CN-121993112-A - Automatic crank balance adjusting device for pumping unit, pumping unit and method

CN121993112ACN 121993112 ACN121993112 ACN 121993112ACN-121993112-A

Abstract

The invention discloses an automatic crank balance adjusting device of an oil pumping machine, the oil pumping machine and a method, the automatic crank balance adjusting device comprises a connecting piece, the connecting piece is used for connecting a balance block, a balance block moving mechanism is arranged on the connecting piece, a balance block locking mechanism is arranged on the connecting piece, the balance block moving mechanism comprises a first driving device and a moving assembly, the moving assembly can be connected with the balance block, the first driving device drives the moving assembly, the balance block locking mechanism comprises a second driving device and a driven nut, the driven nut is used for replacing a balance block fixing nut, and the second driving device drives the driven nut. The invention uses the driven nut to replace the fixed nut of the fixed bolt of the balance weight, and creates conditions for automatically adjusting balance by driving connection with a second driving device.

Inventors

HAO HONGFENG
MIAO LIJUN
LIU BUFENG
SHI XIAOMAN
ZHANG HAIBIN
XU HUIXING
LIU YING

Assignees

中国石油化工股份有限公司
中国石油化工股份有限公司胜利油田分公司

Dates

Publication Date: 20260508
Application Date: 20241101

Claims (14)

1. The automatic crank balance adjusting device of the pumping unit comprises a connecting piece, wherein the connecting piece is used for connecting a balance weight, and is characterized in that the connecting piece is provided with a balance weight moving mechanism and a balance weight locking mechanism; The balance weight moving mechanism comprises a first driving device and a moving assembly, wherein the moving assembly can be connected with the balance weight, and the first driving device drives the moving assembly; the balance block locking mechanism comprises a second driving device and a driven nut, wherein the driven nut is used for replacing the balance block fixing nut, and the second driving device drives the driven nut.
2. The automatic balance adjustment device of the crank of the pumping unit according to claim 1, wherein the output shaft of the first driving device is provided with a turbine, the moving assembly comprises a worm, a driving shaft and a driving gear which are sequentially connected, the worm is meshed with the turbine, the driving shaft is used for being rotationally connected with a balance block, and the driving gear is used for being meshed with a rack on the crank; The output shaft of the second driving device is provided with a driving gear, the driven nut is a gear nut, and the driving gear is in transmission connection with the gear nut.
3. The automatic crank balance adjusting device of the pumping unit according to claim 2, wherein the connecting piece is a balance block cover body, and the balance block cover body comprises an inner side plate, an outer side plate, a left side plate and a right side plate; The balance block cover body is provided with a balance block connecting cavity and an execution equipment accommodating cavity, the balance block connecting cavity is arranged above the execution equipment accommodating cavity, and the balance block connecting cavity is communicated with the execution equipment accommodating cavity; the execution equipment accommodating cavity is provided with a balance weight moving mechanism and a balance weight locking mechanism, and windows are formed in the execution equipment accommodating cavity by the inner side plate, the outer side plate, the left side plate and the right side plate and are used for installing and maintaining equipment.
4. The automatic crank balance adjusting device for pumping unit according to claim 3, wherein the first driving device is an internal motor, the internal plate is provided with an internal sealing cover in the execution equipment accommodating cavity, and the internal motor is vertically arranged on the inner wall of the internal sealing cover; the outer side plate is provided with an outer sealing cover corresponding to the inner sealing cover.
5. The automatic crank balance adjusting device of the pumping unit according to claim 4, wherein the balance block locking mechanism comprises a left locking mechanism and a right locking mechanism, the second driving device is divided into a left motor and a right motor, and the gear nut is divided into a left gear nut and a right gear nut.
6. The automatic crank balance adjusting device of the pumping unit according to claim 5, wherein the left side plate is provided with a left sealing cover, the left motor is vertically arranged on the inner wall of the left sealing cover, an output shaft of the left motor is fixedly provided with a left driving gear, and the left driving gear is in transmission connection with a left gear nut through a left reduction transmission gear set; The left reduction transmission gear set comprises a left transmission shaft, a left middle big gear and a left middle small gear, wherein the left middle big gear and the left middle small gear are sleeved on the left transmission shaft; the left driving gear is meshed with the left middle large gear, and the left middle small gear is meshed with the left gear nut.
7. The automatic crank balance adjustment device of the pumping unit according to claim 6, wherein the right locking mechanism and the left locking mechanism are identical in structure and are arranged in opposite directions; The right side plate is provided with a right sealing cover, the right motor is vertically arranged on the inner wall of the right sealing cover, the output shaft of the right motor is fixedly provided with a right driving gear, and the right driving gear is in transmission connection with a right gear nut through a right reduction transmission gear set; The right reduction transmission gear set comprises a right transmission shaft, a right middle big gear and a right middle small gear, wherein the right middle big gear and the right middle small gear are sleeved on the right transmission shaft; The right driving gear is meshed with the right middle large gear, and the right middle small gear is meshed with the right gear nut.
8. The automatic crank balance adjusting device of the pumping unit according to claim 7, wherein the left fixing frame comprises a first upper fixing plate, a first middle fixing plate and a first lower fixing plate, and the first upper fixing plate, the first middle fixing plate and the first lower fixing plate are fixed on the inner wall of the left sealing cover in a parallel arrangement from top to bottom; the first upper fixing plate is provided with a first left round through hole for installing a left motor, and is provided with a second left round through hole, and the second left round through hole is positioned on the right side of the first left round through hole; The left transmission shaft is rotatably arranged in the second left circular through hole, the third left circular through hole and the fourth left circular through hole; The right fixing frame comprises a second upper fixing plate, a second middle fixing plate and a second lower fixing plate, and the second upper fixing plate, the second middle fixing plate and the second lower fixing plate are fixedly arranged on the inner wall of the right sealing cover from top to bottom in parallel; The first upper fixing plate is provided with a first right circular through hole for installing a right motor, and is provided with a second right circular through hole, and the second right circular through hole is positioned on the right side of the first right circular through hole; the right transmission shaft is rotatably arranged in the second right circular through hole, the third right circular through hole and the fourth right circular through hole.
9. The automatic crank balance adjusting device of the pumping unit according to claim 3, wherein the outer side plate of the balance block cover body is provided with a fixed through hole corresponding to the balance block lifting hole in the balance block connecting cavity, and a tensioning sleeve with a counter bore is inserted and welded in the fixed through hole; the inner side plate of the balance weight cover body is provided with a positioning through hole corresponding to the balance weight lifting hole in the balance weight connecting cavity, and the positioning through hole is used for installing a positioning bolt; The inner measuring plate and the outer side plate of the balance weight cover body are provided with array threaded through holes, and the array threaded through holes are provided with fine adjustment bolt groups for controlling the positions of the balance weight cover body.
10. The automatic crank balance adjusting device of the pumping unit according to claim 8, wherein a left rib plate and a right rib plate are welded on the inner wall of the inner side plate or the outer side plate, a left vibration reduction plate is adhered to the upper surface of the left rib plate, and a right vibration reduction plate is adhered to the upper surface of the right rib plate; The left rib plate is located right below the first lower fixing plate, the first lower fixing plate is overlapped on the left vibration reduction plate, the right rib plate is located right below the second lower fixing plate, and the second lower fixing plate is overlapped on the right vibration reduction plate.
11. The automatic crank balance adjustment device of the pumping unit according to claim 7, further comprising a control system, wherein the control system comprises a control box, a laser range finder group and an annular load sensor group; The control box is connected with the balance weight cover body, the control box and the balance weight cover body are both provided with hoisting pieces, and a power supply module, a programmable intelligent controller, a communication module and a motor driver group are arranged in the control box; The power supply module is connected with the programmable intelligent controller, the communication module and the motor driver group through the power line group, the programmable intelligent controller is connected with the laser range finder group, the annular load sensor group, the communication module and the motor driver group through the communication line group, and the motor driver group is connected with the left motor, the right motor and the inner motor; the control box is also connected with a photovoltaic panel, and the photovoltaic panel is electrically connected with the power supply module.
12. The automatic balance adjustment device for the crank of the pumping unit according to claim 11, wherein the laser range finder group comprises an outer laser range finder, a left laser range finder and a right laser range finder, wherein the outer laser range finder is arranged on the outer wall of the right sealing cover, the left laser range finder is arranged at the right end of the first middle fixing plate, and the right laser range finder is arranged at the left end of the second middle fixing plate; the external laser range finder is used for detecting the limit target distance of the head end of the crank; the left laser range finder is used for detecting a left balance block fixing bolt; the right laser range finder is used for detecting a right balance block fixing bolt; The annular load sensor group comprises a left annular load sensor and a right annular load sensor, wherein the left annular load sensor is arranged between a left gear nut and a balance weight; The limiting target comprises a T-shaped seat bolt, a target nut and a pressing plate, wherein the T-shaped seat bolt is used for being installed in a crank T-shaped groove at the head end of a crank, the target nut and the pressing plate are sleeved on the T-shaped seat bolt, and the target nut is used for tightly fixing the pressing plate at the head end of the crank and locking the T-shaped seat bolt.
13. The pumping unit provided with the automatic crank balance adjusting device of the pumping unit comprises a crank and a balance block, wherein the balance block is connected with the crank through a fixed bolt, and the crank is provided with a rack; the left driven nut is connected with the left balance block fixing bolt, the right driven nut is connected with the right balance block fixing bolt, the driving shaft is rotationally connected with the balance block, and the driving gear is meshed with the rack.
14. A method of using a pumping unit with an automatic crank balance adjustment device for the pumping unit, characterized in that the pumping unit of claim 13 is used, comprising the steps of: b1, installing an automatic balance adjusting device of the crank of the pumping unit on balance blocks on two sides of the crank of the pumping unit; B2, stopping the crank of the pumping unit at a horizontal position, enabling the balance weight to be upward, tightening and braking, pulling the brake, powering off, and inputting an adjustment distance by an operator; The programmable intelligent controller controls the left motor and the right motor to loosen the left gear nut and the right gear nut, the left balance block fixing bolt and the right balance block fixing bolt descend and do not shade laser of the left laser range finder and the right laser range finder any more, and the programmable intelligent controller controls the left motor and the right motor to stop rotating; the programmable intelligent controller controls the inner motor to rotate, the outer laser distance meter transmits the moving distance of the balance weight in real time to reach the target distance, and the programmable intelligent controller controls the inner motor to stop rotating; The programmable intelligent controller controls the left motor and the right motor to fasten the left gear nut and the right gear nut, load data of the left annular load sensor and the right annular load sensor reach set values, and the left motor and the right motor stop rotating; And B3, adjusting another balance weight by the same method, cleaning the site, closing the power transmission, and starting the pumping unit.

Description

Automatic crank balance adjusting device for pumping unit, pumping unit and method Technical Field The invention relates to the technical field of balance tools of pumping units, in particular to an automatic crank balance adjusting device of a pumping unit, the pumping unit and a method. Background The oil extraction worker on site adopts a hand tool to adjust the crank balance, 4 people are required to carry out 1 hour, the ascending operation is safe, the risk is high, and the ascending operation is assisted by mechanical equipment such as a lifter, a crane and the like, so that the cost expenditure is high. The publication number is CN217873203U, which discloses a remote control adjusting device for a balance weight of a beam pumping unit, wherein a motor is connected with a worm gear reduction motor, a power screw is arranged in a fixed plate in a base shell, the front end of the power screw is connected with the output end of the worm gear reduction motor through a coupler, a follow-up slide seat connected on the power screw and slide rails are arranged on two sides of the power slide seat, the worm gear reduction motor can drive the power slide seat and the follow-up slide seat to move in a slide way in the base shell through the power screw, the lower end surface of the base is provided with base anti-slip teeth which are meshed with crank anti-slip teeth, the balance weight is fixed on the follow-up slide seat and the power slide seat, and the remote control adjusting device for the balance weight is arranged between a crank and the balance weight on two sides of the pumping unit. This prior art has increased between balancing piece and crank and has removed the seat, and adjustable distance is dependent on removing seat length, need remove the group when can not satisfying the needs, does not solve the problem that needs workman operated. The automatic balance adjusting device for the crank of the beam pumping unit is disclosed in the publication No. CN105134139A, a balance block arranged on the crank can linearly move on the crank along with the rotation of a ball screw, so that the position of the balance block on the crank is changed to enable the pumping unit to reach a balance state again, a motor capable of rotating forward and backward is fixedly arranged on a boss, a pinion is directly arranged on a motor shaft, a large gear is directly arranged on the shaft end of the ball screw, the ball screw is fixedly arranged on the crank through a left supporting seat and a right supporting seat, the balance block is arranged in a guide rail groove and is connected with the crank, and the rotation of the motor is converted into the linear movement of the balance block on the crank through the rotation of the ball screw through gear transmission. This prior art utilizes screw drive, needs to reform transform current balancing piece, and the cost expenditure is big, and the tight automation problem of unloading of fixed bolt to the balancing piece does not relate to, leads to being difficult to popularizing and applying on the beam-pumping unit of putting into production. The publication number is CN118346233A, which discloses a crank phase angle and stroke stepless regulating device of a beam pumping unit, comprising a crank shaft, a balance block, an arc groove, a screw rod connecting rod mechanism and a screw rod transmission mechanism, wherein the middle part of the crank shaft is provided with a regulating window, the regulating window is provided with a sliding guide rail, two ends of the arc groove are in sliding connection with the sliding guide rail, a moving block in the screw rod connecting rod mechanism is fixedly connected with the arc groove, the arc groove is internally provided with the arc guide rail, a connecting rod locking block consists of a locking block shaft which vertically fixes one end of the locking block, the locking block shaft penetrates through the arc guide rail to be connected with the connecting rod, the other end of the locking block penetrates out of an arc hole on the groove wall of the arc groove and stretches into between an upper shaft and a lower shaft of a nut transmission device, the nut transmission device consists of a nut block, the upper shaft and the lower shaft, and the nut block is in threaded connection with a screw rod of the screw rod transmission mechanism through a screw hole of the nut block. This prior art utilizes screw drive, needs to reform transform current crank, and the cost expenditure is big, and the tight automation problem of unloading of fixed bolt to the balancing piece does not relate to, leads to being difficult to popularize and apply on the beam-pumping unit of putting into production. In summary, the technical scheme of the above disclosed technology, the technical problems to be solved and the beneficial effects are different from those of the present invention, and the above disclosed technical documents have no technical tea