CN117432728B - Anti-falling motor reversing type pumping unit - Google Patents
Anti-falling motor reversing type pumping unit Download PDFInfo
- Publication number
- CN117432728B CN117432728B CN202311764071.4A CN202311764071A CN117432728B CN 117432728 B CN117432728 B CN 117432728B CN 202311764071 A CN202311764071 A CN 202311764071A CN 117432728 B CN117432728 B CN 117432728B
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- rod
- mirror image
- image distribution
- hydraulic
- support frame
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- 238000005086 pumping Methods 0.000 title claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims description 55
- 230000008878 coupling Effects 0.000 claims description 20
- 238000010168 coupling process Methods 0.000 claims description 20
- 238000005859 coupling reaction Methods 0.000 claims description 20
- 230000001360 synchronised effect Effects 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000003208 petroleum Substances 0.000 abstract description 2
- 239000010720 hydraulic oil Substances 0.000 description 18
- 230000009471 action Effects 0.000 description 14
- 238000000034 method Methods 0.000 description 8
- 239000003129 oil well Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000005484 gravity Effects 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
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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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed
- F16D59/02—Self-acting brakes, e.g. coming into operation at a predetermined speed spring-loaded and adapted to be released by mechanical, fluid, or electromagnetic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
- F16D63/002—Brakes with direct electrical or electro-magnetic actuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
- F16D63/006—Positive locking brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
- F16D63/008—Brakes acting on a linearly moving member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
- F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
- F16H19/06—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising flexible members, e.g. an endless flexible member
- F16H19/0672—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising flexible members, e.g. an endless flexible member characterised by means for tensioning the flexible member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H33/00—Gearings based on repeated accumulation and delivery of energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
- F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
- F16H19/06—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising flexible members, e.g. an endless flexible member
- F16H2019/0668—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising flexible members, e.g. an endless flexible member with open loop, e.g. with the free ends of the flexible member fixed to the casing, e.g. when the drive means are arranged on the carriage
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Electromagnetism (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The invention provides a falling-preventing motor reversing type pumping unit, and relates to the technical field of petroleum acquisition. Including the support frame, the support frame rotates to be connected with and is the fixed roller bearing that mirror image distributes, support frame sliding connection has the slip roller bearing, is the mirror image distribution fixed roller bearing with the slip roller bearing is jointly around being equipped with the belt that is the mirror image distribution, is the mirror image distribution the adjacent tip of belt all is provided with the anti-falling subassembly, the anti-falling subassembly is including the connecting piece, connecting piece sliding connection in be the mirror image distribution the adjacent one end of belt, sliding connection has the first spring stopper that is the mirror image distribution in the connecting piece, be provided with evenly distributed's spacing groove on the support frame. According to the invention, the anti-falling assembly is arranged to be matched with the belt, so that when the belt is broken, the first spring limiting block is pushed out to be matched with and limited by the adjacent limiting groove on the support frame, and further the first balancing weight and the sucker rod are limited, and the damage of the device caused by falling is prevented.
Description
Technical Field
The invention relates to the technical field of petroleum acquisition, in particular to a falling-preventing motor reversing type pumping unit.
Background
The oil pumping unit is a device for extracting crude oil in an underground oil reservoir, the belt oil pumping unit is a traditional type oil pumping unit, the belt transmission is generally used for driving the sucker rod in the oil well, so that the underground crude oil is extracted, the belt oil pumping unit has the characteristics of simple structure and strong adaptability, the belt is matched with the balancing weight through a single reversing motor to drive the sucker rod to move, the load of the reversing motor is greatly reduced, the whole efficiency is improved, the falling situation occurs due to the fault reasons in the operation process, the safety protection is mainly arranged around the existing belt oil pumping unit or the belt is braked emergently, the balancing weight and the sucker rod cannot be braked directly, the strength of the belt is reduced due to overlong service time, the phenomenon of separation, slipping or fracture easily occurs in the braking process, and when the belt is in the above-mentioned condition, the balancing weight and the sucker rod can lose pulling to fall, so that the balancing weight and the sucker rod are damaged, and the device cannot operate.
Disclosure of Invention
The invention provides a falling-preventing motor reversing type pumping unit, which aims to overcome the defect that a balancing weight and a pumping rod cannot be braked when a belt is separated, slipped or broken.
The technical scheme of the invention is as follows: the utility model provides a motor reversing type pumping unit prevents falling, includes the support frame, the support frame rotates and is connected with the fixed roller bearing that is mirror image distribution, support frame sliding connection has the slip roller bearing with the rigid coupling has the spring between the support frame, be mirror image distribution the fixed roller bearing with the slip roller bearing is jointly around being equipped with the belt that is mirror image distribution, is mirror image distribution the adjacent tip of belt all is provided with the anti-falling subassembly, the anti-falling subassembly is including the connecting piece, connecting piece sliding connection is in adjacent be mirror image distribution the tip of belt, the rigid coupling has the first hydraulic stem that is mirror image distribution in the connecting piece, the flexible end of first hydraulic stem with adjacent the belt rigid coupling, the belt with adjacent be provided with the extension spring between the first hydraulic stem, the rigid coupling has with adjacent the second hydraulic stem that first hydraulic stem communicates, the flexible end rigid coupling of second hydraulic stem has the trigger plate, sliding connection has the first spring stopper that is mirror image distribution, first spring stopper and adjacent trigger plate are in adjacent be mirror image distribution in the end portion of belt, the flexible end portion of first hydraulic stem and adjacent hydraulic stem have the first recess and the same, the support frame is provided with the first recess in the same as the support frame, the fixed carrier has the fixed carrier, the fixed carrier has the first recess.
In addition, as a further preference, a limiting surface is arranged on one side of the first spring limiting block, which is close to the adjacent second hydraulic rod, and the limiting surface on the first spring limiting block is composed of a vertical surface and an inclined surface which is gradually far away from the adjacent second hydraulic rod and is inclined upwards, and the vertical surface of the limiting surface of the second hydraulic rod is used for preventing the adjacent first spring limiting block from resetting.
