CN202811475U - Sealing device applied to low temperature centrifugal liquid pump - Google Patents
Sealing device applied to low temperature centrifugal liquid pump Download PDFInfo
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- CN202811475U CN202811475U CN 201220536210 CN201220536210U CN202811475U CN 202811475 U CN202811475 U CN 202811475U CN 201220536210 CN201220536210 CN 201220536210 CN 201220536210 U CN201220536210 U CN 201220536210U CN 202811475 U CN202811475 U CN 202811475U
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- liquor pump
- temperature centrifugation
- pipeline
- pump
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Abstract
The utility model relates to the technical field of sealing devices, and discloses a sealing device applied to a low temperature centrifugal liquid pump. The sealing device comprises a first pipeline, a second pipeline, a first stop valve and a second stop valve, wherein the first pipeline stretches into an outer seal of the low temperature centrifugal liquid pump, the first stop valve is arranged on the first pipeline, the second pipeline stretches into an inner seal of the low temperature centrifugal liquid pump, and the second stop valve is arranged on the second pipeline. The sealing device applied to the low temperature centrifugal liquid pump not only prevents low temperature liquid in the low temperature centrifugal liquid pump from leaking the exterior of a pump body, but also ensures that low temperature is not conducted to an electric motor side along a pump shaft of the low temperature centrifugal liquid pump. The sealing device applied to the low temperature centrifugal liquid pump is reasonable in structure, remarkable in effect, and strong in practical applicability.
Description
Technical field
The utility model relates to the seal arrangement technical field, mainly is applicable to the seal arrangement of low-temperature centrifugation liquor pump.
Background technique
The low-temperature centrifugation liquor pump is worked under deep cooling (below 100 ℃) state, and cryogenic liquide pressure after pump pressurization raises, and will pass labyrinth seal and leak into the outside of the pump housing.Simultaneously, low temperature is transmitted to motor side through pump shaft, causes motor bearings to bear low temperature, thereby causes motor bearings to work.Therefore, in the ingress of cryopump the blanket gas device will be set, the pressure that seals on the one hand nitrogen is higher than the pressure of the entrance cryogenic liquide in the pump, thereby cryogenic liquide is not leaked to the outside; On the other hand by the continual heating pump shaft of blanket gas (blanket gas passes external sealed and is disposed to atmosphere), thereby guarantee that low temperature can not conduct to motor side along pump shaft.
Labyrinth sealing is between Seal cage and running shaft, forms the expansion cavity of a series of well-regulated throttle clearance by one group of sealing gear piece.It produces step by step throttle effect by the viscous friction of medium and the conversion of energy, reduces step by step the leak pressure of compressed media, thereby realizes sealing.For low-temperature centrifugal pump, its labyrinth seal is divided into inside and outside two groups, passes into simultaneously nitrogen, and after interior sealing passed into nitrogen, its pressure was higher than about the about 10kpa of pressure at place, liquid inlet in the pump, thereby has prevented the possibility of cryogenic media to external leakage; After external sealed passes into nitrogen, will uninterruptedly heat pump shaft, guarantee that low temperature can not conduct to motor side along pump shaft.
But the sealing nitrogen of interior sealing has on a small quantity and can enter in the pump, and sends outside the pump with compressed media, pollutes compressed media, causes the purity of compressed media to descend.Such as: low temperature process liquid argon pump in the air separation facility, sealing nitrogen enters by interior sealing will make in the pump that thick liquid argon is nitrogenous to be increased to 145ppm by 30ppm, thereby can cause nitrogenous exceeding standard in the thick liquid argon, to cause " the nitrogen plug " of rectifying column in the air separation facility in the serious situation, and the rectifying operating mode can't normally be carried out; Low-temperature liquid oxygen pump in the air separation facility, sealing nitrogen enter by interior sealing will make nitrogen content increase in the oxygen in the pump, cause steel to descend because of nitrogenous increase quality.
The model utility content
Technical problem to be solved in the utility model provides a kind of seal arrangement that is applicable to the low-temperature centrifugation liquor pump, it has not only prevented the interior cryogenic liquid leakage of low-temperature centrifugation liquor pump to the outside of the pump housing, and has guaranteed that low temperature can not conduct to motor side along the pump shaft of low-temperature centrifugation liquor pump.
