CN203145863U - Back-up tongs clamping mechanism for power tongs used for oil field - Google Patents
Back-up tongs clamping mechanism for power tongs used for oil field Download PDFInfo
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- CN203145863U CN203145863U CN 201320118881 CN201320118881U CN203145863U CN 203145863 U CN203145863 U CN 203145863U CN 201320118881 CN201320118881 CN 201320118881 CN 201320118881 U CN201320118881 U CN 201320118881U CN 203145863 U CN203145863 U CN 203145863U
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- tongs
- grillage
- arc groove
- tolerant
- tooth assembly
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Abstract
The utility model provides a back-up tongs clamping mechanism for power tongs used for an oil field. An annular tongs head body with one side provided with an opening is located between an upper jaw plate rack and a lower jaw plate rack, the tongs head body is fixed on a back-up tongs body, three slopes are arranged on the inner surface of the tongs head body, and a containing and receding arc groove is formed in the center of each slope. The center section of one center containing and receding arc groove coincides with the center section of the opening of the tongs head body, the one center containing and receding arc groove corresponds to a horizontally-moving tongs tooth assembly, and the horizontally-moving tongs tooth assembly is clamped between two limiting plates in a sliding mode. The two side containing and receding arc grooves are symmetrically distributed on the two sides of the center section of the opening of the tongs head body, each side containing and receding arc groove corresponds to one rotating tongs tooth assembly, and each rotating tongs tooth assembly is arranged between the upper jaw plate rack and the lower jaw plate rack in a pivoted mode through a jaw plate pin shaft and can rotate around the jaw plate pin shaft. The back-up tongs clamping mechanism for the power tongs used for the oil field has the advantages of reducing damages to tubular columns and being reliable in clamping.
Description
Technical field
The utility model relates to a kind of hydraulic power tongs, and particularly a kind of oil field tubulars belongs to oil equipment manufacturing technology field with the back-up tong of Power Tong.
Background technology
On the oil pipe of oil field shaft mouth, sleeve pipe, drill rod thread, unload and smash, for making the easy accessibility that is threaded, the good stability of above-mentioned tubing string, usually to use a kind of effective Power Tong, this Power Tong is made up of main pincers and back-up tong, the main pincers clamps and the stubborn button effect of rotation, and back-up tong works the tube connector effect that is fixedly clamped.Traditional oil field tubulars with Power Tong back-up tong clamping mode is: take the parallel-moving type jaw of two symmetries or two swing type jaws to realize folder, namely in the cavity of back-up tong main body and the containing of back-up tong epicranial plate, be provided with four negative camber ramps, roller is contained on the jaw, jaw is contained in the square hole of jaw plate frame, when jaw plate frame turns an angle with respect to the back-up tong main body, roller rolls along the ramp negative camber and climbs, constitute the radially translation of jaw, make the pincers tooth clamp tube connector, realize the fixing of tube connector, thereby guarantee the tight pipe of main clamp, go up, shackle; Or jaw is contained in the upper and lower jaw plate frame by the jaw bearing pin, when jaw plate frame turns an angle with respect to the back-up tong main body, roller rolls along the ramp negative camber and climbs, constitute jaw along jaw bearing pin axial rotation, make the pincers tooth clamp tube connector, realize the fixing of tube connector, thereby guarantee the tight pipe of main clamp, go up, shackle.These two kinds of back-up tong binding clip clamp mechanism all are that clamping point is few, damage tubing string easily, and very big to the outer support power of back-up tong main body, make the back-up tong shedding deformation cause damage easily, have also influenced the clamping effect behind the back-up tong shedding deformation, and an armful tight tubing string phenomenon easily occurs skidding.
The utility model content
The utility model provides the back-up tong clamp mechanism of a kind of oil field tubulars with Power Tong, and its purpose is to solve the shortcoming that prior art exists, and makes the clamping of back-up tong clamp mechanism more reliable, reduces the damage to tubing string.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of oil field tubulars back-up tong clamp mechanism of Power Tong, it is characterized in that: side is provided with the binding clip main body of ring-type of opening between maxilla grillage and lower jaw grillage, maxilla grillage and lower jaw grillage are one by bolton, the binding clip main body is fixed on the back-up tong main body, the inner surface of binding clip main body be provided with three domatic, each domatic center is provided with tolerant arc groove; Wherein the centre section of the tolerant arc groove in a center overlaps with the centre section of the opening of binding clip main body, the corresponding translation pincers of the tolerant arc groove in this center tooth assembly, translation pincers tooth assembly is folded between two limiting plates slidably, limiting plate is fixedlyed connected with the lower jaw grillage with the maxilla grillage, and the pincers tooth roller that is pivoted on the translation pincers tooth assembly is positioned at the tolerant arc groove in this center when initial position; In addition two tolerant arc grooves of side are symmetrically distributed in the both sides of centre section of the opening of binding clip main body, the corresponding rotary clamp tooth assembly of the tolerant arc groove of each side, rotary clamp tooth assembly is hubbed between maxilla grillage and the lower jaw grillage by the jaw bearing pin and can rotates around the jaw bearing pin, and the pincers tooth roller that is pivoted on the rotary clamp tooth assembly is positioned at the tolerant arc groove of side when initial position.
