CN107387387B - Low-pressure variable-volume flow adjusting method and adjusting mechanism for flow-adjusting injection pump - Google Patents
Low-pressure variable-volume flow adjusting method and adjusting mechanism for flow-adjusting injection pump Download PDFInfo
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- CN107387387B CN107387387B CN201710765173.6A CN201710765173A CN107387387B CN 107387387 B CN107387387 B CN 107387387B CN 201710765173 A CN201710765173 A CN 201710765173A CN 107387387 B CN107387387 B CN 107387387B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000007246 mechanism Effects 0.000 title claims abstract description 19
- 238000002347 injection Methods 0.000 title claims abstract description 18
- 239000007924 injection Substances 0.000 title claims abstract description 18
- 208000006011 Stroke Diseases 0.000 claims abstract description 74
- 230000001105 regulatory effect Effects 0.000 claims abstract description 63
- 238000007789 sealing Methods 0.000 claims description 22
- 238000006073 displacement reaction Methods 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 9
- 238000001802 infusion Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 claims 1
- 230000000717 retained effect Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 7
- 239000003921 oil Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
- F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention relates to a low-pressure variable-volume flow adjusting method for a flow-adjusting injection pump and an adjusting mechanism thereof, in particular to a flow adjusting mechanism capable of enabling a reciprocating pump to change the effective stroke length, and belongs to the technical field of oil field equipment. The method comprises the following specific steps: 1. in the discharge stroke of the pump, the pump cavity is communicated with the variable-volume cavity through the variable-volume channel, and the plunger starts to push a medium from a rear starting point to enter the variable-volume cavity with lower pressure from the variable-volume channel and is absorbed by an energy accumulator arranged in the variable-volume cavity; 2. when the invalid stroke is finished, the regulating valve is closed, the variable-volume channel is cut off from the variable-volume cavity, and the plunger pushes the medium to be discharged into a discharge pipeline of the pump; 3. the pump enters a suction stroke, the pump cavity is communicated with the variable volume cavity through the variable volume channel, and all media discharged into the variable volume cavity at an invalid stroke stage return to the variable volume channel. The invention ensures that the sheared medium is always retained in the variable-volume cavity for circulation, and ensures that the conveyed medium cannot be sheared by the adjusting mechanism.
Description
Technical Field
The invention relates to a low-pressure variable-volume flow adjusting method for a flow-adjusting injection pump and an adjusting mechanism thereof, in particular to a flow adjusting mechanism capable of enabling a reciprocating pump to change the effective stroke length, and belongs to the technical field of oil field equipment.
Background
With the oil field entering high water content later-period exploitation, tertiary oil recovery technology represented by ternary injection and polymer injection oil displacement becomes an important technical means for improving the crude oil recovery rate and continuously prolonging the stable production period of the oil field. Accordingly, a ternary injection pump and a polymer injection pump are generated, and the processes are divided into a single-pump single-well process, a multi-pump process and a one-pump three-well process according to the number of wells injected by each pump.
The injection process of the one-pump three-well has great technical advantages and construction cost advantages (which are not described in detail herein) compared with the single-pump single-well and one-pump multi-well processes, and the injection pump applied to the one-pump three-well process is a proportional control pump, because the pump has the following problems:
1. the service life of a sealing element of the pump is short;
2. the vibration and noise of the pump are large;
3. after the sealing sleeve is abraded, liquid leakage can be caused, high-pressure backflow is generated, and severe shearing of a conveying medium is caused;
4. the pump is inconvenient to maintain and has high maintenance rate.
Flow regulation principle:
the adjustable volume infusion pump is also a reciprocating pump,
Q-Pump Single Cylinder flow (m)3/h）
D-plunger diameter (m)
S-Pump stroke length (m)
n-number of pump reciprocations (rpm)
eta-Pump volumetric efficiency (%)
Here, the flow rate value of the pump can be changed by changing the values of the three parameters D, S, n, and for the variable displacement pump, the flow rate of the pump is changed by changing the "effective" value of S, that is, the modified stroke length of the pump is divided into two parts, namely, an "ineffective" stroke length and an "effective" stroke length, and the pump has no flow rate discharged in the "ineffective" stroke stage, so that the flow rate value of the pump can be adjusted by changing the ratio of the "ineffective" stroke length and the "effective" stroke length.
Disclosure of Invention
In view of the defects of the prior art, the invention provides a low-pressure variable-volume flow regulating method for a volume-regulating injection pump and a regulating mechanism thereof, which can enable a medium to be sheared to always stay in a variable-volume cavity for circulation, not to be mixed with the normally conveyed medium and to participate in the conveying of the medium, and ensure that the conveyed medium is not sheared by the regulating mechanism.
In order to achieve the above object, in one aspect, the present invention provides a low-pressure variable-volume flow rate adjusting method for a variable-volume injection pump, comprising the following steps:
step 1: in the discharge stroke of the pump, the regulating valve is in an open state, the pump cavity is communicated with the variable-volume cavity through a variable-volume channel (a middle channel from the front end of the plunger to the opening of the regulating valve), the pump enters an invalid stroke, the plunger starts to push a medium from a rear starting point, and the medium in the pump cavity enters the variable-volume channel from the pump cavity; the medium in the variable-volume channel enters a variable-volume cavity with lower pressure (lower than the pressure of the middle cavity of the pump) from the variable-volume channel, and is further absorbed by an energy accumulator arranged in the variable-volume cavity;
step 2: the regulating valve is closed, the variable-volume channel and the variable-volume cavity are cut off (closed), the pump enters an effective stroke after an invalid stroke is finished, and the plunger pushes the medium to be discharged into a discharge pipeline of the pump from the pump cavity;
and step 3: the pump enters a suction stroke, the pump cavity is communicated with the variable-volume cavity through the variable-volume channel, and all media discharged into the variable-volume cavity in the invalid stroke stage in the step 1 return to the variable-volume pipeline; the medium in the variable-volume pipeline returns to the pump cavity, and simultaneously the medium in the suction cavity of the pump is sucked into the pump cavity at the later stage of the suction stroke;
and 4, step 4: and (4) repeating the steps 1-3.
The invention has a preferable scheme comprising the following steps:
step 1: in the discharge stroke of the pump, a regulating valve arranged between a variable-volume channel and a variable-volume cavity is in an open state, the pump enters an invalid stroke, a plunger starts to push a medium from a rear starting point, and the medium in a pump cavity enters the variable-volume channel from the pump cavity; the medium in the variable-volume channel enters a variable-volume cavity with lower pressure (lower than the pressure of the middle cavity of the pump) from the variable-volume channel, and is further absorbed by an energy accumulator arranged in the variable-volume cavity;
step 2: when the invalid stroke is finished, the regulating valve is closed, the variable-volume channel and the variable-volume cavity are cut off, the pump enters the valid stroke, and the plunger pushes the medium to be discharged into a discharge pipeline of the pump;
and step 3: when the pump enters a suction stroke, the regulating valve is still in a closed state, the pressure in the pump cavity is reduced, the pressure in the variable volume cavity is greater than the pressure in the pump cavity, the one-way valve arranged between the variable volume channel and the variable volume cavity is opened under the action of pressure, the pump cavity is communicated with the variable volume cavity through the variable volume channel, and part of a medium discharged into the variable volume cavity in an invalid stroke stage returns to the variable volume pipeline; then the regulating valve is opened, and the medium discharged into the variable-volume cavity in the residual invalid stroke stage returns to the variable-volume pipeline; in the suction stroke of the pump, the medium in the suction cavity of the pump is simultaneously sucked into the pump cavity, so that the pump finishes the operation of one period;
the function of arranging a one-way valve (relief valve) between the variable-volume channel and the variable-volume cavity is that when the flow rate of the pump is less than 50%, the medium entering the variable-volume cavity (the part of the liquid volume is larger than the liquid volume discharged into the discharge pipeline) can not be completely returned into the variable-volume pipeline when the regulating valve is opened in step 3, and in order to avoid that the pressure of the variable-volume cavity is infinitely increased due to the blowing ball, the redundant liquid must be returned to the variable-volume pipeline through the one-way valve in the suction stroke stage of the pump.
And 4, step 4: and (4) repeating the steps 1-3.
Preferably, in the specific step, the heat of the medium to and from the regulating valve is taken away by the medium sucked into the cavity of the pump when the heat passes through the cooling device in the variable-volume cavity.
On the other hand, the invention discloses a low-pressure variable-volume flow regulating mechanism for a volume-regulating injection pump, which comprises a variable-volume channel, a regulating valve and a variable-volume cavity; the variable-capacity cavity is connected to the pump cavity through the variable-capacity channel, a regulating valve is arranged between the variable-capacity cavity and the variable-capacity channel, and an energy accumulator is arranged in the variable-capacity cavity.
Preferably, the regulating valve comprises a rotating shaft and a sealing sleeve; the sealing sleeve is sleeved outside the rotating shaft, the rotating shaft and the sealing sleeve are respectively provided with two opposite through holes, and the rotating shaft is connected with the output shaft of the servo motor. The through hole is preferably a circular through hole. The rotating shaft and the sealing sleeve are mutually matched to control the on-off of the variable volume cavity and the variable volume channel through clearance sealing, and the essence is to control the on-off of the variable volume cavity and the pump cavity.
Preferably, the variable-capacity cavity is connected to the variable-capacity channel through a regulating valve; the variable-volume cavity is also connected to the variable-volume channel through a one-way valve (relief valve) for discharging excess medium in the variable-volume cavity.
Preferably, a cooling device is arranged in the variable-volume cavity.
Preferably, a part of the pipeline of the variable volume cavity is sleeved with a heat conducting pipe, and the heat conducting pipe is arranged to be close to the suction cavity of the pump.
Preferably, the volume of the variable-volume channel is larger than the stroke volume of the pump, and the volume of the variable-volume channel is 1.2-1.5 times of the stroke volume under the optimal condition, so that the medium pushed into the variable-volume channel by the plunger from the pump cavity is not sheared by the regulating valve at the invalid stroke stage of the pump, but the same part of medium (the part of medium entering the variable-volume cavity from the variable-volume channel) always returns to the regulating valve and is continuously sheared in the variable-volume cavity in a circulating manner.
The invention is further explained, under the condition that the diameter, the stroke length and the reciprocating times of the plunger of the pump are not changed, the flow rate of the pump is adjusted by changing the effective stroke length of the pump, and the stroke length of the pump is divided into two parts: s = S1+S2Wherein S is1The lost motion of the plunger is a stroke in which no fluid is discharged from a discharge pipe of the pump, and the fluid flows into the variable-volume chamber (low-pressure variable volume) in a low-pressure state by the control medium, is retained in the variable-volume chamber, and circulates therein. S2The active stroke of the plunger is to discharge the fluid out of the pump through the discharge pipe. When the flow of the pump needs to be changed, the invention controls the servo motor to rotate the rotating shaft which rotates at a constant speed in an accelerating or decelerating way, and when the rotating shaft is adjusted to a proper position relative to the sealing sleeve, the rotating shaft returns to the previous constant speed rotating state, thereby changing the effective stroke length, namely achieving the effect of adjusting the quantity.
The invention has the beneficial effects that: the medium to be sheared is always retained in the variable-volume cavity to circulate, and cannot be mixed with the normally conveyed medium and participate in the conveying of the medium, so that the conveyed medium is ensured not to be sheared by the adjusting mechanism.
Drawings
FIG. 1 is a schematic view of the media flow path of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic sectional view at the regulating valve;
in the figure: 1. the device comprises a variable-volume channel, 2, a regulating valve, 3, a variable-volume cavity, 4, an energy accumulator, 5, a rotating shaft, 6, a sealing sleeve, 7, a pump cavity, 8, a plunger, 9, a servo motor, 10, a one-way valve, 11, a cooling device and A, wherein a sheared medium circulates and flows.
Detailed Description
Example 1
The invention discloses a low-pressure variable-volume flow regulating method for a flow regulating injection pump, which comprises the following specific steps when the flow of the pump is equal to 60 percent:
step 1: in the discharge stroke of the pump, a regulating valve arranged between a variable-volume channel and a variable-volume cavity is in an open state, the pump enters an invalid stroke, a plunger starts to push a medium from a rear starting point, and the medium in a pump cavity enters the variable-volume channel from the pump cavity; the medium in the variable-volume channel enters a variable-volume cavity with lower pressure (lower than the pressure of the middle cavity of the pump) from the variable-volume channel, and is further absorbed by an energy accumulator arranged in the variable-volume cavity;
step 2: when the invalid stroke is finished, the regulating valve is closed, the variable-volume channel and the variable-volume cavity are cut off, the pump enters the valid stroke, and the plunger pushes the medium to be discharged into a discharge pipeline of the pump;
and step 3: the pump enters a suction stroke, a one-way valve arranged below a regulating valve is opened, the regulating valve is still in a closed state, and a medium in a suction cavity of the pump is sucked into a pump cavity at the same time; then the regulating valve is opened, the medium discharged into the variable volume cavity at all invalid stroke stages returns to the variable volume pipeline, and simultaneously the medium in the suction cavity of the pump is continuously sucked into the pump cavity, so that the pump finishes the operation of one period;
and 4, step 4: and (4) repeating the steps 1-3.
The heat of the medium going to and from the regulating valve in the steps 1-4 is taken away by the medium sucked into the cavity of the pump when passing through the cooling device in the variable-volume cavity.
On the other hand, the invention discloses a low-pressure variable-capacity flow regulating mechanism for a volume-regulating injection pump, which comprises a variable-capacity channel 1, a regulating valve 2 and a variable-capacity cavity 3, as shown in fig. 2; the variable-capacity cavity 3 is connected to the pump cavity 7 through the variable-capacity channel 1, the regulating valve 2 is arranged between the variable-capacity cavity 3 and the variable-capacity channel 1, and the energy accumulator 4 is arranged in the variable-capacity cavity 3.
Wherein the regulating valve 2 comprises a rotating shaft 5 and a sealing sleeve 6; the sealing sleeve 6 is sleeved outside the rotating shaft 5, two opposite circular through holes are respectively formed in the rotating shaft 5 and the sealing sleeve 6, and the rotating shaft 5 is connected with an output shaft of the servo motor 9. The rotating shaft 5 and the sealing sleeve 6 are mutually matched to control the on-off of the variable volume cavity 3 and the variable volume channel 1 through clearance sealing, and the essence is to control the on-off of the variable volume cavity 3 and the pump cavity 7, one stroke of the pump and 180-degree rotation of the rotating shaft.
In the variable volume chamber 3, a cooling device 11 is provided, and as shown in fig. 2, a heat pipe is sleeved on a part of the pipe of the variable volume chamber 3, and the heat pipe is arranged in close contact with the suction chamber of the pump.
The volume of the variable-volume channel 3 is 1.2 times of the stroke volume, so that the medium pushed into the variable-volume channel 3 by the plunger 8 from the pump cavity cannot be sheared by the regulating valve in the invalid stroke stage of the pump, but the same part of medium (the part of medium entering the variable-volume cavity from the variable-volume channel) always returns to the regulating valve 2 and circulates in the variable-volume cavity 3 to be sheared continuously.
Example 2
The invention discloses a low-pressure variable-volume flow regulating method for a flow regulating injection pump, which comprises the following specific steps when the flow of the pump is equal to 40 percent:
step 1: in the discharge stroke of the pump, a regulating valve arranged between a variable-volume channel and a variable-volume cavity is in an open state, the pump enters an invalid stroke, a plunger starts to push a medium from a rear starting point, and the medium in a pump cavity enters the variable-volume channel from the pump cavity; the medium in the variable-volume channel enters a variable-volume cavity with lower pressure (lower than the pressure of the middle cavity of the pump) from the variable-volume channel, and is further absorbed by an energy accumulator arranged in the variable-volume cavity;
step 2: when the invalid stroke is finished, the regulating valve is closed, the variable-volume channel and the variable-volume cavity are cut off, the pump enters the valid stroke, and the plunger pushes the medium to be discharged into a discharge pipeline of the pump;
and step 3: the pump enters a suction stroke, the regulating valve is still in a closed state, the one-way valve arranged between the variable-volume channel and the variable-volume cavity is opened under the action of pressure, the pump cavity is communicated with the variable-volume cavity through the variable-volume channel, and part of a medium discharged into the variable-volume cavity in an invalid stroke stage returns to the variable-volume pipeline; then the regulating valve is opened, and the medium discharged into the variable-volume cavity in the residual invalid stroke stage returns to the variable-volume pipeline; in the suction stroke of the pump, the medium in the suction cavity of the pump is simultaneously sucked into the pump cavity, so that the pump finishes the operation of one period;
and 4, step 4: and (4) repeating the steps 1-3.
The heat of the medium going to and from the regulating valve in the steps 1-4 is taken away by the medium sucked into the cavity of the pump when passing through the cooling device in the variable-volume cavity.
On the other hand, the invention discloses a low-pressure variable-capacity flow regulating mechanism for a volume-regulating injection pump, which comprises a variable-capacity channel 1, a regulating valve 2 and a variable-capacity cavity 3, as shown in fig. 2; the variable-capacity cavity 3 is connected to the pump cavity 7 through the variable-capacity channel 1, the regulating valve 2 is arranged between the variable-capacity cavity 3 and the variable-capacity channel 1, and the energy accumulator 4 is arranged in the variable-capacity cavity 3.
Wherein the regulating valve 2 comprises a rotating shaft 5 and a sealing sleeve 6; the sealing sleeve 6 is sleeved outside the rotating shaft 5, two opposite circular through holes are respectively formed in the rotating shaft 5 and the sealing sleeve 6, and the rotating shaft 5 is connected with an output shaft of the servo motor 9. The rotating shaft 5 and the sealing sleeve 6 are mutually matched to control the on-off of the variable volume cavity 3 and the variable volume channel 1 through clearance sealing, and the essence is to control the on-off of the variable volume cavity 3 and the pump cavity 7.
The variable volume cavity 3 is connected to the variable volume channel 1 through the regulating valve 2, and the variable volume cavity 3 is also connected to the variable volume channel 1 through the check valve 10 (release valve), and the check valve 10 is used for discharging redundant media in the variable volume cavity 3.
In the variable volume chamber 3, a cooling device 11 is provided, and as shown in fig. 2, a heat pipe is sleeved on a part of the pipe of the variable volume chamber 3, and the heat pipe is arranged in close contact with the suction chamber of the pump.
The volume of the variable-volume channel 3 is 1.5 times of the stroke volume, so that the medium pushed into the variable-volume channel 3 by the plunger 8 from the pump cavity is not sheared by the regulating valve at the invalid stroke stage of the pump, but the same part of medium (the part of medium entering the variable-volume cavity from the variable-volume channel) always returns to the regulating valve 2 and circulates in the variable-volume cavity 3 to be sheared continuously.
Claims (10)
1. The low-pressure variable-volume flow adjusting method for the variable-volume injection pump is characterized by comprising the following steps of: comprises a variable-capacity channel, a regulating valve and a variable-capacity cavity; the variable volume cavity is connected to the pump cavity through the variable volume channel, sets up the governing valve between variable volume cavity and the variable volume channel, sets up the energy storage ware in the variable volume cavity, and concrete step is as follows:
step 1: in the discharging stroke of the pump, the regulating valve is in an open state, the pump cavity is communicated with the variable-volume cavity through the variable-volume channel, the pump enters an invalid stroke, and the plunger starts to push a medium from a rear starting point to enter the variable-volume cavity with lower pressure from the variable-volume channel and be absorbed by an energy accumulator arranged in the variable-volume cavity;
step 2: when the invalid stroke is finished, the regulating valve is closed, the variable-volume channel is cut off from the variable-volume cavity, the pump enters the valid stroke, and the plunger pushes the medium to be discharged into a discharge pipeline of the pump;
and step 3: the pump enters a suction stroke, the regulating valve is in a closed state, the one-way valve arranged between the variable-volume channel and the variable-volume cavity is opened under the action of pressure, the pump cavity is communicated with the variable-volume cavity through the variable-volume channel, and all media discharged into the variable-volume cavity in an invalid stroke stage return to the variable-volume channel; the medium in the suction chamber of the pump is also sucked into the pump chamber during the suction stroke of the pump;
and 4, step 4: and (4) repeating the steps 1-3.
2. The method of claim 1, wherein the method comprises the steps of:
step 1: in the discharge stroke of the pump, a regulating valve arranged between a variable-volume channel and a variable-volume cavity is in an open state, the pump enters an invalid stroke, and a plunger starts to push a medium from a rear starting point to enter the variable-volume cavity with lower pressure from the variable-volume channel and is absorbed by an energy accumulator arranged in the variable-volume cavity;
step 2: the regulating valve is closed, the invalid stroke is finished, the variable-volume channel and the variable-volume cavity are cut off, the pump enters the valid stroke, and the plunger pushes the medium to be discharged into a discharge pipeline of the pump;
and step 3: the pump enters a suction stroke, the regulating valve is in a closed state, the one-way valve arranged between the variable-volume channel and the variable-volume cavity is opened under the action of pressure, the pump cavity is communicated with the variable-volume cavity through the variable-volume channel, and part of a medium discharged into the variable-volume cavity in an invalid stroke stage returns to the variable-volume pipeline; then the regulating valve is opened, and the medium discharged into the variable-volume cavity in the residual invalid stroke stage returns to the variable-volume pipeline; in the suction stroke of the pump, a medium in the suction cavity of the pump is sucked into the pump cavity at the same time;
and 4, step 4: and (4) repeating the steps 1-3.
3. The method of claim 1, wherein the method comprises the steps of: in the specific step, the heat of the medium to and from the regulating valve is taken away by the medium sucked into the cavity of the pump when passing through the cooling device in the variable-volume cavity.
4. A low pressure varactor flow adjustment mechanism for adjusting volume infusion pump, its characterized in that: comprises a variable-capacity channel, a regulating valve and a variable-capacity cavity; the variable-capacity cavity is connected to the pump cavity through the variable-capacity channel, a regulating valve is arranged between the variable-capacity cavity and the variable-capacity channel, and an energy accumulator is arranged in the variable-capacity cavity.
5. The low pressure positive displacement flow adjustment mechanism for a variable displacement infusion pump of claim 4, wherein: the regulating valve comprises a rotating shaft and a sealing sleeve; the sealing sleeve is sleeved outside the rotating shaft, two opposite through holes are respectively formed in the rotating shaft and the sealing sleeve, and the rotating shaft is connected with the output shaft of the servo motor.
6. The low pressure positive displacement flow adjustment mechanism for a variable displacement infusion pump of claim 4, wherein: the variable-capacity cavity is connected to the variable-capacity channel through the regulating valve, and the variable-capacity cavity is further connected to the variable-capacity channel through the one-way valve.
7. The low pressure positive displacement flow adjustment mechanism for a variable displacement infusion pump of claim 4, wherein: and a cooling device is arranged in the variable-volume cavity.
8. The low pressure positive displacement flow adjustment mechanism for a variable displacement infusion pump of claim 4, wherein: and sleeving a part of pipelines of the variable volume cavity with a heat conduction pipe, wherein the heat conduction pipe is arranged to be close to the suction cavity of the pump.
9. A low pressure positive displacement flow regulator for a variable displacement infusion pump according to any of claims 4 to 8, wherein: the volume of the positive displacement passage is greater than the stroke volume of the pump.
10. The low pressure positive displacement flow adjustment mechanism for a variable displacement infusion pump of claim 9, wherein: the volume of the variable-volume channel is 1.2-1.5 times of the stroke volume.
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| CN201710765173.6A CN107387387B (en) | 2017-08-30 | 2017-08-30 | Low-pressure variable-volume flow adjusting method and adjusting mechanism for flow-adjusting injection pump |
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| CN107387387B true CN107387387B (en) | 2020-01-14 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1171833A (en) * | 1994-11-07 | 1998-01-28 | 米歇尔·夏特兰 | Piston pump |
| CN2348096Y (en) * | 1998-05-06 | 1999-11-10 | 江苏石油勘探局石油工程技术研究院 | Liquid carbon dioxide injection device |
| CN202108711U (en) * | 2011-06-13 | 2012-01-11 | 王湫锂 | Proportion adjustment pump of ternary injection and polymer injection for oil field |
| CN103016293A (en) * | 2012-12-05 | 2013-04-03 | 王湫锂 | Adjustable-flow injection pump |
| CN207297310U (en) * | 2017-08-30 | 2018-05-01 | 王湫锂 | A kind of low pressure transfiguration flow control device for adjustable-flow injection pump |
-
2017
- 2017-08-30 CN CN201710765173.6A patent/CN107387387B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1171833A (en) * | 1994-11-07 | 1998-01-28 | 米歇尔·夏特兰 | Piston pump |
| CN2348096Y (en) * | 1998-05-06 | 1999-11-10 | 江苏石油勘探局石油工程技术研究院 | Liquid carbon dioxide injection device |
| CN202108711U (en) * | 2011-06-13 | 2012-01-11 | 王湫锂 | Proportion adjustment pump of ternary injection and polymer injection for oil field |
| CN103016293A (en) * | 2012-12-05 | 2013-04-03 | 王湫锂 | Adjustable-flow injection pump |
| CN207297310U (en) * | 2017-08-30 | 2018-05-01 | 王湫锂 | A kind of low pressure transfiguration flow control device for adjustable-flow injection pump |
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| CN107387387A (en) | 2017-11-24 |
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