CN101892969A - High pressure low temperature liquid nitrogen pump hydraulic terminal - Google Patents
High pressure low temperature liquid nitrogen pump hydraulic terminal Download PDFInfo
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- CN101892969A CN101892969A CN2010102549918A CN201010254991A CN101892969A CN 101892969 A CN101892969 A CN 101892969A CN 2010102549918 A CN2010102549918 A CN 2010102549918A CN 201010254991 A CN201010254991 A CN 201010254991A CN 101892969 A CN101892969 A CN 101892969A
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Abstract
The invention discloses a high pressure low temperature liquid nitrogen pump hydraulic terminal, belonging to the oil field liquid nitrogen conveyer device field. The high pressure low temperature pump hydraulic terminal of the invention comprises a plunger piston and a cylinder body; wherein the plunger piston and the cylinder body are sheathed and connected, the cylinder body is provided with an entire valve, a spacer bush is arranged between the cylinder body and the plunger piston, the spacer bush and the entire valve are connected, the outer surface of the spacer bush is provided with a first groove, the end face of the spacer bush far away from the entire valve is opened with a second groove which communicates the first groove and the interior of the spacer bush, the side wall of the cylinder body is provided with a precooling liquid inlet and a precooling liquid outlet, and the precooling liquid inlet and the precooling liquid outlet are respectively communicated with the first groove. The high pressure low temperature liquid nitrogen hydraulic terminal of the invention has simple structure, less quick-wear part and high reliability and is applicable to being popularized in the liquid nitrogen conveying field.
Description
Technical field
The present invention relates to a kind of oil field liquid nitrogen feedway, especially a kind of oil field liquid nitrogen pump.
Background technique
Liquid nitrogen pump is the core component of liquid nitrogen pump vehicle, and its effect is the high pressure pumping that realizes liquid nitrogen or liquid carbon dioxide, can be used for the job that requires special skills of multiple exploration and developments such as nitrogen gaslift, nitrogen replacement, nitrogen pressure break, mixed gas acidifying.Because liquid nitrogen pump vehicle belongs to job that requires special skills equipment, the medium of its conveying has characteristics such as high pressure and low temperature, and the medium of low temperature can be vaporized at normal temperatures, becomes gas from liquid, so just need carry out precooling treatment to the device of carrying before the transporting low temperature medium.At present, the technology that liquid nitrogen injects excessively, how safety, to inject liquid nitrogen effectively be key problem.Owing to be subjected to the physical property of liquid nitrogen and the influence of liquid nitrogen special process, the injection device of traditional sucrose, the water injection pump of using as oil-field flooding, the fracturing pump that conventional pressure break is used, all can't carry out precooling to pump chamber, can not meet the demands, so triplex pump that uses on the oil field such as water injection pump, fracturing pump are not suitable for the conveying of cryogenic liquide.In addition, the feed liquor valve group of the employing of existing automotive reciprocating pump and liquid discharging valve group, its structure are complicated, and easily damaged parts is many, and reliability is lower.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of simple in structure, be convenient to safeguard, can carry out precooling treatment to the pump chamber of liquid nitrogen pump, be fit to carry the high pressure low temperature liquid nitrogen pump hydraulic terminal of liquid nitrogen.
What the present invention adopted is that technological scheme is as follows:
High pressure low temperature liquid nitrogen pump hydraulic terminal of the present invention, comprise plunger and cylinder body, described plunger is connected with the cylinder body suit, described cylinder body is provided with integral valve, be provided with spacer between described cylinder body and the plunger, described spacer links to each other with integral valve, the appearance of described spacer is provided with first groove, offer second groove that is communicated with first groove and spacer inside on the end face away from integral valve of described spacer, described cylinder side wall is provided with precooling liquid entering hole and precooling liquid port, and described precooling liquid entering hole and precooling liquid port are communicated with first groove respectively.
Owing to adopted said structure, cylinder body is provided with integral valve, is used to control the feed liquor of liquid nitrogen conveying and the control of fluid.Between plunger and cylinder body, add spacer, the outer surface of spacer offers first groove, offer second groove on the end face away from integral valve of spacer, second groove is communicated with first groove and spacer inside, and the cylinder body of the first groove correspondence is provided with precooling liquid entering hole and precooling liquid port.Before using liquid nitrogen pump, need carry out precooling treatment to the pump chamber of liquid nitrogen pump, liquid nitrogen in the holding vessel is input in first groove by the precooling liquid entering hole, enter in the space of plunger head back of spacer inside from second groove again, make liquid nitrogen surround whole pump chamber, absorb the extraneous heat that imports in the pumping cylinder, pump chamber to liquid nitrogen pump carries out precooling, enter into the precooling liquid nitrogen in the spacer, discharge from the precooling liquid port from the gap of second groove around cylinder body, flow in the holding vessel at last.By aforesaid operations, can carry out precooling to the pump chamber of liquid nitrogen pump, thereby when having avoided liquid nitrogen pump to carry liquid nitrogen, liquid nitrogen runs into the pump housing of normal temperature and vaporizes.On spacer, be connected with integral valve, when making the work of whole liquid nitrogen pump, promptly during the plunger back and forth movement, can play conveying function liquid nitrogen.
