CN109268567A - A kind of operating method of composite multi-stage seal gate valve - Google Patents
A kind of operating method of composite multi-stage seal gate valve Download PDFInfo
- Publication number
- CN109268567A CN109268567A CN201811229345.9A CN201811229345A CN109268567A CN 109268567 A CN109268567 A CN 109268567A CN 201811229345 A CN201811229345 A CN 201811229345A CN 109268567 A CN109268567 A CN 109268567A
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- Prior art keywords
- seal
- stage
- sealing
- valve
- gate valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0227—Packings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0281—Guillotine or blade-type valves, e.g. no passage through the valve member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
Abstract
The present invention relates to valve technology fields, more particularly to a kind of operating method of composite multi-stage seal gate valve, the following steps are included: using last stage, valve plate decline stage, sealing stage and gate valve open stage, after gate valve is tightly connected with medium ingress pipe and medium efferent duct respectively；While rotary drive assembly drives valve plate to move down closing, the inner wall by sealing ring and medium runner is in sealing contact, realizes gate valve dual-seal；When gate valve is opened, elevating mechanism is rotated backward, is resetted after pushing seal disc to protrude into medium runner by boss while valve plate moves up, valve plate drives the top for being moved to valve seat through elevating mechanism, realizes that gate valve is opened；Driving transmission component movement in valve plate closing course is driven by driving assembly, while so that valve plate is contacted progress media flow closing with valve seat, seal assembly and medium runner is sealed and cooperates, realize that the high-performance of valve plate is multi-stage sealed；The technical problem of sealing reliability difference exists in the prior art in solution.
Description
Technical field
The present invention relates to valve technology field more particularly to a kind of operating methods of composite multi-stage seal gate valve.
Background technique
Gate valve is the prevention of valve plate and valve base sealing cooperation realization to fluid by moving up and down, and is being actually used
Cheng Zhong, after being blocked fluid by valve plate, fluid matasomatism is larger in the pressure on valve plate panel, so that valve plate is pressed on valve
On seat, and it is pressed on unilateral valve seat, big so as to cause the sealing element deflection for bearing side of pressure, and the sealing of the other side
Part deflection is small, and causes its sealing effect between valve plate poor since another side seal deflection is small, especially right
In the case where internal fluid pressure, fluid is through being made its deformation to the ballast of sealing element, hence between sealing element and valve plate,
So as to cause gate valve leakage.
A kind of Chinese Patent Application No. are as follows: secondary self-pressure-sealed gate valve of dual-seal disclosed in 2015210566862.It is described
A kind of secondary self-pressure-sealed secondary self-pressure-sealed gate valve of dual-seal of gate valve of dual-seal, including it is valve body, valve deck, two sealing rings, solid
Determine part, forms dual-seal pair, two sealing rings can form two seal points under the extruding of valve deck and fixing piece, relatively original
A sealing ring to be formed by seal point sealing effect under High Pressure Difference more preferable and relatively reliable.
Above scheme is on the basis of flashboard and valve base sealing, by the way that two sealing rings and fixation is arranged on valve body and valve deck
Part realizes the dual-seal of gate valve by forming dual-seal pair at valve deck；Although occurring through the above technical solution in valve seat
Under leak case, it still is able to guarantee that fluid does not leak to outside by the dual-seal richness on valve body and valve deck, however it is only
Suitable for Emergency use；After valve seat leakage, due between valve body and sealing element there are fluid so that sealing element rapid failure,
Opening and closing function is lost so as to cause gate valve；Therefore there are the technical problems of sealing reliability difference for above-mentioned technical proposal.
Summary of the invention
The purpose of the present invention is in view of the deficiencies of the prior art, provide a kind of operation of composite multi-stage seal gate valve
Method drives driving transmission component movement in valve plate closing course by driving assembly, contacts valve plate with valve seat and carry out medium
While flowing is closed, seals seal assembly and medium runner and cooperate, realize that the high-performance of valve plate is multi-stage sealed；It solves existing
There are the technical problems of sealing reliability difference in technology.
