CN209818979U - Anti-freezing low-temperature fluid rotary joint - Google Patents
Anti-freezing low-temperature fluid rotary joint Download PDFInfo
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- CN209818979U CN209818979U CN201920618284.9U CN201920618284U CN209818979U CN 209818979 U CN209818979 U CN 209818979U CN 201920618284 U CN201920618284 U CN 201920618284U CN 209818979 U CN209818979 U CN 209818979U
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Abstract
The utility model belongs to cryogenic fluid equipment field, concretely relates to anti-freezing cryogenic fluid rotary joint. The technical scheme of the utility model as follows: the anti-freezing low-temperature fluid rotary joint comprises an end face sealing connecting flange, a shell, a pan head pipe shaft and a radial bearing, wherein the end face sealing connecting flange is detachably connected to the upper end of the shell, and the radial bearing is arranged between the pan head pipe shaft and the shell; the end face sealing connection flange, the shell, the coiled head pipe shaft and the shell end face seal, the pipe shaft rotary seal, the circular ring seal ring, the end face inner rotary seal and the end face outer rotary seal between the coiled head pipe shaft and the shell form a seal cavity, and the radial bearing is arranged in the seal cavity. The utility model discloses well casing is whole with coiled hair hollow shaft, and simple structure adopts bearing structure, and the rotation resistance is little, longe-lived.
Description
Technical Field
The utility model relates to a cryogenic fluid equipment field especially relates to an anti-freezing cryogenic fluid rotary joint.
Background
The low-temperature fluid rotary joint is a key part for manufacturing loading and unloading arms for low-temperature fluids such as liquid nitrogen, liquid oxygen, liquefied natural gas and the like, is used for connecting pipelines and bent pipes, and can rotate without leakage or freezing through the low-temperature fluids. However, the existing cryogenic fluid rotary joints generally have the following disadvantages: in order to prevent the raceway steel balls from freezing, during the working period of the low-temperature rotary joint, nitrogen is required to continuously purge the rolling body part in the rotary joint, and nitrogen supply equipment and a pipeline system are required to be arranged, so that the investment cost of the equipment is increased, and the nitrogen is wasted; the low-temperature rotary joint is internally provided with a nitrogen channel, so that the rotary joint is complex in structure and easy to break down. The ball track steel ball structure is adopted, so that the rotating resistance is large, the service life is short, and the disassembly, assembly and maintenance are not convenient.
SUMMERY OF THE UTILITY MODEL
The utility model provides an anti-freezing cryogenic fluid rotary joint, sealed intracavity are all arranged in to all bearings, thereby avoid having the air of vapor and rolling element contact to prevent to freeze, and nitrogen-free sweeping system has saved nitrogen gas and supply apparatus, pipeline.
The technical scheme of the utility model as follows:
the anti-freezing low-temperature fluid rotary joint comprises an end face sealing connecting flange, a shell, a pan head pipe shaft and a radial bearing, wherein the end face sealing connecting flange is detachably connected to the upper end of the shell, and the radial bearing is arranged between the pan head pipe shaft and the shell; the end face sealing connection flange, the shell, the pan head pipe shaft and the shell end face seal, the pipe shaft rotary seal, the circular sealing ring, the end face inner rotary seal and the end face outer rotary seal between the pan head pipe shaft and the shell form a sealing cavity, the radial bearing is arranged in the sealing cavity, and therefore air with water vapor is prevented from contacting with the rolling body and being prevented from freezing.
Furthermore, the anti-freezing low-temperature fluid rotary joint is characterized in that a semicircular snap ring is coaxially arranged in an annular groove in the middle section of the coiled head tubular shaft, a semicircular snap ring positioning sleeve is sleeved outside the semicircular snap ring, a bearing positioning sleeve is arranged between the end face sealing connecting flange and the radial bearing outer ring, and the bearing positioning sleeve is embedded in the inner hole of the shell.
Furthermore, the anti-freezing low-temperature fluid rotary joint is characterized in that a thrust bearing is arranged between the semicircular clamping ring and the bottom of the shell, a shaft ring of the thrust bearing is sleeved on a pan head tubular shaft, the upper end face of the thrust bearing is limited at the lower end face of the semicircular clamping ring, a seat ring of the thrust bearing is embedded at the bottom of the shell, and the thrust bearing is arranged in the sealing cavity.
Furthermore, the quantity of the radial bearings of the anti-freezing cryogenic fluid rotary joint is at least one group, and the radial bearings are arranged between the shell and the coiled head pipe shaft, so that the shell and the coiled head pipe shaft form rolling connection; the upper end face of the inner ring of the radial bearing on the upper portion is limited on the lower end face of the pan head tubular shaft, the lower end face of the inner ring of the radial bearing on the lower portion is limited on the upper end face of the semicircular clamping ring, and the upper end face of the outer ring of the radial bearing on the upper portion is limited on the lower end face of the bearing positioning sleeve.
