CN210977349U - Main tong limiting mechanism of petroleum hydraulic tongs - Google Patents

Abstract

The utility model discloses a main tong stop gear of petroleum hydraulic tong, including the wheel cap, both sides are provided with connecting plate and jaw grillage respectively about the wheel cap, jaw grillage top is provided with the flange, the flange passes wheel cap and connecting plate fixed connection, the connecting plate upside is provided with the apron, the connecting plate downside is seted up the orbit and is curved spacing groove, the gyration axis of spacing groove and the gyration axis coincidence of wheel cap, the rotatable gag lever post that the apron was worn out to the upper end is worn to be equipped with in the middle part of the spacing groove, the terminal surface is seted up at the gag lever post, the gag lever post lower end is seted up jaggedly, be provided with the round pin axle that is fixed in the wheel cap under the blind hole, the round pin axle upper end extends to in the spacing groove, the diameter of round pin axle is less than the width of breach and the diameter of blind; the utility model discloses simple structure provides fine limiting displacement for jaw plate frame's reply, has improved jaw plate frame's life, has also prevented that jaw plate frame from damaging pipe utensil or drilling tool.

Description

Main tong limiting mechanism of petroleum hydraulic tongs

Technical Field

The utility model belongs to the technical field of the hydraulic pincers complementary unit of petroleum, especially, relate to a main pincers stop gear of hydraulic pincers of petroleum.

Background

The hydraulic tongs are a workover tool for mechanically screwing and unscrewing a screw thread tool operated by using workover rig power, and have the advantages of obvious advantages and convenient use. When using hydraulic tong to go up the screw thread, the main tong of hydraulic tong corotation, jaw grillage corotation also follows thereupon, the pipe utensil or drilling tool will be fastened to the jaw board on the jaw grillage, when the operation is accomplished, jaw grillage resets under the effect of answer spring, the transition that resets can appear in the reply process hits the phenomenon of beating the pipe utensil, also can appear jaw grillage reply and shake the phenomenon appear, and unload the screw thread operation completion back in the reversal, same problem also can appear, the life of jaw grillage has not only been reduced like this, but also can damage pipe utensil or drilling tool.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a main tong stop gear of petroleum hydraulic tong, fine solution the problem that jaw grillage reset transition.

In order to realize the purpose, the utility model discloses a technical scheme as follows: a main tong limiting mechanism of a petroleum hydraulic tong comprises a wheel cover, a connecting plate and a jaw plate frame which can rotate around the axis of the wheel cover are respectively arranged on the upper side and the lower side of the wheel cover, a flange is arranged above the jaw plate frame, the flange passes through the wheel cover and is fixedly connected with the connecting plate, the upper side of the connecting plate is provided with a cover plate, the lower side surface of the connecting plate is provided with a limiting groove with an arc track, the rotation axis of the limiting groove is superposed with the rotation axis of the wheel cover, the middle part of the limiting groove is penetrated with a rotatable limiting rod with the upper end penetrating out of the cover plate, the upper end of the limiting rod is fixed with a knob, the lower end surface of the limiting rod is provided with a blind hole, the lower end head of the limiting rod is provided with a notch communicated with the blind hole, and, the upper end of the pin shaft extends into the limiting groove, the diameter of the pin shaft is smaller than the width of the notch and the diameter of the blind hole, and the upper end of the limiting rod is provided with a positioning assembly fixed on the cover plate.

Furthermore, the pin shaft slides 45 degrees between the end part of the limit groove and the blind hole in a reciprocating manner.

Furthermore, the diameter of the pin shaft is the same as that of the blind hole and is in clearance fit with the blind hole, and the diameter of the blind hole is the same as that of the notch.

Furthermore, openings distributed at equal intervals are formed in the outer side of the flange, and bosses which are staggered and distributed at equal intervals with the openings are arranged on the connecting plate.

Furthermore, the locating component comprises a fixing block sleeved on the upper end of the limiting rod, a transverse through hole is formed in the fixing block, a compression spring is arranged in the through hole, a plug is arranged at one end, away from the limiting rod, of the compression spring, a steel ball is arranged at one end, close to the limiting rod, of the compression spring, a groove with the diameter smaller than that of the steel ball is formed in the limiting rod, and the steel ball can partially sink into the groove.

Compared with the prior art, the utility model discloses following beneficial effect has: after the upper screw thread operation is finished, the jaw plate frame is reset under the elastic force of the return spring, the connecting plate fixedly connected with the jaw plate frame is reset along with the jaw plate frame, the pin shaft fixed on the wheel cover slides in the limiting groove and stops in the blind hole of the limiting rod, and at the moment, the jaw plate frame returns to the middle position and stops rotating; rotate 180 with the knob, unload the back that the screw thread operation was accomplished, the other end of round pin axle in the spacing groove slides to stop the jaw grillage at the meso position, the utility model discloses simple structure provides fine limiting displacement for jaw grillage's reply, has improved the life of jaw grillage, has also prevented that jaw grillage from damaging pipe utensil or drilling tool.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a front view of the gusset;

FIG. 3 is a rear view of FIG. 2;

FIG. 4 is a perspective view of a stop lever;

FIG. 5 is a front view of the lower end face of the stop lever;

FIG. 6 is a perspective view of the jaw plate frame;

fig. 7 is an enlarged view of a portion i of fig. 1.

In the figure: 1. a wheel cover; 2. a coupling plate; 3. a jaw plate frame; 4. a flange; 5. a cover plate; 6. a limiting groove; 7. A limiting rod; 8. a knob; 9. blind holes; 10. a notch; 11. a pin shaft; 12. opening the gap; 13. a boss; 14. A fixed block; 15. a through hole; 16. a compression spring; 17. plugging by screwing; 18. a steel ball; 19. and (4) a groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in figures 1-7, the main tong limiting mechanism of the petroleum hydraulic tong comprises a wheel cover 1, a connecting plate 2 and a jaw plate frame 3 which can rotate around the axis of the wheel cover 1 are respectively arranged on the upper side and the lower side of the wheel cover 1, a flange 4 is arranged above the jaw plate frame 3, the flange 4 passes through the wheel cover 1 and is fixedly connected with the connecting plate 2, a cover plate 5 fixed by a bolt is arranged on the upper side of the connecting plate 2, a limiting groove 6 with an arc track is arranged on the lower side of the connecting plate 2, the rotary axis of the limiting groove 6 is coincided with the rotary axis of the wheel cover 1, a rotatable limiting rod 7 with the upper end penetrating through the cover plate 5 is arranged in the middle of the limiting groove 6, a knob 8 is fixed on the upper end of the limiting rod 7 by a pin, a blind hole 9 is arranged on the lower end face of the limiting rod 7, a notch 10 communicated with the blind hole 9 is arranged at the lower end, the wheel cover 1 is provided with a hole, the pin shaft 11 is fixed on the wheel cover 1 in an interference fit mode, the upper end of the pin shaft 11 extends into the limiting groove 6, the diameter of the pin shaft 11 is smaller than the width of the notch 10 and the diameter of the blind hole 9, and the pin shaft 11 can slide out of the blind hole 9 along the notch 10. And the upper end of the limiting rod 17 is provided with a positioning component fixed on the cover plate 5.

In this embodiment, the limit groove 6 is opened by 90 ° around the axis of the wheel cover 1, and the pin 11 slides 45 ° back and forth between the end of the limit groove 6 and the blind hole 9.

In the embodiment, the diameter of the pin shaft 11 is the same as that of the blind hole 9 and is in clearance fit, so that the pin shaft 11 and the limiting rod 7 can rotate relatively; the diameter of the blind hole 9 is the same as that of the notch 10, so that the blind hole 9 and the notch 10 can be conveniently machined, and the machining steps are simplified.

In this embodiment, openings 12 distributed at equal intervals are formed in the outer side of the flange 4, bosses 13 distributed at equal intervals and staggered with the openings 12 are arranged on the connecting plate 2, and synchronous rotation between the connecting plate 2 and the jaw plate frame 3 is achieved.

In this embodiment, the positioning assembly includes a fixing block 14 sleeved on the upper end of the limiting rod 7, a transverse through hole 15 is formed in the fixing block 14, a compression spring 16 is arranged in the through hole 15, a plug 17 is arranged at one end of the compression spring 16 far away from the limiting rod 7, a thread matched with the plug 17 is processed in the through hole 15, a steel ball 18 is arranged at one end of the compression spring 16 close to the limiting rod 7, a groove 19 with a diameter smaller than that of the steel ball 18 is formed in the limiting rod 7, and the steel ball 18 can partially sink into the groove 19. When the knob 8 is rotated to enable the notch 10 to face the direction of rotation of the jaw plate frame 3, the groove 19 faces the steel ball 18, and the steel ball 18 sinks into the groove 19 under the action of the elastic force of the compression spring 16 to limit the position of the limiting rod 7; the phenomenon that the pin shaft 11 cannot return to the blind hole 9 due to the fact that the limiting rod 7 rotates due to mechanical vibration in the using process is prevented.