In order to solve the above technical problems, the present invention provides a kind of operating methods of composite multi-stage seal gate valve, including
Following steps:
(a) use the last stage, by the both ends of the medium runner on gate valve respectively be used for medium transmission medium ingress pipe
It is tightly connected with medium efferent duct；
(b) valve plate decline stage, the driving assembly on rotary lifting mechanism drive valve plate to move down through the driving assembly, into
While entering in valve seat, driving assembly driving transmission component is displaced downwardly in the mobile space in valve plate；
(c) stage is sealed, after step (b), while valve plate is closed, by the boss on transmission component to move up and down
After mode pushes the seal disc on seal assembly to enter in medium runner, seal disc returns after separating with boss, passes through seal disc
Inner wall with dynamic seal ring and medium runner is in sealing contact, realizes gate valve dual-seal；
(d) gate valve open stage rotates backward elevating mechanism, passes through the elevating lever on transmission component while valve plate moves up
It drives boss to move up, pushes seal disc to protrude into the mounting hole being reset on plate body after medium runner by boss, valve plate is through rising
Descending mechanism drives the top for being moved to valve seat, realizes that gate valve is opened.
Wherein, the transmission component move down speed be V, driving assembly drive valve plate move down speed be v, and the two it
Between V > v.
In addition, the seal disc pushes the slide bar on seal assembly to stretch in medium runner by boss, pass through sealing
The elastic force of return spring on component, which resets, to be returned.
Secondly, the sealing ring passes through seal disc in resetting return course, pressurizes, make close to the fluid in sealing space
Seal expansion realizes that the inner wall of sealing ring and medium runner is in sealing contact.
As an improvement, step (c) further includes pressurization stages, while the seal disc is stretched in medium runner, pass through
Pressurizing pack on valve plate pressurizes to fluid with the motion mode opposite with fluid flow direction, passes through the reversed pressure of fluid
Power effect keeps the sealing plate on pressurizing pack mobile, and for fluid after the conduction hole on pressurizing pack enters in mobile space, sealing plate is multiple
Position closed drainage hole.
Wherein, the compression piece on pressurizing pack is shunk while the sealing plate compresses it by fluid, passes through compression
Resilient force sealing plate after part is shunk resets, closed drainage hole.
As an improvement, step (d) further includes the pressure release stage, moved during stretching to medium runner by the seal disc
Pressure reduction in dynamic space after sealing ring elasticity is restored, is connected to inside mobile space and medium runner, realizes in mobile space
The pressure release in portion.
Beneficial effects of the present invention:
(1) the driving seal assembly movement while present invention drives valve plate lifting by driving assembly, realizes that valve plate closes
Seal assembly and medium runner inner wall form the secondary seal to medium runner during conjunction, while reducing seat pressure, lead to
Crossing contact sealing fit system of the seal assembly with medium runner reduces fluid to the pressure of valve plate, and then reduces valve plate to valve seat
Pressure, improve valve base seal property；The technical problem of sealing reliability difference exists in the prior art in solution.
(2) it is arranged in the present invention by the special construction of driving assembly and transmission component, the process of rotate driving component
The operating of middle driving transmission component is realized between the lifting speed of elevating lever and the lifting speed of valve plate there are speed difference, and elevating lever
Lifting speed be greater than valve plate lifting speed, and then realize valve plate dropping process in seal assembly to the close of medium runner inner wall
In envelope and valve plate opening process, seal disc is synchronized after entering in valve plate and is moved up, and realizes seal assembly between medium runner two
The quick formation of grade sealing.
(3) it is arranged in the present invention by the special construction of seal assembly and pressurizing pack, seal assembly is made to enter medium
During runner, by fluid to the pressure of sealing plate, enter it in mobile space through mounting hole and conduction hole respectively, improves stream
Body enters the speed in mobile space；In conjunction with the motion mode of seal disc, the Fluid pressure in mobile space and medium runner is flat
After weighing apparatus, sealing plate resets it through compression piece effect to seal with conduction hole, and seal assembly is driven with elastic force to being in through return spring
While fluid in mobile space is compressed, pressurizeed by fluid to sealing plate, and then improve sealing plate and conduction hole
While leakproofness, the fast sealing of the inner wall of sealing ring and medium runner is realized, and then realize of the invention multi-stage sealed, mention
High sealing performance of the invention.
