CN108591511A - A kind of cryogenic valve - Google Patents
A kind of cryogenic valve Download PDFInfo
- Publication number
- CN108591511A CN108591511A CN201810231047.7A CN201810231047A CN108591511A CN 108591511 A CN108591511 A CN 108591511A CN 201810231047 A CN201810231047 A CN 201810231047A CN 108591511 A CN108591511 A CN 108591511A
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- China
- Prior art keywords
- parts
- valve
- lip
- ring
- sealing
- 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.)
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Classifications
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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
- 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
- F16K5/0657—Particular coverings or materials
-
- 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
- F16K5/0673—Composite packings
-
- 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
- F16K5/0689—Packings between housing and plug
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a kind of cryogenic valves comprising：Valve body, lip-shaped ring, valve seat bearing, snap ring, spring base, butterfly spring, sealing ring, sphere.Compared to O-ring other than leaning on crimp to realize sealing under room temperature, it must also be at low ambient temperatures, low-temperature deformation is overcome to be influenced caused by sealing by the compensation of spring force, and the lip-type packing resistance to cold of the present invention is good, corrosion resistance and good, elasticity is good, can greatly extend the service life of valve.
Description
Technical field
The present invention relates to a kind of cryogenic valves, belong to valve technology field.
Background technology
Recent decades, it is more and more to the demand of Subzero valve in engineering project with the development of modern science and technology.It is low
Warm valve uses more in fields such as chemical fertilizer, LNG and petrochemical industries.The medium that Subzero valve is controlled is in addition to liquid nitrogen and other
Outside liquid inert gas, most of medium is not only inflammable, explosive, and can gasify in heating or flash distillation, causes body
Product drastically expands, and is easy to cause leakage and explosion.Based on the requirement that medium feature and adaptation valve use at low temperature, low temperature valve
Design, manufacture, experiment and the installation method etc. of door have difference with common valve.
Because its tool is there are one outstanding feature, the volume ratio of low-temperature liquefaction and gas at normal temperature is liquefied natural gas (LNG)
1:600, so having the great advantage such as transport, storage, in recent years, growth momentum is very fast.Meanwhile LNG is because of it
Temperature low (- 163 DEG C), it is inflammable and explosive the features such as, higher, tightened up requirement are proposed with Subzero valve to LNG projects,
It is required that LNG cryogenic valve service lifes are long, and securely and reliably, energy on-line maintenance etc..Currently, country's LNG engineerings are with ultralow
Warm top-loading ball valve substantially relies on import, and other than price height, delivery date and after-sale service are difficult to be guaranteed.
For ultralow temperature top-loading ball valve, to avoid metal from becoming under ultralow-temperature operation conditions with nonmetallic materials (PCTFE)
The inconsistent influence valve seal performance of shape, should rationally design the valve seat construction of ball valve.Under normal circumstances, ball valve sealing is mainly by ball
Sealing between body and valve seat, valve seat and valve body is realized.For LNG ultra-low temperature ball valves, seat leakage channel be mainly valve seat with
Between sphere, valve seat insert and sphere and the bearing of valve seat insert and valve seat.Using band elastic energy storage between valve seat and sphere
Lip-type packing (LIPSEAL), overcome to deform under metal and nonmetallic ultralow-temperature operation conditions and inconsistent realize sealing, valve seat
It tries hard to keep by pre-tightening disk spring and medium between sealing ring and sphere and demonstrate,proves sealing.And for ultra-low temperature surroundings operating mode, valve base sealing
Leakage path between circle and valve seat bearing is often ignored, is also not easily found solution.Through using band compensation sealing power
Valve seat construction, rationally design production technology, solve valve seat bearing with valve seat insert deform it is inconsistent and influence sealing
Problem.Meanwhile because valve base sealing material is engineering plastics, to realize the sealing performance of valve seat, it is necessary to apply certain pretightning force
With meet material must than pressure, and under pressure medium institute's stress no more than material it is allowable than pressure, lead to sealing material
There must be certain contact width between material and sphere.However, existing engineering plastics often do not grow by the service life, it is easily damaged and lets out
Leakage accident.
In view of this, applicant provides a kind of novel cryogenic valve, good airproof performance, long lifespan is safe to use.
Invention content
The object of the present invention is to provide a kind of novel cryogenic valve, good airproof performance, long lifespan is safe to use.
Technical problems to be solved needed for the present invention can be achieved through the following technical solutions.
For cryogenic ball valve, lip-type packing other than leaning on crimp to realize sealing under room temperature, is gone back compared to O shapes circle
It has at low ambient temperatures, overcomes low-temperature deformation to be influenced caused by sealing by the compensation of spring force.Therefore for same rule
The ball seat of lattice, available lip-shaped ring cross-sectional width ratio O shape ring cross-section diameters are big, and corresponding valve torque is also big.Cause
This, uses valve base sealing loop material the ultralow temperature top-loading ball valve of engineering plastic PC TFE, rationally designs and selection seals
The sectional dimension for enclosing contact width and lip-type packing, will directly affect the operation performance of as switch and overpressure relief function of valve.
A kind of cryogenic valve comprising：
Valve body, lip-shaped ring, valve seat bearing, snap ring, spring base, butterfly spring, sealing ring, sphere.
Preferably, the preparation method of the lip-shaped ring is as follows：
（1）The purple ball algae of fermentation：
0.5 times for the treatment of fluid by purple ball algae plus dry weight mixes moistening, according to 0.5% inoculating lactic acid piece coccus of inoculum concentration
（GIM1.263）, 37 degrees Celsius ferment 8-10 hours；
The treatment fluid is：According to mass fraction, 1% lactic acid, 0.5-0.8% trehaloses；
（2）Drying and calcining：
By after fermentation purple ball algae drying after, 400-450 degrees Celsius calcine 3-5 hour, ball milling, mistake 200 mesh sieve purple ball algae is forged
It is spare to burn powder；
（3）Configure raw material：
According to weight fraction, 100 parts of fluorubber, 3 parts of the diatomite that 8. 5 μm of grain size, 1-2 parts of white carbon, purple ball algae calcining powder
It is 0.5-1.2 parts last, 4 parts of magnesia, 0.8 part of calcium hydroxide, 2 parts of cumyl peroxide；
（4）It is uniformly kneaded using open mill by formula, Bao Tong, bottom sheet, is stored at room temperature 24 h;
Vulcanizing press vulcanizes, and one section and two sections of compression molding conditions are respectively 125 DEG C × 30min and 200 DEG C ×
60min；
（5）Shape is polished.
Water used in the present invention is through activated carbon or the processed soft water of water-softening plant.
Newly think carefully that CMT-4104 type microcomputer controlled electronic universal testers measure material tensile property, test using Shenzhen
Standard is GB/T 528-2009.
Acid corrosion-resistant performance is tested according to GB/T 1690-2010.Dumbbell specimen, which is dipped in mass fraction, is
In 20% hydrochloric acid hydrothermal reaction kettle, 24 h are placed in 100 DEG C of dry drying boxes of electric heating constant temperature air blast, mechanical property is carried out after taking-up
It can test.
Resistance to cold test method：Dumbbell specimen is placed to 24 h in -200 DEG C, physical property survey is carried out after taking-up
Examination.
Advantages of the present invention：
The present invention provides a kind of cryogenic valves comprising valve body, lip-shaped ring, valve seat bearing, snap ring, spring base, butterfly spring are close
Seal, sphere are defined butterfly circle, remain to keep good sealing performance, long lifespan durable under ultra-low temperature surroundings.
Description of the drawings
Fig. 1 is valve seat construction, wherein：
1. valve body, 2. lip-shaped rings, the bearing of 3. valve seats, 4. snap rings, 5. spring bases, 6. butterfly springs, 7. sealing rings, 8. balls
Body.
Specific implementation mode
The embodiment of the present invention is described below in detail, the embodiment is only used for explaining the present invention, and should not be understood as pair
The limitation of the present invention.
Specific embodiments of the present invention are as described below.
Embodiment 1
A kind of cryogenic valve comprising：
Valve body, lip-shaped ring, valve seat bearing, snap ring, spring base, butterfly spring, sealing ring, sphere.
The preparation method of the lip-shaped ring is as follows：
（1）The purple ball algae of fermentation：
0.5 times for the treatment of fluid by purple ball algae plus dry weight mixes moistening, according to 0.5% inoculating lactic acid piece coccus of inoculum concentration
（GIM1.263）, 37 degrees Celsius ferment 8 hours；
The treatment fluid is：According to mass fraction, 1% lactic acid, 0.5% trehalose；
（2）Drying and calcining：
After the purple ball algae drying after fermentation, 400 degrees Celsius are calcined 3 hours, ball milling, are crossed 200 mesh and are sieved to obtain purple ball algae calcined powder
It is spare；
（3）Configure raw material：
According to weight fraction, 100 parts of fluorubber, 3 parts of the diatomite that 8. 5 μm of grain size, 1 part of white carbon, purple ball algae calcined powder
0.5 part, 4 parts of magnesia, 0.8 part of calcium hydroxide, 2 parts of cumyl peroxide；
（4）It is uniformly kneaded using open mill by formula, Bao Tong, bottom sheet, is stored at room temperature 24 h;
Vulcanizing press vulcanizes, and one section and two sections of compression molding conditions are respectively 125 DEG C × 30min and 200 DEG C ×
60min；
（5）Shape is polished.
Embodiment 2：
A kind of cryogenic valve comprising：
Valve body, lip-shaped ring, valve seat bearing, snap ring, spring base, butterfly spring, sealing ring, sphere.
The preparation method of the lip-shaped ring is as follows：
（1）The purple ball algae of fermentation：
0.5 times for the treatment of fluid by purple ball algae plus dry weight mixes moistening, according to 0.5% inoculating lactic acid piece coccus of inoculum concentration
（GIM1.263）, 37 degrees Celsius ferment 10 hours；
The treatment fluid is：According to mass fraction, 1% lactic acid, 0.8% trehalose；
（2）Drying and calcining：
After the purple ball algae drying after fermentation, 450 degrees Celsius are calcined 5 hours, ball milling, are crossed 200 mesh and are sieved to obtain purple ball algae calcined powder
It is spare；
（3）Configure raw material：
According to weight fraction, 100 parts of fluorubber, 3 parts of the diatomite that 8. 5 μm of grain size, 2 parts of white carbon, purple ball algae calcined powder
1.2 parts, 4 parts of magnesia, 0.8 part of calcium hydroxide, 2 parts of cumyl peroxide；
（4）It is uniformly kneaded using open mill by formula, Bao Tong, bottom sheet, is stored at room temperature 24 h;
Vulcanizing press vulcanizes, and one section and two sections of compression molding conditions are respectively 125 DEG C × 30min and 200 DEG C ×
60min；
（5）Shape is polished.
Embodiment 3
A kind of cryogenic valve comprising：
Valve body, lip-shaped ring, valve seat bearing, snap ring, spring base, butterfly spring, sealing ring, sphere.
The preparation method of the lip-shaped ring is as follows：
（1）The purple ball algae of fermentation：
0.5 times for the treatment of fluid by purple ball algae plus dry weight mixes moistening, according to 0.5% inoculating lactic acid piece coccus of inoculum concentration
（GIM1.263）, 37 degrees Celsius ferment 9 hours；
The treatment fluid is：According to mass fraction, 1% lactic acid, 0.5-0.8% trehaloses；
（2）Drying and calcining：
After the purple ball algae drying after fermentation, 430 degrees Celsius are calcined 4 hours, ball milling, are crossed 200 mesh and are sieved to obtain purple ball algae calcined powder
It is spare；
（3）Configure raw material：
According to weight fraction, 100 parts of fluorubber, 3 parts of the diatomite that 8. 5 μm of grain size, 1.6 parts of white carbon, purple ball algae calcining powder
0.9 part of end, 4 parts of magnesia, 0.8 part of calcium hydroxide, 2 parts of cumyl peroxide；
（4）It is uniformly kneaded using open mill by formula, Bao Tong, bottom sheet, is stored at room temperature 24 h;
Vulcanizing press vulcanizes, and one section and two sections of compression molding conditions are respectively 125 DEG C × 30min and 200 DEG C ×
60min；
（5）Shape is polished.
Embodiment 4
Powder is calcined in comparative example, purple autumn algae azymic：
A kind of cryogenic valve comprising：
Valve body, lip-shaped ring, valve seat bearing, snap ring, spring base, butterfly spring, sealing ring, sphere.
The preparation method of the lip-shaped ring is as follows：
（1）After the drying of purple ball algae, 400 degrees Celsius are calcined 5 hours, ball milling, cross 200 mesh sieve purple ball algae calcined powder is spare；
（2）Configure raw material：
According to weight fraction, 100 parts of fluorubber, 3 parts of the diatomite that 8. 5 μm of grain size, 1.8 parts of white carbon, purple ball algae calcining powder
0.9 part of end, 4 parts of magnesia, 0.8 part of calcium hydroxide, 2 parts of cumyl peroxide；
（3）It is uniformly kneaded using open mill by formula, Bao Tong, bottom sheet, is stored at room temperature 24 h;
Vulcanizing press vulcanizes, and one section and two sections of compression molding conditions are respectively 125 DEG C × 30min and 200 DEG C ×
60min；
（4）Shape is polished.
5 performance test of embodiment
It is tested after preparing corresponding testing standard sample, the results are shown in table below：
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | |
| Tensile strength（MPa） | 16.3 | 13.5 | 14.1 | 6.9 |
| Elongation at break（%） | 423 | 399 | 386 | 152 |
| Cold aging post-tensioning intensity（MPa） | 15.8 | 14.6 | 16.9 | 2.1 |
| Elongation at break after cold aging（%） | 415 | 391 | 399 | 38 |
| Acid corrosion post-tensioning intensity（MPa） | 15.8 | 13.2 | 13.5 | 4.2 |
| Elongation at break after acid corrosion（%） | 412 | 388 | 410 | 112 |
As it can be seen that after the present invention is improved lip-type packing, it is close in addition to lean on crimp to realize under room temperature compared to O shapes circle
Envelope is outer, it is necessary to and to overcome low-temperature deformation to be influenced caused by sealing by the compensation of spring force at low ambient temperatures, and this hair
Bright lip-type packing resistance to cold is good, corrosion resistance and good, and elasticity is good, can greatly extend the service life of valve.
It should be noted that the foregoing is merely the preferred specific embodiment of the present invention,
If conception under this invention changes, the function generated, when the spirit still covered without departing from specification,
It should within the scope of the invention.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiments or example in can be combined in any suitable manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of being detached from the principle of the present invention and objective a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The range of invention is limited by claim and its equivalent.
Claims (3)
1. a kind of cryogenic valve comprising：
Valve body, lip-shaped ring, valve seat bearing, snap ring, spring base, butterfly spring, sealing ring, sphere.
2. modified cryogenic valve described in claim 1, it is characterised in that；
Lip-shaped ring has good resistance to cold.
3. the modification cryogenic valve described in claim 2, it is characterised in that；
The preparation method of the lip-shaped ring is as follows：
（1）The purple ball algae of fermentation：
（2）Drying and calcining：
（3）Configure raw material：
According to weight fraction, 100 parts of fluorubber, 3 parts of the diatomite that 8. 5 μm of grain size, 1-2 parts of white carbon, purple ball algae calcining powder
It is 0.5-1.2 parts last, 4 parts of magnesia, 0.8 part of calcium hydroxide, 2 parts of cumyl peroxide；
（4）It is uniformly kneaded using open mill by formula, Bao Tong, bottom sheet, is stored at room temperature 24 h;
Vulcanizing press vulcanizes, and one section and two sections of compression molding conditions are respectively 125 DEG C × 30min and 200 DEG C ×
60min；
（5）Shape is polished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810231047.7A CN108591511A (en) | 2018-03-20 | 2018-03-20 | A kind of cryogenic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810231047.7A CN108591511A (en) | 2018-03-20 | 2018-03-20 | A kind of cryogenic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108591511A true CN108591511A (en) | 2018-09-28 |
Family
ID=63626915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810231047.7A Pending CN108591511A (en) | 2018-03-20 | 2018-03-20 | A kind of cryogenic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108591511A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003113948A (en) * | 2001-10-01 | 2003-04-18 | Yamatake Corp | Ball valve |
| US20140306140A1 (en) * | 2013-04-16 | 2014-10-16 | David A. Buck | Valve With Stop Mechanism |
| CN104403238A (en) * | 2014-11-25 | 2015-03-11 | 大连郑氏橡胶有限公司 | Low-temperature resistant modified fluoro-rubber mixed compound and preparation method |
| CN105237825A (en) * | 2015-11-11 | 2016-01-13 | 鲁一军 | Rubber for manufacturing sealing ring |
| CN105782484A (en) * | 2016-04-19 | 2016-07-20 | 潘明尧 | LNG ultralow-temperature top installing type ball valve |
| CN106117082A (en) * | 2016-06-28 | 2016-11-16 | 中国科学技术大学 | A kind of method that high selectivity prepares acetonitrile |
-
2018
- 2018-03-20 CN CN201810231047.7A patent/CN108591511A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003113948A (en) * | 2001-10-01 | 2003-04-18 | Yamatake Corp | Ball valve |
| US20140306140A1 (en) * | 2013-04-16 | 2014-10-16 | David A. Buck | Valve With Stop Mechanism |
| CN104403238A (en) * | 2014-11-25 | 2015-03-11 | 大连郑氏橡胶有限公司 | Low-temperature resistant modified fluoro-rubber mixed compound and preparation method |
| CN105237825A (en) * | 2015-11-11 | 2016-01-13 | 鲁一军 | Rubber for manufacturing sealing ring |
| CN105782484A (en) * | 2016-04-19 | 2016-07-20 | 潘明尧 | LNG ultralow-temperature top installing type ball valve |
| CN106117082A (en) * | 2016-06-28 | 2016-11-16 | 中国科学技术大学 | A kind of method that high selectivity prepares acetonitrile |
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Application publication date: 20180928 |
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