CN103821732A - Vertical pump pool multi-stage immersed pump - Google Patents
Vertical pump pool multi-stage immersed pump Download PDFInfo
- Publication number
- CN103821732A CN103821732A CN201410062194.8A CN201410062194A CN103821732A CN 103821732 A CN103821732 A CN 103821732A CN 201410062194 A CN201410062194 A CN 201410062194A CN 103821732 A CN103821732 A CN 103821732A
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- pump
- immersed
- pond
- liquid motor
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- 239000007788 liquid Substances 0.000 claims abstract description 25
- 239000011229 interlayer Substances 0.000 claims abstract description 5
- 238000004880 explosion Methods 0.000 claims description 4
- 239000000411 inducer Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 5
- 238000004321 preservation Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000009189 diving Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses a vertical pump pool multi-stage immersed pump which comprises a pump pool and a pump set arranged in the pump pool. A vacuum heat preservation interlayer is arranged on the side wall of the pump pool. The side wall of the pump pool is connected with a medium inlet pipe, and the top of the pump pool is connected with a medium outlet pipe. The pump set is formed by axially connecting an immersed motor and a pump body, and the immersed motor and the pump body are coaxially connected. A reflowing hole is formed in a shell body of the immersed motor. The pump body comprises a suction segment and a middle segment. An outlet of the pump set is communicated with the medium outlet pipe through a liquid outlet pipe. The vertical pump pool multi-stage immersed pump has the advantages of being safe in structure, stable in performance and efficient, saving energy, being good in sealing performance and the like, and can meet the work requirement of safety production in a low-temperature work environment.
Description
Technical field
The present invention relates to a kind of cryopump, be specifically related to the multistage immersed pump in low temperature vertical pump pond of carrying for LNG in a kind of medium-sized LNG receiving station and LNG liquefaction plant.
Background technique
At present, in medium-sized LNG receiving station and LNG liquefaction plant, all need to use LNG transfer pump for LNG medium transport and loading/unloading vehicles etc., because LNG medium has the characteristic of low temperature, inflammable, explosive and easy gasification, it requires to carry the pumping unit of LNG need have that sealing is reliable, operation fluid loss is little and the reliable feature of structural safety.Design difficulty is large, and externally interdependency is high, and overseas equipment is expensive.
The home-made equipment of immersed pump is conducive to LNG production and receives the cost control of link, is conducive to the application extension of vertical pump pond immersed pump in big-and-middle-sized LNG receiving station and liquefaction factory, is conducive to the lifting of domestic low temperature LNG pump Design and manufacture level.
Summary of the invention
The object of this invention is to provide the multistage immersed pump in a kind of vertical pump pond, rational in infrastructure, the stability and safety of this multistage immersed pump, be applicable to medium and small LNG receiving station and LNG liquefaction plant and use.
The multistage immersed pump in a kind of vertical pump provided by the present invention pond, it comprises pump pond and is arranged at the pump group in this pump pond;
The sidewall in described pump pond is vacuum heat-preserving interlayer; On the sidewall in described pump pond, be connected with medium inlet pipe, on its top, be connected with media outlet pipe;
Described pump group by dive liquid motor and pump shaft to connecting to form, and described latent liquid motor with pump for to be coaxially connected;
The housing of described latent liquid motor is provided with return port; Described pump comprises suction casing and stage casing;
The outlet of described pump group is connected with described media outlet pipe by drain pipe.
The above-mentioned multistage immersed pump in vertical pump pond has adopted the pump pond with vacuum heat-preserving interlayer, can play best cold insulation effect, has reduced because of the medium loss of liquid causing that gasifies; Meanwhile, because of stationary seal, prevented the leakage of medium, sealing is reliable, the Security that has improved pump group.Due to the setting of return port, described latent liquid motor is lubricated by pumped medium, passes through the rate-of flow in electric machine rotor gap by accurate Calculation, can guarantee the working life of motor.
In the above-mentioned multistage immersed pump in vertical pump pond, the two ends of described latent liquid motor are connected with lower support frame with upper support frame by bearing respectively.
