CN206530729U - A kind of valve rod leak-proof structure of ball valve under water - Google Patents
A kind of valve rod leak-proof structure of ball valve under water Download PDFInfo
- Publication number
- CN206530729U CN206530729U CN201720131861.2U CN201720131861U CN206530729U CN 206530729 U CN206530729 U CN 206530729U CN 201720131861 U CN201720131861 U CN 201720131861U CN 206530729 U CN206530729 U CN 206530729U
- Authority
- CN
- China
- Prior art keywords
- valve rod
- lip
- type packing
- spring energy
- seal
- 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.)
- Active
Links
Landscapes
- Details Of Valves (AREA)
Abstract
A kind of valve rod leak-proof structure of ball valve under water, including valve rod and valve rod installed part, valve rod coordinates with the mounting hole on valve rod installed part to be installed, three seal structures are provided between valve rod and mounting hole, wherein the second seal structures use spring energy storage sealing ring group, three seal structures are using two spring energy-storage sealing ring groups, second seal structures are engaged installation with three seal structures by a closure, closure one end compresses spring energy storage sealing ring group, the other end is provided with outward flange, in the upper surface of outward flange provided with two annular spaces for placing two spring energy-storage sealing ring groups, it is additionally provided with a gland for being used to be pressed on two groups of spring energy-storage sealing rings by closure in spring energy storage sealing ring group.It can effectively ensure that and from low pressure to high pressure and bear under external pressure operating mode the sealing reliability of ball-valve valve rod under water in medium；The leakage of medium is efficiently controlled, so as to ensure the job security of ball valve under water.
Description
Technical field
The utility model is related to underwater line valve technology field, more particularly, to a kind of valve stem seal knot of ball valve under water
Structure.
Background technology
For ball valve, the valve rod and bonnet of valve（Upper-mounting type ball valve）On mounting hole or and valve body（It is side-mounted
Ball valve）On mounting hole between and ball valve and the flange and pad of pipeline connection between produce the consequence that causes of leakage, often
It is even more serious than interior leakage between valve seat and spheroid.Therefore the leakage what state of valve, carries out production strictly in line with rules and regulations and keeps the safety in production
Important symbol, is also a yardstick for weighing a National Industrial production management level and technological progress degree.
The valve rod of ball valve is only rotated, and packing box seal is used between valve rod and mounting hole, simple in construction, processing
It is easily manufactured, it is cheap, therefore using most universal.Packing box seal is main by stuffing box, filler and Packing seat and filler pressure
Tight mechanism composition, filler is according to the graphite packing of applying working condition different choice or PTFE fillers.This seal form is widely used in
The fields such as petrochemical industry, ship, power station, metallurgy.But packing seal of the prior art has very for the applying working condition of ball valve
Big limitation, bear external pressure and the operating mode of high medium internal pressure under, common packing seal and single packing box seal
Form has been difficult to ensure that between valve rod and mounting hole sealed reliability.
How to realize that reliable under the operating mode of external pressure and higher medium internal pressure of the valve rod of ball valve and mounting hole being sealed to
Urgent problem to be solved.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides ball valve under a kind of preventing water leakage.
