CN201433746Y - Constant working fluid level control structure of beam pumping unit - Google Patents
Constant working fluid level control structure of beam pumping unit Download PDFInfo
- Publication number
- CN201433746Y CN201433746Y CN2009201324093U CN200920132409U CN201433746Y CN 201433746 Y CN201433746 Y CN 201433746Y CN 2009201324093 U CN2009201324093 U CN 2009201324093U CN 200920132409 U CN200920132409 U CN 200920132409U CN 201433746 Y CN201433746 Y CN 201433746Y
- Authority
- CN
- China
- Prior art keywords
- control
- fluid level
- control structure
- working fluid
- frequency converter
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model discloses an open-loop brake-free frequency-conversion constant working fluid level control structure of an intelligent beam pumping unit. The control structure comprises a frequencyconverter, a power distribution switch, an alternating current contactor, a control center, a cabinet and a display interface. The technical scheme includes that software control is adopted to replace a brake device in conventional frequency-conversion control, thereby simplifying hardware and decreasing cost; a working fluid level estimating mold is built to dynamically control a working fluid level in an optimal state without any externally added sensors, thereby improving production efficiency, saving energy, reducing consumption, realizing unmanned production and improving production automation level.
Description
Technical field
The utility model relates to the pumping unit of Oilfield using, specifically is a kind of intelligent beam pumping unit open loop brakeless frequency conversion perpetual motion level control structure.
Background technology
At present, the most general with beam pumping unit in the pumping unit of Oilfield using, quantity is also maximum.Its operating principle is to drag oil well pump by the running of ac motor constant speed, moves back and forth along the action of gravity direction, thereby crude oil is extracted into ground from hundreds of down-holes to thousands of meters.Load inertia is bigger, is again cyclic loading, and rising, descending stroke load characteristic are also different, and decline fashion has the potential load characteristic, causes motor to enter regenerative power generation state, and excess energy is fed back to electrical network.The special geographical environment that recovers the oil in the oil field has determined oil production equipment that its unique operation characteristic is arranged: stroke and the jig frequency that need regulate oil pumper according to the variation of oilbearing stratum producing fluid level and oil pump capacity.
The traditional adjustment beam pumping unit stroke and the way of jig frequency are sucker rod hook position and gearratio; the mode that belongs to mechanical step type; need shutdown operation also rule of thumb to adjust with indicator card, every adjustment once quite bothers, and also is difficult to accurately be adjusted to optimum state.
The adjusting of adopting frequency converter that oil pumper is carried out jig frequency is by universally recognized scheme in the industry, is the main trend of oil pumping technological transformation.The soft start characteristic of frequency converter, to the raising of net side power factor, to the adjustment performance of motor speed with and energy-efficient all be that other scheme is unapproachable.But, owing to generating state can occur in the oil pumper running, can cause the frequency converter dc voltage to raise, cause the overvoltage disorderly closedown.For guaranteeing that frequency converter can normally move, existing solution has: 1, add dynamic braking resistance in the frequency converter DC loop; 2, add energy back feed device or adopt four-quadrant frequency converter to replace universal frequency converter in the frequency converter DC loop; 3, adopt many frequency converters DC bus powered altogether.Scheme 1 on resistance, is unfavorable for energy-conservation power consumption; Scheme 2 costs are very high; Scheme 3 implements the comparison difficulty, and limitation is big.Existing variable frequency control all is the jig frequency of manual adjustments oil pumper simultaneously, and automaticity is low, and the control effect also is difficult to accomplish the best.
The utility model content
At above-mentioned technical problem, the technical problems to be solved in the utility model is to adopt frequency converter that oil pumper is carried out speed regulating control, avoids motor to operate in generating state and improves device efficiency.
For realizing this technical purpose, a kind of beam pumping unit perpetual motion level control structure of the present utility model is characterized in that comprising frequency converter, panel switches and A.C. contactor; Described control structure also comprises control centre, rack and display interface, wherein:
Control centre is made up of PLC and the special-purpose control of oil pumper software, finishes current of electric, power, voltage and torque and detects, and line voltage and frequency converter DC voltage are gathered; Also comprise DC voltage control model, producing fluid level estimation and control model, frequency converter frequency output control, display interface exchanges data and information storage;
Display interface provides parameter, demonstration and warning message demonstration is set;
Rack comprises ventilation and temperature control equipment, rainproof moistureproof dustproof construction.
Described control structure also is provided with the reserve bypass.
The technical program employing software control has substituted the braking equipment in the former variable frequency control, simplifies hardware, reduces cost; By setting up the producing fluid level appraising model, under without any the situation of additional sensor, dynamically control producing fluid level in optimum state, enhance productivity, save energy and reduce the cost, realize unmanned production, improve production automation level.
Description of drawings
Fig. 1 is a frame construction drawing of the present utility model.
The specific embodiment
Basic ideas of the present utility model are: 1, automatic variation according to the frequency converter dc voltage, the speed of the upper and lower stroke of control oil pumper, prevent that motor from entering the dynamic brake state, thereby can cancel all measures for guaranteeing that the normal operation of frequency converter is taked in the former technology, reduce equipment cost, improve reliability.2, according to the periodic load variations situation of oil pumper, need not to install additional under the situation of any external sensor, calculate the height of producing fluid level automatically, thereby make producing fluid level remain on optimum state by automatic adjusting jig frequency, to improve pumping efficiency, reach energy saving purposes.
As shown in Figure 1, main circuit of the present invention is made up of universal frequency converter, panel switches, A.C. contactor, has considered the reserve bypass.Control centre is made up of PLC and the special-purpose control of oil pumper software, finishes data acquisition, computing and control output, and man-machine interface adopts the liquid crystal text display.For this equipment can be widely used in the different oil fields environment of China, consider three anti-designs in the equipment, and added high temperature resistant and temperature control system low temperature.
The utility model reduces equipment cost, improves automatization level, further enhances productivity and energy-saving effect, makes the real popularization and application of converter technique energy in the transformation of oil pumper.
Claims (2)
1, a kind of beam pumping unit perpetual motion level control structure is characterized in that comprising frequency converter, panel switches and A.C. contactor; Described control structure also comprises control centre, rack and display interface, wherein:
Control centre is made up of PLC and the special-purpose control of oil pumper software, finishes current of electric, power, voltage and torque and detects, and line voltage and frequency converter DC voltage are gathered; Also comprise DC voltage control model, producing fluid level estimation and control model, frequency converter frequency output control, display interface exchanges data and information storage;
Display interface provides parameter, demonstration and warning message demonstration is set;
Rack comprises ventilation and temperature control equipment, rainproof moistureproof dustproof construction.
2, control structure according to claim 1 is characterized in that, described control structure also is provided with the reserve bypass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201324093U CN201433746Y (en) | 2009-05-31 | 2009-05-31 | Constant working fluid level control structure of beam pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201324093U CN201433746Y (en) | 2009-05-31 | 2009-05-31 | Constant working fluid level control structure of beam pumping unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201433746Y true CN201433746Y (en) | 2010-03-31 |
Family
ID=42052556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201324093U Expired - Lifetime CN201433746Y (en) | 2009-05-31 | 2009-05-31 | Constant working fluid level control structure of beam pumping unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201433746Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885367A (en) * | 2014-04-01 | 2014-06-25 | 东营东日电气有限公司 | Pumping unit intelligent control system and method based on optimal stroke frequency identification |
-
2009
- 2009-05-31 CN CN2009201324093U patent/CN201433746Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885367A (en) * | 2014-04-01 | 2014-06-25 | 东营东日电气有限公司 | Pumping unit intelligent control system and method based on optimal stroke frequency identification |
| CN103885367B (en) * | 2014-04-01 | 2016-04-06 | 东营东日电气有限公司 | A kind of intelligent controlling system for beam-pumping unit based on optimum jig frequency identification and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107154621B (en) | Virtual synchronous generator control method of DC-DC converter of DC microgrid energy storage unit | |
| CN203119818U (en) | Oil-pumping-unit dedicated switch reluctance motor speed regulation system | |
| CN205001612U (en) | Solar energy power supply and cell -phone remote control executor | |
| CN101767424B (en) | Injection molding machine and injection molding method | |
| CN201118513Y (en) | Efficiency optimization control system for three-phase inductance electromotor | |
| CN201433746Y (en) | Constant working fluid level control structure of beam pumping unit | |
| CN202218189U (en) | Load follow-up self-adapting power saving device special for pumping unit | |
| CN101860316A (en) | Self-adaptive load following control technical system | |
| CN102130649A (en) | Voltage regulation and speed regulation control system of full-digital speed and current double closed-loop alternating current motor | |
| CN202143028U (en) | Frequency conversion speed regulating control device of three-phase alternating current asynchronous motor | |
| CN205804491U (en) | A kind of constant pressure water supply system | |
| CN201536334U (en) | Chopped-controlled three-phase AC motor energy-saving controller | |
| CN202395458U (en) | Dynamic reactive power compensation energy-saving device of pumping unit | |
| CN204721028U (en) | A kind of Solar-energy elevator control system | |
| CN204967682U (en) | Dc motor system with velocity feedback | |
| CN203330567U (en) | Alternating-current drive plasma cutting machine | |
| CN203188293U (en) | Constant-pressure water supply system | |
| CN202564971U (en) | Energy regeneration system of frequency converter aging test link | |
| CN203313115U (en) | High power vector inversion control device | |
| CN103001571B (en) | Synchronous regulation electricity-saving device is followed the tracks of in motor load | |
| CN203840246U (en) | Novel energy-saving common DC-bus double-shaft servo driving system | |
| CN201579965U (en) | Injection molding machine | |
| CN203871865U (en) | Pumping unit intelligent on-site compensation device | |
| CN203722523U (en) | Energy-conservation control system for pumping unit | |
| CN102035462A (en) | Three-phase fan frequency conversion power saver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Shenzhen SiFang Electric Power-saving Co., Ltd. Document name: Notification to Pay the Fees |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518000 Guangdong city of Shenzhen province Nanshan District nine Guangdong streets south of Shenzhen Bay ecological science and Technology Park Building 6 Room 516 Patentee after: Shenzhen City Li Chuan Zhi Control Technology Co., Ltd. Address before: 518000 south side of A Dong 1 building, Longjing second industrial district, Shenzhen, Nanshan District, Shenzhen, Guangdong Patentee before: Shenzhen SiFang Electric Power-saving Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100331 |