In conclusion the present invention has many advantages, such as that mechanism is reasonable, construction is quick, assembly is accurate；More particularly to it is a kind of compound
The operating method of the multi-stage sealed gate valve of type.
Detailed description of the invention
It, below will be to required use in embodiment description for the clearer technical solution for illustrating the embodiment of the present invention
Attached drawing be briefly described, it should be apparent that, drawings discussed below is only some embodiments of the present invention, for ability
For the those of ordinary skill in domain, without creative efforts, it is attached to can also be obtained according to these attached drawings other
Figure.
Fig. 1 is the method for the present invention flow chart；
Fig. 2 is overall structure of the present invention；
Fig. 3 is side view cutaway drawing of the present invention；
Fig. 4 is valve plate overall mechanism schematic diagram；
Fig. 5 is valve plate front view；
Fig. 6 is A-A sectional view in Fig. 5；
Fig. 7 is driving assembly section view partial enlargement diagram；
Fig. 8 is driving member partial enlargement structural representation；
Fig. 9 is seal assembly section view partial enlargement diagram.
Specific embodiment
Technical solution in the embodiment of the present invention is clearly and completely illustrated with reference to the accompanying drawing.
Embodiment one
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The operation side of one of the present embodiment composite multi-stage seal gate valve described according to Figure of description 1, including with
Lower step:
(a) last stage is used, the both ends of the medium runner 11 on gate valve 1 are imported with the medium for being used for medium transmission respectively
Pipe and medium efferent duct are tightly connected；
(b) valve plate decline stage, the driving assembly 51 on rotary lifting mechanism 5 drive under valve plate 4 through the driving assembly 51
Move, into valve seat 2 in while, driving assembly 51 drive transmission component 52 be displaced downwardly in the mobile space 414 in valve plate 4；
(c) stage is sealed, after step (b), while valve plate 4 is closed, passes through 522 or more boss on transmission component 52
After lower motion mode pushes the seal disc 4122 on seal assembly 412 to enter in medium runner 11, seal disc 4122 and boss 522
It is returned after separation, it is in sealing contact with dynamic seal ring 4123 and the inner wall of medium runner 11 by seal disc 4122, realize that gate valve is double
Resealing；
(d) gate valve open stage rotates backward elevating mechanism 5, passes through the liter on transmission component 52 while valve plate 4 moves up
Drop bar 521 drives boss 522 to move up, and pushes seal disc 4122 to protrude into after medium runner 11 by boss 522 and is reset to plate body 411
On mounting hole 4111 in, valve plate 4 drives through elevating mechanism 5 and is moved to the top of valve seat 2, realizes that gate valve is opened.
Wherein, the speed that moves down of the transmission component 52 is V, and it is v that driving assembly 51, which drives the speed that moves down of valve plate 4, and
V > v between the two；It is arranged by the differential of transmission component 52 and driving assembly 51, it is close in 4 closing course of valve plate when making to close lock
Closing disk 4122 enters in medium runner 11；During valve plate 4 moves up when opening a sluice gate in seal disc 4122 Rapid reset to valve plate 4.
In addition, the seal disc 4122 pushes the slide bar 4121 on seal assembly 412 to stretch to medium flow field by boss 522
In road 11, is resetted and returned by the elastic force of the return spring 4124 on seal assembly 412；In the present embodiment, 522 or more boss
Lower move mode and 412 discontinuous connection of seal assembly, boss 522 push seal disc 4122 to protrude into rear and its point in medium runner 11
From.
Secondly, the sealing ring 4123 passes through seal disc 4122 in resetting return course, to the fluid in sealing space
Pressurization expands sealing ring 4123, realizes that sealing ring 4123 and the inner wall of medium runner 11 are in sealing contact.