In the above-mentioned multistage immersed pump in vertical pump pond, the suction casing of described pump can be taper, the ingress of this suction casing is provided with filter screen, and then can prevent the operation of the impurity effect pump group in pipe-line system, adopt taper suction casing simultaneously, can increase entrance area of passage, the inlet pressure that reduces to cause because of filter screen is lost the impact on pump group suction performance.
In the above-mentioned multistage immersed pump in vertical pump pond, for bolt is connected, easy for installation between the suction casing of described pump and stage casing, registration.
In the above-mentioned multistage immersed pump in vertical pump pond, the entry end of described pump group is provided with inducer, and this structure can produce good anti-cavitation performance.
In described pump, be provided with balance hub, described balance hub is sheathed on the pump shaft of described pump, and it is ballast pump group axial force well, and bearing is turned round under very little thrust loading, has extended the working life of bearing, has improved the reliability of pump group.
In the above-mentioned multistage immersed pump in vertical pump pond, described bearing place is provided with dish spring, can prevent variable working condition time, axial force changes the impact to the operation of pump group, simultaneously, can reduce because of pump shaft and housing temperature deformation amount is inhomogeneous acts on the impact on the operation of pump group of additional load on bearing, the working life of improving pump group.
In the above-mentioned multistage immersed pump in vertical pump pond, the outlet section of described drain pipe is bend pipe, reduces because of the impact of temperature deformation on the operation of pump group.
In the above-mentioned multistage immersed pump in vertical pump pond, described drain pipe and described upper support frame can be and be welded and fixed;
Described pump group is provided with 4 drain pipes, and is evenly arranged at circumferencial direction, the axial force that balance pump shaft produces well.
In the above-mentioned multistage immersed pump in vertical pump pond, described latent liquid motor is connected with the anti-explosion terminal box being arranged at outside described pump pond.
The multistage immersed pump in vertical pump provided by the invention pond has the features such as structural safety, stable performance, energy-efficient, good airproof performance, can realize the job requirement of keeping the safety in production under low-temperature working environment.
Accompanying drawing explanation
Fig. 1 is the structural representation of vertical pump of the present invention pond immersed pump.
Fig. 2 is the cooling circuit schematic diagram of the latent liquid motor in the immersed pump of vertical pump of the present invention pond.
Fig. 3 is the structural representation of the pump group outlet section elbow pipe welding of vertical pump of the present invention pond immersed pump.
Fig. 4 is the structural representation of the pump group bearing place dish spring of vertical pump of the present invention pond immersed pump.
In figure, each mark is as follows: 1 pump pond, 2 suction casings, 3 impellers, 4 stage casings, 5 bearings, 6 upper support frames, 7 SEALING FITTING, 8 anti-explosion terminal boxs, 9 dish springs, 10 latent liquid motors, 11 pump shafts, 12 lower support framves, 13 balance hub, 14 bend pipes, 15 inducers, 16 filter screens, 17 medium inlet pipes, 18 media outlet pipes, 19 drain pipes.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described, but the present invention is not limited to following examples.
As shown in Figure 1, the multistage immersed pump in vertical pump provided by the invention pond comprises pump pond 1 and the pump group in this pump pond 1 is set; The sidewall in this pump pond 1 is vacuum heat-preserving interlayer, thereby can play best cold insulation effect, has reduced because of the medium loss of liquid causing that gasifies.Meanwhile, because of stationary seal, can effectively prevent the leakage of medium, sealingly secure, reliable, the Security that has improved pump group.On the sidewall in pump pond 1, be connected with medium inlet pipe 17, on its top, be connected with media outlet pipe 18; This pump group is by dive liquid motor 10 and pump shaft to connecting to form, and this latent liquid motor 10 and pump are take pump shaft 11 coaxial connection as axle forms; The housing of this latent liquid motor 10 is provided with return port (not marking in figure), as shown in Figure 2; And this latent liquid motor 10 is connected by SEALING FITTING 7 with the anti-explosion terminal box 8 being arranged at outside pump pond 1; The two ends of latent liquid motor 10 are connected with lower support frame 12 with upper support frame 6 by bearing 5 respectively; This pump comprises suction casing 2 and stage casing 4; And this suction casing 2 is taper, be provided with filter screen 16 in its ingress, can prevent the operation of the impurity effect pump group in pipe-line system, adopt taper suction casing 2 simultaneously, can increase entrance area of passage, reduce the impact on pump group suction performance of the pressure loss that causes because of filter screen 16, and suction casing 2 form with bolts with stage casing 4, easy for installation, registration; The entry end of this pump group is provided with inducer 15, can produce good anti-cavitation performance; In pump, be designed with balance hub 13, as shown in Figure 2, it is sheathed on pump shaft 11, the axial force that well ballast pump produces, and residue thrust load is born by bearing 5.The outlet of pump group is connected with media outlet pipe 18 by 4 drain pipes 19, as shown in Figure 3, the outlet section of this drain pipe 19 is bend pipe 14, itself and upper support frame 12 are for being welded and fixed, and above-mentioned 4 drain pipes 19 are evenly arranged in a circumferential direction, the setting of said structure, simplify product manufacture, adopt section bar manufacture can better guarantee quality of product simultaneously, adopt bend pipe structure, can reduce because of the impact of temperature deformation on the operation of pump group.As shown in Figure 4, at bearing, 5 places are provided with dish spring 9, and can prevent variable working condition time, axial force changes the impact to the operation of pump group, simultaneously, can reduce because of pump shaft 11 and housing temperature deformation amount is inhomogeneous acts on the impact on the operation of pump group of additional load on bearing, the working life of improving pump group.
