CN105386954A - High-pressure liquid nitrogen pump - Google Patents
High-pressure liquid nitrogen pump Download PDFInfo
- Publication number
- CN105386954A CN105386954A CN201510828319.8A CN201510828319A CN105386954A CN 105386954 A CN105386954 A CN 105386954A CN 201510828319 A CN201510828319 A CN 201510828319A CN 105386954 A CN105386954 A CN 105386954A
- Authority
- CN
- China
- Prior art keywords
- oil
- pump
- plunger
- valve
- liquid nitrogen
- 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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/06—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure
- F04B15/08—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure the liquids having low boiling points
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/18—Lubricating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/06—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure
- F04B15/08—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure the liquids having low boiling points
- F04B2015/081—Liquefied gases
- F04B2015/0824—Nitrogen
Abstract
The invention relates to the technical field of liquid nitrogen pumps, in particular to a high-pressure liquid nitrogen pump. The high-pressure liquid nitrogen pump comprises a transmission box and a pump body. The transmission box comprises a crankshaft and a connecting rod. The pump body comprises a pump cavity, a plunger arranged in the pump cavity, a liquid outlet valve communicated with the pump cavity and a liquid inlet valve communicated with the pump cavity. The transmission box outputs power to the connecting rod through the crankshaft, the connecting rod is arranged to be capable of driving the plunger to do reciprocating motion, the liquid outlet valve is arranged to be capable of being connected during inward pressing of the plunger, and the liquid inlet valve is arranged to be capable of being connected during outward drawing of the plunger. The liquid outlet pressure can be 40.0-120.0 MPa, and therefore the high-pressure liquid nitrogen pump is suitable for oil well operation processes.
Description
Technical field
The present invention relates to liquid nitrogen pump technical field, specifically, relate to a kind of high-pressure liquid nitrogen pump.
Background technique
At present, conventional liquid nitrogen pump is mainly in order to give liquid nitrogen supercharging, and be commonly used to gasification and fill a bottle technique, its fluid pressure is no more than 16.5MPa usually.The working procedure of conventional liquid nitrogen pump is mainly divided into two processes: 1, plunger outward is extracted out, and airtight pump chamber inside is in negative pressure, and feed liquor check valve spring power is overcome, and feed liquor one-way valve is opened, and it is inner that liquid flows into pump chamber; 2, plunger inwardly compresses, feed liquor closed check valve, and to liquid pressing in the process that plunger is inwardly pressed, when pressure exceedes the spring force of fluid one-way valve, liquid valve is opened; And so forth, thus realize to liquid nitrogen supercharging.
Existing high-pressure liquid nitrogen pump is mainly used in oil well operation technique, and its fluid pressure is usually between 40.0MPa to 120.0MPa.Because high-pressure liquid nitrogen pumps the increase of hydraulic coupling, the driving mechanism of its power end, the stressed increase of the piston of motion, and in existing design, the lubrication of moving element and abrading parts, lubricating oil temperature can not ensure the normal operation of driving mechanism.In addition, the structure of the liquid feed valve on pump head (cold junction), liquid valve, piston can not ensure that high-pressure liquid nitrogen pump can reliably working.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals:
A kind of high-pressure liquid nitrogen pump, it comprises transmission case and the pump housing, and transmission case comprises crankshaft-and-connecting-rod, and the pump housing comprises pump chamber, the plunger be located in pump chamber, the liquid valve be communicated with pump chamber and liquid feed valve; Transmission case is by bent axial links outputting power, and connecting rod construction becomes can drive plunger reciprocates, can conducting when liquid valve is configured to pressure in plunger, can conducting when liquid feed valve is configured to take out outside plunger.
Transmission case of the present invention comprises crankshaft-and-connecting-rod, the power of transmission case can be exported by bent axle, connecting rod can be set on bent axle, thus realize bent axial links outputting power, this structure makes, owing to adopting coordinating of bent axle and connecting rod, make transmission case working procedure comparatively steady, reduce the vibration of transmission case working procedure generation.In addition, adopt the type of belt drive of crankshaft-and-connecting-rod, the loss of the idle work of transmission case can be greatly reduced, thus greatly improve the working efficiency of transmission case.
As preferably, connecting rod is connected by a crosshead with plunger.
Connecting rod of the present invention can be connected by such as crosshead with plunger, and the convenient connection achieving connecting rod and plunger easily, makes connecting rod preferably to drive plunger reciprocating.
As preferably, liquid valve comprises the first spool and the first spring, and the first spool is pressed on the connecting port of liquid valve and pump chamber by the first spring.
