CN205136894U - Low temperature rotary joint - Google Patents
Low temperature rotary joint Download PDFInfo
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- CN205136894U CN205136894U CN201520922492.XU CN201520922492U CN205136894U CN 205136894 U CN205136894 U CN 205136894U CN 201520922492 U CN201520922492 U CN 201520922492U CN 205136894 U CN205136894 U CN 205136894U
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- steel ball
- ball rolling
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Abstract
The utility model provides a low temperature rotary joint, includes and at the below of inner circle fixedly connected with lower flange, is equipped with the flange in the top of inner circle in inner circle and outer lane, two steel ball raceways about being equipped with between the inside and outside circle, interior circling is equipped with the nitrogen purging passageway, and it has the steel ball raceway of going up to sweep the mouth to open on the inner circle outer wall of last steel ball raceway top, division has lower steel ball raceway to sweep the mouth on the inner circle outer wall of steel ball raceway below down, is equipped with the nitrogen gas passageway that circulates between upper and lower steel ball raceway, be equipped with nitrogen gas intake pipe joint on the lower flange, be equipped with nitrogen gas and go out the pipe connection on last flange, be equipped with the intercommunication passageway that intercommunication nitrogen gas circulation passageway and nitrogen gas go out the pipe connection on the outer lane. The utility model discloses with inner circle and lower flange fixed connection, upward the flange meets with the outer lane is fixed, like this, need not dismantle inside and outside circle when changing nitrogen gas sealing device, only need unclamp the lower flange and to carry out nitrogen gas sealing device's change, has solved nitrogen gas sealing device and has dismantled inconvenient problem.
Description
Technical field
The utility model relates to a kind of LNG Liquefied natural gas transportation art, particularly a kind of cryogenic swivel.
Background technique
At present, loading arm used in existing petrochemical industry fluid assembly and disassembly process, oil filling riser, oil-feeding arms etc. all need to use swivel joint, swivel joint performs as core component and carries the rotation of loading arm and the action such as to take down the exhibits, and the rationality of its structural design decides the sealing of equipment and handling, and existing swivel joint comprises upper flange, lower flange, inner ring, outer ring, roller and Sealing, there is following shortcoming in such design: (1) is installed and changed the inconvenience of nitrogen-sealed circle, because roller is covered with and between inner ring and outer ring, after needing first to load nitrogen-sealed circle when therefore installing, by to compress and in rotating, roller could be assembled in outer ring, during dismounting, cannot change at the scene, need to remove roller in advance just can change, (2) the easy ponding in nitrogen-sealed circle position freezes, make to reach sealing effect, because nitrogen-sealed circle is arranged between inner ring and outer ring, therefore just there is a groove placing seal ring this position, when oil filling riser transmission cryogenic media, this position just easy ponding also freezes, and causes swivel joint to rotate bite and even cannot rotate, (3) because swivel joint works under ultra low temperature state, for ensureing that its raceway gap does not freeze, need to maintain nitrogen circulation, therefore in its structure, nitrogen purge passage is devised, the displacement carrying out air with nitrogen is needed before using, in order to avoid use time purge passage because of air meet cold and icing, swivel joint is caused to rotate, the nitrogen of existing swivel design enters in the middle of two row rollers by the inner chamber of inner ring in the middle of roller, easily occur that in raceway, two row roller outside air replace halfway phenomenon, thus cause icing, (4) the nitrogen entry and exit of existing swivel design are in the radial direction of upper lower flange, therefore nitrogen pipeline is all in outside, because bend loss during adapter is more, nitrogen pipeline is arranged more outer, easily collide nitrogen purge line at loading arm inner arm, outer arm, overhanging arm when rotating, cause nitrogen pipeline to destroy, (5) groove of existing swivel joint upper flange place primary seal circle is open, primary seal circle in use, due to liquid LNG (LNG Liquefied natural gas) cold service meeting shrinkage, can expand getting back to primary seal circle under normal temperature state, under expansive force effect, easily make primary seal circle to fluid passage internal strain, primary seal was lost efficacy and causes leakage.
Summary of the invention
The technical problems to be solved in the utility model is for the deficiencies in the prior art, propose a kind of production and processing more convenient, more easily realize field and remove and install, the cryogenic swivel of sealing reliability can be ensured.
The technical problems to be solved in the utility model is achieved through the following technical solutions, a kind of cryogenic swivel, comprise inner ring and be sleeved on the outer ring on inner ring, lower flange is fixedly connected with in the below of inner ring, upper flange is provided with above inner ring, upper flange and outer ring are fixedly connected, and are characterized in: between upper flange and inner ring, be provided with the active sealing device be inlaid on upper flange, are provided with the static seal device be inlaid on lower flange between inner ring and lower flange, be provided with upper and lower two steel ball rolling channels between the outer wall of described inner ring and the inwall of outer ring, some rollers realizing the independent rotation of inside and outside circle are installed in steel ball rolling channel, described inner ring is provided with the nitrogen purge passage purging steel ball rolling channel, in above upper steel ball rolling channel, ring outer wall has the upper steel ball rolling channel blow valve port communicated with nitrogen purge passage, in below lower steel ball rolling channel, ring outer wall has the lower steel ball rolling channel blow valve port communicated with nitrogen purge passage, upper, nitrogen circulation passage is provided with between lower steel ball rolling channel, described lower flange is provided with the nitrogen inlet duct joint communicated with nitrogen purge passage, upper flange is provided with nitrogen steam outlet pipe joint, outer ring is provided with the communicating passage being communicated with nitrogen circulation passage and nitrogen steam outlet pipe joint.