In addition, as a further preference, the transmission assembly comprises a reversing motor, the reversing motor is fixedly connected in the fixing frame, a first speed changing shaft is fixedly connected to an output shaft of the reversing motor, a second speed changing shaft is rotatably connected to the fixing frame, a steel belt is wound between the first speed changing shaft and the second speed changing shaft, a gear is arranged on one side, close to the fixed roller, of the second speed changing shaft, a transmission shaft is slidably connected to one side, close to the first balancing weight, of the fixed roller, close to the second speed changing shaft, a toothed ring is arranged on the transmission shaft, a spring is arranged between the transmission shaft and the adjacent fixed roller, and the toothed ring on the transmission shaft is meshed with the gear on the second speed changing shaft.
In addition, as further preferred, still including set up in speed change assembly on the support frame, speed change assembly is used for according to being mirror image distribution the elasticity of belt is adjusted fixed roller's rotational speed, speed change assembly is including the locating rack, locating rack sliding connection in the support frame, the locating rack with the slip roller rotates to be connected, the rigid coupling has the second balancing weight on the locating rack, the locating rack is kept away from one side rigid coupling of slip roller has first synchronizing lever, the support frame is close to be fixed with in one side of first synchronizing lever and is mirror image distribution's first pneumatic cylinder, is mirror image distribution all sliding connection has first telescopic link in the first pneumatic cylinder, is mirror image distribution first telescopic link all with first synchronizing lever sliding connection, the rigid coupling has the second pneumatic cylinder that is mirror image distribution on the mount, is mirror image distribution first pneumatic cylinder all with be mirror image distribution's intercommunication of second pneumatic cylinder, be distributed second pneumatic link all sliding connection has the second transmission shaft, is kept away from with one side of first telescopic link and second telescopic link rotate the telescopic link.
In addition, as a further preference, the mass of the second balancing weight is equal to that of the sucker rod, and the elastic coefficient of springs at two sides of the sliding connection part of the sliding roller and the supporting frame is the same.
In addition, as a further preference, a tension spring is arranged between the first telescopic rod and the first synchronous rod, and the length of the sliding connection part of the first telescopic rod and the first synchronous rod is greater than the sum of the length of the tension spring between the first telescopic rod and the first synchronous rod and the length of the first hydraulic cylinder.
In addition, as further preferred, still including set up in break away from the subassembly in the support frame, break away from the subassembly be used for making be close to one side of the first balancing weight fixed roller is stopped rotating, break away from the subassembly including be mirror image distribution's third hydraulic stem, be mirror image distribution the third hydraulic stem all rigid coupling in the support frame, be mirror image distribution the third hydraulic stem all with the spacing cooperation, be provided with reset spring between the flexible portion of third hydraulic stem and its fixed part, be provided with the fourth hydraulic stem on the mount, the flexible end of fourth hydraulic stem with the transmission shaft rotates to be connected, the fourth hydraulic stem with be mirror image distribution the third hydraulic stem all communicates.
In addition, as a further preference, the transmission shaft is kept away from one side rigid coupling of fourth hydraulic stem has the second synchronizing bar, the second synchronizing bar with be close to one side of the first balancing weight fixed roller sliding connection, be close to one side of the first balancing weight fixed roller keeps away from one end sliding connection of transmission shaft has circumference evenly distributed's second spring stopper, circumference evenly distributed the second spring stopper all with the second synchronizing bar is kept away from one end cooperation of transmission shaft, be provided with evenly distributed's brake groove on the support frame, circumference evenly distributed the second spring stopper respectively with adjacent brake groove spacing cooperation on the support frame.
In addition, as further preferred, still including set up in spacing subassembly in the support frame, spacing subassembly be used for with first balancing weight with the sucker rod carries out spacingly, spacing subassembly is including being mirror image distribution's contact sensor, is mirror image distribution contact sensor all rigid coupling in the support frame, contact sensor with spacing cooperation, equal sliding connection has the trigger lever that is mirror image distribution in the connecting piece, the trigger lever with adjacent first spring stopper rigid coupling is the rigid coupling has the extension spring between the trigger lever that is mirror image distribution, the rigid coupling has the electro-magnet that is mirror image distribution in the connecting piece, electro-magnet and adjacent trigger lever sliding fit.
Further preferably, an end of the trigger rod, which is close to the adjacent second hydraulic rod, is attracted by a magnet, and a sliding connection part of the trigger rod and the adjacent electromagnet is not attracted by the magnet.
The beneficial effects of the invention are as follows: according to the invention, the anti-falling assembly is arranged to be matched with the belt, so that when the belt is broken, the first spring limiting block is pushed out to be matched with and limited by the adjacent limiting groove on the support frame, and further the first balancing weight and the sucker rod are limited, so that the damage of the device caused by falling is prevented; the limiting surface on the first spring limiting block is matched with the trigger plate, so that the situation that the first balancing weight and the sucker rod cannot be limited due to overlarge reverse acting force of the first spring limiting block is prevented; by arranging the speed changing component, the tension of the belt on the sliding roller is in direct proportion to the moving speed of the belt so as to keep the tightness of the belt and prevent the belt from being excessively loosened or tightened, thereby further causing the abrasion or detachment of the belt; by arranging the disengaging assembly, when the sucker rod is blocked in the process of lowering or withdrawing, the belt stops moving, so that the belt is prevented from being excessively loosened or excessively tightened to cause abrasion and fracture; through setting up spacing subassembly, make first balancing weight and sucker rod when taking place unusual card to die spacing with the support frame, prevent that first balancing weight and sucker rod from falling and causing the device to damage.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a cross-sectional view of a three-dimensional structure of the present invention;
FIG. 3 is a perspective view in cross section of the fall arrest assembly of the present invention;
FIG. 4 is a perspective view of a cross-section of the anti-fall assembly and spacing assembly of the present invention;
FIG. 5 is a partial perspective sectional view of the transmission assembly of the present invention;
FIG. 6 is a rear perspective cross-sectional view of the transmission assembly of the present invention;
FIG. 7 is a partial perspective view of the shift assembly of the present invention;
FIG. 8 is a perspective view of a first synchronizing bar and a first telescoping bar according to the present invention;
FIG. 9 is a cross-sectional view of a second hydraulic cylinder according to the present invention;
fig. 10 is a perspective view in cross section of a release assembly according to the present invention.
In the accompanying drawings: 1: support frame, 2: control module, 3: fixed roller, 301: sliding roller, 4: belt, 5: fall arrest assembly, 501: connecting piece, 502: first hydraulic lever, 503: second hydraulic lever, 504: trigger plate, 505: first spring stopper, 6: first balancing weight, 7: sucker rod, 8: fixing frame, 9: transmission assembly, 901: commutating motor, 902: first shift shaft, 903: second shift shaft, 904: transmission shaft, 10: shift assembly, 1001: limit frame, 1002: second balancing weight, 1003: first synchronization bar, 1004: first hydraulic cylinder, 1005: first telescopic link, 1006: second hydraulic cylinder, 1007: second telescopic link, 11: disengaging assembly, 1101: third hydraulic lever, 1102: fourth hydraulic stem, 1103: second synchronizing bar, 1104: second spring stopper, 12: limit assembly, 1201: contact sensor, 1202: trigger lever, 1203: an electromagnet.
Detailed Description
The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which currently preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
An embodiment 1, as shown in fig. 1-7, a falling-preventing motor reversing type pumping unit, including a support frame 1, a control module 2 is fixedly connected to the front side of the support frame 1, a fixed roller 3 in mirror image distribution is rotationally connected to the upper side of the support frame 1, a sliding roller 301 is slidingly connected to the lower side of the support frame 1, springs are fixedly connected to the upper and lower sides of the sliding connection position of the sliding roller 301 and the support frame 1, the elastic coefficients of the springs on the upper and lower sides of the sliding roller 301 are equal, two belts 4 in mirror image distribution are wound around the fixed roller 3 and the sliding roller 301 together, the two belts 4 are used for increasing the distribution area of transmission force, sharing the transmission load, preventing damage to one of the belts 4, increasing safety, the falling-preventing components 5 are fixedly connected to the left and right ends of the belts 4 in mirror image distribution, the falling-preventing components 5 include a connecting piece 501, the right connecting piece 501 is connected with the right ends of the two belts 4 in a sliding way, the left connecting piece 501 is connected with the left ends of the two belts 4 in a sliding way, a first hydraulic rod 502 which is in mirror image distribution is fixedly connected in the connecting piece 501, hydraulic oil is filled in the first hydraulic rod 502, the telescopic end of the first hydraulic rod 502 is fixedly connected with the adjacent belts 4, a tension spring is arranged between the fixed parts of the belts 4 and the adjacent first hydraulic rods 502 and used for resetting when the belts 4 are disconnected, a second hydraulic rod 503 which is communicated with the adjacent first hydraulic rods 502 is fixedly connected in the connecting piece 501, a trigger plate 504 is fixedly connected at the telescopic end of the second hydraulic rod 503, a first spring limiting block 505 which is in mirror image distribution is connected in a sliding way in the connecting piece 501, one side of the first spring limiting block 505, which is close to the adjacent second hydraulic rod 503, is provided with a limiting surface, the limiting surface on the first spring limiting block 505 is composed of a vertical surface and an inclined surface which is gradually far away from the upward inclination of the adjacent second hydraulic rod 503, the first spring limiting block 505 is matched with the adjacent triggering plate 504, the vertical surface of the limiting surface on the first spring limiting block 505 is matched with the triggering plate 504, the first spring limiting block 505 is prevented from moving to reset towards the adjacent connecting piece 501, uniformly distributed limiting grooves are formed in the supporting frame 1, the limiting grooves on the supporting frame 1 are matched with the adjacent first spring limiting block 505, the two connecting pieces 501 are fixedly connected with the first balancing weight 6 and the sucker rod 7 respectively, reset generated when the belts 4 are disconnected is carried out, the first spring limiting blocks 505 on the front side and the rear side are driven to be matched with the limiting grooves on the supporting frame 1, the first balancing weight 6 and the sucker rod 7 are further enabled to be braked in a limiting mode, damage caused by falling of the first balancing weight 6 and the sucker rod 7 is prevented, a fixed frame 8 is fixedly connected to the supporting frame 1, a transmission assembly 9 is arranged in the fixed frame 8, the transmission assembly 9 is used for driving the fixed rolling shafts 3 on the right side to rotate, the two belts 4 are further driven to move, the two belts 4 are simultaneously driven to move, the sucker rod 7 on the left side and the first balancing weight 7 and the right side are driven to move up and down on the first balancing weight 6 through the two belts 4, the upper and the sucker rod 7 are driven by the belts 4, the reciprocating control assembly 2.
As shown in fig. 2, 5, 6 and 9, the transmission assembly 9 includes a reversing motor 901, the reversing motor 901 is electrically connected with the control module 2, the reversing motor 901 is fixedly connected in the front side of the fixing frame 8, an output shaft of the reversing motor 901 is fixedly connected with a first speed changing shaft 902, the front side of the fixing frame 8 is rotatably connected with a second speed changing shaft 903, a steel belt is wound between the first speed changing shaft 902 and the second speed changing shaft 903, a gear is arranged on the rear side of the second speed changing shaft 903, a transmission shaft 904 is slidingly connected with the front side of the fixed roller 3 on the right side, a toothed ring is arranged on the transmission shaft 904, a spring is arranged between the transmission shaft 904 and the adjacent fixed roller 3, the toothed ring on the transmission shaft 904 is meshed with the gear on the second speed changing shaft 903, and the fixed roller 3 on the right side is driven to rotate by the cooperation of the first speed changing shaft 902 and the second speed changing shaft 903, so that the two belts 4 are further moved.
When a user uses the device, the user firstly starts the reversing motor 901 through the control module 2, the output shaft of the reversing motor 901 drives the first variable speed shaft 902 to rotate, the first variable speed shaft 902 drives the second variable speed shaft 903 to rotate through a steel belt, the second variable speed shaft 903 drives the transmission shaft 904 to rotate through a gear, the transmission shaft 904 is kept at the front side of the right fixed roller 3 under the action of a spring, the transmission shaft 904 drives the right fixed roller 3 to rotate, the right fixed roller 3 drives the two belts 4 to move simultaneously, the right ends of the two belts 4 drive the right connecting piece 501 to move upwards, the right connecting piece 501 drives the first balancing weight 6 to move upwards, the left pumping rod 7 moves downwards under the action of gravity and enters the oil well, after the left pumping rod 7 is lowered to the limit position in the oil well, the user drives the right fixed roller 3 to reversely rotate through the output shaft of the control module 2, the right fixed roller 3 drives the two belts 4 to reversely move, the right first balancing weight 6 drives the two belts 4 to move upwards under the action of gravity, and the right first balancing weight 7 drives the first balancing weight 7 to move upwards away from the pumping rod 7 from the oil well.
In the oil pumping process of the device, in an initial state (in a connecting piece 501 shown in fig. 4), first spring limiting blocks 505 on the front side and the rear side are retracted into the connecting piece 501 under the action of springs, so that the first spring limiting blocks 505 are not matched with adjacent limiting grooves on the support frame 1, when one belt 4 breaks, the belt 4 releases the upward tension on the adjacent first hydraulic rods 502, the telescopic parts of the first hydraulic rods 502 retract downwards under the action of tension springs, hydraulic oil in the first hydraulic rods 502 flows into the second hydraulic rods 503, the telescopic ends of the second hydraulic rods 503 extend out, the telescopic ends of the second hydraulic rods 503 drive the trigger plates 504 to move downwards, the trigger plate 504 contacts with the inclined planes of the first spring limiting blocks 505 on the front side and the rear side and pushes the two adjacent first spring limiting blocks 505 to the front side and the rear side respectively, when the trigger plate 504 moves downwards to the vertical surface of the first spring limiting blocks 505, the first spring limiting blocks 505 on the front side and the rear side are matched with limiting grooves on the supporting frame 1 at the same time, the first spring limiting blocks 505 drive the connecting pieces 501 to be limited on the supporting frame 1, at the moment, a user controls the reversing motor 901 to stop through the control module 2, the left connecting piece 501 and the right connecting piece 501 simultaneously stop moving the first balancing weights 6 and the sucker rods 7, so that braking action on the first balancing weights 6 and the sucker rods 7 is achieved, the falling of the first balancing weights 6 and the sucker rods 7 caused by breakage of the belt 4 is prevented, and then the user replaces the broken belt 4.
After the user finishes replacing the corresponding broken belt 4, the telescopic end of the first hydraulic rod 502 is upwards stretched by the belt 4, the hydraulic oil in the second hydraulic rod 503 is sucked by the first hydraulic rod 502, the tension spring of the telescopic part of the first hydraulic rod 502 is stretched, the telescopic end of the second hydraulic rod 503 is retracted by reducing the hydraulic oil in the second hydraulic rod 503, the telescopic end of the second hydraulic rod 503 drives the trigger plate 504 to move upwards for resetting, the trigger plate 504 releases the contact with the first spring limiting blocks 505 adjacent to the front side and the rear side, the first spring limiting blocks 505 on the front side and the rear side retract and reset into the connecting piece 501 through the reset spring, the cooperation with the limiting grooves on the support frame 1 is released, meanwhile, the reversing motor 901 is controlled to start to drive the belt 4 to resume moving through the control module 2, and thus the falling prevention of the first balancing weight 6 and the sucker rod 7 is completed.
In embodiment 2, on the basis of embodiment 1, as shown in fig. 7-9, the device further comprises a speed changing assembly 10 disposed on the support frame 1, the speed changing assembly 10 is used for adjusting the rotation speed of the fixed roller 3 on the right side according to the tightness of the two belts 4, the speed changing assembly 10 comprises a limiting frame 1001, the limiting frame 1001 is slidably connected to the support frame 1, the limiting frame 1001 is rotatably connected with the sliding roller 301, a second balancing weight 1002 is fixedly connected to the limiting frame 1001, the mass of the second balancing weight 1002 is equal to the mass of the sucker rod 7, because the pulling force of the sucker rod 7 on the two belts 4 on the left side is the gravity of the sucker rod 7, the pulling force of the two belts 4 on the sliding roller 301 is equal to the gravity of the sucker rod 7, because the mass of the second balancing weight 1002 is equal to the mass of the sucker rod 7, the sliding roller 301 is kept in a middle balanced state at the sliding connection position of the sliding roller 301 and the support frame 1, the two belts 4 are kept in a tight state under the state of being stressed, a first synchronizing rod 1003 is fixedly connected with the front side of the limiting frame 1001, first hydraulic cylinders 1004 which are in mirror image distribution are fixedly connected in the side of the supporting frame 1, hydraulic oil is filled in the first hydraulic cylinders 1004 which are in mirror image distribution, first telescopic rods 1005 are slidably connected in the first hydraulic cylinders 1004 which are in mirror image distribution, the first telescopic rods 1005 which are in mirror image distribution are slidably connected with the first synchronizing rod 1003, tension springs are arranged between the first telescopic rods 1005 and the first synchronizing rod 1003, the length of the sliding connection part of the first telescopic rods 1005 and the first synchronizing rod 1003 is larger than the sum of the length of the tension springs between the first telescopic rods 1005 and the first synchronizing rod 1003 and the length of the first hydraulic cylinders 1004, second hydraulic cylinders 1006 which are in mirror image distribution are fixedly connected with the left side and the right side of the fixing frame 8, the first hydraulic cylinders 1004 which are in mirror image distribution are communicated with the second hydraulic cylinders 1006 which are in mirror image distribution, the second hydraulic cylinders 1006 which are in mirror image distribution are all connected with second telescopic rods 1007 in a sliding mode, the front ends of the left second telescopic rods 1007 are rotationally connected with the first variable speed shafts 902, the front ends of the right second telescopic rods 1007 are rotationally connected with the second variable speed shafts 903, the transmission ratio between the first variable speed shafts 902 and the second variable speed shafts 903 is changed through the extension and shortening of the two second telescopic rods 1007, the fixed rolling shafts 3 on the right are enabled to rotate and slow down through the reduction of the transmission ratio between the first variable speed shafts 902 and the second variable speed shafts 903, further the moving speed of the two belts 4 is slowed down, the phenomenon that when the sucker rod 7 falls down, rapid falling occurs and the two belts 4 are pulled, and when the sucker rod 7 is recovered, the tension of the two belts 4 pulling the sucker rod 7 is too high, so that the strength is reduced or even damaged due to the fact that the two belts 4 are stressed too much is caused.
In the process of lowering the sucker rod 7 into an oil well, in an initial state (shown in fig. 8), the sucker rod 7 keeps the sliding roller 301 in the middle of the sliding connection position of the sliding roller 301 and the support frame 1 under the action of the pulling force of the two belts 4 and the gravity of the second balancing weight 1002 on the sliding roller 301, and keeps the two belts 4 in a tight state, when the sucker rod 7 is abnormally slowed down, the fixed roller 3 continuously rotates to drive the two belts 4 to continuously move, the pulling force of the two belts 4 on the sliding roller 301 is reduced, the sliding roller 301 moves downwards under the action of the gravity of the second balancing weight 1002 and presses the spring on the lower side of the sliding roller 301, the limiting frame 1001 drives the first synchronizing rod 1003 to move downwards, the first synchronizing rod 1003 drives the first telescopic rod 1005 on the lower side to move downwards, the tension spring between the first telescopic rod 1005 on the upper side and the first synchronizing rod 1003 is stretched, hydraulic oil in the first telescopic rod 1005 on the lower side is continuously rotated to drive the left side and the right side 8 of the first telescopic rod 1004 to continuously move, the hydraulic oil in the first telescopic rod 1005 on the lower side is pulled down to the right side 8, the second telescopic rod 1006 is pulled down by the second synchronizing rod 1003 is prevented from moving downwards, and the second telescopic rod 4 is prevented from being pulled out by the second telescopic rod 4 or the second telescopic rod 4 is prevented from being pulled down, and the second telescopic rod 4 is prevented from being pulled down by the adjacent to rotate by the two belts to rotate.
After the sucker rod 7 passes through the abnormal lowering position, the sucker rod 7 restores the balance of the pulling force of the sliding roller 301 through the pulling force of the belt 4, the sliding roller 301 restores the initial position upwards through the spring, so that the hydraulic oil in the two second hydraulic cylinders 1006 flows back into the first hydraulic cylinder 1004 at the lower side, the hydraulic oil in the two second hydraulic cylinders 1006 reduces to retract the adjacent second telescopic rod 1007, the transmission ratio of the first speed changing shaft 902 and the second speed changing shaft 903 is restored, and the rotation speed of the fixed roller 3 is restored.
In the process of withdrawing the sucker rod 7 from the oil well, when the sucker rod 7 is abnormally slowed down, the fixed roller 3 continues to rotate to enable the tension of the belt 4 on the sliding roller 301 to be increased, the sliding roller 301 is driven by the belt 4 to move upwards and extrude the spring on the upper side of the sliding roller 301, the sliding roller 301 moves upwards to enable hydraulic oil in the first hydraulic cylinder 1004 on the upper side to flow into the two second hydraulic cylinders 1006, the transmission ratio of the first variable speed shaft 902 and the second variable speed shaft 903 is reduced due to the increase of the hydraulic oil in the two second hydraulic cylinders 1006, the moving speed of the belt 4 is further slowed down, the tension born by the sucker rod 7 when the belt 4 pulls the sucker rod 4 is avoided, abrasion of the belt 4 under the action of high tension is reduced, the service life of the belt 4 is prolonged, after the sucker rod 7 is withdrawn at the abnormal position, the tension of the sucker rod 7 on the sliding roller 301 is balanced through the tension of the belt 4, the hydraulic oil in the two second hydraulic cylinders 1006 flows back into the first hydraulic cylinders 1004 on the upper side, and the rotating speed of the fixed roller 3 on the right side is further restored.
In embodiment 3, on the basis of embodiment 2, as shown in fig. 8 and 10, the device further comprises a disengaging assembly 11 disposed in the support frame 1, the disengaging assembly 11 is used for stopping rotation of the fixed roller 3 on the right side, the disengaging assembly 11 comprises a third hydraulic rod 1101 in mirror image distribution, hydraulic oil is filled in the third hydraulic rod 1101, the third hydraulic rod 1101 in mirror image distribution is fixedly connected to the upper side and the lower side of a limit frame 1001 in the support frame 1 respectively, the third hydraulic rod 1101 in mirror image distribution is matched with the limit frame 1001, a return spring is disposed between a telescopic part of the third hydraulic rod 1101 and a fixing part of the third hydraulic rod, a fourth hydraulic rod 1102 is disposed on the fixing frame 8, a telescopic end of the fourth hydraulic rod 1102 is in rotary connection with the transmission shaft 904, the fourth hydraulic rod 1102 is communicated with the third hydraulic rod 1101 in mirror image distribution, and a toothed ring on the transmission shaft 904 is driven to be disengaged from gears on the second speed change shaft 903 through the cooperation of the limit frame 1001, and thus the fixed roller 3 on the right side is stopped from rotating by power source.
As shown in fig. 10, a second synchronization rod 1103 is fixedly connected to the rear side of the transmission shaft 904, the second synchronization rod 1103 is slidably connected with a fixed roller 3 on the right side, three second spring limiting blocks 1104 uniformly distributed in the circumferential direction are slidably connected to the rear side of the fixed roller 3 on the right side, the second spring limiting blocks 1104 uniformly distributed in the circumferential direction are matched with the rear end of the second synchronization rod 1103, the rear contact sides of the second spring limiting blocks 1104 and the rear end of the second synchronization rod 1103 are inclined planes gradually far away from the second synchronization rod 1103 and inclining forward, uniformly distributed braking grooves are formed in the support frame 1, the second spring limiting blocks 1104 uniformly distributed in the circumferential direction are respectively in limit fit with adjacent braking grooves in the support frame 1, the second synchronization rod 1103 is driven to move by the transmission shaft 904, the second spring limiting blocks 1104 uniformly distributed in the circumferential direction are matched with the adjacent braking grooves in the support frame 1, further, the fixed roller 3 on the right side is braked and prevented from being excessively loose or excessively tight, and the service life of the belt 4 is prolonged.
As shown in fig. 4 and 8, the device further comprises a limiting component 12 arranged in the supporting frame 1, the limiting component 12 is used for triggering the first balancing weight 6 and the sucker rod 7 to limit when the belt 4 is too loose or too tight, the limiting component 12 comprises contact sensors 1201 distributed in a mirror image mode, the contact sensors 1201 distributed in a mirror image mode are electrically connected with the control module 2, the contact sensors 1201 distributed in a mirror image mode are fixedly connected to the upper side and the lower side of a limiting frame 1001 in the supporting frame 1 respectively, the contact sensors 1201 are matched with the limiting frame 1001, when the limit frame 1001 moves to be in contact with any one of the contact sensors 1201, the contact sensor 1201 turns off the control reversing motor 901 through the control module 2 and energizes the four electromagnets 1203, the trigger rods 1202 distributed in mirror image are connected in the connecting piece 501 in a sliding way, the trigger rods 1202 are fixedly connected with the adjacent first spring limit blocks 505, the adjacent trigger rods 1202 are driven to move by energizing the electromagnets 1203, and further drives the adjacent first spring limiting blocks 505 to move, tension springs are fixedly connected between the triggering rods 1202 in mirror image distribution, electromagnets 1203 in mirror image distribution are fixedly connected in the connecting piece 501, the electromagnets 1203 in mirror image distribution are electrically connected with the control module 2, one end of the triggering rod 1202 close to the adjacent second hydraulic rod 503 can be attracted by the magnets, the sliding connection part of the triggering rod 1202 and the adjacent electromagnets 1203 can not be attracted by the magnets, the electromagnet 1203 is electrified to attract one end of the trigger rod 1202 close to the adjacent second hydraulic rod 503, so that the trigger rod 1202 drives the adjacent first spring limiting block 505 to move to be matched with the limiting groove on the support frame 1, braking limiting of the first balancing weight 6 and the sucker rod 7 is realized, and the first balancing weight 6 and the sucker rod 7 are prevented from falling when the belt 4 is excessively loosened or tightened to cause breakage or slipping.
When the pumping rod 7 is in a blocking abnormality in the process of being lowered into an oil well, the pumping rod 7 reduces the pulling force of the pumping rod 7 on the sliding roller 301 through the belt 4, so that the sliding roller 301 drives the limiting frame 1001 to move downwards under the action of the gravity of the second balancing weight 1002, when the limiting frame 1001 moves downwards to a limiting position, the limiting frame contacts with the telescopic ends of the third hydraulic rod 1101 on the lower side and pushes the telescopic ends of the third hydraulic rod 1101 downwards, springs on the third hydraulic rod 1101 are extruded, meanwhile hydraulic oil in the third hydraulic rod 1101 flows into the fourth hydraulic rod 1102, the telescopic ends of the fourth hydraulic rod 1102 are extended by the hydraulic oil in the fourth hydraulic rod 1102, the telescopic ends of the fourth hydraulic rod 1102 drive the transmission shaft 904 to move backwards, a toothed ring on the transmission shaft 904 is in meshing engagement with gears on the second speed changing shaft 903, the transmission shaft 904 drives the second synchronous rod 1103 to move backwards, the rear end of the second synchronous rod 1103 contacts with and pushes three second spring limiting blocks 1104 which are uniformly distributed circumferentially, the three second spring limiting blocks 1104 simultaneously extend out of the fixed roller 3, the telescopic ends of the second hydraulic rod 1101 extend out of the fixed roller 3, the second limiting blocks are matched with adjacent supporting frames 1, and the belt 4 is prevented from being released, and the belt 4 is prevented from being rotated, and the belt 4 is prevented from being further extended.
When the limiting frame 1001 moves downwards to the limit position, the limiting frame 1001 is in contact with the contact sensor 1201 at the lower side, the contact sensor 1201 transmits an electric signal generated after contact to the control module 2, the control module 2 controls the electromagnet 1203 to be electrified and generate electromagnetic attraction force, meanwhile, the reversing motor 901 is controlled to stop rotating, the electromagnet 1203 attracts one end, close to the adjacent second hydraulic rod 503, of the adjacent triggering rod 1202, the triggering rod 1202 at the front side and the rear side respectively drives the adjacent first spring limiting block 505 to extend out of the connecting piece 501, springs between the triggering rods 1202 at the front side and the rear side are stretched, the springs of the first spring limiting blocks 505 are extruded, the first spring limiting blocks 505 at the front side and the rear side are respectively matched with adjacent limiting grooves on the supporting frame 1, the first balancing weights 6 and the sucker rods 7 are braked and limited simultaneously, and the first balancing weights 6 and the sucker rods 7 are prevented from falling when the fixed rolling shafts 3 stop rotating.
After the abnormal handling of the sucker rod 7 after the user puts down and blocks is completed, the sucker rod 7 restores the balance to the pulling force of the sliding roller 301 through the pulling force of the belt 4, the sliding roller 301 restores the initial position upwards through the spring, the telescopic end of the third hydraulic rod 1101 returns upwards under the action of the spring, hydraulic oil in the fourth hydraulic rod 1102 flows back into the third hydraulic rod 1101, hydraulic oil in the fourth hydraulic rod 1102 reduces to enable the telescopic end of the fourth hydraulic rod 1102 to shrink, the telescopic end of the fourth hydraulic rod 1102 drives the transmission shaft 904 to move forwards, the toothed ring on the transmission shaft 904 is restored to be meshed with the gear on the second gear shift shaft 903, the transmission shaft 904 drives the second synchronous rod 1103 to move forwards, the second synchronous rod 1103 moves forwards to release the contact to the second spring limiting block 1104, the second spring limiting block 1104 moves in the fixed roller 3 to the right under the action of the spring, the second spring limiting block 1104 releases the cooperation with the braking groove on the support frame 1, further enables the fixed roller 3 to resume rotation, the sliding roller 301 drives the limiting frame to move upwards to release the contact with the contact sensor, the control module 2 controls the motor to rotate, the transmission shaft 904 moves forwards, simultaneously, the meshing with the gear ring on the second shifting rod 903 is restored to the second shifting rod 903, the contact with the gear on the second shifting rod is triggered, the electromagnet is released from the electromagnet is triggered, the attractive force 1202 is released from the electromagnet is released from the attractive force of the adjacent electromagnet 1202, and the electromagnet is released from the attractive force to the electromagnet 1202, and the attractive force is released from the electromagnet is triggered, and the attractive force is released from the attractive force is applied to the attractive force is 7, and has.
When the sucker rod 7 is in a blocking abnormality in the process of withdrawing from the oil well, the tension of the belt 4 to the sliding roller 301 is increased, the sliding roller 301 moves upwards under the action force of upward pulling of the belt 4, when the sliding roller 301 moves upwards to a limiting position, the sliding roller is contacted with the telescopic end of the upper third hydraulic rod 1101 and pushes the telescopic end of the third hydraulic rod 1101 upwards, hydraulic oil in the upper third hydraulic rod 1101 flows into the fourth hydraulic rod 1102, the toothed ring on the transmission shaft 904 is disengaged from the gear on the second variable speed shaft 903, at the moment, the fixed roller 3 stops rotating, the second spring limiting block 1104 is matched with the braking groove on the support frame 1, the belt 4 is prevented from being broken or slipped due to excessive tension, the service life of the belt 4 is prolonged, at the moment, the limiting frame 1001 is contacted with the upper contact sensor 1201, the first balancing weight 6 and the sucker rod 7 are limited on the support frame 1, the belt 4 is prevented from being broken and falling due to falling, and at the same time, the contact sensor 1201 transmits an electric signal to the control module 2 to control the reversing motor 901, and the load of the motor 901 is prevented from being changed to the motor.
After the abnormal handling of the pumping rod 7 after the user is pumped back and blocked by the pumping rod is completed, the pulling force of the belt 4 is balanced to the pulling force of the sliding roller 301, the sliding roller 301 and the limiting frame 1001 are restored to the initial positions under the action of the springs, the fixed roller 3 is enabled to resume rotation, and meanwhile the control module 2 is enabled to control the reversing motor 901 to resume rotation and release the braking limit of the first balancing weight 6 and the pumping rod 7.
While the invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.
Claims (10)
1. The utility model provides a motor reversing type pumping unit prevents falling, including support frame (1), support frame (1) rotate and are connected with fixed roller (3) that are mirror image distribution, support frame (1) sliding connection has slip roller (301), slip roller (301) with the rigid coupling has the spring between support frame (1), is mirror image distribution fixed roller (3) with slip roller (301) are jointly around being equipped with belt (4) that are mirror image distribution, characterized by: the anti-falling device comprises two anti-falling components (5), wherein the two anti-falling components (5) are respectively arranged at the adjacent ends of the belt (4) which are in mirror image distribution, the anti-falling components (5) comprise a connecting piece (501), the connecting piece (501) is connected with the adjacent ends of the belt (4) in a sliding manner, a first spring limiting block (505) which is in mirror image distribution is fixedly connected in the connecting piece (501), the telescopic end of the first hydraulic block (502) is fixedly connected with the adjacent belt (4), a tension spring is arranged between the belt (4) and the adjacent first hydraulic block (502), a second hydraulic block (503) which is communicated with the adjacent first hydraulic block (502) is fixedly connected in the connecting piece (501), a trigger plate (504) is fixedly connected with the telescopic end of the second hydraulic block (503), a first spring limiting block (505) which is in mirror image distribution is fixedly connected in the connecting piece (501), the first spring limiting block (505) is matched with the trigger plate (504) and the adjacent support frame (1), a fixed frame (7) is fixedly connected with the first supporting frame (1), a fixed frame (7) and a fixed frame (7) is fixedly connected with the second hydraulic block (5), a transmission assembly (9) is arranged in the fixing frame (8).
2. A drop-resistant motor-commutated pumping unit according to claim 1, wherein: the limiting surface is arranged on one side, close to the second hydraulic rod (503), of the first spring limiting block (505), the limiting surface on the first spring limiting block (505) is composed of a vertical surface and an inclined surface gradually far away from the second hydraulic rod (503) and inclined upwards, and the vertical surface of the limiting surface of the second hydraulic rod (503) is used for preventing the adjacent first spring limiting block (505) from resetting.
3. A drop-resistant motor-commutated pumping unit according to claim 1, wherein: the transmission assembly (9) comprises a reversing motor (901), the reversing motor (901) is fixedly connected in the fixing frame (8), a first speed changing shaft (902) is fixedly connected to an output shaft of the reversing motor (901), a second speed changing shaft (903) is rotatably connected to the fixing frame (8), a steel belt is wound between the first speed changing shaft (902) and the second speed changing shaft (903), a gear is arranged on one side, close to the fixed roller (3), of the second speed changing shaft (903), a transmission shaft (904) is connected to one side, close to the fixed roller (3) on one side of the first balancing weight (6), of the second speed changing shaft (903) in a sliding mode, a toothed ring is arranged on the transmission shaft (904), a spring is arranged between the transmission shaft (904) and the adjacent fixed roller (3), and the toothed ring on the transmission shaft (904) is meshed with the gear on the second speed changing shaft (903).
4. A drop-resistant motor-commutated pumping unit according to claim 3, wherein: the speed change assembly (10) is arranged on the support frame (1), the speed change assembly (10) is used for adjusting the rotation speed of the fixed roller (3) according to the tightness of the belt (4) which is in mirror image distribution, the speed change assembly (10) comprises a limit frame (1001), the limit frame (1001) is in sliding connection with the support frame (1), the limit frame (1001) is in sliding connection with the sliding roller (301), a second balancing weight (1002) is fixedly connected on the limit frame (1001), a first synchronous rod (1003) is fixedly connected on one side of the limit frame (1001) which is far away from the sliding roller (301), a first hydraulic cylinder (1004) which is in mirror image distribution is fixedly connected in one side of the support frame (1) which is close to the first synchronous rod (1003), a first telescopic rod (1005) which is in mirror image distribution is uniformly connected in the first hydraulic cylinder (1004), the first telescopic rod (1005) which is in mirror image distribution is uniformly connected with the first synchronous rod (1003) in sliding connection, the second telescopic rod (1006) which is in mirror image distribution is uniformly connected with the first hydraulic cylinder (1006) which is in mirror image distribution, the second telescopic rod (1007) far away from the transmission shaft (904) is rotatably connected with the first speed changing shaft (902), and the second telescopic rod (1007) near to the transmission shaft (904) is rotatably connected with the second speed changing shaft (903).
5. The drop-resistant motor-commutated pumping unit of claim 4, wherein: the mass of the second balancing weight (1002) is equal to that of the sucker rod (7), and the elastic coefficients of springs at two sides of the sliding connection position of the sliding roller (301) and the supporting frame (1) are the same.
6. The drop-resistant motor-commutated pumping unit of claim 4, wherein: tension springs are arranged between the first telescopic rod (1005) and the first synchronous rod (1003), and the length of the sliding connection part of the first telescopic rod (1005) and the first synchronous rod (1003) is larger than the sum of the length of the tension springs between the first telescopic rod (1005) and the first synchronous rod (1003) and the length of the first hydraulic cylinder (1004).
7. The drop-resistant motor-commutated pumping unit of claim 4, wherein: the novel hydraulic lifting device is characterized by further comprising a separation assembly (11) arranged in the supporting frame (1), wherein the separation assembly (11) is used for enabling a fixed roller (3) on one side of the first balancing weight (6) to stop rotating, the separation assembly (11) comprises a third hydraulic rod (1101) in mirror image distribution, the third hydraulic rod (1101) in mirror image distribution is fixedly connected in the supporting frame (1), the third hydraulic rod (1101) in mirror image distribution is matched with the limiting frame (1001), a reset spring is arranged between a telescopic part of the third hydraulic rod (1101) and a fixed part of the telescopic part of the third hydraulic rod, a fourth hydraulic rod (1102) is arranged on the fixed frame (8), a telescopic end of the fourth hydraulic rod (1102) is in rotary connection with the transmission shaft (904), and the fourth hydraulic rod (1102) is in mirror image distribution and is communicated with the third hydraulic rod (1101).
8. A drop-resistant motor-commutated pumping unit according to claim 7, wherein: one side rigid coupling that transmission shaft (904) was kept away from fourth hydraulic stem (1102) has second synchronizing lever (1103), second synchronizing lever (1103) with be close to fixed roller (3) sliding connection of first balancing weight (6) one side, be close to fixed roller (3) one side of first balancing weight (6) keep away from one end sliding connection of transmission shaft (904) has second spring stopper (1104) of circumference evenly distributed, circumference evenly distributed second spring stopper (1104) all with one end cooperation that transmission shaft (904) was kept away from to second synchronizing lever (1103), be provided with evenly distributed's brake groove on support frame (1), circumference evenly distributed second spring stopper (1104) respectively with adjacent brake groove spacing cooperation on support frame (1).
9. A drop-resistant motor-commutated pumping unit according to claim 8, wherein: still including set up in spacing subassembly (12) in support frame (1), spacing subassembly (12) be used for with first balancing weight (6) with sucker rod (7) are spacing, spacing subassembly (12) are including being mirror image distribution's contact sensor (1201), be mirror image distribution contact sensor (1201) all rigid coupling in support frame (1), contact sensor (1201) with spacing (1001) cooperation, equal sliding connection has trigger lever (1202) that are mirror image distribution in connecting piece (501), trigger lever (1202) and adjacent first spring stopper (505) rigid coupling is mirror image distribution between trigger lever (1202) rigid coupling has the extension spring, rigid coupling has electromagnet (1203) that are mirror image distribution in connecting piece (501), electromagnet (1203) and adjacent trigger lever (1202) sliding fit.
10. A drop-resistant motor-commutated pumping unit according to claim 9, wherein: one end of the trigger rod (1202) close to the adjacent second hydraulic rod (503) can be attracted by a magnet, and the sliding connection part of the trigger rod (1202) and the adjacent electromagnet (1203) can not be attracted by the magnet.
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