CN206158938U - Two -way ram pump suitable for low temperature medium - Google Patents
Two -way ram pump suitable for low temperature medium Download PDFInfo
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- CN206158938U CN206158938U CN201621074629.1U CN201621074629U CN206158938U CN 206158938 U CN206158938 U CN 206158938U CN 201621074629 U CN201621074629 U CN 201621074629U CN 206158938 U CN206158938 U CN 206158938U
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Abstract
The utility model discloses this has designed a two -way ram pump suitable for low temperature medium, belongs to fluid transmission equipment technical field. Including pump case, set up in the total feed liquor pipeline and the setting of pump case one end are in feed liquor chamber, cylinder and piston rod in the pump case, the piston rod is in be the reciprocating motion who impels and retract in the cylinder, be provided with two at least feed liquor valves and two at least play liquid valves on the cylinder, the feed liquor valve with be provided with one way check valve on going out the liquid valve, work as it is when the ahead running is done to the piston rod, partly the feed liquor valve with go out the liquid valve and be in the circulation state, work as the piston rod is done when retracting the motion, another part the feed liquor valve with it is in the circulation state to go out the liquid valve. This piston pump feed liquor is efficient and the flow state stable, and manufacturing cost reduces under the through -flow demand to can effectively reduce the loss of pump and pipeline.
Description
Technical field
The utility model is related to conveying equipment for fluid substances technical field, more particularly to a kind of double acting suitable for cryogenic media
Piston pump.
Background technology
In cryogenic liquid（Liquid oxygen, liquid nitrogen, liquefied natural gas, liquid carbon dioxide etc.）Conveying occasion or other needs
The medium conveying of gas-liquid separation, the occasion of supercharging, need pump to drive the flowing of fluid.
At present commercially transporting low temperature medium generally adopts reciprocating pump, and for single-acting pump, that is, configure a feed liquor, and one
It is individual go out liquid, there is following defect in such pump：
1. in the case that cylinder diameter or piston rod footpath are larger, when plunger stem flange moves reciprocatingly in the cylinder, piston
The change in rear volume space can cause pump chamber inside in heavy turbulence and the state of gas-liquid mixed, cause the feed liquor efficiency of pump
Reduce；
2. pump is single-acting pump, is only done work in half period, and export pipeline fluid flow is uneven, i.e., in half
The fluid flow during cycle is almost nil；
3. when needing to improve flow, only do in improving rotating speed, increase cylinder diameter, extending stroke these three modes
Go out to select, and these modes can all aggravate the phenomenon of pump chamber internal turbulence and gas-liquid mixed, further reduce the feed liquor efficiency of pump；
4. it is being configured to single-row single-acting pump（That is only one of which cold side fluid entrance）When, can there is export pipeline arteries and veins
It is dynamic big, the big shortcoming of required power of motor；
5. for single-acting pump, in same flow, rotating speed, under travel conditions, the certainty of cylinder diameter can be caused larger, while
The increase of load and the pipeline pulsation of pump is caused, increases the loss of pump and pipeline, reduce the life-span, increase equipment operating cost.
Application publication number discloses a kind of ultralow temperature reciprocating-piston for the Chinese utility model patent of the A of CN 105041634
Pump, by being provided with the little cylinder of opening the seal of piston pump is improved, and then extends its life-span, but it is without fundamentally gram
Take drawbacks described above.
Utility model content
In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a kind of double acting piston pump, can realize
In the good operation and flow and the pressure oscillation of reduction tube outlet of cryogenic pump.
For achieving the above object, the utility model devises a kind of double acting piston pump suitable for cryogenic media：Including
One pump case, the total water influent pipeline for being arranged at described pump case one end and the admission chamber, cylinder and the work that are arranged in the pump case
Stopper rod, the reciprocating motion that the piston rod is advanced in the cylinder and retracted；At least two are provided with the cylinder to enter
One-way cock is provided with liquid valve and at least two liquid valves, the liquid feed valve and the liquid valve, when the piston rod is pushed away
When entering to move, a part of liquid feed valve and the liquid valve are in circulation status, when the piston rod retracts motion, separately
A part of liquid feed valve and the liquid valve are in circulation status.
Double acting piston pump go out flow quantity and pressure oscillation diminishes, realize big flow under little cylinder diameter design, for example：
Cylinder bore diameter φ 90mm, the double-acting pump of diameter of piston rod φ 40mm, equivalent to the stream of single-acting pump cylinder bore diameter φ 123.8mm
Amount.So when, the stress of connecting rod, the bending load of line shaft is reduced and reduces 47.2% on year-on-year basis.All there is flow defeated in signal period
Go out, under the cold end combined situation of single-row and multiple row, can effectively reduce POF fluctuation.Cylinder bore diameter φ 90mm on year-on-year basis
Single-acting pump, then flow increase by 80.2%
It is cold when cylinder diameter and plunger stem flange are moved back and forth in the cylinder in the case where cylinder diameter/piston rod footpath is larger
The liquid of end inner chamber no longer produces reciprocal fluid play, the air pocket of fast moving liquid generation can not be produced again, so as to from liquid
The gassiness measuring angle of body improves the volumetric efficiency of pump.