High pressure low temperature liquid nitrogen pump hydraulic terminal of the present invention, described integral valve is arranged at cylinder interior, and described integral valve comprises the valve body that is connected with spacer, is arranged at suction valve and expulsion valve in the valve body, is connected on the valve body by spring between described suction valve and the expulsion valve.
Owing to adopted said structure, integral valve is arranged at the inside of cylinder body, the valve body of integral valve is a hollow structure, suction valve and expulsion valve all are arranged in the valve body, be connected by spring between suction valve and the expulsion valve, i.e. mounting spring on expulsion valve, one end of spring is connected on the suction valve, the other end of spring is connected on the spring seat that is arranged on the expulsion valve, spring seat is limited on the expulsion valve by pin, all the time there is tension force between expulsion valve and suction valve and the valve body, make expulsion valve and suction valve have the trend of tending to close, when plunger during to left movement owing to be vacuum in the pump chamber, under the effect of pressure, make suction valve to left movement, expulsion valve closes, at this moment liquid nitrogen can enter in the valve body cavity on every side from suction port, inlet opening from the valve body enters in the pump chamber again, plunger moves right again, when the pressure in the pump chamber reaches certain value, expulsion valve promptly is opened, and suction valve closes, and liquid nitrogen is under the effect of pressure, discharge by expulsion valve, thereby reach the purpose that liquid nitrogen is carried.
High pressure low temperature liquid nitrogen pump hydraulic terminal of the present invention is fitted with outlet(discharge) flange on the described valve body, and the gland of the outer suit of described outlet(discharge) flange is fixedlyed connected with cylinder body.
Owing to adopted said structure, be fitted with outlet(discharge) flange on the valve body, outlet(discharge) flange is glanded and is limited in the cylinder body, can connect corresponding flange on the outlet(discharge) flange, is convenient to being connected of discharge conduit and liquid nitrogen pump.Liquid nitrogen from expulsion valve is discharged is discharged in the pipeline by outlet(discharge) flange.
High pressure low temperature liquid nitrogen pump hydraulic terminal of the present invention, described plunger and suction valve, expulsion valve are arranged on the same axis.
Owing to adopted said structure, plunger and suction valve, expulsion valve are arranged on the same axis, make the designs simplification of the whole pump housing, the production of cylinder body is more succinct, it is more convenient to process, and the dismounting maintenance is more convenient, and assembly technology is stable, make full use of the actual volume of active chamber, reduced clearance volume.
In sum, owing to adopted technique scheme, the invention has the beneficial effects as follows:
1. high pressure low temperature liquid nitrogen pump hydraulic terminal of the present invention, expulsion valve and suction valve are with overall structure, simple in structure, easy to process, maintenance facility;
2. high pressure low temperature liquid nitrogen pump hydraulic terminal of the present invention can carry out precooling treatment to the pump chamber of liquid nitrogen pump, is fit to carry the liquid nitrogen of high pressure low temperature;
3. high pressure low temperature liquid nitrogen pump hydraulic terminal of the present invention, few easy workout part, reliability height have made full use of the actual volume of active chamber, have reduced clearance volume, are adapted at the liquid nitrogen transportation art and promote.
Description of drawings
Below in conjunction with the invention will be further described as figure, wherein:
Fig. 1 is the structural representation of high pressure low temperature liquid nitrogen pump hydraulic terminal of the present invention;
Fig. 2 is the structural representation of the spacer of high pressure low temperature liquid nitrogen pump hydraulic terminal of the present invention;
Fig. 3 is that the A of Fig. 2 is to structural representation.
Reference character: 1-plunger, 2-screw plug, 3-high pressure sealing assembly, 4-cylinder body, 5-spacer, 6-plunger seal circle, 7-suction valve, 8-sealing gasket, 9-valve body, 10-suction port, 11-spring seat, 12-spring, 13-gland, 14-expulsion valve, 15-outlet(discharge) flange, 16-exhaust port, 17-inner seal ring, 18-exterior seal ring, 19-countersunk screw, 20-precooling liquid port, 21-pin, 22-first groove, 23-precooling liquid entering hole, 24-second groove.