As shown in Figure 2, the cooling procedure of latent liquid motor is: lubricated by pumped medium, pumped medium is by impeller 3 backs, through balancing drum 13 throttlings, the bearing 5 of liquid motor 10 lower ends of diving of flowing through, is lubricated bearing 5, in the gap of flowing through motor stator 10-1 and rotor 10-2, the liquid motor 10 of diving is carried out cooling, finally get back to pump inlet by the return port of diving on liquid motor 10 housings.Pass through the rate-of flow in electric machine rotor gap by accurate Calculation, can guarantee the working life of motor.
Claims (9)
1. the multistage immersed pump in vertical pump pond, is characterized in that: it comprises pump pond and the pump group in this pump pond is set;
The sidewall in described pump pond is vacuum heat-preserving interlayer; On the sidewall in described pump pond, be connected with medium inlet pipe, on its top, be connected with media outlet pipe;
Described pump group by dive liquid motor and pump shaft to connecting to form, and described latent liquid motor with pump for to be coaxially connected;
The housing of described latent liquid motor is provided with return port; Described pump comprises suction casing and stage casing;
The outlet of described pump group is connected with described media outlet pipe by drain pipe.
2. immersed pump according to claim 1, is characterized in that: the two ends of described latent liquid motor are connected with lower support frame with upper support frame by bearing respectively.
3. immersed pump according to claim 1 and 2, is characterized in that: the suction casing of described pump is taper, and the ingress of this suction casing is provided with filter screen.
4. according to the immersed pump described in any one in claim 1-3, it is characterized in that: between the suction casing of described pump and stage casing for bolt is connected.
5. according to the immersed pump described in any one in claim 1-4, it is characterized in that: the entry end of described pump group is provided with inducer;
In described pump, be provided with balance hub, described balance hub is sheathed on the pump shaft of described pump.
6. according to the immersed pump described in any one in claim 2-5, it is characterized in that: described bearing place is provided with dish spring.
7. according to the immersed pump described in any one in claim 1-6, it is characterized in that: the outlet section of described drain pipe is bend pipe.
8. according to the immersed pump described in any one in claim 2-7, it is characterized in that: described drain pipe and described upper support frame are for being welded and fixed;
Described pump group is provided with 4 drain pipes, and is evenly arranged at circumferencial direction.