The utility model is realized under equal flow, and the manufacturing cost of equipment decreases, and extends existing product system
Row（Power end）Flow coverage.
The liquid feed valve and the liquid valve will as far as possible meet the height of pump intake.
Used as the preferred of above-mentioned technical proposal, the quantity of the liquid feed valve is two, that is, the be arranged on the cylinder
One liquid feed valve and the second liquid feed valve；Wherein described first liquid feed valve is located on the face corresponding to the piston rod direction of propulsion；Institute
When stating piston rod and being returned at utmost, the piston rod retracts the surface in direction and still there is feed liquor with the inner surface of the cylinder
Space, second liquid feed valve is located on the cylinder surface corresponding to the feed liquor space.
Used as the preferred of above-mentioned technical proposal, the quantity of the liquid valve is two, that is, the be arranged on the cylinder
One liquid valve and the second liquid valve；When the piston rod is returned at utmost, the surface of the piston rod direction of propulsion and institute
The inner surface presence first for stating cylinder goes out liquid air gap, and first liquid valve goes out the cylinder corresponding to liquid air gap positioned at described first
On surface, and stretch out outside the pump case；When the piston rod is returned at utmost, the piston rod retracts the surface in direction still
Have second with the inner surface of the cylinder and go out liquid air gap, second liquid valve goes out corresponding to liquid air gap positioned at described second
On cylinder surface, and stretch out outside the pump case.
Used as the preferred of above-mentioned technical proposal, the piston rod is connected with motor by cutting ferrule, is arranged outside the cutting ferrule
There is support isolation part, the support isolation part is connected with the connection end of the cylinder for stretching out the pump case.
Using ferrule structure, and reserved enough piston rod free gaps, there is provided reciprocating connection.
As the preferred of above-mentioned technical proposal, it is provided with the piston rod mutually close with reservoir chamber's inwall of the cylinder
First sealing of envelope, and the second sealing mutually sealed with the connection end of the cylinder, first sealing and described
Second sealing is mutually sealed by piston ring.
As the preferred of above-mentioned technical proposal, offer leak in the middle part of second sealing, the leak with
The admission chamber is connected.
The leak makes the high-pressure medium leaked when pump high-voltage operation be decompressed to admission chamber, so as to not affect piston rod
Sealing.
As the preferred of above-mentioned technical proposal, between the pump case and the admission chamber vacuum heat-insulating layer is provided with.
As the preferred of above-mentioned technical proposal, on the surface of the pump case that the vacuum heat-insulating layer is located vacuum valve is provided with.
As the preferred of above-mentioned technical proposal, on the pump case surface that the admission chamber is located muffler is provided with.
Muffler meets cryogenic liquid precooling and the effective return-air of operation and returns to storage tank, can be placed in as needed
The top of total water influent pipeline, pump case front portion or rear portion
Used as the preferred of above-mentioned technical proposal, the piston rod is structure as a whole, and inner hollow.
This be designed to reduce piston rod deadweight, it is to avoid stress concentration, enable piston rod preferably bear tension and compression should
Power.
The utility model compared with prior art, with advantages below and beneficial effect：
（1）Double acting piston pump operational effect suitable for cryogenic media described in the utility model is good and can reduce managing
The flow of way outlet and pressure oscillation, on year-on-year basis existing single-acting cylinder increased flow；
（2）Double acting piston pump suitable for cryogenic media described in the utility model under equal flow, the system of equipment
Cause originally to decrease, and extend the flow coverage of existing product series；
（3）Double acting piston pump efficiency high tonight suitable for cryogenic media described in the utility model, and reduce pump
With the loss of pipeline；
（4）Double acting piston pump suitable for cryogenic media described in the utility model cylinder bore diameter/piston rod footpath compared with
In the case of big, when piston rod is moved back and forth in the cylinder, the liquid of inner chamber no longer produces reciprocal fluid play, no longer
The air pocket of fast moving liquid generation can be produced, so as to improve the volumetric efficiency of pump from the gassiness measuring angle of liquid.
Description of the drawings
Fig. 1 is a kind of double acting piston pump cross-sectional view suitable for cryogenic media.
In figure：Pump case 1, total water influent pipeline 2, cylinder 3, connection end 3-1, reservoir chamber 3-2, piston rod 4, the first sealing
4-1, the second sealing 4-2, leak 4-21, the first liquid feed valve 5, the second liquid feed valve 6, the first liquid valve 7, the second liquid valve 8,
Cutting ferrule 9, support isolation part 10, vacuum heat-insulating layer 11, vacuum valve 12, muffler 13.
Specific embodiment
Below in conjunction with the accompanying drawings the utility model is described in further detail with specific embodiment：
Embodiment 1：With reference to Fig. 1, a kind of double acting piston pump suitable for cryogenic media, including pump case 1, be arranged at
Total water influent pipeline 2 of the one end of the pump case 1 and the admission chamber being arranged in the pump case 1, cylinder 3 and piston rod 4, it is described
The reciprocating motion that piston rod 4 is advanced and retracted in the cylinder 3；
Vacuum heat-insulating layer 11, the pump that the vacuum heat-insulating layer 11 is located are provided between the pump case 1 and the admission chamber
Vacuum valve 12 is provided with the surface of shell 1.
Muffler 13 is provided with the surface of pump case 1 that the admission chamber is located.
Liquid feed valve and liquid valve are provided with the cylinder 3, on the liquid feed valve and the liquid valve check valve is provided with
Door, the quantity of the liquid feed valve is two, that is, the first liquid feed valve 5 and the second liquid feed valve 6 being arranged on the cylinder 3；It is described
The quantity of liquid valve is two, that is, the first liquid valve 7 and the second liquid valve 8 being arranged on the cylinder 3, and described first goes out liquid
The feed liquid that the liquid valve 8 of valve 7 and second is pumped out collects outflow.
The piston rod 4 is structure as a whole and inner hollow, is provided with the reservoir chamber 3-2 with the cylinder 3
The first sealing 4-1 that wall is mutually sealed, and the second sealing 4-2 sealed with the connection end 3-1 phases of the cylinder 3, it is described
First sealing 4-1 is mutually sealed with the second sealing 4-2 by piston ring；Open up in the middle part of the second sealing 4-2
There are leak 4-21, the leak 4-21 to be connected with the admission chamber.
The piston rod 4 is connected with motor by cutting ferrule 9, is provided with outside the cutting ferrule 9 and is supported isolation part 10, described
Support isolation part 10 is connected with the connection end 3-1 of the cylinder 3 for stretching out the pump case 1.
First liquid feed valve 5 and the second liquid valve 8 open when piston rod 4 is moved rearwards by (now, the first liquid valve 7,
Second liquid feed valve 6 closes), the feed liquor for completing first group and second group go out liquid；When piston rod 4 is moved forward, first
Liquid valve 7, the second liquid feed valve 6 opens (now the first liquid feed valve 5 and the second liquid valve 8 are closed), complete first group go out liquid and
Second group of feed liquor, so moves in circles, after the first liquid valve 7 and the second liquid valve 8 collect, flow in a cycle all
Have.Simultaneously total water influent pipeline 2 shows as continuation feed liquor, admission chamber inside unconfined flow on pipeline.
The highly pressurised liquid of micro-leakage leaks into admission chamber by leak 4-21, and now the second sealing 4-2 is sealed
Pressure be the inlet hydraulic of cold end rather than the operating pressure of cold end, therefore the sealing life of the second sealing 4-2 can be extended.
Vacuum heat-insulating layer 11 by vacuum valve 12 extract mezzanine space formed, it is therefore an objective to isolate cryogenic liquid directly with outside
Carrying out heat exchange causes cryogenic liquid seriously to gasify, and prevents from causing liquid air content to increase so that cold end suction liquid is few, makes
Into serious vibrations, noise, electric current increases sharply even cannot work.
Isolation part 10 is supported for connection cold end and the connector of power end, it is therefore an objective to isolate the cold that cold end is transmitted through coming, card
Set 9 connects piston rod 4 and power end, and when acting is moved back and forth corresponding power is provided.
Embodiment 2：With reference to Fig. 1, it is with the difference of embodiment 1, the number of the liquid feed valve is not limited solely to two
Individual, correspondingly, the number of the liquid valve is also incessantly two.
Claims (10)
1. a kind of double acting piston pump suitable for cryogenic media, it is characterised in that：Including a pump case（1）, be arranged at it is described
Pump case（1）Total water influent pipeline of one end（2）And it is arranged on the pump case（1）Interior admission chamber, cylinder（3）And piston rod
（4）, the piston rod（4）In the cylinder（3）The reciprocating motion for inside advancing and retracting；The cylinder（3）On be provided with to
Few two liquid feed valves and at least two liquid valves, are provided with one-way cock, when the work on the liquid feed valve and the liquid valve
Stopper rod（4）When doing ahead running, a part of liquid feed valve and the liquid valve are in circulation status, when the piston rod（4）
When retracting motion, liquid feed valve described in another part and the liquid valve are in circulation status.
2. a kind of double acting piston pump suitable for cryogenic media according to claim 1, it is characterised in that：The liquid feed valve
Quantity be two, that is, be arranged on the cylinder（3）On the first liquid feed valve（5）With the second liquid feed valve（6）；Wherein described first
Liquid feed valve（5）Positioned at the piston rod（4）On face corresponding to direction of propulsion；The piston rod（4）When being returned at utmost,
The piston rod（4）Retract the surface in direction still with the cylinder（3）Inner surface there is feed liquor space, second liquid feed valve
（6）Positioned at the cylinder corresponding to the feed liquor space（3）On surface.
3. a kind of double acting piston pump suitable for cryogenic media according to claim 1 or claim 2, it is characterised in that：It is described go out
The quantity of liquid valve is two, that is, be arranged on the cylinder（3）On the first liquid valve（7）With the second liquid valve（8）；The piston
Bar（4）When being returned at utmost, the piston rod（4）The surface of direction of propulsion and the cylinder（3）Inner surface have the
One goes out liquid air gap, first liquid valve（7）Go out the cylinder corresponding to liquid air gap positioned at described first（3）On surface, and stretch out
The pump case（1）Outward；The piston rod（4）When being returned at utmost, the piston rod（4）Retract the surface in direction still with institute
State cylinder（3）Inner surface exist and second go out liquid air gap, second liquid valve（8）Go out corresponding to liquid air gap positioned at described second
Cylinder（3）On surface, and stretch out the pump case（1）Outward.
4. a kind of double acting piston pump suitable for cryogenic media according to claim 1, it is characterised in that：The piston rod
（4）Pass through cutting ferrule with motor（9）It is connected, the cutting ferrule（9）Support isolation part is provided with outward（10）, the support isolation part
（10）With stretch out the pump case（1）Cylinder（3）Connection end（3-1）It is connected.
5. a kind of double acting piston pump suitable for cryogenic media according to claim 4, it is characterised in that：The piston rod
（4）On be provided with and the cylinder（3）Reservoir chamber（3-2）The first sealing that inwall is mutually sealed（4-1）, and with it is described
Cylinder（3）Connection end（3-1）The second sealing for mutually sealing（4-2）, first sealing（4-1）With the described second sealing
Portion（4-2）Mutually sealed by piston ring.
6. a kind of double acting piston pump suitable for cryogenic media according to claim 5, it is characterised in that：Described second is close
Envelope portion（4-2）Middle part offer leak（4-21）, the leak（4-21）It is connected with the admission chamber.
7. a kind of double acting piston pump suitable for cryogenic media according to claim 1, it is characterised in that：The pump case
（1）Vacuum heat-insulating layer is provided with and the admission chamber between（11）.
8. a kind of double acting piston pump suitable for cryogenic media according to claim 7, it is characterised in that：The vacuum is exhausted
Thermosphere（11）The pump case at place（1）Surface on be provided with vacuum valve（12）.
9. a kind of double acting piston pump suitable for cryogenic media according to claim 1, it is characterised in that：The admission chamber
The pump case at place（1）Muffler is provided with surface（13）.
10. a kind of double acting piston pump suitable for cryogenic media, its feature according to any bar in claim 1,2,4-9
It is：The piston rod（4）It is structure as a whole, and inner hollow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621074629.1U CN206158938U (en) | 2016-09-23 | 2016-09-23 | Two -way ram pump suitable for low temperature medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621074629.1U CN206158938U (en) | 2016-09-23 | 2016-09-23 | Two -way ram pump suitable for low temperature medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206158938U true CN206158938U (en) | 2017-05-10 |
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ID=58650651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621074629.1U Active CN206158938U (en) | 2016-09-23 | 2016-09-23 | Two -way ram pump suitable for low temperature medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206158938U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194631A (en) * | 2016-09-23 | 2016-12-07 | 湖州三井低温设备有限公司 | A kind of double acting piston pump being applicable to cryogenic media |
| CN108050044A (en) * | 2017-12-18 | 2018-05-18 | 湖州百汇低温设备有限公司 | A kind of ethylene low temperature reciprocating pump |
-
2016
- 2016-09-23 CN CN201621074629.1U patent/CN206158938U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194631A (en) * | 2016-09-23 | 2016-12-07 | 湖州三井低温设备有限公司 | A kind of double acting piston pump being applicable to cryogenic media |
| CN108050044A (en) * | 2017-12-18 | 2018-05-18 | 湖州百汇低温设备有限公司 | A kind of ethylene low temperature reciprocating pump |
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