CN111594678A - End face sealing structure for rotary compensator and rotary compensator - Google Patents
End face sealing structure for rotary compensator and rotary compensator Download PDFInfo
- Publication number
- CN111594678A CN111594678A CN202010550740.8A CN202010550740A CN111594678A CN 111594678 A CN111594678 A CN 111594678A CN 202010550740 A CN202010550740 A CN 202010550740A CN 111594678 A CN111594678 A CN 111594678A
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- China
- Prior art keywords
- sealing
- rotary compensator
- filler
- boss
- flange
- 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 title claims abstract description 106
- 239000000945 filler Substances 0.000 claims abstract description 33
- 238000012856 packing Methods 0.000 claims description 11
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims 1
- 239000003566 sealing material Substances 0.000 abstract description 7
- 238000002679 ablation Methods 0.000 abstract description 5
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 239000000843 powder 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
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000009434 installation 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 an end face sealing structure for a rotary compensator and the rotary compensator adopting the structure. The end face sealing structure for the rotary compensator comprises an annular inner boss (9) arranged on the inner surface of an outer sleeve (6) and a sealing filler (8) arranged between a sealing pressing flange (5) and the annular inner boss (9), wherein a sealing pressing ring (7) is arranged between the sealing pressing flange (5) and the sealing filler (8), the cross section of the sealing pressing ring (7) is in a concave shape, and one end, adjacent to the sealing filler (8), of the sealing pressing flange (5) extends into a concave-shaped groove opening of the sealing pressing ring (7). The invention can effectively delay the ablation amount of the sealing material at high temperature, reduce the loss of the sealing material from an assembly gap in the working state of the rotary compensator and obviously improve the sealing effect.
Description
Technical Field
The invention relates to an end face sealing structure for a rotary compensator and the rotary compensator.
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 effectively delay the ablation amount of a sealing material at high temperature and reduce the loss of the sealing material in an assembly gap of a rotary compensator in a working state, the invention provides an end face sealing structure for the rotary compensator with better sealing performance and the rotary compensator.
The end face sealing structure for the rotary compensator comprises an annular inner boss arranged on the inner surface of an outer sleeve and sealing filler arranged between a sealing pressing flange and the annular inner boss, wherein a sealing compression ring is arranged between the sealing pressing flange and the sealing filler, the cross section of the sealing compression ring is in a concave shape, and one end, adjacent to the sealing filler, of the sealing pressing flange extends into a concave groove of the sealing compression ring.
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 one end of the inner pipe extends into the outer sleeve, the sealing and pressing flange is sleeved on the inner pipe, and 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, sealing filler is arranged between the annular inner boss and one end, extending into the outer sleeve, of the sealing pressing flange, and a sliding piece or an end face sealing piece is arranged in a cavity formed between the annular outer boss and the annular inner boss; be provided with sealed clamping ring between sealed hold-down flange and the sealing filler, sealed clamping ring cross-section is the character cut in bas-relief, and sealed hold-down flange stretches into the character cut in bas-relief notch of sealed clamping ring with the adjacent one end of sealing filler.
Furthermore, the outer sleeve and the reducer pipe are of an integrated structure formed integrally, so that the problem of potential safety hazards caused by butt joint of the outer sleeve and the reducer pipe in a welding mode at present is solved.
Furthermore, a limiting block is arranged in the reducing pipe to prevent the product from dislocating in the opposite direction in the engineering installation process and prevent a sliding piece or an end face sealing piece arranged between the inner annular boss and the outer annular boss from shifting.
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.
The sliding member is a ball or a sliding ring.
The sealing compression ring is arranged between the sealing compression flange and the sealing filler, so that the assembly gap between the sealing compression flange and the outer sleeve and the inner pipe is filled and reduced, and the aim of isolating or reducing the contact between the sealing filler and oxygen is fulfilled, so that the ablation amount of the sealing filler graphite at high temperature is effectively delayed, and meanwhile, the loss of the sealing material from the assembly gap in the working state of the rotary compensator can be effectively reduced.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is an enlarged view of a portion (a) of fig. 1.
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 press ring, 8 is sealing filler, 9 is an annular inner boss, 10 is a sliding piece, 11 is an annular outer boss, 12 is a limiting block, 13 is a reducer, and 14 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 and 2, the rotation compensator of the present embodiment includes an inner tube 1, an outer sleeve 6, a reducer 13, and a sealing and pressing flange 5, wherein 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, and the inner tube 1 and the outer sleeve are connected through a screw 2, a nut 3, and a gasket 4. An annular inner boss 9 is arranged on the inner surface of the outer sleeve 6, an annular outer boss 11 is arranged on the outer surface of the inner tube 1, a sealing filler 8 is arranged between the annular inner boss 9 and one end, extending into the outer sleeve 6, of the sealing pressing flange 5, a sliding piece 10 is arranged in a cavity formed between the annular outer boss 11 and the annular inner boss 9, a sealing pressing ring 7 is arranged between the sealing pressing flange 5 and the sealing filler 8, the cross section of the sealing pressing ring 7 is in a concave shape, and one end, adjacent to the sealing filler 6, of the sealing pressing flange 5 extends into a concave groove of the sealing pressing ring 7.
In order to prevent the product from dislocating in the opposite direction in the engineering installation process and prevent the sliding part 10 arranged between the inner and outer annular bosses from displacing, a limiting block 12 is arranged in the reducer pipe 13.
In the present embodiment, the sliding member 10 is a ball.
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 5, a radial through hole arranged in each injection port is communicated with a transverse hole at the waist part, a screw plug with a hole is arranged at the outer end of each radial through hole, and the screw plug arranged in each transverse hole traverses the radial through hole to form a sealing filler filling device 14 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 present embodiment, an end face seal is disposed in the cavity formed between the annular outer boss and the annular inner boss instead of the sliding member 10, and the end face seal is made of a flexible material such as graphite, which can further ensure the sealing performance of the rotary compensator.
