CN109459189A - The graphite-seal ring of metal hard-sealing ball valve installs testing tool - Google Patents
The graphite-seal ring of metal hard-sealing ball valve installs testing tool Download PDFInfo
- Publication number
- CN109459189A CN109459189A CN201811147082.7A CN201811147082A CN109459189A CN 109459189 A CN109459189 A CN 109459189A CN 201811147082 A CN201811147082 A CN 201811147082A CN 109459189 A CN109459189 A CN 109459189A
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- Prior art keywords
- graphite
- seal ring
- valve body
- valve
- metal hard
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- 238000007789 sealing Methods 0.000 title claims abstract description 89
- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 239000002184 metal Substances 0.000 title claims abstract description 25
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000002093 peripheral effect Effects 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 abstract description 10
- 238000009434 installation Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 13
- 238000013461 design Methods 0.000 description 13
- 229910002804 graphite Inorganic materials 0.000 description 13
- 239000010439 graphite Substances 0.000 description 13
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007770 graphite material Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009304 pastoral farming Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011960 computer-aided design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/12—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water
-
- 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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
- F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
Abstract
The invention discloses a kind of graphite-seal rings of metal hard-sealing ball valve to install testing tool, including pedestal and pressing plate, the tool use the valve body, valve seat and seal ring seat of metal hard-sealing ball valve；The pedestal is detachably connected on the lower end of the valve body and seals the lower port of the valve body；The pressing plate is pressed on the upper end of the valve seat and by the channel seal of the valve seat, and the upper end inner wall of the upper surface and the valve body of the outer peripheral surface of the pressing plate and the valve seat surrounds the observation annular groove of the air-tightness for accommodating liquid.The present invention is able to solve all kinds of problems in the installation and debugging process of graphite-seal ring, simplifies debugging step, tests the sealing performance and affecting parameters of sealing ring, greatly improve the installation and debugging efficiency of metal hard-sealing ball valve.
Description
Technical field
The present invention relates to valve fields, relate in particular to a kind of graphite-seal ring installation test of metal hard-sealing ball valve
Tool.
Background technique
With the propulsion of improvement and the energy-saving and emission-reduction of chemical process, more and more devices are constantly mentioning equipment requirement
There is the operating condition that high temperature and pressure deep-etching coexists in height, and low leakage requirement is also needed to meet under the operating condition, so demand is a kind of
The stop valve reliably cut off can be realized under this operating condition, because of ball valve the operation is stable, heat-resisting ability is strong, adapts to various harsh works
Condition, therefore metal hard-sealing ball valve comes into being.
Currently, the sealing ring of metal seal ball valve is technical problem recognized within the industry, graphite material high temperature high voltage resistant resists
Oxidation is not reacted with existing most media, so being one of ideal material of sealing ring, is made using graphite material
When for sealing material, because processing technology limits, with a batch of graphite-seal ring, there are the differences of density, size, decrement etc.
It is different, cause with a batch of valve, sealing ring performance has corresponding difference, it is therefore desirable to which one is close for testing graphite-seal ring
The tool of sealing property, compression performance and mounting groove size, and lack such tool in the prior art.
Summary of the invention
Technical problem to be solved by the invention is to provide one kind to carry out precommpression to graphite-seal ring, and being capable of mould
True environment is drawn up to detect the graphite-seal ring of the metal hard-sealing ball valve of the air-tightness of graphite-seal ring installation testing tool.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme: the graphite grazing of metal hard-sealing ball valve
Ring installs testing tool, including pedestal and pressing plate, the tool use the valve body, valve seat and sealing ring of metal hard-sealing ball valve
Seat；
At tubular, the upper end inner wall of the valve body is recessed outward and is formed along valve body circumferentially extending in a ring the valve body
Mounting groove, the pedestal be detachably connected on the lower end of the valve body and by the lower port of the valve body seal, the pedestal
It is equipped with the vent cap being connected to the inner cavity of the valve body；
The graphite-seal ring and the seal ring seat are successively supported in the mounting groove from top to bottom, and the valve seat is in ring
Shape, the graphite-seal ring are set in the outer peripheral surface of the valve seat, and the upper end outer wall of the valve seat is protruded outward and formed along institute
The flange in a ring of valve seat circumferentially extending is stated, the flange is pressed on the upper end of the graphite-seal ring, and the pressing plate pressure is set
The valve seat upper end and by the channel seal of the valve seat, and the upper surface of the outer peripheral surface of the pressing plate and the valve seat with
And the upper end inner wall of the valve body surrounds the observation annular groove of the air-tightness for accommodating liquid.
