CN116838267B - Lifting rope with extrusion-preventing device for pumping unit accessory - Google Patents
Lifting rope with extrusion-preventing device for pumping unit accessory Download PDFInfo
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- CN116838267B CN116838267B CN202311120281.XA CN202311120281A CN116838267B CN 116838267 B CN116838267 B CN 116838267B CN 202311120281 A CN202311120281 A CN 202311120281A CN 116838267 B CN116838267 B CN 116838267B
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- lifting rope
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- enclasping
- rod
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- 238000005086 pumping Methods 0.000 title claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 78
- 238000001125 extrusion Methods 0.000 claims abstract description 44
- 230000006835 compression Effects 0.000 claims abstract description 23
- 238000007906 compression Methods 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 241001023788 Cyttus traversi Species 0.000 claims description 54
- 238000009434 installation Methods 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/02—Rod or cable suspensions
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
A lifting rope with an anti-extrusion device for an oil pumping unit accessory relates to the technical field of oil pumping unit accessories, and comprises a horsehead and a lifting rope body, wherein mounting grooves are uniformly formed along the arc-shaped end face of the horsehead, and the anti-extrusion device is arranged in the mounting grooves; the extrusion-preventing device comprises a shell, a enclasping mechanism used for enclasping the lifting rope body is arranged in the shell, the enclasping mechanism comprises two arc enclasping sheets, two transmission rods and a transmission assembly, the arch back of each enclasping sheet is fixedly connected with a movable plugboard, the movable plugboard is inserted into the shell, the transmission assembly comprises two transmission gear sets, a compression rod and two ejector rods, the compression rod is positioned between the two enclasping sheets, the two transmission gear sets are positioned on two sides of the compression rod, the sliding of the compression rod is converted into the sliding of the ejector rods through the transmission of the transmission gear, the transmission rods are hinged on the shell, and the transmission rods drive the lever to drive the sliding of the ejector rods into the opposite sliding of the enclasping sheets, so that the lifting rope body is enclasped.
Description
Technical Field
The invention belongs to the technical field of pumping unit accessories, and particularly relates to a lifting rope with an anti-extrusion device for a pumping unit accessory.
Background
The beam pumping unit is the main oil extraction equipment at present, and the structure of beam pumping unit includes motor, reducing gear box, balancing weight, horse head, lifting rope body and polished rod eye, and wherein the lifting rope body has two, and lifting rope body coupling is between horse head and sucker rod, and the terminal surface of horse head is the arc to with the up-and-down swing of horse head change into the up-and-down motion of sucker rod.
One of common faults of the oil pumping unit is that the lifting rope body is extruded and deformed and then broken, and the extruded part is usually arranged on the lifting rope body at the upper part of the horsehead, because the lifting rope body at the lower part of the horsehead is in a vertical state in the upward swinging process of the horsehead, and the lifting rope body at the upper part of the horsehead is wound on the arc-shaped surface of the horsehead, and the lifting rope body is in an arc-shaped state; the lifting rope body in the vertical state bears downward pulling force, all the pulling force is the axial force of the lifting rope body, part of the pulling force borne by the lifting rope body in the arc state is the axial force of the lifting rope body, and the other part is the radial force of the lifting rope body, wherein the radial force can form radial extrusion on the lifting rope body, the radial extrusion enables the lifting rope body to deform, the roundness is greatly reduced, the strands of the lifting rope body after extrusion deformation are loose and have different lengths, and the lifting rope is easy to break after being subjected to pulling force for many times.
Disclosure of Invention
In order to solve the problem that a lifting rope body of an oil pumping unit is extruded, the invention provides a lifting rope with an anti-extrusion device, in the process of swinging up a horsehead, the lifting rope body is tightly held by the anti-extrusion device at the position just beyond the contact point of the horsehead and the lifting rope body, the tightly held force forms a pulling force along with the continued swinging up of the horsehead, the lifting rope body is pulled to ascend, the pulling force born by the lifting rope body above the anti-extrusion device is reduced, and therefore, the radial extrusion force which is converted from the pulling force is naturally reduced.
