Planet wheel type sucker rod cam hydraulic tong back-up tong

Abstract

The utility model discloses a planet wheel type sucker rod cam hydraulic clamp back-up clamp, which relates to the technical field of petroleum equipment and comprises a base and a rotating frame. The first base rotating clamping table and the second base rotating clamping table are arranged on the upper portion and the lower portion of the inner end of the base respectively. The first rotating frame clamping table and the second rotating frame clamping table are arranged on the upper portion and the lower portion of the rotating frame respectively, and a gap is formed between the two to form an open cavity. The at least two convex claw clamping parts are rotationally connected into the open cavity through a rotating pin shaft; the convex claw clamping part comprises a convex claw and a convex claw gear which are connected in series through a rotating pin shaft, and a bolt arranged between the convex claw and the convex claw gear; the base gear ring is arranged at the inner ring of the first base rotary clamping table and is meshed with the convex claw gear; the arc-shaped rack is arranged on the periphery of the rotating frame and located above the first base rotating clamping table. Compared with the prior art, the sucker rod rotating frame has the advantages that the whole sucker rod rotating frame is convenient to disassemble and assemble by optimizing the connecting mode of the rotating frame and the base, and the protruding claws can be rapidly replaced so as to be matched with sucker rods of different sizes and specifications.

Description

Technical Field

[0001] The utility model belongs to the technical field of petroleum equipment, and in particular relates to a planetary wheel type sucker rod cam hydraulic tong back-up tong. Background Art

[0002] The power tongs used in sucker rod operations usually include a main tong and a backup tong. The main tong often drives one section of the sucker rod to rotate, and the backup tong often clamps and fixes the other section of the sucker rod to achieve corresponding pipe loading and unloading operations.

[0003] CN2620077Y discloses a sucker rod inverted hydraulic power tongs, which specifically drives the claws to deflect to clamp the sucker rods, but does not involve the overall structure of the arrangement, the installation of the claws and the claw gears, and due to the differences in the diameters of the sucker rods, it is necessary to replace the claws or limit their deflection range to prevent the deformation of the outer wall of the sucker rod caused by excessive force. These contents are not disclosed and solved in the above patents. Utility Model Content

[0004] The utility model discloses a planetary wheel type sucker rod cam hydraulic tongs back-up tongs, comprising: a base and a rotating frame both having an opening structure, the rotating frame being embedded in the base, and the two being rotatably connected; and further comprising:

[0005] A first base rotating clamping table and a second base rotating clamping table are respectively arranged at the upper and lower parts of the inner end of the base;

[0006] The first rotating frame card platform and the second rotating frame card platform are respectively arranged at the upper and lower parts of the rotating frame, and a gap is provided between the two to form an open cavity; the first rotating frame card platform is rotatably abutted against the first base rotating card platform and / or the second rotating frame card platform is rotatably abutted against the second base rotating card platform;

[0007] At least two cam clamping parts are rotatably connected in the open cavity through a rotating pin shaft; the cam clamping part comprises a cam and a cam gear connected in series through a rotating pin shaft, and a latch is provided between the cam and the cam gear;

[0008] A base gear ring, disposed in the base, located between the first base rotating clamping table and the second base rotating clamping table, and meshing with the pawl gear;

[0009] An arc-shaped rack, arranged on the outer periphery of the rotating frame and located above the first base rotating clamping table;

[0010] An engagement opening is provided on the base and is located above the rotating clamping table of the first base;

[0011] A rotating gear meshes with the arc-shaped rack through a meshing opening;

[0012] The rotation driving and limiting mechanism is used to drive the rotating gear to rotate forward and reverse respectively and to limit the rotation arc range of the arc-shaped rack.

[0013] In some embodiments, it further comprises:

[0014] The cover has an opening structure and is fixed on the base, and is arranged above the arc-shaped rack.

[0015] In some embodiments, it further comprises:

[0016] A locking bolt is arranged on the top of the cover and is threadedly connected thereto, and the lower end of the locking bolt is brought into contact with or separated from the first rotating frame clamping platform by rotation.

[0017] In some embodiments, the rotational drive comprises:

[0018] A linkage gear, coaxially connected to the rotating gear;

[0019] A sliding cylinder having a transmission opening on one side thereof;

[0020] A first piston head and a second piston head are slidably arranged in the sliding cylinder on both sides of the transmission opening;

[0021] A reciprocating rack is disposed between the first piston head and the second piston head, and the reciprocating rack is meshed with the linkage gear through the transmission opening;

[0022] In some embodiments, guide ports are provided on both sides of the sliding cylinder.

[0023] In some embodiments, the limiting mechanism includes:

[0024] A pin hole is arranged at the outer end of the first piston head and / or the second piston head, and is provided with a positioning pin. The length of the positioning pin is set to limit the travel range of the reciprocating rack, thereby limiting the rotation arc range of the arc-shaped rack.

