CN220133925U - Three jaw back-ups clamping mechanism of power tongs swing for oil field pipe - Google Patents
Three jaw back-ups clamping mechanism of power tongs swing for oil field pipe Download PDFInfo
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- CN220133925U CN220133925U CN202322919554.9U CN202322919554U CN220133925U CN 220133925 U CN220133925 U CN 220133925U CN 202322919554 U CN202322919554 U CN 202322919554U CN 220133925 U CN220133925 U CN 220133925U
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- tong
- upper jaw
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- 230000007246 mechanism Effects 0.000 title claims abstract description 15
- 230000000712 assembly Effects 0.000 claims abstract description 18
- 238000000429 assembly Methods 0.000 claims abstract description 18
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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Abstract
The utility model provides a back-up tong clamping mechanism of a power tong swinging three-jaw plate for an oilfield pipe, wherein a back-up tong head main body is positioned between an upper jaw plate frame and a lower jaw plate frame, an opening is arranged on the back-up tong head main body, and the upper jaw plate frame and the lower jaw plate frame are fastened into a whole through a supporting shaft; three swing jaw plate assemblies are arranged between the upper jaw plate frame and the lower jaw plate frame, the swing jaw plate assemblies are arranged in swing shaft holes on the upper jaw plate frame and the lower jaw plate frame through swing shafts, and the swing jaw plate assemblies, the swing shafts, the upper jaw plate frame and the lower jaw plate frame form a fixed hinge swing pair; the inner side of the back-up wrench head main body is provided with three groups of sloping surfaces, the symmetrical center of each group of sloping surfaces is provided with a holding arc groove, one swing jaw plate assembly is arranged at one group of sloping surfaces on the inner side of the back-up wrench head main body, and the roller wheels are positioned in the corresponding holding arc grooves when in the initial position. The three swing jaw plate assemblies simultaneously move towards the center, so that three groups of clamp teeth simultaneously clamp a tubular column, the clamping is reliable, the structure is stable, and the damage to the tubular column is reduced.
Description
Technical Field
The utility model relates to a hydraulic power clamp, in particular to a back-up clamp of a power clamp for an oilfield pipe, and belongs to the technical field of petroleum equipment manufacturing.
Background
In the screwing-on and screwing-off of oil pipes, casings and drill pipe threads of oilfield wellhead, in order to make the threaded connection of the pipe columns convenient to assemble and disassemble and good in stability, a power clamp for a pipe is usually used, and the power clamp consists of a main clamp and a back-up clamp, wherein the main clamp plays a role in clamping and rotating screwing-off, and the back-up clamp plays a role in clamping and fixing a connecting pipe. The clamping mode of the traditional power tongs back tongs for the oilfield pipe is generally realized by adopting two swing type jaw plates to clamp and two radial translation sliding jaw plates to clamp, and the two back tongs head clamping mechanisms are few in clamping points and are easy to damage a pipe column. The prior patent number 201320118881.8 is a back-up tong clamping mechanism of a power tong for oilfield pipes, which can realize the clamping of three tong teeth to a pipe column, has reliable clamping and reduces damage to the pipe column, but people find that the structure comprises radial translation sliding jaw plates which can extend out a lot when clamping small pipe diameters, the jaw plates can droop when extending out a lot due to self weight, and the acting force on limit surfaces on two sides is very large, so the clamping performance and the service life are seriously influenced, and the clamping mode of the clamping mechanism is further improved, so that the stability and the service life of the whole power tong are increased on the basis of uniform pipe column clamping force, difficult pipe wall damage and long tong tooth service life.
