What types of pipe wrench are there? What is the working principle
When there is a problem with the water pipes at home, we can use a pipe wrench to unscrew the water pipe and install a new one. What are the common types of pipe wrenches? Does anyone know how it works? Today, the editor will introduce this information to you in detail.
How to use pipe wrench?
1. Choose appropriate specifications;
2. The opening of the clamp head should be equal to the diameter of the workpiece;
3. The pliers should clamp the workpiece tightly before pulling hard to prevent slipping;
4. When using a force rod, the length must be appropriate, and the force must not be excessive or exceed the allowable strength of the pipe wrench;
5. The teeth and adjusting ring of the pipe wrench should be kept clean;
6. General pipe wrenches cannot be used as hammers;
7. Workpieces whose temperature exceeds 300°C cannot be clamped;
8. The pipe wrench shall not have lines or burrs, and the surface shall not have obvious defects such as oxide scale, blisters, and pores. The surface roughness Ra value of the machined surfaces on both sides of the jaws should not be greater than 3.2 μm, and the Ra value of the machined surface roughness of the remaining parts should not be greater than 12.5 μm. The surface coating of the pliers handle body should be uniform and consistent in color, without obvious flow marks, delamination and other defects.
Precautions
Generally speaking, the taper of the jaws is used to increase the torque, usually the taper is between 3-8 degrees, and the pipe is clamped tightly to automatically adapt to different pipe diameters and automatically adapt to the plastic deformation caused by the stress exerted by the jaws on the pipe. Under the effect of reducing the pipe diameter, the torque is guaranteed without slipping. When using a pipe wrench, you should first check whether the fixing pins are firm and whether there are cracks in the pliers head and handle. Do not use those with cracks. For smaller pipe wrenches, do not use too much force, do not use an afterburner, and do not use the pipe wrench. Use as a hammer or crowbar. In addition, wash it promptly after use and apply butter to prevent the rotating nut from rusting.
How does a pipe wrench work?
The principle of clamping is to use a pipe wrench to tighten a pair of loose teeth before the force is applied. After the force begins, a synthetic loss force will be generated on the pipe wrench, which is the force of biting the pipe downward and the force of rotating the pipe wrench. They have different angles, and there is a positive correlation between bite force and rotational force.
Basic classification of pipe wrench
Pipe wrenches are divided into two grades: heavy-duty and ordinary according to their carrying capacity; they are divided into heavy-duty, heavy-duty and light-duty according to their weight; they are divided into English, American, German, Spanish, deflection, chain and eagle according to their styles. Double-mouthed pipe wrenches, etc.; according to the handle material, they are divided into aluminum alloy pipe wrenches, cast steel pipe wrenches, malleable steel pipe wrenches, ductile iron pipe wrenches, etc.
There are many types of pipe wrenches, and you can buy them according to your needs. If you don't know which one to buy, you can consult the editor. The editor will be very happy to answer your questions in this regard.