Embodiment two
Appended drawing reference corresponding with embodiment one wherein is used with component identical or corresponding in embodiment one, is risen to be easy
See, hereafter only describes the distinctive points with embodiment one；The embodiment two and embodiment one the difference is that: step (c) is also
Including pressurization stages, while the seal disc 4122 is stretched in medium runner 11, pass through the pressurizing pack 413 on valve plate 4
It is pressurizeed with the motion mode opposite with fluid flow direction to fluid, pressurizing pack is made by the buffer brake effect of fluid
Sealing plate 4132 on 413 is mobile, and fluid is after the conduction hole 4131 on pressurizing pack 413 enters in mobile space 414, sealing plate
4132 reset closed drainage hole 4131.
Wherein, the compression piece 4133 on pressurizing pack 413 is received while the sealing plate 4132 compresses it by fluid
Contracting, the resilient force sealing plate 4132 after being shunk by compression piece 4133 reset, closed drainage hole 4131.
Further, step (d) further includes the pressure release stage, and the mistake of medium runner 11 is stretched to by the seal disc 4122
Pressure reduction in journey in mobile space 414, after 4123 elasticity of sealing ring is restored, inside mobile space 414 and medium runner 11
The pressure release inside mobile space 414 is realized in connection.
Embodiment three
One of the present embodiment composite multi-stage seal gate valve is described according to Figure of description 2 to 9.
As shown in Fig. 2 to 6, a kind of composite multi-stage seal gate valve, including valve body 1, the valve seat 2 being set in the valve body 1
And it is installed on the lid 3 on the valve body 1, further includes:
Valve plate 4, the valve plate 4 are installed in the valve seat 2 in symmetrical structure comprising mainboard 41 and are connected with the mainboard 41
The subplate 42 connect, the mainboard 41 include plate body 411, be set on the plate body 411 and with the medium runner 11 on the valve body 1
The seal assembly 412 being equipped with and the pressurizing pack 413 with the intermittent communicated setting of the medium runner 11, the seal assembly
The mobile space 414 of the pressurizing pack 413 movement is formed between 412 and the subplate 42；And
Elevating mechanism 5, the elevating mechanism 5 include being set to the drive for driving the valve plate 4 to move up and down on the lid 3
Dynamic component 51 and the transmission component for driving seal assembly 412 to stretch to the medium runner 11 that is connected with the driving assembly 51
52；In the present embodiment, transmission component 52 drives flashboard 4 to move down and move down in fluid closing process through driving assembly 51, with
It pushes away low mode and pushes seal assembly 412 with the direction opposite with fluid flow direction, conveyed the fluid to through pressurizing pack 413
After in mobile space 414, then sealed component 412 compresses the fluid in mobile space 414, by fluid to close
The reaction force of sealing assembly 412 cooperates the inner wall sealing of itself and medium runner 11, realizes seal assembly 412 to the two of fluid
Grade sealing, to reduce fluid to the pressure of valve seat 2, it is ensured that sealing reliability of the invention.
Wherein, as shown in figure 3, the valve plate 4 is located between the valve seat 2 in symmetrical structure setting and in sealing contact sets with its
It sets, the driving component 51 is connected through the lid 3 with the valve plate 4 along the vertical direction with the transmission component 52,
In the present invention, transmission component 52 is connected with valve plate 4 with rotating manner, passes through the worm drive side of transmission component 52 and lid 3
Formula makes to drive valve plate 4 to move up and down during 52 positive and negative rotation of transmission component.
In addition, as shown in figure 3, the transmission component 52 is set to its inside through the driving component 51 and extends to institute
It states interruption in mobile space 414 and drives 412 displacement of seal assembly, the lifting speed V of the transmission component 52 and drive
Between the lifting speed v of dynamic component 51, V > v；In the present embodiment, by driving assembly 51 drive valve plate move down to fluid into
When row is closed, driving assembly 51 drives transmission component 52 to move down, after seal assembly 412 enters in medium runner 11, through transmission group
Part 52 is in sealing contact with its inner wall after being driven into medium runner 11；In 4 opening process of flashboard, driven by driving assembly 51
It drives transmission component 52 to push seal assembly 412 while flashboard 4 moves up, separates it with the inner wall of medium runner 11
After entering in plate body 411 afterwards, moved up through the drive of flashboard 4.