Disclosure of Invention
The utility model provides a back-up tong clamping mechanism of a power tong swinging three-jaw plate for an oilfield pipe, which aims to solve the defects in the prior art, ensure that the back-up tong clamping mechanism clamps more reliably and reduce the damage to a pipe column.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a three jaw back-up tong clamping mechanism of power tong swing for oil field pipe, includes back-up tong main part, back-up tong head main part, upper jaw grillage, lower jaw grillage, back-up shaft, swing jaw plate assembly, extension spring, actuating cylinder, pivot I, pivot II, back-up tong head main part is located between upper jaw plate frame and the lower jaw plate frame, is equipped with the opening on its back-up tong head main part, and upper jaw plate frame and lower jaw plate frame pass through the back-up shaft to be fastened in an organic whole, back-up tong head main part is fixed on the back-up tong main part; three swing jaw plate assemblies are arranged between the upper jaw plate frame and the lower jaw plate frame, the swing jaw plate assemblies are arranged in swing shaft holes on the upper jaw plate frame and the lower jaw plate frame through swing shafts, and the swing jaw plate assemblies, the swing shafts, the upper jaw plate frame and the lower jaw plate frame form a fixed hinge swing pair; the swing jaw plate assembly comprises a jaw plate, clamp teeth, rollers, roller shafts and a swing shaft, wherein one end of the jaw plate is provided with a swing shaft hole, the outer side of the other end of the jaw plate is provided with the roller shaft hole, and the inner side of the jaw plate is provided with a clamp tooth slot; the upper jaw plate frame and the lower jaw plate frame are provided with three groups of corresponding swing shaft holes.
The inner side of the back-up wrench head main body is provided with three groups of sloping surfaces, the symmetrical center of each group of sloping surfaces is provided with a holding arc groove, one swing jaw plate assembly is arranged at one group of sloping surfaces on the inner side of the back-up wrench head main body, and the roller wheels of the swing jaw plate assembly are positioned in the corresponding holding arc grooves when in an initial position; the central section of one group of sloping surfaces coincides with the central section of the opening of the main body of the back-up wrench head, and the other two groups of sloping surfaces are symmetrically distributed on two sides of the central section of the opening of the main body of the back-up wrench head.
The swing jaw plate assembly is provided with a tension spring, one end of the tension spring is fixed on the jaw plate, and the other end of the tension spring is fixed on the upper jaw plate frame.
And the clamp teeth on the three swing jaw plate assemblies are symmetrical along the central section of the opening of the back-up clamp head main body when the pipe column is clamped.
Preferably, the three groups of swing shaft holes on the upper jaw plate frame and the lower jaw plate frame are arranged on the right side of the central section of the opening of the upper jaw plate frame and the lower jaw plate frame, and the other group of swing shaft holes is arranged on the left side of the opening of the upper jaw plate frame and the lower jaw plate frame.
Preferably, the three groups of swing shaft holes on the upper jaw plate frame and the lower jaw plate frame are arranged on the left side of the central section of the opening of the upper jaw plate frame and the lower jaw plate frame, and the other group of swing shaft holes is arranged on the right side.
The driving oil cylinder is fixed on the back-up wrench main body through one end of a pivot I, and the other end of the driving oil cylinder is fixed on the upper jaw plate frame through a pivot II.
The utility model has the advantages that:
the driving oil cylinder drives the upper jaw plate frame and the lower jaw plate frame to rotate, and the slope on the back-up wrench head main body forces the three swing jaw plate assemblies to move towards the center at the same time, so that three groups of wrench teeth clamp the tubular column at the same time, the clamping is reliable, the structure is stable, and the device has the advantage of reducing damage to the tubular column.
Drawings
The utility model will be further described with reference to the drawings and examples.
FIG. 1 is a top view of the structure of the present utility model (partially removed upper jaw plate frame);
FIG. 2 is a cross-sectional view of the structure of the present utility model;
figure 3 is a top view of the head portion of the present utility model (with the upper jaw plate frame removed).
In the figure: 1. a back-up wrench body; 2. a back-up tong head body; 21. an opening; 22. a slope; 23. a capacity arc groove; 31. upper jaw plate frame; 32. a chin bar frame; 33. a support shaft; 4. swing the jaw plate assembly; 41. a jaw plate; 42. clamping teeth; 43. a roller shaft; 44. a roller; 45. a swing shaft; 5. a tension spring; 61. a pivot I; 62. a pivot II; 7. a driving oil cylinder; 71. an oil cylinder; 72. and an oil cylinder rod.
Detailed Description
As shown in fig. 1, 2 and 3: the mechanism comprises a back-up wrench body 1, a back-up wrench head body 2, an upper jaw plate frame 31, a lower jaw plate frame 32, a supporting shaft 33, a swinging jaw plate assembly 4, a tension spring 5, a pivot I61, a pivot II 62 and a driving oil cylinder 7, wherein the back-up wrench head body 2 is positioned between the upper jaw plate frame 31 and the lower jaw plate frame 32, an opening 21 is arranged on the back-up wrench head body 2, the upper jaw plate frame 31 and the lower jaw plate frame 32 are fastened into a whole through the supporting shaft 33, and the back-up wrench head body 2 is fixed on the back-up wrench body 1; three swing jaw plate assemblies 4 are arranged between the upper jaw plate frame 31 and the lower jaw plate frame 32, the swing jaw plate assemblies 4 are arranged in swing shaft 45 holes on the upper jaw plate frame 31 and the lower jaw plate frame 32 through swing shafts 45, and the swing jaw plate assemblies 4, the swing shafts 45, the upper jaw plate frame 31 and the lower jaw plate frame 32 form a fixed hinge swing pair; the swing jaw plate assembly 4 comprises a jaw plate 41, a clamp tooth 42, a roller 44, a roller shaft 43 and a swing shaft 45, wherein one end of the jaw plate 41 is provided with a swing shaft 45 hole, the outer side of the other end is provided with a roller shaft 43 hole, and the inner side of the jaw plate 41 is provided with a clamp tooth 42 slot; the upper jaw plate frame 31 and the lower jaw plate frame 32 are provided with three groups of corresponding swing shaft 45 holes;
three groups of sloping surfaces 22 are arranged on the inner side of the back-up wrench head main body 2, a containing arc groove 23 is arranged at the symmetrical center of each group of sloping surfaces 22, one swing jaw plate assembly 4 is arranged on one group of sloping surfaces 22 on the inner side of the back-up wrench head main body 2, and a roller 44 is positioned in the corresponding containing arc groove 23 when in an initial position; the central section of one group of sloping surfaces 22 coincides with the central section of the opening 21 of the back-up wrench head main body 2, and the other two groups of sloping surfaces 22 are symmetrically distributed on two sides of the central section of the opening 21 of the back-up wrench head main body 2.
The swing jaw plate assembly 4 is provided with a tension spring 5, one end of the tension spring 5 is fixed on the jaw plate 41, and the other end is fixed on the upper jaw plate frame 31.
The jaws 42 on the three swing jaw assemblies 4 are symmetrical in cross section along the center of the opening 21 of the back-up tong head body 2 when clamping a pipe string.
Preferably, three sets of swing axle 45 holes in the upper and lower jaw frames 31, 32 are provided, two sets being provided on the right side of the open center section of the upper and lower jaw frames 31, 32 and the other set being provided on the left side thereof.
Preferably, three sets of swing axle 45 holes in the upper and lower jaw frames 31, 32 are provided, two sets being provided on the left side of the open center section of the upper and lower jaw frames 31, 32 and the other set being provided on the right side.
The cylinder body 71 of the drive cylinder 7 is pivotally provided to the back-up wrench body 1 via a pivot I61, and the cylinder rod 72 at the other end is pivotally provided to the upper jaw frame 31 via a pivot II 62.
The oil is supplied to the driving oil cylinder 7, the oil cylinder rod 72 extends out to drive the upper jaw plate frame 32 and the lower jaw plate frame 32 to rotate, the three sloping surfaces 22 on the back-up tong head main body 2 act on the centripetal force of the three idler wheels 44, the three swinging jaw plate assemblies 4 are forced to do rotary motion around the swinging shafts 45 to the center, the idler wheels 44 continue to ascend along the sloping surfaces 22 until the tong teeth 42 clamp the pipe string at the same time, and three-point clamping of the pipe string is realized.
