CN211010311U - L NG loading and unloading are with single chamber formula rotary joint - Google Patents
L NG loading and unloading are with single chamber formula rotary joint Download PDFInfo
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- CN211010311U CN211010311U CN201920995689.4U CN201920995689U CN211010311U CN 211010311 U CN211010311 U CN 211010311U CN 201920995689 U CN201920995689 U CN 201920995689U CN 211010311 U CN211010311 U CN 211010311U
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Abstract
A L NG loading and unloading single-cavity rotary joint comprises an outer rotary part and an inner rotary part, wherein the outer rotary part comprises an outer ring flange and an outer ring, the inner rotary part comprises an inner ring flange and an inner ring, the outer rotary part and the inner rotary part are connected through a double-roller structure, a cavity between the outer wall of the inner ring and the inner wall of the outer ring is provided with a nitrogen purging channel, the outer ring flange is provided with a nitrogen inlet, the inner ring flange is provided with a nitrogen outlet, the upper end face of the inner ring flange is rotatably connected with the lower end face of the outer ring, a nitrogen sealing mechanism is arranged at the connecting part, the lower part of the nitrogen purging channel is provided with an annular buffer gap close to the upper end face of the inner ring flange, an upper sealing mechanism is arranged between the upper end face of the inner ring and the lower end face of the outer ring flange, and an outer sealing mechanism is arranged between the upper end face of the outer ring flange and the lower end face of the inner ring flange.
Description
Technical Field
The utility model relates to a petrochemical industry fluid handling equipment field, especially a L NG loading and unloading are with single-chamber formula rotary joint.
Background
The land storage and transportation loading and unloading of L NG low-temperature fluid mainly depends on a L NG loading and unloading arm to realize a hard connection loading and unloading function, a core component of a L NG loading and unloading arm is a rotary joint, the low-temperature rotary joint is used as the most important core component of the L NG loading and unloading arm to bear relevant actions of the loading and unloading arm during loading and unloading operation, the prior art in the domestic market at present mainly adopts components and sealing parts, wherein two side flanges are adopted, an inner ring and an outer ring are connected through bearing balls in the middle, a nitrogen replacement purging structure is arranged, and whether the structural arrangement of the rotary joint reasonably influences the operating performance and the sealing performance of the L NG rotary joint and the L NG loading and unloading.
Disclosure of Invention
The utility model aims to solve the technical problem that to prior art not enough, provide a production and processing is more convenient, change on-the-spot dismantlement installation, nitrogen gas sweep more thoroughly, the more reliable L NG loading and unloading of leakproofness are with single chamber rotary joint.
The technical problem to be solved by the utility model is realized by the following technical proposal, a L NG loading and unloading single-cavity rotary joint, which comprises an outer rotary part and an inner rotary part, wherein the outer rotary part comprises an outer ring flange and an outer ring, the inner rotary part comprises an inner ring flange and an inner ring, the outer rotary part and the inner rotary part are connected by a double-raceway structure,
the method is characterized in that:
a cavity between the outer wall of the inner ring and the inner wall of the outer ring is provided with a nitrogen purging channel, the double-roller structure is arranged in the nitrogen purging channel and comprises two annular steel column roller paths which are arranged side by side, a plurality of bearing balls capable of realizing independent rotation of the inner ring and the outer ring are arranged in the annular steel ball roller paths, and the gap between the outer wall of the inner ring and the inner wall of the outer ring is 1mm-2mm smaller than the diameter of the bearing balls;
the outer circular surface of the outer ring flange is provided with a nitrogen inlet, the outer ring flange is internally provided with an air inlet transmission channel communicated with the nitrogen inlet, the outer circular surface of the inner ring flange is provided with a nitrogen outlet, and the inner ring flange is internally provided with an air outlet transmission channel communicated with the nitrogen outlet; the inlet transmission channel is communicated with the nitrogen purging channel through an inlet transition channel, the outlet transmission channel is communicated with the nitrogen purging channel through an outlet transition channel, the inlet transition channel is arranged close to the lower end face of the outer ring flange, and the outlet transition channel is arranged close to the upper end face of the inner ring flange;
the upper end face of the inner ring flange is rotatably connected with the lower end face of the outer ring, a nitrogen sealing mechanism is arranged at the connection position, the nitrogen sealing mechanism comprises a groove with a downward opening on the lower end face of the outer ring, a nitrogen sealing ring is arranged in the groove, an annular buffer gap for reducing the pressure of the nitrogen sealing ring is arranged on the upper end face of the lower part of the nitrogen purging channel, which is close to the inner ring flange, and the air outlet transition channel is arranged on the inner side of the annular buffer gap and is directly communicated with the nitrogen purging channel;
an upper sealing mechanism is arranged between the upper end face of the inner ring and the lower end face of the outer ring flange, the upper sealing mechanism comprises a main sealing groove which is arranged on the upper end face of the inner ring and has an upward opening, the main sealing groove is arranged close to the fluid channel, and a main sealing ring is arranged in the main sealing groove; an auxiliary sealing groove with an upward opening is formed in the upper end face of the inner ring on the outer side of the main sealing groove, and an auxiliary sealing ring is installed in the auxiliary sealing groove;
an outer sealing mechanism is arranged between the upper end face of the outer ring and the lower end face of the outer ring flange, the outer sealing mechanism comprises an O-shaped sealing groove which is arranged on the outer side of the air inlet transition passage and provided with an upward opening on the upper end face of the outer ring, and an O-shaped sealing ring is arranged in the O-shaped sealing groove;
and a lower sealing mechanism is arranged between the lower end surface of the inner ring and the upper end surface of the inner ring flange, the lower sealing mechanism comprises a lower sealing groove which is arranged on the lower end surface of the inner ring and has a downward opening, and a static sealing ring is arranged in the lower sealing groove.