The technical scheme that in order to solve the above-mentioned technical problem the utility model is used is：A kind of valve rod of ball valve under water is close
Seal structure, including valve rod and the valve rod installed part for coordinating installation with valve rod, being provided with valve rod installed part is used to install valve rod
Mounting hole, is provided with three seal structures, the three seal structures are to be located at valve rod installed part between valve rod and mounting hole
The first seal structures towards valve pocket end and valve rod junction, it is located at the second seal structures close to valve rod installed part upper end
With the three seal structures for being located at valve rod installed part upper end and valve rod junction, wherein the second described seal structures include
It is located at the in the middle part of mounting hole first heavy platform and is filled in the first heavy spring energy storage sealing ring group between platform and valve rod, the 3rd road is close
Seal structure include being located at the top of the first heavy platform close to the second of mounting hole upper end sink platform and be arranged on the second heavy platform and valve rod it
Between closure and with closure coordinate install two spring energy-storage sealing ring groups, described closure one end puts in first
Heavy to be used to spring energy storage sealing ring group being pressed between mounting hole and valve rod between platform and valve rod, the other end of closure is provided with
Coordinate the outward flange installed with the table top of the second heavy platform, second sinks between platform and valve rod provided with one in the upper surface of outward flange
Space is divided into the shading ring of two annular spaces, and it is empty that two described spring energy-storage sealing ring groups are separately positioned on two annulars
In, spring energy-storage sealing ring group includes a top lip-type packing with U-shaped opening, and one coordinates with the U-shaped opening
The U-shaped section turn of installation, pushes up the opening down setting of lip-type packing, in U-shaped section turn and the platform of the second heavy platform
Upper support ring is provided between face, in Gask-O-Seal of the upper end of top lip-type packing provided with a rectangular cross-section；It is additionally provided with
One gland for being pressed on two groups of spring energy-storage sealing rings by closure in spring energy storage sealing ring group.
Further, described spring energy storage sealing ring group includes lower lip-type packing, middle lip-type packing and upper lip
Sealing ring, Open Side Down for described lower lip-type packing, section in "" shape, opening is provided with the opening of lower lip-type packing
V-arrangement section directed downwardly spring leaf, V-arrangement section spring leaf is supported on first by a lower supporting pad with annular protrusion and sunk
On the table top of platform；Described middle lip-type packing is V-arrangement, and number is multiple, and a nethermost middle lip-type packing passes through
One middle support ring that is roughly triangular and taking projection is supported in lower lip-type packing, lip-type packing point in others
It is not supported on by " people " font support ring in adjacent middle lip-type packing；Described upper lip-type packing is opening court
The Y shape of lower setting, it is supported in the middle lip-type packing of the top by " people " font support ring, in upper lip
The upper end of sealing ring is provided with a rectangular seal.
Further, described rectangular seal internal perisporium is provided with multiple annular seal grooves.
Further, the first described seal structures include the annular projection that is located on valve rod and be located at annular projection and
Valve rod installed part is towards the thrust washer between valve pocket end.
Further, the surface of the thrust washer scribbles one layer of PTFE.
Beneficial effect：
The utility model is to valve stem seal（Sealing abbreviation valve stem seal between valve rod and mounting hole）Using three seals
Structure, three seal structures are separately positioned on the two annular skies separated by shading ring using two spring energy-storage sealing ring groups
In, U-shaped section turn 702 provides pretension sealing force, promotes to push up the side wall that sealed groove is close in lip-type packing 703, makes
The relatively low medium of pressure can not be consequently formed effective in from vacuum to low pressure range by the contact sealing surface of the sealed groove
Sealing.Pressure can aid in the accumulation of energy of U-shaped section turn 702 in other medium, and pressure is bigger, push up the sealing of lip-type packing 703
It is more abundant that contact sealing surface of the lip with sealed groove is fitted, and is consequently formed high pressure sealing.
Further, since U-shaped section turn 702 forever provides elastic force to top lip-type packing 703（That is pretension sealing force）,
Therefore, it is possible to make up top lip-type packing 703 itself abrasion and and its relative position between mating parts bias, from
And ensure that the permanent reliability of three seal structures.
In a word, the utility model can effectively ensure that from low pressure to high pressure and bears under external pressure operating mode ball valve under water in medium
Sealing reliability；The leakage of medium is efficiently controlled, so as to ensure the job security of ball valve under water.
Further specific detailed description is done to the utility model with reference to the accompanying drawings and detailed description.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is enlarged drawing at I in Fig. 1.
Fig. 3 is amplification decomposition figure at II in Fig. 2.
Fig. 4 is enlarged drawing at III in Fig. 2.
In figure, 1, spheroid, 2, valve rod installed part, the 201, first heavy platform, the 202, second heavy platform, 3, valve rod, 4, gland, 5, the
One seal structures, 501, annular projection, 502, thrust washer, the 6, second seal structures, 601, lower supporting pad, 602, V-arrangement
Section spring leaf, 603, lower lip-type packing, 604, middle support ring, 605, middle lip-type packing, 606, " people " font support ring,
607th, upper lip-type packing, 608, rectangular seal, 7, three seal structures, 701, upper support ring, 702, U-shaped section bullet
Spring coil, 703, top lip-type packing, 704, Gask-O-Seal, 705, closure, 705a, shading ring, 8, sliding bearing.
Embodiment
As illustrated, a kind of valve rod leak-proof structure of ball valve under water, including valve rod 3 and the valve rod peace for coordinating installation with valve rod
Piece installing 2, the mounting hole for being used for installing valve rod is provided with valve rod installed part 2, three seals are provided between valve rod 3 and mounting hole
Structure.
The three seal structures be located at valve rod installed part 2 first towards valve pocket end and the junction of valve rod 3 it is close
Seal structure 5, be located at close to the upper end of valve rod installed part 2 the second seal structures 6 and be located at the upper end of valve rod installed part 2 and valve rod 3
The three seal structures 7 of junction.
The first described seal structures 5 include the annular projection 501 being located on valve rod and are located at annular projection 501 and valve
Rod installation part 2 scribbles one layer of PTFE on the surface of thrust washer 502 towards the thrust washer 502 between valve pocket end.
The second described seal structures 6 include being located at the first heavy platform 201 in the middle part of mounting hole and are filled in the first heavy platform
Spring energy storage sealing ring group between 201 and valve rod 3.
In the present embodiment, described spring energy storage sealing ring group includes lower lip-type packing 603, middle lip-type packing 605
With upper lip-type packing 607.
Open Side Down for described lower lip-type packing 603, section in "" shape, set in the opening of lower lip-type packing 603
There is downward opening V-arrangement section spring leaf 602, V-arrangement section spring leaf passes through a lower supporting pad 601 for carrying annular protrusion
On the table top for being supported on the first heavy platform 201.
Described middle lip-type packing 605 is V-arrangement, and number is multiple, and a nethermost middle lip-type packing 605 is led to
Cross one take it is raised and roughly triangular（The shape that i.e. section can be combined into for a rectangular base and gable top
Shape, sets raised in the drift angle of triangle）Middle support ring 604 be supported in lower lip-type packing 603, it is other in lip
Sealing ring 605 is supported in adjacent middle lip-type packing by " people " word support ring 606 respectively
In the present embodiment, middle lip-type packing 605 is 3.
Described upper lip-type packing 607 is the Y shape of opening down setting, and it is supported by " people " font support ring
In the middle lip-type packing positioned at the top, in the upper end of upper lip-type packing 607 provided with a rectangular seal 608.For
Sealing effectiveness is further enhanced, multiple annular seal grooves are provided with the internal perisporium of rectangular seal 608.
Three seal structures 7 include being located at second heavy platform 202 He of the top close to mounting hole upper end of the first heavy platform 201
It is arranged on the second heavy closure 705 between platform and valve rod 3 and two spring energy-storages sealing with the cooperation installation of closure 705
Circle group.
Described one end of closure 705 is put in the first heavy sealed letter formed between platform 201 and valve rod 3, for by bullet
Property accumulation of energy sealing ring group be pressed between mounting hole and valve rod 3, the other end of closure 705 is provided with the platform with the second heavy platform 202
Face coordinates the outward flange installed, and is divided into the second heavy space between platform 202 and valve rod 3 provided with one in the upper surface of outward flange
The shading ring 705a of two annular spaces.
Two described spring energy-storage sealing ring groups are separately positioned in two annular spaces, spring energy-storage sealing ring group bag
A top lip-type packing 703 with U-shaped opening is included, one coordinates the U-shaped section turn installed with the U-shaped opening
702, the opening down setting of lip-type packing 703 is pushed up, is set between the table top of the heavy platform 202 of U-shaped section turn 702 and second
There is upper support ring 701, in Gask-O-Seal 704 of the upper end of top lip-type packing 703 provided with a rectangular cross-section；In annular
The top of sealing gasket 704, which is additionally provided with one, to be used to two groups of spring energy-storage sealing rings being pressed on second sealing by closure 705
Gland 4 in the spring energy storage sealing ring group of structure.
