CN115163951A - Assembly self-adaptation sphere flange joint structure - Google Patents
Assembly self-adaptation sphere flange joint structure Download PDFInfo
- Publication number
- CN115163951A CN115163951A CN202210770584.5A CN202210770584A CN115163951A CN 115163951 A CN115163951 A CN 115163951A CN 202210770584 A CN202210770584 A CN 202210770584A CN 115163951 A CN115163951 A CN 115163951A
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- Prior art keywords
- spherical
- flange
- spherical flange
- concave
- concave spherical
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 61
- 230000003044 adaptive effect Effects 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910002804 graphite Inorganic materials 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003380 propellant 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/02—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction
- F16L27/04—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces
- F16L27/053—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces held in place by bolts passing through flanges
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/02—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction
- F16L27/04—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces
- F16L27/06—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces with special sealing means between the engaging surfaces
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention relates to an assembly self-adaptive spherical flange connecting structure, which comprises: the sealing device comprises a concave spherical flange, a sealing element, a convex spherical flange, a movable sleeve ring, a spherical screw and a fastener; through holes with uniformly distributed circumference are processed on the concave spherical flange and the movable sleeve ring; the spherical screw sequentially passes through the through holes on the movable sleeve ring and the concave spherical flange to be fixedly connected with the fastener; a convex spherical flange is arranged between the concave spherical flange and the loop ring, the convex spherical flange is matched with the concave spherical flange through a spherical surface, and the convex spherical flange is in surface contact with the loop ring; the concave spherical flange is not contacted with the loop ring; the spherical screw is matched with the loop ring through a spherical surface; a concave spherical surface is processed on one side of the concave spherical flange, which faces the convex spherical flange, and an annular groove is processed on the inner wall of the concave spherical surface; the sealing element is of an annular structure and is arranged in the annular groove to play a role in sealing. The invention has angle compensation capability in all directions and can be repeatedly disassembled and assembled.
Description
Technical Field
The invention belongs to the technical field of flange connection structures, and particularly relates to an assembly self-adaptive spherical flange connection structure.
Background
For a new generation of high-thrust carrier rocket, the final assembly layout space is short, the caliber of a propellant conveying pipe is large, and the condition of inconsistent assembly is easy to occur in the assembly process, so that the final assembly progress is slow and even the product can be damaged.
At present, the planar flange is more applied domestically, and the flange has the advantages of simple structure and low processing difficulty. The installation angle deviation often appears because reasons such as product production deviation, the accumulative error of assembly, etc. in the carrier rocket assembly process, and the condition that the local stress of product concentrates can appear because the plane flange structure does not possess angle compensation's ability, under the complicated mechanical environment condition in the rocket flight process, the product probably appears structural failure. In view of the above problem, it is necessary to develop a flange connection structure with a certain angle compensation capability, in which the sealing element cannot generate surplus material and can be applied to the assembly of a pipeline with a larger diameter.
Disclosure of Invention
The invention solves the technical problems that: the defects of the prior art are overcome, the self-adaptive spherical flange connection structure is provided, and the problem that local stress concentration occurs to the connection flange when deviation exists in large-caliber pipeline installation is solved.
The technical solution of the invention is as follows:
an assembly adaptive spherical flange connection structure comprising: the sealing device comprises a concave spherical flange, a sealing element, a convex spherical flange, a movable sleeve ring, a spherical screw and a fastener;
through holes with uniformly distributed circumference are processed on the concave spherical flange and the movable sleeve ring; the spherical screw sequentially passes through the through holes on the movable sleeve ring and the concave spherical flange to be fixedly connected with the fastener;
a convex spherical flange is arranged between the concave spherical flange and the loop ring, the convex spherical flange is matched with the concave spherical flange through a spherical surface, and the convex spherical flange is in surface contact with the loop ring; the concave spherical flange is not contacted with the loop ring;
the spherical screw is matched with the loop ring through a spherical surface;
a concave spherical surface is processed on one side of the concave spherical flange, which faces the convex spherical flange, and an annular groove is processed on the inner wall of the concave spherical surface;
the sealing element is of an annular structure and is arranged in the annular groove to play a role in sealing.
Preferably: the section of the annular groove is triangular.
Preferably: the section of the sealing element is a right-angle-like triangle, and the hypotenuse of the right-angle-like triangle is an arc line protruding outwards.
