CN107165798B - Oil well dosing pump - Google Patents
Oil well dosing pump Download PDFInfo
- Publication number
- CN107165798B CN107165798B CN201710595074.8A CN201710595074A CN107165798B CN 107165798 B CN107165798 B CN 107165798B CN 201710595074 A CN201710595074 A CN 201710595074A CN 107165798 B CN107165798 B CN 107165798B
- Authority
- CN
- China
- Prior art keywords
- piston rod
- oil well
- pressure plate
- dosing pump
- buffer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
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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
- F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
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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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- 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
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
- F04B9/06—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means including spring- or weight-loaded lost-motion devices
Abstract
The invention relates to an oil well dosing pump, which is a tool for injecting a medicament into an oil well by pushing a piston rod of the dosing pump through a pressure plate arranged on a polished rod. In order to ensure that the piston rod of the oil well dosing pump can stably reach the bottom dead center each time in the working process, a buffer device is arranged between the piston rod with accurate dosing quantity and the pressure plate, and an adjusting cap which is sleeved on the piston rod and can control the rebound height of the piston rod is sleeved, and the rebound height of the piston rod can be accurately adjusted by rotating the adjusting cap, so that the accurate control of the discharge capacity is realized; the motion speed of the piston rod is not completely the same with that of a pressure plate fixed on the polish rod after the piston rod is contacted with the pressure plate downwards, and the stroke of the piston rod does not depend on the synchronous stroke of the piston rod after the piston rod is contacted with the pressure plate, so that the displacement is conveniently and accurately adjusted, the oil well dosing pump is prevented from being damaged by impact, each stroke of the piston reaches the bottom dead center, the clearance is reduced, and the dosing accuracy is improved.
Description
Technical Field
The invention belongs to oil well ground auxiliary equipment, in particular to a method for preparing a composite material, which comprises the following steps: the chemical feeding device is a tool for pushing a chemical feeding pump piston arranged at a wellhead to feed chemicals into an oil well through a pressure plate arranged at the polished rod part of the oil well.
Background
The oil well wellhead chemical adding device in oil exploitation is more, and the chemical adding device mainly comprises various chemical adding modes such as electric and mechanical modes, drip by gravity and the like. Chinese patent (application number: 200820011941.5) discloses a wellhead continuous dosing device which belongs to a mechanical type and can realize a basic dosing function. However, this dosing device exists: the installation and debugging are complicated, the medicament filling is not accurate, the filling amount is not easy to adjust, and the like.
Disclosure of Invention
In order to overcome the problems, the invention provides an oil well dosing pump which solves the problems that dosing is not accurate and the dosing amount is not easy to control and adjust in the prior art.
The technical scheme adopted for realizing the purpose of the invention is as follows: the dosing pump which comprises a body, a piston rod, a sealing ring, an adjusting cap, a return spring, a liquid inlet and outlet valve, a pressure plate fixed on a polished rod and the like is provided with a buffer device between the upper end of the piston rod and the pressure plate, and an adjusting cap which is sleeved on the piston rod and can control the rebound height of the piston rod, the adjusting cap is in threaded connection with the body, the rebound height of the piston rod can be accurately adjusted by rotating the adjusting cap so as to realize accurate control of the discharge capacity, the buffering device is in a compressed state when the piston rod of the dosing pump is at a lower dead point, thus, the piston rod can reach the bottom dead center in each stroke, the piston rod and the pressure plate do not move completely synchronously after contacting downwards, the stroke of the piston rod does not depend on the synchronous stroke after the piston rod is contacted with the pressure plate any more, so that the displacement is convenient and accurate to adjust, and the requirement on the precision of the installation position of the pressure plate is greatly reduced.
The beneficial effects brought by the invention are as follows: on the premise of hardly increasing the manufacturing cost, the difficulty of installation and debugging of the dosing pump is reduced, the filling precision is improved, and the possibility of air lock of the dosing pump is reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of an embodiment of an oil well dosing pump;
FIG. 2 shows a pressure plate buffer spring built-in buffer device;
FIG. 3 is a buffering mechanism with an external pressure plate buffering spring;
fig. 4 shows a pressure plate torsion spring type damper.
In the figure, (1) a buffer cap, (2) a buffer spring, (3) a positioning pin shaft forms a so-called buffer device, (4) a piston rod, (5) an adjusting cap, (6) a return spring, (7) a body, (8) a liquid inlet and outlet valve, (9) a sealing ring, (10) a polish rod, and (11) a pressure plate.
Detailed Description
In the figure 1, parts of a buffer cap (1), a positioning pin shaft (3), a piston rod (4), an adjusting cap (5), a body (7) and a liquid inlet and outlet valve (8) are machined; the buffer spring (2) and the return spring (6) are formed by cold winding and high-temperature heat treatment sizing, the buffer cap (1) is fixed on the upper part of the piston rod (4) by the positioning pin shaft (3), and the buffer spring (2) is arranged in the buffer cap (1) in a compressed state; the sealing ring (9) is formed by high-temperature vulcanization and is arranged in a cutting groove at the lower end of the piston rod (4); the adjusting cap (5) is connected with the body (7) through threads, and the adjusting cap (5) is contacted with the upper end face of a shoulder in the middle of the piston rod (4); the return spring (6) surrounds the piston rod (4) and is arranged in the body (7) in a compressed state; the oil inlet and outlet valve (8) is in threaded connection with the side of the body (7); the pressing plate (11) is arranged on the polish rod (10).
The power of the oil well dosing pump comes from the downward gravity of the oil pumping unit, when the polished rod (10) moves downward, the pressure plate (11) fixed on the polished rod (10) pushes the piston rod (4) to compress the medicament in the body (7) through the buffer device, and the medicament is injected into the oil well; when the pumping unit moves upwards, the return spring (6) pushes the piston rod (4) to move upwards for returning, and suction and discharge of the medicament are completed.
Fig. 2, 3 and 4 show several ways of damping devices mounted on the pressure plate, which function in accordance with the damping device on the upper end of the piston rod. Any other form of damping between the piston rod and the pressure plate is within the scope of the present invention.
Claims (1)
1. The utility model provides an oil well dosing pump by body, piston rod, sealing washer, advance to go out liquid valve, pressure disk, return spring etc. and constitute which characterized by: a buffer device and an adjusting cap are sleeved on the piston rod and in threaded connection with the body, the buffer device and the adjusting cap are separately arranged, a buffer spring is arranged in the buffer cap of the buffer device, a guide groove is formed in the buffer cap, and a positioning pin shaft is fixed with the piston rod and matched with the guide groove; the buffering device is in a compressed state when the piston rod of the dosing pump is at the bottom dead center, so that the piston rod can reach the bottom dead center in each stroke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710595074.8A CN107165798B (en) | 2017-07-20 | 2017-07-20 | Oil well dosing pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710595074.8A CN107165798B (en) | 2017-07-20 | 2017-07-20 | Oil well dosing pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107165798A CN107165798A (en) | 2017-09-15 |
| CN107165798B true CN107165798B (en) | 2020-08-07 |
Family
ID=59818029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710595074.8A Active CN107165798B (en) | 2017-07-20 | 2017-07-20 | Oil well dosing pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107165798B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109498349A (en) * | 2019-01-22 | 2019-03-22 | 孙双双 | A kind of clinical obstetrics auxiliary natural labor device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB359963A (en) * | 1930-06-20 | 1931-10-20 | Ernest Arthur Hailwood | Improvements in pumps |
| CN2204865Y (en) * | 1994-07-11 | 1995-08-09 | 西安公路学院 | Buffer trunk piston dosing pump |
| US20070253849A1 (en) * | 2006-04-27 | 2007-11-01 | Campbell Hausfeld/Scott Fetzer Company | Pump with variable stroke piston |
| CN201173107Y (en) * | 2008-04-03 | 2008-12-31 | 张广勇 | Wellhead continuous medicament-adding device |
| CN201265518Y (en) * | 2008-10-09 | 2009-07-01 | 陈国� | Interlocked dosing pump of oil well |
| CN102852755A (en) * | 2011-07-28 | 2013-01-02 | 南通天华和睿科技创业有限公司 | Plunger type chemical feeding pump |
| CN203640947U (en) * | 2013-12-24 | 2014-06-11 | 中国石油化工股份有限公司胜利油田分公司清河采油厂 | Vertical type high-pressure automatic reagent adding pump |
| CN207278435U (en) * | 2017-07-20 | 2018-04-27 | 东营市海天石油科技有限责任公司 | Oil well dosing pump |
-
2017
- 2017-07-20 CN CN201710595074.8A patent/CN107165798B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107165798A (en) | 2017-09-15 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liu Qingmin Inventor after: Nie Liping Inventor after: Cui Tao Inventor after: Xin Siying Inventor after: Yao Lianyong Inventor before: Liu Yuwen Inventor before: Xu Jiajun Inventor before: Liu Jiming Inventor before: Nie Liping Inventor before: Cui Rudong Inventor before: Cui Tao Inventor before: Xin Siying Inventor before: Yao Lianyong Inventor before: Liu Jiayi |