Concrete operating principle of the present utility model is as follows：
Work as valve seat（Not shown in figure）Leaked between spheroid 1, medium is reached between spheroid 1 and valve rod installed part 2
Cavity, pressure medium increase, if medium breaks through the first seal structures 5, the impurity such as solid particle in medium is by mistake
Filter.Under internal pressure effect, the lip of each lip-type packing of spring energy storage sealing ring group in the second seal structures 6, which changes, to be connect
Enlarged contact stress while the state of touching, makes spring energy storage sealing ring group coordinate even closer with valve rod 3, makes medium be difficult to lead to
Cross the second seal structures 6.
Even if medium has passed through the lip of lower lip-type packing 603, internal pressure can also lose very big, then pass through middle lip packing
During the lip of circle 605, pressure can lose once again；When middle lip-type packing 605 is set to multiple, medium often passes through a middle lip
Shape sealing ring 605, internal pressure can all lose, so on, to during upper lip-type packing 607, internal pressure will substantially completely lose
Lose, then leakage path is prevented.
Reached if medium has passed through the second seal structures 6 at the spring energy-storage sealing ring group of three seal structures 7,
Due to pushing up the pressure compensation effect of lip-type packing 703（I.e.：In the presence of U-shaped section turn 702 and medium, lip is pushed up
Sealing ring 703 can be softened, and the sealing surface formation between valve rod 3 is brought into close contact guarantee sealing, and the pressure power of medium is bigger, top
Lip-type packing 703 and the adhesive force of valve rod are tighter）, can effectively prevent the leakage of medium.Due to there is U-shaped section turn
702 provide pretightning force, and top lip-type packing 703 can also effectively prevent outer low pressure power media from entering in pipe-line system.
In the utility model, spring energy-storage sealing ring group is used using three seal structures, especially three seals circle
Sealed：Two top lip-type packings 703 are separately mounted between shading ring 705a and valve rod installed part 2 and shading ring
In the sealed groove formed respectively between 705a and valve rod 3, U-shaped section turn 702 provides pretension sealing force, promotes to push up lip
Sealing ring 703 is close to the side wall of sealed groove, makes the relatively low medium of pressure can not be by the contact sealing surface of the sealed groove（I.e.
Opposite face between shading ring 705a and valve rod installed part 2 and between shading ring 905a and valve rod 5）, it is consequently formed from vacuum
Effective sealing in low pressure range, as shown in Figure 4.With the rise of pressure medium, seal up for safekeeping in annular seal space（Push up lip packing
Circle 703 and valve rod installed part 2, valve rod 3 and the sealing space formed between the table top of the second heavy platform）Interior pressure is also more next
It is higher（Because the medium of valve inner flowing has very high pressure, medium passes through outside between valve rod 3 and valve rod installed part 2
When portion is leaked, first have to, by the first seal structures 5, then finally just reach the 3rd road by the second seal structures 6 again
Pressure more and more higher is stated in sealing structure 7, this place, assumes that medium is sealed by the first seal structures 5 and second
Structure 6 reaches the annular seal space）, can providing the sealing force of abundance, to promote the contact sealing surface of the sealed groove to be formed reliable close
Envelope, is consequently formed high pressure sealing.
Because U-shaped section turn 702 forever provides elastic force to top lip-type packing 703（That is pretension sealing force）, therefore
Abrasion and and itself and the mating parts of top lip-type packing 703 itself can be made up（Valve rod installed part 2 and valve rod 3）Between phase
To the bias of position, so as to ensure sealedly permanent reliability.
The present embodiment uses the thrust washer 502 with PTFE coatings to be sealed as the first seal structures, valve rod
3rd, flat seal is formed between thrust washer 502 and valve rod installed part 2, when containing solid particle in medium, can filtered out miscellaneous
Matter, effectively protects sliding bearing 8 and valve rod 3, and avoid the lower two seals of solid particle intrusion.
