CN106641707A - Efficient self-pressurized metering liquid nitrogen pump - Google Patents
Efficient self-pressurized metering liquid nitrogen pump Download PDFInfo
- Publication number
- CN106641707A CN106641707A CN201610877699.9A CN201610877699A CN106641707A CN 106641707 A CN106641707 A CN 106641707A CN 201610877699 A CN201610877699 A CN 201610877699A CN 106641707 A CN106641707 A CN 106641707A
- Authority
- CN
- China
- Prior art keywords
- liquid nitrogen
- outflow
- outflow tube
- pipe
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
- F17C2205/0332—Safety valves or pressure relief valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
- F17C2205/0335—Check-valves or non-return valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0135—Pumps
- F17C2227/0142—Pumps with specified pump type, e.g. piston or impulsive type
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses an efficient self-pressurized metering liquid nitrogen pump which comprises a sealing head, an outflow pipe and a pressurizing pipe. The outflow pipe and the pressurizing pipe are inserted in the sealing head in parallel. A data collector connected with a PC is arranged at the bottom of the pressurizing pipe. A heat insulation layer which is 5 mm in thickness is arranged at the outer portion of the outflow pipe so that heat exchange between air and the pressurizing pipe can be prevented, and it is ensured that liquid nitrogen stably flows out from the outflow pipe. A safety valve and a check valve are sequentially arranged on the outflow pipe. A flow meter is arranged on the pressurizing pipe. The air flow is adjusted through the flow meter so that the flowing speed of the liquid nitrogen in the outflow pipe can be adjusted. The data collector sends collected total mass data to the PC, the mass flowing speed of the liquid nitrogen in the outflow pipe is displayed through software data processing, and the liquid nitrogen is adjusted under cooperation of the flow meter to achieve even-speed outflow. Fierce heat exchange, caused by a concentric tube between air and outflow liquid nitrogen, between the air and the outflow liquid nitrogen in a traditional liquid nitrogen pump is avoided, excessive vaporization of the liquid nitrogen in the outflow pipe can be prevented, and the liquid nitrogen outflow quality and speed are improved. The efficient self-pressurized metering liquid nitrogen pump is simple in structure, convenient to operate and good in use effect.
Description
Technical field
The present invention relates to a kind of liquid nitrogen pump from supercharging, especially a kind of suitable for efficiently going out to flow dividing for function with liquid nitrogen
From formula from positive battery metering liquid nitrogen pump.
Background technology
Traditional liquid nitrogen pump using outflow tube and pressure inlet concentric tube configuration, in intake process, normal temperature air is from interior
Pipe or outer tube are flowed into, and low temperature liquid nitrogen is flowed out by outer tube or inner tube, and strong heat transfer process, a side occur between air and liquid nitrogen
Face, causes normal temperature air to be cooled down by liquid nitrogen, and temperature is reduced, it is suppressed that normal temperature air is entered acutely to be exchanged heat in liquid nitrogen container and produces nitrogen
Process, and make pressure inside the tank raise it is slack-off, affect discharge velocity.On the other hand, low temperature liquid nitrogen is caused to be heated by normal temperature air
Vaporization, increases the nitrogen gas component in outflow tube, does not reach requirement of the experimental provision to liquid nitrogen component.
The content of the invention
Technical problem：The invention aims to overcome at deficiency of the prior art, there is provided a kind of simple structure, peace
Entirely, fast, efficiently, can prevent from being pressurized in outflow tube liquid nitrogen vaporization and tank slow efficient from positive battery metering liquid nitrogen pump.
Technical scheme：The present invention's is efficient from positive battery metering liquid nitrogen pump, including seal head, is inserted into parallel on seal head
Outflow tube and the pressure inlet being connected with booster pump, the bottom of pressure inlet is provided with the data acquisition unit being connected with PC, and described goes out stream
Pipe is externally provided with the thick heat-insulation layers of 5mm, to prevent the heat exchange between air and pressure inlet, it is ensured that liquid nitrogen stationary flow from outflow tube
Go out；Safety valve and non-return valve are sequentially provided with outflow tube, described pressure inlet is provided with flowmeter, by flowmeter air is adjusted
Flow, and then the flow velocity of liquid nitrogen in outflow tube is adjusted, by data acquisition unit by the total mass number of collection according to PC is delivered to, Jing is soft
The process of part simple data shows the mass velocity of liquid nitrogen in outflow tube, and coordinates flowmeter regulation liquid nitrogen to realize at the uniform velocity going out stream.
Multiple sealing rings are provided between described seal head and closure sealing container.
The external diameter of the pressure inlet is 6mm, and wall thickness is 1mm.
The bottom of described pressure inlet is higher than 10～15 centimetres of liquid nitrogen outflow tube.
Described outflow tube external diameter is 10mm, and wall thickness is 1mm.
Described data acquisition unit is large range high precision collector, and its range is 100kg, and precision is 2g.
Beneficial effect：As a result of above-mentioned technical proposal, separate type turnover stream design of the present invention effectively prevent supercharging
The heat exchange between the low temperature liquid nitrogen in normal temperature air and outflow tube in pipe, it is ensured that the air themperature in pressure inlet is constant, really
Protect air and produce violent boiling heat transfer phenomenon into after liquid nitrogen container, while, it is therefore prevented that liquid nitrogen is excessively vaporized in outflow tube, is realized
The safety and stability of liquid nitrogen goes out stream.Pressure is provided by mechanical supercharged pump, flow is adjusted by flowmeter.Go out to flow device and be provided with safety
Valve and non-return valve, it is ensured that the stable safe operation of outflow conduit.By the way that normal temperature air is pumped into inside liquid nitrogen container, liquid nitrogen vapour is caused
Change supercharging, liquid nitrogen container bottom liquid nitrogen can be extruded container, and flow velocity is monitored by data acquisition unit, and then with flowmeter control
Liquid nitrogen discharge velocity.The present invention's goes out stream and is provided separately and is thermally insulated from supercharging, it is to avoid in traditional liquid nitrogen pump, because
The concentric tube configuration of the two and cause air and go out between flow liquid nitrogen acutely to exchange heat, excessive vapour of the liquid nitrogen in outflow tube can be prevented
Change, so as to substantially increase liquid nitrogen current mass and speed are gone out.Its simple structure, easy to operate, using effect is good, with prior art
The advantage compared is as follows：
1. the thermal insulation of low temperature liquid nitrogen in outflow tube and normal temperature air realized, it is ensured that liquid nitrogen goes out current mass；
2. guarantee that the normal temperature air in pressure inlet is not cooled down by low temperature liquid nitrogen, into after liquid nitrogen container with liquid nitrogen generation acutely boiling
Heat exchange is risen, and then ensure that pumping rate；
3. liquid nitrogen discharge velocity can be monitored by data acquisition unit and PC softwares；
4. by the adjustable liquid nitrogen discharge velocity of flowmeter, it is ensured that go out the stability of stream；
5. the cooperation of various valves can ensure that safe transport of the liquid nitrogen in out of flow procedure.
Description of the drawings
Fig. 1 is the structural representation of the present invention.
In figure：1- seal heads, 2- outflow tubes, 3- safety valves, 4- non-return valves, 5- flowmeters, 6- pressure inlets, 7- sealing rings,
8- data acquisition units.
Specific embodiment
The invention will be further described for embodiment in below in conjunction with the accompanying drawings：
The present invention's is efficient from positive battery metering liquid nitrogen pump, mainly by seal head 1, outflow tube 2, pressure inlet 6 and data acquisition
Device 8 is constituted, seal head 1, the outflow tube 2 being inserted into parallel on seal head 1 and the pressure inlet 6 being connected with booster pump, pressure inlet 6
Bottom be provided with the data acquisition unit 8 being connected with PC, the bottom of described pressure inlet 6 is higher than 10～15 centimetres of liquid nitrogen outflow tube.
Described outflow tube 2 is externally provided with the thick heat-insulation layers of 5mm, to prevent the heat exchange between air and pressure inlet, it is ensured that liquid nitrogen is from going out
Stably flow out in flow tube 2；The described external diameter of outflow tube 2 is 10mm, and wall thickness is 1mm.Described seal head 1 and closure sealing container
Between be provided with multiple sealing rings 7.Safety valve 3 and non-return valve 4 are sequentially provided with outflow tube 2, described non-return valve 4 can prevent liquid nitrogen
Flow backwards.Pressure in the control outflow tube 2 of safety valve 3 is less than rated value, to prevent hypertonia, causes device damage and threat
Personal safety.Described pressure inlet 6 is provided with flowmeter 5, and the external diameter of pressure inlet 6 is 6mm, and wall thickness is 1mm.By flowmeter 5
The flow velocity of liquid nitrogen in air mass flow, and then regulation outflow tube is adjusted, total mass number evidence is delivered to by PC, Jing by data acquisition unit 8
Software data process shows the mass velocity of liquid nitrogen in outflow tube, by the quality for going out stream with the controllable liquid nitrogen of the cooperation of flowmeter
Flow.Described data acquisition unit 8 is large range high precision collector, and its range is that precision is 2g to 100kg.
Operation principle：Booster pump pumps air into pressure inlet 6, and air Jing flowmeters 5 are entered in liquid nitrogen container, the flow of air
It is displayed on flowmeter 5, and liquid nitrogen outflow tube 2 can be reached by adjusting the flow of the control air inlet of flowmeter 5 and stably goes out stream
Purpose.Run into low temperature liquid nitrogen in tank into the normal temperature air in liquid nitrogen container and acutely heat exchange occur, liquid nitrogen absorb heat rapid vaporization into
Nitrogen, volumetric expansion increases the pressure in liquid nitrogen container, meanwhile, the air for pumping into also functions to certain pressurization.Pressure inlet
6 bottoms are respectively arranged in different levels from the bottom of outflow tube 2, and this is to prevent liquid-nitrogen boiling from entering outflow tube 2 to liquid nitrogen
Cause disturbance.Thus liquid nitrogen smoothly enters outflow tube 2 under interior extraneous differential pressure action, experimental facilities or instrument are flowed into.Outflow tube 2
Outsourcing heat-insulation layer, carries out insulation, prevents from being exchanged heat between the liquid nitrogen in outflow tube and the external world.The flow velocity of liquid nitrogen in outflow tube 2
Can be by the flowmeter 5 on pressure inlet 6 and the indirect control of data acquisition unit 8, it is ensured that liquid nitrogen stably goes out stream.
Claims (6)
1. one kind is efficiently from positive battery metering liquid nitrogen pump, it is characterised in that：It includes seal head（1）, be parallel inserted into seal head（1）
On outflow tube（2）And the pressure inlet being connected with booster pump（6）, pressure inlet（6）Bottom be provided with the data acquisition being connected with PC
Device（8）, described outflow tube（2）The thick heat-insulation layers of 5mm are externally provided with, to prevent the heat exchange between air and pressure inlet, it is ensured that
Liquid nitrogen is from outflow tube（2）Interior stable outflow；Outflow tube（2）On be sequentially provided with safety valve（3）And non-return valve（4）；Described supercharging
Pipe（6）It is provided with flowmeter（5）, by flowmeter（5）The flow velocity of liquid nitrogen in air mass flow, and then regulation outflow tube is adjusted, is led to
Cross data acquisition unit（8）Total mass number is shown into the mass velocity of liquid nitrogen in outflow tube according to PC, the process of Jing software datas is delivered to, and
Coordinate flowmeter to adjust liquid nitrogen to realize at the uniform velocity going out stream.
2. according to claim 1. one kind is efficiently from positive battery metering liquid nitrogen pump, it is characterised in that：Described seal head（1）
Multiple sealing rings are provided between closure sealing container（7）.
3. according to described in claim 1. one kind is efficiently from positive battery metering liquid nitrogen pump, it is characterised in that：The pressure inlet（5）It is outer
Footpath is 6mm, and wall thickness is 1mm.
4. according to the one kind described in claim 1 efficiently from positive battery metering liquid nitrogen pump, it is characterised in that：Described pressure inlet（6）'s
Bottom is higher than liquid nitrogen outflow tube（2）10 ~ 15 centimetres.
5. according to described in claim 1. one kind is efficiently from positive battery metering liquid nitrogen pump, it is characterised in that：Described outflow tube（2）Outward
Footpath is 10mm, and wall thickness is 1mm.
6. according to the one kind described in claim 1 efficiently from positive battery metering liquid nitrogen pump, it is characterised in that：Described data acquisition unit
（8）For large range high precision collector, its range is 100kg, precision is 2g。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610877699.9A CN106641707A (en) | 2016-10-08 | 2016-10-08 | Efficient self-pressurized metering liquid nitrogen pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610877699.9A CN106641707A (en) | 2016-10-08 | 2016-10-08 | Efficient self-pressurized metering liquid nitrogen pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106641707A true CN106641707A (en) | 2017-05-10 |
Family
ID=58853758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610877699.9A Pending CN106641707A (en) | 2016-10-08 | 2016-10-08 | Efficient self-pressurized metering liquid nitrogen pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106641707A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572680A (en) * | 2018-04-23 | 2018-09-25 | 上海交通大学 | A kind of liquid nitrogen voltage stabilizing goes out to flow temperature regulating device |
| CN110193335A (en) * | 2019-05-27 | 2019-09-03 | 衢州市沃德仪器有限公司 | A kind of high/low temperature reacting furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572680A (en) * | 2018-04-23 | 2018-09-25 | 上海交通大学 | A kind of liquid nitrogen voltage stabilizing goes out to flow temperature regulating device |
| CN110193335A (en) * | 2019-05-27 | 2019-09-03 | 衢州市沃德仪器有限公司 | A kind of high/low temperature reacting furnace |
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Application publication date: 20170510 |
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