CN209228602U - A kind of high pressure low temperature reciprocating pump cold end - Google Patents
A kind of high pressure low temperature reciprocating pump cold end Download PDFInfo
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- CN209228602U CN209228602U CN201821698666.9U CN201821698666U CN209228602U CN 209228602 U CN209228602 U CN 209228602U CN 201821698666 U CN201821698666 U CN 201821698666U CN 209228602 U CN209228602 U CN 209228602U
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- compression
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Abstract
The utility model discloses a kind of high pressure low temperature reciprocating pump cold ends, are related to reciprocating pump cold end technical field.Including liquid feeding end component, outlet end component, compression chamber component, liquid storage chamber and the cold end pump housing for accommodating compression chamber component and liquid storage chamber, the compression chamber component includes piston rod and compression chamber cavity, the compression chamber cavity is provided with one stage of compression cavity and two-stage compression cavity, liquid enters liquid storage chamber by the liquid feeding end component, then enter one stage of compression cavity in the case where the promotion of piston rod is made, two-stage compression cavity is entered by level-one liquid valve in the case where the pulling of piston rod is made, piston rod push away effect under two-stage compression cavity liquid by outlet end component flow out.Applied to liquid hydrogen or low device net positive suction head NPSHa working environment, working service is convenient.
Description
Technical field
The utility model relates to the industries such as reciprocal pump technical field more particularly to a kind of chemical industry, industrial and mining enterprises, national defence scientific research
The cold end of required, high pressure, low temperature reciprocating pump.
Technical background
General low temperature reciprocating pump cold end mainly uses single stage compress structure at present, when reciprocal pump work, only carries out to liquid
Primary pressurization, conveying, volumetric efficiency is low, is not suitable for low-density medium: such as liquid hydrogen or low device net positive suction head NPSHa environment；
Feed liquor, return-air adapter tube are on the pump housing, and inlet is arranged in one jiao of cold end side or lower part, and gas returning port is arranged in cold end side
Or one jiao of top, it is smaller with working portion distance, it is low by specific gravity of gas and realize gas-liquid separation；Friction pair has piston rod and fills out
Material sealing, piston ring and cylinder, cylinder have abrasion after being used for a long time, need to change, and maintenance is complicated.And it is situated between for low-density
Matter: under liquid hydrogen or low device net positive suction head NPSHa working environment, the use of traditional low temperature reciprocating pump also has problem, such as
Pump housing corrosion etc..
Utility model content
The utility model provides a kind of high pressure low temperature reciprocating pump cold end, and using Two-stage Compression, reasonable Arrangement feed liquor is returned
Gas goes out liquid adapter tube position, improves its cavitation resistive property, is applied to liquid hydrogen or low device net positive suction head NPSHa working environment, with
Solve above-mentioned root problem.
The technical solution that the utility model solves the above problems is: a kind of high pressure low temperature reciprocating pump cold end is provided, including into
Liquid end component, outlet end component, compression chamber component, liquid storage chamber and the cold end pump housing for accommodating compression chamber component and liquid storage chamber, institute
Stating compression chamber component includes piston rod and compression chamber cavity, and the compression chamber cavity is provided with one stage of compression cavity and two-stage compression
Cavity, liquid enter liquid storage chamber by the liquid feeding end component, then enter one stage of compression chamber in the case where the promotion of piston rod is made
Body enters two-stage compression cavity by level-one liquid valve in the case where the pulling of piston rod is made, in the second level pressure under pushing away effect of piston rod
The liquid of contracting cavity is flowed out by outlet end component.
Preferably, the liquid feeding end component includes feed liquor pipe fitting and inlet tube collar nut, further includes being arranged in feed liquor
The feed liquor sealing element of pipe fitting endface.
It preferably, further include the mistake to be connected to liquid storage chamber and one stage of compression cavity being arranged on the wall of liquid storage chamber inner cavity
Discharge orifice.
It preferably, further include the return-air interface being arranged in above liquid feeding end component.
It preferably, further include being arranged in compression chamber cavity and around the seal assembly of piston rod setting.
Preferably, the first seal assembly of pressure produced by the seal assembly includes to seal one stage of compression and to
Seal the second seal assembly of pressure caused by two-stage compression.
It preferably, further include being set on the piston rod to reinforce piston rod operation stability and sustainable first close
The pump housing flange of sealing assembly.
Preferably, it is connected to a fixed between the pump housing flange and the cold end pump housing with fixing bolt and with pump housing sealing element guarantor
Hold the leakproofness of its connection.
It preferably, further include the reducer unit that is arranged in one stage of compression cavity and can be connected to liquid storage chamber.
It preferably, further include the overflow ducts being arranged at the first seal assembly to be connected to liquid storage chamber.
The utility model has the beneficial effects that the utility model uses Two-stage Compression, reasonable Arrangement feed liquor, return-air, outlet end
Position is taken over, its cavitation resistive property is improved, is applied to liquid hydrogen or low device net positive suction head NPSHa working environment.And feed liquor, return
Gas interface is in liquid storage chamber top, and return-air interface top is at the highest notch, and is conducive to gas-liquid quick separating, improve pump into
Liquid speed degree.Hermetic unit is high-pressure section and low-pressure section, seals pressure caused by second level and one stage of compression, Suo Youdong respectively
Sealing generates between piston rod and sealing element, and when maintenance only needs to change sealing element or piston rod, easy to maintain.
Detailed description of the invention
Fig. 1 is a kind of high pressure low temperature reciprocating pump cold end structure figure of the utility model specific embodiment,
Fig. 2 is a kind of inlet tube joint structure of high pressure low temperature reciprocating pump cold end of the specific embodiment of the invention.
1- liquid feeding end component, 11- feed liquor pipe fitting, 12- collar nut, 13- feed liquor sealing element, 2- outlet end component, 3-
Compression chamber component, 31- piston rod, 32- compression chamber cavity, 321- one stage of compression cavity, 322- two-stage compression cavity, 331- first
Seal assembly, the second seal assembly of 332-, 4- liquid storage chamber, 41- flowing hole, 42- reducer unit, the 5- cold end pump housing, 6- return-air connect
Mouthful, 7- pump housing flange, 71- fixing bolt, 72- pump housing sealing element.
Specific embodiment
In order to illustrate more clearly of the utility model embodiment and technical solution in the prior art, attached drawing will be compareed below
Illustrate specific embodiment of the present utility model.It should be evident that the accompanying drawings in the following description is only the one of the utility model
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings, and obtains other embodiments, and the utility model is not restricted to the embodiment.
Please refer to Fig. 1, Fig. 2, a kind of high pressure low temperature reciprocating pump cold end of the utility model specific embodiment, including liquid feeding end
Component 1, outlet end component 2, compression chamber component 3, liquid storage chamber 4 and the cold end pump housing 5 for accommodating compression chamber component 3 and liquid storage chamber 3,
The compression chamber component 3 includes piston rod 31 and compression chamber cavity 32, and the compression chamber cavity 32 is provided with one stage of compression cavity
321 and two-stage compression cavity 322, liquid liquid storage chamber 4 is entered by the liquid feeding end component 1, then pushing away in piston rod 31
Movement is lower to enter one stage of compression cavity 321, enters two-stage compression cavity by level-one liquid valve in the case where the pulling of piston rod 31 is made
322, piston rod 31 push away effect under two-stage compression cavity 322 liquid by outlet end component 2 flow out.
The liquid feeding end component 1 includes feed liquor pipe fitting 11 and inlet tube collar nut 12, further includes being arranged in inlet tube
The feed liquor sealing element 13 of 11 endface of connector, the feed liquor sealing element 13 is to guarantee the utility model specific embodiment in feed liquor
Sealing performance at end.It further include the return-air interface 6 that 1 top of liquid feeding end component is set, liquid hydrogen enters cold end by liquid feeding end
Afterwards, wherein the Gaseous Hydrogen being mingled with is flowed out by return-air interface, to guarantee the purity of liquid hydrogen.It further include being arranged in 4 inner cavity of liquid storage chamber
The flowing hole 41 to be connected to liquid storage chamber 4 and one stage of compression cavity 321 on wall, liquid hydrogen enter after liquid storage chamber 4 by logical
The flowing hole 41 for crossing lumen circumference arrangement enters one stage of compression cavity 321.
It further include the seal assembly for being arranged in compression chamber cavity 32 and being arranged around piston rod 31.The seal assembly packet
First seal assembly 331 of pressure produced by including to seal one stage of compression and to seal pressure caused by two-stage compression
Second seal assembly 332.It further include being set on the piston rod 31 to reinforce 31 operation stability of piston rod and can support
The pump housing flange 7 of first seal assembly 331 is connected to a fixed between the pump housing flange 7 and the cold end pump housing 5 with fixing bolt 71
And the leakproofness of its connection is kept with pump housing sealing element 72.
It further include the reducer unit 42 that is arranged in one stage of compression cavity 321 and can be connected to liquid storage chamber 4, when one stage of compression is super
When crossing setting pressure, pressure reducing valve is opened, and liquid stays back liquid storage chamber, pressure release.
