KR19980059652U - Plasma torch - Google Patents

Abstract

This design provides a torch that improves the cutting cuff angle by uniformly improving the gas pressure distribution supplied to the arc tunnel by installing a dual gas distribution device in the gas stabilizer installed between the gas supply channel and the tubular gas supply port. I would like to provide. This design supplies the gas supplied from the gas passage 71 to the tubular supply port 72 of the domed arc tunnel 21 via the ceramic gas stabilizer 3, but is closed by the O-ring 30. An annular primary distribution space 31 and a secondary distribution space 34 are formed within the annular space, and the primary distribution space 31 is connected to the secondary distribution space 34 through the primary spiral distribution passage 33. And the secondary distribution space 34 is connected to the annular supply port 72 through the subdivision secondary spiral distribution passage 35 to supply gas to the annular supply port 72 at a uniform pressure. It's a mischief. According to this design, the conventional allowable cuff angle of 5 ° is improved to 3 °.

Description

Plasma torch

This design provides a torch that improves the cutting cuff angle by uniformly improving the gas pressure distribution supplied to the arc tunnel by installing a dual gas distribution device in the gas stabilizer installed between the gas supply channel and the tubular gas supply port. I would like to provide.

Plasma torch for cutting is a high-speed pilot arc containing a tens of thousands of ℃ plasma by supplying nitrogen gas (hydrogen + nitrogen), argon gas (argon + hydrogen), oxygen or dehumidified air into the arc salt. As an apparatus for obtaining (340 m / sec), air cooling and torch cooling are classified according to cooling methods.

Water-cooled plasma torches, for example, provide dissociation gas to the arc current-carrying tip and electrode gaps and circulate cooling water inside and outside the electrode to protect the tip and electrode from arc heat. Avoids the cooling system distributed inside the torch center electrode and the outside of the torch tip tip, and through the gas stabilizer and tubular gas supply on one side of the torch, the gas in the dome arc tunnel between the torch center tip and the electrode And discharge the plasma arc through the tunnel nozzle, the gas supply pressure flowing into the dome-shaped tunnel through the tubular gas supply is not uniform, so that the plasma distribution in the arc salt is malformed. Therefore, the conventional plasma torch had to use a gas distribution accessory inside the torch to overcome this.

This invention is designed to improve the above problems, by installing a double gas distribution device in the gas stabilizer installed between the gas supply passage and the tubular gas supply port to uniformly improve the gas pressure distribution supplied to the arc tunnel In providing a torch that improves the cutting cuff angle.

1 is a complete assembly cross-sectional view of the subject innovation

2 is an enlarged perspective view of a bisecting section of a gas ballast;

3A, B, and C are enlarged cross-sectional views taken along lines A-A, B-B, and C-C of FIG. 2, respectively.

* Description of the major symbols in the drawings *

71: gas passage 3: gas stabilizer 21: arc tunnel 72: tubular supply port 30: O-ring 31: primary distribution space 33: primary spiral dispersion passage 34: secondary distribution space 35: secondary spiral dispersion passage

Figure 1 shows the configuration of a water-cooled plasma torch including this design.

Specifically, the torch forms an arc tunnel 21 between the tip 1 and the electrode 2, and the cooling water w supplied from the main water pipe 41 is a tubular cooling tube 40 and an electrode 2. And the passages 42 and 43 formed by the electrode body 4 to cool the inside of the electrode 2 in which the heat collecting metal 22 is installed, and the composition is formed on the electric heating body 5 and the tip body 6. After passing through the passage (51, 52) to cool the tip (1) is recovered to the coolant pump through the drain pipe (53); Gas is supplied to the dome arc tunnel 21 through the gas pipe 7, the gas passage 71, the gas stabilizer 3, and the tubular gas supply port 72 to blow off the plasma arc to the nozzle 11. To; In order to supply the arc current to the tip 1 and the electrode 2, the tip body 6 and the electrode body 4 supported on both ends of the insulator 5 are used as electrical conductors, and the main water pipe 41 and the gas pipe (7) and the insulated Teflon tube 55 are covered with the drain pipe 53, and the insulated Teflon coating is applied to the outer periphery of the electrode body stand 4; In order to strictly block the cooling flow path and the gas flow path and prevent cooling water leakage, a heat resistant O-ring 54 is installed in the composition of the flow paths.

This design allows the gas supplied from the gas passage 71 to the tubular supply port 72 of the domed arc tunnel 21 through the ceramic gas ballast 3 as shown in FIGS. 1 and 2 and 3. A circular primary distribution space 31 and a secondary distribution space 34 are formed in the ballast 3 closed by the O-ring 30, and the primary distribution space 31 is provided as a primary spiral dispersion passage. The return gas is connected to the secondary distribution space 34 through the 33, and the secondary distribution space 34 is connected to the annular supply port 72 through the subdivision secondary spiral distribution passage 35. To supply a uniform pressure. In the embodiment, the primary spiral dispersion passage 35 is four passages obtained by dividing the gas flow volume of the passage 71 at equal intervals, and the secondary secondary spiral dispersion passage 35 equally spaces the gas flow volume of the passage 71. It was composed of eight passages divided by, and the spiral angle was 15 °.

Thus, this design is a gas distribution from the one-side passage 71 inside the torch, but the dual gas distribution device, that is, the gas is distributed in the annular primary distribution space 31, the primary spiral in the ballast (3) closed by the O-ring (30) While passing through the passage 33, the secondary distribution space 34 and the secondary spiral dispersion passage 35, the circulating gas is supplied to the annular gas supply port 72 at a uniformly distributed pressure, so that The plasma distribution is adjusted to have a linearity, thereby improving cutting quality (improving cutting angle) and cutting efficiency of the metal material M. FIG.

The kerf effect by this design is improved as shown in Table 1.

Table 1

Allowable Cuff Angle of Conventional Plasma Torch Cuff angle obtained from this devised torch 5 3

As described above, this design eliminates the arc deflection between the electrode and the tip and improves the plasma linearity in the arc salt by uniformly dispersing and flowing the gas pressure in the gas ballast without using the gas distribution accessory. It is to improve the cutting efficiency and the kerf improvement effect of the cutting material.

Claims (1)

The gas supplied from the gas passage 71 is supplied to the tubular supply port 72 of the domed arc tunnel 21 through the ceramic gas ballast 3, but is annular in the ballast 3 closed by the O-ring 30. The primary distribution space portion 31 and the secondary distribution space portion 34 are formed, and the primary distribution space portion 31 is formed through the tubular passage 32 and the primary spiral dispersion passage 33. ), And the secondary distribution space portion 34 is connected to the annular supply port 72 through the subdivision secondary spiral distribution passage 35 to supply gas to the annular supply port 72 at a uniform pressure. Plasma torch.