A pumping unit unloading detection device

Abstract

The application relates to the oil pumping unit lifting technical field, and discloses an oil pumping unit load loss detection device, which comprises an oil pumping unit frame for supporting the whole device, a reversing assembly and a support which are respectively installed on the oil pumping unit frame, and a convex frame fixedly installed on the top of the support; a detection assembly for detecting the load loss of the oil pumping unit, which is installed on the side wall of the convex frame; a field prompt assembly for timely issuing a physical alarm prompt when the oil pumping unit loses load, which is installed on the top of the convex frame; and a vibration dust removal assembly for cleaning the flying dust attached to the detection assembly in a vibration mode, which is installed on the top of the support. The phenomenon that the flexible pumping rod bends downward after a real flying rope is utilized to determine whether the long-stroke oil pumping unit truly has the flying rope phenomenon, and the error that the existing technology determines the false flying rope as the flying rope when the speed at which the drum releases the flexible light rod is equal to the descending speed of the flexible light rod is solved.

Description

Technical Field

[0001] This invention relates to the field of oilfield pumping unit lifting technology, specifically to a pumping unit unload detection device. Background Technology

[0002] There are various types of pumping units used for crude oil lifting in oilfields. One type, the long-stroke pumping unit, has an operating stroke of 10-50 meters and a stroke speed adjustable down to 0.1 strokes per minute. It features a long stroke, low stroke speed, low energy consumption, and high pump efficiency, making it suitable for low-yield, low-permeability oilfields with low fluid production. During the downstroke phase of this type of long-stroke pumping unit, when the speed at which the drum releases the flexible polished rod exceeds its downward speed, the flexible polished rod will experience significant sag, bending, or even accumulation between the drum and the steering pulley. At this point, the downward load appears as no load, a phenomenon known as "rope drift." If rope drift occurs and the long-stroke pumping unit is not stopped promptly, it can pose safety hazards to production and even cause a rollover accident.

[0003] To avoid safety hazards caused by the drifting rope problem, the field application technology mainly uses the presence of no-load current value in the down-flow current data of the long-stroke pumping unit motor received by the intelligent control cabinet to determine the drifting rope, and then stop the operation of the long-stroke pumping unit. The existing technology "ZL201810483074.3" discloses "oil production equipment and oil production system" which uses a device installed on the steering bracket and electrically connected to the intelligent control drive device to collect the tension data of the flexible smooth rod and send the tension data to the force sensor of the intelligent control drive device to reflect the download situation during the down-stroke operation of the long-stroke pumping unit. The drifting rope is determined by the sudden change of the download to no-load, and the intelligent control drive device issues a stop command to stop the operation of the long-stroke pumping unit. However, when the speed at which the drum releases the flexible rod equals the downward speed caused by the rod's own weight, the download during the downstroke of the long-stroke pumping unit tends to be unloaded, and the rope drift problem will not occur. Applying either of the above two judgment methods will result in a rope drift, triggering a shutdown command. This is essentially a "false rope drift," and the judgment result is inevitably a misjudgment. Furthermore, once shut down using either of these techniques, even if the rope drift phenomenon disappears, the unit cannot be automatically restarted. Manual on-site verification is required before restarting. Prolonged well shutdowns can lead to stuck well problems, severely impacting the operating rate of the long-stroke pumping unit and crude oil production. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a pumping unit unload detection device, which solves the problems mentioned in the background art, such as the incorrect determination of false rope drift when the speed at which the drum releases the flexible guide rod is equal to the downward speed generated by the self-weight of the flexible guide rod, and the inability to automatically restart after the rope drift phenomenon disappears after shutdown.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pumping unit unload detection device, comprising: The pumping unit frame supports the entire unit and is equipped with a reversing assembly and a bracket, as well as a convex frame fixedly mounted on the top of the bracket. A detection component, used to detect unload conditions of the oil pumping unit, is installed on the side wall of the convex frame; A field warning component, used to promptly issue a physical alarm when the pumping unit loses load, is installed on the top of the convex frame; A vibration dust removal assembly, used to clean dust adhering to the detection assembly by vibration, is installed on the top of the bracket; A lubrication assembly, used to ensure smooth operation of the moving end of the detection assembly, is mounted at the bottom of the bracket; A drive assembly for driving the lubrication assembly and the vibration dust removal assembly is mounted at the bottom of the bracket; A coordination component, used to control the start and stop of the vibration dust removal component, is installed on the outside of the vibration dust removal component.

