CN111594682A - Rotary compensator end face sealing structure and rotary compensator - Google Patents
Rotary compensator end face sealing structure and rotary compensator Download PDFInfo
- Publication number
- CN111594682A CN111594682A CN202010579342.9A CN202010579342A CN111594682A CN 111594682 A CN111594682 A CN 111594682A CN 202010579342 A CN202010579342 A CN 202010579342A CN 111594682 A CN111594682 A CN 111594682A
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- Prior art keywords
- sealing
- outer sleeve
- annular
- rotary compensator
- annular groove
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- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 92
- 239000000945 filler Substances 0.000 claims abstract description 19
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- 238000012856 packing Methods 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims 1
- 239000003566 sealing material Substances 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- 238000002679 ablation Methods 0.000 abstract description 5
- 229910002804 graphite Inorganic materials 0.000 abstract description 5
- 239000010439 graphite Substances 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 5
- 238000011010 flushing procedure Methods 0.000 abstract description 4
- 230000004580 weight loss Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 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
- F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
- F16L27/0804—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another
- F16L27/0808—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation
-
- 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
- F16J15/16—Sealings between relatively-moving surfaces
-
- 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
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/168—Sealings between relatively-moving surfaces which permits material to be continuously conveyed
-
- 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
- F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
- F16L27/0804—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another
- F16L27/0808—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation
- F16L27/0812—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with slide bearings
-
- 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
- F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
- F16L27/0804—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another
- F16L27/0808—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation
- F16L27/0824—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with ball or roller bearings
-
- 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
- F16L51/00—Expansion-compensation arrangements for pipe-lines
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
- Joints Allowing Movement (AREA)
Abstract
The invention relates to a rotary compensator end face sealing structure and a rotary compensator adopting the same. Rotary compensator end face seal structure, including inner tube (1), sealed hold-down flange (5) and outer tube (6), outer tube (6) supply to open on the inner wall of inner tube (1) male one end tip one end, are provided with annular seal (14) in annular groove (16) to fixed by suit on sealed hold-down flange (5), be located sealed clamping ring (15) in outer tube (6) annular groove outside. The invention can effectively delay the thermal weight loss (ablation amount) of the sealing filler graphite at high temperature, effectively prevent the loss of the sealing material from the assembly gap between the outer sleeve and the sealing pressing flange under the medium flushing action of the rotary compensator due to long-term use, and obviously improve the sealing effect.
Description
Technical Field
The invention relates to a rotary compensator and an end face sealing structure thereof.
Background
At present, rotary compensators are increasingly widely used in heat pipelines. The rotary compensator has the advantages of high safety performance, convenience in design, large compensation amount, high economical efficiency of pipeline operation, diversified installation modes and types and the like, and is a product which is preferred by design houses and application units such as thermal power plants and the like. The main technical core of the rotary compensator lies in the sealing technology, and although people are always improving the sealing performance of the rotary compensator, the rotary compensator still has the possibility of leakage in the working process, and the reasons for the leakage are as follows:
1. ablation in an aerobic state at high temperature.
The rotary compensator operates at a high temperature for a long time, and the ablation amount of the sealing material (graphite, etc.) in a high-temperature aerobic state is reduced in volume due to contact with oxygen, thereby causing leakage. Therefore, controlling the amount of contact between the sealing filler and oxygen is one of the most important means for ensuring long-term sealing.
2. The filler is worn during operation.
The inner pipe and the outer sleeve of the rotary compensator cannot be absolutely smooth (namely, the friction coefficient is 0), so that the packing is abraded due to the relative rotation of the inner pipe and the outer sleeve when the rotary compensator works, part of the packing is easily lost from an assembly gap due to the fact that the packing is broken into pieces and powder, the volume of the packing in a sealing cavity is reduced, the sealing pressing force is reduced, and leakage occurs.
3. Wear from oxidation of the seal cavity surfaces.
After the rotary compensator is used for a long time, under the influence of medium adverse factors (such as chloride ions, humidity and temperature) in a pipeline, a contact surface of a sealing cavity and a sealing material is corroded to form unevenness, and the packing is easily abraded under the working state of the rotary compensator, so that part of the sealing packing is in a fragment powder state and is easily lost from an assembly gap, the volume of the packing in the sealing cavity is reduced, the sealing pressing force is reduced, and leakage is caused.
4. The chemical reaction of the seal packing with the media (high temperature steam, high temperature hot water, etc.) is lost.