Further, as shown in FIG. 7 and 8, the driving component 51 include be rotatably dispose on the lid 3 and with it is described
The transmission shaft 511 and be fixedly installed on 511 top of transmission shaft and be connected with the transmission component 52 that subplate 42 is rotatablely connected
Driving member 512, the driving member 512 and the subplate 42 are located at the both ends of the transmission shaft 511, the driving member
512 are fixedly connected with and are located at the outside of the lid 3 with the transmission shaft 511.
Wherein, as shown in FIG. 7 and 8, the driving member 512 includes in horizontally disposed turntable 5121, is fixedly installed on this
Gear ring 5122 in turntable 5121 and the multiplying wheel 5123 and driving wheel 5124 being rotatably dispose on the turntable 5121, the drive
Driving wheel 5124 and multiplying wheel 5123 are respectively positioned on the inside of the gear ring 5122 and driving wheel 5124 and gear ring 5122 and transmission shaft 511
Coaxial arrangement, the gear ring 5122, multiplying wheel 5123 and driving wheel 5124 are successively sequentially connected；In the present embodiment, pass through tooth
Circle 5122, multiplying wheel 4123 and driving wheel 5124 form planetary gear auxiliary structure, to realize that the revolving speed of transmission shaft 511 is less than driving
The revolving speed of wheel 5124, and then the speed that moves up and down of elevating lever 521 is made to move up and down speed greater than transmission shaft 511.
Further, as shown in Fig. 3,7 and 8, the transmission component 52 include across the driving wheel 5124 and and its with
The elevating lever 521 and be set to the lower end of the elevating lever 521 and the boss of arc-shaped structure that screw-driven mode is connected
522, the light driving of driving wheel 5124 of the elevating lever 521 moves up and down, the seal assembly 412 through the boss 522 with
Pushing tow mode drives movement；In the present embodiment, elevating lever 521 is slidingly sealed with subplate 42 and is equipped with, and passes through fixed setting
Boss 522 in 521 lower end of elevating lever drives 413 horizontal orientation of pressurizing pack mobile in the process of moving up and down.
In the present invention, as shown in Fig. 3,7 and 8, it is arranged by the special construction of driving assembly 51 and transmission component 52, is made
It drives transmission component 52 to operate during rotate driving component 51, realizes the lifting speed of elevating lever 521 and the lifting of valve plate 4
There are speed differences between speed, and the lifting speed of elevating lever 521 is greater than the lifting speed of valve plate 4, and then realize that valve plate 4 fell
For seal assembly 412 in 4 opening process of sealing and valve plate of 11 inner wall of medium runner, seal assembly 412 enters mainboard in journey
It is moved up through the drive of subplate 42 in 41, realizes that seal assembly 412 to the quick secondary seal of medium runner 11, and then reduces and reduces stream
Body improves sealing effect of the invention to 2 pressure of valve seat.
Further, as shown in Figs. 4-6, the plate body 411 be square and be arranged along the vertical direction and plate knot
Structure, center offer the mounting hole 4111 for installing the seal assembly 412.