[0006] Preferably, the detection assembly includes two side plates and two measuring rods. The two side plates are respectively fixedly connected to both sides of the convex frame. A displacement detector is fixedly connected to the side wall of the side plate. A measuring wheel is installed at the input end of the displacement detector. The bottom ends of the two measuring rods are respectively fixedly connected to both sides of the top of the convex frame. A first spring is sleeved on the outside of the measuring rod. A limit cap is fixedly connected to the top of the measuring rod. A measuring crossbar is slidably connected between the outer periphery of the two measuring rods. The outer periphery of the measuring wheel and the bottom of the measuring crossbar abut against each other. A contact roller is rotatably connected to the center of the top of the measuring crossbar.

[0007] Preferably, the on-site prompting component includes a frame, two electrode plates, and an audible and visual alarm. The bottom of the frame is fixedly connected to the middle of the convex frame. Follower rods are slidably connected to both sides inside the frame. The top of each follower rod passes through the frame and is fixedly connected to the bottom of the measuring crossbar. A conductive sheet is fixedly connected between the bottom ends of the two follower rods. The bottoms of the two electrode plates are respectively fixedly connected to the two sides of the middle of the convex frame. The top of the audible and visual alarm is installed at the bottom of the convex frame. Both electrode plates are electrically connected to the audible and visual alarm.

[0008] Preferably, dustproof plates are fixedly connected to both sides of the frame, and the electrode sheet and the conductive sheet are located inside the frame.

[0009] Preferably, the vibration dust removal assembly includes two vibration rods, which are slidably connected to the outer sides of the top of the bracket respectively. A second spring is sleeved on the outer periphery of each vibration rod. A pressing plate is fixedly connected to the top of each vibration rod. A connecting base plate is fixedly connected between the bottom ends of the two vibration rods. A traction rope is fixedly connected to the bottom of the connecting base plate. The bottom of the pressing plate abuts against the top of the measuring crossbar.

[0010] Preferably, the lubrication assembly includes an oil tank, a cylinder, and two fixed pipes. The outer side of the oil tank is fixedly connected to one side of the bottom of the support, and the outer side of the cylinder is fixedly connected to the other side of the bottom of the support. A piston is slidably connected inside the cylinder, a T-shaped rod is fixedly connected to the top of the piston, and a third spring is provided at the bottom of the piston. An oil inlet pipe is connected between the cylinder and the oil tank, and an electromagnetic one-way valve is installed at one end of the oil inlet pipe. The two fixed pipes are respectively fixedly connected to the top edge of the support, and a nozzle is fixedly connected to the top of the fixed pipe. The nozzle is located between the limit cap and the measuring crossbar. A transfer pipe is connected between the bottom ends of the two fixed pipes, and an oil outlet pipe is connected between the transfer pipe and the cylinder. A check valve is installed at one end of the oil outlet pipe.

[0011] Preferably, a stabilizing frame is fixedly connected to the top of the cylinder, and the T-shaped rod slides along the outer periphery and penetrates the interior of the stabilizing frame.

[0012] Preferably, the reversing assembly includes a mounting base, the bottom of which is fixedly connected to the top of the pumping unit frame, a drive shaft is rotatably connected to the top of the mounting base, a steering pulley is fixedly connected to the middle of the drive shaft, and a drive pulley is fixedly connected to one end of the drive shaft.

