CN104832703B - A kind of Deep-sea high voltage valve rod Bidirectional seal structure and sealing anti-attrition method of testing - Google Patents
A kind of Deep-sea high voltage valve rod Bidirectional seal structure and sealing anti-attrition method of testing Download PDFInfo
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- CN104832703B CN104832703B CN201510222208.2A CN201510222208A CN104832703B CN 104832703 B CN104832703 B CN 104832703B CN 201510222208 A CN201510222208 A CN 201510222208A CN 104832703 B CN104832703 B CN 104832703B
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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
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Abstract
The present invention relates to a kind of Deep-sea high voltage valve rod Bidirectional seal structure and sealing anti-attrition method of testing, including the actuator under water for being arranged on valve one end, each sealing structure all includes valve body, bonnet, valve rod and valve stem seal part；Bonnet, respectively with valve body, actuator under water be connected, valve stem seal part is provided between bonnet, and valve rod；Bonnet, side is provided with detection screwed hole.Present invention employs the Multiple Combination sealing member in two relative directions of valve rod is respectively acting in the balance pressure in the actuator under water at valve rod sealing device two ends and the pressure medium in valve, sealing force increases with pressure rise, realizes that valve rod bidirection press is sealed.And grease is injected to stem internal by the thread measurement hole being arranged on bonnet, improve the service life of sealing member and the motility of valve rod action.The present invention extensively can be applied in the control valve field of deep-sea.
Description
Technical field
The present invention relates to a kind of valve rod leak-proof structure and tightness testing method, especially with regard to one kind in deep-sea control valve neck
The Deep-sea high voltage valve rod Bidirectional seal structure applied in domain and sealing anti-attrition method of testing.
Background technology
As petroleum exploration in China develops the strategic shift to ocean, the demand of offshore oil equipment is further increased,
It is bigger to external technology and equipment dependency, so either in terms of national energy security or from equipment manufacture future
From the aspect of development, the drilling and extracting equipment for developing suitable China's oil-gas exploration and exploitation is all extremely urgent.
Valving and equipment are monopolized by offshore company for a long time under water, and the country lacks input in this respect and research, in recent years
Come, the Some Enterprises of China expand research with regard to offshore oil underwater kit specific technique and product, achieve very big
It is progressive；But domestic rare enterprise or mechanism are studied to valving development system under water, comprehensively.Due to the valve that land uses
Door need not typically consider that sealing of the ambient exterior atmospheric pressure on valve rod affects, and be easy to observe and find seal defect from outside, easily
In maintenance, therefore need to only consider the impact of the pressure medium to valve stem seal of valve internal, i.e., the sealed reliable of single pressure direction
Property and maintainability, land valve both domestic and external without particular/special requirement, valve rod be using this kind of single direction pressure seal fill
Put.But, the valve used under abyssal environment, impact of the pressure medium to valve stem seal except valve internal is considered
Outward, the sealing device one end for considering valve rod is also needed to be affected by the sealing of the pressure of actuator internal balance under water, the balance
Pressure realizes actuator internal pressure with outside abyssal environment water depth pressure by a kind of deep sea pressure compensating chain device
Change and change, realize the dynamic equilibrium and the pressure protection to actuator under water of external and internal pressure.Valve stem seal dress now
Putting will be affected by the collective effect of pressure medium and water depth pressure.By grinding to external deep sea valve valve rod leak-proof structure
Study carefully, external deep sea valve valve stem seal is mostly using the combined multi-sealing structure form of dynamic radial seal and static seal and close
Seal apparatus, and to bear the pressure medium of valve internal also as single sealing direction.
The content of the invention
For the problems referred to above, it is an object of the invention to provide a kind of Deep-sea high voltage valve rod Bidirectional seal structure, this is close
Seal structure can be realized to high undersea hydrostatic pressures valve rod two way seal.
It is a further object of the present invention to provide a kind of sealing anti-attrition test of Deep-sea high voltage valve rod Bidirectional seal structure
Method, the method for testing adapt to the valve rod of deep-sea oil gas quarrying apparatus mesopelagic (200 meter Dao1000 meter Shui Shen) high pressure valve using the characteristics of pressure balance
Dynamic, static sealing and test, reduce valve rod frictional resistance, it is ensured that the reliability of valve stem seal, realize that long period is non-maintaining, make
With the performance requirement of life-span length.