Further, the tool also uses the butterfly spring of metal hard-sealing ball valve, and the butterfly spring pad is located at
The lower end of the seal ring seat.
Further, the top surface of the pedestal has first boss, and the first boss is caught in the valve body, and described
First sealing ring is installed between the outer peripheral surface of first boss and the inner wall of the valve body.
Further, the vent cap extends to the top surface of the first boss from the outer peripheral surface of the pedestal.
Further, the air inlet of the vent cap is equipped with gas source interface.
Further, the bottom surface of the pressing plate is equipped with second boss, and the second boss is caught in the valve seat, and described
Second sealing ring is installed between the outer peripheral surface of second boss and the inner peripheral surface of the valve seat.
Further, the pedestal is equipped with multiple studs, and the stud passes through the valve body and uses nut check, with
This realizes that the pedestal is detachably connected on the lower end of the valve body.
The invention has the benefit that
The present invention utilizes the part testing of product itself, reduces influence of the other factors to graphite-seal ring leakage test, energy
Enough simulation graphite-seal rings can carry out precommpression in the true working condition of valve inner to graphite-seal ring, and can be with
The air-tightness for intuitively detecting graphite-seal ring, can study influence of the multiple parameters to sealing performance, to graphite-seal ring
Properties are detected and are tested, and are made it in the case where meeting leakage rate requirement, are adjusted relevant parameter, make graphite-seal ring
Meet design requirement.
The present invention is able to solve all kinds of problems in the installation and debugging process of graphite-seal ring, simplifies debugging step, test
The sealing performance and affecting parameters of sealing ring greatly improve the installation and debugging efficiency of metal hard-sealing ball valve.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of the invention.
Fig. 2 is the structural exploded view of one embodiment of the invention.
Fig. 3 is enlarged drawing at A.
The label of each component in attached drawing are as follows: 1 pedestal, 11 first boss, 12 first sealing rings, 13 vent caps, 14 gas sources
Interface, 2 pressing plates, 21 second boss, 22 second sealing rings, 3 graphite-seal rings, 4 valve bodies, 5 valve seats, 6 seal ring seats, 7 butterfly bullets
Spring, 8 studs, 9 nuts, C1 mounting groove, C2 air-tightness observe annular groove, m decrement reference planes.
Specific embodiment
It is next below with reference to the accompanying drawings that the present invention will be described in detail.It should be noted that in the absence of conflict, in the present invention
Embodiment and embodiment in feature can be combined with each other.
Referring to Fig. 1 to Fig. 3.
The graphite-seal ring of metal hard-sealing ball valve of the present invention installs testing tool, including pedestal 1 and pressing plate 2, the work
Tool uses the valve body 4, valve seat 5 and seal ring seat 6 of metal hard-sealing ball valve；
The valve body 4 at tubular, the upper end inner wall of the valve body 4 be recessed outward and formed along the valve body 4 circumferentially extending be in
The mounting groove C1 of annular, the pedestal 1 are detachably connected on the lower end of the valve body 4 and seal the lower port of the valve body 4,
The pedestal 1 is equipped with the vent cap 13 being connected to the inner cavity of the valve body 4,
The graphite-seal ring 3 and the seal ring seat 6 are successively supported on from top to bottom in the mounting groove C1, the valve seat 5
Annularly, the graphite-seal ring 3 is set on the valve seat 5, and the upper end outer wall of the valve seat 5 is protruded outward and formed along institute
The flange in a ring of the circumferentially extending of valve seat 5 is stated, the flange is pressed on the upper end of the graphite-seal ring 3, and the pressing plate 2 is pressed
It is located at the upper end of the valve seat 5 and by the channel seal of the valve seat 5, and the outer peripheral surface of the pressing plate 2 and the valve seat 5 is upper
The upper end inner wall of end face and the valve body 4 surrounds the observation of the air-tightness for accommodating liquid annular groove C2.
