CN201632962U - Pipe wrench with arc-shaped distribution of teeth - Google Patents

Abstract

The utility model relates to a pipe wrench with arc-shaped distribution of pincer teeth, which comprises a pincer head, a pincer bottom tooth plate, an elastic pin, an adjusting nut and a pliers body. , There are arc-distributed jaws on the arc edge, the adjusting nut connects the pincer head and the pincer body together, the tooth plate at the bottom of the pincer is positioned by the steps and fixed with the front end of the pincer body by the elastic pin. Arc distribution The arc of the jaws is manufactured according to the series of circular pipe diameters, and the jaws with different arc distributions are used for different pipe diameters. By changing the structure of the clamp teeth, the pipe wrench changes the flat-shaped clamp teeth into arc-shaped distribution clamp teeth that match the diameter of the pipe, so that the clamp teeth and the round pipe change from two-line contact to multi-line contact during the unscrewing process. Stressed state, to avoid slipping and pipe deformation, to ensure efficient and safe use of pipe wrench. The pipe wrench has simple structure, serialized products, and is easy to use. It is most suitable for industries that have little change in pipe diameter during installation and disassembly, and have special control over pipe diameter.

Description

Pipe wrench with arc-shaped distribution of teeth

Technical field

The utility model relates to a pipe wrench with arc-shaped distribution of pincer teeth, which is a tool for unscrewing various round pipes and belongs to the engineering field.

Background technique

Pipe wrench is an essential tool for unscrewing various steel pipes such as plumbing pipes, civil gas pipes, and drill pipes in the drilling industry. However, most of the currently used pipe wrench teeth are of a flat-plate distribution structure. During the unscrewing process, due to the defects in the structure of the tong teeth, it is easy to slip when unscrewing the steel pipe, which makes the unscrewing efficiency low, and the tongs often damage the surface of the steel pipe or the force is applied. When it is too large, the steel pipe will be flattened. Especially in the drilling industry, the pipe wrench with flat jaws will do more harm to the pipe when unscrewing. For example, the drill pipe of rope core drilling is due to the input, the pipe wall is generally thin, and when unscrewing with a pipe wrench, due to the limitation of the arrangement of the jaws of the pipe wrench, the two-wire clamping method is basically used to clamp the drilling tool, which is very easy to clamp and deform the drill pipe joint, resulting in rope removal. The inner pipe assembly of the core drilling tool cannot be put in and salvaged smoothly, so the drill pipe has to be scrapped, resulting in economic losses. Especially with the increase of the drilling depth, the drill pipe will be tightened under the compound action of various loads, which will increase the torque required to untie the drill pipe and make the drill pipe deform during the unscrewing process. The problem is more prominent, and when it is serious, it will affect the normal operation of drilling.

Contents of the invention

The purpose of the utility model is to provide a pipe wrench which can overcome the deficiencies of the prior art, and has a simple structure, easy manufacture, low price, convenient use, high unscrewing efficiency and small pipe deformation.

In order to achieve the above purpose, the utility model provides a pipe wrench with arc-shaped distribution of pincer teeth, including a pincer head, a pincer bottom tooth plate, an elastic pin, an adjusting nut and a pliers body, and the jaws of the pincer head and the pincer bottom tooth plate are circular It is arc-shaped, and there are upper and lower symmetrical arc-distributed jaws on the arc edge. The adjusting nut connects the pincer head and the pincer body.

The circular radians of the arc-distributed jaws are manufactured according to the series of circular pipe diameters, and different pipe diameters use different arc-distributed jaws. That is to say, the pipe wrench with arc-shaped distribution of clamp teeth of the utility model is made of multiple specifications series of clamp teeth with different arc distributions. When installing and dismounting pipe diameters of different specifications, it is necessary to replace the same specification according to the pipe diameter specifications. The pipe wrench makes the arc-shaped distribution of the jaws contact the round pipe to the maximum extent.

The pipe wrench of the utility model with arc-shaped distribution of clamp teeth needs to be replaced with a pipe wrench of the same specification according to the unscrewed pipe diameter specification during use, so that the arc-shaped distribution of clamp teeth can contact the round pipe to the maximum extent, and the existing pipe wrench can be changed The contact surface between the pincer teeth and the tube is very small when the flat-shaped distribution of pincer teeth unscrews the round tube, too few force points are easy to slip, which affects the unscrewing efficiency, and the round tube is easy to be clamped and deformed and cannot be used normally.

The rotating adjustment nut of the utility model can change the distance between the pliers head and the tooth plate at the bottom of the pliers, and clamp the workpiece between the pliers head and the tooth plate at the bottom of the pliers.

The pipe wrench with arc-shaped distribution of the teeth of the utility model has the following advantages:

1. The utility model is mainly by changing the structure of the clamp teeth, changing the flat clamp teeth into arc-shaped distribution clamp teeth matching the outer dimensions of the round pipe, so that the clamp teeth and the unscrewed pipe during the unscrewing process can be separated from each other. Two-wire contact becomes multi-wire contact. By changing its stress state, it avoids slipping and flattening the pipe, ensures the efficient and safe use of the pipe wrench, reduces the damage to the pipe caused by the pipe wrench, and reduces economic losses.

2. The pipe wrench of the utility model has a simple structure, is easy to produce in series, and is easy to use. It is mainly used for unscrewing and unloading various steel pipes. It is most suitable for installation and disassembly with little change in pipe diameter and special control over pipe diameter deformation. industry use.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of a pipe wrench with arc-shaped distribution of pincer teeth of the utility model.

Fig. 2 is a cross-sectional view of a pipe wrench with arc-shaped distribution of pincer teeth of the utility model.

Figure 3 is a schematic diagram of the structure of the clamp head.

Fig. 4 Schematic diagram of the structure of the tooth plate at the bottom of the pliers.

Figure 5 is a top view of the tooth plate at the bottom of the pliers.

Among the above-mentioned figures: 1 is the pliers head, 2 is the tooth plate at the bottom of the pliers, 3 is the elastic pin, 4 is the adjusting nut, and 5 is the pliers body.

Detailed ways:

Embodiment 1: The utility model is a pipe wrench with arc-shaped distribution of pincer teeth, and the overall structure is shown in Figures 1 and 2. Including pliers head 1, pliers bottom tooth plate 2, elastic pin 3, adjustment nut 4 and pliers body 5, the bayonet of the pliers head and the pliers bottom tooth plate are arc-shaped, and there are vertically symmetrical arc distribution on the arc edge. The pliers teeth and the adjusting nut connect the pliers head with the pliers body, and the tooth plate at the bottom of the pliers is positioned by steps and fixed with the front end of the pliers body by elastic pins.

The utility model is a pipe wrench with arc-shaped distribution of clamp teeth, which is made of multiple specifications and series of clamp teeth with different arc distributions. When installing and dismounting pipe diameters of different specifications, it is necessary to replace pipe clamps of the same specification according to the pipe diameter specifications. , so that the arc-shaped distribution of the jaws can contact the round pipe to the maximum extent.

The pipe wrench of the utility model has a simple structure, is easy to produce in series, and is convenient to use. It is used for unscrewing and unscrewing various steel pipes, and is most suitable for use in industries where the diameter of the installation and disassembly does not change much and has special control over the deformation of the pipe diameter. .

Claims (2)

1. A pipe wrench with arc-shaped distribution of jaws, comprising a clamp head, a bottom jaw plate, an elastic pin, an adjustment nut and a pliers body, characterized in that: the jaw bayonet of the pincer head and the bottom jaw plate are arc-shaped, There are upper and lower symmetrical arc-distributed jaws on the arc edge, the adjusting nut connects the pincer head and the pincer body together, the tooth plate at the bottom of the pincer is positioned by steps and fixed with the front end of the pincer body by elastic pins. 2. The pipe wrench with arc-shaped distribution of clamping teeth according to claim 1, characterized in that: the circular arc of the circular-arc distribution of clamping teeth is made according to the series of circular pipe diameter specifications, and different pipe diameters adopt different circles. Jaw teeth with arc distribution.

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