Further, as shown in figs. 5 and 9, the seal assembly 412 rectangular is slideably positioned in the subplate 42 along horizontal
On comprising the slide bar 4121 that is slideably positioned on the subplate 42 is fixedly installed on the end of the slide bar 4121 and far from secondary
Plate 42 and the mounting hole 4111 are slidingly sealed the seal disc 4122 being equipped with, the circumference for being fixedly installed on the seal disc 4122
It the sealing ring 4123 that extends on face and to 4121 direction of slide bar and is sheathed on the slide bar 4121 and drives the sealing
The return spring 4124 that disk 4122 resets；The sealing ring 4123 is flexible material setting；In the present embodiment, pass through elevating lever
Boss 522 on 521 pushed after being contacted with the end of slide bar 4121 its move horizontally separated with mounting hole 4111 after enter medium
Fluid enters in mobile sky 414 in runner 11；After boss 522 is separated with slide bar 4121, restored by return spring 4124 with elasticity
Power drive seal disc 4122 compresses the fluid in sealing ring 4123 during resetting, by fluid to sealing ring
4123 reaction force expands sealing ring 4123, by the fluid in mobile space 414 to the pressure of sealing ring 4123
Power effect realizes that the sealing of sealing ring 4123 and 11 inner wall of medium runner cooperates；Conversely, passing through boss in 4 lifting process of valve plate
522 move up during driving slider 4121 it is mobile, be connected to mobile space 414 with medium runner 11, realization is to sealing ring 4123
Pressure release while, medium runner 11 opened in 4 lifting process of valve plate be in the fluid in mobile space 414 and flow out, sealing group
Part 412 is after the elasticity of return spring 4124 is restored to make it into mounting hole 4111 and cooperates with the sealing of plate body 411, through subplate 42
Drive moves up.
Further, as shown in Fig. 4,6 and 9, the subplate 42 is identical as the contour structures of the mainboard 41 comprising edge
Vertical direction opens up the through-hole 421 passed through thereon through the transmission component 52 and fixed setting thereon and in mobile empty
Between the mounting bases 422 that are equipped with the slide bar 4121 in 414, the slide bar 4121 passes through the mounting base 422 and the biography
Dynamic 52 discontinuous connection of component.
Further, as shown in Figure 6 and 9, the pressurizing pack 413 is set on the seal disc 4122 and at least one
It is a comprising to open up and be connected to the medium runner 11 and the conduction hole 4131 of mobile space 414 and the conduction hole 4131 thereon
The sealing plate 4132 and cooperated with the elastic power drive sealing plate 4132 and the conduction hole 4131 sealing that interruption sealing is equipped with
Compression piece 4133；In the present embodiment, compression piece 4133 is spring setting, and seal assembly 412 enters 11 process of medium runner
In, compression assembly 4133 separates sealing plate 4132 with conduction hole 4131 through ballast of the fluid to it, fluid through conduction hole 4131 into
Enter in mobile sky 414, in conjunction with the motion mode of seal disc 4122, improves fluid and enter the speed in mobile space 414, it is mobile empty
Between 414 with medium runner 11 in fluid pressure balance after, sealing plate 4132 through compression piece 4133 effect make its reset and conduction hole
4131 sealings, seal assembly 412, which is driven through return spring 4124 with elastic force, compresses the fluid in mobile space 414
While, it is pressurizeed by fluid to sealing plate 4132, and then improve the leakproofness of sealing plate 4132 and conduction hole 4131.
In the present invention, it is to be understood that: term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness
Degree ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " clockwise ",
The orientation or positional relationship of instructions such as " counterclockwise " are to be based on the orientation or positional relationship shown in the drawings, and are merely for convenience of retouching
State the present invention and simplify description, rather than the equipment of indication or suggestion meaning or element must have specific orientation, Yi Te
Fixed orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply opposite important
Property or implicitly indicate the quantity of indicated technical characteristic.Therefore, define " first ", the feature of " second " can be expressed or
Person implicitly includes one or more of the features.In description of the invention, the meaning of " plurality " is two or two with
On, unless otherwise specifically defined.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any changes or substitutions that can be easily thought of under technical clarification of the invention by anyone skilled in the art, such as passes through
Driving assembly drives driving transmission component movement in valve plate closing course, contacts valve plate with valve seat and carries out media flow closing
Meanwhile seal seal assembly and medium runner and cooperating, it realizes the multi-stage sealed design concept of the high-performance of valve plate, should all cover
Within protection scope of the present invention.Therefore, the scope of protection of the invention shall be subject to the scope of protection specified in the patent claim.
Claims (7)
1. a kind of operating method of composite multi-stage seal gate valve, which comprises the following steps:
(a) last stage is used, the both ends of the medium runner (11) on gate valve (1) are imported with the medium transmitted for medium respectively
Pipe and medium efferent duct are tightly connected；
(b) valve plate decline stage, the driving assembly (51) on rotary lifting mechanism (5) drive valve plate through the driving assembly (51)
(4) it moves down, while interior into valve seat (2), driving assembly (51) driving transmission component (52) is displaced downwardly to the movement in valve plate (4)
In space (414)；
(c) seal the stage, after step (b), valve plate (4) be closed while, by the boss (522) on transmission component (52) with
After up and down motion mode pushes the seal disc (4122) on seal assembly (412) to enter in medium runner (11), seal disc
(4122) it is returned after being separated with boss (522), by seal disc 4122 with the interior of dynamic seal ring (4123) and medium runner (11)
Wall is in sealing contact, realizes gate valve dual-seal；
(d) gate valve open stage rotates backward elevating mechanism (5), by transmission component (52) while valve plate (4) moves up
Elevating lever (521) drives boss (522) to move up, after pushing seal disc (4122) to protrude into medium runner (11) by boss (522)
It is reset to the mounting hole (4111) on plate body (411) Nei, valve plate (4) drives through elevating mechanism (5) and is moved to the upper of valve seat (2)
Side realizes that gate valve is opened.
2. a kind of operating method of composite multi-stage seal gate valve according to claim 1, which is characterized in that the transmission
The speed that moves down of component (52) is V, and driving assembly (51) drive valve plate (4) moves down speed as v, and V > v between the two.
3. a kind of operating method of composite multi-stage seal gate valve according to claim 1, which is characterized in that the sealing
Disk (4122) pushes the slide bar (4121) on seal assembly (412) to stretch in medium runner (11) by boss (522), passes through
The elastic force of return spring (4124) on seal assembly (412), which resets, to be returned.
4. a kind of operating method of composite multi-stage seal gate valve according to claim 3, which is characterized in that the sealing
(4123) are enclosed through seal disc (4122) in resetting return course, to the fluid pressurization in sealing space, make sealing ring
(4123) it expands, realizes that sealing ring (4123) and the inner wall of medium runner (11) are in sealing contact.
5. a kind of operating method of composite multi-stage seal gate valve according to claim 1, which is characterized in that step (c)
Further include pressurization stages, the seal disc (4122) stretch to medium runner (11) it is interior while, pass through the pressurization on valve plate (4)
Component (413) pressurizes to fluid with the motion mode opposite with fluid flow direction, is acted on by the buffer brake of fluid
Keep the sealing plate (4132) on pressurizing pack (413) mobile, fluid enters movement through the conduction hole (4131) on pressurizing pack (413)
After in space (414), sealing plate (4132) resets closed drainage hole (4131).
6. a kind of operating method of composite multi-stage seal gate valve according to claim 5, which is characterized in that the sealing plate
(4132) compression piece (4133) on pressurizing pack (413) is shunk while compression by fluid to it, passes through compression piece
(4133) the resilient force sealing plate (4132) after shrinking resets, closed drainage hole (4131).
7. a kind of operating method of composite multi-stage seal gate valve according to claim 1, which is characterized in that step (d)
It further include the pressure release stage, mobile space (414) is interior during stretching to medium runner (11) by the seal disc (4122)
Pressure reduction be connected to inside mobile space (414) and medium runner (11) after sealing ring (4123) elasticity is restored, realization shifting
Dynamic space (414) internal pressure release.
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| CN201811229345.9A CN109268567A (en) | 2018-10-22 | 2018-10-22 | A kind of operating method of composite multi-stage seal gate valve |
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| CN201811229345.9A CN109268567A (en) | 2018-10-22 | 2018-10-22 | A kind of operating method of composite multi-stage seal gate valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113374878A (en) * | 2021-07-23 | 2021-09-10 | 北京航天鸣镝科技有限公司 | Eccentric disc type turnover reciprocating control mechanism suitable for multiple fluid media |
-
2018
- 2018-10-22 CN CN201811229345.9A patent/CN109268567A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113374878A (en) * | 2021-07-23 | 2021-09-10 | 北京航天鸣镝科技有限公司 | Eccentric disc type turnover reciprocating control mechanism suitable for multiple fluid media |
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