Preferably: the right-angle side of the sealing element section right-angle triangle, which is vertical to the axis of the concave spherical flange, is used as a first bottom side, and the right-angle side of the concave spherical flange annular groove section triangle, which is vertical to the axis of the concave spherical flange, is used as a second bottom side;
the length of the first bottom edge is smaller than that of the second bottom edge.
Preferably: the length of the second bottom edge is 1.03 times to 1.05 times of the length of the first bottom edge.
Preferably: the sealing element material is graphite.
Preferably: and carrying out silver edge covering treatment on the edges where the three vertexes of the right-angled triangle in the section of the sealing element and the plane where the first bottom edge is located.
Preferably: the spherical screw comprises a polished rod section and a convex spherical surface matching section;
the through holes uniformly distributed on the periphery of the movable sleeve ring comprise a smooth hole section and a concave spherical hole section;
the convex spherical surface matching section is matched with the concave spherical surface hole section through a spherical surface.
Preferably: the inner diameter of the looper unthreaded hole section is larger than the outer diameter of the spherical screw unthreaded rod section.
Preferably: the inner diameter of the looper smooth hole section is 1.2 to 1.5 times larger than the outer diameter of the spherical screw smooth rod section.
Compared with the prior art, the invention has the advantages that:
the assembly self-adaptive spherical flange connecting structure has angle compensation capability in all directions and repeated disassembly and assembly capability, can be applied to the temperature range from 77K to normal temperature, and has the sealing leakage rate under the sealing pressure of 0.6MPa superior to 1 multiplied by 10 -7 Pa.m 3 /s。
Drawings
FIG. 1 is a schematic view of an assembled adaptive spherical flange connection structure according to the present invention;
FIG. 2 is a view of the spherical screw structure of the present invention;
FIG. 3 is a view of the seal configuration of the present invention;
FIG. 4 is a schematic view of a sealing structure of the graphite assembly of the present invention;
FIG. 5 is a view of the structure of the looper ring of the present invention;
fig. 6 is a view showing the structure of the convex spherical flange according to the present invention.
Wherein, 1-concave spherical flange 2-sealing element 3-convex spherical flange 4-movable lantern ring 5-spherical screw 6-fastener
Detailed Description
The assembly self-adaptive spherical flange connecting structure of the invention is shown in figure 1 and comprises: concave spherical flange 1, sealing member 2, convex spherical flange 3, looper 4, spherical screw 5 and fastener 6. Through holes are uniformly distributed on the periphery of the concave spherical flange 1 and the loop ring 4; the structure of the movable sleeve ring 4 is shown in figure 5. The spherical screw 5 sequentially passes through the movable sleeve ring 4 and the through hole on the concave spherical flange 1 to be fixedly connected with the fastener 6; a convex spherical flange 3 is arranged between the concave spherical flange 1 and the loop ring 4, the convex spherical flange 3 is matched with the concave spherical flange 1 through a spherical surface, and the convex spherical flange 3 is in surface contact with the loop ring 4; the concave spherical flange 1 and the loop ring 4 are not contacted; the spherical screw 5 is matched with the loop ring 4 through a spherical surface; a concave spherical surface is processed on one side of the concave spherical flange 1 facing the convex spherical flange 3, and an annular groove is processed on the inner wall of the concave spherical surface; the sealing element 2 is of an annular structure, and the sealing element 2 is arranged in the annular groove to play a role in sealing.
The section of the annular groove is triangular. The section of the sealing element 2 is a right-angle-like triangle, the hypotenuse of the right-angle-like triangle is an outwardly protruding arc line, the arc line serves as the outer edge, and the radius R of the outer edge is 15mm, as shown in fig. 3. The sealing element 2 is extruded, and the cambered surface where the outer edge is located is contacted with the convex spherical flange 3 to form sealing.
The right-angle side of the cross section similar to the right-angle triangle of the sealing element 2, which is vertical to the axis of the concave spherical flange 1, is used as a first bottom side, and the right-angle side of the cross section similar to the right-angle triangle of the annular groove of the concave spherical flange 1, which is vertical to the axis of the concave spherical flange 1, is used as a second bottom side; the length of the second bottom edge is 1.03 times to 1.05 times of the length of the first bottom edge.
And silver edge covering treatment is carried out on the edges where the three vertexes of the section of the sealing element 2 are similar to the right-angled triangle and the plane where the first bottom edge is located.
The spherical screw 5 comprises a polished rod section and a convex spherical matching section; the through holes uniformly distributed around the movable sleeve ring 4 comprise a smooth hole section and a concave spherical hole section; the convex spherical surface matching section is matched with the concave spherical surface hole section through a spherical surface.
