CN112709744A - Seal structure of screw hole under low temperature, high pressure liquefied gas environment - Google Patents
Seal structure of screw hole under low temperature, high pressure liquefied gas environment Download PDFInfo
- Publication number
- CN112709744A CN112709744A CN202110042432.9A CN202110042432A CN112709744A CN 112709744 A CN112709744 A CN 112709744A CN 202110042432 A CN202110042432 A CN 202110042432A CN 112709744 A CN112709744 A CN 112709744A
- Authority
- CN
- China
- Prior art keywords
- threaded hole
- threaded
- hole
- section
- threaded rod
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 41
- 229920001973 fluoroelastomer Polymers 0.000 claims description 4
- 239000004809 Teflon Substances 0.000 claims 1
- 229920006362 Teflon® Polymers 0.000 claims 1
- 239000007789 gas Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- -1 polytetrafluoroethylene Polymers 0.000 description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 244000025254 Cannabis sativa Species 0.000 description 3
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 3
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 3
- 235000009120 camo Nutrition 0.000 description 3
- 235000005607 chanvre indien Nutrition 0.000 description 3
- 239000011487 hemp Substances 0.000 description 3
- 239000003949 liquefied natural gas Substances 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/102—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by material
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a sealing structure of a threaded hole in a low-temperature and high-pressure liquefied gas environment, which comprises: the screw rod, more than one second O-shaped ring and more than one gasket; the screw rod is integrally formed by more than two threaded rod sections with different outer diameters and a circular truncated cone section and a cylindrical section between every two adjacent threaded rod sections; two adjacent threaded rod sections are respectively a primary threaded rod section and a secondary threaded rod section, the small-diameter end of the circular truncated cone section is intersected with the primary threaded rod section, and a third step surface is arranged at the intersection; a fourth step surface is arranged at the intersection of the cylindrical section and the secondary threaded rod section; more than one second O-shaped ring is arranged on the cylindrical section of the screw rod; gaskets are arranged on the step surfaces between two adjacent threaded rod sections; the invention can adapt to low-temperature and high-pressure liquefied gas environment and is convenient to disassemble and maintain.
Description
Technical Field
The invention belongs to the technical field of research and development and application of low-temperature and high-pressure equipment, and particularly relates to a sealing structure of a threaded hole in a low-temperature and high-pressure liquefied gas environment.
Background
The low-temperature high-pressure liquefied gas is gas with the temperature below 120K and the pressure not less than 1 MPa. Gases in the form of liquefied gases include Liquefied Natural Gas (LNG), liquid oxygen, liquid nitrogen, liquid hydrogen, liquid helium, and the like.
The sealing of threaded holes in low temperature, high pressure liquefied gas environments has been a major problem in the industry, and failure of sealing elements is a major cause of leakage. Like the production of LNG, liquid hydrogen, screw hole sealing failure not only can bring the waste of the energy in the transportation, can produce huge potential safety hazard moreover.
The existing thread sealing modes mainly comprise four modes:
firstly, a sealing effect is achieved by winding a thin hemp rope or spraying lead oil on threads, which is the most traditional mode; secondly, winding threads by using a polytetrafluoroethylene raw material belt, which is one of the most common modes at present; thirdly, coating the thread with sealant (le tai 243, GD414, etc.), and sealing after the sealant is dried; welding and sealing, and directly welding the bolt and the threaded connecting piece to play a role in sealing after the bolt is screwed down.
However, the existing thread sealing mode has the defects under the environment of low-temperature and high-pressure liquefied gas:
winding a thin hemp rope or spraying lead oil on the threads. The disadvantages of the mode are that the hemp and thick paint is easy to embrittle and lose efficacy in low-temperature environment, is not high-pressure resistant and has short service life.
And secondly, winding threads by using a polytetrafluoroethylene raw material belt. The method has good economy, simple operation and convenient construction, but the pressure resistance of the method is not more than 10MPa, the sealing effect at low temperature is poor, and the disassembly is difficult.
