Torsion releasing device for sling of oil pumping unit

Abstract

The utility model relates to the technical field of oil pumping units, in particular to an oil pumping unit sling torsion releasing device. Comprising a beam hanger body, long grooves are formed in the two ends of the beam hanger body, stepped grooves are formed in the upper groove walls and the lower groove walls of the long grooves, large-diameter grooves of the stepped grooves are close to the centers of the long grooves, bearings are installed in the large-diameter grooves of the stepped grooves, inner taper sleeves are installed in inner rings of the bearings, the inner edges of the inner taper sleeves are inner conical surfaces, and rotating pieces are inserted into the inner taper sleeves; the steel wire rope penetrates through the stepped groove and is fixedly connected with the rotating piece. According to the utility model, through integration of the stepped groove and the bearing, steel wire ropes of various specifications are compatible, and the problem of adaptability caused by a complex structure in a traditional scheme is avoided. Detail design such as anti-skid lines and convex edge limiting further reduces the risk that the steel wire rope is disengaged from the groove and slips, the operation safety of equipment is improved, and the steel wire rope is particularly suitable for high-load and high-frequency vibration oil field operation environments.

Description

Technical Field

[0001] This utility model relates to the field of oil pumping unit technology, specifically to an oil pumping unit sling torque release device. Background Technology

[0002] In the oilfield industry, pumping units are the most commonly used hoisting equipment. Among the hoisting mechanisms of pumping units, the most frequently used hoisting component in combination with wellhead suspension ropes and polished rods is the sling, which is mostly made of steel wire rope. Steel wire rope is widely used in beam-type and tower-type pumping units due to its flexibility, high strength, long service life, and low wind resistance. During operation, because the steel wire rope constantly moves up and down, and is composed of many strands of steel wire of different diameters twisted together, twisting can occur. Two or more steel wire ropes may twist together or rotate at a certain angle, and even a single steel wire rope may rotate during the up and down movement. Twisting of the steel wire rope may cause it to deviate from its operating trajectory or even disengage from its groove, resulting in damage to the equipment and downhole equipment.

[0003] Patent document CN220955495U discloses a torque release device for a pumping unit sling, comprising a lower body of a sling and an upper body of a sling fixedly mounted on the lower body of the sling; at least one fixing block is fixedly connected to the lower part of the lower body of the sling; the lower end of the first wire rope is fixedly connected to the fixing block after passing through the upper body and the lower body of the sling in sequence; an annular groove is provided at the lower part of the fixing block, and a cylindrical thrust bearing is provided in the annular groove of the fixing block; a rotating block is rotatably connected to the fixing block through the cylindrical thrust bearing; the upper end of the second wire rope is fixedly connected to the rotating block. This pumping unit sling torque release device, through the coordinated arrangement of a rotating block, a fixed block, a lower suspension device, and an upper suspension device, enables it to fix and connect the first and second wire ropes, and then release the torque of these two fixedly connected wire ropes. After the second wire rope of the pumping unit sling carries a load, it generates a certain torque. The upper end of the second wire rope twists under this torque, driving the rotating block to rotate. The rotating block rotates on the fixed block, releasing the torque. While ensuring a fixed connection between the two, the device achieves the purpose of releasing the torque of the pumping unit wire rope. The upper and lower suspension devices, along with the stop bar, strengthen the fixed connection to the first wire rope, making the connection between the first and second wire ropes more secure. This device can release the torque of the second wire rope, but it cannot release the torque of the first wire rope. Meanwhile, since the rotating block and the fixed block are connected by a set screw and an annular groove, the connection strength between the rotating block and the fixed block is not strong. When the first and second wire ropes are under tension, the rotating block is pressed against the set screw. At this time, the cylindrical thrust bearing is not under force or is under less force. When the first and second wire ropes are under tension, the cylindrical thrust bearing cannot play a role in the rotation of the rotating block.

[0004] Patent document CN205855694U discloses an elevator wire rope end device with a torque self-release function, including a bearing housing with a bearing inside; the bearing housing is fixedly connected to the outer ring of the bearing, and the inner ring of the bearing is fixedly connected to a mounting bushing; a tapered threaded sleeve is fixedly installed inside the mounting bushing; the mounting bushing is used to fix the wire rope end; the upper end of the bearing housing is connected to the upper end of a spring, and the lower end of the spring is connected to a spring seat; the bearing housing and the spring seat are coaxially arranged; through the relative rotation of the inner and outer rings of the bearing, the wire rope can rotate relative to the bearing housing, realizing the torque release. In this technical solution, the wire rope is indirectly connected to the bearing through a connecting component. Applying this to an oil pump suspension device increases equipment costs and requires significant changes to the suspension device's structure. Utility Model Content

[0005] The main purpose of this invention is to provide a torque release device for oil pumping unit slings that can release the torque of a wire rope when it is under stress, thereby improving the connection strength of the wire rope.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] The oil pumping unit sling torque release device includes a suspension cable body. Long grooves are formed at both ends of the suspension cable body. Stepped grooves are formed on both the upper and lower walls of the long grooves. The larger diameter groove of the stepped groove is near the center of the long groove. A bearing is installed inside the larger diameter groove of the stepped groove. An inner conical sleeve is installed in the inner ring of the bearing. The inner edge of the inner conical sleeve is an inner conical surface. The diameter of the inner conical surface at the end furthest from the bottom of the larger diameter groove is larger than the diameter at the end closest to the bottom of the larger diameter groove. A rotating component is inserted into the inner conical sleeve. A wire rope passes through the stepped groove and is fixedly connected to the rotating component. The rotating component includes two assemblies. Each assembly includes an arc-shaped clamp. An arc-shaped plate is concentrically fixed at the upper end of the clamp. The outer edge of the arc-shaped plate is an outer conical surface. After the two assemblies are fixedly connected, the two clamps form a lower cylinder, in which the wire rope is clamped and fixed. The two arc-shaped plates form a conical cylinder, in which the wire rope is clamped and fixed. The conical cylinder is inserted into the inner conical sleeve, with the outer conical surface fitting against the inner conical surface.

[0008] Specifically, an arc-shaped boss is fixed to one end of the jacket facing the stepped groove. After the two components are fixedly connected, the two bosses form a convex ring. The boss, jacket and arc plate are integrally formed.

[0009] Specifically, the bearing is a tapered roller bearing.

[0010] Specifically, the upper and lower stepped grooves are staggered.

[0011] Specifically, stepped holes are provided on both sides of the jacket. After the two jackets are combined, the bolts pass through the corresponding connected stepped holes, and the nuts on the bolts are tightened to fix the two jackets together.

[0012] Specifically, the inner edge of the jacket and the inner edge of the arc plate are both machined with anti-slip textures.

[0013] Specifically, the inner conical sleeve has a protruding edge fixed at one end away from the bottom of the large-diameter groove, and the protruding edge is integrally formed with the inner conical sleeve.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. Through the stepped grooves, bearings, and rotating components symmetrically arranged at both ends of the suspension device body, the torque generated by the wire rope during its reciprocating motion can be effectively released. The bearings are tapered roller bearings, enhancing load-bearing capacity. Combined with the tapered surface fit design of the inner tapered sleeve and the rotating component, they automatically lock when the wire rope is under tension, ensuring torque release while maintaining dynamic stability, avoiding the limitation of traditional devices that can only release torque in one direction.

[0016] 2. The rotating components are designed as separate units, fixed with bolts to form the lower cylinder and the conical cylinder, which, together with the anti-slip texture, achieves multi-point uniform clamping of the wire rope. The conical surface of the inner conical sleeve guides and enhances the clamping force when tightened, while the limiting structure of the boss and the convex edge prevents excessive tension from causing excessive compression and damage to the wire rope, thus balancing connection strength and safety.

[0017] 3. The staggered layout of the stepped grooves and the modular design of the split components simplify the assembly process. The connection method of bolts passing through the stepped holes facilitates on-site disassembly and maintenance. The one-piece molded bosses, sleeves and arc plates reduce the number of parts, reduce manufacturing costs, and improve the overall structural strength.

[0018] 4. The fit between the tapered roller bearing and the inner tapered sleeve allows the rotating parts to rotate freely under the torque of the wire rope, releasing stress; the staggered stepped groove design disperses the stress points. This design can adapt to torque changes under different working conditions, extending the service life of the wire rope and equipment, and reducing the frequency of equipment maintenance.

[0019] 5. By integrating the stepped groove with the bearing, the device is compatible with various specifications of wire ropes, avoiding the compatibility issues caused by the complex structure of traditional solutions. Details such as anti-slip textures and raised edge limiting further reduce the risk of wire rope derailment and slippage, improving equipment operational safety, and making it particularly suitable for high-load, high-frequency vibration oilfield operating environments. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the device.

[0021] Figure 2 This is a schematic diagram showing a steel wire rope being clamped and fixed by a rotating component.

[0022] Figure 3 This is a front view of the wire rope being clamped and fixed by the rotating component.

[0023] Figure 4 This is a schematic diagram of the assembly.

[0024] The components in the attached diagram are named as follows: 1. Suspension device body, 2. Long groove, 3. Steel wire rope, 4. Bearing, 5. Inner cone sleeve, 6. Protruding edge, 7. Jacket, 8. Boss, 9. Bolt, 10. Nut, 11. Arc plate, 12. Stepped hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Example 1: Refer to Figures 1-4As shown, the pumping unit sling torque release device includes a suspension cable body 1. Long grooves 2 are formed at both ends of the suspension cable body 1. Stepped grooves are formed on both the upper and lower walls of the long grooves 2, with the larger diameter groove of the stepped groove close to the center of the long groove 2. The upper and lower stepped grooves are staggered.

[0027] A bearing 4, which is a tapered roller bearing, is installed inside the large-diameter groove of the stepped groove. An inner tapered sleeve 5 is installed inside the inner ring of the bearing 4. The inner edge of the inner tapered sleeve 5 is an inner tapered surface. The diameter of the inner tapered surface at the end away from the bottom of the large-diameter groove is larger than the diameter at the end closer to the bottom of the large-diameter groove. A rotating component is inserted into the inner tapered sleeve 5. A steel wire rope 3 passes through the stepped groove and is fixedly connected to the rotating component.

[0028] The rotating component includes two assemblies, each including an arc-shaped sleeve 7. An arc-shaped plate 11 is concentrically fixed to the upper end of the sleeve 7. The outer edge of the arc-shaped plate 11 is an outer conical surface. The inner edges of both the sleeve 7 and the arc-shaped plate 11 are machined with anti-slip textures.

[0029] After the two components are fixedly connected, the two sleeves 7 form a lower cylinder, and the wire rope 3 is clamped and fixed inside the lower cylinder; the two arc plates 11 form a cone, and the wire rope 3 is clamped and fixed inside the cone. The cone is inserted into the inner cone sleeve 5, and the outer cone surface is in contact with the inner cone surface.

[0030] Both sides of the sleeve 7 are provided with stepped holes 12. After the two sleeves 7 are combined, the bolt 9 passes through the corresponding stepped holes 12. Tightening the nut 10 on the bolt 9 makes the two sleeves 7 fixedly connected.

[0031] When connecting the wire rope 3, the wire rope 3 is passed through the stepped groove and the inner ring of the bearing 4. Then, the two assemblies clamp and fix the end of the wire rope 3, and the two assemblies are fixedly connected by bolts 9 and nuts 10 to form a rotating component. At this time, the end of the wire rope 3 is clamped and fixed in the rotating component. Then, the cone formed by the two arc plates 11 is inserted into the inner cone sleeve 5. After the wire rope 3 is tightened, under the guiding action of the inner cone sleeve 5 on the two arc plates 11, the wire rope 3 is further clamped, which can improve the stability of the connection between the wire rope 3 and the rotating component.

[0032] When the wire rope 3 is taut and generates torque, the wire rope 3, the rotating component, the inner cone sleeve 5, and the inner ring of the bearing 4 can rotate, thereby releasing the torque of the wire rope 3. During the tautness process, the bearing 4 ensures that the wire rope 3 and the rotating component can rotate effectively, and the wire rope 3 can still release torque even when taut, thus improving the stability of the wire rope 3 during operation.

[0033] Example 2: Based on Example 1, referring to... Figures 1-4As shown, an arc-shaped boss 8 is fixed to one end of the sleeve 7 facing the stepped groove. After the two components are fixedly connected, the two bosses 8 form a convex ring. The boss 8, the sleeve 7, and the arc-shaped plate 11 are integrally formed. A convex edge 6 is fixed to one end of the inner conical sleeve 5 away from the bottom of the large-diameter groove. The convex edge 6 is integrally formed with the inner conical sleeve 5.

[0034] By setting the boss 8 and the flange 6, when the wire rope 3 is taut, it is further clamped under the squeezing action of the inner cone sleeve 5 on the two arc plates 11. When the boss 8 contacts the flange 6, the flange 6 can limit the boss 8, which can prevent the wire rope 3 from being damaged due to excessive clamping force of the two assemblies under the guiding action of the inner cone sleeve 5 on the two arc plates 11 when the tension on the wire rope 3 is too large.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A torque release device for a pumping unit sling, comprising a sling body (1), characterized in that, The suspension device body (1) has long grooves (2) at both ends. The upper and lower walls of the long grooves (2) are provided with stepped grooves. The large diameter groove of the stepped groove is close to the center of the long groove (2). A bearing (4) is installed in the large diameter groove of the stepped groove. An inner conical sleeve (5) is installed in the inner ring of the bearing (4). The inner edge of the inner conical sleeve (5) is an inner conical surface. The diameter of the inner conical surface at the end away from the bottom of the large diameter groove is larger than the diameter at the end close to the bottom of the large diameter groove. A rotating component is inserted into the inner conical sleeve (5). The steel wire rope (3) passes through the stepped groove and is fixedly connected to the rotating component. The rotating component includes two assemblies. The assemblies include an arc-shaped clamp (7). An arc-shaped plate (11) is concentrically fixed at the upper end of the clamp (7). The outer edge of the arc plate (11) is an outer conical surface; after the two components are fixedly connected, the two sleeves (7) form a lower cylinder, and the wire rope (3) is clamped and fixed inside the lower cylinder; the two arc plates (11) form a cone, and the wire rope (3) is clamped and fixed inside the cone. The cone is inserted into the inner cone sleeve (5), and the outer cone surface is in contact with the inner cone surface; an arc-shaped boss (8) is fixed at one end of the sleeve (7) facing the stepped groove. After the two components are fixedly connected, the two bosses (8) form a convex ring. The boss (8), the sleeve (7) and the arc plate (11) are integrally formed; a convex edge (6) is fixed at one end of the inner cone sleeve (5) away from the bottom of the large diameter groove. The convex edge (6) is integrally formed with the inner cone sleeve (5).

2. The oil pumping unit sling torque release device according to claim 1, characterized in that, The bearing (4) is a tapered roller bearing.

3. The oil pumping unit sling torque release device according to claim 1, characterized in that, The upper and lower stepped grooves are staggered.

4. The oil pumping unit sling torque release device according to claim 1, characterized in that, Both sides of the sleeve (7) are provided with stepped holes (12). After the two sleeves (7) are combined, the bolt (9) passes through the corresponding stepped holes (12). Tightening the nut (10) on the bolt (9) makes the two sleeves (7) fixedly connected.

5. The oil pumping unit sling torque release device according to claim 1, characterized in that, The inner edge of the jacket (7) and the inner edge of the arc plate (11) are both machined with anti-slip texture.

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