Jaw plate resetting device

Abstract

The utility model discloses a jaw plate resetting device, which relates to the technical field of petroleum equipment design and manufacture, and comprises a clamp body, a jaw plate frame rotatably arranged in the clamp body, and a jaw plate moving back and forth in the jaw plate frame, the outer side end of the jaw plate is connected with a roller through a roller shaft, and a slope plate in rolling fit with the roller is fixed on the inner side of the clamp body. The roller shaft is located in a sliding station parallel to the climbing face of the slope plate in an up-down limiting mode, and a dismounting hole groove matched with the roller shaft is formed in the upper portion of the sliding station. A rigid reset mode is adopted in the whole structure, the structure is simplified, overall disassembly and assembly are more convenient, the working efficiency is greatly improved, meanwhile, the overall operation safety is greatly improved, overall operation is more reliable and stable, and on the basis, the disassembly and assembly hole grooves are arranged in a matched mode, so that the disassembly and assembly efficiency is improved. And the roller shaft and even the jaw plate are convenient to disassemble and assemble, so that the disassembly and assembly convenience is further improved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum equipment design and manufacturing, in particular to a jaw plate resetting device. Background Art

[0002] In the operation of making and breaking out drilling tools such as tubing, casing, and drill pipe, an open-type pipe power tong is often used. The clamping method of this type of power tong is mostly an internal climbing structure, that is, the jaw plate roller (or roller) climbs to push the jaw plate assembly out to clamp the drilling tool, and the impact of the drilling tool or the centrifugal force of the reverse rotation restores it to the initial position. At this time, many of them cannot be completely returned to the original position. Before the next operation, the operator needs to push the jaw plate assembly by hand or an instrument to reset it. However, this not only poses a safety hazard, but also affects work efficiency.

[0003] The research on the jaw plate resetting device in the prior art, such as the main jaw plate mechanism of the petroleum hydraulic pliers in patent application CN210977350U, can realize the automatic resetting of the jaw plate under the action of the spring restoring force to a certain extent through the coordination of the spring used in conjunction with the jaw plate, thereby improving the operation safety and operation efficiency. However, the spring in the prior art is very likely to produce metal fatigue due to long-term use, so that the restoring force is weakened or even fails, and it is impossible to ensure the complete resetting of the jaw plate, which ultimately leads to limited improvement in operation safety and general operation reliability. At the same time, the prior art has the problem of complex structure and troublesome disassembly and assembly of the spring when replacing the jaw plate, which makes the overall disassembly and assembly inconvenient, resulting in limited improvement in work efficiency.

[0004] Therefore, a new technical solution is needed to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a jaw plate resetting device to solve the technical problems that the spring in the prior art proposed in the above background technology is very likely to produce metal fatigue during long-term use, so that the restoring force is weakened or even fails, thereby being unable to ensure the complete resetting of the jaw plate, resulting in limited improvement in operation safety and general operation reliability. At the same time, the overall disassembly and assembly in the prior art is inconvenient, resulting in limited improvement in work efficiency.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A jaw plate resetting device comprises a pliers body, a jaw plate frame, a jaw plate, a tooth seat, and a tooth plate embedded in the inner surface of the tooth seat, the jaw plate frame is rotatably arranged in the pliers body, the jaw plate frame is provided with a square groove for accommodating the jaw plate, the jaw plate moves back and forth in the square groove, the outer end of the jaw plate is also connected to a roller through a roller shaft, a ramp plate is fixed to the inner side of the pliers body, the ramp plate and the roller are rollingly matched, the roller shaft is upper and lower limited to be located in a sliding station parallel to the climbing surface of the ramp plate, and a disassembly and assembly hole groove matching the roller shaft is provided above the sliding station.

[0008] Furthermore, the inner surface of the jaw plate is concave to form a T-slot, the outer end of the tooth seat is inserted into and bolted to the inside of the T-slot, the inner surface of the tooth seat is V-shaped and concave to form a tooth plate groove that matches the tooth plate, the tooth plate groove is a dovetail structure and is symmetrically provided with two, the top and bottom of the inner bottom wall of the tooth plate groove are respectively threadedly connected with limit screws, the tooth plates are clamped in the tooth plate groove by the limit screws one by one, the top bolt of the pliers body is fixed with an open flange, the jaw plate frame is also arranged on the inner side of the open flange, the outer end of the jaw plate extends into the inner cavity formed by the open flange and the pliers body, and the open flange is close to the jaw A lower boss for limiting the upper end of the roller shaft is formed by extending downward from the bottom of one end of the plate, and an arc-shaped slide groove for limiting the lower end of the roller shaft is formed on the upper surface of the lower end of the clamp body, and the ramp plate is arranged on both sides of the jaw plate and is symmetrical about the axis of the jaw plate frame, and the side wall curves of the lower boss and the arc-shaped slide groove are parallel to the curve of the ramp plate climbing surface, and the disassembly and assembly hole grooves are arranged on the opening flange at positions corresponding to the ends of the arc-shaped slide groove, and the upper and lower ends of the roller shaft pass through the jaw plate, and the outer end of the jaw plate is formed with a jaw plate inner cavity for accommodating the rotation of the roller, and the roller sleeve is arranged in the middle position of the roller shaft and half extends out of the jaw plate inner cavity.

