CN110005868A - A kind of underwater ball-valve valve rod combined sealing structure - Google Patents
A kind of underwater ball-valve valve rod combined sealing structure Download PDFInfo
- Publication number
- CN110005868A CN110005868A CN201910405071.2A CN201910405071A CN110005868A CN 110005868 A CN110005868 A CN 110005868A CN 201910405071 A CN201910405071 A CN 201910405071A CN 110005868 A CN110005868 A CN 110005868A
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- China
- Prior art keywords
- valve
- valve rod
- gland
- ring
- deck
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- 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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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
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
- F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing
- F16K41/043—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing for spindles which only rotate, i.e. non-rising spindles
- F16K41/046—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing for spindles which only rotate, i.e. non-rising spindles for rotating 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
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
- F16K41/06—Spindle sealings with stuffing-box ; Sealing rings with at least one ring attached to both spindle and housing
- F16K41/063—Spindle sealings with stuffing-box ; Sealing rings with at least one ring attached to both spindle and housing for spindles which only rotate, i.e. non-rising spindles
- F16K41/066—Spindle sealings with stuffing-box ; Sealing rings with at least one ring attached to both spindle and housing for spindles which only rotate, i.e. non-rising spindles for rotating valves
-
- 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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0694—Spindle sealings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
- Details Of Valves (AREA)
Abstract
The present invention relates to a kind of underwater ball-valve valve rod combined sealing structures, the valve rod that it includes valve deck, is assemblied in the axis hole of valve deck, combined seal ring, retaining ring and gland are disposed between valve deck and valve rod from bottom to up, combined seal ring is as first of primary seal between valve deck and valve rod；The top of gland is fixed by screws on valve deck；The gland bottom end close to valve deck side and be respectively set fluted with the side close to valve rod, spring energy-storage sealing ring is equipped in groove, is sealed as second；The outside and inside of the gland are additionally provided with multiple grooves, O-ring seal are equipped in groove, as three seals.A kind of underwater ball-valve valve rod combined sealing structure of the invention, using multiple valve stem seal, it can bear the high pressure from valve chamber medium, also the external pressure from deep water can be born, sealed reliable, high pressure, the problem of dielectric corrosion, external seawater pressure in the valve stem seal valve of the underwater valve of effective solution marine environment.
Description
Technical field
The present invention relates to underwater valve fields, more particularly to a kind of underwater ball-valve valve rod combined sealing structure.
Background technique
Underwater valve is referred mainly to using all valves of pipeline under water, is mainly used in opening for offshore oil and natural gas
It adopts.Underwater valve types mainly have ball valve, gate valve, check-valves etc..Compared with land valve, underwater environment is more complicated, valve
It needs for a long time in the environment of external high pressure, cold and hot temperature alternating, silt corrosion and microbial attack, and needs to receive underwater
Robot (ROV) or hydraulic device driving, this is just more harsh to the sealing requirements of valve itself, dynamic more particularly, to valve rod
External leakage at sealing should bear the internal pressure of valve, consider the pressure for bearing external seawater again, while considering medium to valve
The corrosion of the material of main parts such as lid.
For existing routine ball valve rod seal based on O-ring seal and graphite packing, sealing structure is simple, is widely applied
In petrochemical industry.How the valve stem seal valve of marine environment underwater valve in high pressure, dielectric corrosion, external sea hydraulic pressure are realized
Power becomes a kind of new challenge.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of underwater ball-valve valve rod combined sealing structure, use is multiple
Valve stem seal can bear the high pressure from valve chamber medium, can also bear the external pressure from deep water, and sealed reliable is effective to solve
Certainly high pressure, the problem of dielectric corrosion, external seawater pressure in the valve stem seal valve of the underwater valve of marine environment.
The technical solution adopted by the present invention to solve the technical problems is: a kind of underwater ball-valve valve rod combined sealing structure,
The valve rod that it includes valve deck, is assemblied in the axis hole of valve deck, is disposed with combination sealing from bottom to up between valve deck and valve rod
Circle, retaining ring and gland, combined seal ring is as first of primary seal between valve deck and valve rod；The top of gland is solid by screw
It is scheduled on valve deck；The gland bottom end close to valve deck side and with close to valve rod side be respectively set it is fluted, in groove
It is equipped with spring energy-storage sealing ring, is sealed as second；The outside and inside of the gland are additionally provided with multiple grooves, groove
It is inside equipped with O-ring seal, as three seals.
The contact medium surface overlaying of the valve deck has corrosion-resistant alloy layer.
Bearing is provided between the inside and valve rod on the top of the gland, bearing installation by adhering is used in gland
Valve rod is positioned and is oriented to.
The combined seal ring from bottom to up successively by T-type metal supporting rings, V-type spring, main concave-convex lip-type packing, in
Between concave-convex lip-type packing, adaptation sealing ring, concave retaining ring be assembled.
The section of the retaining ring is L-type, and card sets and on the step surface that is pressed on the inside of valve deck, the top gland of retaining ring
Bottom end；The bottom end of retaining ring is used for the positioning of combined seal ring.
Spring in the spring energy-storage sealing ring provides initial preload, and reliable sealing is realized under internal pressure effect, together
When block two flux leakage paths that leak of valve rod and gland and gland and valve deck.
The grooved inner surface heap is welded with corrosion-resistant alloy layer.
Beneficial effects of the present invention: a kind of underwater ball-valve valve rod combined sealing structure of the invention, it is close using multiple valve rod
Envelope, can bear the high pressure from valve chamber medium, can also bear the external pressure from deep water, sealed reliable, effective solution ocean
High pressure, the problem of dielectric corrosion, external seawater pressure in the valve stem seal valve of ambient water lower valve.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of underwater ball-valve valve rod combined sealing structure of embodiment；
Fig. 2 is a kind of schematic diagram of the combined seal ring of underwater ball-valve valve rod combined sealing structure of embodiment.
Specific embodiment
In order to deepen the understanding of the present invention, the present invention is done below in conjunction with drawings and examples and is further retouched in detail
It states, the embodiment is only for explaining the present invention, does not constitute and limits to protection scope of the present invention.
Embodiment
As depicted in figs. 1 and 2, a kind of underwater ball-valve valve rod combined sealing structure is present embodiments provided, it includes valve deck
1, the valve rod 3 being assemblied in the axis hole of valve deck 1 is disposed with combined seal ring 4, gear from bottom to up between valve deck 1 and valve rod 3
Circle 5 and gland 2, combined seal ring 4 is as first of primary seal between valve deck 1 and valve rod 3；The top of gland 2 passes through screw 7
It is fixed on valve deck 1, gland bears the internal pressure of valve chamber by screw thread；2 bottom end of gland close to valve deck 1 side and with it is close
The side of valve rod 3 is respectively set fluted, and spring energy-storage sealing ring 6 is equipped in groove, seals as second；The gland
2 outside and inside are additionally provided with multiple grooves, O-ring seal 8 are equipped in groove, as three seals；The valve deck 1
Contact medium surface overlaying have a corrosion-resistant alloy layer, the thickness of corrosion-resistant alloy layer is not less than 3mm；The top of the gland 2 it is interior
Bearing 9 is provided between side and valve rod 3,9 installation by adhering of bearing is in gland 2, for being positioned and being oriented to valve rod；Institute
State combined seal ring 4 from bottom to up successively by T-type metal supporting rings 401, V-type spring 402, main concave-convex lip-type packing 403, in
Between concave-convex lip-type packing 404, adaptation sealing ring 405, concave retaining ring 406 be assembled；The section of the retaining ring 5 is L-type,
Card sets and on the step surface that is pressed on the inside of valve deck, the bottom end of the top gland 2 of retaining ring 5；The bottom end of retaining ring 5 is used for combination sealing
The positioning of circle 4；Spring in the spring energy-storage sealing ring 6 provides initial preload, and reliable sealing is realized under internal pressure effect,
Valve rod and gland and gland and two flux leakage paths that leak of valve deck are blocked simultaneously；The grooved inner surface heap is welded with corrosion-resistant alloy layer.
In a kind of underwater ball-valve valve rod combined sealing structure of the present embodiment, the T-type metal supporting rings in combined seal ring
For stainless steel material, V-type spring is corrosion resistant alloy inconel, and main lip-type packing is corrosion resistant enhanced polytetrafluoroethyl-ne
Alkene material, middle concave convex lip shape sealing ring, adaptation sealing ring material are enhanced polytetrafluoroethylene, and concave retaining ring is polyethers ether
Ketone；When valve chamber pressure enters at valve rod and valve bonnet seal, main lip-shaped sealed ring realizes the first of low pressure under the effect of V-type spring
Begin to seal, main lip-shaped sealed ring struts and be adjacent to sealing surface under internal pressure effect, realizes sealing；Even if there is medium to pass through master
Lip-shaped sealed ring, internal pressure lost it is very big, then when passing through middle concave convex lip shape sealing ring, pressure further loss, directly
Ended completely to leakage.
In a kind of underwater ball-valve valve rod combined sealing structure of the present embodiment, spring energy-storage sealing ring is by T-type support ring, V
Type spring and collet composition, collet are enhanced polytetrafluoroethylene material, collet sealing surface two pass male and fomale(M&F) composition, spring offer
It is initial to pre-tighten, reliable sealing is realized under internal pressure effect.
In a kind of underwater ball-valve valve rod combined sealing structure of the present embodiment, O-ring seal material is the hydrogenation of sea water resistance
Butyronitrile, O-ring seal block the pressure for coming inside and outside 2 directions by certain amount of tension and compression energy simultaneously.
A kind of underwater ball-valve valve rod combined sealing structure of the present embodiment, gland and valve deck precision assembly, pass through screw pressure
Tightly；Gland and valve rod keep fit-up gap appropriate, pull when preventing valve rod from switching.
A kind of underwater ball-valve valve rod combined sealing structure of the present embodiment can bear to come from using multiple valve stem seal
The high pressure of valve chamber medium can also bear the external pressure from deep water, sealed reliable, the valve of the underwater valve of effective solution marine environment
High pressure, the problem of dielectric corrosion, external seawater pressure in bar sealing valve.
Above-described embodiment should not in any way limit the present invention, all to be obtained by the way of equivalent replacement or equivalency transform
Technical solution fall within the scope of protection of the present invention.
Claims (7)
1. a kind of underwater ball-valve valve rod combined sealing structure, it is characterised in that: including valve deck, the valve being assemblied in the axis hole of valve deck
Bar, is disposed with combined seal ring, retaining ring and gland from bottom to up between valve deck and valve rod, combined seal ring as valve deck with
First of primary seal between valve rod；The top of gland is fixed by screws on valve deck；The gland bottom end is close to valve deck
It side and is respectively set fluted with the side close to valve rod, spring energy-storage sealing ring is equipped in groove, it is close as second
Envelope；The outside and inside of the gland are additionally provided with multiple grooves, O-ring seal are equipped in groove, as three seals.
2. a kind of underwater ball-valve valve rod combined sealing structure according to claim 1, it is characterised in that: the valve deck connects
Touching dielectric surface heap is welded with corrosion-resistant alloy layer.
3. a kind of underwater ball-valve valve rod combined sealing structure according to claim 1, it is characterised in that: the top of the gland
Bearing is provided between the inside and valve rod at end, bearing installation by adhering is in gland, for being positioned and being oriented to valve rod.
4. a kind of underwater ball-valve valve rod combined sealing structure according to claim 1, it is characterised in that: the combination sealing
Circle is from bottom to up successively by T-type metal supporting rings, V-type spring, main concave-convex lip-type packing, middle concave convex lip shape sealing ring, suitable
It is assembled with sealing ring, concave retaining ring.
5. a kind of underwater ball-valve valve rod combined sealing structure according to claim 1, it is characterised in that: the retaining ring is cut
Face is L-type, and card sets and on the step surface that is pressed on the inside of valve deck, the bottom end of the top gland of retaining ring；The bottom end of retaining ring is used for
The positioning of combined seal ring.
6. a kind of underwater ball-valve valve rod combined sealing structure according to claim 1, it is characterised in that: the spring energy-storage
Spring in sealing ring provides initial preload, and reliable sealing is realized under internal pressure effect, while blocking valve rod and gland and pressure
Lid and two flux leakage paths that leak of valve deck.
7. a kind of underwater ball-valve valve rod combined sealing structure according to claim 1, it is characterised in that: table in the groove
Surface build-up welding has corrosion-resistant alloy layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910405071.2A CN110005868A (en) | 2019-05-15 | 2019-05-15 | A kind of underwater ball-valve valve rod combined sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910405071.2A CN110005868A (en) | 2019-05-15 | 2019-05-15 | A kind of underwater ball-valve valve rod combined sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110005868A true CN110005868A (en) | 2019-07-12 |
Family
ID=67177060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910405071.2A Pending CN110005868A (en) | 2019-05-15 | 2019-05-15 | A kind of underwater ball-valve valve rod combined sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110005868A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187921A (en) * | 2021-05-04 | 2021-07-30 | 滨州永泰不锈钢制品有限公司 | Submarine ball valve with long service life and preparation method thereof |
| CN114233925A (en) * | 2021-12-29 | 2022-03-25 | 苏州道森钻采设备股份有限公司 | Ultrahigh pressure sealing mechanism for valve rod of valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB817426A (en) * | 1956-05-22 | 1959-07-29 | Alexander Samuel Volpin | Stem and stuffing box construction for non-rising stem gate valves |
| US20050258386A1 (en) * | 2004-05-19 | 2005-11-24 | Zhejiang Sanhua Co., Ltd. | Ball valve |
| CN202659948U (en) * | 2012-04-20 | 2013-01-09 | 浙江欧维克阀门有限公司 | High-temperature metal hard sealing ball valve for granular medium |
| CN205663981U (en) * | 2016-06-02 | 2016-10-26 | 天津大学 | Upper assembling type ball valve stem seal structure |
| CN206017995U (en) * | 2016-08-25 | 2017-03-15 | 吴忠仪表有限责任公司 | The two-way multi-sealing structure of deep-sea ball-valve valve rod |
| 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 |
| CN209839311U (en) * | 2019-05-15 | 2019-12-24 | 苏州道森阀门有限公司 | Combined sealing structure of valve rod of underwater ball valve |
-
2019
- 2019-05-15 CN CN201910405071.2A patent/CN110005868A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB817426A (en) * | 1956-05-22 | 1959-07-29 | Alexander Samuel Volpin | Stem and stuffing box construction for non-rising stem gate valves |
| US20050258386A1 (en) * | 2004-05-19 | 2005-11-24 | Zhejiang Sanhua Co., Ltd. | Ball valve |
| CN202659948U (en) * | 2012-04-20 | 2013-01-09 | 浙江欧维克阀门有限公司 | High-temperature metal hard sealing ball valve for granular medium |
| CN205663981U (en) * | 2016-06-02 | 2016-10-26 | 天津大学 | Upper assembling type ball valve stem seal structure |
| CN206017995U (en) * | 2016-08-25 | 2017-03-15 | 吴忠仪表有限责任公司 | The two-way multi-sealing structure of deep-sea ball-valve valve rod |
| 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 |
| CN209839311U (en) * | 2019-05-15 | 2019-12-24 | 苏州道森阀门有限公司 | Combined sealing structure of valve rod of underwater ball valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187921A (en) * | 2021-05-04 | 2021-07-30 | 滨州永泰不锈钢制品有限公司 | Submarine ball valve with long service life and preparation method thereof |
| CN114233925A (en) * | 2021-12-29 | 2022-03-25 | 苏州道森钻采设备股份有限公司 | Ultrahigh pressure sealing mechanism for valve rod of valve |
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