CN203641572U - Conical sealing suction bottom valve matched with low temperature immersed pump - Google Patents
Conical sealing suction bottom valve matched with low temperature immersed pump Download PDFInfo
- Publication number
- CN203641572U CN203641572U CN201320864763.1U CN201320864763U CN203641572U CN 203641572 U CN203641572 U CN 203641572U CN 201320864763 U CN201320864763 U CN 201320864763U CN 203641572 U CN203641572 U CN 203641572U
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- low temperature
- immersed pump
- temperature immersed
- valve
- spring
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- 238000007789 sealing Methods 0.000 title claims abstract description 45
- 239000000463 material Substances 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 5
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- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 3
- 229950005454 doxifluridine Drugs 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 3
- 239000004809 Teflon Substances 0.000 claims description 2
- 229920006362 Teflon® Polymers 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 7
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- 230000007774 longterm Effects 0.000 abstract 1
- 239000003949 liquefied natural gas Substances 0.000 description 8
- 238000003860 storage Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 239000011280 coal tar Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000001294 propane Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
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- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
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- 238000003754 machining Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The utility model relates to the field of low temperature vertical type in-tank immersed pumps, and discloses a conical sealing suction bottom valve matched with a low temperature immersed pump. The conical sealing suction bottom valve matched with the low temperature immersed pump is mounted on the bottom of a pump well, and comprises a valve body, a valve plate, a spring, a spring guide rod and a sealing structure. A conical structure is adopted by the valve body, a circular arc boss I is arranged at the upper end of the valve body, and sealing is carried out between the upper end face of the circular arc boss I and a flange end face of the pump well. A circular arc boss II is arranged at the lower end of the valve body, the spring guide rod penetrates through a through hole of the circular arc boss II and is fixed to the valve plate, the middle part of the valve plate is supported inwards by rib plates to form flow channels, and the top end of the valve plate is a plane. The spring is arranged on the outer edge of the spring guide rod in a sleeved mode and at the upper end of the circular arc boss II, and is fixed to the spring guide rod through a fixing device. The conical sealing suction bottom valve matched with the low temperature immersed pump is simple in structure, stable in performance, good in airtightness and needless for maintenance due to the fact that the conical sealing suction bottom valve matched with the low temperature immersed pump is immerged into low temperature liquid for a long term, and the working requirements for running safely under low temperature working environment can be met.
Description
Technical field
The utility model relates to immersed pump field in low temperature vertical tank, be particularly related to the supporting conical surface seal of a kind of low temperature vertical immersed pump and suck bottom valve, can be applicable to LNG(is LNG Liquefied natural gas, and temperature is-162 °) conveying of the cryogenic media such as alkanes, olefines in industrial chain, coal tar furnace gas methanation LNG processed, dehydrogenating propane project.
Background technique
At present, in alkanes, the hydrocarbon medium of large, medium and small LNG receiving station, LNG liquefaction plant, coal tar furnace gas methanation LNG device processed and dehydrogenating propane project are carried, all need to use low temperature immersed pump, because medium has the characteristic of low temperature, inflammable, explosive and easy vaporization, therefore require to carry the pumping unit of this medium to there is sealing reliably and the reliable feature of structural safety, but the design difficulty of this low temperature immersed pump is very large.
Present stage low temperature immersed pump market is mainly by several monopolizations such as the Nikkiso of the J.C.Carter of the U.S., Japanese Ebara company, Japan, and the domestic manufacturing firm that there is no carries out research and production to low temperature immersed pump in LNG tank.Therefore, the external interdependency of this low temperature immersed pump is higher, and price is also very expensive.
The production domesticization of low temperature immersed pump and supporting suction bottom valve is conducive to the cost control in low temperature immersed pump Process of Localization, be conducive to the maintenance of low temperature immersed pump, the lifting that is conducive to domestic low temperature immersed pump overall design and manufactures level of processing, be conducive to the application extension of state's inner spring under worst cold case, be conducive to the application of domestic low temperature seal cushion material.Therefore, urgently
oneplant the supporting conical surface seal of low temperature immersed pump and suck bottom valve.
Summary of the invention
The purpose of this utility model is: in order to solve, existing low temperature immersed pump designed, designed difficulty is large, the external high and expensive technical problem of interdependency, provide the supporting conical surface seal of a kind of low temperature immersed pump to suck bottom valve, controlled the open and close of valve plate by the deadweight of low temperature immersed pump, the service condition of low temperature immersed pump be can meet, safety and reliable sealing in maintenance process guaranteed simultaneously.
For achieving the above object, the technical solution adopted in the utility model is: provide the supporting conical surface seal of a kind of low temperature immersed pump to suck bottom valve, it is arranged on pump sump 2 bottoms, comprising: valve body 5, valve plate 11, spring 6, spring guide 7, sealing configuration; Described valve body 5 adopts cone structure, and valve body 5 upper ends are provided with arc cam I 12, and the end face of flange of the upper-end surface of described arc cam I 12 and pump sump 2 seals; Described valve body 5 lower ends are provided with arc cam II 13, and described spring guide 7 is fixing through through hole and the valve plate 11 of arc cam II 13, and described valve plate 11 middle parts inwardly form runner by gusset support and its top is plane; Described spring 6 is enclosed within the upper end of spring guide 7 outer rims, arc-shaped convex II 13, and is fixed on spring guide 7 by fixing device; Described sealing configuration comprises: be fastened on the sealing gasket 14 of valve body 5 bottom ends and be arranged between the runner gusset and spring guide 7 of valve plate 11, the two circle arc convex in pressing plate 15 interior outsides.
Wherein, the supporting plane sealing suction of described low temperature immersed pump bottom valve also comprises: the anti-rotation device that is arranged at valve body 5 lower end inwalls; Described anti-rotation device is anti-rotation pawl 8, and the anti-rotation pawl I of described anti-rotation pawl 8 and low temperature immersed pump 3 self is staggered, and lattice gear mutually.
Wherein, described sealing gasket 14 adopts smooth plain cushion, and is fastened on valve body 5 by austenite stainless keeper plate of steel 15.
Wherein, the material of described sealing gasket 14 is ultra-high molecular weight polyethylene, teflon or Furtulon.
Wherein, described fixing device is spring capping 9, and described spring capping 9 adopts screw thread or unthreaded hole to add locating stud with spring guide 7 to be connected.
Wherein, between described spring guide 7 and the through hole of arc cam II 13, be provided with setting sleeve 10.
Wherein, between described arc cam I 12 and the end face of flange of pump sump 2, adopt O type circle or metal wound gasket to seal; Between described low temperature immersed pump 3 and suction bottom valve 4, adopt cone structure to seal, and low temperature immersed pump 3 contact completely with the sealing surfaces that sucks bottom valve 4.
Wherein, the angle of the cone structure of described valve body 5 is consistent with low temperature immersed pump 3 cone structure angles.
Wherein, described spring 6 is cylindrical helical spring, and material is spring stainless steel, and the weight relationships of its spring force and low temperature immersed pump 3 is: the weight of low temperature immersed pump 3 is greater than spring force.
The beneficial effects of the utility model are: the utility model, by the open and close of the deadweight control valve plate of low temperature immersed pump, in low temperature immersed pump running, sucks bottom valve low temperature immersed pump is communicated with storage tank; In the time carrying out the maintenance of low temperature immersed pump, suck bottom valve low temperature immersed pump and storage tank are carried out to isolating seal, can effectively prevent that in storage tank, dielectric leakage out, guarantees the Security of operation.Simple in structure, stable performance of the present utility model, good airproof performance, be immersed in cryogenic liquide and do not need to be serviced for a long time, can realize the job requirement of safe operation under low-temperature working environment.
Accompanying drawing explanation
Fig. 1 is mounting point of the present utility model schematic diagram.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is sealed structural representation of the present utility model.
Accompanying drawing mark: 1-storage tank, 2-pump sump, 3-low temperature immersed pump, 4-sucks bottom valve, 5-valve body, 6-spring, 7-spring guide, 8-anti-rotation pawl, 9-spring capping, 10-setting sleeve, 11-valve plate, 12-arc cam I, 13-arc cam II, 14-sealing gasket, 15-pressing plate.