[0009] Furthermore, the jaw plates are provided with two, and the two square grooves are arranged symmetrically on the left and right.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The cam is provided with a plurality of movable jaws, and a plurality of movable jaws are provided in the plurality of movable jaws, and a plurality of movable jaws are provided in the plurality of movable jaws, and a plurality of movable jaws are provided in the plurality of movable jaws.

[0012] 2. In the utility model, an open flange is fixed by bolts on the top of the pliers body, and a lower boss is extended downward from one end of the open flange close to the jaw plate to form a lower boss, and an arc-shaped slide groove is formed on the upper surface of the lower end of the pliers body. In the utility model, the side wall curve of the lower boss and the side wall curve of the arc-shaped slide groove are arranged in parallel with the curve of the climbing surface of the ramp plate, and only the lower boss and the arc-shaped slide groove are used to provide upper and lower limits for the roller shaft, which further simplifies the overall structure and further ensures the realization of automatic extension and retraction of the jaw plate under the limit action, ultimately further improving the overall operation safety and reliability, and further improving the convenience of disassembly and assembly and work efficiency.

[0013] 3. The disassembly and assembly holes in the utility model are arranged on the opening flange at positions corresponding to the ends of the arc-shaped slide grooves, that is, the disassembly and assembly holes in the utility model are arranged at the climbing limit positions, which further facilitates the disassembly and assembly of components such as the roller shaft and the jaw plate, thereby further improving the convenience of disassembly and assembly and improving work efficiency.

[0014] 4. The tooth seat and the jaw plate in the utility model are positioned by a T-slot and fixedly connected with bolts. The tooth plate and the tooth seat in the utility model are positioned by a dovetail groove and connected with screws. The above arrangement facilitates the replacement of the tooth seat and the tooth plate, thereby further ensuring the convenience of overall disassembly and assembly, and while ensuring work efficiency, effectively improves the stability of the connection and installation of the tooth seat, the tooth plate and the jaw plate, thereby further improving the overall operation safety and improving the operation reliability; in addition, the V-shaped structure of the inner surface of the tooth seat in the utility model also makes the clamping effect of the tooth plate better, thereby further ensuring the overall operation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the top view structure of the utility model;

[0016] Figure 2 for Figure 1 AA cross-sectional structural diagram;

[0017] Figure 3 This is a schematic diagram of the working principle of the jaw plate of the utility model;

[0018] Figure 4 It is a schematic diagram of the top view of the structure of the utility model when disassembling and assembling the roller shaft;

[0019] In the figure: 1, ramp plate, 2, roller, 3, roller shaft, 4, jaw plate frame, 41, square groove, 5, jaw plate, 51, jaw plate inner cavity, 52, T-slot, 6, clamp body, 61, arc-shaped slide groove, 7, opening flange, 8, lower boss, 9, disassembly hole groove, 10, tooth seat, 101, tooth plate groove, 11, tooth plate, 12, limit screw. DETAILED DESCRIPTION

[0020] The utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] See also Figure 1 to Figure 4 , which shows a jaw plate resetting device, including a pliers body 6, and an open flange 7 bolted to the pliers body 6, a jaw plate frame 4 is provided inside the pliers body 6 and the open flange 7 for common rotation (the rotating driving components such as hydraulic motors equipped on the existing power pliers jaw plate frame are well known in the art, so no further explanation is given here), two square grooves 41 are symmetrically provided horizontally on the jaw plate frame 4, and jaw plates 5 are provided in the square grooves 41 one by one, the outer ends of the jaw plates 5 are all extended into the inner cavity formed by the open flange 7 and the pliers body 6 and a jaw plate inner cavity 51 is formed, and rollers 2 are provided in the jaw plate inner cavity 51 one by one, and the rollers 2 are all half extended out of the jaw plate inner cavity 51 and are sleeved with rollers on the inside The wheel axle 3 and the upper and lower ends of the roller shaft 3 are both passed through the corresponding jaw plate 5 (here, the roller shaft 3 can have a threaded hole for easy disassembly and assembly), the inner surface of the jaw plate 5 is concave to form a T-slot 52, and the T-slot 52 has a tooth seat 10 inserted into it one by one. The outer ends of the tooth seat 10 are inserted into and bolted to the corresponding T-slot 52. The inner surface of the tooth seat 10 is a V-shaped structure and is respectively concave to form two tooth plate grooves 101 with a dovetail structure. The tooth plate 11 is correspondingly arranged in the tooth plate groove 101, and the top and bottom of the inner bottom wall of the tooth plate groove 101 are also threadedly connected with limit screws 12, and the tooth plate 11 is clamped in the corresponding tooth plate groove 101 by the limit screw.

