Self-balancing type rope hanger
Technical Field
The utility model relates to the technical field of tower type pumping units, in particular to a self-balancing type rope hanger.
Background
The tower-type pumping unit is a pumping unit integrating the modern mechanical manufacturing technology, the control technology, the power electronic technology and the electromechanical integration technology, and is perfectly combined with the control system to drive the motor to operate, the power source and the terminal load of the pumping unit are made to perform reversing motion through combined deceleration transmission, the polished rod is dragged to repeatedly operate up and down, balance is formed by the polished rod and the counterweight, the processes of storing and releasing potential energy are continuously exchanged with each other, balance during operation is realized, the mechanical efficiency reaches more than 90%, reactive loss is close to zero, the effect of four-two jack is achieved, and compared with the conventional pumping unit, the energy-saving effect reaches 30-70%, and the problems of low mechanical efficiency, difficulty in realizing long stroke and high energy consumption of the conventional pumping unit are solved.
In the existing tower-type pumping unit, a rope hanger is an indispensable component, the tail ends of two belts are usually connected with the rope hanger, one end of a threaded screw rod at two ends of the rope hanger is hinged with a belt connector, the other end of the threaded screw rod penetrates through a rope hanger body, a spherical gasket is additionally arranged between the threaded screw rod and the rope hanger body after a nut is arranged, the rope hanger is designed with a conical hole and is matched with the spherical gasket, and the spherical gasket and the designed conical hole are also additionally arranged between a wellhead polished rod clip and the rope hanger so as to adjust the length error generated in the running process of the two belts and reduce the bending stress born by the threaded screw rod; however, the mode can only be relieved to a certain extent, under the condition of large load or poor lubrication, the screw rod or the polished rod still receives large bending stress, so that the rope hanger is inclined, the polished rod moves to swing, and when the bending stress is large, the polished rod is possibly broken, and continuous and reliable operation of equipment is not facilitated.
Disclosure of Invention
In order to solve the technical problems in the background art, the self-balancing type rope hanger is used for avoiding bending stress on belts during operation of a pumping unit, and even if length errors exist in two belts, the stress at two ends of the steel wire rope can be automatically balanced through sliding of the steel wire rope wheel and the steel wire rope with the crimping rope sleeve, so that the lower rope hanger body is ensured to be kept horizontal and vertical to a polished rod, and the polished rod is ensured not to be broken due to the bending stress.
The technical scheme of the utility model is as follows:
the utility model provides a self-balancing type rope hanger, includes double belt, still includes compensating beam, pulley assembly, wire rope and rope suspension subassembly, compensating beam both sides and double belt fixed connection, pulley assembly articulates to be connected in compensating beam central point put, wire rope middle part cup joints at pulley assembly top, wire rope and pulley assembly sliding connection, and rope suspension subassembly is located under the compensating beam, and the rope suspension subassembly is passed at wire rope both ends, and the wire rope both ends are equipped with the fag end with rope suspension subassembly bottom butt.
Further, the balance beam comprises a plurality of first pin shafts, two identical first side plates and two identical second side plates, first pin shaft holes are formed in two sides of each of the first side plates and the second side plates, and the connectors of the belt are hinged with the first side plates and the second side plates through the first pin shaft holes.
Further, the pulley assembly comprises a steel wire rope wheel, a bearing, a second pin shaft hole and a second pin shaft, the bearing is arranged in the second pin shaft hole, and the second pin shaft sequentially penetrates through the first side plate, the bearing and the second side plate to hinge the balance beam and the pulley assembly.
Further, the balance beam further comprises a stop backing plate, a flat groove is formed in the top surface of one end of the second pin shaft, which is located at the first side plate, the bottom of the stop backing plate is clamped with the flat groove, and the stop backing plate is fixed with the first side plate through bolts.
Further, the rope hanging component comprises a rope hanging device body, first U-shaped grooves are formed in two sides of the rope hanging device body, the steel wire rope moves in the two first U-shaped grooves, and the top of the rope sleeve is in butt joint with the bottom of the rope hanging device body.
Further, the side end part of the first U-shaped groove is provided with an anti-falling bolt for preventing the steel wire rope from falling off the first U-shaped groove.
Further, the second U-shaped groove is longitudinally formed in the middle of the rope hanger body, the rope hanger assembly further comprises a cover plate, the cover plate is fixed with the rope hanger body through bolts, the middle of the cover plate extends to the rope hanger body to form a protruding portion, and a polish rod fixing hole is formed between the protruding portion and the second U-shaped groove.
Further, a steel wire rope groove is formed in the outer circumferential wall of the steel wire rope wheel, and the middle part of the steel wire rope is sleeved in the steel wire rope groove.
Compared with the prior art, the utility model has the beneficial effects that:
(1) According to the self-balancing type rope hanger, two sides of a balance beam are fixedly connected with two belts, a pulley assembly is hinged to the center of the balance beam, the middle of a steel wire rope is sleeved on the top of the pulley assembly, the steel wire rope is in sliding connection with the pulley assembly, the rope hanger assembly comprises a rope hanger body, first U-shaped grooves are formed in two sides of the rope hanger body, two ends of the steel wire rope move in the first U-shaped grooves, accordingly stress at two ends of the steel wire rope is balanced automatically, the rope hanger body below the steel wire rope is ensured to be kept horizontal, the rope hanger body is enabled to be vertical to a polished rod, and therefore the polished rod is ensured not to be broken due to bending stress.
Drawings
For a clearer description of embodiments of the utility model or of solutions in the prior art, the drawings which are used in the description of the embodiments or of the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a self-balancing rope hanger according to the present utility model;
FIG. 2 is a schematic diagram of a self-balancing rope hanger according to the present utility model;
FIG. 3 is a schematic illustration of a self-balancing rope hanger pulley assembly of the present utility model;
wherein, 1, balance beam; 11. a first pin; 12. a first side plate; 13. a second side plate; 14. a first pin hole; 15. a stop pad; 2. a pulley assembly; 21. a wire rope sheave; 22. a bearing; 23. a second pin hole; 24. a second pin; 25. a wire rope groove; 26. a flat groove; 3. a wire rope; 4. a suspension cord assembly; 41. a rope hanger body; 42. a first U-shaped groove; 43. a second U-shaped groove; 44. a cover plate; 45. a protruding portion; 46. a polish rod fixing hole; 47. an anti-drop bolt; 5. double belts; 6. rope sleeve.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
The utility model will be discussed in detail with reference to fig. 1 to 3 and the embodiments thereof.
The self-balancing type rope hanger comprises a double belt 5, a balance beam 1, pulley assemblies 2, a steel wire rope 3 and a rope hanging assembly 4, wherein two sides of the balance beam 1 are fixedly connected with the double belt 5, the pulley assemblies 2 are hinged to the center of the balance beam 1, the middle part of the steel wire rope 3 is sleeved at the top of the pulley assemblies 2, the steel wire rope 3 is in sliding connection with the pulley assemblies 2, the rope hanging assembly 4 is arranged under the balance beam 1, two ends of the steel wire rope 3 penetrate through the rope hanging assembly 4, and rope sleeves 6 which are in butt joint with the bottoms of the rope hanging assemblies 4 are arranged at two ends of the steel wire rope 3; wherein, the two rope loops 6 are arranged at the same height to ensure that the rope hanger is vertical to the polish rod when the rope hanger works normally; in the operation process of the oil pumping machine, when uneven stress of the belts occurs or length errors exist in the double belts 5, when the balance beam 1 inclines, the steel wire rope 3 slides along the pulley assembly 2 for a certain distance, and the stress at two ends of the steel wire rope 3 is automatically balanced due to the gravity action of the lower rope hanger, so that the steel wire rope 3 slides to the original position, the lower rope hanger body 41 is ensured to be kept horizontal and vertical to the polished rod, and therefore the polished rod is ensured not to be broken due to bending stress.
Specifically, as shown in fig. 2, the balance beam 1 includes a plurality of first pin shafts 11, two identical first side plates 12 and second side plates 13, two sides of the first side plates 12 and the second side plates 13 are symmetrically provided with first pin shaft 11 holes, and the first pin shafts 11 hinge joints of the belt with the first side plates 12 and the second side plates 13 through the first pin shaft holes.
Specifically, as shown in fig. 2 and 3, the pulley assembly 2 includes a wire rope sheave 21, a bearing 22, a second pin shaft hole 23 and a second pin shaft 24, the bearing 22 is installed in the second pin shaft hole 23, and the second pin shaft 24 passes through the first side plate 12, the bearing 22 and the second side plate 13 in sequence to hinge the balance beam 1 and the pulley assembly 2; preferably, the bearing 22 adopts a lubrication-free bearing 22, so that friction force generated when the steel wire rope pulley 21 rotates is reduced, the second pin shaft 24 is used for fixing the steel wire rope pulley 21, when the balance beam 1 tilts, the steel wire rope pulley 21 rotates to drive the steel wire rope 3 to slide for a certain distance, and then the steel wire rope 3 automatically balances the stress on two ends of the steel wire rope 3 under the action of the gravity of the rope hanger body 41, so that the steel wire rope 3 slides to the original position, and the lower rope hanger body 41 is kept horizontal and vertical to a polished rod.
Specifically, as shown in fig. 3, the balance beam 1 further includes a stop pad 15, a flat groove 26 is formed on the top surface of one end of the first side plate 12, which is located by the second pin shaft 24, the bottom of the stop pad 15 is clamped with the flat groove 26, and the stop pad 15 is fixed with the first side plate 12 through bolts; the stop pad 15 is used for fixing the second pin 24 on the first side plate 12, so as to prevent the second pin 24 from being separated from the balance beam 1 to cause accidents.
Specifically, as shown in fig. 2, the rope hanger assembly 4 includes a rope hanger body 41, first U-shaped grooves 42 are formed in two sides of the rope hanger body 41, the steel wire rope 3 moves in the first U-shaped grooves 42, the top of the rope sleeve 6 is abutted to the bottom of the rope hanger body 41, the rope sleeve 6 is used for supporting the rope hanger body 41 to lift the rope hanger, when the balance beam 1 is inclined, the gravity at one tilting end of the rope hanger body 41 acts on the rope sleeve 6 at one end of the steel wire rope 3, and the stress of the rope hanger body 41 is balanced, so that the rope hanger is horizontal.
Specifically, as shown in fig. 2, the side end portion of the first U-shaped groove 42 is provided with a drop preventing bolt 47 for preventing the wire rope 3 from dropping out of the first U-shaped groove 42, and the drop preventing bolt 47 is used for preventing the wire rope 3 from dropping out of the hanger body 41.
Specifically, as shown in fig. 2, a second U-shaped groove 43 is longitudinally formed in the middle of the rope hanger body 41, the rope hanger assembly 4 further includes a cover plate 44, the cover plate 44 and the rope hanger body 41 are fixed by bolts, a protruding portion 45 extends from the middle of the cover plate 44 to the rope hanger body 41, a polish rod fixing hole 46 is formed between the protruding portion 45 and the second U-shaped groove 43, and a polish rod is installed in the polish rod fixing hole 46.
Specifically, as shown in fig. 3, a wire rope groove 25 is formed in the outer circumferential wall of the wire rope wheel 21, and the middle part of the wire rope 3 is sleeved in the wire rope groove 25, so that the stability of the wire rope 3 during sliding is improved, and the wire rope 3 is prevented from moving the wire rope wheel 21.
The utility model has been further described with reference to specific embodiments, but it should be understood that the detailed description is not to be construed as limiting the spirit and scope of the utility model, but rather as providing those skilled in the art with the benefit of this disclosure with the benefit of their various modifications to the described embodiments.