The technical problems to be solved in the utility model can also be come to realize further by the following technical programs, between the inner side inner ring and upper flange of upper steel ball rolling channel blow valve port, be provided with the secondary seal be inlaid on inner ring, between the outer ring, outside and upper flange of upper steel ball rolling channel blow valve port, be provided with the upper-end surface seal arrangement be inlaid on outer ring.
The technical problems to be solved in the utility model can also be come to realize further by the following technical programs, is provided with the nitrogen gas seal equipment of steel ball rolling channel blow valve port under sealing between the upper-end surface and Internal and external cycle of lower flange.
Compared with prior art, inner ring is fixedly connected with lower flange by the utility model, upper flange and outer ring are fixedly connected, like this, not needing to dismantle inside and outside circle when changing nitrogen gas seal equipment, only lower flange need be unclamped the replacing can carrying out nitrogen gas seal equipment, achieve field stripping and change, do not need integral demounting, solve the problem that nitrogen gas seal equipment is installed, dismounting is inconvenient; Utilize the upper steel ball rolling channel blow valve port be arranged on above steel ball rolling channel and the lower steel ball rolling channel blow valve port be arranged on below lower steel ball rolling channel, outer ring is entered after making nitrogen import raceway centre from the both sides up and down of two steel ball rolling channels, thus it is more thorough to make nitrogen in steel ball rolling channel purge displacement, has thoroughly stopped the phenomenon of roller frozen.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
A kind of cryogenic swivel, the outer ring 5 comprising inner ring 4 and be sleeved on inner ring, lower flange 12 is fixedly connected with in the below of inner ring, upper flange 10 is provided with above inner ring, upper flange and outer ring are fixedly connected, between upper flange and inner ring, be provided with the active sealing device 8 be inlaid on upper flange, between inner ring and lower flange, be provided with the static seal device 2 be inlaid on lower flange 12, be provided with upper and lower two steel ball rolling channels 6 between the outer wall of described inner ring and the inwall of outer ring, some rollers realizing the independent rotation of inside and outside circle are installed in steel ball rolling channel, described inner ring is provided with the nitrogen purge passage 11 purging steel ball rolling channel, in above upper steel ball rolling channel, ring outer wall has the upper steel ball rolling channel blow valve port communicated with nitrogen purge passage 11, in below lower steel ball rolling channel, ring outer wall has the lower steel ball rolling channel blow valve port communicated with nitrogen purge passage, upper, nitrogen circulation passage is provided with between lower steel ball rolling channel, described lower flange is provided with the nitrogen inlet duct joint 1 communicated with nitrogen purge passage, upper flange is provided with nitrogen steam outlet pipe joint 9, outer ring is provided with the communicating passage being communicated with nitrogen circulation passage and nitrogen steam outlet pipe joint.Described active sealing device is realizing active sealing circle, and static seal device is static sealing ring.Upper flange and outer ring screw are connected to become upper rotary component, and lower flange and inner ring screw are connected to become lower rotary component, and upper rotary component can rotate relatively with lower rotary component.Described nitrogen inlet duct joint also can as air outlet, simultaneously, the nitrogen steam outlet pipe joint of upper flange will as suction port with the use of, described air outlet and air outlet are all axially arranged, like this, change original radial direction into axial connection, reduce nitrogen pipeline and bending required spatial position is installed, make nitrogen pipeline more press close to fluid line, make it to be placed in inner side always, not easily collided, avoid accidentally destroying during operation.The utility model nitrogen enters outer ring after importing raceway centre from the both sides up and down of two steel ball rolling channels, thus it is more thorough to make nitrogen in steel ball rolling channel purge displacement, has thoroughly stopped the phenomenon of roller frozen.
Between the inner side inner ring and upper flange of upper steel ball rolling channel blow valve port, be provided with the secondary seal 7 be inlaid on inner ring, between the outer ring, outside and upper flange of upper steel ball rolling channel blow valve port, be provided with the upper-end surface seal arrangement be inlaid on outer ring.The nitrogen gas seal equipment 3 of steel ball rolling channel blow valve port under sealing is installed between the upper-end surface and Internal and external cycle of lower flange, nitrogen gas seal equipment 3 is nitrogen-sealed circle, bottom, described outer ring is to being arranged with step, nitrogen-sealed circle upper, outside all contacts with step and seals, contact with lower flange upper-end surface on the downside of nitrogen-sealed circle and seal, the inner side of nitrogen-sealed circle contacts with inner ring and seals, like this, step set by outer ring effectively can avoid nitrogen-sealed loop product water freezing, nitrogen-sealed circle is not easy ponding, thus rainy day entrucking can not be frozen, also inner ring can not be caused, outer ring freezes to rotate.Form space between outside described lower flange upper-end surface, inner ring and on the downside of outer ring, nitrogen-sealed circle is arranged on gap, like this, only lower flange need being unclamped the replacing can carrying out nitrogen-sealed circle, without the need to carrying out integral demounting, can realize spot replace.