Because the medium can react with the sealing filler at high temperature (for example, C + H)2O (high temperature) ═ CO + H2) The solid volume of the sealing filler is reduced, the sealing performance is reduced, and leakage is easy to occur.
5. And (5) scouring the sealing packing by the medium under a high-pressure state.
Under the working condition, the medium in the high-temperature and high-pressure state in the rotary compensator easily enters the sealing cavity from the assembly gap to form strong impact force on the sealing filler, and the sealing filler can be lost under the flushing of the high-temperature and high-pressure medium after long-term use, so that the sealing performance is reduced.
Therefore, it is an objective of those skilled in the art to further improve the sealing performance of the rotary compensator.
Disclosure of Invention
In order to delay the thermal weight loss (ablation amount) of the sealing filler graphite at high temperature and prevent the loss of a sealing material of a rotary compensator from an assembly gap between an outer sleeve and a sealing pressing flange under the action of medium flushing due to long-term use of the sealing material, the invention provides a sealing structure for the rotary compensator with better sealing performance and the rotary compensator.
The sealing structure of the rotary compensator comprises an inner pipe, a sealing compression flange and an outer sleeve, wherein an annular groove is formed in the inner wall of the end part of the outer sleeve, into which the inner pipe is inserted, and an annular sealing element is arranged in the annular groove and is fixed by a sealing compression ring which is sleeved on the sealing compression flange and positioned on the outer side of the annular groove of the outer sleeve.
The rotary compensator adopts the end face sealing structure and comprises an inner pipe, an outer sleeve, a reducer pipe and a sealing and pressing flange, wherein the outer sleeve is sleeved on the inner pipe, one end of the inner pipe extends into the outer sleeve, the sealing and pressing flange is sleeved on the inner pipe, one end of the sealing and pressing flange extends into the outer sleeve, an annular inner boss is arranged on the inner surface of the outer sleeve, an annular outer boss is arranged on the outer surface of the inner pipe, a sliding piece or an end face sealing piece is arranged between the annular inner boss and the annular outer boss, sealing filler is arranged between the annular inner boss and one end of the sealing and pressing flange extending into the outer sleeve, an annular groove is formed in the inner wall of the end part of the outer sleeve, into which the inner pipe is inserted, an annular sealing piece is arranged in the annular groove.
Furthermore, the sealing press ring is connected with the outer sleeve through a fastener.
In order to solve the potential safety hazard problem caused by the butt joint of the outer sleeve and the reducer pipe in a welding mode, the outer sleeve and the reducer pipe are of an integrally formed integrated structure.
In order to avoid the sealing filler from generating a gap due to normal abrasion in long-term use so as to influence the sealing performance of the whole rotary compensator, the outer sleeve is provided with a sealing filler filling device.
In order to prevent the product from dislocating in the opposite direction in the engineering installation process and prevent the sliding piece or the end face sealing piece arranged between the inner ring-shaped boss and the outer ring-shaped boss from shifting, a limiting block is arranged in the reducer pipe.
According to the invention, the annular groove is formed in the inner wall of the end part of the outer sleeve, into which the inner pipe is inserted, and the annular sealing element is arranged in the annular groove, so that the annular sealing element is tightly attached to the sealing and pressing flange, the assembly gap between the outer sleeve and the sealing and pressing flange is effectively filled, a seal is formed, air is isolated, the thermal weight loss (ablation amount) of the sealing filler graphite at high temperature is effectively delayed, the loss of the sealing material from the assembly gap between the outer sleeve and the sealing and pressing flange under the medium flushing action of the rotating compensator for a long time is effectively prevented, and the sealing effect is obviously improved.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is an enlarged view of a part (E) of the invention.
Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.
In fig. 1-3, 1 is an inner tube, 2 is a stud, 3 is a nut, 4 is a gasket, 5 is a sealing hold-down flange, 6 is an outer sleeve, 7 is a sealing filler, 8 is an annular inner boss, 9 is a sliding member, 10 is an annular outer boss, 11 is a stopper, 12 is a reducer, 13 is a fastener, 14 is an annular sealing member, 15 is a sealing press ring, 16 is an annular groove, and 17 is a filling device.
Detailed Description
The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the present invention when taken in conjunction with the accompanying drawings. The drawings are not intended to be to scale, emphasis instead being placed upon illustrating the principles of the embodiments.