The technical scheme provided by the invention is as follows: the lifting rope comprises a horsehead and a lifting rope body, wherein the upper end of the lifting rope body is fixed on the upper part of the horsehead, the horsehead swings up and down to drive the lifting rope body to move up and down, mounting grooves are uniformly formed along the arc-shaped end face of the horsehead, and the anti-extrusion device is arranged in the mounting grooves; the extrusion-preventing device comprises a shell, two hollow grooves are formed in the shell, a group of enclasping mechanisms for enclasping the lifting rope body are arranged in each hollow groove, each group of enclasping mechanisms comprises two arc enclasping sheets, two transmission rods and a transmission assembly, arc openings of the two enclasping sheets are installed in opposite directions, a movable plugboard is fixedly connected to the arch back of each enclasping sheet, the movable plugboard moves with the enclasping sheets, when the two movable plugboards are close to each other, the two enclasping sheets are also close to each other, and vice versa; the movable plugboard is inserted into the shell in a sliding manner, the transmission assembly comprises two transmission gear sets, a pressing rod and two ejector rods, the pressing rod is positioned between the two holding pieces, after the lifting rope body bypasses the horsehead, namely, the lifting rope body above the tangent point can downwards press the pressing rod, the two transmission gear sets are respectively positioned at two sides of the pressing rod, each transmission gear set comprises two gears which are coaxially and synchronously rotated and are respectively called as a gear A and a gear B, racks are respectively machined on the sides of the pressing rod and the ejector rods, the two sides of the pressing rod are respectively meshed with the two gears A, when the pressing rod moves downwards, the two gears A are driven to rotate, the gears A are driven to rotate, and each gear B is respectively meshed with one ejector rod; the gear B rotates to drive the two ejector rods to slide in a direction away from each other; the transmission rods are hinged on the shell, one end of each transmission rod is matched with one movable plugboard, so that rotation of the two transmission rods is converted into sliding of the two movable plugboards, and the other end of each transmission rod is respectively matched with one ejector rod, so that sliding of the two ejector rods is converted into rotation of the two transmission rods; the lower ends of the two transmission rods are connected through a tension spring, and when the lifting rope body is separated from the compression bar below the tangent point, the tension spring has a shrinkage tendency, so that the two ejector rods slide towards the direction close to each other.
As an alternative scheme, the transmission assembly comprises a hydraulic chamber, a pressing rod and two ejector rods, wherein the pressing rod and the ejector rods are in sliding seal with the hydraulic chamber, and when the pressing rod is pressed down, the ejector rods synchronously extend out; otherwise, when the ejector rods synchronously shrink, the compression rods are ejected out; the compression bar is positioned between the two holding pieces.
The further technical scheme is as follows: the ejector rod is provided with a long hole A, a guide pin A is arranged in the long hole A, and the guide pin A is fixedly arranged with the shell, so that the ejector rod can slide relative to the shell; the compression bar is provided with a long hole B, a guide pin B is arranged in the long hole B, and the guide pin B is fixedly arranged with the shell, so that the compression bar can slide relative to the shell.
The further technical scheme is as follows: a long hole C is formed in the transmission rod above the hinge point of the transmission rod and the shell, a connecting pin is arranged in the long hole C, and the connecting pin is fixedly connected to the movable plugboard; a wheel groove is formed in the transmission rod below the hinging point of the transmission rod and the shell, a roller is arranged at the end part of the ejector rod matched with the transmission rod, and the roller is propped in the wheel groove; the distance from the hinge point of the transmission rod and the shell to the connecting pin is smaller than the distance from the hinge point of the transmission rod and the shell to the tangent point of the roller and the wheel groove.
The further technical scheme is as follows: the shell is transversely cut in the middle to form two half parts which are mirror symmetry, so that the installation of the enclasping mechanism is facilitated, and the two half parts are fixedly connected through bolts.
The further technical scheme is as follows: the upper end of the compression bar is a concave cambered surface, and the radius of the cambered surface is consistent with that of the lifting rope body.
The further technical scheme is as follows: the shell for inserting the movable plugboard is provided with an air pressure balance hole.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention discloses an anti-extrusion device, which comprises a plurality of anti-extrusion devices, wherein the plurality of anti-extrusion devices are arranged on the arc-shaped surface of a horsehead at equal intervals, in the process of swinging up the horsehead, the tangential point of the horsehead and a lifting rope body gradually moves downwards, two holding pieces of the anti-extrusion device below the tangential point are in an opening state and can not hold the lifting rope body tightly, and the two holding pieces of the anti-extrusion device above the tangential point can hold the anti-extrusion device tightly, and the holding force forms a pulling force along with the continuous swinging up of the horsehead to pull the lifting rope body upwards; each extrusion preventing device above the tangent point has a certain tensile force to the lifting rope body, and the tensile force is transmitted to different positions of the horsehead through each extrusion preventing device, so that the invention disperses the tensile force born by the lifting rope body on the arc-shaped horsehead, the tensile force born by each section of the arc-shaped lifting rope body after dispersion is reduced, and the component force towards the radial direction of the lifting rope body is naturally reduced, so that the lifting rope body cannot be extruded to deform.
In the process of the horsehead swinging, the tangential points of the horsehead and the lifting rope body gradually move upwards, and the extrusion preventing device above the tangential points is sequentially released to encircle the lifting rope body, so that the normal track of the lifting rope body is not influenced.
2. The power arm when the jacking rod jacks the transmission rod is larger than the resistance arm when the movable rod dials the movable plugboard, so that the smaller jacking force can firmly clamp the clamping piece on the lifting rope body, and the larger the clamping force is, the more reliable the force for pulling the lifting rope body upwards is.
Drawings
Fig. 1 is a schematic diagram of a horsehead.
Fig. 2 is a view of the horsehead of fig. 1 from a direction without the anti-extrusion device and the sling body.
Fig. 3 is a view of the horsehead of fig. 1, with the anti-extrusion device and the sling body mounted in the direction a.
Fig. 4 is a schematic structural view of a first embodiment of the anti-extrusion device of the present invention.
FIG. 5 is a schematic view showing the structure of a second embodiment of the anti-extrusion apparatus of the present invention
In the figure: 1. a mounting groove; 2. a rope hanging groove; 3. horsehead; 4. a lifting rope body; 5. an anti-extrusion device; 6. an air pressure balance hole; 7. a housing; 8. a transmission rod; 9. a roller; 10. wheel grooves; 11. a tension spring; 12. a push rod; 13. a gear B; 14. a gear A; 15. a compression bar; 16. a connecting pin; 17. a guide pin A; 18. tightly holding the sheet; 19. a movable plugboard; 20. a hydraulic chamber; 21. a long hole A; 22. a long hole B; 23. a guide pin B; 24. long hole C.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below 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 scope of the invention.
Referring to fig. 2, 3 and 4, the embodiment includes a horsehead 3 and a lifting rope body 4, wherein the upper end of the lifting rope body 4 is fixed on the upper portion of the horsehead 3, the horsehead 3 swings up and down to drive the lifting rope body 4 to move up and down, a plurality of mounting grooves 1 are uniformly formed along the arc-shaped end face of the horsehead 3, and an anti-extrusion device 5 is mounted in each mounting groove 1.
As shown in fig. 4, the anti-extrusion device 5 includes a housing 7, two hollow grooves are formed in the housing 7, a group of enclasping mechanisms for enclasping the lifting rope body 4 are arranged in each hollow groove, and in order to make the enclasping mechanisms easy to install, the housing 7 is transversely cut in the middle into two halves which are mirror symmetry, and the two half housings 7 are fixedly connected through bolts.
Each group of enclasping mechanism comprises two arc enclasping sheets 18, two transmission rods 8 and a transmission assembly. The radian radius of the enclasping sheets 18 is matched with the radius of the lifting rope body 4, the arc openings of the two enclasping sheets 18 are arranged in opposite directions, and the two enclasping sheets 18 can enclasp the lifting rope body 4 when being close to each other; a movable plugboard 19 is fixedly connected to the arch back of each holding piece 18, the movable plugboard 19 moves along with the holding pieces 18, when the two movable plugboards 19 are close to each other, the two holding pieces 18 are also close to each other, and vice versa; the movable plugboard 19 is inserted into the shell 7 in a sliding manner, the shell 7 into which the movable plugboard 19 is inserted is provided with an air pressure balance hole 6, the air pressure balance hole 6 balances the air pressure inside and outside the shell 7, and the movable plugboard 19 is ensured to be inserted and pulled out smoothly. The transmission assembly comprises two transmission gear sets, a pressing rod 15 and two ejector rods 12, wherein the pressing rod 15 is positioned between two holding pieces 18, after the lifting rope body 4 bypasses the horsehead 3, namely, the lifting rope body 4 above a tangent point can downwards press the pressing rod 15, the two transmission gear sets are respectively positioned at two sides of the pressing rod 15, each transmission gear set comprises two gears which are coaxially and synchronously rotated and are respectively called as a gear A14 and a gear B13, racks are respectively machined on the sides of the pressing rod 15 and the ejector rods 12, two sides of the pressing rod 15 are respectively meshed with the two gears A14, when the pressing rod 15 moves downwards, the two gears A14 are driven to rotate, the gear A14 is driven to rotate, each gear B13 is respectively meshed with one ejector rod 12, and the gears B13 are driven to slide in the mutual separation direction of the two ejector rods 12. The transmission rods 8 are hinged on the shell 7, one end of each transmission rod 8 is matched with one movable plugboard 19, so that rotation of the two transmission rods 8 is converted into sliding of the two movable plugboards 19, and the other end of each transmission rod 8 is respectively matched with one ejector rod 12, so that sliding of the two ejector rods 12 is converted into rotation of the two transmission rods 8. When the two push rods 12 slide away from each other, the two holding pieces 18 move close to each other by the lever principle, so that the lifting rope body 4 is held tightly.
In order to promote the cohesion force of the two cohesion sheets 18 to the lifting rope body 4 (namely, promote the pulling force to the lifting rope body 4), a long hole C24 is arranged on the transmission rod 8 above the hinging point of the transmission rod 8 and the shell 7, a connecting pin 16 is arranged in the long hole C24, and the connecting pin 16 is fixedly connected to the movable plugboard 19; a wheel groove 10 is formed in the transmission rod 8 below the hinging point of the transmission rod 8 and the shell 7, a roller 9 is arranged at the end part of a push rod 12 matched with the transmission rod 8, and the roller 9 is propped in the wheel groove 10; the distance from the hinge point of the transmission rod 8 and the shell 7 to the connecting pin 16 is smaller than the distance from the hinge point of the transmission rod 8 and the shell 7 to the tangent point of the roller 9 and the wheel groove 10; as is clear from the above, in the lever principle, the power arm is larger than the resistance arm, and therefore, the jack 12 can firmly hug the two hug pieces 18 with a small pushing force. After the holding piece 18 holds the lifting rope body 4 tightly, the holding force forms a pulling force along with the upper swing of the horsehead 3, and the lifting rope body 4 is pulled upwards. Each anti-extrusion device 5 above the tangent point has a certain tensile force to the lifting rope body 4, and the tensile force is transmitted to different positions of the horseheads 3 through each anti-extrusion device 5, so that the invention distributes the tensile force born by the lifting rope body 4 on the arc-shaped horseheads 3, and the tensile force born by each section of the lifting rope body 4 after the distribution is reduced, and the component force towards the radial direction of the lifting rope body 4 is naturally reduced, so that the lifting rope body 4 cannot be extruded to deform.
The lower ends of the two transmission rods 8 are connected through a tension spring 11, when the lifting rope body 4 is separated from the compression rod 15 below the tangent point, the tension spring 11 has a shrinkage trend, and the two ejector rods 12 slide towards the direction close to each other, so that in the process of swinging down the horsehead 3, the tangent point of the horsehead 3 and the lifting rope body 4 gradually moves upwards, and the extrusion preventing device 5 above the tangent point is sequentially released to encircle the lifting rope body 4, so that the normal track of the lifting rope body 4 is not influenced.
The ejector rod 12 is provided with three long holes A21, a guide pin A17 is arranged in each long hole A21, and the guide pin A17 is fixedly arranged with the shell 7, so that the ejector rod 12 can slide relative to the shell 7, the triangle has stability, and the embodiment ensures that the ejector rod 12 slides according to a linear track. If the width of the pressing lever 15 is smaller than the push rod 12 and the width dimension is insufficient to provide three long holes a21, one long hole B22 may be provided on the pressing lever 15, two or more guide pins B23 may be provided in the long hole B22, and the guide pins B23 are fixedly mounted with the housing 7, so that the pressing lever 15 slides linearly with respect to the housing 7.
The upper end of the pressure lever 15 is a concave cambered surface, the radius of the cambered surface is consistent with that of the lifting rope body 4, the contact area of the lifting rope body 4 for pressing the pressure lever 15 is increased, and the damage of the lifting rope body 4 or the pressure lever 15 is avoided.
In the working process of the embodiment, as shown in fig. 3, a plurality of extrusion preventing devices 5 are equidistantly arranged in an arc section of the horsehead 3, and arc-shaped lifting rope grooves 2 for accommodating the lifting rope bodies 4 are arranged on the horseheads 3 between adjacent extrusion preventing devices 5; when the horsehead 3 swings upwards, the point of tangency of the horsehead 3 and the lifting rope body 4 is lower, the lifting rope body 4 is not contacted with the horsehead 3 and the anti-extrusion device 5, the point of tangency of the horsehead 3 and the lifting rope body 4 is higher, the lifting rope body 4 is contacted with the horsehead 3 and the anti-extrusion device 5, wherein the two holding pieces 18 are in a mutually far-away state at the beginning of the contact with the anti-extrusion device 5, the compression bar 15 is at the uppermost end of the sliding position, the lifting rope body 4 enters between the two holding pieces 18 and presses the compression bar 15 downwards, the compression bar 15 downwards slides in a mutually far-away direction through the transmission of the transmission gear set, the two push rods 12 slide in a mutually far-away direction to push the lower end of the transmission bar 8 to swing, in the process of lever transmission, two enclasping sheets 18 are finally enclasped on the lifting rope body 4, along with the upswing of the horsehead 3, the enclasping force forms a pulling force, the lifting rope body 4 is pulled to ascend, and each anti-extrusion device 5 above the tangent point has a certain pulling force on the lifting rope body 4, and the pulling force is transmitted to different positions of the horsehead 3 through each anti-extrusion device 5, so that the pulling force born by the lifting rope body 4 on the arc-shaped horsehead 3 is dispersed, the born pulling force of each section of the lifting rope body 4 is reduced after dispersion, and the component force towards the radial direction of the lifting rope body 4 naturally becomes smaller, so that the lifting rope body 4 cannot be extruded to deform.
In the second embodiment, referring to fig. 2, 3 and 5, the structure of the transmission assembly is different from that of the first embodiment, the transmission assembly of the present embodiment includes a hydraulic chamber 20, a compression bar 15 and two ejector rods 12, where the compression bar 15 and the ejector rods 12 are slidably sealed with the hydraulic chamber 20, and when the compression bar 15 is pressed down, the ejector rods 12 extend synchronously; conversely, when the ejector rods 12 are synchronously contracted, the compression rods 15 are ejected. The compression bar 15 is located between the two holding pieces 18, and the ends of the two ejector rods 12 are matched with the lower end of the transmission rod 8, so that the sliding of the two ejector rods 12 is converted into the swinging of the transmission rod 8.