Each corresponding back-moving spring assembly of each rotary clamp tooth assembly, the back-moving spring assembly comprises the return spring holder that is installed between maxilla grillage and the lower jaw grillage, one end contact of back-moving spring is on return spring holder, the sheathed sleeve of the other end of back-moving spring, the sleeve contact is on rotary clamp tooth assembly.
Usefulness of the present utility model is:
The utility model is owing to use the upper and lower jaw plate frame of driving hydraulic oil cylinder driving to rotate, domatic on the binding clip main body forces rotary clamp tooth assembly and translation pincers tooth assembly that radially the motion to the center all takes place, realize three pincers teeth to the clamping of tubing string, reliable clamping has minimizing to the advantage of tubing string damage.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the utility model structure vertical view (the local maxilla grillage of removing);
Fig. 2 is the utility model structure sectional view;
Fig. 3 is the utility model binding clip part vertical view (removing the maxilla grillage).
Among the figure: 1. back-up tong main body; 11. maxilla grillage; 12. lower jaw grillage; 2. binding clip main body; 21. opening; 22. it is domatic; 23. the tolerant arc groove in center; 24. the tolerant arc groove of side; 3. translation clamps the tooth assembly; 31. pliers tooth base; 32. pincers tooth; 33. pincers tooth Roller Shaft; 34. pincers tooth roller; 4. limiting plate; 5. rotary clamp tooth assembly; 51. pliers tooth base; 52. pincers tooth; 53. pincers tooth Roller Shaft; 54. pincers tooth roller; 55. jaw bearing pin; 6. back-moving spring assembly; 61. return spring holder; 62. back-moving spring; 63. sleeve; 7. driving oil cylinder; 71. cylinder body; 72. cylinder rod; 81. pivot; 82. pivot.
The specific embodiment
As Fig. 1, Fig. 2, shown in Figure 3:
The utlity model has back-up tong main body 1, maxilla grillage 11 and the lower jaw grillage 12 of upper and lower settings fixedly arranged on the back-up tong main body 1, maxilla grillage 11 and lower jaw grillage 12 are one by bolton.One side is provided with the binding clip main body 2 of ring-type of opening 21 between maxilla grillage 11 and lower jaw grillage 12, binding clip main body 2 is fixed on the back-up tong main body 1, the inner surface of binding clip main body 2 be provided with three domatic 22, each center of domatic 22 is provided with tolerant arc groove: the tolerant arc groove 23 in center and two tolerant arc grooves 24 of side.
The centre section of the tolerant arc groove 23 in center overlaps with the centre section of the opening 21 of binding clip main body 2, the tolerant arc groove 23 corresponding translation pincers tooth assemblies 3 in this center, translation pincers tooth assembly 3 comprises pliers tooth base 31, pliers tooth base 31 is provided with pincers tooth 32 inwardly, pliers tooth base 31 is provided with pincers tooth Roller Shaft 33, pincers tooth roller 34 is that pivot is hubbed on the pliers tooth base 31 with pincers tooth Roller Shaft 33, the initial position of pincers tooth roller 34 is positioned at the tolerant arc groove 23 in center, pliers tooth base 31 is folded between two limiting plates 4 slidably, and limiting plate 4 is fixedlyed connected with lower jaw grillage 12 with maxilla grillage 11.
Two tolerant arc grooves 24 of side are symmetrically distributed in the both sides of centre section of the opening 21 of binding clip main body 2, the tolerant arc groove 24 corresponding rotary clamp tooth assemblies 5 of each side, and rotary clamp tooth assembly 5 comprises pliers tooth base 51, pliers tooth base
51 are provided with pincers tooth 52 inwardly, pliers tooth base 51 is provided with pincers tooth Roller Shaft 53, pincers tooth roller 54 is that pivot is hubbed on the pliers tooth base 51 with pincers tooth Roller Shaft 53, the initial position of pincers tooth roller 54 is positioned at the tolerant arc groove 24 of side, and pliers tooth base 51 is hubbed between maxilla grillage 11 and the lower jaw grillage 12 with jaw bearing pin 55 and can rotates around jaw bearing pin 55; Each rotary clamp tooth assembly 5 each corresponding back-moving spring assembly 6, back-moving spring assembly 6 comprises the return spring holder 61 that is installed between maxilla grillage 11 and the lower jaw grillage 12, one end contact of back-moving spring 62 is on return spring holder 61, the sheathed sleeve 63 of the other end of back-moving spring 62, sleeve 63 contacts are on pliers tooth base 51.Back-moving spring assembly 6 plays the auxiliary reset effect.