Example 1
As shown in fig. 1-2, the rotary compensator of this embodiment includes an inner tube (1), an outer sleeve (6), a reducer (12), and a sealing and pressing flange (5), wherein the outer sleeve (6) is sleeved on the inner tube (1), one end of the inner tube (1) extends into the outer sleeve (6), the sealing and pressing flange (5) is sleeved on the inner tube (1), and one end of the sealing and pressing flange extends into the outer sleeve (6). The outer sleeve (6) and the reducer pipe (12) are of an integrated structure which is formed integrally. The inner surface of an outer sleeve (6) is provided with an annular inner boss (8), the outer surface of an inner pipe (1) is provided with an annular outer boss (10), a sliding piece (9) is arranged between the annular inner boss (8) and the annular outer boss (10), a sealing filler (7) is arranged between the annular inner boss (8) and one end, extending into the outer sleeve (6), of a sealing pressing flange (5), the inner wall of the end part, inserted into the inner pipe (1), of the outer sleeve (6) is provided with an annular groove (16), an annular sealing piece (14) is arranged in the annular groove (16), and the annular sealing piece (14) is fixed by a sealing pressing ring (15) which is sleeved on the sealing pressing flange (5) and is positioned outside the annular groove (16) of the outer sleeve through a fastener (13). The annular sealing element (14) is tightly attached to the sealing and pressing flange, and fills an assembly gap between the outer sleeve (6) and the sealing and pressing flange (5) to form a seal.
In the present embodiment, the sliding member 9 is a sliding ring, but a conventional ball may be used as the sliding member.
Example 2
As shown in fig. 3, the basic structure of the present embodiment is the same as that of embodiment 1, except that:
in order to keep good sealing performance, 4-30 injection ports are uniformly distributed on the outer sleeve 6 along the same circumference at the position corresponding to the sealing filler 8, a radial through hole arranged in each injection port is communicated with a transverse hole at the waist part, the outer end of each radial through hole is provided with a screw plug with a hole, and the screw plug arranged in the transverse hole traverses the radial through hole to form a sealing filler filling device 17 of a valve structure. When the rotary compensator is used, if the sealing performance is reduced and leakage occurs, the screw plug arranged at the outer end of the injection opening can be removed on line, then the screw plug in the transverse hole is rotated, the hole on the screw plug is communicated with the radial through hole, and the injection opening is supplemented with sealing filler by using a pressure gun. After the supplement is finished, firstly screwing the screw plug in the transverse hole, then pulling out the pressure gun, and then reinstalling the screw plug at the outer end of the inlet. Therefore, the sealing performance of the rotary compensator can be timely recovered by replenishing the sealing filler on line.
In the embodiment, the sliding member 9 is replaced by an end face seal in the cavity formed between the annular outer boss 10 and the annular inner boss 8, and the end face seal is made of flexible materials such as graphite, so that the sealing performance of the rotary compensator can be further ensured.
Claims (7)
1. The utility model provides a rotary compensator end face seal structure, includes inner tube (1), sealed hold-down flange (5) and outer tube (6), and its characterized in that outer tube (6) supply to open on the one end tip inner wall that inner tube (1) inserted has an annular groove (16), is provided with annular seal (14) in annular groove (16) to fixed by suit on sealed hold-down flange (5), be located outer tube (6) annular groove outside sealed clamping ring (15).
2. A sealing structure for a rotation compensator according to claim 1, characterized in that the sealing collar (15) is connected to the outer sleeve (6) by means of a fastening member (13).
3. A rotary compensator comprises an inner tube (1), an outer sleeve (6), a reducer pipe (12) and a sealing and pressing flange (5), wherein the outer sleeve (6) is sleeved on the inner tube (1), one end of the inner tube (1) extends into the outer sleeve (6), the sealing and pressing flange (5) is sleeved on the inner tube (1), one end of the sealing and pressing flange extends into the outer sleeve (6), an annular inner boss (8) is arranged on the inner surface of the outer sleeve (6), an annular outer boss (10) is arranged on the outer surface of the inner tube (1), a sliding piece (9) or an end face sealing piece is arranged between the annular inner boss (8) and the annular outer boss (10), a sealing filler (7) is arranged between the annular inner boss (8) and one end of the sealing and pressing flange (5) extending into the outer sleeve (6), and is characterized in that an annular groove (16) is formed on the inner wall of one end part of the outer sleeve (6), an annular sealing element (14) is arranged in the annular groove (16) and is fixed by a sealing press ring (15) which is sleeved on the sealing press flange (5) and is positioned outside the annular groove of the outer sleeve (6).