In this embodiment, 8 one end of knob is the arrow form to align from top to bottom with breach 10, can judge the position of breach 10, also can instruct jaw plate frame 3's rotation direction, convenient to use.

When the utility model is used, after the upper screw thread operation is completed, the jaw plate frame 3 is reset under the elastic force of the return spring 16, the connecting plate 2 fixedly connected with the jaw plate frame 3 is reset along with the jaw plate frame 3, the pin shaft 11 fixed on the wheel cover 1 slides in the limiting groove 6 and stops in the blind hole 9 of the limiting rod 7, and at the moment, the jaw plate frame 3 returns to the middle position and stops rotating; before the shackle operation is carried out, the knob 8 is rotated by 180 degrees, the notch 10 faces to the direction in which the jaw plate frame 3 is to be rotated, after the shackle operation is completed, the jaw plate frame 3 is reset, the pin shaft 11 similarly enters the blind hole 9 from the notch 10, and the rotation of the jaw plate frame 3 is stopped; the utility model discloses simple structure provides fine limiting displacement for jaw plate frame 3's reply, has improved jaw plate frame 3's life, has also prevented jaw plate frame 3 from damaging pipe utensil or drilling tool.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (6)

1. The utility model provides a main pincers stop gear of petroleum hydraulic tong which characterized in that: comprises a wheel cover (1), a connecting plate (2) and a jaw plate frame (3) which can rotate around the axis of the wheel cover (1) are respectively arranged on the upper side and the lower side of the wheel cover (1), a flange (4) is arranged above the jaw plate frame (3), the flange (4) penetrates through the wheel cover (1) and is fixedly connected with the connecting plate (2), a cover plate (5) is arranged on the upper side of the connecting plate (2), a limiting groove (6) with an arc-shaped track is arranged on the lower side of the connecting plate (2), the rotary axis of the limiting groove (6) is superposed with the rotary axis of the wheel cover (1), a rotatable limiting rod (7) with the upper end penetrating out of the cover plate (5) is penetrated through the middle part of the limiting groove (6), a knob (8) is fixed on the upper end of the limiting rod (7), a blind hole (9) is arranged on the lower end face of the limiting rod (7), a notch (, be provided with round pin axle (11) that are fixed in on wheel cap (1) under blind hole (9), round pin axle (11) upper end extends to spacing groove (6) in, and the diameter of round pin axle (11) is less than the width of breach (10) and the diameter of blind hole (9) simultaneously, gag lever post (7) upper end is provided with the locating component who is fixed in on apron (5).

2. The main tong limiting mechanism of oil hydraulic tongs according to claim 1, characterized in that: the pin shaft (11) slides 45 degrees in a reciprocating manner between the end part of the limiting groove (6) and the blind hole (9).

3. The main tong limiting mechanism of oil hydraulic tongs according to claim 1, characterized in that: the diameter of the pin shaft (11) is the same as that of the blind hole (9) and is in clearance fit with the blind hole, and the diameter of the blind hole (9) is the same as that of the notch (10).

4. The main tong limiting mechanism of oil hydraulic tongs according to claim 1, characterized in that: openings (12) distributed at equal intervals are formed in the outer side of the flange (4), and bosses (13) which are staggered and distributed at equal intervals with the openings (12) are arranged on the connecting plate (2).

5. The main tong limiting mechanism of oil hydraulic tongs according to claim 1, characterized in that: the positioning assembly comprises a fixing block (14) sleeved on the upper end of a limiting rod (7), a transverse through hole (15) is formed in the fixing block (14), a compression spring (16) is arranged in the through hole (15), one end, far away from the limiting rod (7), of the compression spring (16) is provided with a plug (17), one end, close to the limiting rod (7), of the compression spring (16) is provided with a steel ball (18), a groove (19) with the diameter smaller than that of the steel ball (18) is formed in the limiting rod (7), and the steel ball (18) can partially sink into the groove (19).

6. The main tong limiting mechanism of oil hydraulic tongs according to claim 1, characterized in that: one end of the knob (8) is arrow-shaped and is aligned with the notch (10) up and down.

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