CN110410573A - A kind of valve stem seal mechanism - Google Patents
A kind of valve stem seal mechanism Download PDFInfo
- Publication number
- CN110410573A CN110410573A CN201910845904.7A CN201910845904A CN110410573A CN 110410573 A CN110410573 A CN 110410573A CN 201910845904 A CN201910845904 A CN 201910845904A CN 110410573 A CN110410573 A CN 110410573A
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- CN
- China
- Prior art keywords
- valve
- valve stem
- static
- seal
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 124
- 230000003068 static effect Effects 0.000 claims abstract description 45
- 230000000694 effects Effects 0.000 claims abstract description 10
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 210000004907 gland Anatomy 0.000 description 12
- 239000012530 fluid Substances 0.000 description 7
- 239000000945 filler Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000977 initiatory effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a kind of valve stem seal mechanisms, including the compensation sealing mechanism for sealed valve stem and valve deck, compensation sealing mechanism includes dynamic sealing device and static seal device, the static seal device is located at the top of dynamic sealing device, present inventive concept is ingenious, it is structurally reasonable, the upper surface of dynamic sealing device and the lower end surface kissing of static seal device are combined into axial seal pair, and axial seal pair end face can also be made to remain at optimal seal state, ensure sealing effect, and the sealing structure integrally consolidates, zero leakage, service free, overall structure is simple, it is easily manufactured, manufacturing cost and use cost can be greatly reduced.
Description
Technical field
The present invention relates to a kind of sealing mechanisms, and specifically, it is simple to be related to a kind of structure, service free, the valve of zero leakage
Bar sealing mechanism, belongs to valve technology field.
Background technique
Shut-off valve is also pipe valve, is a kind of by valve stem pressure, fits closely valve clack sealing surface with sealing surface of seat,
Prevent flow of media and only allow an a kind of valve for medium one-way flow, because its during opening and closing frictional force between sealing surface
Small, relatively durable, Lift is little, and manufacture is easy, easy to maintenance, so being that mesolow and height are widely applied in industrial production
One of pressure ring border valve.
And traditional shut-off valve makes must have one when installation because shut-off valve is only permitted medium one-way flow in use
Fixed directionality so that the structure length of shut-off valve is greater than gate valve, while being influenced by fluid resistance is big, and shut-off valve is long-term
When operation, it is easy because sealing is corrupted such that pipeline valve external leakage at valve rod and stuffing-box.
To solve the above-mentioned problems, occurs a kind of shut-off valve, such as Patent No.: 201510533529.4 disclosures on the market
A kind of shut-off valve, including valve body, valve rod, valve deck, flap, pressure cap and handwheel, the valve body are equipped with the import of flow of media, go out
Mouthful and valve port, valve body top and bonnet lower be tightly connected, flap is placed in valve body valve chamber loaded on valve rod lower end, and with valve port phase
Corresponding, valve rod upper end passes through valve deck and pressure cap, and connect with handwheel, and filler, valve deck are equipped between valve deck upper inside wall and valve rod
Top and pressure cap are tightly connected, and a washer is equipped between pressure cap and filler.
The sealing structure of such above-mentioned valve is implemented for sealing, but the stuffing-box of such sealing structure is to pass through pressure
Cap or gland generate squeezing action, so that radial hold valve rod tightly, reduce the gap of filler and valve rod to realize sealing, when long
Between worn using lower filler, cause filler pretightning force to decline, so that the gap of filler and valve rod is excessive, gas, liquid caused to overflow
Leakage is generated out.
Summary of the invention
The main technical problem to be solved in the present invention is to provide that a kind of structure is simple, and the valve rod of service free, zero leakage is close
Sealing mechanism.
In order to solve the above technical problems, the invention provides the following technical scheme:
A kind of valve stem seal mechanism, it is characterised in that: including the compensation sealing mechanism for sealed valve stem and valve deck, compensation sealing
Mechanism includes dynamic sealing device and static seal device, and the static seal device is located at the top of dynamic sealing device.
It is that the present invention advanced optimizes above-mentioned technical proposal below:
Be provided with above the static sealing ring makes static sealing ring and moves for making static sealing ring apply pressure to dynamic sealing device
What sealing device fitted closely holds down assembly.
