CN203641573U - Plane sealing suction bottom valve matched with low temperature immersed pump - Google Patents
Plane sealing suction bottom valve matched with low temperature immersed pump Download PDFInfo
- Publication number
- CN203641573U CN203641573U CN201320864771.6U CN201320864771U CN203641573U CN 203641573 U CN203641573 U CN 203641573U CN 201320864771 U CN201320864771 U CN 201320864771U CN 203641573 U CN203641573 U CN 203641573U
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- Prior art keywords
- low temperature
- immersed pump
- temperature immersed
- bottom valve
- valve
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- Expired - Lifetime
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- 238000007789 sealing Methods 0.000 title claims abstract description 63
- 239000000463 material Substances 0.000 claims description 8
- ZWAOHEXOSAUJHY-ZIYNGMLESA-N doxifluridine Chemical compound O[C@@H]1[C@H](O)[C@@H](C)O[C@H]1N1C(=O)NC(=O)C(F)=C1 ZWAOHEXOSAUJHY-ZIYNGMLESA-N 0.000 claims description 4
- 238000003825 pressing Methods 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
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 3
- 239000004809 Teflon Substances 0.000 claims 1
- 229920006362 Teflon® Polymers 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract 1
- 239000003949 liquefied natural gas Substances 0.000 description 8
- 238000003860 storage Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 150000001335 aliphatic alkanes Chemical class 0.000 description 2
- 239000011280 coal tar Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 239000001294 propane 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
- 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
- 239000002360 explosive Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
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- Details Of Reciprocating Pumps (AREA)
Abstract
The utility model relates to the field of low temperature vertical type in-tank immersed pumps, and discloses a plane sealing suction bottom valve matched with a low temperature immersed pump. The plane 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 and a spring guide rod. A plane 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, and the spring guide rod penetrates through a through hole of the circular arc boss II and is fixed to the valve plate. 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. A cylindrical cavity is formed inside the valve body. According to the plane sealing suction bottom valve matched with the low temperature immersed pump, the opening and closing of the suction bottom valve are controlled through dead weight of the low temperature immersed pump, the plane 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 plane 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 plane sealing 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 plane sealing 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 plane sealing 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 ensured simultaneously.
For achieving the above object, the technical solution adopted in the utility model is: provide the supporting plane sealing of a kind of low temperature immersed pump to suck bottom valve, the supporting plane sealing of described low temperature immersed pump sucks bottom valve and 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 plane structure, and described 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 is plane structure; 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 is arranged on valve body 5 bottom ends that contact with valve plate 11.
Wherein, the supporting plane sealing suction of described low temperature immersed pump bottom valve also comprises: anti-rotation device; Described anti-rotation device is arranged at valve body 5 lower end inwalls.
Wherein, 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 self, and lattice keep off mutually.
Wherein, described sealing configuration is sealing gasket 14, and the structure of described sealing gasket 14 is intermediate groove form, and groove outside is arc surface annular protrusion, and groove inner side is planar projections, and a little higher than planar projections of arc surface annular protrusion; The pressing plate 15 that described sealing gasket 14 is made by Austenitic Stainless Steel is fastened on valve body 5.
Wherein, the material of described sealing gasket 14 is ultra-high molecular weight polyethylene, polytetrafluoroethylene (PTFE) or Furtulon (V7026).
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.
Wherein, the structure that adopts plane to add O type circle between described low temperature immersed pump 3 and suction bottom valve 4 seals, and low temperature immersed pump 3 contacts completely with the sealing surfaces that sucks bottom valve 4.
Wherein, described spring 6 is cylindrical helical spring, and material is Austenitic 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, ensures 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.
Brief description of the drawings
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.
Fig. 4 is spring guide fixed form schematic diagram 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, 16-bolt/screw, 17-slotted nut, 18-pin.
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 plane sealing 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 plane structure, and described 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 is plane structure; 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 is arranged on valve body 5 bottom ends that contact with valve plate 11, has ensured to suck the sealing reliability under bottom valve 4 low temperature.Wherein, the boss structure of valve plate 11 upper-end surface designs, compared with same kind of products at abroad, has reduced captured area, has strengthened the resistance to liquid, can reach better sealing effect.
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, ensured 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 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, described sealing configuration is sealing gasket 14, and the structure of described sealing gasket 14 is intermediate groove form, and groove outside is arc surface annular protrusion, and groove inner side is planar projections, and a little higher than planar projections of arc surface annular protrusion; The pressing plate 15 that described sealing gasket 14 is made by Austenitic Stainless Steel is fastened on valve body 5.
