Powder metallurgy cutting torch nozzle for machine cutting torch

Abstract

The invention discloses a powder metallurgy cutting torch nozzle for a machine cutting torch. The powder metallurgy cutting torch nozzle comprises a cutting torch nozzle jacket. A cutting torch nozzlebody is mounted at the rear end of the cutting torch nozzle jacket. A cutting torch nozzle core rod is mounted at the front end of the cutting torch nozzle body. The cutting torch nozzle core rod isfixed to the cutting torch nozzle body through cooperation of a conical surface. The rear end of the cutting torch nozzle body is provided with a conical mounting body mounted on a cutting torch nozzle mounting seat in a matched mode. A mounting sealing structure is mounted on the conical surface of the conical mounting body. The conical mounting body is further provided with a gas inlet premixingstructure communicating with a preheated gas mixing chamber. Through additional arrangement of the mounting sealing structure, the powder metallurgy cutting torch nozzle can effectively buffer impactand abrasion of the conical mounting body to the cutting torch nozzle mounting seat while ensuring the good sealing effect, the deformation of the cutting torch nozzle mounting seat is effectively reduced, and the service life of the cutting torch nozzle mounting seat is prolonged. Moreover, through combined application of the gas inlet premixing structure, the preheated gas mixing chamber and arotational flow device, the device realizes multistage mixing of mixed gas, so that the mixed gas is mixed more sufficiently, and the preheating effect of mixed gas is improved.

Description

Technical field [0001] The invention relates to the technical field of cutting torches, in particular to a powder metallurgy cutting nozzle for machine cutting torches. Background technique [0002] Gas cutting is carried out by the following method: injecting preheating gas formed by mixing fuel gas and oxygen from the gas cutting nozzle, and the preheating flame formed by combustion preheats the steel plate and other cut parts, and sends it to the fully preheated The cutting tool sprays cutting oxygen to burn the base material, and uses the spray energy to remove the molten base material and oxidation products. Then, by moving the gas cutting nozzle in the target direction while continuing the gas cutting, the cut piece can be cut into the target shape. [0003] The fuel gas for gas cutting includes acetylene gas, liquefied petroleum gas, natural gas, ethylene gas, hydrogen, etc. Each fuel gas has a dedicated cutting nozzle. The cutting nozzle is an important part of the cutting...

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Problems solved by technology

[0004] Figure 5 The structure of the commonly used machine-used cutting nozzle is shown at present, which consists of three parts: the outer casing of the cutting nozzle, the core rod of the cutting nozzle, and the main body of the cutting nozzle. The outer jacket is a split structure, which is installed by plugging; and the entire cutting nozzle in the prior art is machined with a whole piece of copper strip using a CNC machine tool, which has many processing procedures, high processing difficulty, and low raw material utilization rate. This makes the cost higher, especially when processing multiple gas channels, the shape of the hole is difficult to control, the workpiece defective rate is high, and the production cost is further increased; in addition, due to the soft material of red copper, the mechanical strength is poor, especially with cutting The tapered surface of the nozzle mounting seat is prone to deformation, which makes the service life of the cutting nozzle shorter; and in the prior art, in order to solve this problem, the mechanical strength is improved by chrome plating on the outer surface of the cutting nozzle, although its strength and hardness are improved, but due to Its operation is complicated, resulting in high cost and lack of market competitiveness, so it is difficult to promote and use in large quantities; in addition, after the main body of the cutting nozzle is installed, it cooperates with the cone surface of the cutting nozzle mounting seat to form an air chamber. For the sealing of the air chamber, the tapered surface of the cutting nozzle body needs to be tightly squeezed into the tapered surface of the cutting nozzle mounting seat during installation. Since the material of the cutting torch is generally copper, the tapered surface of the cutting nozzle mounting seat It will be forced to deform, and after repeated disassembly and replacement, the conical surface of the cutting nozzle mounting seat will deform a lot, and it will no longer be able to carry out interference fit with the conical surface of the cutting nozzle body to achieve a good sealing effect, resulting in gas leakage. Safety and security are difficult to guarantee

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