Thirdly, coating the sealing glue (le tai 243, GD414, etc.) on the thread for sealing. The method has extremely high requirement on the sealant, poor economy, short service life and difficult disassembly.
And fourthly, mechanical sealing. This method can be used without disassembly, but is not applicable in most cases.
Disclosure of Invention
In view of this, the invention provides a sealing structure of a threaded hole in a low-temperature and high-pressure liquefied gas environment, which can adapt to the low-temperature and high-pressure liquefied gas environment (the temperature is above 20K, and the pressure is below 70 MPa), and can be conveniently detached and maintained.
The invention is realized by the following technical scheme:
a seal structure of a threaded hole in a low-temperature and high-pressure liquefied gas environment is characterized in that the threaded hole is integrally formed by more than two threaded hole sections with different inner diameters and a circular truncated cone hole and a cylindrical hole between every two adjacent threaded hole sections, the two adjacent threaded hole sections are respectively a primary threaded hole and a secondary threaded hole, the inner diameter of the primary threaded hole is smaller than that of the secondary threaded hole, the small-diameter end of the circular truncated cone hole is intersected with the primary threaded hole, and a first step surface is arranged at the intersection; a second step surface is arranged at the intersection of the cylindrical hole and the secondary threaded hole;
the seal structure includes: the screw rod, more than one second O-shaped ring and more than one gasket;
the screw rod is integrally formed by more than two threaded rod sections with different outer diameters and a circular truncated cone section and a cylindrical section between every two adjacent threaded rod sections; the number of the threaded rod sections is equal to that of the threaded hole sections; two adjacent threaded rod sections are respectively a primary threaded rod section and a secondary threaded rod section, the outer diameter of the primary threaded rod section is smaller than that of the secondary threaded rod section, the small-diameter end of the circular truncated cone section is intersected with the primary threaded rod section, and a third step surface is arranged at the intersection; a fourth step surface is arranged at the intersection of the cylindrical section and the secondary threaded rod section;
the overall connection relationship is as follows: taking the connection between two adjacent threaded rod sections of the threaded rod and two adjacent threaded hole sections of the threaded hole as an example:
more than one second O-shaped ring is arranged on the cylindrical section of the screw rod; gaskets are arranged on the step surfaces between two adjacent threaded rod sections, and the number of the gaskets is equal to that of the threaded rod sections; a gasket at the third step surface between two adjacent threaded rod sections is a first gasket, and a gasket at the fourth step surface is a second gasket;
when a screw rod provided with a second O-shaped ring and a gasket is matched with the threaded hole, the primary threaded rod section of the screw rod is in threaded fit with the primary threaded hole of the threaded hole, the secondary threaded rod section of the screw rod is in threaded fit with the secondary threaded hole of the threaded hole, and the cylindrical section of the screw rod is matched with the cylindrical hole of the threaded hole; the circular truncated cone section of the screw rod is tightly attached to the circular truncated cone hole of the threaded hole to form conical surface sealing; the first gasket is tightly pressed between the first step surface of the threaded hole and the third step surface of the screw rod, and the second gasket is tightly pressed between the second step surface of the threaded hole and the fourth step surface of the screw rod to form axial seal; the second O-shaped ring is tightly attached to the cylindrical hole of the threaded hole to form radial sealing.
Further, still include first O type circle, first O type circle is installed on the outer periphery of the big footpath end of the round platform section of screw rod, and first O type circle with the round platform hole of screw hole closely laminates, forms radial seal.
Furthermore, the included angle between the generatrix of the circular truncated cone hole and the axis thereof is b; and the value range of b is 30-60 degrees;
the included angle between the generatrix of the circular table section and the axis thereof is a, the value range of a is 30-60 degrees, and the difference between a and b is not more than 1 degree.
Furthermore, the first O-shaped ring and the second O-shaped ring are made of fluororubber.
Furthermore, the thickness of the gasket is 2-3 mm, and the thickness error is not more than 0.1 mm.
Furthermore, the gasket is made of polytetrafluoroethylene.
Has the advantages that: the five-stage step-by-step sealing structure can adapt to low-temperature and high-pressure liquefied gas environments (the temperature is above 20K, and the pressure is below 70 MPa), and is convenient to disassemble and maintain; meanwhile, the sealing effect, the service life of the equipment and the safety of low-temperature and high-pressure equipment are improved; the manufacturing difficulty is moderate, the manufacturing cost is controllable, and the method has application prospect.
Drawings
FIG. 1 is a structural diagram of the present embodiment 1;
FIG. 2 is a structural diagram of this embodiment 2;
the sealing structure comprises a sealing ring, a first O-shaped ring, a second O-shaped ring, a first gasket, a second gasket, a screw rod, a first-level threaded rod section, a second-level threaded rod section, a circular truncated cone section and a circular truncated cone hole, wherein the sealing ring comprises 1-the first O-shaped ring, 2-the second O-shaped ring, 3-the first gasket, 4-the second gasket, 5-the screw rod, 6-the first-level.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
Example 1:
the embodiment provides a sealing structure of a threaded hole in a low-temperature and high-pressure liquefied gas environment, and referring to fig. 1, the threaded hole of the embodiment is a two-stage threaded hole, the two-stage threaded hole is integrally formed by a first-stage threaded hole, a circular truncated cone hole 9, a cylindrical hole and a second-stage threaded hole in sequence, the inner diameter of the first-stage threaded hole is smaller than that of the second-stage threaded hole, the small-diameter end of the circular truncated cone hole 9 is intersected with the first-stage threaded hole, and a first step surface; a second step surface is arranged at the intersection of the cylindrical hole and the secondary threaded hole; the included angle between the generatrix of the circular table hole 9 and the axis thereof is b; and the value range of b is 30-60 degrees;
the seal structure includes: the device comprises a first O-shaped ring 1, a second O-shaped ring 2, a first gasket 3, a second gasket 4 and a screw rod 5;
the screw 5 is a two-stage threaded bolt and is integrally formed by a first-stage threaded rod section 6, a circular truncated cone section 8, a cylindrical section and a second-stage threaded rod section 7 in sequence, the outer diameter of the first-stage threaded rod section 6 is smaller than that of the second-stage threaded rod section 7, the small-diameter end of the circular truncated cone section 8 is intersected with the first-stage threaded rod section 6, and a third step surface is arranged at the intersection; a fourth step surface is arranged at the intersection of the cylindrical section and the secondary threaded rod section 7; the outer circumferential surface of the large-diameter end of the circular table section 8 is provided with a first annular groove, and the outer circumferential surface of the cylindrical section is provided with a second annular groove; the included angle between the generatrix of the circular table section 8 and the axis thereof is a, the value range of a is 30-60 degrees, and the difference between a and b is not more than 1 degree; the pitch errors of the first-stage threaded rod section 6 and the second-stage threaded rod section 7 are controlled within 0.1 mm;
the first O-shaped ring 1 and the second O-shaped ring 2 are made of fluororubber;
the thicknesses of the first gasket 3 and the second gasket 4 are both 2-3 mm, and the thickness error is not more than 0.1 mm; the materials are all made of polytetrafluoroethylene with the same material;
the overall connection relationship is as follows: the first O-shaped ring 1 is arranged in a first annular groove of the screw rod 5, and the second O-shaped ring 2 is arranged in a second annular groove of the screw rod 5; the first gasket 3 is sleeved on a third step surface of the screw rod 5, and the second gasket 4 is sleeved on a fourth step surface of the screw rod 5;
when a screw rod 5 provided with a first O-shaped ring 1, a second O-shaped ring 2, a first gasket 3 and a second gasket 4 is matched with the threaded hole, a first-stage threaded rod section 6 of the screw rod 5 is in threaded fit with a first-stage threaded hole of the threaded hole, a second-stage threaded rod section 7 of the screw rod is in threaded fit with a second-stage threaded hole of the threaded hole, and a cylindrical section of the screw rod 5 is matched with a cylindrical hole of the threaded hole; the circular truncated cone section 8 of the screw rod 5 is tightly attached to the circular truncated cone hole 9 of the threaded hole to form conical surface sealing; the first gasket 3 is tightly pressed between the first step surface of the threaded hole and the third step surface of the screw rod 5, and the second gasket 4 is tightly pressed between the second step surface of the threaded hole and the fourth step surface of the screw rod 5, so that two axial seals are formed; the first O-shaped ring 1 is tightly attached to the circular truncated cone hole 9 of the threaded hole, and the second O-shaped ring 2 is tightly attached to the cylindrical hole of the threaded hole to form two radial seals; therefore, the bolt sealing structure of the present embodiment is a five-stage sealing structure with double threaded holes.
The working principle is as follows: when in low temperature, high pressure liquefied gas environment, the axial seal of first gasket 3 department at first plays main sealing effect, and after first gasket 3 damaged, then the sealed main sealing effect that begins of the conical surface of the round platform hole 9 of the round platform section 8 of screw rod 5 and screw hole, when the sealed back that damages of conical surface, then the radial seal of first O type circle 1 department begins to play main sealing effect, after first O type circle 1 damaged, the axial seal of second O type circle 2 department begins to play main sealing effect, after second O type circle 2 damaged, the axial seal of second gasket 4 department begins to play main sealing effect, until second gasket 4 destroyed, the condition that can not appear leaking gas after five-stage seal all destroyed promptly.
The threaded hole of the embodiment is not limited to a two-stage threaded hole, the corresponding screw 5 is not limited to a two-stage threaded bolt, and the threaded bolt can be applied to more than two stages of threaded holes by increasing the threaded rod section of the screw 5;
the number of the second O-rings 2 in this embodiment is not limited to one, and the number of the second O-rings may be increased according to the length of the cylindrical hole of the threaded hole, and the materials of the first O-ring 1 and the second O-ring 2 are not limited to fluororubber, and may be selected from other materials according to the working conditions;
the number of the first gasket 3 and the second gasket 4 of this embodiment is not limited to one, and can be according to the progression of the threaded hole is increased, and the material of the number of the first gasket 3 and the second gasket 4 is not limited to polytetrafluoroethylene, and other materials can be selected for use according to the working condition.
Example 2:
in this embodiment, on the basis of embodiment 1, referring to fig. 2, a first annular groove and a first O-ring 1 which are arranged on the outer circumferential surface of the large-diameter end of the circular table section 8 are omitted, so as to form a four-stage sealing structure of the threaded hole; the processing manufacturing difficulty and the manufacturing cost of this embodiment all can be low, but have reduced one-level seal structure, and factor of safety reduces, can adopt this kind of structure to low pressure, the higher equipment of temperature.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A seal structure of a threaded hole in a low-temperature and high-pressure liquefied gas environment is characterized in that the threaded hole is integrally formed by more than two threaded hole sections with different inner diameters and a circular truncated cone hole (9) and a cylindrical hole between every two adjacent threaded hole sections, the two adjacent threaded hole sections are respectively a primary threaded hole and a secondary threaded hole, the inner diameter of the primary threaded hole is smaller than that of the secondary threaded hole, the small-diameter end of the circular truncated cone hole (9) is intersected with the primary threaded hole, and a first step surface is arranged at the intersection; a second step surface is arranged at the intersection of the cylindrical hole and the secondary threaded hole;
characterized in that, the seal structure includes: the screw rod (5), more than one second O-shaped ring (2) and more than one gasket;
the screw (5) is integrally formed by more than two threaded rod sections with different outer diameters and a circular truncated cone section (8) and a cylindrical section between every two adjacent threaded rod sections; the number of the threaded rod sections is equal to that of the threaded hole sections; two adjacent threaded rod sections are respectively a primary threaded rod section (6) and a secondary threaded rod section (7), the outer diameter of the primary threaded rod section (6) is smaller than that of the secondary threaded rod section (7), the small-diameter end of the circular platform section (8) is intersected with the primary threaded rod section (6), and a third step surface is arranged at the intersection; a fourth step surface is arranged at the intersection of the cylindrical section and the secondary threaded rod section (7);
