CN204997583U

CN204997583U - Chain wrench

Info

Publication number: CN204997583U
Application number: CN201520762324.9U
Authority: CN
Inventors: 鲁鹏飞; 孙起昱; 董国庆; 赵研娜
Original assignee: Sinopec Oilfield Service Corp; Drilling Engineering Technology Research Institute of Sinopec Zhongyuan Petroleum Engineering Co Ltd
Current assignee: Sinopec Oilfield Service Corp; Drilling Engineering Technology Research Institute of Sinopec Zhongyuan Petroleum Engineering Co Ltd
Priority date: 2015-09-29
Filing date: 2015-09-29
Publication date: 2016-01-27
Anticipated expiration: 2025-09-29

Abstract

The utility model discloses a chain wrench is one kind and is difficult to skid, the manual chain wrench of centre gripping wide range, including pincers handle, arc binding clip, round pin axle, engaging tooth and chain. The engaging tooth on the pincers handle is connected to during operation, chain expansion end, and anticlockwise motion is done around the work piece to the pincers handle, and the pincers handle passes through the taut chain of chain round pin axle, and the chain is held the work piece jointly tightly with the arc binding clip and is done anticlockwise motion. This scheme installs the arc binding clip additional on traditional chain wrench's basis, reached to prevent the effect of skidding to be favorable to improving work efficiency.

Description

A kind of chain wrench

Technical field

The utility model relates to a kind of manual chain wrench, belongs to the device in petroleum exploration domain, screwed tubing string part being carried out to thread screw, is specially adapted to oil and enters the tubing of well and the handling screw thread of downhole tool.

Background technology

In oil-gas drilling, the normal mounting or dismounting using chain wrench to carry out drilling tool.

The chain wrench of current use is engaged with chain one end more piece by binding clip, the chain other end and binding clip afterbody hinged, pincers tooth binding clip is equipped with, engageable cylinder to be installed and removed.Gum face residing for the pincers tooth on current chain wrench binding clip is non-concave profile, causes that same time binding clip to be engaged cylindrical pincers tooth quantity few, easily skids, affects result of use.

Application number is: the Chinese utility model patent of 99215567.3 discloses the tooth-like chain wrench of a kind of cockscomb, and it is made up of clamp handle, tooth, chain, bearing pin, binding clip.Cause chain wrench less easily skid owing to same time binding clip being engaged cylindrical tooth numbers, reduce chain wrench practicality.

Utility model content

In view of this, the utility model provides a kind of chain wrench being not easy to skid.

For achieving the above object, the utility model provides following technical scheme:

A kind of chain wrench, comprise clamp handle, engaging tooth and chain, described engaging tooth is arranged on the side of the end of described clamp handle, also comprises arc binding clip, and described arc binding clip is arranged on the end of described clamp handle, and is positioned at the relative opposite side of described engaging tooth.

Preferably, the cambered surface of described arc binding clip is provided with pincers tooth.

Preferably, described pincers tooth is positioned in same circumference cambered surface.

Preferably, described arc binding clip is rotatably arranged in described clamp handle.

Preferably, described arc binding clip passes through binding clip hinge in described clamp handle.

Preferably, described arc binding clip is removably connected to described clamp handle.

Preferably, described arc binding clip and described clamp handle are integral type structure.

Preferably, described engaging tooth comprises multiple tooth be positioned in same circumference cambered surface.

As can be seen from above-mentioned technical scheme, the chain wrench that the utility model provides, the basis of traditional chain wrench installs additional arc binding clip, during work, the movable end of chain connects the engaging tooth in clamp handle, and clamp handle rotates around workpiece, and tensioning chain and arc binding clip hold workpiece motion s tightly jointly; Arc binding clip in this programme increases the contact area of chain wrench and workpiece, thus reaches the effect preventing from skidding, and is conducive to increasing work efficiency.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

The overall structure schematic diagram of the chain wrench that Fig. 1 provides for the utility model embodiment.

Wherein, 1 is clamp handle, and 2 is chain hinge pin, and 3 is arc binding clip, and 4 is binding clip bearing pin, and 5 is engaging tooth, and 6 is chain.

Detailed description of the invention

The utility model discloses a kind of chain wrench being not easy to skid.

Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.

Refer to Fig. 1, the overall structure schematic diagram of the chain wrench that Fig. 1 provides for the utility model embodiment.