Claims (5)
1. The utility model provides a three jaw back-up tong clamping mechanism of power tong swing for oil field pipe, includes back-up tong main part, back-up tong head main part, upper jaw grillage, lower jaw grillage, back-up shaft, swing jaw plate assembly, extension spring, actuating cylinder, pivot I, pivot II, back-up tong head main part is located between upper jaw plate frame and the lower jaw plate frame, is equipped with the opening on its back-up tong head main part, and upper jaw plate frame and lower jaw plate frame pass through the back-up shaft to be fastened in an organic whole, back-up tong head main part is fixed on the back-up tong main part; the swing jaw plate assembly comprises a jaw plate, clamp teeth, rollers, roller shafts and a swing shaft, wherein one end of the jaw plate is provided with a swing shaft hole, the outer side of the other end of the jaw plate is provided with the roller shaft hole, and the inner side of the jaw plate is provided with a clamp tooth slot; the driving oil cylinder is fixed on the back-up wrench main body through one end of a pivot I, and the other end of the driving oil cylinder is fixed on the upper jaw plate frame through a pivot II, and is characterized in that: three swing jaw plate assemblies are arranged between the upper jaw plate frame and the lower jaw plate frame, the swing jaw plate assemblies are arranged in swing shaft holes on the upper jaw plate frame and the lower jaw plate frame through swing shafts, and the swing jaw plate assemblies, the swing shafts, the upper jaw plate frame and the lower jaw plate frame form a fixed hinge swing pair; corresponding swing shaft holes on the upper jaw plate frame and the lower jaw plate frame are three groups;
the inner side of the back-up wrench head main body is provided with three groups of sloping surfaces, the symmetrical center of each group of sloping surfaces is provided with a holding arc groove, one swing jaw plate assembly is arranged at one group of sloping surfaces on the inner side of the back-up wrench head main body, and the roller wheels of the swing jaw plate assembly are positioned in the corresponding holding arc grooves when in an initial position; the central section of one group of sloping surfaces coincides with the central section of the opening of the main body of the back-up wrench head, and the other two groups of sloping surfaces are symmetrically distributed on two sides of the central section of the opening of the main body of the back-up wrench head.
2. The power tong swinging tri-jaw back-up tong clamping mechanism for oilfield tubulars of claim 1, wherein: the swing jaw plate assembly is provided with a tension spring, one end of the tension spring is fixed on the jaw plate, and the other end of the tension spring is fixed on the upper jaw plate frame.
3. The power tong swinging tri-jaw back-up tong clamping mechanism for oilfield tubulars of claim 1, wherein: and the clamp teeth on the three swing jaw plate assemblies are symmetrical along the central section of the opening of the back-up clamp head main body when the pipe column is clamped.
4. The power tong swinging tri-jaw back-up tong clamping mechanism for oilfield tubulars of claim 1, wherein: and the three groups of swing shaft holes on the upper jaw plate frame and the lower jaw plate frame are respectively arranged on the right side of the central section of the opening of the upper jaw plate frame and the lower jaw plate frame, and the other group of swing shaft holes is arranged on the left side of the opening of the upper jaw plate frame and the lower jaw plate frame.
5. The power tong swinging tri-jaw back-up tong clamping mechanism for oilfield tubulars of claim 1, wherein: and the three groups of swing shaft holes on the upper jaw plate frame and the lower jaw plate frame are arranged on the left side of the central section of the opening of the upper jaw plate frame and the lower jaw plate frame, and the other group of swing shaft holes is arranged on the right side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322919554.9U CN220133925U (en) | 2023-10-31 | 2023-10-31 | Three jaw back-ups clamping mechanism of power tongs swing for oil field pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322919554.9U CN220133925U (en) | 2023-10-31 | 2023-10-31 | Three jaw back-ups clamping mechanism of power tongs swing for oil field pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220133925U true CN220133925U (en) | 2023-12-05 |
Family
ID=88958970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322919554.9U Active CN220133925U (en) | 2023-10-31 | 2023-10-31 | Three jaw back-ups clamping mechanism of power tongs swing for oil field pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220133925U (en) |
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2023
- 2023-10-31 CN CN202322919554.9U patent/CN220133925U/en active Active
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