Liquid valve of the present invention can comprise such as the first spool and the first spring, and wherein, the first spool can be pressed on the connecting port of liquid valve and pump chamber by the first spring.When taking out outside plunger, liquid valve can remain off state, and liquid can not leak in pump chamber from liquid valve; When pressing in plunger, the liquid in pump chamber can to the first spool effect, and the first spool overcomes the first spring force and makes liquid valve conducting, thus achieves the function of increasing pressure of the pump housing.This structure of liquid valve makes, and the present invention can preferably make the fluid pressure of the pump housing reach high pressure, as between 40.0MPa to 120.0MPa.
As preferably, liquid feed valve comprises valve seat, the second spool and the second spring, valve seat inside is provided with the feed liquor runner be communicated with pump chamber, second spool is configured to outwards be compressed by the second spring through the valve seat part of stretching out after feed liquor runner from inner side, and second spool one end is configured for the sealing head sealing side runner mouth in feed liquor runner.
The present invention is by the cooperation of valve seat, the second spool and the second spring, liquid feed valve conducting when can make to take out outside plunger, thus make liquid to enter pump chamber, and when liquid feed valve cut-off during pressure in plunger, thus the liquid in pump chamber can be flowed out from liquid valve after supercharging.
As preferably, outside liquid feed valve, be provided with pan.
Can be provided with outside liquid feed valve of the present invention and such as cross pan, such a construction ensures the purity entering pump intracavity liquid, preferably avoid the generation of the situations such as runner blocking.
As preferably, the large end of connecting rod and small end place are respectively equipped with the first oil-way system and the second oil-way system.
The large end of connecting rod of the present invention and small end place can be respectively equipped with such as the first oil-way system and the second oil-way system, this makes the joint of the joint of connecting rod and bent axle and connecting rod and crosshead can supply lubricant oil respectively by the first oil-way system and the second oil-way system to them, thus preferably avoid the wearing and tearing of transmission case moving element, add the working life of transmission case moving element.In addition, owing to adopting oil-way system supply lubricant oil, which greatly simplifies the internal structure of transmission case motion, the follow-up maintenance of aspect to transmission case motion.
As preferably, the first oil-way system and the second oil-way system are all by a gear oil pump fuel feeding, and the oil in the first oil-way system and the second oil-way system is back to gear oil pump place through an oil strainer, an oil cooler successively.
Can by gear oil pump to they fuel feeding on first oil-way system of the present invention and the second oil-way system, this makes the lubricant oil in the first oil-way system and the second oil-way system can splash to corresponding part place, thus ensure that the joint of connecting rod and bent axle and the joint of connecting rod and crosshead all can omnibearingly be lubricated.Oil in first oil-way system of the present invention and the second oil-way system can be back to gear oil pump place through oil strainer and oil cooler successively, this structure makes, in transmission case, the lubricant oil of backflow can be filtered by oil strainer thus ensure that the purity of backflow lubricant oil, in addition, oil cooler can the lubricant oil of cooling for reflux in time, thus ensure that the temperature of lubricant oil preferably can be suitable for the power mechanism in lubricating transmission case.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of high-pressure liquid nitrogen pump in embodiment 1;
Fig. 2 is the schematic diagram of embodiment 1 middle pump body;
Fig. 3 is the schematic diagram of transmission case in embodiment 1;
Fig. 4 is the cooperation schematic diagram of oil strainer 410 in embodiment 1, gear oil pump 420 and oil cooler 430.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Embodiment 1
As shown in Figure 1, be a kind of in the present embodiment schematic diagram of high-pressure liquid nitrogen pump.It comprises transmission case 110 and the pump housing 120, and transmission case 110 comprises bent axle 111 and connecting rod 112, and the pump housing 120 comprises pump chamber 124, the plunger 121 be located in pump chamber 124, the liquid valve 122 be communicated with pump chamber 124 and liquid feed valve 123.Transmission case 110 imports power into from belt pulley 130, and transmission case 110 passes through bent axle 111 to connecting rod 112 outputting power.Connecting rod 112 is connected with plunger 121 by crosshead 113, thus makes connecting rod 112 can drive plunger 121 to-and-fro motion.Can conducting when liquid valve 122 is configured to pressure in plunger 121, can conducting when liquid feed valve 123 is configured to take out outside plunger 121.
As shown in Figure 2, be the schematic diagram of the present embodiment middle pump body 120.Wherein, liquid valve 122 comprises the first spool 211 and the first spring 212, first spring 212 and first spool 211 is pressed on liquid valve 122 with on the connecting port of pump chamber 124.Liquid feed valve 123 comprises valve seat 220, second spool 230 and the second spring 240, valve seat 220 inside is provided with the feed liquor runner be communicated with pump chamber 124, second spool 230 is configured to outwards be compressed by the second spring 240 through valve seat 220 part of stretching out after feed liquor runner from inner side, and second spool 230 one end is configured for the sealing head 231 sealing side runner mouth in feed liquor runner.Pan 250 was provided with outside liquid feed valve 123.
As shown in Figure 3, be the schematic diagram of transmission case in the present embodiment 110.Wherein, the large end of connecting rod 112 and small end place are respectively equipped with the first oil-way system 310 and the second oil-way system 320, first oil-way system 310 is for supplying lubricant oil to connecting rod 112 and the joint of bent axle 111, and the second oil-way system 320 is for supplying lubricant oil to connecting rod 112 and the joint of crosshead 113.
As shown in Figure 4, the first oil-way system 310 and the second oil-way system 320 are all by gear oil pump 420 fuel feeding, and the oil in the first oil-way system 310 and the second oil-way system 320 is back to gear oil pump 420 place through oil strainer 410, oil cooler 430 successively.
In the present embodiment, bent axle 111 place is connected with 2 identical connecting rod 112,2 connecting rods 112 and drives plunger 121 by 2 different crossheads 113 respectively, owing to adopting 2 connecting rods 112, the transmission case 110 of the present embodiment can be worked more reposefully.
A kind of high-pressure liquid nitrogen pump of the present invention is when normally working, and belt pulley 130 is driven by power mechanism thus to transmission case 110 input power, transmission case 110 power is exported by bent axle 111 and transmits to plunger 121 through 2 connecting rods 112.Along with the to-and-fro motion of plunger 121, the pump housing 120 is following two processes back and forth:
1, feed liquor process, when plunger 121 detaches pump chamber 124, in negative pressure state in pump chamber 124, make the first spool 211 of liquid valve 122 remain off state under the effect of the first spring 212, the elastic force that second spool 230 overcomes the second spring 240 is to displacement inside pump chamber 124, and now, sealing head 231 is separated with feed liquor runner, thus feed liquor runner is switched on, liquid nitrogen flows in pump chamber 124 via feed liquor runner;
2, fluid process, when plunger 121 presses in pump chamber 124, liquid nitrogen in pump chamber 124 plunger 121 that is under pressure acts on, remain off under the effect that second spool 230 is pressed in the second spring 240 and pump chamber 124, the elastic force of the first spring 212 is overcome and conducting under the effect that first spool 211 is pressed in pump chamber 124, along with inside contracting gradually of plunger 121, the liquid nitrogen in pump chamber 124 flows out from liquid valve 122 gradually.
Achieve the function of increasing pressure of a kind of high-pressure liquid nitrogen pump in this enforcement via above-mentioned 2 processes, in addition, due to the improvement of configuration aspects, make the fluid pressure of a kind of high-pressure liquid nitrogen pump in this enforcement to reach 40.0MPa ~ 120.0MPa.
In a word, the foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (6)
1. a high-pressure liquid nitrogen pump, it comprises transmission case (110) and the pump housing (120), transmission case (110) comprises bent axle (111) and connecting rod (112), and the pump housing (120) comprises pump chamber (124), the plunger (121) be located in pump chamber (124), the liquid valve (122) be communicated with pump chamber (124) and liquid feed valve (123); Transmission case (110) by bent axle (111) to connecting rod (112) outputting power, connecting rod (112) is constructed to be permeable to drive plunger (121) to-and-fro motion, can conducting when liquid valve (122) is configured to pressure in plunger (121), can conducting when liquid feed valve (123) is configured to take out outside plunger (121); Connecting rod (112) is connected by a crosshead (113) with plunger (121).
2. a kind of high-pressure liquid nitrogen pump according to claim 1, it is characterized in that: liquid valve (122) comprises the first spool (211) and the first spring (212), the first spool (211) is pressed on liquid valve (122) with on the connecting port of pump chamber (124) by the first spring (212).
3. a kind of high-pressure liquid nitrogen pump according to claim 1 and 2, it is characterized in that: liquid feed valve (123) comprises valve seat (220), the second spool (230) and the second spring (240), valve seat (220) inside is provided with the feed liquor runner be communicated with pump chamber (124), second spool (230) is configured to outwards be compressed by the second spring (240) through valve seat (220) part of stretching out after feed liquor runner from inner side, and the second spool (230) one end is configured for the sealing head (231) sealing side runner mouth in feed liquor runner.