For solving the problems of the technologies described above, the utility model provides a kind of seal arrangement that is applicable to the low-temperature centrifugation liquor pump to comprise: the first pipeline, second pipe, the first stop valve and the second stop valve; Described the first pipeline stretches into the external sealed of low-temperature centrifugation liquor pump, and described the first stop valve is arranged on the first pipeline; Described second pipe stretches into the interior sealing of low-temperature centrifugation liquor pump, and described the second stop valve is arranged on the second pipe.
Further, also comprise: reduction valve; Described reduction valve is arranged on the described second pipe, and between the interior sealing and described the second stop valve of low-temperature centrifugation liquor pump.
Further, also comprise: pressure gauge; Described pressure gauge is arranged on the described second pipe, and between the interior sealing and described reduction valve of low-temperature centrifugation liquor pump.
Further, also comprise: automatic pressure regulator and the 3rd pipeline; Described automatic pressure regulator is arranged on the described second pipe, and between the interior sealing and described pressure gauge of low-temperature centrifugation liquor pump; Be tightly connected in one end of described the 3rd pipeline and the low-temperature centrifugation liquor pump, the other end of the 3rd pipeline is connected with automatic pressure regulator.
Further, described the first pipeline stretches into the external sealed of low-temperature centrifugation liquor pump, and the other end of the first pipeline is connected with source nitrogen.
Further, described second pipe stretches into the interior sealing of low-temperature centrifugation liquor pump, and the other end of second pipe is connected with argon gas source.
Further, described reduction valve is Self-operated pressure reducing valve.
Further, the material of described second pipe is stainless steel.
Further, the external diameter of described second pipe is 25mm.
The beneficial effects of the utility model are:
The seal arrangement that is applicable to the low-temperature centrifugation liquor pump that the utility model provides separates inside and outside blanket gas pipeline, and external sealed uses nitrogen as blanket gas, and interior sealing then uses argon gas as blanket gas.Because argon gas is the same with nitrogen, also be inert gas dry, nothing oil, satisfied the requirement of sealing source of the gas; Because argon gas is high boiling component, therefore, argon gas can not affect the rectifying in the air separation facility simultaneously.Like this, the utility model has not only prevented the interior cryogenic liquid leakage of low-temperature centrifugation liquor pump to the outside of the pump housing, and has guaranteed that low temperature can not conduct to motor side along the pump shaft of low-temperature centrifugation liquor pump.The utility model is rational in infrastructure, effect is remarkable, practical.
Description of drawings
The structural representation of the seal arrangement that is applicable to the low-temperature centrifugation liquor pump that Fig. 1 provides for the utility model embodiment.
Wherein, sealing in the 1-low-temperature centrifugation liquor pump, 2-, 3-external sealed, 4-bearing, 5-motor, 6-the first stop valve, 7-the second stop valve, 8-Self-operated pressure reducing valve, 9-automatic pressure regulator, 10-the first pipeline, 11-second pipe, 12-pressure gauge, 13-the 3rd pipeline.
Embodiment
For the further the utility model of setting forth is to reach technological means and the effect that predetermined model utility purpose is taked, below in conjunction with accompanying drawing and preferred embodiment, embodiment and working principle according to the seal arrangement that is applicable to the low-temperature centrifugation liquor pump that the utility model proposes are elaborated.
As shown in Figure 1, the seal arrangement that is applicable to the low-temperature centrifugation liquor pump that the utility model provides comprises: the first pipeline 10, second pipe 11, the first stop valve 6, the second stop valve 7, reduction valve, pressure gauge 12, automatic pressure regulator 9 and the 3rd pipeline 13; External sealed 3, the first stop valves 6 that the first pipeline 10 stretches into low-temperature centrifugation liquor pump 1 are arranged on the first pipeline 10; Interior sealing 2, the second stop valves 7 that second pipe 11 stretches into low-temperature centrifugation liquor pump 1 are arranged on the second pipe 11.Preferably, the first pipeline 10 the other end of stretching into external sealed 3, the first pipelines 10 of low-temperature centrifugation liquor pump 1 is connected with source nitrogen; Second pipe 11 stretches into the interior sealing 2 of low-temperature centrifugation liquor pump 1, and the other end of second pipe 11 is connected with argon gas source.The pressure of the interior blanket gas of low-temperature centrifugation liquor pump 1 is less than or equal to 600kpa, but the pressure of argon gas is 1.6Mpa, therefore, in the present embodiment, reduction valve is arranged on the second pipe 11, and between the interior sealing 2 and the second stop valve 7 of low-temperature centrifugation liquor pump 1, in order to the pressure of argon gas is decompressed to 600kpa by 1.6Mpa, thereby satisfy pressure requirement of the present utility model.For the pressure to the argon gas that adds is monitored, so that the pressure to the argon gas that adds is regulated, to meet the utility model to the requirement of sealing source of the gas, pressure gauge 12 also is arranged on the second pipe 11, and between the interior sealing 2 and reduction valve of low-temperature centrifugation liquor pump 1.Automatic regulating valve 9 is arranged on the second pipe 11, and between the interior sealing 2 and pressure gauge 12 of low-temperature centrifugation liquor pump 1; One end of the 3rd pipeline 13 is connected with the interior sealing 2 of low-temperature centrifugation liquor pump 1, and the other end of the 3rd pipeline 13 is connected with automatic regulating valve 9.