The present invention can carry out precommpression and the air-leakage test of graphite-seal ring, and concrete operations are as follows:
According to being described above, component is assembled, i.e., removes butterfly spring on the basis of shown in Fig. 1, it then will be whole
It is put on Universal spring testing machine, loads normal pressure (1.5 ~ 3 times of butterfly spring elastic force) on pressing plate, graphite-seal ring is carried out
Precommpression；
After the completion of precommpression, spring testing machine is enabled to keep 1 times of butterfly spring design elastic force position, via vent cap into valve body
It is passed through the instrument air of 400Kpa, and injects suds in air-tightness observation annular groove, observation has bubble-free, detects graphite with this
The air-tightness of sealing ring.
Under normal circumstances, ball valve uses the combination of multi-disc graphite-seal ring, and there are gap, ball valves between sealing ring
Disc spring provide elastic force it is limited, if be mounted directly, will lead to ball valve after a period of work, because of the work of pressure medium
With after the filling of original gap, the decrement of graphite reduces, and resilience performance is deteriorated, and ball valve is caused to leak.
And the part testing of product itself is utilized through the invention, other factors are reduced to graphite-seal ring leakage test
Influence, graphite-seal ring can be simulated in the true working condition of valve inner, in a pre-installation, to graphite in true part
Sealing ring carries out the precompression treatment of more times of pressure, can eliminate between graphite linings and graphite linings, between sealing ring and sealing ring,
Gap between sealing ring and mounting groove is protected so that sealing ring, which can be realized, in the preload of lesser disk-shaped spring elasticity squeezes sealing
Demonstrate,prove sealing ring pressure resistance performance.
In addition, the present invention is also able to achieve the decrement detection and debugging of graphite-seal ring, specifically also to use and arrive metallic hard
The butterfly spring of seal ball-valve, concrete operations are as follows:
Pressing plate after above-mentioned precommpression and air-leakage test is removed, the pad of butterfly spring 7 is then located at the sealing ring
The lower end of seat later similarly, will be integrally put on Universal spring testing machine as Fig. 1 show, 1 times of dish of load on pressing plate
The normal pressure of shape spring force carries out precommpression, and the upper plane for measuring pressing plate at this time is upper to decrement reference planes m(, that is, valve body
End face) height, utilize this height, so that it may calculate the reduced overall amount of graphite-seal ring and disk spring, then with drawing
Design value compares, and can show that the surplus for needing additional work is debugged, and when debugging, 1 times of load is being just still on pressing plate
Pressure carries out precommpression, keeps Universal spring testing machine height constant, is passed through the instrument of 400Kpa into valve body from vent cap
Gas source, and inject suds in air-tightness observation annular groove, observation has bubble-free, detects the air-tightness of graphite-seal ring and entire
The sealing performance of graphite grazing ring position, and the elastic force of disk spring and the decrement of graphite-seal ring are adjusted in time, make graphite
Sealing ring reaches optimal decrement, meets leakage rate requirement.
In the prior art, the decrement for often ignoring soft graphite is not fixed this technical detail, only considers disk spring
Mechanical property, to guarantee disk-shaped spring elasticity.But individually guarantee that the performance of each part does not ensure that whole synthesis
Performance.
And can then analyse in depth the sealing performance and working condition of graphite-seal ring through the invention, by disk spring,
Graphite-seal ring, seal ring seat and valve seat consider that the valve seat of fixing ball valve is provided just using disk spring as a whole
Beginning face pressure, in this process, disk spring needs to provide the pressure of compressed graphite sealing ring, while need to provide valve seat with
Initial face pressure between sphere, so this integrally possesses a fixed overall height in the operating condition, close to graphite
During seal ring carries out pressure testing, takes a disk spring design elastic force to compress this entirety, this will be measured indirectly
A whole decrement, and included the dimensional tolerance of each part, this total height is compared with design, obtains dish
The decrement difference of spring and graphite-seal ring synthesis carries out reworked processing to correlation adjustment part on this basis, can be real
Existing sealing ring is suitable with design value, guarantees under design butterfly spring elastic force, the total height of had part meets design at sealed letter
Value.
Based on aforesaid operations, the present invention can also realize following functions: the present invention can be measured more using control variate method
A parameter influences sealing performance, can pass through control variate method, test surfaces such as sealing ring decrement, pressure, sealing ring width
Degree, the influence of sealing ring density, sealing ring tolerance, mounting groove size, mounting groove tolerance, mounting groove roughness to sealing performance,
Obtain optimal design parameter, can kit realize the corresponding relationships of test multiple parameters and sealing performance, and verify structure
Feasibility, it is one-stop to solve the problems, such as that metal hard-sealing ball valve debugging is difficult in industry.
The prior art realizes the performance for detecting the same specification, in this way, such as most commonly by general kit
The sealing performance of fruit graphite-seal ring is more apparent to individual difference, and exchange performance is poor, and will lead to test accuracy, there are query, institutes
With rigorous comparative test, the working condition of sealing ring need to be restored as far as possible, and there are the means of control variable.
And the present invention then utilizes the part of product itself, reduces other factors to the shadow of graphite-seal ring leakage test
It rings, working condition of the graphite-seal ring inside ball valve can be restored, simulate true media environment, test graphite-seal ring is true
The multiple parameters such as the mechanical property of compressibility energy, sealing performance and disk spring under working environment also can be used control and become
Amount method acquires influence of each relevant parameter to sealing performance respectively, to obtain several optimal seal parameters, Computer Aided Design is excellent
Change and conceptual design one-stop can solve sealing ring and debug all kinds of problems faced in assembling and setting.
It is more demanding to its because of the elastic element that disk spring is ball valve system in specific implementation, it is typically designed normal
Working condition makes its long compressive 50% or so, provides an effective elastic force, to valve seat for sealing between sphere and valve seat
Initial face pressure, while provide an elastic force compressed graphite sealing ring, make sealing ring realize sealing.
In one embodiment, the top surface of the pedestal 1 has first boss 11, and the first boss 11 is caught in the valve body
First sealing ring 12 is installed in 4, and between the outer peripheral surface of the first boss 11 and the inner wall of the valve body 4, is realized with this
Valve seat seals the lower port of valve body, and this mode, structure is simple, is easy to implement and sealing effect is reliable.
In one embodiment, the vent cap 13 extends to the first boss 11 from the outer peripheral surface of the pedestal 1
Top surface.It designs in this way, it is structurally reasonable, it is easy to implement.
In one embodiment, the air inlet of the vent cap 13 is equipped with gas source interface 14.It is convenient for using gas source interface
It is passed through gas source.
In one embodiment, the bottom surface of the pressing plate 2 is equipped with second boss 21, and the second boss 21 is caught in the valve seat
Second sealing ring 22 is installed, with this reality in 5, and between the outer peripheral surface of the second boss 21 and the inner peripheral surface of the valve seat 5
Existing pressing plate is by the channel seal of valve seat, likewise, this mode, structure is simple, is easy to implement and sealing effect is reliable.
In one embodiment, the pedestal 1 is equipped with multiple studs 8, and the stud 8 passes through the valve body 4 and uses spiral shell
Mother 9 locks, and realizes that the pedestal 1 is detachably connected on the lower end of the valve body 4 with this.This detachable connection method, structure
Simply, it is easy to implement, and firm and reliable connection.
In the prior art, to the use of graphite-seal ring, data source both from offshore company correlation experience, substantially
All it is the test under specific operation to single condition, can test multiple parameters simultaneously to the work of sealing performance influence factor
Tool, and the not data under real working condition, in addition, this tool can be realized the feasibility under real working condition to the sealing structure
It is verified.And the present invention can kit realize the corresponding relationships of test multiple parameters and sealing performance, and verifying structure can
Row can test such as sealing ring decrement, pressure, sealing ring width, sealing ring density, sealing ring by control variate method
The influence of tolerance, mounting groove size, mounting groove tolerance, mounting groove roughness to graphite-seal ring performance, auxiliary parameter design and
Structure design acquisition related data, experimentally verifies the feasibility and correctness of structure and scheme, obtains optimal set
Count parameter.
Integrated seal ring precommpression of the present invention, sealing performance examine, the detection of disk spring force value and adjustment, valve seat and sealing
Groove tolerance and roughness multiple functions such as influence in one to sealing ring sealing performance, and sealed groove position uses product completely
Part, and the effectively pressure medium situation and components stress condition of reduction ball valve during the work time, guarantee control variable only
One, the relationship that each Parameters variation influences performance is found by the method for controlling variable.To guarantee each graphite of installation
Sealing ring is owned by optimal service performance.Sealing ring compressibility energy, sealing performance, butterfly spring mechanical property etc. can be tested
Multiple parameters.
It should be understood that example as described herein and embodiment are not intended to restrict the invention, this field only for explanation
Technical staff can make various modifications or variation according to it, all within the spirits and principles of the present invention, made any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (7)
1. the graphite-seal ring of metal hard-sealing ball valve installs testing tool, it is characterised in that: including pedestal and pressing plate, the work
Tool uses the valve body, valve seat and seal ring seat of metal hard-sealing ball valve；
At tubular, the upper end inner wall of the valve body is recessed outward and is formed along valve body circumferentially extending in a ring the valve body
Mounting groove, the pedestal be detachably connected on the lower end of the valve body and by the lower port of the valve body seal, the pedestal
It is equipped with the vent cap being connected to the inner cavity of the valve body；
The graphite-seal ring and the seal ring seat are successively supported in the mounting groove from top to bottom, and the valve seat is in ring
Shape, the graphite-seal ring are set in the outer peripheral surface of the valve seat, and the upper end outer wall of the valve seat is protruded outward and formed along institute
The flange in a ring of valve seat circumferentially extending is stated, the flange is pressed on the upper end of the graphite-seal ring, and the pressing plate pressure is set
The valve seat upper end and by the channel seal of the valve seat, and the upper surface of the outer peripheral surface of the pressing plate and the valve seat with
And the upper end inner wall of the valve body surrounds the observation annular groove of the air-tightness for accommodating liquid.
2. the graphite-seal ring of metal hard-sealing ball valve according to claim 1 installs testing tool, it is characterised in that: institute
The butterfly spring that tool also uses metal hard-sealing ball valve is stated, the butterfly spring pad is located at the lower end of the seal ring seat.
3. the graphite-seal ring of metal hard-sealing ball valve according to claim 1 or 2 installs testing tool, feature exists
In: the top surface of the pedestal has first boss, and the first boss is caught in the valve body, and the periphery of the first boss
First sealing ring is installed between face and the inner wall of the valve body.
4. the graphite-seal ring of metal hard-sealing ball valve according to claim 3 installs testing tool, it is characterised in that: institute
State the top surface that vent cap extends to the first boss from the outer peripheral surface of the pedestal.
5. the graphite-seal ring of metal hard-sealing ball valve according to claim 1 or 2 installs testing tool, feature exists
In: the air inlet of the vent cap is equipped with gas source interface.
6. the graphite-seal ring of metal hard-sealing ball valve according to claim 1 or 2 installs testing tool, feature exists
In: the bottom surface of the pressing plate is equipped with second boss, and the second boss is caught in the valve seat, and the periphery of the second boss
Second sealing ring is installed between face and the inner peripheral surface of the valve seat.
7. the graphite-seal ring of metal hard-sealing ball valve according to claim 1 or 2 installs testing tool, feature exists
In: the pedestal is equipped with multiple studs, and the stud passes through the valve body and uses nut check, realizes the pedestal with this
It is detachably connected on the lower end of the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811147082.7A CN109459189A (en) | 2018-09-29 | 2018-09-29 | The graphite-seal ring of metal hard-sealing ball valve installs testing tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811147082.7A CN109459189A (en) | 2018-09-29 | 2018-09-29 | The graphite-seal ring of metal hard-sealing ball valve installs testing tool |
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| CN109459189A true CN109459189A (en) | 2019-03-12 |
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ID=65607167
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| CN201811147082.7A Pending CN109459189A (en) | 2018-09-29 | 2018-09-29 | The graphite-seal ring of metal hard-sealing ball valve installs testing tool |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109883614A (en) * | 2019-03-14 | 2019-06-14 | 上海市特种设备监督检验技术研究院 | A kind of ball-valve sealing base test mould and application method |
| CN113514198A (en) * | 2021-07-30 | 2021-10-19 | 重庆川仪调节阀有限公司 | Flexible graphite sealing ring sealing performance experimental device and testing method |
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