The chain wrench that the utility model embodiment provides, comprise clamp handle 1, engaging tooth 5 and chain 6, wherein engaging tooth 5 is arranged on the side of the end of clamp handle 1, one end (stiff end) of chain 6 is hinged by chain hinge pin 2 and clamp handle 1, and the other end (movable end) engages clamping for same clamp handle 1; Its core improvement is, also comprises arc binding clip 3, and this arc binding clip 3 is arranged on the end of clamp handle 1, and is positioned at the relative opposite side of same engaging tooth 5; As shown in Figure 1, the cambered surface engaging tooth 5 dorsad of arc binding clip 3, for holding workpiece tightly.

As can be seen from above-mentioned technical scheme, the chain wrench that the utility model embodiment provides, the basis of traditional chain wrench installs additional arc binding clip 3, during work, the movable end of chain 6 connects the engaging tooth 5 in clamp handle 1, and clamp handle 1 rotates around workpiece, and tensioning chain 6 and arc binding clip 3 hold workpiece motion s tightly jointly; Arc binding clip 3 in this programme increases the contact area of chain wrench and workpiece, thus reaches the effect preventing from skidding, and is conducive to increasing work efficiency.

In the specific embodiment that this programme provides, the cambered surface of arc binding clip 3 is provided with pincers tooth, compared with smooth cambered surface, better can holds workpiece tightly, improve the effect preventing from skidding further.

As preferably, pincers tooth is positioned in same circumference cambered surface, and its structure with reference to shown in Fig. 1, can be specially adapted to cylindrical workpiece.Those skilled in the art can determine the specification and the arrangement mode that clamp tooth according to actual needs, do not do concrete restriction at this.

In order to optimize above-mentioned technical scheme further, arc binding clip 3 is rotatably arranged in clamp handle 1, so that operationally rotate as required, thus better holds workpiece tightly.Certainly, can also lock arc binding clip 3 in specific angle, prevent it from unnecessary rotation occurring.

In the specific embodiment that this programme provides, arc binding clip 3 is articulated with clamp handle 1 by binding clip bearing pin 4.

In order to optimize above-mentioned technical scheme further, arc binding clip 3 is removably connected to clamp handle 1.Arc binding clip 3 has different size, selects the arc binding clip 3 of different arc size, thus realize clamping range widely according to clamped cylindrical external diameter difference.

In the another kind of embodiment that this programme provides, arc binding clip 3 and clamp handle 1 can also be integral type structure, are applicable to the situation needing to bear larger torque.

As preferably, engaging tooth 5 comprises multiple tooth be positioned in same circumference cambered surface, to realize firmly engaging effect with chain 6, prevents from operationally departing from separately.

In sum, the chain wrench that the utility model embodiment provides is that one is not easy to skid, the manual chain wrench that clamping range is wide; Comprise clamp handle, arc binding clip, bearing pin, engaging tooth and chain.During work, chain movable end connects the engaging tooth in clamp handle, and clamp handle makes counterclockwise movement around workpiece, and clamp handle is by chain hinge pin tensioning chain, and chain and arc binding clip are jointly held workpiece tightly and made counterclockwise movement.This programme installs arc binding clip additional on the basis of traditional chain wrench, reaches the effect preventing from skidding, is conducive to increasing work efficiency.

In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.

To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims

1. a chain wrench, comprise clamp handle (1), engaging tooth (5) and chain (6), described engaging tooth (5) is arranged on the side of the end of described clamp handle (1), it is characterized in that, also comprise arc binding clip (3), described arc binding clip (3) is arranged on the end of described clamp handle (1), and is positioned at the relative opposite side of described engaging tooth (5).

2. chain wrench according to claim 1, is characterized in that, the cambered surface of described arc binding clip (3) is provided with pincers tooth.

3. chain wrench according to claim 2, is characterized in that, described pincers tooth is positioned in same circumference cambered surface.

4. chain wrench according to claim 1, is characterized in that, described arc binding clip (3) is rotatably arranged in described clamp handle (1).

5. chain wrench according to claim 1, is characterized in that, described arc binding clip (3) is articulated with described clamp handle (1) by binding clip bearing pin (4).

6. chain wrench according to claim 1, is characterized in that, described arc binding clip (3) is removably connected to described clamp handle (1).

7. chain wrench according to claim 1, is characterized in that, described arc binding clip (3) and described clamp handle (1) are integral type structure.

8. chain wrench according to claim 1, is characterized in that, described engaging tooth (5) comprises multiple tooth be positioned in same circumference cambered surface.