CN2292639Y - Pipe wrench - Google Patents

Abstract

The utility model relates to a pipe wrench which is provided with a wrench head and a wrench handle, wherein, the wrench head is hinged and connected in a slot on the front end of the wrench handle by a rotating shaft to form a mutually rotating body. The inner side of the front end of the wrench head is provided with fixed wrench teeth, and the front surface of the wrench handle is provided with movable wrench teeth which are inclined outwards. The back end of the wrench head is also provided with a stopping pin, and a sliding positioning and adjusting block is also arranged on the wrench handle. The utility model has the advantages of simple and reasonable structure, small volume, light weight, high self-locking and clamping performance, high torsional strength and high safety. The utility model can be widely suitable for the disassembling and assembling work of various pipelines.

Description

A kind of pipe wrench

The utility model relates to a kind of hand tools, specifically a kind of pipe wrench.

We know, oil, chemical industry use the toggle machine to unscrew and when tightening pipeline, an oil pipe wherein be fixed, and pipe wrench is the instrument of an indispensability.At present, generally the pipe vice of Shi Yonging is made up of moving jaw, adjusting nut, pincers handle body, and moving jaw is contained in the pincers cover of pincers handle body by adjusting nut, rotates adjusting nut, and moving jaw is elongated or shortened on the pincers handle, adjusts jaw size with this.This pipe vice volume is big, Heavy Weight, and torsional strength is low, during use, fracture often occurs, and crooked and nut, screw thread are out of shape, and the phenomenon that can not regulate is again brought many inconvenience to work.At present, the various self-tightening pipe vices that occur on the market all are the introversion formulas, as the pipe vice that patent 9,222,710 9.7 is announced, it is made up of binding clip, handle, bearing pin, the movable tooth introversion on the handle, handle is firmly inboard to jaw during use, utilizes lever principle, produces clamping force, have simple in structurely, easy to use, adjust the advantage of jaw size automatically, but self-locking clamps poor performance, clamping force is uncontrollable, the phenomenon of oil pipe can occur damaging, and is modern for extremely also there not being the external inclined type pipe wrench.

The purpose of this utility model is exactly in order to overcome the deficiency of above-mentioned prior art, provides a kind of simple and reasonable for structure, easy to adjust, in light weight, and it is good that self-locking clamps performance, torsional strength height, the novel pipe wrench that clamping force can be effectively controlled.

For achieving the above object, a kind of pipe wrench, it is provided with binding clip, pincers handle, binding clip is hinged in the groove of pincers handle front end by rotating shaft, constitute mutual rotor, it is characterized in that inboard, binding clip front end termination is equipped with fixing pincers tooth, pincers handle front end is provided with the adjustable clamp tooth, adjustable clamp tooth flare, the binding clip rear end is provided with a backing pin.

The utility model is because pincers handle front end is provided with external inclined type adjustable clamp tooth, during use the pincers handle to the jaw outside firmly, external inclined type adjustable clamp tooth cooperates with fixedly pincers tooth on the binding clip, clamping conveniently, self-locking clamping performance is good.The utility model also is provided with a slip positioning adjust block on the pincers handle, it is to be fixed in the groove of pincers handle side by two clamping plate, positioning adjust block bottom surface and pincers handle are provided with the slip teeth of mutual interlock, positioning adjust block can move forward and backward along the groove and the slip teeth of pincers handle both sides, during use, itself and binding clip rear end backing pin cooperatively interact, and regulate the size of clamping claw, the unlimited generation of control clamping force.The hinge point of the utility model binding clip and pincers handle can be provided with a plurality of, as can on binding clip and pincers handle, establishing several hinge adjustment holes, also can on the pincers handle, chute hole be set, can enlarge the adjusting range of pipe wrench jaw size like this, to satisfy being fixedly clamped of various oil pipes.

The utility model is rational in infrastructure, and is easy to adjust, the torsional strength height, it is good that self-locking clamps performance, and the scope of application is wide, can prevent the phenomenon that clamping force is crossed the major injury oil pipe, can be widely used in oil, chemical industry and the cooperation of toggle machine and play back of the body use, safe and reliable.

Below in conjunction with accompanying drawing the utility model is described further:

Fig. 1 is the utility model structural representation.

As can be seen from Figure 1, a kind of pipe wrench, it is provided with binding clip 2, pincers handle 9, and binding clip 2 is camber, and its inboard, front is provided with fixing pincers tooth 1, and pincers handle 9 front outers are provided with adjustable clamp tooth 3, and adjustable clamp tooth 3 is an external inclined type convex arc tooth.Fixing pincers tooth 1 and binding clip 2, adjustable clamp tooth 3 all adopts the chase mortise formula to combine with pincers handle 9, and fixing pincers tooth and adjustable clamp tooth can conveniently be regulated replacing.During use, the two cooperatively interacts, and in order to clamp pipe fitting, prevents that pipe fitting from sliding.The utility model binding clip 2 is hinged in the groove of pincers handle front end by rotating shaft 11, constitutes mutual rotor, and rotating shaft 11 is exactly to clamp the bolster that handle 9 rotates.During use, binding clip entangles pipe fitting, the toggle machine rotates oil pipe, pincers handle 9 to the jaw outside is firmly fixed pincers tooth and adjustable clamp between cog like this and has just been formed self-locking clamping force and moment of torsion, and the oil pipe rotatory force is big more, clamping force and moment of torsion are just big more, in order to prevent that clamping force from crossing major injury oil pipe surface, the utility model is provided with a backing pin 4 in the binding clip rear end, and pincers handle 9 is provided with a slip positioning adjust block 5.Positioning adjust block 5 adopts the wedge type, its both sides are equiped with clamping plate 6, clamping plate 6 bottoms are provided with the convex edge, pincers both sides, handle 9 top are provided with long strip type groove 8, positioning adjust block 5 is fixed on the groove 8 of pincers handle by clamping plate 6, be respectively equipped with slip teeth 7 on positioning adjust block 5 bottoms and the pincers handle, positioning adjust block 5 can move forward and backward along slip teeth 7 and groove 8, according to the pipe fitting diameter, determine the position of positioning adjust block 5, itself and backing pin 4 cooperatively interact, and regulate jaw size, block pincers handle 9 and be rotated further, the control clamping force continues to produce.

The utility model is in order to enlarge the adjusting range of jaw size, maximum magnitude satisfies the use of various pipe fittings, on pincers handle 9 and binding clip 2, be respectively equipped with two hinge adjustment holes, change the hole by rotating shaft like this, can form four hinge supporting-points altogether, be used for regulating the size of jaw, satisfy the needs that various pipe fittings use.

Novel pincers handle and the adjustable clamp tooth that has adopted external inclined type of this reality, it cooperates with the fixedly pincers tooth of binding clip, and self-locking clamps the performance height, is useful in oil, chemical industry and cooperates the toggle machine to beat the back of the body to use, and more easy to adjust than existing pipe vice, torsional strength is big.

Be equipped with on the utility model pincers handle 9 and add long handle connection screw rod 10, little at moment of torsion, need not beat unlucky, on the pincers handle adjunction add long handle just can be as hand tools use, can do the back-up tong use so the utility model reaches, also can do the hand tools use of unscrewing or tightening pipe.

The utility model is simple in structure, and rationally, volume is little, and is in light weight, and self-locking clamps the performance height, and torsional strength is big, and is safe and reliable, is suitable for the dismounting operation of various pipelines widely.

Claims (5)

1, a kind of pipe wrench, it is provided with binding clip, pincers handle, and binding clip is hinged in the groove of pincers handle front end by rotating shaft, constitute mutual rotor, it is characterized in that inboard, binding clip front end termination is equipped with fixing pincers tooth, pincers handle front end is provided with the adjustable clamp tooth, adjustable clamp tooth flare, the binding clip rear end is provided with a backing pin.

2, pipe wrench as claimed in claim 1 is characterized in that said adjustable clamp tooth is an external inclined type convex arc tooth.

3, pipe wrench as claimed in claim 1 is characterized in that being respectively equipped with the adjustment hole that is hinged on two on said binding clip and the pincers handle.

4, pipe wrench as claimed in claim 1 is characterized in that also being provided with on the said pincers handle location regulating block, and positioning adjust block is fixed on by clamping plate in the groove of pincers handle side, and its bottom surface and pincers handle are provided with the slip teeth of mutual interlock.

5, pipe wrench according to claim 1 is characterized in that said pincers handle rear end is provided with one and adds the long handle connecting screw rod.