Furthermore, the anti-freezing low-temperature fluid rotary joint is characterized in that an annular groove is formed in the upper end face of the coiled head tubular shaft, and an end face rotary sealing check ring is arranged in the annular groove.
Further, an end face internal rotation seal and/or an end face external rotation seal are arranged between the end face seal connecting flange and the pan head tubular shaft, the end face internal rotation seal is embedded in an inner hole of the end face rotation seal retainer ring, and the end face external rotation seal is embedded in an inner hole of the bearing positioning sleeve.
Furthermore, the anti-freezing low-temperature fluid rotary joint is characterized in that at least one pipe shaft rotary seal is coaxially sleeved on the coiled head pipe shaft between the coiled head pipe shaft and the shell; a tubular shaft rotary sealing pressing ring is arranged in a groove at the bottom of the shell; a dustproof ring frame flange is arranged in an annular groove at the lower end of the shell, and a tubular shaft dustproof ring is arranged in an inner hole of the dustproof ring frame flange.
Furthermore, the anti-freezing cryogenic fluid rotary joint, the end face sealing connecting flange and the pan head tubular shaft are provided with fluid channel central holes which are mutually communicated, and welding interfaces are respectively arranged at the upper end part of the end face sealing connecting flange and the lower end part of the pan head tubular shaft; the lower end face of the end face sealing connecting flange and the upper end face of the pan head tubular shaft are respectively provided with a stepped hole which is coaxial with a central hole of the flange at a position close to the central hole, and a circular sealing ring is embedded in the stepped holes.
Furthermore, a shell end face seal is arranged between the upper end of the shell and the end face seal connecting flange of the anti-freezing low-temperature fluid rotary joint.
Furthermore, the end surface sealing connecting flange of the anti-icing low-temperature fluid rotary joint is connected to the upper end of the shell by a second fastening piece; the dustproof ring frame flange is connected to the lower end face of the shell through a fastener.
The utility model has the advantages that: adopt the utility model discloses an anti-freezing cryogenic fluid rotary joint has solved current cryogenic fluid rotary joint and for preventing to freeze must constantly sweep the problem of rolling element with nitrogen gas, does not have nitrogen gas purging system, can work at the occasion of no nitrogen source, has saved nitrogen gas and supply apparatus, pipe-line system thereof. The bearing structure is adopted to replace a steel ball pipeline structure, so that the rotating resistance is small, and the service life is long. The shell and the pan head rotating shaft are integrated, and the structure is simple.
Drawings
Figure 1 is a schematic structural view of a first embodiment of a rotary joint for an anti-freezing cryogenic fluid;
figure 2 is a schematic structural view of a second embodiment of a rotary joint for an anti-freezing cryogenic fluid;
figure 3 is a schematic structural view of a third embodiment of a rotary joint for an anti-freezing cryogenic fluid;
figure 4 is a schematic structural view of a fourth embodiment of a rotary joint for an anti-freezing cryogenic fluid;
figure 5 is a schematic structural view of a fifth embodiment of a rotary joint for an anti-freezing cryogenic fluid;
figure 6 is a schematic structural view of a sixth embodiment of a rotary joint for an anti-freezing cryogenic fluid;
FIG. 7 is a schematic view of an end-face sealing attachment flange configuration;
FIG. 8 is a schematic view of the housing construction;
fig. 9 is a schematic structural view of the pan head tube shaft.
Detailed Description
Example 1
As shown in fig. 1, the anti-freezing cryogenic fluid rotary joint comprises an end face sealing connecting flange 18, a shell 8, a pan head tubular shaft 1, a radial bearing 11 and a thrust bearing 7, wherein the end face sealing connecting flange 18 is detachably connected to the upper end of the shell 8, and the radial bearing 11 is arranged between the pan head tubular shaft 1 and the shell 8; the end face sealing connecting flange 18, the shell 8, the pan head pipe shaft 1 and a shell end face seal 17 between the pan head pipe shaft 1, the pan head pipe shaft rotary seal 6, the annular seal ring 16, the end face inner rotary seal 15 and the end face outer rotary seal 13 form a seal cavity, all bearings 7 are arranged in the seal cavity, and air with water vapor is prevented from contacting with the rolling body, so that freezing is prevented.
A semicircular clamping ring 9 is coaxially arranged in an annular groove in the middle section of the pan head tubular shaft 1, a semicircular clamping ring positioning sleeve 10 is sleeved outside the semicircular clamping ring 9, a bearing positioning sleeve 12 is arranged between an end face sealing connecting flange 18 and the outer ring of a radial bearing 11, and the bearing positioning sleeve 12 is embedded in an inner hole of a shell 8.