Claims (3)
1. a cryogenic swivel, comprise inner ring and be sleeved on the outer ring on inner ring, lower flange is fixedly connected with in the below of inner ring, upper flange is provided with above inner ring, upper flange and outer ring are fixedly connected, it is characterized in that: between upper flange and inner ring, be provided with the active sealing device be inlaid on upper flange, between inner ring and lower flange, be provided with the static seal device be inlaid on lower flange, be provided with upper and lower two steel ball rolling channels between the outer wall of described inner ring and the inwall of outer ring, some rollers realizing the independent rotation of inside and outside circle are installed in steel ball rolling channel, described inner ring is provided with the nitrogen purge passage purging steel ball rolling channel, in above upper steel ball rolling channel, ring outer wall has the upper steel ball rolling channel blow valve port communicated with nitrogen purge passage, in below lower steel ball rolling channel, ring outer wall has the lower steel ball rolling channel blow valve port communicated with nitrogen purge passage, upper, nitrogen circulation passage is provided with between lower steel ball rolling channel, described lower flange is provided with the nitrogen inlet duct joint communicated with nitrogen purge passage, upper flange is provided with nitrogen steam outlet pipe joint, outer ring is provided with the communicating passage being communicated with nitrogen circulation passage and nitrogen steam outlet pipe joint.
2. cryogenic swivel according to claim 1, it is characterized in that: between the inner side inner ring and upper flange of upper steel ball rolling channel blow valve port, be provided with the secondary seal be inlaid on inner ring, between the outer ring, outside and upper flange of upper steel ball rolling channel blow valve port, be provided with the upper-end surface seal arrangement be inlaid on outer ring.
3. cryogenic swivel according to claim 1, is characterized in that: the nitrogen gas seal equipment being provided with steel ball rolling channel blow valve port under sealing between the upper-end surface and Internal and external cycle of lower flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520922492.XU CN205136894U (en) | 2015-11-18 | 2015-11-18 | Low temperature rotary joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520922492.XU CN205136894U (en) | 2015-11-18 | 2015-11-18 | Low temperature rotary joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205136894U true CN205136894U (en) | 2016-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520922492.XU Active CN205136894U (en) | 2015-11-18 | 2015-11-18 | Low temperature rotary joint |
Country Status (1)
| Country | Link |
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| CN (1) | CN205136894U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105697909A (en) * | 2016-04-19 | 2016-06-22 | 北京航天发射技术研究所 | Low-temperature rotation connector |
| CN105805448A (en) * | 2016-04-08 | 2016-07-27 | 黄永怀 | Drainage pipeline connector for aluminum pipe full-automatic ultrasonic cleaning machine |
| CN110206950A (en) * | 2019-06-28 | 2019-09-06 | 连云港市拓普科技发展有限公司 | LNG handling single-chamber type rotary joint |
| CN110939803A (en) * | 2019-12-17 | 2020-03-31 | 刘永海 | Pipeline fixing device of removable filter plate based on airtight principle |
| RU2776400C1 (en) * | 2021-08-09 | 2022-07-19 | Общество с ограниченной ответственностью "Газпром 335" | Swivel joint |
| WO2023116665A1 (en) * | 2021-12-21 | 2023-06-29 | 中国石油化工股份有限公司 | High-pressure gas filling/unloading system |
-
2015
- 2015-11-18 CN CN201520922492.XU patent/CN205136894U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805448A (en) * | 2016-04-08 | 2016-07-27 | 黄永怀 | Drainage pipeline connector for aluminum pipe full-automatic ultrasonic cleaning machine |
| CN105697909A (en) * | 2016-04-19 | 2016-06-22 | 北京航天发射技术研究所 | Low-temperature rotation connector |
| CN105697909B (en) * | 2016-04-19 | 2019-10-11 | 北京航天发射技术研究所 | A kind of cryogenic swivel |
| CN110206950A (en) * | 2019-06-28 | 2019-09-06 | 连云港市拓普科技发展有限公司 | LNG handling single-chamber type rotary joint |
| CN110206950B (en) * | 2019-06-28 | 2024-05-10 | 连云港市拓普科技发展有限公司 | Single-cavity rotary joint for LNG loading and unloading |
| CN110939803A (en) * | 2019-12-17 | 2020-03-31 | 刘永海 | Pipeline fixing device of removable filter plate based on airtight principle |
| RU2776400C1 (en) * | 2021-08-09 | 2022-07-19 | Общество с ограниченной ответственностью "Газпром 335" | Swivel joint |
| WO2023116665A1 (en) * | 2021-12-21 | 2023-06-29 | 中国石油化工股份有限公司 | High-pressure gas filling/unloading system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |