CN113338825A

CN113338825A - Novel jaw plate device of sleeve clamp

Info

Publication number: CN113338825A
Application number: CN202110541308.7A
Authority: CN
Inventors: 丁东锋; 高子奇; 张凯; 缪二群
Original assignee: Rudong Qianjin Petroleum Machinery Manufacture Co ltd
Current assignee: Rudong Qianjin Petroleum Machinery Manufacture Co ltd
Priority date: 2021-05-18
Filing date: 2021-05-18
Publication date: 2021-09-03
Anticipated expiration: 2041-05-18
Also published as: CN113338825B

Abstract

The invention discloses a novel jaw plate device of a casing tongs, which comprises a tooth plate, a tooth holder and a jaw plate, wherein the tooth plate is clamped on the front end surface of the tooth holder, an arc surface I is formed at the back of the tooth holder, steps are symmetrically arranged at the upper end and the lower end of the middle part of the arc surface I, an arc surface II is formed on the front end surface of the jaw plate, limiting bosses matched with the steps are symmetrically arranged at the upper end and the lower end of the middle part of the arc surface II, and the tooth holder and the jaw plate are relatively and rotatably connected along the horizontal direction through the steps and the limiting bosses. According to the invention, the tooth holder rotates relative to the jaw plate, so that the position adjustment of the jaw plate is realized, the problem of slip of the casing tongs when an eccentric pipe column is clamped is solved, the working efficiency is improved, the labor intensity of workers is weakened, and the cost investment for replacing the jaw plate is greatly reduced.

Description

Novel jaw plate device of sleeve clamp

Technical Field

The invention relates to the technical field of petroleum drilling, in particular to a novel jaw plate device of casing tongs.

Background

The casing tongs are a tool for tripping the pipe string in petroleum drilling. At present, when the casing tong jaw plate passes through the dental lamina centre gripping tubular column in order to break out, if the tubular column takes place the eccentric wear, because dental lamina and jaw plate fixed connection completely are in the same place, the phenomenon of skidding often also can appear in the casing tong, and this has not only influenced the operation of breaking out, still can lead to the damage of tubular column as to the casing tong. Meanwhile, if the jaw plates of corresponding specifications are replaced aiming at the tubular columns of different pipe diameters, the labor intensity of workers can be increased, the improvement of the working efficiency is not facilitated, and the investment cost is increased.

Chinese patent grant publication No. CN204782840U, publication date 2015, 11 months and 18 days, discloses a micro-indentation dental plate for casing tongs, which comprises a dental plate body and a jaw plate seat, wherein a bayonet lock in an i shape is arranged on the jaw plate seat, a clamping groove matched with the bayonet lock is arranged on the dental plate body, a key groove is arranged at the middle position of the jaw plate seat, and a clamping key for fixing the dental plate body is arranged in the key groove. This dental lamina body and jaw plate seat are complete fixed joint among the prior art, the problem of skidding of casing tongs when the eccentric tubular column of centre gripping can not be solved.

Disclosure of Invention

The invention aims to provide a novel casing tong jaw plate device, which solves the problems that the existing casing tong jaw plate proposed in the background technology is easy to slip when an eccentric pipe column is clamped by a tooth plate, so that the screwing-unscrewing operation is influenced and the pipe column and the casing tong are damaged, and jaw plates with corresponding specifications are replaced aiming at pipe columns with different pipe diameters, so that the labor intensity of workers is increased, the work efficiency is not improved, and the input cost is increased.

In order to achieve the purpose, the invention adopts the following technical scheme:

a novel jaw plate device of a sleeve clamp comprises a jaw plate, a tooth holder and a jaw plate, wherein the tooth plate is fixed on the front end face of the tooth holder, an arc surface I is formed on the back of the tooth holder, the arc surface I is of an outward convex structure, steps are symmetrically arranged at the upper end and the lower end of the middle part of the arc surface I, the front end face of the jaw plate forms an arc surface II matched with the arc surface I, the arc surface II is of an inward concave structure, limiting bosses matched with the steps are symmetrically arranged at the upper end and the lower end of the middle part of the arc surface II, arc surfaces III are formed between the limiting bosses at the upper end and the lower end, the arc surfaces III are also inward concave arc surfaces, the limiting bosses and the jaw plate are integrally formed, annular holes are formed in the middle positions, close to one side of the jaw plate, of the limiting bosses, threaded holes I corresponding to the annular holes up and down are formed in the steps, and fastening screws are respectively connected between the threaded holes I and the annular holes, the one end and the annular hole of holding screw rotate to be connected, holding screw's the other end and I fixed connection in screw hole, the toothholder passes through the step with the jaw board and rotates relatively along the horizontal direction with spacing boss and be connected, between I and the arc surface II, equally divide between spacing boss and the step and do not leave the clearance, reserve out the space that can supply the pivoted for toothholder and jaw board, take place the friction damage when avoiding rotating simultaneously.

The front end face of the tooth holder is symmetrically provided with a tooth plate groove, the top and the bottom in the tooth plate groove are symmetrically provided with a threaded hole II, the threaded hole II is provided with a limit screw, the tooth plate is clamped in the tooth plate groove through the limit screw, the tooth plate is prevented from being separated from the tooth plate due to misoperation, and meanwhile, the tooth plate is convenient to replace.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the tooth holder and the jaw plate are in relative rotation connection in the horizontal direction through the step and the limiting boss, so that the tooth holder can rotate relative to the jaw plate while being connected with the jaw plate, thereby realizing the position adjustment of the tooth plate, finally solving the problem of slip of the casing tongs when an eccentric pipe column is clamped, improving the working efficiency, weakening the labor intensity of workers and greatly reducing the cost input for replacing the jaw plate;

2. in the invention, the gaps between the arc surface I and the arc surface II and between the limiting lug boss and the step are arranged to reserve a space for the tooth holder and the jaw plate to rotate, protect the tooth holder and the jaw plate and avoid friction damage during rotation;

3. the rotary type structure is formed only by matching the set screw, the annular hole and the threaded hole I, and the rotary type structure is simple in structure and flexible in design;

4. the arrangement of the limiting screws at the upper end and the lower end avoids the tooth plate from being separated due to misoperation, and meanwhile, the tooth plate is convenient to replace.

Drawings

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

FIG. 2 is a schematic view of the assembly principle of the present invention;

in the figure: 1. dental lamina, 2, stop screw, 3, toothholder, 4, arc surface I, 5, arc surface II, 6, jaw, 7, screw hole II, 8, step, 9, screw hole I, 10, holding screw, 11, arc surface III, 12, spacing boss, 13, annular hole, 14, dental lamina groove.

Detailed Description

The technical scheme of the invention is clearly and completely described below with reference to the accompanying drawings.

Referring to fig. 1 and 2, a novel jaw device of a double-pipe pliers is shown, which comprises a dental plate 1, a dental base 3 and a jaw plate 5. The front end face of the tooth holder 3 is symmetrically provided with tooth plate grooves 14, the top and the bottom in the tooth plate grooves 14 are symmetrically provided with threaded holes II 7, the threaded holes II 7 are both fixed with limit screws 2, and the tooth plate 3 is clamped and fixed in the tooth plate grooves 14 through the limit screws 2 at the upper end and the lower end; it is relative with it, the back of toothholder 3 is formed with the arc surface I4 of evagination formula, the arc surface II 5 of one side formation indent formula that jaw 6 is close to toothholder 3, leave the clearance between arc surface I4 and the arc surface II 5, the upper and lower both ends symmetry at arc surface I4 middle part is concave to be equipped with step 8, the upper and lower both ends at arc surface II 5 middle part are all outwards the level protruding be equipped with step 8 complex spacing boss 12, be formed with the arc surface III 11 of indent formula between the spacing boss 12 at upper and lower both ends, it does not leave the clearance to equally divide between spacing boss 12 and the step 8, toothholder 3 is connected with spacing boss 12 along the relative rotation of horizontal direction through step 8 with spacing boss 6.

Wherein, spacing boss 12 and jaw 6 are an overall structure, annular hole 13 has all been seted up to the intermediate position that spacing boss 12 is close to jaw 6 one side, set up on the horizontal plane of step 8 with the threaded hole I9 that annular hole 13 corresponds the setting from top to bottom, it is connected with holding screw 10 to equally divide between threaded hole I9 and the annular hole 13 respectively, the one end rotation of holding screw 10 is connected in annular hole 13, thereby holding screw 10's the other end and threaded hole I9 screw-thread fit fixed connection.

When the device is installed, firstly, the dental plate 1 is placed in the dental plate groove 14 of the dental base 3, and then the dental plate 1 is fixed through the limiting screw 2; then, the steps 8 at the upper end and the lower end of the toothholder 3 are clamped between the limiting bosses 12 at the upper end and the lower end of the jaw plate 6, the mounting position is fixed by the set screws 10, and gaps are reserved between the arc surface I4 of the toothholder 3 and the arc surface II 5 of the jaw plate 6, and between the steps 8 at the upper end and the lower end of the toothholder 3 and the limiting bosses 12 at the upper end and the lower end of the jaw plate 6. When the eccentric pipe column is clamped, the tooth holder 3 can rotate for a certain angle relative to the jaw plate 6 through the rotating fit of the set screw 10 in the annular hole 13, so that the position of the jaw plate 1 is adjusted, and finally the slip of the casing tongs is avoided.

Claims

1. The utility model provides a novel sleeve pipe pincers jaw board device, includes dental lamina, toothholder and jaw board, the preceding terminal surface of toothholder is arranged in to the toothholder card, a serial communication port, the back of toothholder is formed with arc surface I, the upper and lower both ends symmetry at I middle part of arc surface is equipped with the step, the preceding terminal surface of jaw board forms arc surface II, the upper and lower both ends symmetry at II middle parts of arc surface is equipped with the spacing boss with step complex, the toothholder passes through step and spacing boss and rotates relatively along the horizontal direction with the jaw board and is connected, the annular hole has all been seted up to the intermediate position that spacing boss is close to jaw board one side, set up on the step with the annular hole screw hole I that corresponds the setting from top to bottom, it does not be connected with holding screw to divide equally between screw hole I and the annular hole.

2. The novel casing pipe jaw plate device as claimed in claim 1, wherein one end of the set screw is rotatably connected with the annular hole, and the other end of the set screw is fixedly connected with the threaded hole I.

3. The novel jaw plate device of casing tongs as claimed in claim 1, wherein gaps are left between the circular arc surface i and the circular arc surface ii, and between the limiting boss and the step.

4. The novel jaw plate device for casing pipe tongs as claimed in claim 1, wherein the arc surface II is matched with the arc surface I, the arc surface I is a convex arc surface, and the arc surface II is a concave arc surface.

5. The novel jaw plate device of casing pipe tongs as claimed in claim 1, wherein a circular arc surface III is formed between the limiting bosses at the upper and lower ends, and the circular arc surface III is a concave circular arc surface.

6. The novel jaw plate device of a casing pipe clamp as claimed in claim 1, wherein the limiting boss and the jaw plate are integrally formed.

7. The novel jaw plate device of a casing pipe tong as claimed in claim 1, wherein the front end face of the die holder is symmetrically provided with die grooves, the top and the bottom in the die grooves are symmetrically provided with threaded holes II, the threaded holes II are provided with limit screws, and the die is clamped in the die grooves through the limit screws.