For achieving the above object, the present invention takes technical scheme below：A kind of Deep-sea high voltage valve rod two way seal knot
Structure, it is characterised in that：It includes the actuator under water for being arranged on valve one end, each sealing structure all include valve body, on
Valve gap, valve rod and valve stem seal part；The bonnet, is connected respectively with the valve body, the actuator under water, it is described on
The valve stem seal part is provided between valve gap and the valve rod；The bonnet, side is provided with detection screwed hole.
Stuffing hole is offered on the bonnet, of actuator one end under water described in connection, described filler passes through at the top of hole
Fastening stud fixes gland, in the described filler hole of described filler gland bottom is provided with two-layer filler heelpiece,
Lantern sleeve is provided between two-layer described filler heelpiece；First annular chamber is formed between the lantern sleeve and the bonnet,
The second annular compartment is formed between the lantern sleeve and the valve rod；Pod apertures are provided with the middle part of the lantern sleeve, it is described to lead
Discharge orifice is connected with the first annular chamber, the second annular compartment；It is described detection screwed hole successively with the first annular chamber,
Pod apertures are connected with the second annular compartment.
Positioned at the valve body and the bonnet, connecting side, between the valve body and the bonnet, body cavity is formed
Room；Positioned at the bonnet, and the actuator connecting side under water, the bonnet, and the shape between actuator under water
Into bonnet, inner cavity chamber.
The hermetic unit include first seal, second seal, V-type filler combination sealing member, the 3rd sealing member and
4th sealing member；The bonnet, and the valve body connecting side, are provided between the bonnet, and the valve rod described
First seal；The first seal top, described filler bottom hole portion are provided with the second seal；In described filler
In hole, the V-type filler combination sealing member between two-layer described filler heelpiece and the lantern sleeve, is both provided with；In described filler
Hole top, is provided with the 3rd sealing member between described filler gland top and the valve rod；Described filler gland with it is described
The 4th sealing member is provided between bonnet,.
Blocking is provided with the detection screwed hole.
Pilot bushing is provided between the bonnet, and the valve rod.
A kind of sealing anti-attrition method of testing based on above-mentioned Deep-sea high voltage valve rod Bidirectional seal structure, which includes following
Step：1) the whole machine of valve for completing assembling makes valve after partially open state, to valve by operating actuator under water
Injection testing medium in body cavity room between body, bonnet, and the examination for testing needed for valve stem seal is pressurized to step by step
Test pressure；2) test pressure is applied to first seal by the space between bonnet, pilot bushing, valve rod by test(ing) medium
On, realize testing the first order sealing of valve rod one end；If 3) seal failure of first seal, test(ing) medium then after
The continuous gap along between bonnet, and valve rod is applied to the pressure that first seal is leaked in second seal, realizes to valve
The second level sealing of bar one end is tested；If 4) seal failure of second seal, test(ing) medium then continue on filler
The pressure that second seal is leaked is applied to the V positioned at stuffing hole bottom by the fit clearance between heelpiece and bonnet, valve rod
On type filler combination sealing member, realize testing the third level sealing of valve rod one end and stuffing hole；5) if located in filler
Seal failure at the V-type filler combination sealing member in bottom hole portion, then leak after test(ing) medium can first annular chamber, second
Inside annular compartment and pod apertures accumulate, eventually through pod apertures and detection screwed hole stream to bonnet, outer surface, it is right to realize
The detection of valve rod side pressure seal performance；6) step 1 being completed)～valve 5) carries out once complete switch motion, then
It is secondary that valve is opened to after partially open state, by body cavity after whether having leakage, detection to terminate at observation detection screwed hole
The safe discharge of test pressure of room；7) after 6) step is completed, to the pressure balance inner chamber injection examination inside actuator under water
Test medium, test(ing) medium is injected into actuator by the pod apertures inside actuator under water and is connected shape after installation with bonnet,
Into bonnet, inner chamber room in, and the test pressure being pressurized to needed for the default depth of water of valve step by step；8) test(ing) medium passes through filler
Test pressure is acted on the 3rd sealing by fit clearance between gland and valve rod, gland and bonnet, stuffing hole respectively
On part, the 4th sealing member, realize testing the first order sealing of the valve rod other end and stuffing hole；If 9) the 3rd sealing
Part, the 4th sealing member separately or concurrently seal failure, test(ing) medium are then continued between gland, pilot bushing, valve rod
The pressure that will leak out of fit clearance act on the V-type filler combination sealing member on stuffing hole top, realize another to valve rod
The second level sealing of one end and stuffing hole is tested；10) at if located in the V-type filler combination sealing member on stuffing hole top
Seal failure, the then test(ing) medium after leaking can be accumulated inside first annular chamber, the second annular compartment and pod apertures, finally
By pod apertures and detection screwed hole stream to the outer surface of bonnet, the detection to valve rod opposite side pressure seal performance is realized；
11) by test verification qualified valve, first pass through detection screwed hole and dry compressed air, clearance test are purged into lantern sleeve
After medium, greasing link of instruments is started into greasing to detection screw thread nose end, grease will be by detection screwed hole, pod apertures to the
After one annular compartment, the second annular compartment fill grease successively, will detection screwed hole closure with blocking.
