CN204221682U - Wrench for steel tube - Google Patents

Abstract

The utility model provides a kind of wrench for steel tube, easily prizes more thick and heavy steel pipe, and is not easy in using to damage tube wall.It comprises wrench body, and described wrench body comprises handle and is arranged at the pulling teeth of handle end, and it is characterized in that: described pulling teeth is arc, the arcwall face of two described arc pulling teeth is concentric circle arc plane, and described arc surface and steel pipe cross section are the same center of circle.

Description

Wrench for steel tube

Technical field

The utility model relates to instrument used when outer surface of steel tube is checked, and is specially wrench for steel tube.

Background technology

Need to carry out 360 degree all-round inspection to outer surface of steel tube in steel pipe's production, need in the process to rotate steel pipe, the existing spanner prizing steel tube place, see shown in Fig. 1, Fig. 2, spanner 1 one-tenth F shape, thin gear piece 3 on spanner 1, thin gear piece 4 block steel pipe walls and implement to rotate to steel pipe, this structure is not easy to prize for thick and heavy steel pipe, and adopt thin gear piece easily to make stress concentrate, also steel pipe wall is easily damaged in using, this steel pipe is required high, do not allow tube wall to have in the production operation of damage, just not too applicable.

Summary of the invention

For prior art Problems existing, the utility model provides a kind of wrench for steel tube, easily prizes more thick and heavy steel pipe, and is not easy in using to damage tube wall.

Its technical scheme is like this, it comprises wrench body, and described wrench body comprises handle and is arranged at the pulling teeth of handle end, it is characterized in that: described pulling teeth is arc, the arcwall face of two described arc pulling teeth is concentric circle arc plane, and described arc surface and steel pipe cross section are the same center of circle.

After the utility model adopts said structure, the contact of pulling teeth and steel pipe walls is improved to face by existing point cantact and contacts, stress surface is large, frictional force is also large, more easily prize thick and heavy steel pipe, and the arcwall face of pulling teeth and the same center of circle of steel pipe cross section, be so in use just not easy to be damaged to steel pipe walls, the reliability therefore used is stronger.

Accompanying drawing explanation

Fig. 1 is the structural representation of prior art;

Fig. 2 is prior art operating diagram;

Fig. 3 is side-looking structural representation of the present utility model;

Fig. 4 is the sectional view of Fig. 3;

Fig. 5 is utility model works schematic diagram;

Fig. 6 is the utility model rearview.

Detailed description of the invention

See Fig. 3, Fig. 4, Fig. 5, Fig. 6, the utility model comprises wrench body 1, wrench body 1 comprises handle 2 and is arranged at pulling teeth 3, the pulling teeth 4 of handle end, pulling teeth 3, pulling teeth 4 are arc, the arcwall face of pulling teeth 3 and pulling teeth 4 is concentric circle arc plane, and arc surface and steel pipe 5 cross section of pulling teeth 3, pulling teeth 4 are the same center of circle.During work, make steel pipe walls be stuck between pulling teeth 3 and pulling teeth 4, use handle 2 can prize steel pipe 5.

Claims (1)

1. wrench for steel tube, it comprises wrench body, and described wrench body comprises handle and is arranged at the pulling teeth of handle end, it is characterized in that: described pulling teeth is arc, the arcwall face of two described arc pulling teeth is concentric circle arc plane, and described arc surface and steel pipe cross section are the same center of circle.