[0022] Furthermore, both sides of the jaw plate 5 are respectively provided with ramp plates 1 for rolling cooperation therewith, the ramp plates 1 are symmetrical about the axis of the jaw plate frame 4 and are fixed to the inner side of the caliper body 6, and the upper surface of the lower end of the caliper body 6 is formed with arc-shaped slide grooves 61 for limiting the lower end of the roller shaft 3 in a one-to-one manner, and the side wall curves of the arc-shaped slide grooves 61 are parallel to the curves of the climbing surface of the ramp plate 1 on the same side, and the opening flange 7 extends downward from the lower end near the jaw plate 5 to form a pair of lower bosses 8 for limiting the upper end of the roller shaft 3, and the side wall curves of the lower bosses 8 are parallel to the curves of the climbing surface of the ramp plate 1 on the same side.

[0023] Furthermore, disassembly holes 9 (in this embodiment, the disassembly holes 9 can be through holes or through grooves) that match the roller shaft 3 are provided at positions corresponding to the ends of the arc-shaped slide groove 61 on the opening flange 7. The disassembly holes 9 can facilitate the disassembly and assembly of the roller shaft 3, the jaw plate 5 and other components.

[0024] During operation, the lower boss 8 and the arc-shaped slide groove 61 provide a limit for the roller shaft 3, so that the jaw plate 5 together with the tooth plate 11 can be automatically extended and retracted under the limit, thereby realizing the corresponding buckle-on and breakout and reset functions. During the whole process, the jaw plate frame 4 rotates, driving the roller 2 to roll and climb along the slope plate 1, thereby pushing the jaw plate 5 and the tooth plate 11 forward to clamp the drilling tool and reset backward.

Claims

1. A jaw plate resetting device, comprising a caliper body, a jaw plate frame rotatably arranged in the caliper body, and a jaw plate moving back and forth in the jaw plate frame, wherein the outer end of the jaw plate is connected to a roller through a roller shaft, and a ramp plate rollingly matched with the roller is fixed to the inner side of the caliper body, characterized in that: The roller shaft is located at a sliding station parallel to the climbing surface of the ramp plate with upper and lower limits, and a disassembly hole groove matched with the roller shaft is arranged above the sliding station.

2. A jaw plate resetting device according to claim 1, characterized in that: The top bolts of the caliper body are fixed with an opening flange, and the jaw plate frame is arranged on the inner side of the opening flange. The outer end of the jaw plate extends into the inner cavity formed by the opening flange and the caliper body.

3. A jaw plate resetting device according to claim 2, characterized in that: The lower end of the opening flange close to the jaw plate extends downward to form a lower boss for limiting the upper end of the roller shaft, and the upper surface of the lower end of the clamp body is formed with an arc-shaped sliding groove for limiting the lower end of the roller shaft.

4. A jaw plate resetting device according to claim 3, characterized in that: The disassembly and assembly holes are arranged on the opening flange at positions corresponding to the ends of both ends of the arc-shaped sliding groove.

5. A jaw plate resetting device according to claim 3, characterized in that: The ramp plates are arranged on both sides of the jaw plate and are symmetrical about the axis of the jaw plate frame. The side wall curve of the lower boss and the side wall curve of the arc-shaped slide groove are parallel to the curve of the ramp plate climbing surface.

6. A jaw plate resetting device according to claim 5, characterized in that: The upper and lower ends of the roller shaft both pass through the jaw plate, and the outer end of the jaw plate forms a jaw plate inner cavity for accommodating the rotation of the roller. The roller sleeve is arranged in the middle position of the roller shaft and half extends out of the jaw plate inner cavity.

7. The jaw plate resetting device according to claim 1, characterized in that: The inner surface of the jaw plate is concave to form a T-shaped groove, and the jaw plate is also provided with a tooth seat matching it. The outer end of the tooth seat is inserted into and bolted inside the T-shaped groove. The inner surface of the tooth seat is V-shaped and embedded with a tooth plate.

8. A jaw plate resetting device according to claim 7, characterized in that: The inner surface of the tooth seat is concave to form a tooth plate groove adapted to the tooth plate, the top and bottom of the inner bottom wall of the tooth plate groove are both threadedly connected with limit screws, and the tooth plate is clamped in the tooth plate groove by the limit screws.

9. A jaw plate resetting device according to claim 8, characterized in that: The tooth plate groove is in a dovetail structure and two are symmetrically arranged.

10. The jaw plate resetting device according to claim 1, characterized in that: The jaw plate frame is provided with two square grooves for accommodating the jaw plates symmetrically on the left and right sides, and the jaw plates are provided with two square grooves which move forward and backward in a one-to-one correspondence.

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