CN211939799U

CN211939799U - Back-up tong head clamping mechanism of non-tooth-mark pipe twisting machine

Info

Publication number: CN211939799U
Application number: CN202020385071.9U
Authority: CN
Inventors: 吴立中; 吴水康; 徐宏; 张锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-08
Filing date: 2020-03-24
Publication date: 2020-11-17
Anticipated expiration: 2030-03-24

Abstract

The utility model relates to a back tong binding clip clamping mechanism of a toothless trace pipe twisting machine, which comprises a hollow shell, a sliding seat fixedly connected with the bottom end part of the shell and a guide rail arranged along the feeding direction of a pipe column; the casing comprises side plates positioned on two sides of the casing, a ring gear and a plurality of tooth blocks are arranged in the casing, each tooth block comprises a clamping part for clamping the pipe column and an installation part opposite to the clamping part, and the installation part can move along the radial direction of the ring gear and is installed between the two side plates; the inner ring surface of the ring gear is provided with pits with the same number as the tooth blocks, and the shell is also provided with a hydraulic oil cylinder for driving the ring gear to rotate; the clamping part of the tooth block is arc-shaped, and the clamping surface is a flat surface. This application structure is simple and easy, easy operation, can not cause the damage to the lateral surface of tubular column moreover, reaches the effect of no trace centre gripping.

Description

Back-up tong head clamping mechanism of non-tooth-mark pipe twisting machine

Technical Field

The utility model relates to a quick-witted technical field is twisted to the pipe, concretely relates to quick-witted back of body pincers binding clip clamping mechanism is twisted to no tooth trace pipe.

Background

A screwing device is a device for screwing a screw nut or screwing other components, and has various forms, and the screwing of large components usually needs a special screwing device for screwing or unscrewing.

The structure of the existing pipe twisting machine generally comprises a frame, a guide rail arranged on the frame, back tongs arranged on the guide rail and main tongs fixedly arranged on the frame. The back-up wrench comprises a moving seat and a hydraulic device for driving the moving seat to move, the moving seat is connected with the guide rail in a sliding way and can move longitudinally on the guide rail, and the purpose of screwing on and off the sucker rods with different lengths and disassembling and assembling a coupling is achieved. However, the existing pipe twisting machine is generally complex in structure and inconvenient to operate.

In order to match the clamping of the cylindrical body, the pipe screwing machine generally clamps the pipe string using a tooth block having an arc-shaped clamping surface. Current tooth piece all has the chute of seting up on the clamping face, and the purpose of chute mainly is the friction between increase holder and the tubular column, guarantees to press from both sides tightly reliably, but current tooth piece is behind the centre gripping processing, can leave the indentation that has certain degree of depth at the tubular column surface, and this surface that means the tubular column appears damaging, can influence the performance of tubular column.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a no tooth trace pipe screwing machine back of body pincers binding clip clamping mechanism that simple structure, easy operation to the not enough among the prior art.

The purpose of the utility model is realized through the following technical scheme: the application provides a back tong head clamping mechanism of a toothless mark pipe twisting machine, which comprises a hollow shell, a sliding seat fixedly connected to the bottom end part of the shell and a guide rail arranged along the feeding direction of a pipe column, wherein the sliding seat is connected with the guide rail in a sliding manner, and the shell is also provided with a hydraulic device for driving the shell to move along the guide rail; the casing comprises side plates positioned on two sides of the casing, a ring gear and a plurality of tooth blocks are arranged in the casing, each tooth block comprises a clamping part for clamping the pipe column and an installation part opposite to the clamping part, and the installation part can move along the radial direction of the ring gear and is installed between the two side plates; the inner ring surface of the ring gear is provided with pits with the same number as the tooth blocks, and the shell is also provided with a hydraulic oil cylinder for driving the ring gear to rotate; a plurality of tension springs are uniformly distributed on the outer side surface of the side plate, one end of each tension spring is fixedly connected with one tooth block, and the other end of each tension spring is fixedly connected with the side plate; the clamping part of the tooth block is arc-shaped, and the clamping surface is a flat surface.

Wherein, the number of the tooth blocks is three.

The installation part is arranged in an arc shape, a bolt penetrates through the installation part, and guide grooves for inserting the bolt are formed in the inner side surfaces of the two side plates; in an assembled state, both end portions of the latch are inserted into the guide grooves of the two side plates, respectively.

Wherein, each tooth piece all corresponds and is provided with the extension spring that two symmetries were arranged.

The guide rail is characterized in that sliding plates are respectively arranged on two sides of the sliding seat, the upper end of each sliding plate is fixedly connected with the sliding seat, guide wheels are fixedly mounted at the lower end of each sliding plate through rotating shafts, and a sliding groove for the guide wheels to insert is formed in one outward side of the guide rail.

The utility model provides a no tooth trace pipe screwing machine back of body pincers binding clip clamping mechanism, its easy operation, structure are simple and easy, make the clamping face and by the friction between the centre gripping tubular column and damage eliminated through setting up the clamping face into flat surface moreover, have improved the life of tubular column and holder.

Drawings

The present invention is further explained by using the drawings, but the embodiments in the drawings do not constitute any limitation to the present invention, and for those skilled in the art, other drawings can be obtained according to the following drawings without any inventive work.

Fig. 1 is a schematic structural diagram of the toothless pipe twisting machine of the present application.

Fig. 2 is a schematic structural diagram of the back-up tong of the present application.

Figure 3 is a cross-sectional view of a back-up tong according to the present application.

Fig. 4 is a schematic structural diagram of a dental block according to the present application.

Fig. 5 is an enlarged view of a portion a in fig. 2.

Detailed Description

The invention will be further described with reference to the following examples.

The utility model discloses a no tooth trace pipe screwing machine back of body pincers binding clip clamping mechanism's embodiment, as shown in fig. 1-2, including hollow casing 11, rigid coupling in casing 11 bottom portion's sliding seat 14 and along the guide rail 3 that the tubular column feed direction set up. The sliding seat 14 is slidably connected to the guide rail 3, specifically, sliding plates 15 are respectively disposed on two sides of the sliding seat 14, an upper end of each sliding plate 15 is fixedly connected to the sliding seat 14, a guide wheel 16 is fixedly mounted on a lower end of each sliding plate 15 through a rotating shaft, and a sliding slot 31 for inserting the guide wheel 16 is disposed on one outward side of the guide rail 3. The housing 11 is also provided with hydraulic means (not shown in the figures) for driving it along the guide 3.

In the present embodiment, referring to fig. 2, the housing 11 includes side plates 12 at both front and rear sides thereof. Referring to fig. 2 to 4, a ring gear 19 and three blocks 18 are provided inside the housing 11, each block 18 includes a gripping portion 182 for gripping the pipe string and a mounting portion 181 opposite to the gripping portion 182, and the mounting portion 181 is movable in a radial direction of the ring gear 19 and is mounted between the two side plates 12. Specifically, the mounting portion 181 may be disposed in an arc shape, a bolt is inserted into the mounting portion 181, guide grooves for inserting the bolt are formed in inner side surfaces of the two side plates 12, and two end portions of the bolt are respectively inserted into the guide grooves of the two side plates 12 in an assembled state. The guide groove is formed in an elongated shape so as to allow the tooth block 18 to move linearly.

Referring to fig. 3, the ring gear 19 has recesses 20, the number of which is the same as the number of the teeth 18, formed in an inner circumferential surface thereof, and the mounting portions 181 of the teeth 18 abut against bottom surfaces of the recesses 20 in the standby state. In order to solve the problem that the conventional clamping assembly damages the outer surface of the pipe column, the clamping part 182 of the tooth block 18 is arc-shaped, and the clamping surface 183 is a flat surface, so that the outer side surface of the pipe column is not damaged, and the traceless clamping effect is achieved. The housing 11 is further provided with a hydraulic oil cylinder 13 for driving the ring gear 19 to rotate, and the output end of the hydraulic oil cylinder 13 is fixedly connected with a gear set meshed with the ring gear 19.

Referring to fig. 2 and 5, in order to enable the tooth block 18 to return normally, a plurality of tension springs 17 are uniformly distributed on the outer side surface of the side plate 12, one end of each tension spring 17 is fixedly connected with one tooth block 18, and the other end of each tension spring 17 is fixedly connected with the side plate 12. Preferably, in order to balance the tension applied to the tooth blocks 18, two symmetrically arranged tension springs 17 are correspondingly disposed on each tooth block 18.

The working process of the back-up tong binding clip clamping mechanism of the non-tooth trace pipe twisting machine is as follows: in a standby state, the tension spring 17 drives the mounting part 181 of the tooth block 18 to abut against the bottom surface of the pit 20, the feeding side of the back-up wrench 1 extends into a pipe column, then the hydraulic oil cylinder 13 is started, the hydraulic oil cylinder 13 drives the ring gear 19 to rotate, the ring gear 19 rotates, so that the pit 20 on the inner ring surface of the ring gear applies thrust to the mounting part 181 of the tooth block 18, the mounting part 181 is moved along the radial direction of the ring gear 19 under the thrust provided by the ring gear 19, and the hydraulic oil cylinder 13 is stopped after the mounting part 181 of the tooth block 18 is completely separated from the pit 20. In the process of converting from the standby state to the clamping state, the plurality of tooth blocks 18 move inwards and clamp the workpiece, and finally, the hydraulic device drives the moving seat to move, so that the pipe column is conveyed to the screwing station. In the process of converting the clamping state into the standby state, the hydraulic oil cylinder 13 drives the ring gear 19 to rotate reversely, the tension spring 17 on the side plate 12 can pull the tooth block 18 to return until the mounting part 181 of the tooth block 18 falls into the pit 20 again, and the hydraulic oil cylinder 13 stops working.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a no tooth trace pipe screwing machine back of body pincers binding clip clamping mechanism which characterized in that: the device comprises a hollow shell, a sliding seat fixedly connected to the bottom end part of the shell and a guide rail arranged along the feeding direction of a pipe column, wherein the sliding seat is connected with the guide rail in a sliding manner, and the shell is also provided with a hydraulic device for driving the shell to move along the guide rail;

the casing comprises side plates positioned on two sides of the casing, a ring gear and a plurality of tooth blocks are arranged in the casing, each tooth block comprises a clamping part for clamping a pipe column and an installation part opposite to the clamping part, and the installation part can move along the radial direction of the ring gear and is installed between the two side plates; the inner ring surface of the ring gear is provided with pits with the same number as the tooth blocks, and the shell is also provided with a hydraulic oil cylinder for driving the ring gear to rotate; a plurality of tension springs are uniformly distributed on the outer side surface of the side plate, one end of each tension spring is fixedly connected with one tooth block, and the other end of each tension spring is fixedly connected with the side plate; the clamping part of the tooth block is arc-shaped, and the clamping surface of the tooth block is a flat surface.

2. The back-up tong head clamping mechanism of the pipe twisting machine without tooth marks as claimed in claim 1, characterized in that: the number of the tooth blocks is three.

3. The back-up tong head clamping mechanism of the pipe twisting machine without tooth marks as claimed in claim 1, characterized in that: the mounting part is arranged in an arc shape, a bolt penetrates through the mounting part, and guide grooves for the bolt to insert are formed in the inner side surfaces of the two side plates; in an assembled state, both end portions of the latch are inserted into the guide grooves of the two side plates, respectively.

4. The back-up tong head clamping mechanism of the pipe twisting machine without tooth marks as claimed in any one of claims 1 to 3, wherein: each tooth block is correspondingly provided with two symmetrically arranged tension springs.

5. The back-up tong head clamping mechanism of the pipe twisting machine without tooth marks as claimed in any one of claims 1 to 3, wherein: the two sides of the sliding seat are respectively provided with a sliding plate, the upper end part of the sliding plate is fixedly connected with the sliding seat, the lower end part of the sliding plate is fixedly provided with a guide wheel through a rotating shaft, and one outward side of the guide rail is provided with a sliding groove for the guide wheel to insert.

6. The back-up tong head clamping mechanism of the pipe twisting machine without tooth marks as claimed in claim 4, characterized in that: the two sides of the sliding seat are respectively provided with a sliding plate, the upper end part of the sliding plate is fixedly connected with the sliding seat, the lower end part of the sliding plate is fixedly provided with a guide wheel through a rotating shaft, and one outward side of the guide rail is provided with a sliding groove for the guide wheel to insert.