The technical problem to be solved by the utility model can be further realized by the following technical scheme, and the width of the annular buffer gap is 1mm-2 mm.
The utility model discloses the technical problem that will solve can also further realize through following technical scheme, and nitrogen gas import and nitrogen gas export are all connected the right angle card and are cup jointed the head.
The utility model discloses the technical problem that will solve can also further realize through following technical scheme, and main seal slot is equipped with and is used for blockking the tang of main sealing washer internal slip.
The utility model discloses the technical problem that will solve can also further realize through following technical scheme, the last sealed face of nitrogen gas sealing washer and the groove top contact of recess, the last end face contact of the lower sealing face of nitrogen gas sealing washer and inner circle flange, the outside of nitrogen gas sealing washer and the cell wall contact of recess.
The utility model discloses the technical problem that will solve can also further realize through following technical scheme, and outer lane flange, inner circle flange carry out welded connection with the corresponding pipeline of loading and unloading arm respectively.
Compared with the prior art, the nitrogen sealing ring is arranged between the inner ring flange and the outer ring, so that the inner ring flange and the outer ring do not need to be disassembled during replacement, the nitrogen sealing ring can be replaced only by loosening the inner ring flange, the site disassembly and replacement are realized, the integral disassembly is not needed, and the problem of inconvenient installation and disassembly of the nitrogen sealing ring is solved; the nitrogen sealing ring is arranged on the lower end surface of the outer ring in a built-in mode, so that water and dust are not easy to accumulate at the nitrogen sealing ring, the possibility of material aging caused by dust accumulation is reduced, and the phenomenon that the vehicle is loaded in rainy seasons, and the phenomenon that the inner ring and the outer ring are frozen is avoided; the clearance between the inner ring and the outer ring is large, so that part of impure nitrogen can pass through, and the cleaning can be conveniently carried out if the impurities are accumulated on the raceway. The nitrogen gas circulation volume and the velocity of flow can be guaranteed to great nitrogen gas passageway for nitrogen gas separates cold, the air replacement is faster in the passageway, reduces cold transmission, can be better reach carry out nitrogen gas circulation protection's purpose to rotary joint.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The following further describes embodiments of the present invention in order to facilitate further understanding of the present invention by those skilled in the art, and does not constitute a limitation to the right thereof.
A L NG loading and unloading single-cavity rotary joint comprises an outer rotary part and an inner rotary part, wherein the outer rotary part comprises an outer ring flange 15 and an outer ring 8, the outer ring flange 15 and the outer ring 8 are connected through a connecting screw 3, the inner rotary part comprises an inner ring flange 1 and an inner ring 9, the inner ring flange 1 and the inner ring 9 are connected through the connecting screw 3, the outer rotary part and the inner rotary part are connected by adopting a double-roller structure,
the cavity between the outer wall of the inner ring 9 and the inner wall of the outer ring 8 is a nitrogen purging channel 17, the double-roller structure is arranged in the nitrogen purging channel 17 and comprises two annular steel column roller paths which are arranged side by side, and a plurality of bearing balls 7 which can realize the independent rotation of the inner ring 9 and the outer ring 8 are arranged in the annular steel column roller paths. And a screw hole for the bearing ball 7 to enter the annular steel column raceway is formed in the outer circular surface of the outer ring 8, a plug screw 6 is arranged in the screw hole, and a plug screw sealing ring 5 is arranged between the plug screw 6 and the outer ring 8. The clearance between the outer wall of the inner ring 9 and the inner wall of the outer ring 8 is 1mm to 2mm, preferably 1mm, smaller than the diameter of the bearing balls 7.
The outer circular surface of the outer ring flange 15 is provided with a nitrogen inlet, the outer ring flange 15 is provided with an air inlet transmission channel communicated with the nitrogen inlet, the outer circular surface of the inner ring flange 1 is provided with a nitrogen outlet, and the inner ring flange 1 is provided with an air outlet transmission channel 19 communicated with the nitrogen outlet; the air inlet transmission channel is communicated with the nitrogen purging channel 17 through an air inlet transition channel 16, the air outlet transmission channel 20 is communicated with the nitrogen purging channel 17 through an air outlet transition channel 19, the air inlet transition channel 16 is arranged close to the lower end face of the outer ring flange 15, and the air outlet transition channel 19 is arranged close to the upper end face of the inner ring flange 1.
The up end of inner circle flange 1 and the rotatory looks of the lower terminal surface of outer lane 8 meet, are equipped with nitrogen gas sealing mechanism in the department of meeting, nitrogen gas sealing mechanism is including setting up the recess down at the lower terminal surface opening of outer lane 8, installation nitrogen gas sealing washer 4 in the recess, the up end that nitrogen gas sweeps passageway 17 lower part is close to inner circle flange 1 is equipped with the annular buffer clearance 18 that is used for alleviateing nitrogen gas sealing washer 4 pressure, the transition passageway 19 of giving vent to anger sets up in the inboard of above-mentioned annular buffer clearance 18 and sweeps passageway 17 direct intercommunication with nitrogen gas.
An upper sealing mechanism is arranged between the upper end face of the inner ring 9 and the lower end face of the outer ring flange 15, the upper sealing mechanism comprises a main sealing groove which is arranged on the upper end face of the inner ring 9 and has an upward opening, the main sealing groove is arranged close to the fluid channel, and a main sealing ring 14 is arranged in the main sealing groove; and a secondary sealing groove with an upward opening is formed in the upper end surface of the inner ring outside the primary sealing groove, and a secondary sealing ring 13 is arranged in the secondary groove.
An outer sealing mechanism is arranged between the upper end face of the outer ring 8 and the lower end face of the outer ring flange 15, the outer sealing mechanism comprises an O-shaped sealing groove which is arranged on the outer side of the air inlet transition channel 16 and is provided with an upward opening on the upper end face of the outer ring 8, and an O-shaped sealing ring 10 is arranged in the O-shaped sealing groove.
And a lower sealing mechanism is arranged between the lower end surface of the inner ring 9 and the upper end surface of the inner ring flange 1, the lower sealing mechanism comprises a lower sealing groove which is arranged on the lower end surface of the inner ring 9 and has a downward opening, and a static sealing ring 2 is arranged in the lower sealing groove.
The width of the annular buffer gap 18 is 1mm to 2mm, preferably 1 mm. The gas resistance is increased, the load-bearing capacity of the nitrogen sealing ring is reduced, and the nitrogen flow at the nitrogen outlet can be increased.
The nitrogen inlet and the nitrogen outlet are both connected with the right-angle clamping sleeve joint 12, so that the installation direction and the position of a nitrogen pipeline are changed, and the nitrogen pipeline is more stable and effective in sweeping and protecting the rotary joint. The joint of the right-angle clamping sleeve joint 12 and the outer ring flange is provided with a clamping sleeve joint sealing gasket 11.
The main sealing groove is provided with a spigot used for blocking the sliding inside of the main sealing ring 14, and the sealing ring is prevented from sliding into a pipeline after being deformed and shrunk under the state of rapid cooling and rapid heating, so that the sealing is disabled.
The upper sealing surface of the nitrogen sealing ring 4 is contacted with the groove top of the groove, the lower sealing surface of the nitrogen sealing ring is contacted with the upper end surface of the inner ring flange, and the outer side of the nitrogen sealing ring is contacted with the groove wall of the groove.
And the outer ring flange 15 and the inner ring flange 1 are respectively welded and connected with pipelines corresponding to the loading and unloading arms.