4. a kind of high-pressure liquid nitrogen pump according to claim 3, is characterized in that: liquid feed valve (123) outside was provided with pan (250).
5. a kind of high-pressure liquid nitrogen pump according to claim 1, is characterized in that: the large end of connecting rod (112) and small end place are respectively equipped with the first oil-way system (310) and the second oil-way system (320).
6. a kind of high-pressure liquid nitrogen pump according to claim 5, it is characterized in that: the first oil-way system (310) and the second oil-way system (320) are all by a gear oil pump (420) fuel feeding, and the oil in the first oil-way system (310) and the second oil-way system (320) is back to gear oil pump (420) place through an oil strainer (410), an oil cooler (430) successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510828319.8A CN105386954A (en) | 2015-11-24 | 2015-11-24 | High-pressure liquid nitrogen pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510828319.8A CN105386954A (en) | 2015-11-24 | 2015-11-24 | High-pressure liquid nitrogen pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105386954A true CN105386954A (en) | 2016-03-09 |
Family
ID=55419592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510828319.8A Pending CN105386954A (en) | 2015-11-24 | 2015-11-24 | High-pressure liquid nitrogen pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105386954A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626511A (en) * | 2016-03-21 | 2016-06-01 | 浙江中煤机械科技有限公司 | Plunger pump |
| CN107448370A (en) * | 2017-06-23 | 2017-12-08 | 韦达 | Ultralow temperature extra-high voltage liquid hydrogen pump |
| CN108547766A (en) * | 2018-05-29 | 2018-09-18 | 烟台杰瑞石油装备技术有限公司 | A kind of liquid nitrogen pump power end assembly |
| CN113683137A (en) * | 2021-09-03 | 2021-11-23 | 无锡市第五人民医院 | Clinical laboratory uses waste liquid treatment device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08219018A (en) * | 1995-02-13 | 1996-08-27 | Nippon F C I:Kk | Hydraulic pump capable of changing over between high and low pressure |
| CN2339815Y (en) * | 1997-10-07 | 1999-09-22 | 李肇伦 | Super-high-pressure plunger pump one-way valve |
| CN102889191A (en) * | 2011-07-21 | 2013-01-23 | 烟台杰瑞石油装备技术有限公司 | Plunger pump used for pumping ultralow-temperature liquid nitrogen |
| CN104481868A (en) * | 2014-09-15 | 2015-04-01 | 宝鸡航天动力泵业有限公司 | Oil circuit of power end pressure lubrication system of reciprocating pump |
| CN104564653A (en) * | 2014-12-30 | 2015-04-29 | 米顿罗工业设备（上海）有限公司 | Plunger reciprocating pump with built-in pressure lubricating oil passage |
-
2015
- 2015-11-24 CN CN201510828319.8A patent/CN105386954A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08219018A (en) * | 1995-02-13 | 1996-08-27 | Nippon F C I:Kk | Hydraulic pump capable of changing over between high and low pressure |
| CN2339815Y (en) * | 1997-10-07 | 1999-09-22 | 李肇伦 | Super-high-pressure plunger pump one-way valve |
| CN102889191A (en) * | 2011-07-21 | 2013-01-23 | 烟台杰瑞石油装备技术有限公司 | Plunger pump used for pumping ultralow-temperature liquid nitrogen |
| CN104481868A (en) * | 2014-09-15 | 2015-04-01 | 宝鸡航天动力泵业有限公司 | Oil circuit of power end pressure lubrication system of reciprocating pump |
| CN104564653A (en) * | 2014-12-30 | 2015-04-29 | 米顿罗工业设备（上海）有限公司 | Plunger reciprocating pump with built-in pressure lubricating oil passage |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626511A (en) * | 2016-03-21 | 2016-06-01 | 浙江中煤机械科技有限公司 | Plunger pump |
| CN107448370A (en) * | 2017-06-23 | 2017-12-08 | 韦达 | Ultralow temperature extra-high voltage liquid hydrogen pump |
| CN108547766A (en) * | 2018-05-29 | 2018-09-18 | 烟台杰瑞石油装备技术有限公司 | A kind of liquid nitrogen pump power end assembly |
| CN113683137A (en) * | 2021-09-03 | 2021-11-23 | 无锡市第五人民医院 | Clinical laboratory uses waste liquid treatment device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160309 |
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| RJ01 | Rejection of invention patent application after publication |