The concave spherical flange 1 and the convex spherical flange 3 are made of aluminum alloy 5A06, the sealing element 2 is formed by combining silver and graphite, the loop ring 4 and the spherical screw 5 are made of aluminum alloy 5A14, and the fastening element 6 comprises standard components such as a flat gasket, an elastic gasket and a nut. The concave spherical flange 1 and the convex spherical flange 3 are respectively connected with an external pipeline.
The concave spherical surface and the convex spherical surface can adapt to the installation angle errors of the pipeline in all directions through rotating fit. Because the axes of the flanges at two ends are inclined in the process of compensating the error of the installation angle by the concave spherical surface and the convex spherical surface, the flange fastener is greatly influenced. When the axis is deflected slightly, the fastening bolt bears bending moment, so that the safe use is influenced; when the axis deflection is large, the fastening bolt installation will interfere and the installation cannot be completed. Therefore, the spherical screw 5 (shown in figure 2) with the spherical structure at the upper end is designed, the spherical pit is arranged on the lower surface (shown in figure 1) of the loop ring 4, the spherical pit and the spherical screw are matched, so that the bolt can be ensured to be always in an axial stretching state, and the situation that the screw bears bending moment when the installation angle has deviation is effectively avoided. The size of the bolt mounting through holes on the concave spherical flange 1 and the loop ring 4 is increased compared with the size of the bolt mounting through holes of a normal flange, and the interference of a fastening piece and a flange structure when the axis deflection is large is avoided. The inner diameter of the through hole on the circumference of the movable sleeve ring 4 is 1.2 to 1.5 times of the diameter of the screw rod 5.
The concave spherical flange 1 and the convex spherical flange 3 are assembled to form a triangular sealing structure with the inner concave bevel edge, in order to meet the sealing requirement, the sealing element 2 is designed into an annular structure with the outer convex bevel edge of the cross section, and the sharp corner and the bottom surface of the sealing element 2 are wrapped by silver strips, as shown in figure 3. The edge wrapping is used for avoiding the generation of redundant materials due to the falling of graphite in the mounting and dismounting processes and enhancing the strength of a sharp corner of the sealing element 2 in the compression deformation process; the metal silver is adopted because the material is softer, and the sealing surface of the convex spherical flange 3 is prevented from being scratched. In order to ensure the effective and reliable sealing of graphite, the compression amount of graphite is generally controlled to be more than 25%, so as to determine the dimension R in FIG. 3, and the design value of the compression amount of graphite in the embodiment of the invention is 39.6%.
The concave spherical flange 1 and the convex spherical flange 3 are assembled to form a triangular sealing structure with inwards concave bevel edges, when the triangular sealing structure is assembled, the sealing element 2 is tightly pressed in the triangular sealing structure by the concave spherical flange 1 and the convex spherical flange 3, the convex spherical flange 3 is gradually tightly pressed after being contacted with the outer edge of the sealing element 2 along with the increase of fastening force, and partial line contact occurs to form a sealing strip; the sealing element 2 deforms under the action of the pressing force, and the inner edge of the sealing element is in contact with the concave spherical flange to form effective sealing.
Due to the assembly requirement, the side face of the sealing element 2 and the side face of the sealing groove of the concave spherical flange are designed to be matched with each other in a tolerance zone, and an initial gap delta is designed at the position, and the value range of the initial gap delta is 0-0.15 mm as shown in fig. 4. Sufficient pressing force is applied between the concave-convex spherical flanges, and the sealing element 2 expands to eliminate an initial gap, so that effective sealing is realized.
The invention is characterized in that:
1) The sealing element 2 is designed into a silver-cladded structure similar to a right-angled triangle and with a bevel edge convex structure;
2) The side surface of the sealing element 2 and the side surface of the sealing groove of the concave spherical flange adopt a tolerance zone matching design scheme to realize effective sealing;
3) The fastener 6 adopts a spherical screw and a concave spherical surface is designed at the position of the loop ring contacted with the spherical screw so as to avoid the screw from bearing bending moment when the installation angle is deviated.