9. according to the immersed pump described in any one in claim 1-8, it is characterized in that: described latent liquid motor is connected with the anti-explosion terminal box being arranged at outside described pump pond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410062194.8A CN103821732A (en) | 2014-02-24 | 2014-02-24 | Vertical pump pool multi-stage immersed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410062194.8A CN103821732A (en) | 2014-02-24 | 2014-02-24 | Vertical pump pool multi-stage immersed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103821732A true CN103821732A (en) | 2014-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410062194.8A Pending CN103821732A (en) | 2014-02-24 | 2014-02-24 | Vertical pump pool multi-stage immersed pump |
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| CN (1) | CN103821732A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100537A (en) * | 2014-07-07 | 2014-10-15 | 中船重工重庆智能装备工程设计有限公司 | LNG (liquefied natural gas) immersed centrifugal pump |
| CN104564711A (en) * | 2015-01-19 | 2015-04-29 | 江苏省特种设备安全监督检验研究院无锡分院 | Submerged double-discharging magnetic driving pump for conveying liquefied natural gas |
| CN105257556A (en) * | 2015-09-09 | 2016-01-20 | 江苏德邦工程有限公司 | Low temperature immersed pump system feeding liquefied natural gas (LNG) |
| CN105782129A (en) * | 2016-04-14 | 2016-07-20 | 天津英铁科技有限公司 | Axial flow pump plate combining installation device |
| CN106481568A (en) * | 2016-12-13 | 2017-03-08 | 浙江新控泵业有限公司 | Self-priming shields combination pump |
| CN107044911A (en) * | 2017-05-16 | 2017-08-15 | 大连深蓝泵业有限公司 | Low-temperature test system and liquefied natural gas decompression operating mode LNG hydraulic turbine low-temperature test methods |
| CN107687425A (en) * | 2017-08-21 | 2018-02-13 | 王道红 | Vertical multi-stage vacuum and low temperature immersed pump |
| WO2024078998A1 (en) * | 2022-10-10 | 2024-04-18 | Oerlikon Textile Gmbh & Co. Kg | Pump for conveying cooled liquid gas from a first vessel to a second vessel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694219A (en) * | 2009-09-28 | 2010-04-14 | 张家港圣汇气体化工装备有限公司 | Low-temperature pumping tank |
| CN202483903U (en) * | 2012-02-28 | 2012-10-10 | 浙江机电职业技术学院 | Liquefied natural gas (LNG) immersed pump |
| CN203743015U (en) * | 2014-02-24 | 2014-07-30 | 中国海洋石油总公司 | Vertical pump pond multilevel immersed pump |
-
2014
- 2014-02-24 CN CN201410062194.8A patent/CN103821732A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694219A (en) * | 2009-09-28 | 2010-04-14 | 张家港圣汇气体化工装备有限公司 | Low-temperature pumping tank |
| CN202483903U (en) * | 2012-02-28 | 2012-10-10 | 浙江机电职业技术学院 | Liquefied natural gas (LNG) immersed pump |
| CN203743015U (en) * | 2014-02-24 | 2014-07-30 | 中国海洋石油总公司 | Vertical pump pond multilevel immersed pump |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100537A (en) * | 2014-07-07 | 2014-10-15 | 中船重工重庆智能装备工程设计有限公司 | LNG (liquefied natural gas) immersed centrifugal pump |
| CN104564711A (en) * | 2015-01-19 | 2015-04-29 | 江苏省特种设备安全监督检验研究院无锡分院 | Submerged double-discharging magnetic driving pump for conveying liquefied natural gas |
| CN105257556A (en) * | 2015-09-09 | 2016-01-20 | 江苏德邦工程有限公司 | Low temperature immersed pump system feeding liquefied natural gas (LNG) |
| CN105782129A (en) * | 2016-04-14 | 2016-07-20 | 天津英铁科技有限公司 | Axial flow pump plate combining installation device |
| CN105782129B (en) * | 2016-04-14 | 2017-11-21 | 天津英铁科技有限公司 | Axial-flow pump dish closes erecting device |
| CN106481568A (en) * | 2016-12-13 | 2017-03-08 | 浙江新控泵业有限公司 | Self-priming shields combination pump |
| CN106481568B (en) * | 2016-12-13 | 2019-06-18 | 浙江新控泵业有限公司 | Self-priming shields combination pump |
| CN107044911A (en) * | 2017-05-16 | 2017-08-15 | 大连深蓝泵业有限公司 | Low-temperature test system and liquefied natural gas decompression operating mode LNG hydraulic turbine low-temperature test methods |
| CN107687425A (en) * | 2017-08-21 | 2018-02-13 | 王道红 | Vertical multi-stage vacuum and low temperature immersed pump |
| WO2024078998A1 (en) * | 2022-10-10 | 2024-04-18 | Oerlikon Textile Gmbh & Co. Kg | Pump for conveying cooled liquid gas from a first vessel to a second vessel |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20140528 |