Be pivoted with a cylinder body 71 that drives oil cylinder 7 with pivot 81 on the back-up tong main body 1, the cylinder rod 72 of this driving oil cylinder 7 is hubbed on the maxilla grillage 11 with pivot 82.
Start and drive oil cylinder 7, cylinder rod 72 stretches out, drive maxilla grillage 11 and 12 rotations of lower jaw grillage, three domatic 22 in the binding clip main body 2 act on three pincers tooth roller 34,54 axial force and radial loads, pincers tooth roller 34,54 begins to rotate, the radial load that the pincers tooth roller 54 of rotary clamp tooth assembly 5 obtains forces the pliers tooth base 51 of rotary clamp tooth assembly 5 to rotate around jaw bearing pin 55, up to pincers till tooth 52 bites tubing string, the pliers tooth base 31 of translation pincers tooth assembly 3 under the double action of radial load and limiting plate 4 inwardly translation gliding till pincers tooth 32 is bitten tubing string.Pincers tooth 32,52 is bitten tubing string, and tubing string has been realized 3 clampings.
Claims (2)
1. an oil field tubulars is with the back-up tong clamp mechanism of Power Tong, it is characterized in that: side is provided with the binding clip main body of ring-type of opening between maxilla grillage and lower jaw grillage, maxilla grillage and lower jaw grillage are one by bolton, the binding clip main body is fixed on the back-up tong main body, the inner surface of binding clip main body be provided with three domatic, each domatic center is provided with tolerant arc groove; Wherein the centre section of the tolerant arc groove in a center overlaps with the centre section of the opening of binding clip main body, the corresponding translation pincers of the tolerant arc groove in this center tooth assembly, translation pincers tooth assembly is folded between two limiting plates slidably, limiting plate is fixedlyed connected with the lower jaw grillage with the maxilla grillage, and the pincers tooth roller that is pivoted on the translation pincers tooth assembly is positioned at the tolerant arc groove in this center when initial position; In addition two tolerant arc grooves of side are symmetrically distributed in the both sides of centre section of the opening of binding clip main body, the corresponding rotary clamp tooth assembly of the tolerant arc groove of each side, rotary clamp tooth assembly is hubbed between maxilla grillage and the lower jaw grillage by the jaw bearing pin and can rotates around the jaw bearing pin, and the pincers tooth roller that is pivoted on the rotary clamp tooth assembly is positioned at the tolerant arc groove of side when initial position.
2. a kind of oil field tubulars as claimed in claim 1 is with the back-up tong clamp mechanism of Power Tong, it is characterized in that: each corresponding back-moving spring assembly of each rotary clamp tooth assembly, the back-moving spring assembly comprises the return spring holder that is installed between maxilla grillage and the lower jaw grillage, one end contact of back-moving spring is on return spring holder, the sheathed sleeve of the other end of back-moving spring, the sleeve contact is on rotary clamp tooth assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320118881 CN203145863U (en) | 2013-03-15 | 2013-03-15 | Back-up tongs clamping mechanism for power tongs used for oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320118881 CN203145863U (en) | 2013-03-15 | 2013-03-15 | Back-up tongs clamping mechanism for power tongs used for oil field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203145863U true CN203145863U (en) | 2013-08-21 |
Family
ID=48973399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320118881 Expired - Fee Related CN203145863U (en) | 2013-03-15 | 2013-03-15 | Back-up tongs clamping mechanism for power tongs used for oil field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203145863U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104499963A (en) * | 2014-11-24 | 2015-04-08 | 江苏如石机械有限公司 | Power-tongs spinning component and processing method thereof |
| CN115961899A (en) * | 2022-12-13 | 2023-04-14 | 莱州市霸力石油机械有限公司 | Novel hydraulic back-up tong |
-
2013
- 2013-03-15 CN CN 201320118881 patent/CN203145863U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104499963A (en) * | 2014-11-24 | 2015-04-08 | 江苏如石机械有限公司 | Power-tongs spinning component and processing method thereof |
| CN104499963B (en) * | 2014-11-24 | 2016-07-06 | 江苏如石机械有限公司 | Power Tong spinner parts and processing method |
| CN115961899A (en) * | 2022-12-13 | 2023-04-14 | 莱州市霸力石油机械有限公司 | Novel hydraulic back-up tong |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130821 |