Embodiment
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
As Fig. 1, Fig. 2 and Fig. 3 are described, high pressure low temperature liquid nitrogen pump hydraulic terminal of the present invention, comprise plunger 1 and cylinder body 4, described plunger 1 is set in the cylinder body 4, because plunger 1 need be connected with drive unit, so joint of plunger 1 and cylinder body 4, also be provided with high pressure sealing assembly 3, be used for the sealing to liquid nitrogen pump, high pressure sealing assembly 3 is limited in the cylinder body 4 by screw plug 2, and screw plug 2 is fixedlyed connected with cylinder body 4, be set with spacer 5 on the described plunger 1 between plunger 1 and cylinder body 4, the sealing activity cooperates between plunger 1 and the spacer 5, and therefore plunger 1 is provided with plunger seal circle 6, is used for the work pump chamber of liquid nitrogen pump is sealed.The appearance of described spacer 5 is provided with first groove 22 of two symmetries, cylinder body 4 sidewalls are provided with precooling liquid entering hole 23 and precooling liquid port 21, described precooling liquid entering hole 23 and precooling liquid port 21 all are communicated with first groove 22, when the needs precooling, the precooling liquid nitrogen enters in first groove 22 from precooling liquid entering hole 23, discharge from precooling liquid port 21 again, because spacer 5 is exactly in fact the pump chamber of liquid nitrogen pump hydraulic terminal, so the precooling liquid nitrogen passes through from first groove 22, absorb the heat of pump chamber, to the pump chamber precooling.Offer second groove 24 that is communicated with first groove 22 and spacer 5 inside on the end face away from integral valve of described spacer 5, make and enter into first groove, 22 interior precooling liquid nitrogen enter into spacer 5 by second groove 24 inside, because second groove 24 is arranged at the end of plug, make the precooling liquid nitrogen can enter in the space of plug back and spacer formation, thereby plug and spacer 5 are carried out precooling.Be connected with valve body 9 on the spacer 5, valve body 9 is a hollow structure, suction valve 7 and expulsion valve 14 are installed in the inside of valve body 9, be connected on the valve body 9 by spring 12 between described suction valve 7 and the expulsion valve 14, i.e. mounting spring 12 on expulsion valve 14, one end of spring 12 is connected on the suction valve 7, the other end of spring 12 is connected on the spring seat 11 that is arranged on the expulsion valve 14, spring seat 11 is limited on the expulsion valve 14 by pin 21, all the time there is tension force between expulsion valve 14 and suction valve 7 and the valve body 9, make expulsion valve 14 and suction valve 11 have the trend of tending to close, be fixedly connected with sealing gasket 8 on the described suction valve 11, make sealing gasket 8 to move with suction valve 11, when suction valve 11 cuts out, good seal between suction valve 11 and the valve body 9.When under the effect of plunger 1 at drive unit during to left movement, because in the pump chamber is vacuum, under the effect of pressure, make suction valve 7 to left movement, expulsion valve 14 closes, at this moment liquid nitrogen can enter in valve body 9 cavity on every side from suction port 10, inlet opening from the valve body 9 enters in the pump chamber again, under the effect of drive unit, plunger 1 moves right again, and when the pressure in the pump chamber reached certain value, expulsion valve 14 promptly was opened, suction valve 11 closes, liquid nitrogen is discharged by expulsion valve 14 under the effect of pressure, thereby reaches the purpose that liquid nitrogen is carried.Be fitted with outlet(discharge) flange 15 on the described valve body 9, seal by inner seal ring 17 between valve body 9 and the outlet(discharge) flange 15, the gland 13 of described outlet(discharge) flange 15 outer suits is fixedlyed connected with cylinder body 4, be that gland 13 is fixedlyed connected with cylinder body 4 by countersunk screw 19,19 outlet(discharge) flanges 15 are limited in the cylinder body 4, seal by exterior seal ring 19 between outlet(discharge) flange 15 and cylinder body 4 inwalls, described outlet(discharge) flange 15 is provided with exhaust port 16, exhaust port 16 is corresponding with expulsion valve 14, outlet(discharge) flange 15 can with external pipe flange be connected, the liquid nitrogen of discharging from exhaust port enters in the pipeline.High pressure low temperature liquid nitrogen pump hydraulic terminal of the present invention, wherein suction valve 7, expulsion valve 14 forms integral valve with valve body 9, has the function of expulsion valve 7 and suction valve 14 simultaneously concurrently, makes designs simplification, and component reduce.Plunger 1 is arranged on the same axis with suction valve 7, expulsion valve 14, makes whole liquid nitrogen pump structure more compact, for convenience detach and installation.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (4)
1. high pressure low temperature liquid nitrogen pump hydraulic terminal, comprise plunger (1) and cylinder body (4), described plunger (1) is connected with cylinder body (4) suit, it is characterized in that: described cylinder body (4) is provided with integral valve, be provided with spacer (5) between described cylinder body (4) and the plunger (1), described spacer (5) links to each other with integral valve, the appearance of described spacer (5) is provided with first groove (22), offer on the end face away from integral valve of described spacer (5) and be communicated with first groove (22), second groove (24) inner with spacer (5), described cylinder body (4) sidewall is provided with precooling liquid entering hole (23) and precooling liquid port (21), and described precooling liquid entering hole (23) and precooling liquid port (21) are communicated with first groove (22) respectively.
