medium entrance B. sealing mediums export
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
Positioned at the opposite side of plate 3 and parallel with rectangle valve seat 2, the surrounding of the through hole of rectangular flange 12 is distributed described in several compressions orchid 12
The executing agency of plate 3, described executing agency are straight trip stroke cylinders 11.
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 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 uses perpendicular to ground.
Further, as shown in figure 5, for there is provided the situation of two layers of channel-section steel, i.e., on described plate, corresponding 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
Each side of 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 ", 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 to the downstream of medium flow direction；Because sealing surface is located under rectangle valve seat 2
Trip, then be not easy dust stratification, depositing contaminants, coking, fouling 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, in order to wipe dust stratification on slideway 6,6 ' or the surface of valve seat 2 and debris off and prevent lower inside from accumulating
Ash influences the whereabouts of 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 schemes
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 advantageous 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 reduces, 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
The compressed gas or liquid that son inject into this groove 4 more than pressure medium in valve by A entrances 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 gas of pressure medium or liquid in valve there is what is consumed energy all the time to ask with injection pressure in partial groove 4 or groove 4
Topic, 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,
By to sealing medium entrance A inject it is non-volatile, do not solidify, the paste medium that viscosity is suitable or viscosity is higher, 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 not easy to leak.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
Envelope media outlet B realizes the discharge of 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 of medium flow direction, if it is more preferable to think that push-pull valve is realized
Sealing, reduce sealing compressed gas or liquid 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 structure as shown in Figure 4 can be used, plate 3 is seated on rectangle valve seat 2, rectangle valve
It is 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 contacts, 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 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 its 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 (6)
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 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 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.
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 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.
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 of medium flow direction.
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 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；
Or the sealing semlsulcus groove location on the valve seat is corresponded on the sealing surface of plate while is provided with corresponding sealing
Use partial groove；
Corresponding sealing thereon offers sealing medium with partial groove and exported on the valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720794797.6U CN206845954U (en) | 2017-06-24 | 2017-06-24 | Push-pull valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720794797.6U CN206845954U (en) | 2017-06-24 | 2017-06-24 | Push-pull valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206845954U true CN206845954U (en) | 2018-01-05 |
Family
ID=60804362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720794797.6U Expired - Fee Related CN206845954U (en) | 2017-06-24 | 2017-06-24 | Push-pull valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206845954U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218402A (en) * | 2017-06-24 | 2017-09-29 | 大连康维科技有限公司 | Push-pull valve and its encapsulating method |
| CN109027264A (en) * | 2018-08-04 | 2018-12-18 | 大连康维科技有限公司 | A kind of valve and its application |
-
2017
- 2017-06-24 CN CN201720794797.6U patent/CN206845954U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218402A (en) * | 2017-06-24 | 2017-09-29 | 大连康维科技有限公司 | Push-pull valve and its encapsulating method |
| CN109027264A (en) * | 2018-08-04 | 2018-12-18 | 大连康维科技有限公司 | A kind of valve and its application |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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