Due to taking above technical scheme, which has advantages below to the present invention：1st, the present invention is due to adopting in valve stem seal
Balance pressure in the actuator under water at device two ends is respectively acting on two contras of valve rod with the pressure medium in valve
Multiple Combination sealing member upwards, each sealing member adopt self-tightening type structure, sealing force increase with pressure rise, realize valve rod
Bidirection press is sealed.2nd, it is of the invention in order to reduce the frictional resistance of valve rod and sealing member when action runs, on being arranged on
Thread measurement hole on valve gap to stem internal inject grease, improve sealing member service life and valve rod action it is flexible
Property.The present invention extensively can be applied in the control valve field of deep-sea.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples the present invention is described in detail.
As shown in figure 1, the present invention provides a kind of Deep-sea high voltage valve rod Bidirectional seal structure, which includes being arranged on upper valve
Cover the actuator under water at end, sealing under water between actuator and bonnet, valve rod, connection not within the present invention,
Do not elaborate herein, only illustrate by taking bonnet, one end as an example.Sealing structure of the present invention all includes valve body 1, bonnet,
2nd, valve rod 3 and valve stem seal part.Valve body 1 is connected with the lower end of bonnet, 2, and the upper end of bonnet, 2 is connected with actuator under water
Connect (do not illustrate in figure), between bonnet, 2 and valve rod 3, be provided with valve stem seal part.Positioned at valve body 1 and the lower end of bonnet, 2
Between formed body cavity room V1；Bonnet, is formed between the upper end of bonnet, 2 and the connection of actuator under water lower side
Inner cavity chamber V2.Stuffing hole 4 is offered on the bonnet, 2 of actuator one end under water, by fastening spiral shell at the top of stuffing hole 4
Post 5 is installed with gland 6, is provided with two-layer filler heelpiece 7, in two-layer filler in the stuffing hole 4 of 6 bottom of gland
Lantern sleeve 8 is provided between heelpiece 7.In the middle part of lantern sleeve 8, shape between the stuffing hole 4 opened up on lantern sleeve 8 and bonnet, 2
Into first annular chamber V3, the second annular compartment V4 between lantern sleeve 8 and valve rod 3, is formed.Water conservancy diversion is provided with the middle part of lantern sleeve 8
Hole 9, pod apertures 9 are connected with first annular chamber V3, the second annular compartment V4；2 side of bonnet, is provided with detection screwed hole
10, detection screwed hole 10 is connected with first annular chamber V3, pod apertures 9 and the second annular compartment V4 successively.
In above-described embodiment, as shown in figure 1, hermetic unit includes first seal 11, second seal 12, V-type filler
Combination seal 13, the 3rd sealing member 14 and the 4th sealing member 15.In bonnet, 2 and 1 connecting side of valve body, positioned at bonnet, 2 with
First seal 11 is provided between valve rod 3；11 top of first seal, 4 bottom of stuffing hole are provided with second seal 12.
In stuffing hole 4, V-type filler combination sealing member 13 is both provided between two-layer filler heelpiece 7 and lantern sleeve 8 (close near second
The V-type filler of 12 side of sealing is opening down, and the V-type filler near 15 side of the 4th sealing member is opening up, as shown in Figure 1).Filling out
Material 4 top of hole, is provided with the 3rd sealing member 14 between 6 top of gland and valve rod 3；Set between gland 6 and bonnet, 2
The 4th sealing member 15 is equipped with, the 4th sealing member 15 is located at below the 3rd sealing member 14.
In the various embodiments described above, blocking 16 is provided with detection screwed hole 10.
In the various embodiments described above, pilot bushing 17 is provided between bonnet, 2 and valve rod 3.
In sum, Deep-sea high voltage valve rod Bidirectional seal structure of the invention be using 2 two ends of bonnet, under water
Pressure medium P1 in balance pressure P2 in actuator and valve body is respectively acting on multiple in 3 two relative directions of valve rod
Combination seal, each sealing member adopt self-tightening type structure, sealing force increase with pressure rise, realize 3 bidirection press of valve rod
Sealing；Simultaneously in order to reduce the frictional resistance of valve rod and sealing member when action runs, can be by detecting screwed hole 10 to valve rod 3
Internal injection grease, improves the motility of 3 action of service life and valve rod of each sealing member.
As shown in figure 1, the present invention also provides a kind of sealing anti-attrition test of Deep-sea high voltage valve rod Bidirectional seal structure
Method, due to the valve used under abyssal environment, impact of the pressure medium to valve stem seal except valve internal is considered
Outward, the sealing structure one end for considering valve rod is also needed to be affected (in valve by the sealing of the pressure of actuator internal balance under water
To during hanging installation under water it is, with depth of water dynamic change, to be held essentially constant after seabed is installed to first), this is put down
Weighing apparatus pressure realizes change of the actuator internal pressure with outside abyssal environment water depth pressure by deep sea pressure compensating chain device
Change and change, realize the dynamic equilibrium and the pressure protection to actuator under water of external and internal pressure.Valve after coming into operation, valve
Shaft seal will be affected by the collective effect of pressure medium and water depth pressure.Under water high pressure valve manufacture, in checkout procedure,
In order to ensure valve rod sealing, the reliability of action and motility, realize that the long period of valving is non-maintaining, high reliability
Performance, just valve rod leak-proof structure need to be detected.The method of testing of the present invention specifically includes following steps：
1) guarantee inside valve body 1, each part connection such as valve rod 3 and valve matched actuating mechanism it is correct, without obvious at sealing
Damage, valve flowing channel and internal each chamber interior cleaning, foreign；
2) valve components and sealing member are assembled by assemble sequence, be sequentially completed valve final assembly, valve with
The connection of actuator under water, sealing, and valve two ends are blocked.
3) by step 2) in the whole machine of valve that completes of assembling, by operating actuator under water, make valve separate in portion
After opening state, the injection testing medium into the body cavity room V1 between valve body 1, bonnet, 2, and be pressurized to for testing step by step
Test pressure P1 needed for valve stem seal；
4) test pressure P1 is applied to by the space between bonnet, 2, pilot bushing 17, valve rod 3 by test(ing) medium
On one sealing member 11, realize testing the first order sealing of 3 one end of valve rod；
If 5) seal failure of first seal 11, between test(ing) medium is then continued between bonnet, 2 and valve rod 3
Gap is applied to the pressure that first seal 11 is leaked in second seal 12, realizes being sealed into the second level of 3 one end of valve rod
Row test；
If 6) seal failure of second seal 12, test(ing) medium then continues on filler heelpiece 7 and bonnet, 2, valve
It is close that the pressure that second seal 12 is leaked is applied to V-type filler combination positioned at 4 bottom of stuffing hole by the fit clearance between bar 3
On sealing 13 (as shown in Figure 1), realize testing the third level sealing of 3 one end of valve rod and stuffing hole 4；
7) examination if located in the seal failure at the V-type filler combination sealing member 13 of fit clearance bottom, then after leaking
Testing medium can be in the first annular chamber V3 between the lantern sleeve 8 of 2 stuffing hole 4 of bonnet, and bonnet, 2, valve rod 3 and lantern sleeve 8
Between the second annular compartment V4 and pod apertures 9 inside accumulate, eventually through the pod apertures 9 on lantern sleeve 8 and detection screwed hole
Outer surface of 10 streams to bonnet, 2, so as to realize the detection to 3 one lateral pressure P1 sealing property of valve rod.