The number of the radial bearings 11 is three, and the radial bearings 11 are arranged between the shell 8 and the pan head tubular shaft 1, so that the shell 8 and the pan head tubular shaft 1 form rolling connection; the upper end face of the inner ring of the upper radial bearing 11 is limited on the lower end face of the pan head tubular shaft 1, the lower end face of the inner ring of the lower radial bearing 11 is limited on the upper end face of the semicircular snap ring 9, and the upper end face of the outer ring of the upper radial bearing 11 is limited on the lower end face of the bearing positioning sleeve 12.
Set up thrust bearing 7 between semicircle snap ring 9 and the 8 bottoms of casing, thrust bearing 7's ring sleeve is on coiled hair hollow shaft 1, and its up end is spacing in the lower terminal surface of semicircle snap ring 9, thrust bearing 7's seat circle is inlayed the 8 bottoms of casing.
An annular groove is formed in the upper end face of the pan head tubular shaft 1, and an end face internal rotation sealing retainer ring 14 is arranged in the annular groove.
An end face internal rotation seal 15, an end face external rotation seal 13 and a circular sealing ring 16 are arranged between the end face sealing connecting flange 18 and the pan head tubular shaft 1, the end face internal rotation seal 15 is embedded in an inner hole of the end face internal rotation sealing retainer ring 14, and the end face external rotation seal 13 is embedded in an inner hole of the bearing positioning sleeve 12. And a combined sealing groove for placing the end face internal rotation seal 15 and the end face external rotation seal 13 is formed among the end face sealing connecting flange 18, the pan head tubular shaft 1, the bearing positioning sleeve 12 and the end face internal rotation sealing retainer ring 14.
Two coiled pipe shaft rotary seals 6 are coaxially sleeved on the coiled pipe shaft 1 between the coiled pipe shaft 1 and the shell 8; a tubular shaft rotary sealing pressing ring 5 is arranged in a groove at the bottom of the shell 8; and a dustproof ring frame flange 2 is arranged in an annular groove at the lower end of the shell 8, and a tubular shaft dustproof ring 3 is arranged in an inner hole of the dustproof ring frame flange 2.
The end face sealing connecting flange 18 and the pan head tubular shaft 1 are both provided with fluid passage center holes which are communicated with each other, and welding interfaces are respectively arranged at the upper end part of the end face sealing connecting flange 18 and the lower end part of the pan head tubular shaft 1; the lower end face of the end face sealing connecting flange 18 and the upper end face of the pan head tubular shaft 1 are respectively provided with a stepped hole which is coaxial with the central hole of the flange at the position close to the central hole part, and the annular sealing ring 16 is embedded in the stepped holes.
A shell end face sealing ring 17 is arranged between the upper end of the shell 8 and the end face sealing connecting flange 18.
The end face sealing connecting flange 18 is connected to the upper end of the shell 8 through a second fastening piece 19; the dust ring frame flange 2 is connected to the lower end face of the shell 8 through a first fastener 4.
Example 2
As shown in fig. 2, the difference from embodiment 1 is that the radial bearings 11 are two groups, and a positioning ring is provided between the two radial bearings 11.
Example 3
As shown in fig. 3, the difference from embodiment 1 is that the radial bearings 11 are two in number.
Example 4
As shown in fig. 4, the present embodiment is different from embodiment 1 in that only the radial bearing 11 is provided and no thrust bearing is provided.
Example 5
As shown in fig. 5, the difference from embodiment 4 is that the radial bearings 11 are two groups, and a positioning ring is provided between the two radial bearings 11.
Example 6
As shown in fig. 6, the difference from embodiment 4 is that the radial bearings 11 are two in number.
Claims (10)
1. The anti-freezing cryogenic fluid rotary joint is characterized by comprising an end face sealing connecting flange, a shell, a pan head pipe shaft and a radial bearing, wherein the end face sealing connecting flange is detachably connected to the upper end of the shell, and the radial bearing is arranged between the pan head pipe shaft and the shell; the end face sealing connection flange, the shell, the coiled head pipe shaft and the shell end face seal, the pipe shaft rotary seal, the circular ring seal ring, the end face inner rotary seal and the end face outer rotary seal between the coiled head pipe shaft and the shell form a seal cavity, and the radial bearing is arranged in the seal cavity.
2. The anti-freezing cryogenic fluid rotary joint as claimed in claim 1, wherein a semicircular snap ring is coaxially arranged in the annular groove in the middle section of the coiled tubing shaft, a semicircular snap ring locating sleeve is sleeved outside the semicircular snap ring, a bearing locating sleeve is arranged between the end face sealing connecting flange and the radial bearing outer ring, and the bearing locating sleeve is embedded in the inner hole of the shell.