the overall connection relationship is as follows: taking the connection between two adjacent threaded rod sections of the threaded rod (5) and two adjacent threaded hole sections of the threaded hole as an example:
more than one second O-shaped ring (2) is arranged on the cylindrical section of the screw rod (5); gaskets are arranged on the step surfaces between two adjacent threaded rod sections, and the number of the gaskets is equal to that of the threaded rod sections; a gasket at the third step surface between two adjacent threaded rod sections is a first gasket (3), and a gasket at the fourth step surface is a second gasket (4);
when a screw rod (5) provided with a second O-shaped ring (2) and a gasket is matched with the threaded hole, a primary threaded rod section (6) of the screw rod (5) is in threaded fit with the primary threaded hole of the threaded hole, a secondary threaded rod section (7) of the screw rod is in threaded fit with the secondary threaded hole of the threaded hole, and a cylindrical section of the screw rod (5) is matched with a cylindrical hole of the threaded hole; the round table section (8) of the screw rod (5) is tightly attached to the round table hole (9) of the threaded hole to form conical surface sealing; the first gasket (3) is tightly pressed between a first step surface of the threaded hole and a third step surface of the screw rod (5), and the second gasket (4) is tightly pressed between a second step surface of the threaded hole and a fourth step surface of the screw rod (5) to form axial sealing; the second O-shaped ring (2) is tightly attached to the cylindrical hole of the threaded hole to form radial sealing.
2. The sealing structure of the threaded hole in the low-temperature and high-pressure liquefied gas environment according to claim 1, further comprising a first O-ring (1), wherein the first O-ring (1) is installed on the outer circumferential surface of the large-diameter end of the circular truncated cone section (8) of the screw rod (5), and the first O-ring (1) is tightly attached to the circular truncated cone hole (9) of the threaded hole to form a radial seal.
3. The sealing structure of the threaded hole in the environment of low-temperature and high-pressure liquefied gas according to claim 1, wherein the included angle between the generatrix of the circular truncated cone hole (9) and the axis thereof is b; and the value range of b is 30-60 degrees;
the included angle between the generatrix of the circular table section (8) and the axis thereof is a, the value range of a is 30-60 degrees, and the difference between a and b is not more than 1 degree.
4. The sealing structure of the threaded hole in the low-temperature and high-pressure liquefied gas environment according to claim 2, wherein the first O-ring (1) and the second O-ring (2) are made of fluororubber.
5. The sealing structure for the threaded hole in the low-temperature and high-pressure liquefied gas environment according to claim 1, wherein the thickness of the gasket is 2-3 mm, and the thickness error is not more than 0.1 mm.
6. The sealing structure for threaded holes in a cryogenic, high-pressure liquefied gas environment according to claim 1, wherein said gasket is made of teflon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110042432.9A CN112709744A (en) | 2021-01-13 | 2021-01-13 | Seal structure of screw hole under low temperature, high pressure liquefied gas environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110042432.9A CN112709744A (en) | 2021-01-13 | 2021-01-13 | Seal structure of screw hole under low temperature, high pressure liquefied gas environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112709744A true CN112709744A (en) | 2021-04-27 |
Family
ID=75548953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110042432.9A Pending CN112709744A (en) | 2021-01-13 | 2021-01-13 | Seal structure of screw hole under low temperature, high pressure liquefied gas environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112709744A (en) |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1419721A (en) * | 1973-02-12 | 1975-12-31 | Brev Et Detuces Soc Ind De | Adjusting devices in carburettors for internal combustion engines |
| DE4343111C1 (en) * | 1993-12-17 | 1995-02-02 | Daimler Benz Ag | Bolt-head or nut gasket made of plastic for the prevention of contact corrosion in the case of metallic workpieces |
| US20040208725A1 (en) * | 2001-08-24 | 2004-10-21 | Antonius Bader | Device with a screw plug and a range of devices |
| US20080273941A1 (en) * | 2005-07-11 | 2008-11-06 | Van Cor Dale E | Threaded fastener and fastener system |
| DE102008039701A1 (en) * | 2008-08-26 | 2010-03-04 | Klaus Heinrichs | O-ring for use in insert i.e. connection screw, to seal conically chamfered threaded bore of hydraulically or pneumatically operated machine, has straight section forming angle of specific range with respect to axial direction of ring |
| CN202391353U (en) * | 2011-12-16 | 2012-08-22 | 贵州高峰石油机械股份有限公司 | Non-collar connection thread for petroleum oil pipe and casing |
| CN202834049U (en) * | 2012-09-03 | 2013-03-27 | 圣邦集团有限公司 | Auxiliary hole sealing structure |
| JP2013087830A (en) * | 2011-10-17 | 2013-05-13 | Nok Corp | Gasket for tightening part of screw member |
| CN105507824A (en) * | 2016-02-05 | 2016-04-20 | 上海尊优自动化设备有限公司 | Air-sealed threaded structure used in downhole tool and downhole tool |
| CN207756907U (en) * | 2017-11-18 | 2018-08-24 | 青岛正望钢水控制股份有限公司 | A kind of high temperature sealing joint device |
| CN108468699A (en) * | 2018-05-09 | 2018-08-31 | 河南森源电气股份有限公司 | A kind of sealing screw component and its attachment screw |
| CN108625797A (en) * | 2017-03-21 | 2018-10-09 | 上海海隆石油钻具有限公司 | A kind of hermetic sealing drill pipe joint preventing reversion shackle |
| CN109140070A (en) * | 2018-09-21 | 2019-01-04 | 孙伟 | It is a kind of applied to high pressure, the hydraulic pipeline joint of high-frequency vibration environment |
| CN208858734U (en) * | 2018-08-17 | 2019-05-14 | 昆山艺可五金有限公司 | A kind of interior six point cylindrical head bolt |
| CN110274735A (en) * | 2019-07-03 | 2019-09-24 | 清华大学 | A kind of adjustable static seal experimental apparatus for testing of multi-stage compression rate |
| CN210859795U (en) * | 2019-11-25 | 2020-06-26 | 无锡必克液压股份有限公司 | Split overflow valve hole plug sealed by conical surface |
| CN214698708U (en) * | 2021-01-13 | 2021-11-12 | 北京航天试验技术研究所 | Seal structure of screw hole under low temperature, high pressure liquefied gas environment |
-
2021
- 2021-01-13 CN CN202110042432.9A patent/CN112709744A/en active Pending
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1419721A (en) * | 1973-02-12 | 1975-12-31 | Brev Et Detuces Soc Ind De | Adjusting devices in carburettors for internal combustion engines |
| DE4343111C1 (en) * | 1993-12-17 | 1995-02-02 | Daimler Benz Ag | Bolt-head or nut gasket made of plastic for the prevention of contact corrosion in the case of metallic workpieces |
| US20040208725A1 (en) * | 2001-08-24 | 2004-10-21 | Antonius Bader | Device with a screw plug and a range of devices |
| US20080273941A1 (en) * | 2005-07-11 | 2008-11-06 | Van Cor Dale E | Threaded fastener and fastener system |
| DE102008039701A1 (en) * | 2008-08-26 | 2010-03-04 | Klaus Heinrichs | O-ring for use in insert i.e. connection screw, to seal conically chamfered threaded bore of hydraulically or pneumatically operated machine, has straight section forming angle of specific range with respect to axial direction of ring |
| JP2013087830A (en) * | 2011-10-17 | 2013-05-13 | Nok Corp | Gasket for tightening part of screw member |
| CN202391353U (en) * | 2011-12-16 | 2012-08-22 | 贵州高峰石油机械股份有限公司 | Non-collar connection thread for petroleum oil pipe and casing |
| CN202834049U (en) * | 2012-09-03 | 2013-03-27 | 圣邦集团有限公司 | Auxiliary hole sealing structure |
| CN105507824A (en) * | 2016-02-05 | 2016-04-20 | 上海尊优自动化设备有限公司 | Air-sealed threaded structure used in downhole tool and downhole tool |
| CN108625797A (en) * | 2017-03-21 | 2018-10-09 | 上海海隆石油钻具有限公司 | A kind of hermetic sealing drill pipe joint preventing reversion shackle |
| CN207756907U (en) * | 2017-11-18 | 2018-08-24 | 青岛正望钢水控制股份有限公司 | A kind of high temperature sealing joint device |
| CN108468699A (en) * | 2018-05-09 | 2018-08-31 | 河南森源电气股份有限公司 | A kind of sealing screw component and its attachment screw |
| CN208858734U (en) * | 2018-08-17 | 2019-05-14 | 昆山艺可五金有限公司 | A kind of interior six point cylindrical head bolt |
| CN109140070A (en) * | 2018-09-21 | 2019-01-04 | 孙伟 | It is a kind of applied to high pressure, the hydraulic pipeline joint of high-frequency vibration environment |
| CN110274735A (en) * | 2019-07-03 | 2019-09-24 | 清华大学 | A kind of adjustable static seal experimental apparatus for testing of multi-stage compression rate |
| CN210859795U (en) * | 2019-11-25 | 2020-06-26 | 无锡必克液压股份有限公司 | Split overflow valve hole plug sealed by conical surface |
| CN214698708U (en) * | 2021-01-13 | 2021-11-12 | 北京航天试验技术研究所 | Seal structure of screw hole under low temperature, high pressure liquefied gas environment |
Non-Patent Citations (3)
| Title |
|---|
| TAO LI: "Solid expandable tubular patching technique for high-temperature and high-pressure casing damaged wells", vol. 42, no. 3, 31 December 2015 (2015-12-31) * |
| 侯祖刚;邢兰朝;王增友;: "一种高压容器的螺纹孔密封结构设计", 液压气动与密封, no. 12, 15 December 2014 (2014-12-15) * |
| 马艳琳;李天雷;张智;许红林;: "特殊螺纹气密封性能评价研究", 石油管材与仪器, no. 04, 15 August 2016 (2016-08-15) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2565500B1 (en) | Bidirectional pressure self balancing stop valve | |
| CN214698708U (en) | Seal structure of screw hole under low temperature, high pressure liquefied gas environment | |
| US4192519A (en) | High pressure multi-purpose seal | |
| CN203463833U (en) | Sealing assembly for butt-joint of high-temperature high-pressure gas pipelines | |
| JP2018527534A5 (en) | ||
| CN112178446B (en) | Jacket type high-pressure hydrogen storage device for hydrogenation station | |
| US20100148447A1 (en) | Bi-directional wellhead seal | |
| CN104089044A (en) | LNG ultra-low temperature top-mounting type ball valve seat capable of achieving pre-tightening force fine tuning and on-line disassembling | |
| CN203979698U (en) | A kind of pipe coupling | |
| CN206496122U (en) | A kind of chicksan | |
| CN107701834B (en) | A kind of sealing force adjustable water lower flange | |
| CN112709744A (en) | Seal structure of screw hole under low temperature, high pressure liquefied gas environment | |
| KR20140007240A (en) | Seal structure of high-pressure gas vessel | |
| CN216243533U (en) | Long-life highly reliable gas cylinder structure | |
| US20160377208A1 (en) | Gasket for Threaded Pipe Flange | |
| CN202017836U (en) | Stainless steel hard-seal pipe connector | |
| CN201925631U (en) | Stainless steel hard-seal pipe connector | |
| CN219062473U (en) | Top-mounted split ultralow-temperature four-eccentric metal sealing butterfly valve | |
| CN209960041U (en) | Shock-proof anti-loose butt-joint pipe joint device | |
| CN102116397A (en) | Stainless steel hard-seal pipe joint | |
| US20230400113A1 (en) | Internally-sealed one-piece external thread ball valve | |
| CA2430421C (en) | Refrigeration modulating valve sealing device | |
| CN102678919A (en) | Pressure container | |
| US5338004A (en) | Valve seal apparatus | |
| CN214425325U (en) | Oil and natural gas conveying pipeline connecting structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |