CN102213202A - Small-flow CO2 plunger pump - Google Patents
Small-flow CO2 plunger pump Download PDFInfo
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- CN102213202A CN102213202A CN2011101498542A CN201110149854A CN102213202A CN 102213202 A CN102213202 A CN 102213202A CN 2011101498542 A CN2011101498542 A CN 2011101498542A CN 201110149854 A CN201110149854 A CN 201110149854A CN 102213202 A CN102213202 A CN 102213202A
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- plunger
- feed liquor
- liquor valve
- pump
- hole
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Abstract
The invention relates to a small-flow CO2 plunger pump which comprises a pump shell (20) and a pump core (21), wherein the pump core (21) is inserted into the central through hole of the pump shell (20), a cavity (21.1) is formed between the out wall of the pump core (21) and the inner wall of the pump shell (20), a feed liquor valve rod hole (21.2) and a plunger hole(21.3) is arranged on the pump core (21) along the length direction of the pump core (21), a through hole (21.4) is arranged on the pump core (21) adjacent to the left side, the cavity (21.1), the feed liquor valve rod hole (21.2) and the plunger hole(21.3) are mutual connected through the through hole (21.4), a feed liquor valve rod (23) and a plunger (9) are respectively inserted into the feed liquor valve rod hole (21.2) and the plunger hole(21.3), and a plunger cooling jacket (12) is sleeved on the plunger (9) and is provided with multi-cooling holes (12.1). The small-flow CO2 plunger pump provided by the invention has the advantages of good heat dissipation effect and no need of performing vaporization and heat absorbtion through releasing CO2.
Description
Technical field
The present invention relates to a kind of CO
2Pump especially relates to a kind of small flow CO
2Plunger pump belongs to the special gas transportation art.
Background technique
The supercritical CO technology has been applied to biomedicine more and more widely, industrial production, fields such as macromolecular material, particularly macromolecular material foaming adopt supercritical CO can replace flammable explosive gas stabilizers such as the present fluorine-containing stabilizer that uses, butane, dimethyl ether as stabilizer.Fluorine-containing stabilizer will damage atmospheric ozone layer, just progressively limits its use at present; Butane, flammable explosive gas stabilizers such as dimethyl ether are to having brought greatly potential safety hazard in the production process, factory is burnt by fried and happens occasionally, and rest on as stabilizer and to make foam material not possess flame retarding in the macromolecular material.
The critical temperature of CO lower (TC=31.1 ℃) is if be higher than this temperature, then container inner pressure is high does not exist liquid CO more yet, liquid CO in container in the relation that is the temperature heel pressure, temperature high more (＜TC) then pressure is high more, the low more then pressure of temperature is low more, but hypotony then CO fluid temperature is low more, becomes dry ice the CO storage tank will be scrapped.The liquid CO temperature that supplier offers the user is about-20 ℃, is stored in the storage tank that has heat insulating function, and its saturated pressure is about 1.9MPA.The heat of then permeating into when external temperature is permeated the CO liquid heat in the storage tank uprises the CO temperature and gasifies, in the time of gasification then the storage tank internal pressure raise, the pressure after the rising is by the pressure discharge after being installed in safety valve on the storage tank and will raising.CO liquid cools off again in exhaust process, and so the CO in the storage tank gets back to (20 ℃ of normal states again.1.9MPA about).
The small flow CO pump that uses at present often is plunger pump, and one-level pump and two stage pump are arranged.The one-level plunger pump mainly contains reciprocating mechanism, plunger, plunger case, Stuffing box, import one-way valve, compositions such as outlet one-way valve.Reciprocator drives plunger opens and closed action two one-way valves do reciprocating action, thereby CO is drawn in the plunger case and extrudes.Plunger and plunger case form negative pressure when plunger shrinks back, and unidirectional outlet valve is the interior negative pressure of the pressure of liquid CO itself and plunger case and opening rapidly because pressure reduction is closed unidirectional inlet valve.CO enters in the plunger case in the mode that gasifies in the process of just having opened, and this moment, CO was heat absorption reaction, and the CO that CO gasifies under the effect of pressure when CO is full of plunger case has become liquid, is exothermic reaction at this moment, and the heat absorption heat release is balance in fact.But because the infiltration of external temperature, and the friction of plunger and filler raises the temperature of plunger and plunger case, the CO aggravation gasification that the import one-way valve is entered, temperature owing to plunger and plunger case when CO is full of plunger case is constant to the CO pressure in the heating storage tank of CO, so CO has lost threshold state, be full of is the CO of gas-liquid mixed behind the plunger case, what be full of plunger when temperature further raises will all be gas, more seriously up to gas pressure during greater than the pressure in the storage tank then the import one-way valve do not open and can not work.
At present the small flow CO one-level plunger pump that uses has adopted the insulation measure to the pump housing, and is provided with the leakage measure on Stuffing box, allows the CO gasification of leaking and plunger and plunger case are absorbed heat and cool off.
Two stage pump is on the basis of one-level, at first is injected in the high-pressure bottle by the one-level pump, makes its pressure reach about 7MPA and controls temperature, and the CO with high pressure is injected in the equipment by two stage pump again.Adopt the CO of this class formation
2Pump is at CO
2Leakage rate in the vaporization heat radiation process is difficult to control so reliability is bad.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, a kind of good heat dissipation effect is provided and need not by revealing CO
2The small flow CO that vaporizes and absorb heat
2Plunger pump.
The object of the present invention is achieved like this: a kind of small flow CO
2Plunger pump, described plunger pump includes pump case and pump core, one liquid inlet joint is installed on the described pump case, described pump core is inserted in the central through bore of pump case, and pump core two ends closely contact with the pump case two ends, form a cavity between the outer wall of described pump core and the inwall of pump case, and this cavity is connected with the inlet opening of liquid inlet joint, described pump core is provided with feed liquor valve rod hole and plunger hole along its length direction, have a through hole near left end on the described pump core, this through hole is with cavity, feed liquor valve rod hole and plunger hole are interconnected, have inlet opening near right-hand member on the described pump core, described inlet opening runs through the feed liquor valve rod hole, and an end of described inlet opening is connected with cavity, the other end is connected with plunger hole, the right-hand member of described feed liquor valve rod hole and plunger hole is respectively arranged with plug and outlet one-way valve, be plugged with feed liquor valve rod and plunger respectively in described feed liquor valve rod hole and the plunger hole, described feed liquor valve rod is positioned on the part of pump in-core and is with feed liquor valve pocket and feed liquor stem guiding cover, described feed liquor valve pocket and inlet opening opposite position place have the valve pocket hole, have a feed liquor stem through-hole that is complementary with inlet opening and valve pocket hole on the described feed liquor valve rod, be set with a plunger coolant jacket on the described plunger, have a plurality of cooling hole on the described plunger coolant jacket, be set with plunger outside seal may and plunger inner seal liner on the described plunger, and plunger outside seal may and plunger inner seal liner lay respectively at the plunger coolant jacket left and right sides.
Small flow CO of the present invention
2Plunger pump, described feed liquor valve pocket and feed liquor stem guiding cover are an overall structure.
Small flow CO of the present invention
2Plunger pump also is set with a plunger bushing on the described plunger, described plunger bushing is positioned at plunger inner seal liner right side.
Small flow CO of the present invention
2Plunger pump, described liquid inlet joint is provided with vertically upward.
Small flow CO of the present invention
2Plunger pump, described small flow CO
2Plunger pump also includes mechanical transmission mechanism, described mechanism includes a transmission case body, there is a transmission shaft to be connected on the transmission case body, and this transmission shaft is controlled cam with the feed liquor valve in being installed on transmission case body and is linked to each other by flat key with the reciprocal cam of plunger, described feed liquor valve control cam links to each other with the reciprocal guide rod of plunger with feed liquor valve guide rod respectively with the reciprocal cam of plunger, and described feed liquor valve guide rod links to each other with plunger with the feed liquor valve rod by joint respectively with the reciprocal guide rod of plunger.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention has been full of CO liquid by the design of through hole and cooling hole in the pump case in entire work process, parts such as pump core are in the encirclement of CO liquid, utilizes CO liquid that it is cooled off, and has effectively reduced extraneous heat leak and frictional heat thereof; Simultaneously liquid inlet joint is placed the top of the pump housing, and makes it vertically upward, when the CO gas of gasification is arranged in the plunger bushing, utilize the feed liquor valve open earlier and gas than the principle of liquid light, the CO of gasification is got back in the pump case from the feed liquor valve, get back to then in the CO storage tank.Utilize double-cam device control feed liquor valve rod and plunger rod.When also not retreating after plunger rod is compressed to the end, the feed liquor valve rod is at first opened the feed liquor valve, original one-way valve is become initiatively by passive open open.
Description of drawings
Fig. 1 is small flow CO of the present invention
2The application state schematic representation of plunger pump.
Fig. 2 is small flow CO of the present invention
2The structural representation of plunger pump.
Fig. 3 is small flow CO of the present invention
2The A-A sectional view of plunger pump Fig. 2.
Fig. 4 is small flow CO of the present invention
2Plunger pump one working state schematic representation (the feed liquor valve rod is in closed condition, plunger rod is in the compression finishing stage).
Fig. 5 is small flow CO of the present invention
2Plunger pump one working state schematic representation (the feed liquor valve rod is in open mode, plunger rod is in the compression finishing stage).
Fig. 6 is small flow CO of the present invention
2Plunger pump one working state schematic representation (the feed liquor valve rod is in open mode, plunger rod is in and retreats finishing stage).
Fig. 7 is small flow CO of the present invention
2Plunger pump one working state schematic representation (the feed liquor valve rod is in closed condition, plunger rod is in and retreats finishing stage).
Wherein:
Transmission shaft 1, transmission case body 2, feed liquor valve control cam 3, the reciprocal cam 4 of plunger, support 5, feed liquor valve guide rod 6, the reciprocal guide rod 7 of plunger, joint 8, plunger 9, adjustment screw 1, plunger outside seal may 11, plunger coolant jacket 12, plunger inner seal liner 13, plunger bushing 14, outlet one-way valve 15, plug 16, liquid inlet joint 17, feed liquor valve pocket 18, feed liquor stem guiding cover 19, pump case 20, pump core 21, adjustment screw 2 22, feed liquor valve rod 23;
Cooling hole 12.1;
Valve pocket hole 18.1,
Cavity 21.1, feed liquor valve rod hole 21.2, plunger hole 21.3, through hole 21.4, inlet opening 21.5,
Feed liquor stem through-hole 23.1.
Embodiment
In the accompanying drawing, the hacures among Fig. 2 and Fig. 3 are represented liquid CO
2, complete reciprocal state of Fig. 4 ~ 7 expression after plunger pump is finished a circulation and reached state shown in Figure 7, is circulated to state shown in Figure 4, the circulation of beginning next round again.
Referring to Fig. 1 ~ 3, a kind of small flow CO that the present invention relates to
2Plunger pump, described plunger pump includes pump case 20 and pump core 21, one liquid inlet joint 17 is installed on the described pump case 20, described liquid inlet joint 17 is provided with vertically upward, described pump core 21 is inserted in the central through bore of pump case 20, and pump core 21 two ends closely contact with pump case 20 two ends, form a cavity 21.1 between the inwall of the outer wall of described pump core 21 and pump case 20, and this cavity 21.1 is connected with the inlet opening of liquid inlet joint 17, described pump core 21 is provided with feed liquor valve rod hole 21.2 and plunger hole 21.3 along its length direction, have a through hole 21.4 near left end on the described pump core 21, this through hole 21.4 is with cavity 21.1, feed liquor valve rod hole 21.2 and plunger hole 21.3 are interconnected, have inlet opening 21.5 near right-hand member on the described pump core 21, described inlet opening 21.5 runs through feed liquor valve rod hole 21.2, and an end of described inlet opening 21.5 is connected with cavity 21.1, the other end is connected with plunger hole 21.3, the right-hand member of described feed liquor valve rod hole 21.2 and plunger hole 21.3 is respectively arranged with plug 16 and outlet one-way valve 15, be plugged with feed liquor valve rod 23 and plunger 9 in described feed liquor valve rod hole 21.2 and the plunger hole 21.3 respectively, described feed liquor valve rod 23 is positioned at and is with feed liquor valve pocket 18 and feed liquor stem guiding cover 19 on the part of pump core 21, and feed liquor stem guiding cover 19 is positioned at the left side of feed liquor valve pocket 18, described feed liquor valve pocket 18 has valve pocket hole 18.1 with inlet opening 21.5 opposite position places, have a feed liquor stem through-hole 23.1 that is complementary with inlet opening 21.5 and valve pocket hole 18.1 on the described feed liquor valve rod 23, (when feed liquor valve rod 23 moves to a certain position, feed liquor stem through-hole 23.1, inlet opening 21.5 is interconnected with valve pocket hole 18.1), described feed liquor valve pocket 18 and feed liquor stem guiding cover 19 can adopt an overall structure to substitute, be set with a plunger coolant jacket 12 on the described plunger 9, have a plurality of cooling hole 12.1 on the described plunger coolant jacket 12, be set with plunger outside seal may 11 on the described plunger 9, plunger inner seal liner 13 and plunger bushing 14, and plunger outside seal may 11 and plunger inner seal liner 13 lay respectively at plunger coolant jacket 12 left and right sides, and described plunger bushing 14 is positioned at plunger inner seal liner 13 right sides.
Referring to Fig. 1, during use, with liquid inlet joint 17 and liquid CO
2The source links to each other, liquid CO
2Enter in the cavity 21.1, with small flow CO of the present invention
2Plunger pump links to each other with a mechanical transmission mechanism, this mechanical transmission mechanism adopts cam to carry out transmission, its structure includes a transmission case body 2, there is a transmission shaft 1 to be connected on the transmission case body 2, described transmission shaft 1 links to each other with power sources such as motors, and the reciprocal cam of this transmission shaft 1 and feed liquor valve control cam 3 and plunger in being installed on transmission case body 24 links to each other by flat key, described feed liquor valve control cam 3 links to each other with the reciprocal guide rod 7 of feed liquor valve guide rod 6 and plunger respectively with the reciprocal cam 4 of plunger, described feed liquor valve guide rod 6 links to each other with plunger 9 with feed liquor valve rod 23 by joint 8 respectively with the reciprocal guide rod 7 of plunger, described feed liquor valve rod 23 and plunger 9 are positioned to be respectively installed with on the pump core 21 outer parts to be adjusted screw 2 22 and adjusts screw 1, and above-mentioned mechanical transmission mechanism and plunger pump of the present invention all are arranged on the support 5.In actual use, can utilize other driving mechanisms to substitute above-mentioned mechanical transmission mechanism, even the mode that can adopt PLC to add motor realizes, only need make plunger pump of the present invention can realize following working principle.
The working principle of 4 ~ 7 pairs of plunger pumps of the present invention of following structural drawing describes:
The working procedure of plunger pump of the present invention is a cyclic process, and its each single cycle can be divided into four steps, and is as follows respectively:
Step 1: referring to Fig. 4, this moment, feed liquor valve rod 23 and plunger 9 all were in low order end, and the feed liquor stem through-hole 23.1 on the feed liquor valve rod 23 is not communicated with inlet opening 21.5 and valve pocket hole 18.1 at this moment, be in closed condition, and plunger 9 also is in the compression finishing stage;
Step 2: referring to Fig. 5, utilize the driving mechanism of driving mechanism shown in Fig. 1 or other arbitrary forms, the feed liquor stem through-hole 23.1 that drive feed liquor valve rod 23 is moved to the left on the feed liquor valve rod 23 is connected with inlet opening 21.5 and valve pocket hole 18.1, and keeps plunger 9 motionless;
Gone to the initial state of step 1 subsequently by step 4, enter in the process of step 1 in step 4, feed liquor valve rod 23 keeps motionless, and plunger 9 need move right, thereby makes liquid CO
2Discharge by outlet one-way valve 15.
To the cyclic process of step 4, liquid CO is arranged all the time in step 1
2Contact with plunger 9 by through hole 21.4 and cooling hole 12.1, plunger 9 is dispelled the heat, and CO
2The gaseous state CO that in endothermic process, produces owing to vaporization
2Can in time enter liquid CO by liquid inlet joint 17
2In the container in source.
Claims (9)
1. small flow CO
2Plunger pump, described plunger pump includes pump case (20) and pump core (21), one liquid inlet joint (17) is installed on the described pump case (20), described pump core (21) is inserted in the central through bore of pump case (20), and pump core (21) two ends closely contact with pump case (20) two ends, it is characterized in that: form a cavity (21.1) between the inwall of the outer wall of described pump core (21) and pump case (20), and this cavity (21.1) is connected with the inlet opening of liquid inlet joint (17), described pump core (21) is provided with feed liquor valve rod hole (21.2) and plunger hole (21.3) along its length direction, described pump core (21) is gone up near left end and is had a through hole (21.4), this through hole (21.4) is with cavity (21.1), feed liquor valve rod hole (21.2) and plunger hole (21.3) are interconnected, described pump core (21) is gone up near right-hand member and is had inlet opening (21.5), described inlet opening (21.5) runs through feed liquor valve rod hole (21.2), and an end of described inlet opening (21.5) is connected with cavity (21.1), the other end is connected with plunger hole (21.3), the right-hand member of described feed liquor valve rod hole (21.2) and plunger hole (21.3) is respectively arranged with plug (16) and outlet one-way valve (15), be plugged with feed liquor valve rod (23) and plunger (9) in described feed liquor valve rod hole (21.2) and the plunger hole (21.3) respectively, described feed liquor valve rod (23) is positioned on the part of pump core (21) and is with feed liquor valve pocket (18) and feed liquor stem guiding cover (19), described feed liquor valve pocket (18) has valve pocket hole (18.1) with inlet opening (21.5) opposite position place, have a feed liquor stem through-hole (23.1) that is complementary with inlet opening (21.5) and valve pocket hole (18.1) on the described feed liquor valve rod (23), be set with a plunger coolant jacket (12) on the described plunger (9), have a plurality of cooling hole (12.1) on the described plunger coolant jacket (12), be set with plunger outside seal may (11) and plunger inner seal liner (13) on the described plunger (9), and plunger outside seal may (11) and plunger inner seal liner (13) lay respectively at plunger coolant jacket (12) left and right sides.
2. a kind of according to claim 1 small flow CO
2Plunger pump is characterized in that: described feed liquor valve pocket (18) and feed liquor stem guiding cover (19) are an overall structure.
3. a kind of as claimed in claim 1 or 2 small flow CO
2Plunger pump is characterized in that: also be set with a plunger bushing (14) on the described plunger (9), described plunger bushing (14) is positioned at plunger inner seal liner (13) right side.
4. a kind of as claimed in claim 1 or 2 small flow CO
2Plunger pump is characterized in that: described liquid inlet joint (17) is provided with vertically upward.
5. as a kind of small flow CO as described in the claim 3
2Plunger pump is characterized in that: described liquid inlet joint (17) is provided with vertically upward.
6. a kind of as claimed in claim 1 or 2 small flow CO
2Plunger pump is characterized in that: described small flow CO
2Plunger pump also includes mechanical transmission mechanism, described mechanism includes a transmission case body (2), there is a transmission shaft (1) to be connected on the transmission case body (2), and this transmission shaft (1) is controlled cam (3) with the feed liquor valve in being installed on transmission case body (2) and is linked to each other by flat key with the reciprocal cam of plunger (4), described feed liquor valve control cam (3) links to each other with the reciprocal guide rod of plunger (7) with feed liquor valve guide rod (6) respectively with the reciprocal cam of plunger (4), and described feed liquor valve guide rod (6) links to each other with plunger (9) with feed liquor valve rod (23) by joint (8) respectively with the reciprocal guide rod of plunger (7).
7. as a kind of small flow CO as described in the claim 3
2Plunger pump is characterized in that: described small flow CO
2Plunger pump also includes mechanical transmission mechanism, described mechanism includes a transmission case body (2), there is a transmission shaft (1) to be connected on the transmission case body (2), and this transmission shaft (1) is controlled cam (3) with the feed liquor valve in being installed on transmission case body (2) and is linked to each other by flat key with the reciprocal cam of plunger (4), described feed liquor valve control cam (3) links to each other with the reciprocal guide rod of plunger (7) with feed liquor valve guide rod (6) respectively with the reciprocal cam of plunger (4), and described feed liquor valve guide rod (6) links to each other with plunger (9) with feed liquor valve rod (23) by joint (8) respectively with the reciprocal guide rod of plunger (7).
8. as a kind of small flow CO as described in the claim 4
2Plunger pump is characterized in that: described small flow CO
2Plunger pump also includes mechanical transmission mechanism, described mechanism includes a transmission case body (2), there is a transmission shaft (1) to be connected on the transmission case body (2), and this transmission shaft (1) is controlled cam (3) with the feed liquor valve in being installed on transmission case body (2) and is linked to each other by flat key with the reciprocal cam of plunger (4), described feed liquor valve control cam (3) links to each other with the reciprocal guide rod of plunger (7) with feed liquor valve guide rod (6) respectively with the reciprocal cam of plunger (4), and described feed liquor valve guide rod (6) links to each other with plunger (9) with feed liquor valve rod (23) by joint (8) respectively with the reciprocal guide rod of plunger (7).
9. as a kind of small flow CO as described in the claim 5
2Plunger pump is characterized in that: described small flow CO
2Plunger pump also includes mechanical transmission mechanism, described mechanism includes a transmission case body (2), there is a transmission shaft (1) to be connected on the transmission case body (2), and this transmission shaft (1) is controlled cam (3) with the feed liquor valve in being installed on transmission case body (2) and is linked to each other by flat key with the reciprocal cam of plunger (4), described feed liquor valve control cam (3) links to each other with the reciprocal guide rod of plunger (7) with feed liquor valve guide rod (6) respectively with the reciprocal cam of plunger (4), and described feed liquor valve guide rod (6) links to each other with plunger (9) with feed liquor valve rod (23) by joint (8) respectively with the reciprocal guide rod of plunger (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110149854.2A CN102213202B (en) | 2011-06-07 | 2011-06-07 | Small flow CO 2plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110149854.2A CN102213202B (en) | 2011-06-07 | 2011-06-07 | Small flow CO 2plunger pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102213202A true CN102213202A (en) | 2011-10-12 |
| CN102213202B CN102213202B (en) | 2015-08-19 |
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ID=44744666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110149854.2A Expired - Fee Related CN102213202B (en) | 2011-06-07 | 2011-06-07 | Small flow CO 2plunger pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN102213202B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1078027A (en) * | 1963-08-21 | 1967-08-02 | Distillers Co Yeast Ltd | Piston pumps for liquid carbon dioxide |
| US4396354A (en) * | 1980-10-31 | 1983-08-02 | Union Carbide Corporation | Cryogenic pump and method for pumping cryogenic liquids |
| EP0501806A1 (en) * | 1991-03-01 | 1992-09-02 | Suprex Corporation | Liquefied carbon dioxide pump |
| EP0841481A2 (en) * | 1996-11-12 | 1998-05-13 | Linde Aktiengesellschaft | Compressing carbon dioxide or nitrogen oxide |
| WO2003098046A1 (en) * | 2002-05-15 | 2003-11-27 | Ontogen Corporation | Pump system for pumping liquefied gases |
| CN201836102U (en) * | 2010-10-13 | 2011-05-18 | 磨锐泵（上海）有限公司 | Seal structure of liquid carbon dioxide delivery pump and liquid carbon dioxide delivery pump |
| CN202125413U (en) * | 2011-06-07 | 2012-01-25 | 赵祖良 | Small-flow carbon dioxide (CO2) plunger pump |
-
2011
- 2011-06-07 CN CN201110149854.2A patent/CN102213202B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1078027A (en) * | 1963-08-21 | 1967-08-02 | Distillers Co Yeast Ltd | Piston pumps for liquid carbon dioxide |
| US4396354A (en) * | 1980-10-31 | 1983-08-02 | Union Carbide Corporation | Cryogenic pump and method for pumping cryogenic liquids |
| EP0501806A1 (en) * | 1991-03-01 | 1992-09-02 | Suprex Corporation | Liquefied carbon dioxide pump |
| EP0841481A2 (en) * | 1996-11-12 | 1998-05-13 | Linde Aktiengesellschaft | Compressing carbon dioxide or nitrogen oxide |
| WO2003098046A1 (en) * | 2002-05-15 | 2003-11-27 | Ontogen Corporation | Pump system for pumping liquefied gases |
| CN201836102U (en) * | 2010-10-13 | 2011-05-18 | 磨锐泵（上海）有限公司 | Seal structure of liquid carbon dioxide delivery pump and liquid carbon dioxide delivery pump |
| CN202125413U (en) * | 2011-06-07 | 2012-01-25 | 赵祖良 | Small-flow carbon dioxide (CO2) plunger pump |
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| Publication number | Publication date |
|---|---|
| CN102213202B (en) | 2015-08-19 |
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Granted publication date: 20150819 Termination date: 20160607 |