2. high pressure low temperature liquid nitrogen pump hydraulic terminal as claimed in claim 1, it is characterized in that: described integral valve is arranged at cylinder body (4) inside, described integral valve comprises the valve body (9) that is connected with spacer (5), is arranged at suction valve (7) and expulsion valve (14) in the valve body (9), is connected on the valve body (9) by spring (12) between described suction valve (7) and the expulsion valve (14).
3. high pressure low temperature liquid nitrogen pump hydraulic terminal as claimed in claim 2 is characterized in that: be fitted with outlet(discharge) flange (15) on the described valve body (9), the gland (13) of the outer suit of described outlet(discharge) flange (15) is fixedlyed connected with cylinder body (4).
4. as claim 2 or 3 described high pressure low temperature liquid nitrogen pump hydraulic terminals, it is characterized in that: described plunger (1) is arranged on the same axis with suction valve (7), expulsion valve (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102549918A CN101892969A (en) | 2010-08-17 | 2010-08-17 | High pressure low temperature liquid nitrogen pump hydraulic terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102549918A CN101892969A (en) | 2010-08-17 | 2010-08-17 | High pressure low temperature liquid nitrogen pump hydraulic terminal |
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| Publication Number | Publication Date |
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| CN101892969A true CN101892969A (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102549918A Pending CN101892969A (en) | 2010-08-17 | 2010-08-17 | High pressure low temperature liquid nitrogen pump hydraulic terminal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168329A (en) * | 2016-08-25 | 2016-11-30 | 自贡通达机器制造有限公司 | Vertical LNG filling apparatus |
| CN109404274A (en) * | 2018-10-25 | 2019-03-01 | 烟台杰瑞石油装备技术有限公司 | A kind of cold end of low-temperature high-pressure plunger pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2405553A1 (en) * | 1973-02-14 | 1974-08-29 | Josef Martin | PUMPING UNIT |
| JPS59102120A (en) * | 1982-12-03 | 1984-06-13 | Nichiwa Sangyo Kk | Non-return type constant quantity distributing valve |
| CN1757915A (en) * | 2005-11-24 | 2006-04-12 | 李蓉 | Ground dual-pressure hydraulic filling booster pump |
| CN101293396A (en) * | 2008-06-16 | 2008-10-29 | 福建祥龙塑胶有限公司 | Precooling apparatus of plastic tube product line |
| CN201265467Y (en) * | 2008-09-27 | 2009-07-01 | 厦门信源环保科技有限公司 | Dual action valve |
-
2010
- 2010-08-17 CN CN2010102549918A patent/CN101892969A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2405553A1 (en) * | 1973-02-14 | 1974-08-29 | Josef Martin | PUMPING UNIT |
| JPS59102120A (en) * | 1982-12-03 | 1984-06-13 | Nichiwa Sangyo Kk | Non-return type constant quantity distributing valve |
| CN1757915A (en) * | 2005-11-24 | 2006-04-12 | 李蓉 | Ground dual-pressure hydraulic filling booster pump |
| CN101293396A (en) * | 2008-06-16 | 2008-10-29 | 福建祥龙塑胶有限公司 | Precooling apparatus of plastic tube product line |
| CN201265467Y (en) * | 2008-09-27 | 2009-07-01 | 厦门信源环保科技有限公司 | Dual action valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168329A (en) * | 2016-08-25 | 2016-11-30 | 自贡通达机器制造有限公司 | Vertical LNG filling apparatus |
| CN109404274A (en) * | 2018-10-25 | 2019-03-01 | 烟台杰瑞石油装备技术有限公司 | A kind of cold end of low-temperature high-pressure plunger pump |
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Application publication date: 20101124 |