Examples
The invention aims to provide an assembly self-adaptive spherical flange connecting structure which can be reliably applied in a temperature range from 77K to normal temperature and has the angle compensation capability of 4 degrees in all directions, and the specific dimensions are as follows:
the inner diameter of the through holes uniformly distributed on the periphery of the movable lantern ring 4 is 10mm, the outer diameter of the polished rod section of the screw rod 5 is 7mm, the side length of the first bottom edge of the sealing element 2 is 3.9mm, and the side length of the inner edge is 7.5mm. The side length of the first bottom edge of the concave spherical flange 1 is 4.1mm, and the side length of the inner edge is 9.6mm. In fig. 1, the inner diameter of the central through hole of the concave spherical flange 1 and the convex spherical flange 3 is 50mm, the diameter of the reference circle where the axes of the through holes uniformly distributed on the upper circumference of the concave spherical flange 1 and the convex spherical flange 3 are located is 94mm, and the aperture of the through hole is 10mm. The spherical radii of the convex spherical flange 3 and the concave spherical flange 1 are both 37.5mm, and as shown in fig. 6, the distance h from the spherical center of the convex spherical flange 3 to the bottom surface of the convex spherical flange 3 is 25mm.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above. The embodiments of the present application and the technical features in the embodiments may be combined with each other without conflict.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are not particularly limited to the specific examples described herein.
Claims (10)
1. The utility model provides an assembly self-adaptation sphere flange joint structure which characterized in that includes: the sealing device comprises a concave spherical flange (1), a sealing element (2), a convex spherical flange (3), a movable sleeve ring (4), a spherical screw (5) and a fastener (6);
through holes are uniformly distributed on the periphery of the concave spherical flange (1) and the loop ring (4); the spherical screw (5) sequentially passes through the movable sleeve ring (4) and the through hole on the concave spherical flange (1) to be fixedly connected with the fastener (6);
a convex spherical flange (3) is arranged between the concave spherical flange (1) and the movable sleeve ring (4), the convex spherical flange (3) is in spherical fit with the concave spherical flange (1), and the convex spherical flange (3) is in surface contact with the movable sleeve ring (4); the concave spherical flange (1) is not contacted with the loop ring (4);
the spherical screw (5) is matched with the loop ring (4) through a spherical surface;
one side of the concave spherical flange (1) facing the convex spherical flange (3) is processed with a concave spherical surface, and the inner wall of the concave spherical surface is processed with an annular groove;
the sealing element (2) is of an annular structure, and the sealing element (2) is arranged in the annular groove to play a role in sealing.
2. An assembled adaptive spherical flange connection structure according to claim 1, characterized in that: the section of the annular groove is triangular.
3. An assembled adaptive spherical flange connection structure according to claim 2, characterized in that: the section of the sealing element (2) is a right-angle-like triangle, and the hypotenuse of the right-angle-like triangle is an outwardly protruding circular arc line.
4. An assembled adaptive spherical flange connection structure according to claim 3, wherein: the right-angle side of the cross section of the sealing element (2), which is vertical to the axis of the concave spherical flange (1), is used as a first bottom side, and the side of the cross section of the annular groove of the concave spherical flange (1), which is vertical to the axis of the concave spherical flange (1), is used as a second bottom side;
the length of the first bottom edge is smaller than that of the second bottom edge.
5. An assembled adaptive spherical flange connection structure according to claim 4, wherein: the length of the second bottom edge is 1.03 times to 1.05 times of the length of the first bottom edge.
6. An assembled adaptive spherical flange connection structure according to claim 3, wherein: the sealing element (2) is made of graphite.
7. An assembled adaptive spherical flange connection structure according to claim 6, wherein: and carrying out silver edge covering treatment on the seamed edge where the three vertexes in the section of the sealing element (2) are positioned and the plane where the first bottom edge is positioned.
8. An assembly adaptive spherical flange connection structure according to any one of claims 1 to 7, characterized in that: the spherical screw (5) comprises a polished rod section and a convex spherical surface matching section;
the through holes uniformly distributed on the periphery of the movable sleeve ring (4) comprise a smooth hole section and a concave spherical hole section;
the convex spherical surface matching section is matched with the concave spherical surface hole section through a spherical surface.
9. An assembly adaptive spherical flange connection structure according to claim 8, wherein: the inner diameter of the unthreaded hole section of the movable lantern ring (4) is larger than the outer diameter of the unthreaded rod section of the spherical screw (5).
10. An assembled adaptive spherical flange connection structure according to claim 9, wherein: the inner diameter of the smooth hole section of the movable sleeve ring (4) is 1.2 to 1.5 times larger than the outer diameter of the smooth hole section of the spherical screw (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210770584.5A CN115163951A (en) | 2022-06-30 | 2022-06-30 | Assembly self-adaptation sphere flange joint structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210770584.5A CN115163951A (en) | 2022-06-30 | 2022-06-30 | Assembly self-adaptation sphere flange joint structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115163951A true CN115163951A (en) | 2022-10-11 |
Family
ID=83488821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210770584.5A Pending CN115163951A (en) | 2022-06-30 | 2022-06-30 | Assembly self-adaptation sphere flange joint structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115163951A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2349761A1 (en) * | 1976-04-27 | 1977-11-25 | Peugeot | Swivel joint for automobile exhaust pipe - has spherical joint surface to permit limited angular movement |
| US4290581A (en) * | 1979-09-21 | 1981-09-22 | Acf Industries, Incorporated | Seat assembly for ball valves |
| FR2539480A1 (en) * | 1983-01-19 | 1984-07-20 | Pont A Mousson | Sealing gasket locked between tubular cast iron elements interlocking with flange and bolts |
| US4840409A (en) * | 1988-05-05 | 1989-06-20 | Taper-Lok Corporation | Swivel flow line connector |
| SU1499032A2 (en) * | 1987-12-29 | 1989-08-07 | Предприятие П/Я Р-6521 | Demountable stationary sealing device |
| US20040175226A1 (en) * | 2001-06-29 | 2004-09-09 | Katorgin Boris Ivanovitch | Flanged coupling device with a static ball-and-socket joint |
| KR100693935B1 (en) * | 2006-01-12 | 2007-03-12 | 김항경 | Ball valve for cryogenic service |
| JP3178893U (en) * | 2012-07-25 | 2012-10-04 | 藍諠實業有限公司 | Ball valve washer structure |
| CN202646298U (en) * | 2012-05-21 | 2013-01-02 | 中航商用航空发动机有限责任公司 | Contact bolt and fixing assembly of the same |
| CN104747750A (en) * | 2015-02-04 | 2015-07-01 | 苏州纽威阀门股份有限公司 | Floating ball valve |
| CN208442304U (en) * | 2018-07-06 | 2019-01-29 | 西诺威阀门控制（苏州）有限公司 | The valve seat construction of heavy caliber low-pressure fixing ball valve |
| CN112066116A (en) * | 2020-09-17 | 2020-12-11 | 西安航天动力研究所 | Spherical sealing joint for hydraulic test of turbopump of liquid rocket engine |
| CN212839378U (en) * | 2020-07-08 | 2021-03-30 | 浙江耐高阀门有限公司 | Novel self-sealing ring |
-
2022
- 2022-06-30 CN CN202210770584.5A patent/CN115163951A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2349761A1 (en) * | 1976-04-27 | 1977-11-25 | Peugeot | Swivel joint for automobile exhaust pipe - has spherical joint surface to permit limited angular movement |
| US4290581A (en) * | 1979-09-21 | 1981-09-22 | Acf Industries, Incorporated | Seat assembly for ball valves |
| FR2539480A1 (en) * | 1983-01-19 | 1984-07-20 | Pont A Mousson | Sealing gasket locked between tubular cast iron elements interlocking with flange and bolts |
| SU1499032A2 (en) * | 1987-12-29 | 1989-08-07 | Предприятие П/Я Р-6521 | Demountable stationary sealing device |
| US4840409A (en) * | 1988-05-05 | 1989-06-20 | Taper-Lok Corporation | Swivel flow line connector |
| US20040175226A1 (en) * | 2001-06-29 | 2004-09-09 | Katorgin Boris Ivanovitch | Flanged coupling device with a static ball-and-socket joint |
| KR100693935B1 (en) * | 2006-01-12 | 2007-03-12 | 김항경 | Ball valve for cryogenic service |
| CN202646298U (en) * | 2012-05-21 | 2013-01-02 | 中航商用航空发动机有限责任公司 | Contact bolt and fixing assembly of the same |
| JP3178893U (en) * | 2012-07-25 | 2012-10-04 | 藍諠實業有限公司 | Ball valve washer structure |
| CN104747750A (en) * | 2015-02-04 | 2015-07-01 | 苏州纽威阀门股份有限公司 | Floating ball valve |
| CN208442304U (en) * | 2018-07-06 | 2019-01-29 | 西诺威阀门控制（苏州）有限公司 | The valve seat construction of heavy caliber low-pressure fixing ball valve |
| CN212839378U (en) * | 2020-07-08 | 2021-03-30 | 浙江耐高阀门有限公司 | Novel self-sealing ring |
| CN112066116A (en) * | 2020-09-17 | 2020-12-11 | 西安航天动力研究所 | Spherical sealing joint for hydraulic test of turbopump of liquid rocket engine |
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