4. A rotary compensator according to claim 3, characterized by the sealing collar (15) being connected to the outer sleeve (6) by fasteners (13).
5. A rotary compensator according to claim 3, characterized in that the outer sleeve (7) is provided with a sealing packing filling device (17).
6. A rotary compensator according to claim 3, characterized by a stop block (11) arranged in the reducer pipe (12).
7. A rotary compensator according to claim 3, characterized in that the outer sleeve (6) and the reducer (12) are of one-piece integral construction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202010579342.9A CN111594682A (en) | 2020-06-23 | 2020-06-23 | Rotary compensator end face sealing structure and rotary compensator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202010579342.9A CN111594682A (en) | 2020-06-23 | 2020-06-23 | Rotary compensator end face sealing structure and rotary compensator |
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CN111594682A true CN111594682A (en) | 2020-08-28 |
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CN202010579342.9A Pending CN111594682A (en) | 2020-06-23 | 2020-06-23 | Rotary compensator end face sealing structure and rotary compensator |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114688374A (en) * | 2022-04-22 | 2022-07-01 | 江苏奥光波纹管有限公司 | High-pressure-resistant triple leakage-proof rotary compensator |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU4918179A (en) * | 1978-12-15 | 1980-06-19 | Johnson Corporation, The | Rotary pipe joint |
US4336944A (en) * | 1979-08-27 | 1982-06-29 | Raybestos-Manhattan, Inc. | Mechanical-dynamic rotary seal |
CN1908498A (en) * | 2006-08-11 | 2007-02-07 | 宋章根 | Pipe used high pressure resistant rotary compensator |
CN201057337Y (en) * | 2007-06-29 | 2008-05-07 | 江苏五星波纹管有限公司 | Non-thrust rotary compensator |
CN204127557U (en) * | 2014-11-04 | 2015-01-28 | 陈墅庚 | Novel precise formula high pressure resistant rotary compensator |
CN205331654U (en) * | 2016-01-12 | 2016-06-22 | 江苏远通波纹管有限公司 | Ball -type compensator |
CN205991271U (en) * | 2016-08-12 | 2017-03-01 | 洛阳双瑞特种装备有限公司 | A kind of slip-type expansion joint with auto-alarm function |
CN206694720U (en) * | 2017-03-16 | 2017-12-01 | 沈向东 | Internal leakage early warning type sleeve expansion joint |
CN109854853A (en) * | 2018-12-05 | 2019-06-07 | 洛阳双瑞特种装备有限公司 | A kind of low friction pressure self-tightening whirl compensator |
CN212361163U (en) * | 2020-06-23 | 2021-01-15 | 江苏贝特管件有限公司 | Rotary compensator end face sealing structure and rotary compensator |
-
2020
- 2020-06-23 CN CN202010579342.9A patent/CN111594682A/en active Pending
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU4918179A (en) * | 1978-12-15 | 1980-06-19 | Johnson Corporation, The | Rotary pipe joint |
US4336944A (en) * | 1979-08-27 | 1982-06-29 | Raybestos-Manhattan, Inc. | Mechanical-dynamic rotary seal |
CN1908498A (en) * | 2006-08-11 | 2007-02-07 | 宋章根 | Pipe used high pressure resistant rotary compensator |
CN201057337Y (en) * | 2007-06-29 | 2008-05-07 | 江苏五星波纹管有限公司 | Non-thrust rotary compensator |
CN204127557U (en) * | 2014-11-04 | 2015-01-28 | 陈墅庚 | Novel precise formula high pressure resistant rotary compensator |
CN205331654U (en) * | 2016-01-12 | 2016-06-22 | 江苏远通波纹管有限公司 | Ball -type compensator |
CN205991271U (en) * | 2016-08-12 | 2017-03-01 | 洛阳双瑞特种装备有限公司 | A kind of slip-type expansion joint with auto-alarm function |
CN206694720U (en) * | 2017-03-16 | 2017-12-01 | 沈向东 | Internal leakage early warning type sleeve expansion joint |
CN109854853A (en) * | 2018-12-05 | 2019-06-07 | 洛阳双瑞特种装备有限公司 | A kind of low friction pressure self-tightening whirl compensator |
CN212361163U (en) * | 2020-06-23 | 2021-01-15 | 江苏贝特管件有限公司 | Rotary compensator end face sealing structure and rotary compensator |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114688374A (en) * | 2022-04-22 | 2022-07-01 | 江苏奥光波纹管有限公司 | High-pressure-resistant triple leakage-proof rotary compensator |
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