3. The anti-freezing cryogenic fluid rotary joint as claimed in claim 2, wherein a thrust bearing is arranged between the semicircular snap ring and the bottom of the shell, a shaft ring of the thrust bearing is sleeved on a tubular shaft of the pan head, the upper end face of the thrust bearing is limited on the lower end face of the semicircular snap ring, a seat ring of the thrust bearing is embedded at the bottom of the shell, and the thrust bearing is arranged in the sealing cavity.
4. The anti-freezing cryogenic fluid rotary joint according to claim 2, wherein the number of the radial bearings is at least one group, and the radial bearings are arranged between the shell and the coiled pipe shaft, so that the shell and the coiled pipe shaft form a rolling connection; the upper end face of the inner ring of the radial bearing on the upper portion is limited on the lower end face of the pan head tubular shaft, the lower end face of the inner ring of the radial bearing on the lower portion is limited on the upper end face of the semicircular clamping ring, and the upper end face of the outer ring of the radial bearing on the upper portion is limited on the lower end face of the bearing positioning sleeve.
5. The anti-freezing cryogenic fluid rotary joint of claim 1 wherein an annular groove is provided in the upper end face of the pan head spool shaft, and an end face rotating sealing collar is provided in the annular groove.
6. The anti-freezing cryogenic fluid rotary joint according to claim 1, wherein an end face internal rotary seal and/or an end face external rotary seal are arranged between the end face seal connecting flange and the pan head pipe shaft, the end face internal rotary seal is embedded in an inner hole of the end face rotary seal retainer ring, and the end face external rotary seal is embedded in an inner hole of the bearing positioning sleeve.
7. The anti-freezing cryogenic fluid rotary joint of claim 1 wherein at least one pipe shaft rotary seal is coaxially sleeved on the pan head pipe shaft between the pan head pipe shaft and the housing; a tubular shaft rotary sealing pressing ring is arranged in a groove at the bottom of the shell; a dustproof ring frame flange is arranged in an annular groove at the lower end of the shell, and a tubular shaft dustproof ring is arranged in an inner hole of the dustproof ring frame flange.
8. The anti-freezing cryogenic fluid rotary joint as claimed in claim 1, wherein the end face sealing connection flange and the pan head tubular shaft are provided with fluid passage center holes communicated with each other, and welding interfaces are respectively provided at the upper end of the end face sealing connection flange and the lower end of the pan head tubular shaft; the lower end face of the end face sealing connecting flange and the upper end face of the pan head tubular shaft are respectively provided with a stepped hole which is coaxial with a central hole of the flange at a position close to the central hole, and a circular sealing ring is embedded in the stepped holes.
9. The anti-freezing cryogenic fluid swivel joint of claim 1 wherein a housing face seal is provided between the housing upper end and the face seal attachment flange.
10. The anti-freezing cryogenic fluid swivel joint of claim 1 wherein an end face seal attachment flange is attached to the upper end of said housing with a second fastener; the dustproof ring frame flange is connected to the lower end face of the shell through a fastener.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920618284.9U CN209818979U (en) | 2019-04-30 | 2019-04-30 | Anti-freezing low-temperature fluid rotary joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920618284.9U CN209818979U (en) | 2019-04-30 | 2019-04-30 | Anti-freezing low-temperature fluid rotary joint |
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| Publication Number | Publication Date |
|---|---|
| CN209818979U true CN209818979U (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920618284.9U Active CN209818979U (en) | 2019-04-30 | 2019-04-30 | Anti-freezing low-temperature fluid rotary joint |
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| Country | Link |
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| CN (1) | CN209818979U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005888A (en) * | 2019-04-30 | 2019-07-12 | 鞍山市昱虎流体设备有限公司 | Anti-freezing cryogen rotary joint |
| CN111692343A (en) * | 2020-06-18 | 2020-09-22 | 中国人民解放军63796部队 | Super-hydrophobic anti-icing cover of low-temperature connector |
-
2019
- 2019-04-30 CN CN201920618284.9U patent/CN209818979U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005888A (en) * | 2019-04-30 | 2019-07-12 | 鞍山市昱虎流体设备有限公司 | Anti-freezing cryogen rotary joint |
| CN110005888B (en) * | 2019-04-30 | 2024-03-01 | 鞍山市昱虎流体设备有限公司 | Anti-freezing low-temperature fluid rotary joint |
| CN111692343A (en) * | 2020-06-18 | 2020-09-22 | 中国人民解放军63796部队 | Super-hydrophobic anti-icing cover of low-temperature connector |
| CN111692343B (en) * | 2020-06-18 | 2022-04-15 | 中国人民解放军63796部队 | Super-hydrophobic anti-icing cover of low-temperature connector |
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