Embodiment
Below in conjunction with drawings and Examples, the utility model is elaborated.
The utility model selects Austenitic Stainless Steel, aluminum alloy as its valve body 5, valve plate 11 materials; The material selection ultra-high molecular weight polyethylene of sealing configuration, polytetrafluoroethylene (PTFE), Furtulon (V7026); Spring 6 is selected spring stainless steel.
With reference to Fig. 1, the supporting conical surface seal of a kind of low temperature immersed pump of the utility model sucks bottom valve and is arranged on pump sump 2 bottoms, and entirety is immersed in cryogenic liquide.
With reference to Fig. 2, the utility model comprises: valve body 5, valve plate 11, spring 6, spring guide 7, sealing configuration, be arranged at the anti-rotation device of valve body 5 lower end inwalls; Described valve body 5 adopts cone structure, and valve body 5 upper ends are provided with arc cam I 12, and the end face of flange of the upper-end surface of described arc cam I 12 and pump sump 2 seals; Described valve body 5 lower ends are provided with arc cam II 13, and described spring guide 7 is fixing through through hole and the valve plate 11 of arc cam II 13, and described valve plate 11 middle parts inwardly form runner by gusset support and its top is plane; Described spring 6 is enclosed within the upper end of spring guide 7 outer rims, arc-shaped convex II 13, and is fixed on spring guide 7 by fixing device; Described sealing configuration comprises: be fastened on the sealing gasket 14 of valve body 5 bottom ends and be arranged between the runner gusset and spring guide 7 of valve plate 11 cone structures, the two circle arc convex in pressing plate 15 interior outsides, guaranteed to suck the sealing reliability under bottom valve 4 low temperature.Wherein, the boss structure of valve plate 11 upper and lower end face designs, compared with same kind of products at abroad, has reduced captured area, has strengthened the resistance to liquid.
Described anti-rotation device is anti-rotation pawl 8, in the time that low temperature immersed pump 3 is in place, described anti-rotation pawl 8 is staggered with the anti-rotation pawl I of low temperature immersed pump self, realize mutual lattice gear, thereby prevent that low temperature immersed pump 3 from suction bottom valve 4, relative rotation occurring in running, increase stability and the reliability of complete machine running, guaranteed the safe and stable operation of low temperature immersed pump 3.
Described fixing device is spring capping 9, and described spring capping 9 adopts screw thread or unthreaded hole to add locating stud with spring guide 7 to be connected, and this structure can be adjusted the aperture that sucks bottom valve 4 more accurately.When spring 6 elastic force are when larger, be difficult for compression, utilize thread pore structure by tight screw thread being more prone to the decrement of Regulation spring 6.
With reference to Fig. 3, because sealing gasket 14 sizes are larger, for guaranteeing the planeness of circumferencial direction, described sealing gasket 14 adopts smooth plain cushion, and is fastened on valve body 5 by austenite stainless keeper plate of steel 15.In suction bottom valve 4 closing process, under the effect of spring force, the arc convex crush seal pad 14 on valve plate 11, plays the effect of sealing.In addition, adopt this kind of arc convex, reduced the area of sealing, the in the situation that of identical pressure, the sealing force needing reduces, and is easy to sealing.The convex surface seal form of inside and outside two circles, has guaranteed that the sealing of suction bottom valve 4 is more reliable.The design of this sealing configuration, has guaranteed low temperature immersed pump 3 is hung out and carried out the maintenance period from pump sump 2, in storage tank, medium does not leak in environment, has guaranteed the Security using.
For prevent valve plate open or closing process in the generation that is unfavorable for the phenomenon sealing such as be offset, rock, between described spring guide 7 and the through hole of arc cam II 13, be provided with setting sleeve 10, with restraining spring guide rod 7 radial-plays, compared with same kind of products at abroad structure, this structure has the guidance quality of better spring guide, the unlatching, the closing process that make to suck bottom valve 4 are more steady, and sealing is more reliable.
Between described arc cam I 12 and the end face of flange of pump sump 2, adopt O type circle or metal wound gasket to seal; Between described low temperature immersed pump 3 and suction bottom valve 4, adopt cone structure to seal, and low temperature immersed pump 3 contact completely with the sealing surfaces that sucks bottom valve 4.
The angle of the cone structure of described valve body 5 cavitys is consistent with the angle of low temperature immersed pump 3 cone structures.
Described spring 6 is cylindrical helical spring, and material is spring stainless steel, and it is linear that characteristic line is, and rigidity is stable.Described spring 6 according to the weight of pump group, valve plate weight, stressed and seal the analysis of required power, carry out detailed analytical calculation, the weight relationships of its spring force and low temperature immersed pump 3 is: the weight of low temperature immersed pump 3 is greater than spring force, has improved the reliability that sucks bottom valve.Described spring 6 lifts spring guide 7 by spring capping 9 and locating stud, and spring guide 7 is connected with valve plate 11, be that the power indirectly-acting of spring 6 is on valve plate 11, further regulate the size of the power that lifts valve plate 11 by the decrement of Regulation spring 6, until reach suction bottom valve aperture and the sealing effect of designing requirement.
Working procedure of the present utility model is: low temperature immersed pump 3 is dropped to and sucked bottom valve 4 inside by pump sump 2, at this moment the lower end surface of low temperature immersed pump 3 acts on valve plate 11 upper-end surfaces, by the deadweight Compress Spring 6 of low temperature immersed pump 3, valve plate 11 is opened downwards, thereby realize the unlatching that sucks bottom valve 4, low temperature immersed pump 3 is communicated with storage tank 1, starts normally operation; In the time carrying out the maintenance of low temperature immersed pump 3 in tank, low temperature immersed pump 3 is hung out from pump sump 2, the power that now low temperature immersed pump 3 acts on valve plate 11 reduces gradually, until low temperature immersed pump 3 departs from valve plate 11 completely, valve plate 11 is risen to valve body 11 lower end sealing surfaces and is removed completely by lifting of spring 6, suck closing of bottom valve 4 thereby completed, low temperature immersed pump 3 is realized isolating seal with the cryogenic media in storage tank 1, effectively prevent that the interior dielectric leakage of storage tank 1 is in environment, guaranteed the safety of maintenance.
The utility model has taken into full account sealing material shrinkage amount at low temperatures, and the surface roughness of valve plate, the machining accuracy of conical surface degree have guaranteed to suck bottom valve 4 sealing reliability at low temperatures thus.
Above content is the further description of the present invention being done in conjunction with optimal technical scheme, can not assert that the concrete enforcement of invention only limits to these explanations.Concerning general technical staff of the technical field of the invention, not departing under the prerequisite of design of the present invention, can also make simple deduction and replacement, all should be considered as protection scope of the present invention.
Claims (10)
1. the supporting conical surface seal of low temperature immersed pump sucks bottom valve, it is characterized in that, the supporting conical surface seal of described low temperature immersed pump sucks bottom valve and is arranged on pump sump (2) bottom, comprising: valve body (5), valve plate (11), spring (6), spring guide (7), sealing configuration; Described valve body (5) adopts cone structure, and valve body (5) upper end is provided with arc cam I (12), and the end face of flange of the upper-end surface of described arc cam I (12) and pump sump (2) seals; Described valve body (5) lower end is provided with arc cam II (13), and described spring guide (7) is fixing through through hole and the valve plate (11) of arc cam II (13), and described valve plate (11) middle part inwardly forms runner by gusset support and its top is plane; Described spring (6) is enclosed within the upper end of spring guide (7) outer rim, arc-shaped convex II (13), and is fixed on spring guide (7) by fixing device; Described sealing configuration comprises: be fastened on the sealing gasket (14) of valve body (5) bottom end and be arranged on the two circle arc convex in outside between the runner gusset and spring guide (7) of valve plate (11), in pressing plate (15).
2. the supporting conical surface seal of a kind of low temperature immersed pump according to claim 1 sucks bottom valve, it is characterized in that, the supporting plane sealing of described low temperature immersed pump sucks bottom valve and also comprises: the anti-rotation device that is arranged at valve body (5) lower end inwall; Described anti-rotation device is anti-rotation pawl (8), and described anti-rotation pawl (8) is staggered with the anti-rotation pawl I of low temperature immersed pump (3) self, and lattice keep off mutually.
3. the supporting conical surface seal of a kind of low temperature immersed pump according to claim 1 sucks bottom valve, it is characterized in that, described sealing gasket (14) adopts smooth plain cushion, and is fastened on valve body (5) by pressing plate (15).
4. the supporting conical surface seal of a kind of low temperature immersed pump according to claim 3 sucks bottom valve, it is characterized in that, the material of described sealing gasket (14) is ultra-high molecular weight polyethylene, teflon or Furtulon.
5. the supporting conical surface seal of a kind of low temperature immersed pump according to claim 1 sucks bottom valve, it is characterized in that, described fixing device is spring capping (9), and described spring capping (9) adds locating stud with spring guide (7) employing screw thread or unthreaded hole and is connected.
6. the supporting conical surface seal of a kind of low temperature immersed pump according to claim 1 sucks bottom valve, it is characterized in that, between described spring guide (7) and the through hole of arc cam II (13), is provided with setting sleeve (10).
7. the supporting conical surface seal of a kind of low temperature immersed pump according to claim 1 sucks bottom valve, it is characterized in that, between described arc cam I (12) and the end face of flange of pump sump (2), adopts O type circle or metal wound gasket to seal.
8. the supporting conical surface seal of a kind of low temperature immersed pump according to claim 1 sucks bottom valve, it is characterized in that, between described low temperature immersed pump (3) and suction bottom valve (4), adopt cone structure to seal, and low temperature immersed pump (3) contact completely with the sealing surfaces that sucks bottom valve (4).
9. the supporting conical surface seal of a kind of low temperature immersed pump according to claim 1 sucks bottom valve, it is characterized in that, the angle of the cone structure of described valve body (5) is consistent with the angle of low temperature immersed pump (3) cone structure.
10. the supporting conical surface seal of a kind of low temperature immersed pump according to claim 1 sucks bottom valve, it is characterized in that, described spring (6) is cylindrical helical spring, material is spring stainless steel, and the weight relationships of its spring force and low temperature immersed pump (3) is: the weight of low temperature immersed pump (3) is greater than spring force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320864763.1U CN203641572U (en) | 2013-12-04 | 2013-12-26 | Conical sealing suction bottom valve matched with low temperature immersed pump |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320786581.7 | 2013-12-04 | ||
| CN201320786581 | 2013-12-04 | ||
| CN201320864763.1U CN203641572U (en) | 2013-12-04 | 2013-12-26 | Conical sealing suction bottom valve matched with low temperature immersed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203641572U true CN203641572U (en) | 2014-06-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320864763.1U Expired - Lifetime CN203641572U (en) | 2013-12-04 | 2013-12-26 | Conical sealing suction bottom valve matched with low temperature immersed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203641572U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629393A (en) * | 2013-12-26 | 2014-03-12 | 大连深蓝泵业有限公司 | Conical surface sealing suction bottom valve matched with low-temperature immersed pump |
| CN106594301A (en) * | 2016-12-22 | 2017-04-26 | 武汉船用机械有限责任公司 | Bottom valve used for immersed pump well |
| CN111412148A (en) * | 2020-02-29 | 2020-07-14 | 淄博博山绿源燃气设备有限公司 | Low-temperature in-tank immersed pump system |
-
2013
- 2013-12-26 CN CN201320864763.1U patent/CN203641572U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629393A (en) * | 2013-12-26 | 2014-03-12 | 大连深蓝泵业有限公司 | Conical surface sealing suction bottom valve matched with low-temperature immersed pump |
| CN106594301A (en) * | 2016-12-22 | 2017-04-26 | 武汉船用机械有限责任公司 | Bottom valve used for immersed pump well |
| CN106594301B (en) * | 2016-12-22 | 2019-11-05 | 武汉船用机械有限责任公司 | A kind of bottom valve for immersed pump pump sump |
| CN111412148A (en) * | 2020-02-29 | 2020-07-14 | 淄博博山绿源燃气设备有限公司 | Low-temperature in-tank immersed pump system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140611 |
|
| CX01 | Expiry of patent term |