Claims (6)
1. The end face sealing structure for the rotary compensator comprises an annular inner boss (9) arranged on the inner surface of an outer sleeve (6) and a sealing filler (8) arranged between a sealing pressing flange (5) and the annular inner boss (9), and is characterized in that a sealing pressing ring (7) is arranged between the sealing pressing flange (5) and the sealing filler (8), the cross section of the sealing pressing ring (7) is in a concave shape, and one end, adjacent to the sealing filler (8), of the sealing pressing flange (5) extends into a concave groove opening of the sealing pressing ring (7).
2. The utility model provides a rotary compensator, including inner tube (1), outer tube (6), reducing pipe (13), sealed flange (5) compress tightly, the one end of inner tube (1) stretches into in outer tube (6), sealed flange (5) suit is on inner tube (1), its one end stretches into in outer tube (6), be equipped with annular inner boss (9) on the internal surface of outer tube (6), be equipped with annular outer boss (11) on the surface of inner tube (1), be equipped with between the one end that outer tube (6) were stretched into in annular inner boss (9) and sealed flange (5) and seal packing (8), be provided with slider (10) or end face seal spare in the cavity that forms between annular outer boss (11) and the annular inner boss, its characterized in that: sealing pressing flange (5) and sealing filler (8) are provided with sealing clamping ring (7), sealing clamping ring (7) cross-section is the character cut in bas-relief, and sealing pressing flange (5) stretches into in the character cut in bas-relief notch of sealing clamping ring (7) with the adjacent one end of sealing filler (8).
3. A rotary compensator according to claim 2, characterized in that the outer sleeve (6) and the reducer (13) are of one-piece integral construction.
4. A rotary compensator according to claim 2, characterized in that the outer sleeve (6) is provided with a sealing packing filling device (14).
5. A rotary compensator according to claim 2, characterized in that a stop block (12) is arranged in the reducer pipe (13).
6. Rotational compensator according to claim 2, characterized in that the slide (10) is a ball or a sliding ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010550740.8A CN111594678A (en) | 2020-06-16 | 2020-06-16 | End face sealing structure for rotary compensator and rotary compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010550740.8A CN111594678A (en) | 2020-06-16 | 2020-06-16 | End face sealing structure for rotary compensator and rotary compensator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111594678A true CN111594678A (en) | 2020-08-28 |
Family
ID=72186411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010550740.8A Pending CN111594678A (en) | 2020-06-16 | 2020-06-16 | End face sealing structure for rotary compensator and rotary compensator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111594678A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576849A (en) * | 2020-12-21 | 2021-03-30 | 江苏贝特管件有限公司 | Double-sealed-cavity sealing structure and sleeve compensator adopting same |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2403983Y (en) * | 1999-11-18 | 2000-11-01 | 翁秋胜 | Fast joint for oxygen lance |
| CN1908498A (en) * | 2006-08-11 | 2007-02-07 | 宋章根 | Pipe used high pressure resistant rotary compensator |
| CN103994296A (en) * | 2014-06-06 | 2014-08-20 | 江苏贝特管件有限公司 | High-pressure-resistant integrated leakage-free rotating compensator |
| CN204717214U (en) * | 2015-03-10 | 2015-10-21 | 航天晨光股份有限公司 | The reducible multi-sealed sleeve expansion joint of a kind of thermal insulation layer |
| CN208935614U (en) * | 2018-10-29 | 2019-06-04 | 江苏贝特管件有限公司 | A kind of sealing structure for whirl compensator |
| CN209444958U (en) * | 2018-12-29 | 2019-09-27 | 江苏贝特管件有限公司 | A kind of whirl compensator sealing structure with the level on outer tube inner convex platform |
| CN212509954U (en) * | 2020-06-16 | 2021-02-09 | 江苏贝特管件有限公司 | End face sealing structure for rotary compensator and rotary compensator |
-
2020
- 2020-06-16 CN CN202010550740.8A patent/CN111594678A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2403983Y (en) * | 1999-11-18 | 2000-11-01 | 翁秋胜 | Fast joint for oxygen lance |
| CN1908498A (en) * | 2006-08-11 | 2007-02-07 | 宋章根 | Pipe used high pressure resistant rotary compensator |
| CN103994296A (en) * | 2014-06-06 | 2014-08-20 | 江苏贝特管件有限公司 | High-pressure-resistant integrated leakage-free rotating compensator |
| US20170152976A1 (en) * | 2014-06-06 | 2017-06-01 | Jiangsu Beite Pipe Fitting Co., Ltd. | High-pressure tolerant integrated leakage-proof sleeve compensator |
| CN204717214U (en) * | 2015-03-10 | 2015-10-21 | 航天晨光股份有限公司 | The reducible multi-sealed sleeve expansion joint of a kind of thermal insulation layer |
| CN208935614U (en) * | 2018-10-29 | 2019-06-04 | 江苏贝特管件有限公司 | A kind of sealing structure for whirl compensator |
| CN209444958U (en) * | 2018-12-29 | 2019-09-27 | 江苏贝特管件有限公司 | A kind of whirl compensator sealing structure with the level on outer tube inner convex platform |
| CN212509954U (en) * | 2020-06-16 | 2021-02-09 | 江苏贝特管件有限公司 | End face sealing structure for rotary compensator and rotary compensator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576849A (en) * | 2020-12-21 | 2021-03-30 | 江苏贝特管件有限公司 | Double-sealed-cavity sealing structure and sleeve compensator adopting same |
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