[0013] Preferably, the drive assembly includes a support base, the bottom of which is fixedly connected to the middle side of the bottom of the bracket. A driven pulley is rotatably connected inside the support base. A crankshaft is fixedly connected to the side of the driven pulley away from the support base. The outer periphery of the crankshaft abuts against the top of the T-shaped rod. A belt is sleeved between the driven pulley and the driving pulley. A drive disc is fixedly connected to the end of the driven pulley away from the crankshaft. An eccentric shaft is rotatably connected to the edge of the drive disc. The outer periphery of the eccentric shaft is connected to the bottom end of the oil inlet pipe.

[0014] Preferably, the coordination component includes a storage shell, the top of which is fixedly connected to the bottom of the connecting base plate, a cylinder is fixedly connected to the outer wall of the storage shell, a movable block is fixedly connected to the output end of the cylinder, the outer side of the movable block is slidably connected to the inside of the storage shell, a storage wheel is rotatably connected to the side wall of the movable block, and the traction rope extends into the storage shell and is wrapped around the outside of the storage wheel.

[0015] This invention provides a pumping unit unload detection device. It has the following beneficial effects: 1. This invention provides accurate rope drift detection with no false rope drift. Utilizing the phenomenon of the flexible sucker rod bending downwards after a true rope drift, a pumping unit unload detection device is designed. The device determines whether a true rope drift has occurred in a long-stroke pumping unit by measuring the downward displacement of the flexible sucker rod. This solves the problem of incorrectly identifying false rope drift as rope drift when the speed at which the drum releases the flexible rod equals the downward speed of the flexible rod, as seen in existing technologies that use no-load current or no-load load for detection.

[0016] 2. This invention offers accurate detection with a low failure rate. Utilizing a detection crossbar and dual displacement detectors, the crossbar is perpendicular to the flexible guide rod. The crossbar's length is within the guide rod's range of motion. The guide rod's downward movement at any position will press down on the crossbar. Downward movement at either end of the crossbar will trigger one of the displacement detectors. The two detectors work in parallel, and the displacement detection function is achieved simply by activating one. Simultaneously, the convex design of the main frame limits the downward movement of the crossbar, preventing damage to the return spring and displacement detectors, thus reducing the failure rate.

[0017] 3. This invention features automatic start / stop, resulting in significant cost reduction and efficiency improvement. It employs a detection crossbar return structure design. As the flexible guide rod continues to descend, it gradually straightens between the roller and the steering pulley. The detection crossbar gradually resets under the action of the return spring. When the flexible guide rod disengages from the detection crossbar, the detection wheel of the displacement detector resets, and the displacement signal from the displacement detector disappears. The intelligent control system of the long-stroke pumping unit receives this signal and determines that the drifting rope has been eliminated, executing a start-up command with a 5-second delay before starting the unit. This solves the problem in existing technologies where automatic start-up is not possible even after the drifting rope phenomenon disappears, requiring manual on-site verification before start-up, which severely impacts the operating rate and crude oil production of long-stroke pumping units.

[0018] 4. This invention, through the coordinated operation of the vibrating rod, second spring, pressing plate, and traction rope of the vibration dust removal component, effectively removes dust and other adhering substances from the detection components (especially the measuring crossbar and measuring rod), thereby ensuring smooth movement of the first spring and measuring crossbar during displacement or reset. Continuous drive by the eccentric shaft ensures efficient and uniform vibration dust removal, avoiding false alarms or missed alarms caused by rope drift due to dust accumulation. Furthermore, the component design incorporates an adjustment mechanism for the cylinder and housing, allowing flexible control of the dust removal function's activation and deactivation, preventing unnecessary vibration interference during equipment operation when dust removal is not required. Overall, this improves the device's operational reliability and ease of cleaning and maintenance.

[0019] 5. This invention achieves precise lubrication of the contact area between the measuring crossbar and the measuring rod through the structure of the lubrication assembly, including the oil tank, cylinder, piston, fixed pipe, and nozzle. The linkage drive of the crankshaft and T-bar ensures that the lubricating oil is evenly sprayed onto the surfaces of the components requiring lubrication, reducing friction and wear between components and extending the service life of the device. Simultaneously, the lubrication process is synchronized with the operation of the detection and vibration dust removal components, avoiding malfunctions caused by insufficient or excessive lubrication. Furthermore, the combined design of the electromagnetic one-way valve and check valve effectively prevents lubricating oil backflow or leakage, ensuring the high efficiency and stability of the lubrication system, further improving detection accuracy and the overall operating efficiency of the device. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the convex frame structure of the present invention; Figure 3 This is a schematic diagram of the contact roller structure of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the detection component structure of the present invention; Figure 6 This is a schematic diagram of the structure of the vibration dust removal component of the present invention; Figure 7 This is a schematic diagram of the traction rope structure of the present invention; Figure 8 for Figure 7 Enlarged view at point B in the middle; Figure 9 This is a schematic diagram of the drive component structure of the present invention; Figure 10 This is a partial structural diagram of the lubrication assembly of the present invention.

[0021] The components include: 1. Pumping unit frame; 2. Mounting base; 3. Drive shaft; 4. Steering pulley; 5. Drive pulley; 6. Bracket; 7. Convex frame; 8. Side plate; 9. Displacement detector; 10. Measuring wheel; 11. Measuring rod; 12. First spring; 13. Limit cap; 14. Measuring crossbar; 15. Contact roller; 16. Follower rod; 17. Conductive sheet; 18. Frame; 19. Dustproof plate; 20. Electrode plate; 21. Audible and visual alarm; 22. Vibration rod; 23. Second spring; 24. Pressing plate. 25. Connecting base plate; 26. Traction rope; 27. Storage shell; 28. Cylinder; 29. ​​Movable block; 30. Storage wheel; 31. Oil tank; 32. Cylinder; 33. Piston; 34. T-shaped rod; 35. Third spring; 36. Oil inlet pipe; 37. Electromagnetic check valve; 38. Fixed pipe; 39. Nozzle; 40. Transfer pipe; 41. Oil outlet pipe; 42. Check valve; 43. Stabilizer; 44. Support base; 45. Driven pulley; 46. Crankshaft; 47. Drive disc; 48. Eccentric shaft. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0023] Please see the appendix Figure 1 -Appendix Figure 10 This invention provides a pumping unit unload detection device, which includes: a pumping unit frame 1 for supporting the entire device, on which a reversing assembly and a bracket 6 are respectively installed, and a convex frame 7 fixedly installed on the top of the bracket 6.

[0024] The reversing assembly includes a mounting base 2, the bottom of which is fixedly connected to the top of the pumping unit frame 1. A drive shaft 3 is rotatably connected to the top of the mounting base 2. A steering pulley 4 is fixedly connected to the middle of the drive shaft 3 to guide the direction of the flexible guide rod and rotate accordingly. One end of the drive shaft 3 is fixedly connected to a drive pulley 5, which transmits power through a belt and a driven pulley 45.

[0025] A detection assembly, used to detect the unload condition of the pumping unit, is installed on the side wall of the convex frame 7. The detection assembly includes two side plates 8 and two measuring rods 11. The two side plates 8 are respectively fixedly connected to both sides of the convex frame 7. Displacement detectors 9 are fixedly connected to the side walls of the side plates 8 to detect the displacement of the measuring crossbar 14 and output corresponding signals. A measuring wheel 10 is installed at the input end of the displacement detector 9 to abut against the bottom of the measuring crossbar 14 and rotate as the measuring crossbar 14 moves up and down. The bottom ends of the two measuring rods 11 are respectively fixedly connected to the top sides of the convex frame 7. A first spring 12 is sleeved on the outer side of the measuring rod 11 to provide elastic force when the measuring crossbar 14 is reset. A limit cap 13 is fixedly connected to the top of the measuring rod 11 to limit the stroke of the first spring 12 and the measuring crossbar 14. A measuring crossbar 14 is slidably connected to the top of the outer periphery between the two measuring rods 11 to move up and down with the state of the flexible rod. A contact roller 15 is rotatably connected at the top center of the measuring crossbar 14. The contact roller 15 is used to reduce wear when in contact with the flexible guide bar.

[0026] A field warning component, used to promptly issue a physical alarm when the pumping unit fails to operate, is installed on top of the convex frame 7. The field warning component includes a frame 18, two electrode plates 20, and an audible and visual alarm 21. The bottom of the frame 18 is fixedly connected to the middle of the convex frame 7. Follower rods 16 are slidably connected to both sides inside the frame 18, and the follower rods 16 push the conductive plate 17 as the measuring crossbar 14 moves. The top of the follower rods 16 passes through the frame 18 and is fixedly connected to the bottom of the measuring crossbar 14. The conductive plate 17 is fixedly connected between the bottom ends of the two follower rods 16. The bottoms of the two electrode plates 20 are respectively fixedly connected to both sides of the middle of the convex frame 7, forming a closed circuit by contacting the conductive plate 17. The top of the audible and visual alarm 21 is installed at the bottom of the convex frame 7, activating the audible and visual alarm upon receiving a closed signal. Dustproof plates 19 are fixedly connected to both sides of the frame 18 to prevent dust from entering the circuit area and ensure the reliability of the alarm system.

[0027] A vibration dust removal assembly, used to clean dust adhering to the detection assembly through vibration, is mounted on the top of the support 6. The assembly includes two vibration rods 22, which are slidably connected to the outer sides of the top of the support 6 to transmit vibration force. A second spring 23 is sleeved around the outer periphery of each vibration rod 22, providing a restoring force during vibration. A pressing plate 24 is fixedly connected to the top of each vibration rod 22, contacting the top of the measuring crossbar 14 and transmitting vibration force. A connecting base plate 25 is fixedly connected between the bottom ends of the two vibration rods 22, and a traction rope 26 is fixedly connected to the bottom of the connecting base plate 25.

[0028] A lubrication assembly, used to ensure smooth operation of the moving end of the detection assembly, is installed at the bottom of the bracket 6. The lubrication assembly includes an oil tank 31, a cylinder 32, and two fixed pipes 38. The oil tank 31 stores lubricating oil to ensure the continuity of the lubrication process. The outer side of the cylinder 32 is fixedly connected to the other side of the bottom of the bracket 6, and a piston 33 is slidably connected inside the cylinder 32. The piston 33 is used to compress the lubricating oil and inject it into the oil outlet pipe 41. A T-shaped rod 34 is fixedly connected to the top of the piston 33, which is used to generate up-and-down movement under the drive of the crankshaft 46. A nozzle 39 is fixedly connected to the top of the fixed pipe 38, which is used to spray lubricating oil evenly on the outer circumferential surface of the measuring rod 11.

[0029] Working principle: As the winch located on the left side of the device operates, the flexible rod of the pumping unit is continuously released downward from the winch drum under the action of the reversing assembly. As the flexible rod is continuously released, the steering pulley 4 on the reversing assembly will also rotate, thereby driving the drive pulley 5 to rotate. When a drifting rope phenomenon occurs, the flexible guide rod will droop and bend downwards, tending to fall. At this time, the flexible guide rod will come into contact with the contact roller 15. The rotation of the contact roller 15 avoids excessive wear on the flexible guide rod during contact. At this time, the contact roller 15 is squeezed by the flexible guide rod, pushing the measuring crossbar 14 downwards. After being subjected to force, the measuring crossbar 14 will move downwards along the measuring rod 11, squeezing the first spring 12 and the measuring wheel 10, causing the first spring 12 to be compressed. When there is no drifting rope phenomenon, the first spring 12 will reset and push the measuring crossbar 14 back to its original position. When the measuring wheel 10 is squeezed by the measuring crossbar 14, it will deflect downwards, thereby transmitting a signal to the displacement detector 9. At this time, the displacement data is greater than 0 cm. The displacement detector 9 transmits the detected displacement data of the measuring crossbar 14 to the long-stroke pumping unit intelligent control system. After receiving the displacement data of the measuring crossbar 14, the long-stroke pumping unit intelligent control system determines that it is a drifting rope and executes a stop command to stop the machine. At this time, the winch drum no longer releases the flexible guide rod.

[0030] Simultaneously, when the drifting rope phenomenon occurs, the measuring crossbar 14 will also drive the two follower rods 16 to move downwards, causing the follower rods 16 to push the conductive plate 17 downwards. This causes the conductive plate 17 to contact the two electrode plates 20 located on the convex frame 7. At this time, the circuit of the audible and visual alarm 21 forms a closed circuit, and the audible and visual alarm 21 is activated, emitting sound and warning lights, thereby immediately alerting the operators on site and assisting the system in determining whether to stop the machine. The dustproof plates 19 on both sides of the frame 18 prevent dust from the construction site from falling on the electrode plates 20 and the conductive plate 17, ensuring that the circuit can be stably connected when the drifting rope phenomenon occurs.

[0031] When excessive dust accumulates on the first spring 12 of the detection component due to excessive dust at the construction site, in order to prevent the first spring 12 from being compressed by the drift rope during the measurement of the crossbar 14, the excessive dust on the first spring 12 may affect its compression stroke and cause deviations, leading to false alarms or missed alarms regarding the drift rope phenomenon, the worker can temporarily disable the system's automatic shutdown function and simultaneously activate the cylinder 28 on the coordination component to pull the movable block 29 and the storage wheel 30 towards the storage shell 27, thereby storing a section of the traction rope 26 inside the storage shell 27, thus shortening the length of the traction rope 26 outside. At this time, the rotating drive pulley 5, under the action of the belt, drives the driven pulley 45 to rotate, which in turn drives the drive disc 47 to rotate. The rotation of the drive disc 47 drives the eccentric shaft 48 to rotate. The eccentric shaft 48 continuously pulls the shortened traction rope 26 downward, causing the traction rope 26 to pull the connecting base plate 25 downward, which in turn pulls the vibrating rod 22 and the pressing plate 24 downward. When the pressing plate 24 moves downward, it pushes the measuring crossbar 14 to move downward and compresses the second spring 23. With the help of the continuous rotation of the eccentric shaft 48 and the elastic force of the second spring 23, the measuring crossbar 14 will move up and down continuously. Then, by vibrating the measuring crossbar 14 and compressing the first spring 12, the dust attached to the measuring crossbar 14 and the first spring 12 is forced to fall off, ensuring that the first spring 12 and the measuring crossbar 14 remain smooth when under force, and that the displacement or compression stroke will not be deviated due to excessive dust, thus ensuring the accuracy of the drift rope detection. Meanwhile, when dust removal is not required, simply activate cylinder 28 to push movable block 29, causing storage wheel 30 to extend outward from inside storage shell 27, thereby releasing traction rope 26 stored inside storage shell 27. This extends the length of traction rope 26 exposed to the outside, preventing the eccentric shaft 48 from pulling the connecting base plate 25 downward when it is traction rope 26 in circular motion. Consequently, the pressing plate 24 cannot be driven to push the measuring crossbar 14 downward, ensuring that the device will not trigger false alarms of rope drifting during normal operation.

[0032] Simultaneously, during the operation of the vibration dust removal assembly, the rotating driven pulley 45 also drives the crankshaft 46 to continuously rotate. During this process, the crankshaft 46 continuously presses down on the T-shaped rod 34. When the crankshaft 46 moves to the lowest point, the T-shaped rod 34 pushes the piston 33 to be completely pressed into the interior of the cylinder 32. Then, the lubricating oil stored inside the cylinder 32 is injected into the oil outlet pipe 41 through the check valve 42. After that, the lubricating oil will enter the two fixed pipes 38 along the oil outlet pipe 41 and the transfer pipe 40, and then be sprayed out from the nozzle 39 at the top. Since the pressing plate 24 drives the measuring crossbar 14 to move down and the lubricating oil is sprayed out from the nozzle 39 at the same time, the lubricating oil will fall directly on the outer periphery of the measuring rod 11. As the measuring crossbar 14 moves around the outer periphery of the measuring rod 11, the contact space between the measuring crossbar 14 and the measuring rod 11 is fully lubricated to ensure smooth movement and to ensure that the detection assembly can be triggered immediately when the flexible rod exhibits a rope drifting phenomenon. When the crankshaft 46 rotates back to its highest point, the compressed third spring 35 inside the cylinder 32 resets, pushing the piston 33 upward. During this process, the piston 33 draws lubricating oil from the oil tank 31 into the cylinder 32 through the cooperation of the solenoid check valve 37 and the oil inlet pipe 36, ready to be discharged during the next maintenance. Simultaneously, when lubricating oil is added, the control system closes the solenoid check valve 37. As the crankshaft 46 rotates and discharges the lubricating oil from the cylinder 32, the cylinder 32 is now sealed. The piston 33, compressed to its lowest point, cannot be pushed upward by the third spring 35 due to negative pressure, thus preventing the T-shaped rod 34 from moving upward. At this point, the crankshaft 46 is undisturbed during its circular motion, ensuring the normal operation of the device.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pumping unit unload detection device, characterized in that, include: The pumping unit frame (1) is used to support the entire device, on which the reversing assembly and the bracket (6) are respectively installed, as well as the convex bracket (7) fixedly installed on the top of the bracket (6). A detection component for detecting unloaded conditions of the pumping unit is installed on the side wall of the convex frame (7); The on-site warning component is used to issue a physical alarm in a timely manner when the pumping unit is unloaded, and it is installed on the top of the convex frame (7); A vibration dust removal assembly is used to clean the dust attached to the detection assembly by vibration, and it is installed on the top of the bracket (6); A lubrication assembly, used to ensure smooth operation of the moving end of the detection assembly, is installed at the bottom of the bracket (6); A drive assembly for driving the lubrication assembly and the vibration dust removal assembly is mounted at the bottom of the bracket (6); A coordination component, used to control the start and stop of the vibration dust removal component, is installed on the outside of the vibration dust removal component.

2. The oil pumping unit unload detection device according to claim 1, characterized in that, The detection assembly includes two side plates (8) and two measuring rods (11). The two side plates (8) are fixedly connected to both sides of the convex frame (7). A displacement detector (9) is fixedly connected to the side wall of the side plate (8). A measuring wheel (10) is installed at the input end of the displacement detector (9). The bottom ends of the two measuring rods (11) are fixedly connected to both sides of the top of the convex frame (7). A first spring (12) is sleeved on the outside of the measuring rod (11). A limit cap (13) is fixedly connected to the top of the measuring rod (11). A measuring crossbar (14) is slidably connected between the outer periphery of the two measuring rods (11). The outer periphery of the measuring wheel (10) and the bottom of the measuring crossbar (14) abut against each other. A contact roller (15) is rotatably connected at the top center of the measuring crossbar (14).

3. The oil pumping unit unload detection device according to claim 2, characterized in that, The on-site prompting component includes a frame (18), two electrode plates (20), and an audible and visual alarm (21). The bottom of the frame (18) is fixedly connected to the middle of the convex frame (7). Both sides of the inside of the frame (18) are slidably connected to follower rods (16). The top of the follower rods (16) passes through the frame (18) and is fixedly connected to the bottom of the measuring crossbar (14). A conductive sheet (17) is fixedly connected between the bottom ends of the two follower rods (16). The bottoms of the two electrode plates (20) are respectively fixedly connected to the two sides of the middle of the convex frame (7). The top of the audible and visual alarm (21) is installed at the bottom of the convex frame (7). Both electrode plates (20) are electrically connected to the audible and visual alarm (21).

4. The oil pumping unit unload detection device according to claim 3, characterized in that, Dustproof plates (19) are fixedly connected to both sides of the frame (18), and the electrode sheet (20) and the conductive sheet (17) are located inside the frame (18).

5. The oil pumping unit unload detection device according to claim 2, characterized in that, The vibration dust removal assembly includes two vibration rods (22), which are slidably connected to the outer sides of the top of the bracket (6). A second spring (23) is sleeved on the outer periphery of the vibration rod (22). A pressing plate (24) is fixedly connected to the top of the vibration rod (22). A connecting base plate (25) is fixedly connected between the bottom ends of the two vibration rods (22). A traction rope (26) is fixedly connected to the bottom of the connecting base plate (25). The bottom of the pressing plate (24) and the top of the measuring crossbar (14) abut against each other.

6. The oil pumping unit unload detection device according to claim 5, characterized in that, The lubrication assembly includes an oil tank (31), a cylinder (32), and two fixed pipes (38). The oil tank (31) is fixedly connected to one side of the bottom of the bracket (6) on the outside, and the cylinder (32) is fixedly connected to the other side of the bottom of the bracket (6) on the outside. A piston (33) is slidably connected inside the cylinder (32). A T-shaped rod (34) is fixedly connected to the top of the piston (33), and a third spring (35) is provided at the bottom of the piston (33). An oil inlet pipe (36) connects the cylinder (32) and the oil tank (31). An electromagnetic check valve (37) is installed at one end of the oil pipe (36). Two fixed pipes (38) are fixedly connected to the top edge of the bracket (6). A nozzle (39) is fixedly connected to the top of the fixed pipe (38). The nozzle (39) is located between the limit cap (13) and the measuring crossbar (14). A transfer pipe (40) is connected between the bottom ends of the two fixed pipes (38). An oil outlet pipe (41) is connected between the transfer pipe (40) and the cylinder (32). A check valve (42) is installed at one end of the oil outlet pipe (41).

7. The oil pumping unit unload detection device according to claim 6, characterized in that, The top of the cylinder (32) is fixedly connected to a stabilizer (43), and the T-shaped rod (34) slides on the outer periphery and penetrates the interior of the stabilizer (43).

8. The oil pumping unit unload detection device according to claim 6, characterized in that, The reversing assembly includes a mounting base (2), the bottom of which is fixedly connected to the top of the pumping unit frame (1), a drive shaft (3) is rotatably connected to the top of the mounting base (2), a steering pulley (4) is fixedly connected to the middle of the drive shaft (3), and a drive pulley (5) is fixedly connected to one end of the drive shaft (3).

9. The oil pumping unit unload detection device according to claim 8, characterized in that, The drive assembly includes a support base (44), the bottom of which is fixedly connected to the bottom middle side of the bracket (6). A driven pulley (45) is rotatably connected inside the support base (44). A crankshaft (46) is fixedly connected to the side of the driven pulley (45) away from the support base (44). The outer periphery of the crankshaft (46) abuts against the top of the T-shaped rod (34). A belt is sleeved between the driven pulley (45) and the driving pulley (5). A drive disc (47) is fixedly connected to the end of the driven pulley (45) away from the crankshaft (46). An eccentric shaft (48) is rotatably connected to the edge of the drive disc (47). The outer periphery of the eccentric shaft (48) is connected to the bottom end of the oil inlet pipe (36).

10. The oil pumping unit unload detection device according to claim 5, characterized in that, The coordination component includes a storage shell (27), the top of which is fixedly connected to the bottom of the connecting base plate (25). A cylinder (28) is fixedly connected to the outer wall of the storage shell (27). A movable block (29) is fixedly connected to the output end of the cylinder (28). The outer side of the movable block (29) is slidably connected to the inside of the storage shell (27). A storage wheel (30) is rotatably connected to the side wall of the movable block (29). The traction rope (26) extends into the storage shell (27) and is wrapped around the outside of the storage wheel (30).

Images