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, 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, then tight with stud or bolt handle, thus realize the seal request sucking between bottom valve 4 and pump sump 2.
The structure that adopts plane to add O type circle between described low temperature immersed pump 3 and suction bottom valve 4 seals, and low temperature immersed pump 3 contacts completely with the sealing surfaces that sucks bottom valve 4.
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 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, ensured 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 planeness have ensured to suck bottom valve sealing reliability at low temperatures thus.
Above content is the further description of the utility model being done in conjunction with optimal technical scheme, can not assert that the concrete enforcement of model utility only limits to these explanations.Concerning the utility model person of an ordinary skill in the technical field, not departing under the prerequisite of design of the present utility model, can also make simple deduction and replacement, all should be considered as protection domain of the present utility model.
Claims (10)
1. the supporting plane sealing of low temperature immersed pump sucks bottom valve, it is characterized in that, the supporting plane sealing 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 plane 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) is plane structure; 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 is arranged on valve body (5) bottom end contacting with valve plate (11).
2. the supporting plane sealing 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: anti-rotation device; Described anti-rotation device is arranged at valve body (5) lower end inwall.
3. the supporting plane sealing of a kind of low temperature immersed pump according to claim 2 sucks bottom valve, it is characterized in that, 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.
4. the supporting plane sealing of a kind of low temperature immersed pump according to claim 1 sucks bottom valve, it is characterized in that, described sealing configuration is sealing gasket (14), the structure of described sealing gasket (14) is intermediate groove form, groove outside is arc surface annular protrusion, groove inner side is planar projections, and a little higher than planar projections of arc surface annular protrusion; Described sealing gasket (14) is fastened on valve body (5) by pressing plate (15).
5. the supporting plane sealing of a kind of low temperature immersed pump according to claim 4 sucks bottom valve, it is characterized in that, the material of described sealing gasket (14) is ultra-high molecular weight polyethylene, teflon or Furtulon.
6. the supporting plane sealing 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.
7. the supporting plane sealing 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).
8. the supporting plane sealing 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.
9. the supporting plane sealing of a kind of low temperature immersed pump according to claim 1 sucks bottom valve, it is characterized in that, the structure that adopts plane to add O type circle between described low temperature immersed pump (3) and suction bottom valve (4) seals, and low temperature immersed pump (3) contacts completely with the sealing surfaces that sucks bottom valve (4).
10. the supporting plane sealing 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 |
|---|---|---|---|
| CN201320864771.6U CN203641573U (en) | 2013-12-04 | 2013-12-26 | Plane sealing suction bottom valve matched with low temperature immersed pump |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320787096 | 2013-12-04 | ||
| CN201320787096.1 | 2013-12-04 | ||
| CN201320864771.6U CN203641573U (en) | 2013-12-04 | 2013-12-26 | Plane sealing suction bottom valve matched with low temperature immersed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203641573U true CN203641573U (en) | 2014-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320864771.6U Expired - Lifetime CN203641573U (en) | 2013-12-04 | 2013-12-26 | Plane sealing suction bottom valve matched with low temperature immersed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203641573U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629394A (en) * | 2013-12-26 | 2014-03-12 | 大连深蓝泵业有限公司 | Planar sealing suction bottom valve matched with low-temperature immersed pump |
| CN104747908A (en) * | 2015-04-14 | 2015-07-01 | 陕西瑞科特种设备技术有限公司 | Online drawable immersed pump system for deep-cooling storage tank |
| CN105485513A (en) * | 2015-12-31 | 2016-04-13 | 成都华气厚普机电设备股份有限公司 | Built-in pump LNG (liquefied natural gas) storage tank |
| 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 |
-
2013
- 2013-12-26 CN CN201320864771.6U patent/CN203641573U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629394A (en) * | 2013-12-26 | 2014-03-12 | 大连深蓝泵业有限公司 | Planar sealing suction bottom valve matched with low-temperature immersed pump |
| CN104747908A (en) * | 2015-04-14 | 2015-07-01 | 陕西瑞科特种设备技术有限公司 | Online drawable immersed pump system for deep-cooling storage tank |
| CN105485513A (en) * | 2015-12-31 | 2016-04-13 | 成都华气厚普机电设备股份有限公司 | Built-in pump LNG (liquefied natural gas) storage tank |
| 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 |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140611 |