Second seal structures of the present embodiment use the spring energy storage sealing ring group that low loss is leaked, as shown in figure 3, from
Each lip-type packing under state（Lower lip-type packing 603, middle lip-type packing 605 and upper lip-type packing 608）,
Its lip portion outside diameter is more than stuffing-box internal diameter（The aperture of the i.e. first heavy top valve rod mounting hole of platform 201）, the internal diameter of its lip is less than
The external diameter of valve rod 3, such structure causes each lip-type packing just to have certain deformation after mounting, in each support ring（Lower support
Pad 601 and middle support ring 604）In the presence of, formed between the procheilon portion of each lip-type packing and valve rod 3 and contact pressure accordingly
Power, so as to realize reliable sealing.
As described herein consistent up and down with accompanying drawing 1 itself up and down, valve rod installed part 2 as described herein is for upper dress
For formula ball valve, bonnet is referred to；Subdivision valve body is referred to for side-mounted ball valve.Upper-mounting type ball valve and side-mounted ball valve
For prior art, repeat no more herein.
Claims (5)
1. a kind of valve rod leak-proof structure of ball valve under water, including valve rod（3）Coordinate the valve rod installed part installed with valve rod（2）,
In valve rod installed part（2）It is provided with the mounting hole for being used for installing valve rod, it is characterised in that：In valve rod（3）Set between mounting hole
There are three seal structures, the three seal structures are to be located at valve rod installed part（2）Towards valve pocket end and valve rod（3）Junction
The first seal structures（5）, be located at close to valve rod installed part（2）Second seal structures of upper end（6）Pacify with valve rod is located at
Piece installing（2）Upper end and valve rod（3）The three seal structures of junction（7）, wherein the second described seal structures（6）Including
It is located at the in the middle part of mounting hole first heavy platform and is filled in the first heavy platform（201）With valve rod（3）Between spring energy storage sealing ring group,
Three seal structures（7）Second heavy platform of the top close to mounting hole upper end including being located at the first heavy platform（202）Be arranged on
Second heavy closure between platform and valve rod（705）And and closure（705）Coordinate the two spring energy-storage sealing rings installed
Group, described closure（705）One end puts in the first heavy platform and valve rod（3）Between be used for spring energy storage sealing ring group is pressed on
Mounting hole and valve rod（3）Between, closure（705）The other end be provided with and the second heavy platform（202）Table top coordinate install outer
Flange, isolating for two annular spaces is divided into the upper surface of outward flange provided with one by the second heavy space between platform and valve rod
Ring（705a）, two described spring energy-storage sealing ring groups are separately positioned in two annular spaces, spring energy-storage sealing ring group
Including one have U-shaped opening top lip-type packing（703）, one coordinates the U-shaped section spring installed with the U-shaped opening
Circle（702）, push up lip-type packing（703）Opening down setting, in U-shaped section turn（702）With the second heavy platform（202）'s
Upper support ring is provided between table top（701）, in top lip-type packing（703）Upper end it is annular close provided with rectangular cross-section
Packing（704）；Being additionally provided with one is used to two groups of spring energy-storage sealing rings passing through closure（705）It is pressed on spring energy storage sealing
Gland in circle group（4）.
2. a kind of valve rod leak-proof structure of ball valve under water according to claim 1, it is characterised in that：Described spring energy storage
Sealing ring group includes lower lip-type packing（603）, middle lip-type packing（605）With upper lip-type packing（607）, described lower lip
Shape sealing ring（603）Open Side Down, section in "" shape, in lower lip-type packing（603）Opening in be provided with downward opening V
Tee section spring leaf（602）, V-arrangement section spring leaf pass through one carry annular protrusion lower supporting pad（601）It is supported on first
Heavy platform（201）Table top on；Described middle lip-type packing（605）For V-arrangement, and number is multiple, a nethermost middle lip
Shape sealing ring passes through a middle support ring that is roughly triangular and taking projection（604）It is supported on lower lip-type packing（603）
On, lip-type packing in others（605）Pass through " people " font support ring respectively（606）It is supported on adjacent middle lip close
In seal；Described upper lip-type packing（607）For the Y shape of opening down setting, it passes through " people " font support ring branch
Support is in the middle lip-type packing positioned at the top, in upper lip-type packing（607）Upper end provided with rectangular seal
（608）.
3. a kind of valve rod leak-proof structure of ball valve under water according to claim 2, it is characterised in that：Described rectangular seal
Circle（608）Internal perisporium is provided with multiple annular seal grooves.
4. a kind of valve rod leak-proof structure of ball valve under water according to claim 1, it is characterised in that：Described first is close
Seal structure（5）Including the annular projection being located on valve rod（501）Be located at annular projection and valve rod installed part（2）Towards valve pocket end
Between thrust washer（502）.
5. a kind of valve rod leak-proof structure of ball valve under water according to claim 4, it is characterised in that：The thrust washer
（502）Surface scribble one layer of PTFE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720131861.2U CN206530729U (en) | 2017-02-14 | 2017-02-14 | A kind of valve rod leak-proof structure of ball valve under water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720131861.2U CN206530729U (en) | 2017-02-14 | 2017-02-14 | A kind of valve rod leak-proof structure of ball valve under water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206530729U true CN206530729U (en) | 2017-09-29 |
Family
ID=59916066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720131861.2U Active CN206530729U (en) | 2017-02-14 | 2017-02-14 | A kind of valve rod leak-proof structure of ball valve under water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206530729U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641320A (en) * | 2017-02-14 | 2017-05-10 | 中国船舶重工集团公司第七二五研究所 | Valve rod seal structure of underwater ball valve |
-
2017
- 2017-02-14 CN CN201720131861.2U patent/CN206530729U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641320A (en) * | 2017-02-14 | 2017-05-10 | 中国船舶重工集团公司第七二五研究所 | Valve rod seal structure of underwater ball valve |
| CN106641320B (en) * | 2017-02-14 | 2020-07-24 | 中国船舶重工集团公司第七二五研究所 | Valve rod sealing structure of underwater ball valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106641320A (en) | Valve rod seal structure of underwater ball valve | |
| CN107084258A (en) | To folder Fluorine-lined ball valve | |
| CN107061760A (en) | A kind of double seals butterfly valve | |
| CN206530729U (en) | A kind of valve rod leak-proof structure of ball valve under water | |
| CN203560507U (en) | Novel quadruple-combined sealing pipeline ball valve seat | |
| CN206530709U (en) | A kind of bidirectional integral ultralow temperature sealing ring | |
| CN206206582U (en) | Sealing device | |
| CN205715756U (en) | A kind of novel anti-gray valve seat construction of Coal Chemical Industry ball valve | |
| CN205261000U (en) | Dual stem seal structure of valve | |
| CN203286129U (en) | Valve seat seal long in service life and good in sealing effect | |
| CN207018618U (en) | A kind of airtight and watertight padding for valve rod | |
| CN205534741U (en) | Terminal seal structure of pipeline | |
| CN206159475U (en) | Sealing washer with automatic compensation function | |
| CN207750510U (en) | Gas-combustion valve and pipe-line system | |
| CN211231730U (en) | High-temperature high-pressure buffer type self-sealing check valve | |
| CN205605826U (en) | Composite seal who is suitable for double -phase medium of solid -liquid | |
| CN206495816U (en) | A kind of mechanical seal for pump suitable for the highly crystalline station of high solids | |
| CN204784947U (en) | Leakage -proof valve | |
| CN216200640U (en) | Biological airtight valve of high sealing performance | |
| CN102628524A (en) | Valve stem sealing device | |
| CN213420094U (en) | Novel self-sealing valve packing sealing device | |
| CN206449294U (en) | Water power gate valve cover packing seal component | |
| CN205207719U (en) | Run -in gate valve | |
| CN204175970U (en) | Stop valve | |
| CN212318804U (en) | Butt clamp type fluorine lining butterfly valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |