CN203190022U - Interlayer vacuum pumping system for tank body of separated liquefied natural gas tank - Google Patents
Interlayer vacuum pumping system for tank body of separated liquefied natural gas tank Download PDFInfo
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- CN203190022U CN203190022U CN 201320154334 CN201320154334U CN203190022U CN 203190022 U CN203190022 U CN 203190022U CN 201320154334 CN201320154334 CN 201320154334 CN 201320154334 U CN201320154334 U CN 201320154334U CN 203190022 U CN203190022 U CN 203190022U
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Abstract
The utility model discloses an interlayer vacuum pumping system for a tank body of a separated liquefied natural gas tank. The interlayer vacuum pumping system comprises a gas charging valve, a nitrogen heater, a cold cathode ionization gauge, a main valve, a main pump, a Pirani gauge A, a holding pump, a single-stage rotary vane pump, a roots pump, a corrugated pipe A, a manual vacuum valve, a Pirani gauge B, a corrugated pipe B, a manual vacuum butterfly valve, a main vacuum pipeline, a connecting pipeline A, a connecting pipeline B and a connecting pipeline C, wherein the gas sucking end of the holding pump is communicated with the discharging end of the main pump by the connecting pipeline A; the gas sucking end of the main pump is communicated with the connecting pipeline B by the main valve; the connecting pipeline B is further communicated with the discharging end of the main vacuum pipeline; and the Pirani gauge A is arranged on the connecting pipeline A. The cold cathode ionization gauge is arranged on the connecting pipeline B. The system is specially designed for the tank body of the liquefied natural gas tank of which an inner liner is of a multi-layer coiled structure, and the problems of long vacuum pumping time and low vacuum degree of the interlayer in the prior art are solved.
Description
Technical field
The utility model relates to a kind of vacuum pumping system, particularly the vacuum pumping system used of a kind of vacuum sandwich of drawing liquid natural gas tank vehicle tank.
Background technique
In recent years, the LNG Liquefied natural gas tank car tank body has had upgrading progressive in manufacturing technology and structure, it changes over the inner bag multi-lay winding by before pearlife thermoinsulation material, purpose is to reduce mezzanine space, increase inner bag can volume, so along with the technique variation of LNG Liquefied natural gas tank car tank body, now need the technology that new interlayer vacuumizes and the equipment that matches.What substituted during pearlife in the past all is the interlayer that little sliding vane rotary pump or Roots's blade unit come drawing liquid natural gas tank vehicle tank, the length of finding time like that, and degree of vacuum can not guarantee that if take out with diffusion pump, easily the pearlife dust being released again makes diffusion pump impaired at short notice.
The model utility content
The purpose of this utility model provides the split type LNG Liquefied natural gas tank car tank body interlayer pumped vacuum systems that a kind of vacuum sandwich of drawing liquid natural gas tank vehicle tank is used, and solve the bad problem of taking out of vacuum sandwich of LNG Liquefied natural gas tank car tank body.
For achieving the above object, the utility model adopts following technological scheme: a kind of split type LNG Liquefied natural gas tank car tank body interlayer pumped vacuum systems is characterized in that: comprise gas charging valve, nitrogen heater, Penning gauge, main valve, main pump, Pirani gauge A, holding pump, single-stage sliding vane rotary pump, Roots pump, bellows A, manual vacuum valve, Pirani gauge B, bellows B, manual vacuum butterfly valve, vacuum main line, connecting pipeline A, connecting pipeline B and connecting pipeline C.
The suction end of described holding pump is communicated with the outlet side of main pump by connecting pipeline A, and the suction end of main pump is communicated with connecting pipeline B by main valve, and connecting pipeline B is communicated with the outlet side of vacuum main line again, and described Pirani gauge A is located on the connecting pipeline A.Described Penning gauge is located on the connecting pipeline B.
The suction end of described single-stage sliding vane rotary pump is communicated with the outlet side of Roots pump, the suction end of Roots pump is communicated with connecting pipeline C by bellows A and manual vacuum valve, connecting pipeline C is communicated with the outlet side of vacuum main line again, and described Pirani gauge B is located on the connecting pipeline C.
The suction end of described vacuum main line is communicated with the vacuum sandwich of LNG Liquefied natural gas tank car tank body by bellows B and manual vacuum butterfly valve, and described nitrogen heater is communicated with the vacuum main line by gas charging valve.
Described main pump can be diffusion pump or molecular pump.
Compared with prior art the utlity model has following characteristics and beneficial effect: the utility model is specially for the design of the LNG Liquefied natural gas tank car tank body of inner bag multi-lay winding structure, and the LNG Liquefied natural gas tank car tank body that is suitably for very much inner bag multi-lay winding structure vacuumizes operation.The utility model can shorten the time that vacuumizes greatly, improves the effect vacuumize, and it is very high that the degree of vacuum of the vacuum sandwich in the LNG Liquefied natural gas tank car tank body can be kept, so solved the problem that the old technology pumpdown time is long, layer vacuum is low.
Description of drawings
The utility model is described in more detail below in conjunction with accompanying drawing.
Fig. 1 is structural representation of the present utility model.
Reference character: 1-LNG Liquefied natural gas tank car tank body, 2-gas charging valve, 3-nitrogen heater, 4-Penning gauge, 5-main valve, 6-main pump, 7-Pirani gauge A, 8-holding pump, 9-single-stage sliding vane rotary pump, 10-Roots pump, 11-bellows A, 12-manual vacuum valve, 13-Pirani gauge B, 14-bellows B, 15-manual vacuum butterfly valve, 16-vacuum main line, 17-connecting pipeline A, 18-connecting pipeline B, 19-connecting pipeline C, 20-vacuum sandwich.
Embodiment
Embodiment is referring to shown in Fig. 1-3, this split type LNG Liquefied natural gas tank car tank body interlayer pumped vacuum systems comprises gas charging valve 2, nitrogen heater 3, Penning gauge 4, main valve 5, main pump 6, Pirani gauge A7, holding pump 8, single-stage sliding vane rotary pump 9, Roots pump 10, bellows A11, manual vacuum valve 12, Pirani gauge B13, bellows B14, manual vacuum butterfly valve 15, vacuum main line 16, connecting pipeline A17, connecting pipeline B18 and connecting pipeline C19.
The suction end of described holding pump 8 is communicated with the outlet side of main pump 6 by connecting pipeline A17, the suction end of main pump 6 is communicated with connecting pipeline B18 by main valve 6, connecting pipeline B18 is communicated with the outlet side of vacuum main line 16 again, and described Pirani gauge A7 is located on the connecting pipeline A17.Described Penning gauge 4 is located on the connecting pipeline B18.
The suction end of described single-stage sliding vane rotary pump 9 is communicated with the outlet side of Roots pump 10, the suction end of Roots pump 10 is communicated with connecting pipeline C19 by bellows A11 and manual vacuum valve 12, connecting pipeline C19 is communicated with the outlet side of vacuum main line 16 again, and described Pirani gauge B is located on the connecting pipeline C19.
The suction end of described vacuum main line 16 is communicated with the vacuum sandwich 20 of LNG Liquefied natural gas tank car tank body 1 by bellows B14 and manual vacuum butterfly valve 15, and described nitrogen heater 3 is communicated with vacuum main line 16 by gas charging valve 2.
In the present embodiment, main pump 6 is diffusion pump or molecular pump, and holding pump 8 is the twin-stage sliding vane rotary pump, and the pump housing material of all pumps is cast iron or cast aluminium.
Working procedure of the present utility model is as follows.
The first step: the vacuum sandwich 20 of opening single-stage sliding vane rotary pump 9 and 10 pairs of LNG Liquefied natural gas tank car tank bodies 1 of Roots pump vacuumizes, behind the certain hour, close single-stage sliding vane rotary pump 9 and Roots pump 10, utilize 3 pairs of vacuum sandwichs of nitrogen heater 20 to carry out nitrogen replacement, repeat above operation 10 times, during utilize hot nitrogen that inner bag is uninterruptedly heated.
Second step: open 8 pairs of main pumps 6 of holding pump earlier and take out in advance, after the vacuum of main pump 6 outlet sides reaches 5Pa, start main pump 6 preheatings, then opening 10 pairs of tank bodies of single-stage sliding vane rotary pump 9 and Roots pump vacuumizes, when the degree of vacuum of vacuum interlayer 20 reaches 5Pa, and main pump 6 preheatings are after 40 minutes, close single-stage sliding vane rotary pump 9 and Roots pump 10, open main valve 5 then, utilize 6 pairs of vacuum sandwichs 20 of main pump to vacuumize, when vacuum interlayer 20 reach seal degree of vacuum after, LNG Liquefied natural gas tank car tank body 1 is sealed, and closes down main pump 6.
Claims (2)
1. a split type LNG Liquefied natural gas tank car tank body interlayer pumped vacuum systems is characterized in that: comprise gas charging valve (2), nitrogen heater (3), Penning gauge (4), main valve (5), main pump (6), Pirani gauge A(7), holding pump (8), single-stage sliding vane rotary pump (9), Roots pump (10), bellows A(11), manual vacuum valve (12), Pirani gauge B(13), bellows B(14), manual vacuum butterfly valve (15), vacuum main line (16), connecting pipeline A(17), connecting pipeline B(18) and connecting pipeline C(19);
The suction end of described holding pump (8) is by connecting pipeline A(17) be communicated with the outlet side of main pump (6), the suction end of main pump (6) is by main valve (6) and connecting pipeline B(18) be communicated with, connecting pipeline B(18) is communicated with the outlet side of vacuum main line (16) again, described Pirani gauge A(7) be located at connecting pipeline A(17) on, described Penning gauge (4) is located at connecting pipeline B(18) on;
The suction end of described single-stage sliding vane rotary pump (9) is communicated with the outlet side of Roots pump (10), the suction end of Roots pump (10) is by bellows A(11) and manual vacuum valve (12) and connecting pipeline C(19) be communicated with, connecting pipeline C(19) be communicated with described Pirani gauge B(13 with the outlet side of vacuum main line (16) again) be located at connecting pipeline C(19) on;
The suction end of described vacuum main line (16) is by bellows B(14) and manual vacuum butterfly valve (15) be communicated with the vacuum sandwich (20) of LNG Liquefied natural gas tank car tank body (1), described nitrogen heater (3) passes through gas charging valve (2) and is communicated with vacuum main line (16).
2. split type LNG Liquefied natural gas tank car tank body interlayer pumped vacuum systems according to claim 1, it is characterized in that: described main pump (6) is diffusion pump or molecular pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320154334 CN203190022U (en) | 2013-04-01 | 2013-04-01 | Interlayer vacuum pumping system for tank body of separated liquefied natural gas tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320154334 CN203190022U (en) | 2013-04-01 | 2013-04-01 | Interlayer vacuum pumping system for tank body of separated liquefied natural gas tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203190022U true CN203190022U (en) | 2013-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320154334 Expired - Fee Related CN203190022U (en) | 2013-04-01 | 2013-04-01 | Interlayer vacuum pumping system for tank body of separated liquefied natural gas tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203190022U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822085A (en) * | 2014-03-19 | 2014-05-28 | 北京华诚浩达真空空压设备有限公司 | Liquefied natural gas bottle sandwiching vacuum-pumping system and method with function of circularly heating inner container |
| CN111810833A (en) * | 2020-08-05 | 2020-10-23 | 杭州富士达特种材料股份有限公司 | Double-pass vacuum pumping system and method for vacuum multi-layer heat-insulation low-temperature container interlayer |
-
2013
- 2013-04-01 CN CN 201320154334 patent/CN203190022U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822085A (en) * | 2014-03-19 | 2014-05-28 | 北京华诚浩达真空空压设备有限公司 | Liquefied natural gas bottle sandwiching vacuum-pumping system and method with function of circularly heating inner container |
| CN103822085B (en) * | 2014-03-19 | 2016-01-13 | 北京华诚浩达真空空压设备有限公司 | Band inner bag hydronic liquefied natural gas bottle interlayer vacuum-pumping system and method |
| CN111810833A (en) * | 2020-08-05 | 2020-10-23 | 杭州富士达特种材料股份有限公司 | Double-pass vacuum pumping system and method for vacuum multi-layer heat-insulation low-temperature container interlayer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yu Kun Inventor after: Chen Nalun Inventor before: Ding Kun Inventor before: Chen Nalun |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: DING KUN CHEN RUOLUN TO: YU KUN CHEN RUOLUN |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130911 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |