CN217076669U - Pumping unit walking beam is hoist cable anticreep device for lug - Google Patents

Abstract

The utility model relates to a beam-pumping unit walking beam hoist and mount technical field, concretely relates to beam-pumping unit walking beam is hoist cable anticreep device for lug. The lifting rope anti-falling device for the beam lifting lug of the pumping unit comprises an anti-falling clamping ring sleeved on the lifting lug, a lifting rope lifting seat is arranged on one radial side of the anti-falling clamping ring, and a lifting rope clamping groove for embedding a lifting rope is formed in the lifting rope lifting seat; one side of the anti-falling clamp ring back to the sling lifting seat is provided with a bolt connecting seat, a locking bolt is connected in a threaded hole in a threaded manner and used for tightly jacking the outer peripheral surface of the lifting lug when being locked so as to enable the sling lifting seat to press to the sling. The hoist cable can imbed in the hoist cable draw-in groove of hoist cable support seat, and the locking bolt on the bolted connection seat of screwing makes the locking bolt roof pressure on the outer peripheral face of lug to make the hoist cable support the seat and press to the hoist cable, make the hoist cable firmly inlay in the hoist cable draw-in groove, drop from the lug when avoiding the hoist cable can't tighten the lug.

Description

Pumping unit walking beam is hoist cable anticreep device for lug

Technical Field

The utility model relates to a beam-pumping unit walking beam hoist and mount technical field, concretely relates to beam-pumping unit walking beam is hoist cable anticreep device for lug.

Background

To beam-pumping unit, at walking beam hoist and mount in-process, as shown in fig. 1, hang hoist cable 13 respectively on four cylindrical lugs 11 of walking beam 12, four conical lugs 11 use two to be a set of, two sets of lugs 11 are located the intermediate position on the two opposite sides of walking beam 12 respectively, lug 11 includes the stand that anti-disengaging baffle and level extend, stand is used for the cover to establish hoist cable 13, anti-disengaging baffle is located the stand and keeps away from one side of walking beam 12, anti-disengaging baffle's external diameter is greater than the external diameter of stand, in order to prevent that hoist cable 13 sideslips and drops in hoist and mount in-process.

Chinese patent document No. CN209815495U, granted in the prior art, discloses a lifting hook for lifting equipment, which includes a hook head, a hook body and a hook neck, wherein the hook neck is hinged with a separation-preventing clip, the separation-preventing clip includes a clip rod sleeved on the hook neck, one end of the clip rod is provided with a clip plate, one end of the clip plate is hinged on the hook neck, and the other end of the clip plate can be clipped on the inner side of the hook head, so as to prevent a rope hung on the hook head from separating from the hook head.

However, the structure is only used for hanging the hook provided with the rope, and is not suitable for being used for sleeving the lifting lug of the sling. In the actual installation of walking beam, the inhomogeneous condition of atress can appear in the hoist cable on four lugs, leads to some hoist cables can't laminate the lug and sideslip from cylindrical lug very easily and drop, causes the walking beam to fall from the eminence, causes the jack-up injury accident.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a beam-pumping unit is hoist cable anticreep device for beam-pumping unit lug to solve among the prior art technical problem that the hoist cable sideslips and drops easily from the lug.

In order to achieve the above object, the utility model discloses beam-pumping unit is hoist cable anticreep device for beam lug's technical scheme is:

the lifting rope anti-falling device for the beam lifting lug of the pumping unit comprises an anti-falling clamping ring sleeved on the lifting lug, wherein a lifting rope lifting seat is arranged on one radial side of the anti-falling clamping ring, and a lifting rope clamping groove for embedding a lifting rope is formed in the lifting rope lifting seat; one side of lifting the seat is equipped with the bolted connection seat to the hoist cable on the anticreep snap ring dorsad, is equipped with the radial screw hole that link up along the anticreep snap ring on the bolted connection seat, and screw hole female connection has locking bolt, and locking bolt is used for the outer peripheral face of the tight lug in top when locking so that the hoist cable lifts the seat and press to the hoist cable.

The beneficial effects are that: the utility model discloses an among the hoist cable anticreep device for beam-pumping unit walking beam lug, be equipped with the hoist cable draw-in groove that is used for holding the hoist cable on the hoist cable lift seat of anticreep snap ring, after the anticreep snap ring cover was on beam's lug, the hoist cable can imbed in the hoist cable draw-in groove, the locking bolt on the bolted connection seat of screwing makes the locking bolt roof pressure on the outer peripheral face of lug, so that the hoist cable lift seat presses to the hoist cable, make the hoist cable firmly inlay in the hoist cable draw-in groove, drop from the lug when avoiding the hoist cable can't tighten the lug.

The improved sling clamping groove is provided with a notch edge which is used for supporting the bottom of the outer peripheral surface of the lifting lug, an arc-shaped groove is arranged on the notch edge of the sling clamping groove and used for being matched and attached to the outer peripheral surface of the lifting lug

The beneficial effects are that: design like this, when retaining member top tight lug's outer peripheral face, the arc wall of hoist cable draw-in groove contacts completely with the outer peripheral face of lug to increase the area of contact that the seat and lug were lifted in the hoist cable support, improve the hoist cable and hold in the palm seat and lug complex stability of lifting. Moreover, the sling is not contacted with the outer surface of the lifting lug and can move in the sling clamping groove, so that the phenomenon of clamping between the sling and the lifting lug when the stress of the sling is overlarge in the hoisting process is avoided.

Further improved, the sling lifting seat is offset to one axial side of the anti-falling snap ring.

The beneficial effects are that: design like this, can avoid embedding hoist cable to hold in the palm the hoist seat in hoist cable to interfere with the anticreep snap ring better.

The anti-falling clamp ring is further improved and comprises a ring body and a clamping groove which is connected to one axial side of the ring body, the corresponding part of the ring body and the clamping groove enclose the body to form a sling lifting seat, and the sling clamping groove is enclosed by the end face of the ring body and the clamping groove.

The beneficial effects are that: by the design, the anti-falling clamp ring and the sling lifting seat can be separately processed, and the processing difficulty is reduced.

Further improved, the radial size of the ring body on one side of the lifting seat of the sling is larger than the rest positions on the ring body, so that a bulge part protruding to the center of the ring body is formed.

The beneficial effects are that: the radial dimension of the whole ring body is prevented from being larger and the weight of the ring body is prevented from being overlarge under the condition of ensuring the depth of the clamping groove of the hoisting cable.

Further improved, the bolt connecting seat is offset on the anti-falling clamping ring and is provided with one axial side of the hoisting rope supporting seat.

The beneficial effects are that: by the design, the stress of the lifting seat can be guaranteed to be perpendicular to the axis of the lifting lug, the anti-falling clamp ring is prevented from being inclined after the locking bolt is locked, the reliability is improved, and the occupied space of the lifting rope anti-falling device for the beam lifting lug of the pumping unit is reduced.

Further improve, the locking bolt only is equipped with one department, and the bolt connection seat sets up the both sides that carry on the back of the body at the anticreep snap ring respectively with hoist cable lifting seat.

The beneficial effects are that: by the design, when the sling lifting seat is positioned below the lifting lug, the bolt connecting seat is positioned between the slings at the two sides of the lifting lug, and when the sling lifting seat deflects, the sling is in blocking fit with the bolt connecting seat so as to prevent the sling lifting seat from continuously rotating.

Further improved, the top of the locking bolt is provided with an operation lug plate for operators to perform manual screwing operation.

The beneficial effects are that: design like this, the accessible directly rotates operation otic placode and rotates locking bolt, and is more convenient for use tool operation locking bolt.

The improved oil pumping unit walking beam lifting lug lifting rope anti-falling device further comprises an anti-falling rope, one end of the anti-falling rope is connected to the anti-falling clamping ring, the other end of the anti-falling rope is a sling connecting end, and the sling connecting end is provided with a sling connecting structure used for being connected to a sling.

The beneficial effects are that: the anti-falling rope is connected with the anti-falling clamp ring and the sling, so that the anti-falling clamp ring is prevented from falling off from the sling when in use and safety accidents are avoided.

The improved sling rope has the advantages that the sling rope connecting structure is a hook, and the hook is used for being detachably hung on a sling rope.

The beneficial effects are that: design like this, only will prevent that the one end of weighing down the rope is connected on the couple, just can realize being connected of anticreep snap ring and hoist cable, reduce installation steps, the operation of being convenient for.

Drawings

FIG. 1 is a state view of a prior art sling in operation;

FIG. 2 is a schematic structural view of the sling rope anti-drop device for the beam lifting lug of the pumping unit of the present invention;

fig. 3 is a state diagram of the hoist cable anti-drop device for the beam lifting lug of the pumping unit in fig. 2 in use.

In the figure: 11. lifting lugs; 12. a walking beam; 13. a sling; 14. an anti-drop snap ring; 15. a sling supporting seat; 16. a boss portion; 17. a sling clamping groove; 18. a bolt connecting seat; 19. locking the bolt; 20. preventing falling of the rope; 21. a notch edge; 22. operating the ear plate; 23. a ring body; 24. and (4) hanging hooks.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, which may be present, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, terms such as "comprises," "comprising," or any other variation thereof, which may be present, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrases "comprising an … …," or the like, do not exclude the presence of such elements, processes, or methods.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

The present invention will be described in further detail with reference to examples.

The utility model discloses an embodiment 1 of hoist cable anticreep device for beam-pumping unit walking beam lug:

beam-pumping unit is hoist cable anticreep device for beam-lifting lug is used for the cover to establish on the cylindrical lug 11 of walking beam 12, as shown in figure 1, lug 11 includes anticreep baffle and the bearing post that the level extends, and bearing post is used for the cover to establish hoist cable 13, and the anticreep baffle is located one side that bearing post kept away from beam 12, and the external diameter of anticreep baffle is greater than the external diameter of lug 11 to prevent that hoist cable 13 sideslips at hoist and mount in-process and drops.

As shown in fig. 2 and 3, the hoist cable anti-drop device for the pumping unit walking beam lifting lug comprises an anti-drop snap ring 14, wherein the inner diameter of the anti-drop snap ring 14 is larger than the outer diameter of an anti-drop baffle so as to ensure that the anti-drop snap ring 14 can be sleeved on the bearing column of the lifting lug 11. The anti-falling snap ring 14 comprises a ring body 23 and a clamping groove enclosing body connected to one axial side of the ring body 23, the cross section of the clamping groove enclosing body is L-shaped, and the corresponding part of the ring body 23 and the clamping groove enclosing body form a lifting rope supporting and lifting seat 15. The radial size of the ring body 23 on one side of the sling supporting seat 15 on the ring body 23 is larger than that of the rest positions, so as to form a convex part 16 protruding to the center of the ring body 23. The end face of the ring body 23 and the clamping groove enclosing body enclose a sling clamping groove 17 for the sling 13 to be embedded in, and the depth and the width of the sling clamping groove 17 are larger than the outer diameter of the sling 13, so that the sling 13 can be completely embedded in the sling clamping groove 17. The notch of hoist cable draw-in groove 17 is equipped with the arc wall that extends along anticreep snap ring 14 circumference along 21, and the curvature radius of arc wall, bellying 16 is the same with the curvature radius of the upright post that holds of lug 11 to make hoist cable lift seat 15 can laminate completely with the outer peripheral face of the upright post that holds of lug 11, increase hoist cable lift seat 15 and the area of contact of upright post, improve increase hoist cable lift seat 15 and lug 11 complex stability.

As shown in fig. 2 and 3, a bolt connecting seat 18 is disposed on the anti-falling snap ring 14, the bolt connecting seat 18 is offset from one axial side of the sling lifting seat 15 disposed on the anti-falling snap ring 14, and the bolt connecting seat 18 and the sling lifting seat 15 are disposed on two opposite sides of the anti-falling snap ring 14, respectively. The bolt connecting seat 18 is provided with a threaded hole extending along the radial direction of the anti-falling snap ring 14, the threaded hole is connected with a locking bolt 19 in a threaded manner, and the top end of the locking bolt 19 is provided with an operation lug plate 22 so that an operator can operate the locking bolt 19 conveniently. When the locking bolt 19 is screwed to be pressed against the outer peripheral surface of the lifting lug 11, the arc-shaped groove of the sling lifting seat 15 and the inner hole of the convex part are tightly attached to the lower surface of the lifting lug 11, and because the depth and the width of the sling clamping groove 17 are greater than the outer diameter of the sling 13, the outer periphery of the sling 13 is not in contact with the outer peripheral surface of the lifting lug 11, the sling 13 can move in the sling clamping groove 17, and the phenomenon that the sling 13 is clamped in the using process is avoided.

As shown in fig. 2 and 3, the hoist rope anti-drop device for the beam hanger of the pumping unit further includes an anti-drop rope 20. Prevent weighing down the one end of rope 20 and fix on anticreep snap ring 14, prevent weighing down the other end of rope 20 and be the hoist cable link end, the hoist cable linkage segment is equipped with hoist cable connection structure, and in this embodiment, hoist cable connection structure is couple 24, and couple 24 can clamp on hoist cable 13 to connect anticreep snap ring 14 on hoist cable 13, avoid coming off from hoist cable 13 at hoist and mount in-process anticreep snap ring 14.

Before the pumping unit walking beam 12 is lifted, the sling 13 is sleeved on the pumping unit lifting lug 11, a certain lifting force is applied to the sling 13, and the sling 13 is ensured to be attached to the lower peripheral surface of the lifting lug 11. Then, the anti-drop snap ring 14 is fitted over the lifting lug 11 with the sling holding base 15 positioned below, and the sling 13 is fitted into the sling engaging groove 17 of the sling holding base 15. Thereafter, the locking bolt 19 is tightened so that the inner bores of the rope lifting seat 15 and the boss 16 abut the lower surface of the lifting lug 11. Finally, the hook 24 of the fall prevention rope 20 is clipped to the sling 13.

After the lifting of the walking beam 12 is finished, before the sling 13 is not completely loosened, the dismounting work is carried out. And (3) rotating the locking bolt 19 to a certain gap with the outer peripheral surface of the lifting lug 11, enabling the bottom of the locking bolt 19 not to exceed the lifting rope supporting seat 15, detaching the hook 24 of the anti-falling rope 20, separating the anti-falling clamping ring 14 from the lifting rope 13, and taking down the anti-falling clamping ring 14.

The utility model discloses an among the hoist cable anticreep device for beam-pumping unit walking beam lug, be equipped with the hoist cable draw-in groove that is used for holding the hoist cable on the hoist cable lifting seat of anticreep snap ring, after the anticreep snap ring cover is on beam's lug, the hoist cable can imbed in the hoist cable draw-in groove, the locking bolt on the bolted connection seat of screwing makes the locking bolt roof pressure on the outer peripheral face of lug, so that the lower surface of laminating lug is followed to the notch of hoist cable draw-in groove, make the anticreep snap ring fix on the lug, drop from the lug when avoiding the hoist cable can't tighten the lug. In the hoist cable embedding hoist cable draw-in groove, the hoist cable is not with the surface contact of lug and can be at the hoist cable draw-in groove internalization to the dead phenomenon of card appears between hoist cable and the lug when avoiding hoist cable atress too big in the hoist and mount process. And the bolt connecting seat is positioned between the slings at the two sides of the lifting lug, if the anti-falling clamping ring rotates, the slings at the two sides can be in blocking fit with the bolt connecting seat so as to block the anti-falling clamping ring to continue rotating.

The utility model discloses an embodiment 2 of hanging rope anticreep device for beam-pumping unit walking beam lug:

the present example differs from example 1 in that: in embodiment 1, the notch edge 21 of the sling groove 17 is provided with an arc-shaped groove, and the arc-shaped groove is used for being matched and attached to the outer peripheral surface of the lifting lug 11. In this embodiment, the radius of curvature of the notch edge of the sling lifting seat is smaller than the radius of curvature of the lifting lug, and at this time, the inner holes of the sling lifting seat and the boss are in line contact with the outer surface of the lifting lug. Of course, the radius of curvature of the notch edge of the sling supporting seat can be larger than that of the lifting lug. In other embodiments, the notch edge of the sling lifting seat is a flat surface. In other embodiments, the sling clamping groove can be only used for embedding the sling part, and when the locking bolt is locked, the outer peripheral surface of the tight lifting lug is jacked, so that the sling lifting seat can press the sling to the sling, and the sling is tightly pressed on the outer peripheral surface of the lifting lug.

The utility model discloses an embodiment 3 of hanging rope anticreep device for beam-pumping unit walking beam lug:

this example differs from example 1 in that: in embodiment 1, the suspension wire lifting base 15 is offset to one axial side of the anti-drop snap ring 14. In this embodiment, the seat is lifted in the hoist cable support and the centering of anticreep snap ring is arranged, and at this moment, the anticreep snap ring has a certain interval with the seat is lifted to the hoist cable in the circumferencial direction, because hoist cable on the lug is the type of falling V structure, the hoist cable of lug both sides draws close each other to avoid the anticreep snap ring.

The utility model discloses an embodiment 4 of hanging rope anticreep device for beam-pumping unit walking beam lug:

this example differs from example 1 in that: in embodiment 1, the anti-drop snap ring 14 includes a ring body 23 and a clamping groove enclosing body connected to one axial side of the ring body 23, a corresponding portion of the ring body 23 and the clamping groove enclosing body form a sling lifting seat 15, and a sling clamping groove 17 is enclosed by an end surface of the ring body 23 and the clamping groove enclosing body. In this embodiment, the anticreep snap ring only includes the ring body, and the hoist cable lifts a welded fastening in anticreep snap ring's axial one side, and hoist cable lifts a self and has the hoist cable draw-in groove, and the hoist cable lifts a notch edge that has two axial interval arrangements along the anticreep snap ring promptly.

The utility model discloses an embodiment 5 of hanging rope anticreep device for beam-pumping unit walking beam lug:

the present example differs from example 1 in that: in embodiment 1, the radial dimension of the ring body 23 on the side of the ring body 23 on which the sling holding base 15 is provided is larger than the rest positions, so as to form the convex portion 16 protruding toward the center of the ring body 23. In this embodiment, the radial dimension of the ring body on the side of the sling supporting seat on the ring body is smaller than other positions to form a groove which is concave to the periphery of the ring body, and at the moment, the curvature radius of the groove is smaller than that of the sling clamping groove.

The utility model discloses an embodiment 6 of hanging rope anticreep device for beam-pumping unit walking beam lug:

the present example differs from example 1 in that: in embodiment 1, the bolt coupling seat 18 is offset from the axial side of the cable lifting seat 15 provided on the anti-slip snap ring 14. In this embodiment, the bolt-connecting seat is formed by a ring body.

The utility model discloses an embodiment 7 of hanging rope anticreep device for beam-pumping unit walking beam lug:

this example differs from example 1 in that: in embodiment 1, only one locking bolt 19 is provided, and the bolt connecting seat 18 and the sling lifting seat 15 are respectively provided on opposite sides of the anti-falling snap ring 14. In this embodiment, the bolt connecting seat is provided with two or more positions at intervals along the circumferential direction of the anti-drop snap ring, and one of the bolt connecting seat is arranged opposite to the cable lifting seat.

The utility model discloses an embodiment 8 of hanging rope anticreep device for beam-pumping unit walking beam lug:

this example differs from example 1 in that: in embodiment 1, the top of the lock bolt 19 is provided with an operation lug 22. In this embodiment, the locking bolt is a hexagon head bolt. In other embodiments, the locking bolt is operated by a tool.

The utility model discloses an embodiment 9 of hanging rope anticreep device for beam-pumping unit walking beam lug:

this example differs from example 1 in that: in embodiment 1, the hoist cable anticreep device for beam-pumping unit walking beam lug still includes prevents weighing down rope 20, prevents weighing down rope 20's one end and connects on anticreep snap ring 14, and the other end is the hoist cable link end, and the hoist cable link end is equipped with the hoist cable connection structure who is used for connecting on hoist cable 13, and hoist cable connection structure is couple 24. In this embodiment, both ends of preventing falling rope are the hoist cable link. In other embodiments, the sling attachment structure is a latch. In other embodiments, the anti-falling rope is a rope, a sling connecting structure is omitted, and two ends of the rope are tied to the sling and the anti-falling clamping ring respectively.

Finally, it should be noted that the above mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made in the technical solutions described in the foregoing embodiments without inventive effort, or some technical features may be substituted in the equivalent. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The sling anti-falling device for the beam lifting lug of the pumping unit is characterized by comprising an anti-falling clamping ring (14) sleeved on the lifting lug (11), wherein a sling lifting seat (15) is arranged on one radial side of the anti-falling clamping ring (14), and a sling clamping groove (17) for embedding a sling (13) is arranged on the sling lifting seat (15); one side of the anti-falling snap ring (14) back to the sling lifting seat (15) is provided with a bolt connecting seat (18), the bolt connecting seat (18) is provided with a threaded hole which is radially communicated along the anti-falling snap ring (14), the threaded hole is internally threaded with a locking bolt (19), and the locking bolt (19) is used for tightly jacking the outer peripheral surface of the lifting lug (11) when in locking so that the sling lifting seat (15) presses to the sling (13).

2. The sling rope anti-falling device for the pumping unit walking beam lifting lug according to claim 1, wherein the sling rope clamping groove (17) is provided with a notch edge (21) used for being supported at the bottom of the outer peripheral surface of the lifting lug (11), an arc-shaped groove is arranged on the notch edge (21) of the sling rope clamping groove (17), and the arc-shaped groove is used for being matched and attached to the outer peripheral surface of the lifting lug (11).

3. The sling anti-drop device for the pumping unit walking beam lifting lug according to claim 1 or 2, wherein the sling lifting seat (15) is offset to one axial side of the anti-drop snap ring (14).

4. The sling rope anti-dropping device for the pumping unit walking beam lifting lug according to claim 3, wherein the anti-dropping snap ring (14) comprises a ring body (23) and a clamping groove enclosing body connected to one axial side of the ring body (23), the corresponding part of the ring body (23) and the clamping groove enclosing body form the sling rope lifting seat (15), and the sling rope clamping groove (17) is enclosed by the end surface of the ring body (23) and the clamping groove enclosing body.

5. The sling anti-drop device for a pumping unit walking beam lifting lug according to claim 4, wherein the radial size of the ring body (23) on one side of the ring body (23) provided with the sling supporting seat (15) is larger than that of the rest positions so as to form a convex part (16) protruding to the center of the ring body (23).

6. The sling wire anti-falling device for the pumping unit walking beam lifting lug according to claim 3, wherein the bolt connecting seat (18) is offset to one axial side of the anti-falling clamping ring (14) on which the sling lifting seat (15) is arranged.

7. The sling wire anti-drop device for the pumping unit walking beam lifting lug according to claim 1 or 2, wherein the locking bolt (19) is provided with only one position, and the bolt connecting seat (18) and the sling lifting seat (15) are respectively arranged on two opposite sides of the anti-drop snap ring (14).

8. The sling anti-drop device for the pumping unit walking beam lifting lug according to claim 1 or 2, wherein an operation lug plate (22) for manual screwing operation of an operator is arranged at the top of the locking bolt (19).

9. The sling anti-drop device for the pumping unit walking beam lifting lug according to claim 1 or 2, further comprising an anti-drop rope (20), wherein one end of the anti-drop rope (20) is connected to the anti-drop snap ring (14), the other end of the anti-drop rope is a sling connecting end, and the sling connecting end is provided with a sling connecting structure for connecting to a sling (13).

10. The sling anti-drop device for a beam-pumping unit lifting lug according to claim 9, wherein the sling connecting structure is a hook (24), and the hook (24) is detachably hung on the sling (13).

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