Further, reduction valve is Self-operated pressure reducing valve 8, and second pipe 11 is the Stainless Steel Tube of 25mm for external diameter.
The seal arrangement that is applicable to the low-temperature centrifugation liquor pump that provides by the utility model embodiment seals the low-temperature centrifugation liquor pump, at first open the first stop valve 6, nitrogen arrives the external sealed 3 of low-temperature centrifugation liquor pumps 1 through the first pipeline 10, and passes external sealed 3 and be disposed to atmosphere.Nitrogen heats continual pump shaft to low-temperature centrifugation liquor pump 1 during this time, thereby guarantees that low temperature can not conduct to along the pump shaft of low-temperature centrifugation liquor pump 1 side at bearing 4 and motor 5 places.Simultaneously, open successively the second stop valve 7 and Self-operated pressure reducing valve 8, when argon gas through second pipe 11 during by Self-operated pressure reducing valve 8, Self-operated pressure reducing valve 8 is decompressed to 600kpa with the pressure of argon gas by 1.6Mpa.Arrive again the interior sealing 2 of low-temperature centrifugation liquor pump 1 through automatic pressure regulator 9 along second pipe 11 through the argon gas of decompression.Because the pressure of argon gas is higher than the pressure at the place, liquid inlet of low-temperature centrifugation liquor pump 1 inside, thereby has prevented that the medium of low-temperature centrifugation liquor pump 1 inside is to the generation of the situation of external leakage.Because argon gas is the same with nitrogen, also is inert gas dry, nothing oil, thereby satisfies the requirement of sealing source of the gas; Owing to also contain a small amount of argon in the oxygen, and can't have influence on steel quality, even therefore there is a small amount of argon gas to enter into the inside of low-temperature centrifugation liquor pump 1, be to have influence on steel-making and ironmaking.Need to prove, if there is argon gas to enter into the inside of low-temperature centrifugation liquor pump 1, has the part argon gas and arrive automatic pressure regulator 9 through the 3rd pipeline 13.9 pairs of automatic pressure regulators are monitored from the pressure of the argon gas that low-temperature centrifugation liquor pump 1 arrives, if the pressure that monitors the argon gas that arrives from low-temperature centrifugation liquor pump 1 then reduces valve opening automatically greater than the threshold value of setting; If the pressure that monitors the argon gas that arrives from low-temperature centrifugation liquor pump 1 is less than or equal to the threshold value of setting, then automatically keep valve opening constant.
The seal arrangement that is applicable to the low-temperature centrifugation liquor pump that the utility model provides separates inside and outside blanket gas pipeline, and external sealed uses nitrogen as blanket gas, and interior sealing then uses argon gas as blanket gas.Because argon gas is the same with nitrogen, also be inert gas dry, nothing oil, satisfied the requirement of sealing source of the gas; Because argon gas is high boiling component, therefore, argon gas can not affect the rectifying in the air separation facility simultaneously.Like this, the utility model has not only prevented the interior cryogenic liquid leakage of low-temperature centrifugation liquor pump to the outside of the pump housing, and has guaranteed that low temperature can not conduct to motor side along the pump shaft of low-temperature centrifugation liquor pump.The utility model is rational in infrastructure, effect is remarkable, practical.
It should be noted last that, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to example the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (9)
1. a seal arrangement that is applicable to the low-temperature centrifugation liquor pump is characterized in that, comprising: the first pipeline, second pipe, the first stop valve and the second stop valve; Described the first pipeline stretches into the external sealed of low-temperature centrifugation liquor pump, and described the first stop valve is arranged on the first pipeline; Described second pipe stretches into the interior sealing of low-temperature centrifugation liquor pump, and described the second stop valve is arranged on the second pipe.
2. the seal arrangement that is applicable to the low-temperature centrifugation liquor pump as claimed in claim 1 is characterized in that, also comprises: reduction valve; Described reduction valve is arranged on the described second pipe, and between the interior sealing and described the second stop valve of low-temperature centrifugation liquor pump.
3. the seal arrangement that is applicable to the low-temperature centrifugation liquor pump as claimed in claim 2 is characterized in that, also comprises: pressure gauge; Described pressure gauge is arranged on the described second pipe, and between the interior sealing and described reduction valve of low-temperature centrifugation liquor pump.
4. the seal arrangement that is applicable to the low-temperature centrifugation liquor pump as claimed in claim 3 is characterized in that, also comprises: automatic pressure regulator and the 3rd pipeline; Described automatic pressure regulator is arranged on the described second pipe, and between the interior sealing and described pressure gauge of low-temperature centrifugation liquor pump; Be tightly connected in one end of described the 3rd pipeline and the low-temperature centrifugation liquor pump, the other end of the 3rd pipeline is connected with automatic pressure regulator.
5. the seal arrangement that is applicable to the low-temperature centrifugation liquor pump as claimed in claim 1 is characterized in that, described the first pipeline stretches into the external sealed of low-temperature centrifugation liquor pump, and the other end of the first pipeline is connected with source nitrogen.
6. the seal arrangement that is applicable to the low-temperature centrifugation liquor pump as claimed in claim 1 is characterized in that, described second pipe stretches into the interior sealing of low-temperature centrifugation liquor pump, and the other end of second pipe is connected with argon gas source.
7. the seal arrangement that is applicable to the low-temperature centrifugation liquor pump as claimed in claim 2 is characterized in that, described reduction valve is Self-operated pressure reducing valve.
8. the seal arrangement that is applicable to the low-temperature centrifugation liquor pump as claimed in claim 1 is characterized in that, the material of described second pipe is stainless steel.
9. such as the described seal arrangement that is applicable to the low-temperature centrifugation liquor pump of any one among the claim 1-8, it is characterized in that the external diameter of described second pipe is 25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220536210 CN202811475U (en) | 2012-10-18 | 2012-10-18 | Sealing device applied to low temperature centrifugal liquid pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220536210 CN202811475U (en) | 2012-10-18 | 2012-10-18 | Sealing device applied to low temperature centrifugal liquid pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202811475U true CN202811475U (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220536210 Expired - Fee Related CN202811475U (en) | 2012-10-18 | 2012-10-18 | Sealing device applied to low temperature centrifugal liquid pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202811475U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953574A (en) * | 2014-02-25 | 2014-07-30 | 杭州杭氧工装泵阀有限公司 | Shaft seal structure of low temperature pump and sealing gas control system of shaft seal |
| CN109185143A (en) * | 2018-10-16 | 2019-01-11 | 沈阳透平机械股份有限公司 | The control device of multiaxis multi-stage gear assembly type compressor seal gas |
| KR20210046144A (en) * | 2019-10-18 | 2021-04-28 | 주식회사 포스코 | Oxygen supplying device for ironworks and method for supplying sealing gas of liquid oxygen pump |
-
2012
- 2012-10-18 CN CN 201220536210 patent/CN202811475U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953574A (en) * | 2014-02-25 | 2014-07-30 | 杭州杭氧工装泵阀有限公司 | Shaft seal structure of low temperature pump and sealing gas control system of shaft seal |
| CN103953574B (en) * | 2014-02-25 | 2016-11-23 | 杭州杭氧工装泵阀有限公司 | The shaft seal structure of a kind of cryopump and axle are sealed gas control system |
| CN109185143A (en) * | 2018-10-16 | 2019-01-11 | 沈阳透平机械股份有限公司 | The control device of multiaxis multi-stage gear assembly type compressor seal gas |
| KR20210046144A (en) * | 2019-10-18 | 2021-04-28 | 주식회사 포스코 | Oxygen supplying device for ironworks and method for supplying sealing gas of liquid oxygen pump |
| KR102255862B1 (en) * | 2019-10-18 | 2021-05-25 | 주식회사 포스코 | Oxygen supplying device for ironworks and method for supplying sealing gas of liquid oxygen pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170724 Address after: 430080, Baiyu mountain, Wuhan City, Hubei province (Gate No. 20, Wuhan) Patentee after: Wuhan iron and Steel Group Gas Co Ltd Address before: 430080 Friendship Avenue, Hubei, Wuhan, No. 999 Patentee before: Wuhan Iron & Steel (Group) Corp. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20201018 |