Advanced optimize: the lower section of the static seal device and the top of dynamic sealing device coincide and form axial seal pair.
It advanced optimizes: being provided with the shaft shoulder for axially mounted dynamic sealing device on the valve rod.
Advanced optimize: the dynamic sealing device includes spring pedestal and upper cover, is connected between spring pedestal and upper cover
For making axial seal pair end face remain at the compensation device of optimal seal state.
Advanced optimize: the compensation device includes spring, and upper end and the upper cover of spring offset, the lower end of spring and spring
Pedestal offsets.
Advanced optimize: being fixedly installed the sealing ring for improving sealing effect above the upper cover, sealing ring with
Static seal device contact.
Advanced optimize: the lower end of the spring pedestal and be located at dynamic sealing device inner wall on be fixedly installed gum cover.
Advanced optimize: the diameter of bore of the gum cover is less than the outside diameter that valve rod is located at valve rod above the shaft shoulder.
Advanced optimize: described to hold down assembly including the pressure cap above static sealing ring is arranged in, pressure cap is set on valve rod
And it is connected through a screw thread with the upper port of valve deck.
By adopting the above technical scheme, when in use, which is suitable for the close of a variety of valve rods to the present invention
Envelope, such as: block valve class, regulating valve class, flow divider class, multipurpose valve class etc. can specifically join common section of the one kind provided as follows
Only valve, the overall structure of existing shut-off valve include valve body, valve deck, valve rod, flap valve, fluid inlet and fluid outlet.
When being sealed using the valve stem seal mechanism to valve rod, dynamic sealing device is sleeved on valve rod and is passed through first
The shaft shoulder realizes the fixed installation to dynamic sealing device, and static seal device is then mounted on the lower end of pressure cap then by pressure cap screw thread
It is connected in the upper port of valve deck, makes the upper end tight connecting of static seal device and dynamic sealing device and dynamic sealing device is applied
Pressure initiation axial seal pair realizes sealing.
The present invention by adopting the above technical scheme, is skillfully constructed, structurally reasonable, and the upper surface of dynamic sealing device and static seal fill
The lower end surface kissing set is combined into axial seal pair, and axial seal pair end face can also be made to remain at optimal seal shape
State, it is ensured that sealing effect, and the sealing structure integrally consolidates, zero leakage, and service free, overall structure is simple, and it is easily manufactured,
Manufacturing cost and use cost can be greatly reduced.
Present invention will be further explained below with reference to the attached drawings and examples.
Detailed description of the invention
Fig. 1 is the general structure schematic diagram of the embodiment of the present invention 1；
Fig. 2 is the structural schematic diagram of valve rod in the embodiment of the present invention 1；
Fig. 3 is the structural schematic diagram of dynamic sealing device in the embodiment of the present invention 1；
Fig. 4 is the shut-off valve that the valve stem seal mechanism is applied in the embodiment of the present invention 1；
Fig. 5 is the structural schematic diagram to hold down assembly in the embodiment of the present invention 2.
In figure: 2- static seal device；21- static sealing ring；3- compensation sealing mechanism；4- dynamic sealing device；41- spring bottom
Seat；42- upper cover；43- spring；44- gum cover；45- sealing ring；5- valve rod；6- valve deck；8- valve body；9- flap valve；10- pressure cap；14-
The shaft shoulder；15- fluid inlet；16- fluid outlet；17- gland；18- gland bolt；19- sealing shroud.
Specific embodiment
Embodiment 1: please referring to Fig. 1-4, and a kind of valve stem seal mechanism is close including the compensation for sealed valve stem 5 and valve deck 6
Sealing mechanism 3, compensation sealing mechanism 3 include dynamic sealing device 4 and static seal device 2, and the static seal device 2 is located at dynamic sealing dress
Set 4 top.
The lower section of the static seal device 2 and the top of dynamic sealing device 4 coincide and form axial seal pair, are used for sealing valve
Bar.
The static seal device 2 is static sealing ring 21.
The top of the static sealing ring 21 is provided with quiet close for making static sealing ring 21 to the application of dynamic sealing device 4 pressure
Seal 21 holds down assembly with what dynamic sealing device 4 fitted closely.