[0025] In some embodiments, the limiting mechanism includes:

[0026] An arc-shaped slideway is provided on the first rotating frame clamping table;

[0027] The limiting pin is arranged on the top of the cover, and the lower end of the limiting pin is embedded in the arc-shaped slide groove. The arc length of the arc-shaped slide groove is set to limit the rotation arc range of the arc-shaped rack.

[0028] In some embodiments, the inner end clamping portion of the protruding claw is an arc-shaped structure and is provided with a clamping tooth groove.

[0029] In some embodiments, the base gear ring is located at the inner ring of the first base rotation card table; the outer diameter of the first rotation frame card table is larger than the inner diameter of the base gear ring; the inner diameter of the base gear ring is larger than the outer diameter of the second rotation frame card table; the outer diameter of the second rotation frame card table is larger than the inner diameter of the second base rotation card table.

[0030] In some embodiments, the number of the protruding claw clamping portions is three.

[0031] In some embodiments, the dog gear is located above the dog.

[0032] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0033] 1. By optimizing the connection structure between the rotating frame and the base, not only the rotation transmission mode between the two is made more reliable, but also the rotating frame can be quickly removed; the connection setting mode of the cam and the cam gear is simple and reliable, and the two are deflected by the joint action of the rotating pin and the connecting pin. When disassembly is required, the rotating pin and the connecting pin can be quickly pulled out to complete the separation of the two, and then the appropriate cam can be selected to adapt to different calibers of oil pumping pipes.

[0034] 2. While the claws are replaced by quick disassembly, the deflection range of the claws is further limited by a limit mechanism, thereby ensuring that the sucker rod is not subjected to excessive squeezing force to affect the rigid structure of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0036] Figure 1 It is a three-dimensional structural schematic diagram of the rotating frame of the utility model.

[0037] Figure 2 It is a three-dimensional structural schematic diagram of the base of the utility model.

[0038] Figure 3 It is a three-dimensional structural schematic diagram of the arc-shaped rack of the utility model.

[0039] Figure 4 It is a three-dimensional structural schematic diagram of the cover top of the utility model.

[0040] Figure 5 It is a schematic diagram of the internal structure of the sliding cylinder of the utility model.

[0041] Description of the drawings: rotating frame 1, opening 2, cam 3, clamping tooth groove 4, cam gear 5, rotating pin 6, connecting pin 7, arc rack 8, base 9, base gear ring 10, cover top 11, locking bolt 12, rotating gear 13, linkage gear 14, sliding cylinder 15, opening 16, first piston head 17, second piston head 18, reciprocating rack 19, pin hole 20, guide port 21, first base rotating clamping table 22, second base rotating clamping table 23, first rotating frame clamping table 24, second rotating frame clamping table 25, meshing opening 26. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described and illustrated in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. Based on the embodiments provided by the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0043] Obviously, the drawings described below are only some examples or embodiments of the utility model. For ordinary technicians in this field, the utility model can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed by the utility model, some changes in design, manufacturing or production based on the technical content disclosed by the utility model are just conventional technical means, and should not be understood as the content disclosed by the utility model is insufficient.

[0044] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present invention may be combined with other embodiments without conflict.

[0045] The planetary wheel type sucker rod cam hydraulic tongs back-up tongs include: a base 9 and a rotating frame 1 both of which have an opening structure, the rotating frame 1 is embedded in the base 9, and the two are rotatably connected; it also includes: a first base rotating clamping table 22, a second base rotating clamping table 23, a first rotating frame clamping table 24, a second rotating frame clamping table 25, a claw clamping portion, an arc-shaped rack 8, and a base gear ring 10.

[0046] Specifically, the first base rotating card table 22 and the second base rotating card table 23 are respectively arranged at the upper and lower parts of the inner end of the base 9; the first rotating frame card table 24 and the second rotating frame card table 25 are respectively arranged at the upper and lower parts of the rotating frame 1, and a gap is provided between the two to form an opening 2; the first rotating frame card table 24 is rotationally abutted against the first base rotating card table 22 and / or the second rotating frame card table 25 is rotationally abutted against the second base rotating card table 23; at least two cam clamping parts are provided, and three are provided in this embodiment, wherein each cam clamping part is rotationally connected to the opening 2 through a rotating pin 6; the cam clamping part includes cams connected in series through a rotating pin 6 The base gear ring 10 is provided in the base 9 and is located between the first base rotating card table 22 and the second base rotating card table 23, and is meshed with the claw gear 5; the arc-shaped rack 8 is provided on the outer periphery of the rotating frame 1 and is located above the first base rotating card table 24; the base gear ring 10 is located at the inner ring of the first base rotating card table 22; the outer diameter of the first rotating frame card table 24 is larger than the inner diameter of the base gear ring 10; the inner diameter of the base gear ring 10 is larger than the outer diameter of the second rotating frame card table 25; the outer diameter of the second rotating frame card table 25 is larger than the inner diameter of the second base rotating card table 23.

[0047] The above-mentioned setting method can realize the rapid replacement of the cam 3. The arc-shaped rack 8 is arranged at the uppermost end of the rotating frame 1. Due to the structural position and size setting among the base gear ring 10, the first base rotating clamping table 22, the second base rotating clamping table 23, and the first rotating frame clamping table 24, the rotating frame 1 can be quickly removed as a whole. After removal, first take out the rotating pin 6, and then take out the latch 7 to quickly realize the separation of the cam 3, and replace the cam 3 with the required matching sucker rod.

[0048] After installation is completed, the arc rack 8 is driven to rotate forward and reversely, thereby driving the rotating frame 1 to rotate. Under the meshing of the base ring gear 10 and the pawl gear 5, the pawl 3 swings with the pawl gear 5, thereby achieving a clamping effect.

[0049] In some embodiments, it also includes: a rotating gear 13, an engaging opening 26, a rotating drive and a limiting mechanism; the engaging opening 26 is opened on the base 9 and is located above the first base rotating card table 24; the rotating gear 13 is engaged with the arc-shaped rack 8 through the engaging opening; the rotating drive and the limiting mechanism are respectively used to drive the rotating gear 13 to rotate forward and reverse and limit the rotation arc range of the arc-shaped rack 8.

[0050] Through the above arrangement, the overall structure of the equipment is made more compact, and a cover 11 is further provided on the top to protect the corresponding structure from the influence of the external environment. Specifically, the cover 11 has an opening structure and is fixed on the base 9, and is covered above the arc-shaped rack 8.

[0051] At the same time, a locking bolt 12 can be added to limit the movement of the rotating frame 1. Specifically, the locking bolt 12 is arranged on the cover top 11 and threadedly connected thereto, and the lower end of the locking bolt 12 is rotated to abut against or separate from the first rotating frame clamping platform 24.

[0052] In some embodiments, the rotary drive includes: a linkage gear 14, a sliding cylinder 15, a first piston head 17, a second piston head 18, and a reciprocating rack 19; the linkage gear 14 is coaxially connected to the rotary gear 13; the sliding cylinder 15 has a transmission opening 16 on one side; the first piston head 17 and the second piston head 18 are slidably arranged in the sliding cylinder 15 on both sides of the transmission opening 16; the reciprocating rack 19 is arranged between the first piston head 17 and the second piston head 18, and the reciprocating rack 19 is meshed with the linkage gear 14 through the transmission opening 16;

[0053] The left chamber and the right chamber are formed between the two piston heads and the sliding cylinder 15, and the two piston heads are connected by the reciprocating rack 19. It should be noted that the first piston head 17 and the second piston head 18 cannot move to the transmission opening 16 to prevent the left chamber and the right chamber from being depressurized, thereby failing to achieve the reciprocating motion of the reciprocating rack 19. Specifically, guide ports 21 are provided on both sides of the sliding cylinder 15. The guide ports can be connected to an external air source or hydraulic source, thereby pushing the first piston head 17 and the second piston head 18 to move.

[0054] In some embodiments, the limiting mechanism includes: a pin hole 20, which is arranged at the outer end of the first piston head 17 and / or the second piston head 18, and is provided with a positioning pin. The length of the positioning pin is set to limit the travel range of the reciprocating rack 19, thereby limiting the rotation arc range of the arc rack 8.

[0055] In this embodiment, the limiting mechanism is arranged on the first piston head 17 and / or the second piston head 18, and the movement stroke of the first piston head 17 and / or the second piston head 18 is limited by setting a positioning pin, so as to play a positioning role when the pawl 3 is extended or retracted.

[0056] In some embodiments, the limiting mechanism includes: an arc-shaped slide groove and a limiting pin; the arc-shaped slide groove is arranged on the first rotating frame clamping platform 24; the limiting pin is arranged on the cover top 11, and its lower end is embedded in the arc-shaped slide groove, and the arc segment length of the arc-shaped slide groove is set to limit the rotation arc range of the arc rack 8.

[0057] In this embodiment (not shown), the length of the arc-shaped slide groove is used for limitation, but the impact force on the limit pin shaft is relatively large after long-term use, which is insufficient compared to the limitation method of the positioning pin. However, its advantage is that the setting is simpler and more convenient.

[0058] In some embodiments, the inner end clamping portion of the protruding claw 3 is an arc-shaped structure and is provided with a clamping tooth groove 4 .

[0059] In some embodiments, the number of the claw clamping portions is three.

[0060] In some embodiments, the dog gear 5 is located above the dog 3. The dog gear 5 is equivalent to a transmission component, and being arranged at the top can reduce the friction force, thereby reducing wear.

[0061] How it works:

[0062] An air source or a hydraulic source is injected into the left and right chambers of the sliding cylinder 15 through the guide port 21, thereby driving the reciprocating rack 19 to reciprocate at the transmission opening 16, so as to drive the rotating gear 13 to rotate, and finally drive the rotating frame 1 to rotate, and then the base ring gear 10 is meshed with the pawl gear 5, and the pawl 3 swings with the pawl gear 5, thereby achieving the clamping effect.

[0063] By arranging a positioning pin in the pin hole 20 , the deflection range of the rotating frame 1 is limited, and the two extreme ends of the deflection range are a clamping state and a retracted state.

[0064] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Planetary wheel type sucker rod cam hydraulic tongs back-up tongs, including: A base and a rotating frame both have an open structure, the rotating frame is embedded in the base, and the two are rotatably connected; characterized in that it also includes: A first base rotating clamping table and a second base rotating clamping table are respectively arranged at the upper and lower parts of the inner end of the base; The first rotating frame card platform and the second rotating frame card platform are respectively arranged at the upper and lower parts of the rotating frame, and a gap is provided between the two to form an open cavity; the first rotating frame card platform is rotatably abutted against the first base rotating card platform and / or the second rotating frame card platform is rotatably abutted against the second base rotating card platform; At least two cam clamping parts are rotatably connected in the open cavity through a rotating pin shaft; the cam clamping part comprises a cam and a cam gear connected in series through a rotating pin shaft, and a latch is provided between the cam and the cam gear; A base gear ring, provided at the inner ring of the first base rotating clamping table and meshing with the pawl gear; An arc-shaped rack, arranged on the outer periphery of the rotating frame and located above the first base rotating clamping table; The outer diameter of the first rotating frame table is larger than the inner diameter of the base gear ring; the inner diameter of the base gear ring is larger than the outer diameter of the second rotating frame table; the outer diameter of the second rotating frame table is larger than the inner diameter of the second base rotating table.

2. The planetary wheel type sucker rod cam hydraulic tongs backup tongs according to claim 1, characterized in that: Also includes: An engagement opening is provided on the base and is located above the rotating clamping table of the first base; A rotating gear meshes with the arc-shaped rack through a meshing opening; The rotation driving and limiting mechanism is used to drive the rotating gear to rotate forward and reverse and to limit the rotation arc range of the arc-shaped rack respectively.

3. The planetary wheel type sucker rod cam hydraulic tongs backup tongs according to claim 2, characterized in that: Also includes: The cover has an opening structure and is fixed on the base, and is arranged above the arc-shaped rack.

4. The planetary wheel type sucker rod cam hydraulic tongs backup tongs according to claim 3, characterized in that: Also includes: A locking bolt is arranged on the top of the cover and is threadedly connected thereto, and the lower end of the locking bolt is brought into contact with or separated from the first rotating frame clamping platform by rotation.

5. The planetary wheel type sucker rod cam hydraulic tongs backup tongs according to claim 2, characterized in that: The rotary drive comprises: A linkage gear, coaxially connected to the rotating gear; A sliding cylinder having a transmission opening on one side thereof; A first piston head and a second piston head are slidably arranged in the sliding cylinder on both sides of the transmission opening; A reciprocating rack is disposed between the first piston head and the second piston head, and the reciprocating rack is meshed with the linkage gear through the transmission opening.

6. The planetary wheel type sucker rod cam hydraulic tongs backup tongs according to claim 5, characterized in that: Guide ports are arranged on both sides of the sliding cylinder.

7. The planetary wheel type sucker rod cam hydraulic tongs backup tongs according to claim 5, characterized in that: The limiting mechanism comprises: A pin hole is arranged at the outer end of the first piston head and / or the second piston head, and is provided with a positioning pin. The length of the positioning pin is set to limit the travel range of the reciprocating rack, thereby limiting the rotation arc range of the arc-shaped rack.

8. The planetary wheel type sucker rod cam hydraulic tongs backup tongs according to claim 3, characterized in that: The limiting mechanism comprises: An arc-shaped slideway is provided on the first rotating frame clamping table; The limiting pin is arranged on the top of the cover, and the lower end of the limiting pin is embedded in the arc-shaped slide groove. The arc length of the arc-shaped slide groove is set to limit the rotation arc range of the arc-shaped rack.

9. The planetary wheel type sucker rod cam hydraulic tongs backup tongs according to claim 1, characterized in that: The inner end clamping portion of the protruding claw is an arc-shaped structure and is provided with clamping tooth grooves.

10. The planetary wheel type sucker rod cam hydraulic tongs backup tongs according to claim 1, characterized in that: The dog gear is located above the dog.

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