Claims (7)
1. The utility model provides a lifting rope that beam-pumping unit accessory has extrusion device of preventing, includes horse head (3) and lifting rope body (4), and the upper end of lifting rope body (4) is fixed in the upper portion of horse head (3), and the up-and-down motion of lifting rope body (4) is driven in the up-and-down swing of horse head (3), its characterized in that: the device comprises a horse head (3) and a squeezing prevention device (5), wherein the horse head (3) is provided with a mounting groove (1) along the arc-shaped end surface uniformly;
the extrusion-preventing device (5) comprises a shell (7), two hollow grooves are formed in the shell (7), a group of enclasping mechanisms for enclasping the lifting rope body (4) are arranged in each hollow groove, each group of enclasping mechanisms comprises two arc enclasping pieces (18), two transmission rods (8) and a transmission assembly, arc openings of the two enclasping pieces (18) are installed in opposite directions, a movable plugboard (19) is fixedly connected to the arch back of each enclasping piece (18), the movable plugboard (19) is inserted into the shell (7) in a sliding manner, the transmission assembly comprises two transmission gear sets, a pressing rod (15) and two ejector rods (12), the pressing rod (15) is positioned between the two enclasping pieces (18), the two transmission gear sets are respectively positioned at two sides of the pressing rod (15), each transmission gear set comprises two gears which are respectively called a gear A (14) and a gear B (13), the sides of the pressing rod (15) and the ejector rods (12) are respectively meshed with the two gears A (14) and the two gears B (12); the transmission rods (8) are hinged to the shell (7), one end of each transmission rod (8) is matched with one movable plugboard (19), so that rotation of the two transmission rods (8) is converted into sliding of the two movable plugboards (19), the other end of each transmission rod (8) is respectively matched with one ejector rod (12), sliding of the two ejector rods (12) is converted into rotation of the two transmission rods (8), and the lower ends of the two transmission rods (8) are connected through one tension spring (11).
2. A lifting rope with an anti-extrusion device for a pumping unit accessory according to claim 1, wherein: alternatively, the transmission assembly comprises a hydraulic chamber (20), a pressing rod (15) and two ejector rods (12), wherein the pressing rod (15) and the ejector rods (12) are in sliding sealing with the hydraulic chamber (20), and the pressing rod (15) is positioned between the two holding pieces (18).
3. A lifting rope with an anti-extrusion device for a pumping unit accessory according to claim 1, wherein: the ejector rod (12) is provided with a long hole A (21), a guide pin A (17) is arranged in the long hole A (21), and the guide pin A (17) is fixedly arranged with the shell (7), so that the ejector rod (12) can slide relative to the shell (7); the compression bar (15) is provided with a long hole B (22), a guide pin B (23) is arranged in the long hole B (22), and the guide pin B (23) is fixedly arranged with the shell (7), so that the compression bar (15) can slide relative to the shell (7).
4. A lifting rope with an anti-extrusion device for a pumping unit accessory according to claim 1, wherein: a long hole C (24) is arranged on the transmission rod (8) above the hinge point of the transmission rod (8) and the shell (7), a connecting pin (16) is arranged in the long hole C (24), and the connecting pin (16) is fixedly connected to the movable plugboard (19); a wheel groove (10) is formed in the transmission rod (8) below the hinging point of the transmission rod (8) and the shell (7), a roller (9) is arranged at the end part of the ejector rod (12) matched with the transmission rod (8), and the roller (9) is propped in the wheel groove (10); the distance from the hinge point of the transmission rod (8) and the shell (7) to the connecting pin (16) is smaller than the distance from the hinge point of the transmission rod (8) and the shell (7) to the tangent point of the roller (9) and the wheel groove (10).
5. A lifting rope with an anti-extrusion device for a pumping unit accessory according to claim 1, wherein: the shell (7) is transversely cut into two half parts which are mirror symmetry in the middle, so that the installation of the enclasping mechanism is convenient, and the two half parts of the shell (7) are fixedly connected through bolts.
6. A lifting rope with an anti-extrusion device for a pumping unit accessory according to claim 1, wherein: the upper end of the compression bar (15) is a concave cambered surface, and the radius of the cambered surface is consistent with that of the lifting rope body (4).
7. A lifting rope with an anti-extrusion device for a pumping unit accessory according to claim 1, wherein: the shell (7) for inserting the movable plugboard (19) is provided with an air pressure balance hole (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311120281.XA CN116838267B (en) | 2023-09-01 | 2023-09-01 | Lifting rope with extrusion-preventing device for pumping unit accessory |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311120281.XA CN116838267B (en) | 2023-09-01 | 2023-09-01 | Lifting rope with extrusion-preventing device for pumping unit accessory |
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| CN116838267A CN116838267A (en) | 2023-10-03 |
| CN116838267B true CN116838267B (en) | 2023-11-14 |
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