Claims (6)
1. A L NG single-cavity rotary joint for loading and unloading comprises an outer rotary part and an inner rotary part, wherein the outer rotary part comprises an outer ring flange and an outer ring, the inner rotary part comprises an inner ring flange and an inner ring, the outer rotary part and the inner rotary part are connected by adopting a double-roller structure,
the method is characterized in that:
a cavity between the outer wall of the inner ring and the inner wall of the outer ring is provided with a nitrogen purging channel, the double-roller structure is arranged in the nitrogen purging channel and comprises two annular steel column roller paths which are arranged side by side, a plurality of bearing balls capable of realizing independent rotation of the inner ring and the outer ring are arranged in the annular steel ball roller paths, and the gap between the outer wall of the inner ring and the inner wall of the outer ring is 1mm-2mm smaller than the diameter of the bearing balls;
the outer circular surface of the outer ring flange is provided with a nitrogen inlet, the outer ring flange is internally provided with an air inlet transmission channel communicated with the nitrogen inlet, the outer circular surface of the inner ring flange is provided with a nitrogen outlet, and the inner ring flange is internally provided with an air outlet transmission channel communicated with the nitrogen outlet; the inlet transmission channel is communicated with the nitrogen purging channel through an inlet transition channel, the outlet transmission channel is communicated with the nitrogen purging channel through an outlet transition channel, the inlet transition channel is arranged close to the lower end face of the outer ring flange, and the outlet transition channel is arranged close to the upper end face of the inner ring flange;
the upper end face of the inner ring flange is rotatably connected with the lower end face of the outer ring, a nitrogen sealing mechanism is arranged at the connection position, the nitrogen sealing mechanism comprises a groove with a downward opening on the lower end face of the outer ring, a nitrogen sealing ring is arranged in the groove, an annular buffer gap for reducing the pressure of the nitrogen sealing ring is arranged on the upper end face of the lower part of the nitrogen purging channel, which is close to the inner ring flange, and the air outlet transition channel is arranged on the inner side of the annular buffer gap and is directly communicated with the nitrogen purging channel; an upper sealing mechanism is arranged between the upper end face of the inner ring and the lower end face of the outer ring flange, the upper sealing mechanism comprises a main sealing groove which is arranged on the upper end face of the inner ring and has an upward opening, the main sealing groove is arranged close to the fluid channel, and a main sealing ring is arranged in the main sealing groove; an auxiliary sealing groove with an upward opening is formed in the upper end face of the inner ring on the outer side of the main sealing groove, and an auxiliary sealing ring is installed in the auxiliary sealing groove;
an outer sealing mechanism is arranged between the upper end face of the outer ring and the lower end face of the outer ring flange, the outer sealing mechanism comprises an O-shaped sealing groove which is arranged on the outer side of the air inlet transition passage and provided with an upward opening on the upper end face of the outer ring, and an O-shaped sealing ring is arranged in the O-shaped sealing groove;
and a lower sealing mechanism is arranged between the lower end surface of the inner ring and the upper end surface of the inner ring flange, the lower sealing mechanism comprises a lower sealing groove which is arranged on the lower end surface of the inner ring and has a downward opening, and a static sealing ring is arranged in the lower sealing groove.
2. The L NG single-chamber rotary joint for loading and unloading goods as claimed in claim 1, wherein the annular buffering gap has a width of 1mm-2 mm.
3. The L NG single-cavity rotary joint for loading and unloading goods as claimed in claim 1, wherein the nitrogen inlet and the nitrogen outlet are both connected to a right-angle bayonet joint.
4. The L NG single-chamber swivel joint for loading and unloading according to claim 1, wherein the primary sealing groove has a spigot for blocking the primary seal ring from sliding inward.
5. The L NG single-cavity rotary joint for loading and unloading goods as claimed in claim 1, wherein the upper sealing surface of the nitrogen sealing ring is in contact with the top of the groove, the lower sealing surface of the nitrogen sealing ring is in contact with the upper end surface of the inner ring flange, and the outer side of the nitrogen sealing ring is in contact with the wall of the groove.
6. The L NG single-cavity rotary joint for loading and unloading, according to claim 1, wherein the outer ring flange and the inner ring flange are welded to the pipes corresponding to the loading and unloading arms, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920995689.4U CN211010311U8 (en) | 2019-06-28 | 2019-06-28 | Single-cavity type rotary joint for LNG loading and unloading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920995689.4U CN211010311U8 (en) | 2019-06-28 | 2019-06-28 | Single-cavity type rotary joint for LNG loading and unloading |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN211010311U true CN211010311U (en) | 2020-07-14 |
| CN211010311U8 CN211010311U8 (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920995689.4U Active CN211010311U8 (en) | 2019-06-28 | 2019-06-28 | Single-cavity type rotary joint for LNG loading and unloading |
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| CN (1) | CN211010311U8 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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2019
- 2019-06-28 CN CN201920995689.4U patent/CN211010311U8/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN211010311U8 (en) | 2021-06-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CU01 | Correction of utility model | ||
| CU01 | Correction of utility model |
Correction item: Inventor Correct: Rui Feng|Wu Xinglou False: Rui Feng|Wu Xinglou Number: 29-01 Page: The title page Volume: 36 Correction item: Inventor Correct: Rui Feng|Wu Xinglou False: Rui Feng|Wu Xinglou Number: 29-01 Volume: 36 |