It designs in this way, drives static sealing ring 21 to make static sealing ring 21 to the application of dynamic sealing device 4 pressure by holding down assembly
It fits closely to form axial seal with dynamic sealing device 4, and then realizes the sealing to valve rod 5.
The shaft shoulder 14 being internally provided with for axially mounted dynamic sealing device 4 on the valve rod 5 and positioned at valve deck 6.
It designs in this way, by the shaft shoulder 14, can be realized on valve rod 5 and dynamic sealing device 4 is fixedly mounted.
The dynamic sealing device 4 includes the spring pedestal 41 and upper cover 42 of setting symmetrical above and below and flexible connection, the bullet
The compensation dress for making axial seal pair end face remain at optimal seal state is connected between spring pedestal 41 and upper cover 42
It sets.
It designs, the dynamic sealing device 4 can be fixedly mounted on the shaft shoulder 14 by spring pedestal 41, and then pass through in this way
It holds down assembly and static sealing ring 21 is driven to fit closely static sealing ring 21 with dynamic sealing device 4 application of dynamic sealing device 4 pressure
Axial seal is formed, and axial seal pair end face can be made to remain at optimal seal state by compensation device, it is ensured that
Sealing effect.
The compensation device includes spring 43, and upper end and the upper cover 42 of the spring 43 offset, the lower end of the spring 43
It offsets with spring pedestal 41.
It designs in this way, static sealing ring 21 can be driven to apply pressure to dynamic sealing device 4 by holding down assembly, make spring 43
Forced compression, and then axial seal is made by the elastic force of spring 43, improve sealing effect.
It, can be by the elastic force of spring 43, to the abrasion when static sealing ring 21 between dynamic sealing device 4 to wearing
Gap compensates, and so that axial seal pair end face is remained at optimal seal state, it is ensured that sealing effect.
The top of the upper cover 42 is fixedly installed the sealing ring 45 for improving sealing effect, the static sealing ring 21 with
Sealing ring 45 contacts, and improves sealing effect.
The lower end of the spring pedestal 41 and be located at dynamic sealing device 4 inner wall on be fixedly installed gum cover 44, the glue
The diameter of bore of set 44 is less than the outside diameter that valve rod 5 is located at 14 top valve rod 5 of the shaft shoulder.
It designs in this way, gum cover 44 can be led to by the dynamic sealing device 4 and be strapped in valve rod 5, and pass through the cooperation of the shaft shoulder 14
It realizes the fixed installation to the dynamic sealing device 4, improves fixed effect.
Described to hold down assembly including the pressure cap 10 that 21 top of static sealing ring is arranged in, the pressure cap 10 is set on valve rod 5
And it is connected through a screw thread with the upper port of valve deck 6.
The static sealing ring 21 is mounted on pressure cap 10.
It designs in this way, the threaded connection between pressure cap 10 and valve deck 6 can be led to, 21 moving contact of static sealing ring can be driven
The sealing ring 45 of dynamic sealing device 4, and pressure can also be applied to dynamic sealing device 4, make 43 forced compression of spring.
Embodiment 2: as shown in figure 5, in above-described embodiment 1, described hold down assembly can also be using structure shown in Fig. 5, institute
It states to hold down assembly and is set in its lower end on valve rod 5 including gland 17, the gland 17 static sealing ring 21, the gland 17 are installed
Top be located at the outer cover of valve rod 5 and be equipped with sealing shroud 19, be movably set with multiple gland bolts 18 on the valve deck 6, it is described
Gland bolt 18 extends through gland 17, sealing shroud 19 far from one end of valve deck 6 and is threaded with nut.
It designs in this way, the threaded connection band movable sealing sleeve 19 of nut and gland bolt 18 can be passed through by rotating nut
Gland 17 is pushed close to valve deck 6, and then gland 17 drives the sealing ring 45 of 21 moving contact dynamic sealing device 4 of static sealing ring, and
And be rotated further by nut can to dynamic sealing device 4 apply pressure, make 43 forced compression of spring, so make axial seal pair end face begin
It is maintained at optimal seal state eventually.
When in use, which is suitable for the sealing of a variety of valve rods, such as: block valve class, regulating valve
Class, flow divider class, multipurpose valve class etc. specifically refer to the common shut-off valve of one kind shown in Fig. 4, the entirety of existing shut-off valve
Structure includes valve body 8, valve deck 6, valve rod 5, flap valve 9, fluid inlet 15 and fluid outlet 16.
When being sealed using the valve stem seal mechanism to valve rod 5, dynamic sealing device 4 is sleeved on valve rod 5 simultaneously first
The fixed installation to dynamic sealing device 4 is realized by the shaft shoulder 14, then then static seal device 2 is mounted on the lower end of pressure cap 10
Pressure cap 10 is threaded in the upper port of valve deck 6, makes the upper end tight connecting of static seal device 2 and dynamic sealing device 4 simultaneously
Pressure initiation axial seal pair is applied to dynamic sealing device 4, realizes sealing.
For the ordinary skill in the art, introduction according to the present invention, do not depart from the principle of the present invention with
In the case where spirit, changes, modifications that embodiment is carried out, replacement and variant still fall within protection scope of the present invention it
It is interior.
Claims (10)
1. a kind of valve stem seal mechanism, it is characterised in that: the compensation sealing mechanism including being used for sealed valve stem (5) and valve deck (6)
(3), compensation sealing mechanism (3) includes dynamic sealing device (4) and static seal device (2), and the static seal device (2) is close positioned at moving
The top of seal apparatus (4).
2. a kind of valve stem seal mechanism according to claim 1, it is characterised in that: set above the static sealing ring (21)
Be equipped with keeps static sealing ring (21) and dynamic sealing device (4) tight for making static sealing ring (21) apply pressure to dynamic sealing device (4)
Closely connected conjunction holds down assembly.
3. a kind of valve stem seal mechanism according to claim 2, it is characterised in that: the lower section of the static seal device (2)
It coincide with the top of dynamic sealing device (4) and forms axial seal pair.
4. a kind of valve stem seal mechanism according to claim 3, it is characterised in that: be provided with and be used on the valve rod (5)
The shaft shoulder (14) of axially mounted dynamic sealing device (4).
5. a kind of valve stem seal mechanism according to claim 4, it is characterised in that: the dynamic sealing device (4) includes bullet
Spring pedestal (41) and upper cover (42), are connected with for making axial seal pair end face always between spring pedestal (41) and upper cover (42)
It is maintained at the compensation device of optimal seal state.
6. a kind of valve stem seal mechanism according to claim 5, it is characterised in that: the compensation device includes spring
(43), the upper end of spring (43) offsets with upper cover (42), and lower end and the spring pedestal (41) of spring (43) offset.
7. a kind of valve stem seal mechanism according to claim 6, it is characterised in that: the top fixation of the upper cover (42) is set
It is equipped with the sealing ring (45) for improving sealing effect, sealing ring (45) is contacted with static seal device (2).
8. a kind of valve stem seal mechanism according to claim 7, it is characterised in that: the lower end of the spring pedestal (41) and
Gum cover (44) are fixedly installed on the inner wall of dynamic sealing device (4).
9. a kind of valve stem seal mechanism according to claim 8, it is characterised in that: the diameter of bore of the gum cover (44) is small
It is located at the outside diameter of valve rod (5) above the shaft shoulder (14) in valve rod (5).
10. a kind of valve stem seal mechanism according to claim 9, it is characterised in that: described hold down assembly exists including setting
Pressure cap (10) above static sealing ring (21), pressure cap (10) are set on valve rod (5) and pass through spiral shell with the upper port of valve deck (6)
Line connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910845904.7A CN110410573A (en) | 2019-09-09 | 2019-09-09 | A kind of valve stem seal mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910845904.7A CN110410573A (en) | 2019-09-09 | 2019-09-09 | A kind of valve stem seal mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110410573A true CN110410573A (en) | 2019-11-05 |
Family
ID=68370221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910845904.7A Withdrawn CN110410573A (en) | 2019-09-09 | 2019-09-09 | A kind of valve stem seal mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110410573A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115962294A (en) * | 2022-12-28 | 2023-04-14 | 黄琨 | Electronic expansion valve and refrigerating system |
-
2019
- 2019-09-09 CN CN201910845904.7A patent/CN110410573A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115962294A (en) * | 2022-12-28 | 2023-04-14 | 黄琨 | Electronic expansion valve and refrigerating system |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191105 |
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| WW01 | Invention patent application withdrawn after publication |