It further include being arranged at the first seal assembly 331 to the overflow ducts for being connected to liquid storage chamber 4, the overflow ducts are used
To guide a small amount of hydrogen liquid stream at the first seal assembly 331 to return in liquid storage chamber 4.
It does not refer to place above, is suitable for the prior art.
Specific embodiment of the utility model is described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present utility model can conceive and makes many modifications and variations.Therefore, all the art
Technical staff's the utility model design is available by logical analysis, reasoning, or a limited experiment in the prior art
Technical solution, all should be in protection scope determined by the claims.
Claims (10)
1. a kind of high pressure low temperature reciprocating pump cold end, it is characterised in that: including liquid feeding end component (1), outlet end component (2), compression
Chamber component (3), liquid storage chamber (4) and the cold end pump housing (5) for accommodating compression chamber component (3) and liquid storage chamber (4), the compression chamber group
Part (3) includes piston rod (31) and compression chamber cavity (32), and the compression chamber cavity (32) is provided with one stage of compression cavity (321)
With two-stage compression cavity (322), liquid enters liquid storage chamber (4) by the liquid feeding end component (1), then in piston rod (31)
Promotion make it is lower enter one stage of compression cavity (321), second level is entered by level-one liquid valve in the case where the pulling of piston rod (31) is made
Compression chamber (322), piston rod (31) push away effect under two-stage compression cavity (322) liquid by outlet end component (2)
Outflow.
2. a kind of high pressure low temperature reciprocating pump cold end according to claim 1, it is characterised in that: the liquid feeding end component (1)
It further include feed liquor of the setting in feed liquor pipe fitting (11) endface including feed liquor pipe fitting (11) and inlet tube collar nut (12)
Sealing element (13).
3. a kind of high pressure low temperature reciprocating pump cold end according to claim 1, it is characterised in that: further include being arranged in liquid storage chamber
(4) flowing hole (41) to be connected to liquid storage chamber (4) and one stage of compression cavity (321) on the wall of inner cavity.
4. a kind of high pressure low temperature reciprocating pump cold end according to claim 1, it is characterised in that: further include being arranged in liquid feeding end
Return-air interface (6) above component (1).
5. a kind of high pressure low temperature reciprocating pump cold end according to claim 1, it is characterised in that: further include being arranged in compression chamber
In cavity (32) and around the seal assembly of piston rod (31) setting.
6. a kind of high pressure low temperature reciprocating pump cold end according to claim 5, it is characterised in that: the seal assembly includes using
To seal the first seal assembly (331) and to seal pressure caused by two-stage compression of pressure produced by one stage of compression
Two seal assemblies (332).
7. a kind of high pressure low temperature reciprocating pump cold end according to claim 1, it is characterised in that: further include being set in the work
To reinforce the pump housing flange (7) of piston rod (31) operation stability and sustainable first seal assembly (331) on stopper rod (31).
8. a kind of high pressure low temperature reciprocating pump cold end according to claim 7, it is characterised in that: the pump housing flange (7) with
The leakproofness for being connected to a fixed between the cold end pump housing (5) with fixing bolt (71) and keeping it to connect with pump housing sealing element (72).
9. a kind of high pressure low temperature reciprocating pump cold end according to claim 1, it is characterised in that: further include being arranged in level-one pressure
Contracting cavity (321) is interior and can be connected to the reducer unit (42) of liquid storage chamber (4).
10. a kind of high pressure low temperature reciprocating pump cold end according to claim 1, it is characterised in that: further include being arranged first
To be connected to the overflow ducts of liquid storage chamber (4) at seal assembly (331).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821698666.9U CN209228602U (en) | 2018-10-19 | 2018-10-19 | A kind of high pressure low temperature reciprocating pump cold end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821698666.9U CN209228602U (en) | 2018-10-19 | 2018-10-19 | A kind of high pressure low temperature reciprocating pump cold end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209228602U true CN209228602U (en) | 2019-08-09 |
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ID=67500356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821698666.9U Active CN209228602U (en) | 2018-10-19 | 2018-10-19 | A kind of high pressure low temperature reciprocating pump cold end |
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| CN (1) | CN209228602U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404273A (en) * | 2018-10-19 | 2019-03-01 | 湖州三井低温设备有限公司 | A kind of high pressure low temperature reciprocating pump cold end |
-
2018
- 2018-10-19 CN CN201821698666.9U patent/CN209228602U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404273A (en) * | 2018-10-19 | 2019-03-01 | 湖州三井低温设备有限公司 | A kind of high pressure low temperature reciprocating pump cold end |
| CN109404273B (en) * | 2018-10-19 | 2024-02-09 | 湖州三井低温设备有限公司 | Cold end of high-pressure low-temperature reciprocating pump |
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