8) step 3 being completed)～valve 7) carries out once complete switch motion, again the valve portion of being opened to separated
After opening state, by the test pressure of body cavity room safe discharge after whether having leakage, detection to terminate at observation detection screwed hole；
9) after 8) step is completed, to the pressure balance inner chamber injection testing medium inside actuator under water, test is situated between
Matter will be injected into the bonnet, formed after actuator is connected installation with bonnet, 2 by the pod apertures inside actuator under water
In inner cavity chamber V2, and the test pressure P2 being pressurized to needed for the default depth of water of valve step by step；
10) test(ing) medium is by between the cooperation between gland 6 and valve rod 3,2 stuffing hole 4 of gland 6 and bonnet,
Gap acts on test pressure P2 on the 3rd sealing member 14, the 4th sealing member 15 respectively, realizes to 3 other end of valve rod and stuffing hole
4 first order sealing is tested；
If 11) the 3rd sealing member 14, the 4th separately or concurrently seal failure of sealing member 15, test(ing) medium are then continued on
The pressure that 3rd sealing member 14 or the 4th sealing member 15 are leaked by the fit clearance between gland 6, pilot bushing 17, valve rod 3
Power is acted on the V-type filler combination sealing member 13 on 4 top of stuffing hole (as shown in Figure 1), realize to 3 other end of valve rod and
The second level sealing of stuffing hole 4 is tested；
12) examination if located in the seal failure at the V-type filler combination sealing member 13 on 4 top of stuffing hole, then after leaking
Testing medium can be in the first annular chamber V3 between the lantern sleeve 8 of 2 stuffing hole 4 of bonnet, and bonnet, 2, valve rod 3 and lantern sleeve 8
Between the second annular compartment V4 and pod apertures 9 inside accumulate, eventually through the pod apertures 9 on lantern sleeve 8 and detection screwed hole
Outer surface of 10 streams to bonnet, 2, so as to realize the detection to 3 another lateral pressure P2 sealing property of valve rod.
13) complete step 1)～test 12) qualified valve is checked, detection screwed hole 10 is first passed through to lantern sleeve 8
Greasing link of instruments, after clearance test medium, is started greasing to 10 end of detection screwed hole, is moistened by the dry compressed air of interior purging
Consistent lubricant will be by detecting that screwed hole 10, pod apertures 9 are filled after grease successively to first annular chamber V3, the second annular compartment V4
Detection screwed hole 10 is blocked with blocking 16.During 3 action of valve rod, the grease for being stored in the second annular compartment V4 intracavity can drop
Low valve rod 3 and second seal 12, V-type filler combination sealing member 13, first seal 11, the 3rd sealing member 14, pilot bushing
Frictional resistance between 17, increases the service life, it is ensured that 3 flexible movements of valve rod.
In sum, 1500 meters under water are applied the present invention to, the valve rod of rated pressure 5000PSI (34.5MPa) gate valve
During sealing, stuffing hole sealing, sealing test, greasing anti-attrition are designed, through the maximum leakage test pressure that experimental test, valve rod are realized
Power can reach 52MPa, without obvious seepage；Under rated operating pressure 34.5MPa, injection grease testing, the friction of valve rod
Resistance ratios Design Theory value of calculation reduces about 20%～30%, can effectively extend seal durability, it is ensured that valve rod action ground
Motility.The present invention can realize safe and efficient closure by blocking 16 after experiment.
The various embodiments described above are merely to illustrate the present invention, and the structure of each part, size, set location and shape all can be
It is varied from, on the basis of technical solution of the present invention, all improvement individual part carried out according to the principle of the invention and waits
With converting, should not exclude outside protection scope of the present invention.
Claims (1)
1. the sealing anti-attrition method of testing of a kind of Deep-sea high voltage valve rod Bidirectional seal structure, it is characterised in that：The deep-sea
High pressure valve valve rod Bidirectional seal structure includes the actuator under water for being arranged on valve one end, and the sealing structure includes valve
Body, bonnet, valve rod and valve stem seal part；The bonnet, is connected respectively with the valve body, the actuator under water, institute
State and between bonnet, and the valve rod, be provided with the valve stem seal part；The bonnet, side is provided with detection screw thread
Hole；
Stuffing hole is offered on the connection bonnet, of actuator one end under water, by fastening at the top of described filler hole
Stud fixes gland, is provided with two-layer filler heelpiece, in two-layer in the described filler hole of described filler gland bottom
Lantern sleeve is provided between described filler heelpiece；First annular chamber is formed between the lantern sleeve and the bonnet, it is described
The second annular compartment is formed between lantern sleeve and the valve rod；Pod apertures, the pod apertures are provided with the middle part of the lantern sleeve
Connect with the first annular chamber, the second annular compartment；It is described detection screwed hole successively with the first annular chamber, water conservancy diversion
Hole is connected with the second annular compartment；
Positioned at the valve body and the bonnet, connecting side, body cavity room between the valve body and the bonnet, is formed；Position
In the bonnet, and the actuator connecting side under water, the bonnet, and described upper valve between actuator, is formed under water
Cover cavity room；
The valve stem seal part include first seal, second seal, V-type filler combination sealing member, the 3rd sealing member and
4th sealing member；The bonnet, and the valve body connecting side, are provided between the bonnet, and the valve rod described
First seal；The first seal top, described filler bottom hole portion are provided with the second seal；In described filler
In hole, the V-type filler combination sealing member between two-layer described filler heelpiece and the lantern sleeve, is both provided with；In described filler
Hole top, is provided with the 3rd sealing member between described filler gland top and the valve rod；Described filler gland with it is described
The 4th sealing member is provided between bonnet,；
Blocking is provided with the detection screwed hole；Pilot bushing is provided between the bonnet, and the valve rod；
The method comprising the steps of：
1) the whole machine of valve for completing assembling makes valve after partially open state, to valve by operating actuator under water
Injection testing medium in body cavity room between body, bonnet, and the examination for testing needed for valve stem seal is pressurized to step by step
Test pressure；
2) test(ing) medium is applied to test pressure in first seal by the space between bonnet, pilot bushing, valve rod,
Realize testing the first order sealing of valve rod one end；
If 3) seal failure of first seal, test(ing) medium then continues on gap between bonnet, and valve rod by first
The pressure of seal leakage is applied in second seal, realizes testing the second level sealing of valve rod one end；
If 4) seal failure of second seal, test(ing) medium are then continued between filler heelpiece and bonnet, valve rod
Fit clearance is applied to the pressure that second seal is leaked on the V-type filler combination sealing member of stuffing hole bottom, realizes
Third level sealing to valve rod one end and stuffing hole is tested；
5) the test(ing) medium meeting if located in the seal failure at the V-type filler combination sealing member of stuffing hole bottom, then after leaking
Accumulate inside first annular chamber, the second annular compartment and the pod apertures, eventually through pod apertures and detection screwed hole stream to upper
The outer surface of valve gap, realizes the detection to valve rod side pressure seal performance；
6) step 1 being completed)～valve 5) carries out once complete switch motion, and valve is opened to into part again and opens shape
After state, by the test pressure of body cavity room safe discharge after whether having leakage, detection to terminate at observation detection screwed hole；
7) after 6) step is completed, to the pressure balance inner chamber injection testing medium inside actuator under water, test(ing) medium leads to
The pod apertures crossed inside actuator under water are injected into the bonnet, inner cavity chamber formed after actuator is connected installation with bonnet,
It is interior, and the test pressure being pressurized to needed for the default depth of water of valve step by step；
8) test(ing) medium respectively will examination by the fit clearance between gland and valve rod, gland and bonnet, stuffing hole
Test pressure to act on the 3rd sealing member, the 4th sealing member, realize carrying out the first order sealing of the valve rod other end and stuffing hole
Test；
If 9) the 3rd sealing member, the 4th sealing member separately or concurrently seal failure, test(ing) medium then continue on gland,
The pressure that fit clearance between pilot bushing, valve rod will leak out acts on the V-type filler combination positioned at stuffing hole top and seals
On part, realize testing the second level sealing of the valve rod other end and stuffing hole；
10) the test(ing) medium meeting if located in the seal failure at the V-type filler combination sealing member on stuffing hole top, then after leaking
Accumulate inside first annular chamber, the second annular compartment and the pod apertures, eventually through pod apertures and detection screwed hole stream to upper
The outer surface of valve gap, realizes the detection to valve rod opposite side pressure seal performance；
11) by test verification qualified valve, first pass through detection screwed hole and dry compressed air is purged into lantern sleeve, remove
After test(ing) medium, greasing link of instruments to detection screw thread nose end is started into greasing, grease will be by detecting screwed hole, pod apertures
Filled after grease successively to first annular chamber, the second annular compartment, will detection screwed hole closure with blocking.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510222208.2A CN104832703B (en) | 2015-05-04 | 2015-05-04 | A kind of Deep-sea high voltage valve rod Bidirectional seal structure and sealing anti-attrition method of testing |
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| CN201510222208.2A CN104832703B (en) | 2015-05-04 | 2015-05-04 | A kind of Deep-sea high voltage valve rod Bidirectional seal structure and sealing anti-attrition method of testing |
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| CN104832703B true CN104832703B (en) | 2017-03-29 |
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| CN118030875B (en) * | 2024-04-15 | 2024-07-05 | 宁波高悦智能科技有限公司 | Liquid flow regulating valve |
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Co-patentee after: Wuzhong Instrument Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: China National Offshore Oil Corporation Co-patentee before: Wuzhong Instrument Co., Ltd. |
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