CN209229126U - Low loss valve-rod combination filler resistant to high temperature - Google Patents
Low loss valve-rod combination filler resistant to high temperature Download PDFInfo
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- CN209229126U CN209229126U CN201821805448.0U CN201821805448U CN209229126U CN 209229126 U CN209229126 U CN 209229126U CN 201821805448 U CN201821805448 U CN 201821805448U CN 209229126 U CN209229126 U CN 209229126U
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Abstract
The utility model discloses a kind of low loss valve-rod combination fillers resistant to high temperature, including several axial overlaps, the sealing ring being socketed between stuffing-box and valve rod, the sealing ring includes the outer end ring of a pair positioned at axial ends, and time outer end ring is equipped on the inside of outer end ring, is equipped with intermediate ring between secondary outer end ring；The outer end ring is the circular ring shape of equal thickness；The end face of the axial outboard end of described outer end ring is perpendicular to axial plane, axial inner end is zig zag plane, the outside and inside of zig zag plane are perpendicular to axial planar annular, it is connected between two planar annulars with annular slope, the radial outside of annular slope is tilted to spool direction, and radially inner side is tilted to valve rod operation extreme direction；The both ends of the intermediate ring are zig zag plane, and zig zag plane is identical as the axial inner end end face of time outer end ring.The beneficial effects of the utility model are: the elastic deformation of each sealant can be given full play to, realize to efficient sealed in stuffing-box.
Description
Technical field
The utility model relates to sealing material and sealing structure field, specifically a kind of low loss valve-rod combination resistant to high temperature
Filler.
Background technique
Valve is important industrial equipment, and leakproofness is one of important indicator of valve performance.It is wanted in the control of fluid precision
It asks down, in addition to visible leakage will be prevented, valve is also required to have the effect of low fugacity leakage.Strictly speaking, it escapes
It dissipates property leakage and refers to the sightless leakage for needing just to learn by instrument detection, be typically found in filler region and pad area
Domain.Spacer region is generally static seal, and fugacity leakage is easy to control.It is dynamic sealing at filler, the motion feature of valve rod causes
It is easier that fugacity is caused to leak herein, especially under the operating condition of superhigh temperature, sealing material, which is oxidized easily, causes sealing to be lost
Effect, therefore sealing reliability is lower.Chinese patent literature CN204187006U discloses " low loss filler on March 4th, 2015
Sealing structure ", including close valve deck packing cavity upper port gland, packing cavity be from top to bottom disposed with liner,
The inner wall of lower liner, spring and heelpiece, the gland is provided with sealed groove, is equipped with O-ring seal in the sealed groove；
Composite filling is provided between the upper and lower liner, this patent can prevent filler relaxation from valve seal performance being caused to reduce, cut
Filler partially radially expands and sealed valve stem, and valve rod can preferably keep dynamic sealing during the motion, avoid fugacity
Leakage.The sealing principle of valve stem packing is axially to apply pretightning force, is deformed radial direction, fills valve rod and valve packing is contained
Interface.To block medium to flow out, to achieve the purpose that sealed valve stem.Exist for the prior art for including aforementioned patent
Interior, the structure of use is generally that composition is laminated in Multi-layer graphite ring in the axial direction.It is pre- when axially applying since graphite annulus has elasticity
When clamp force, the graphite annulus elder generation stress deformation at the both ends of filler, the power for being transferred to middle part graphite annulus is consumed, therefore middle part
Point the stress of graphite annulus be less than the graphite annulus at both ends, the degree of deformation again smaller than both ends so that the graphite annulus of middle section without
Method such as perfect condition and valve rod lateral wall and stuffing-box inner sidewall completely attach to, and when serious, are only able to maintain upper and lower ends
Two graphite annulus can play sealing function.Since effective contact surface is substantially reduced than perfect condition, sealing is extremely difficult to
Design effect.
Summary of the invention
Based on problem above, the utility model provides a kind of low loss valve-rod combination filler resistant to high temperature, can sufficiently send out
The elastic deformation of each sealant is waved, is realized to efficient sealed in stuffing-box.
In order to realize goal of the invention, the utility model adopts the following technical solution: a kind of low loss valve rod group resistant to high temperature
Filler is closed, including several axial overlaps, the sealing ring being socketed between stuffing-box and valve rod, the sealing ring, which includes, is located at axial two
The outer end ring of a pair at end, outer end ring inside are equipped with time outer end ring, are equipped with intermediate ring between secondary outer end ring；The outer end ring is uniform thickness
The circular ring shape of degree；The end face of the axial outboard end of described outer end ring is perpendicular to axial plane, and axial inner end is
Zig zag plane, the outside and inside of zig zag plane are the planar annular perpendicular to axial direction, are connected between two planar annulars with annular slope
It connects, the radial outside of annular slope is tilted to spool direction, and radially inner side is tilted to valve rod operation extreme direction；The intermediate ring
Both ends are zig zag plane, and zig zag plane is identical as the axial inner end end face of time outer end ring.
The low loss valve-rod combination filler resistant to high temperature of this programme design, sealing ring is divided into three kinds of structures: the first is
Outer end ring is traditional pancake, and cross sectional shape is rectangle, this kind of sealing ring is arranged on axial both ends, is mainly used as scraping
Except the dirt of stem surface；Second is time outer end ring, is arranged on the position on the inside of outer end ring, the face against outer end is
Perpendicular to axial plane, it can be close to the inner side end of outer end ring, be close together between the two by stiction, it is interior
End face is zig zag plane, and zig zag plane is made of the annular slope of the planar annular in outside, the planar annular of inside and both connections, and
The radial outside end of annular slope is tilted to spool direction, and radially inner side makes time outer end ring to valve rod operation extreme direction inclination
The space of one rotary table of protrusion either one rotary table of recess in the middle part of inner end；The third is intermediate ring, is clamped in outer end twice
Between ring, quantity can be 1, be also possible to appropriate number of multiple, and the both ends of the surface of intermediate ring are zig zag plane, shape and time
The inner end end face of outer end face is consistent, one end protrusion rotary table, the space of another one rotary table of concave end.When installation, adjacent is close
Installation is close to the end face of adaptation between seal ring.Outer end ring, which is mainly used to realize, scrapes dirt and end part seal；Secondary outer end ring with it is outer
After the one side that end ring is close to is close to outer end ring inner side end static friction, time outer end ring can be driven in outer end ring radial expansion
Synchronous radial expansion；Meanwhile the zig zag plane of the inner end design of secondary outer end ring can also transmit the radial expansion power of secondary outer end ring
To intermediate ring, intermediate ring is driven also to synchronize radial expansion；Also all design has the song being close to adjacent seals ring at the both ends of intermediate ring
Folding face produces self-locking seal performance, so that all intermediate rings is all had the effect of radial synchronization telescope, in temperature and pressure
Effective compensation can be carried out under alternation operating condition, therefore in axially loaded, all sealing rings can synchronization telescope, effectively fill out
Reliable sealing is realized in space between filling material culvert and valve rod.
Preferably, the outer end ring is high density vermiculite base sealing ring.High density vermiculite base sealing ring density is larger, diameter
It deforms smaller after to stress, enough power can be transferred to time outer end ring of axially inner side, to drive time outer end ring synchronization
Deformation.
Preferably, the severe nickel wire net cover of outer end ring housing mattress.Outer end ring uses vermiculite base band material housing high temperature resistant mattress
High density end ring is made in severe nickel wire net cover, and while ensuring resistance to 800 DEG C of high temperature, the severe nickel wire net cover of housing high temperature resistant mattress is effectively anti-
Only medium washes away vermiculite based material.
Preferably, described outer end ring is middle density vermiculite base sealing ring.Middle density vermiculite base sealing ring density is placed in the middle,
It can produce certain deformation after radial force, synchronous with the generation of outer end ring after by axially external stress can either deform, again
Certain power can be transferred to the intermediate ring of axially inner side, to drive the synchronous deformation of intermediate ring.
Preferably, the intermediate ring is low-density vermiculite base sealing ring.Low-density vermiculite base sealing ring density is minimum, diameter
Can produce moderate finite deformation after to stress, can after by axially external stress with outer end ring, secondary outer end ring generation is synchronous becomes
Shape.
In conclusion the beneficial effects of the utility model are: the elastic deformation of each sealant can be given full play to, in fact
Now to efficient sealed in stuffing-box.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram of one of them outer end ring.
Fig. 3 is the structural schematic diagram of intermediate ring.
Wherein: A stuffing-box, B valve rod, 1 outer end ring, 2 outer end ring, 3 intermediate rings, 4 planar annulars, 5 annular slopes.
Specific embodiment
The utility model is further described with specific embodiment with reference to the accompanying drawing.
Embodiment as shown in Figure 1, for a kind of low loss valve-rod combination filler resistant to high temperature.The low ease resistant to high temperature of this example
Valve-rod combination filler is dissipated, including 6 axial overlaps, the sealing ring being socketed between stuffing-box A and valve rod B.In these sealing rings
Outer diameter is equal, stacks in such a way that end face is close to mutually in axial direction each other.These sealing rings include 3 kinds, every kind of shape
It all has any different with material, location is also different.
Referring to Fig. 1, what it is positioned at upper and lower ends is two outer end ring 1.Outer end ring is the circular ring shape of equal thickness, and material is highly dense
Vermiculite base sealing ring is spent, the severe nickel wire net cover of housing mattress realizes sealing and scrapes the double action of dirt.
On the inside of each outer end ring is one outer end ring 2.As shown in Fig. 2, the axial outboard end of secondary outer end ring
End face is perpendicular to axial plane, and axial inner end is zig zag plane, and the outside and inside of zig zag plane are perpendicular to axial direction
Planar annular 4, with the connection of annular slope 5 between two planar annulars, the radial outside of annular slope is tilted to spool direction, diameter
Inwardly lateral valve rod operation extreme direction inclination.Time outer end ring being located above, upper surface is plane, and lower end surface is zig zag plane, bent
Folding face constitutes the upper concave space of a truncated cone-shaped.Underlying outer end ring, lower end surface is plane, and upper surface is zig zag plane,
Zig zag plane constitutes a convex rotary table.Secondary outer end ring is middle density vermiculite base sealing ring.
Between two outer end ring is two intermediate rings 3.As shown in figure 3, the both ends of intermediate ring are zig zag plane, it is bent
Folding face is identical as the axial inner end end face of time outer end ring, and upper surface constitutes a convex rotary table, and lower end surface constitutes one
The upper concave space of truncated cone-shaped.Intermediate ring is low-density vermiculite base sealing ring.
The low loss valve-rod combination filler resistant to high temperature of this example, using different combinations of materials, different Graded Densities
Combination, different combination of shapes, are formed with boss with boss space self-locking, to effectively be synchronized radial expansion, are realized
Reliable sealing effect.
It is surveyed through inventor, the technical target of the product of the low loss valve-rod combination filler resistant to high temperature of this example is as follows:
| Project | Unit | Index value |
| Compression ratio | ﹪ | 10~25 |
| Rebound degree | ﹪ | ≥35 |
| Thermal weight loss (800 DEG C/h) | ﹪ | ≤5 |
| Sealing leak rate (400 DEG C) VDI2440 (2000) perTA-LUFT | Mbar-l/sec (even sealed perimeter/rice) | ≤1.0×10-2 |
Claims (5)
1. a kind of low loss valve-rod combination filler resistant to high temperature, including several axial overlaps, it is socketed in stuffing-box (A) and valve rod
(B) sealing ring between, characterized in that the sealing ring includes the outer end ring (1) of a pair positioned at axial ends, sets on the inside of outer end ring
There is time outer end ring (2), is equipped with intermediate ring (3) between secondary outer end ring；The outer end ring is the circular ring shape of equal thickness；The secondary outer end
The end face of the axial outboard end of ring is perpendicular to axial plane, and axial inner end is zig zag plane, the outside of zig zag plane and
Inside is the planar annular (4) perpendicular to axial direction, is connected between two planar annulars with annular slope (5), the diameter of annular slope
Spool direction tilts laterally outwardly, and radially inner side is tilted to valve rod operation extreme direction；The both ends of the intermediate ring are zig zag plane,
Zig zag plane is identical as the axial inner end end face of time outer end ring.
2. one kind low loss valve-rod combination filler resistant to high temperature according to claim 1, characterized in that the outer end ring is
High density vermiculite base sealing ring.
3. one kind low loss valve-rod combination filler resistant to high temperature according to claim 2, characterized in that outside the outer end ring
Cover the severe nickel wire net cover of mattress.
4. one kind low loss valve-rod combination filler resistant to high temperature according to claim 1 or 2 or 3, characterized in that described time
Outer end ring is middle density vermiculite base sealing ring.
5. one kind low loss valve-rod combination filler resistant to high temperature according to claim 1 or 2 or 3, characterized in that in described
Between ring be low-density vermiculite base sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821805448.0U CN209229126U (en) | 2018-11-02 | 2018-11-02 | Low loss valve-rod combination filler resistant to high temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821805448.0U CN209229126U (en) | 2018-11-02 | 2018-11-02 | Low loss valve-rod combination filler resistant to high temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209229126U true CN209229126U (en) | 2019-08-09 |
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ID=67501754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821805448.0U Active CN209229126U (en) | 2018-11-02 | 2018-11-02 | Low loss valve-rod combination filler resistant to high temperature |
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| Country | Link |
|---|---|
| CN (1) | CN209229126U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911647A (en) * | 2020-06-16 | 2020-11-10 | 大高石化科技股份有限公司 | Low-torque low-loss valve |
| CN112094681A (en) * | 2020-08-20 | 2020-12-18 | 安徽绿环泵业有限公司 | Preparation method of lubricating sealing filler for corrosion-resistant pump |
-
2018
- 2018-11-02 CN CN201821805448.0U patent/CN209229126U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911647A (en) * | 2020-06-16 | 2020-11-10 | 大高石化科技股份有限公司 | Low-torque low-loss valve |
| CN112094681A (en) * | 2020-08-20 | 2020-12-18 | 安徽绿环泵业有限公司 | Preparation method of lubricating sealing filler for corrosion-resistant pump |
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