Английский для сварщиков. Гричин С.В. - 77 стр.

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77
a fuel gas to a life-support oxygen system or vice versa. The basic hose
connection consists of a nut and gland. The nut has threads on the inside that
match up with the male inlet and outlet on the torch and regulator. The gland
slides inside the hose and is held in place by a ferrule that has been crimped.
The nut is loose and can be turned by hand or a wrench to tighten the
threaded nut onto the equipment.
Another important item that is often overlooked is check valves. These
inexpensive valves prevent personal injuries and save valuable equipment
from flashbacks. When ordering, make sure you specify the type of gas,
connection size, and thread design. The check valves should be installed
between the torch connection and the hose.
Cutting Torches
The equipment and accessories for oxygas cutting are the same as for
oxygas welding except that you use a cutting torch or a cutting attachment
instead of a welding torch. The main difference between the cutting torch and
the welding torch is that the cutting torch has an additional tube for high-
pressure cutting oxygen. The flow of high-pressure oxygen is controlled from
a valve on the handle of the cutting torch. In the standard cutting torch, the
valve may be in the form of a trigger assembly like the one in figure below.
On most torches, the cutting oxygen mechanism is designed so the cutting
oxygen can be turned on gradually. The gradual opening of the cutting
oxygen valve is particularly helpful in operations, such as hole piercing and
rivet cutting.
Torch Body
Most welding
torches are designed
so the body of the
torch can accept either
welding tips or a
cutting attachment.
This type of torch is called a combination torch. The advantage of this type of
torch is the ease in changing from the welding mode to the cutting mode.
There is no need to disconnect the hoses; you just unscrew the welding tip
and then screw on the cutting attachment. The high-pressure cutting oxygen
is controlled by a lever on the torch handle, as shown in figure below.
Cutting Torch Tips
As in welding, you must use the proper size cutting tip if quality work is to
be done. The preheat flames must furnish just the right amount of heat, and
the oxygen jet orifice must deliver the correct amount of oxygen at just the
One piece oxygas cutting torch

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