WO2008141494A1

WO2008141494A1 - Method and device for flame cutting and welding using liquid pentane as fuel

Info

Publication number: WO2008141494A1
Application number: PCT/CN2007/002819
Authority: WO
Inventors: Shisu Wu
Original assignee: Shisu Wu
Priority date: 2007-05-18
Filing date: 2007-09-26
Publication date: 2008-11-27
Also published as: CN101049649A; CN101049649B

Abstract

A method and a device for flame cutting and welding using liquid pentane as fuel are provided. The method uses pentane as fuel such that a negative pressure is produced at opening of fuel connecting tube when a jet-suction cutting torch is operating, a negative pressure is also produced in an evaporator to evaporate the liquid pentane into gas in the evaporator, then the gaseous pentane is mixed with oxygen at an appropriate rate in the cutting torch to produce a combustible gas for flame cutting and welding. The device includes a jet-suction cutting and welding torch, an evaporator and an oxygen tank, wherein an oxygen joint of the jet-suction cutting and welding torch is connected to a pressure adjusting valve provided on the oxygen tank by a flexible tube, a fuel gas joint of the jet-suction cutting and welding torch is connected with the evaporator by a flexible tube, a fuel gas valve is attached to the fuel gas joint, and a fuel gas valve is also provided on the evaporator. With the method and device described above, as compared to a gasoline cutting torch, ignition performance is better, stability is improved, the temperature of cutting and welding flame is up to 2600?-2800?, and operation is more easy.

Description

Method and device for flame cutting welding with pentamidine liquid as fuel

The present invention relates to a method and apparatus for applying flame cutting welding using a pentane liquid as a fuel. Background technique:

The fuel commonly used in existing flame cutting machines is a gas fuel such as acetylene, propylene, propylene or natural gas. The gasoline cutting and welding machine developed in recent years uses gasoline liquid as fuel, which is characterized by energy saving, environmental protection and non-tempering. Gasoline cutting welders are designed by spraying gasoline into small droplets for combustion. During the working process, it is often difficult to ignite, the flame is unstable, and the quality of cutting or splicing is affected. Therefore, it cannot be Generally accepted by users. The applicant's practical patent "hand-held injection type atmospheric pressure gasoline cutting torch" (ZL2004200949348) and invention patent "shot suction type atmospheric pressure gasoline cutting torch" (2005100830855) have been reformed and improved, but Due to the complexity of the components of gasoline and the high amount of additives, the quality of purchased gasoline is very unstable, and the effect is still not satisfactory during use. Summary of the invention:

SUMMARY OF THE INVENTION The object of the present invention is to provide a method and apparatus for flame-cutting a pentane liquid as a fuel using a simple composition of a ruthenium-based liquid fuel, which is abundant in source, inexpensive, and easily convertible into a gas.

To achieve the above object, the technical solution provided by the present invention is:

A method for flame cutting welding using a pentane liquid as a fuel, using a liquid heptaquinone as a fuel, and using a negative pressure generated at a fuel nozzle when working with a suction-type cutting torch, causing a negative also in the evaporator Pressurize, the heptaquinone liquid can be vaporized into a gas in the evaporator, and the pentamidine gas is mixed with the oxygen in the torch and torch in the cutting torch to form a combustible gas for flame cutting. A device for flame cutting with a pentane liquid as a fuel, comprising a suction nozzle, an evaporator, an oxygen cylinder, and an oxygen connection of a suction-type torch through a hose and an oxygen cylinder The pressure regulating valve is connected, and the gas joint of the suction-type cutting torch is connected with the evaporator through a hose, wherein the gas joint has a gas gas, the evaporator has a gas gas, and the evaporator is equipped with an explosion-proof wire and a sieve. a plate, the sieve plate is located at the bottom of the explosion-proof wire, and a check valve and a sound-absorbing distributor are arranged below the sieve plate, one end of the check valve is connected with the sound-absorbing distributor, and the other end is connected to the breathing valve outside the evaporator through the pipe .

A float valve is also mounted inside the evaporator, and the float valve is connected to the rehydration outside the evaporator through a pipe.

After adopting the above method and device, the ignition performance is better and the stability is higher than that of the gasoline cutting welder, and the flame temperature of the cut welding is as high as 2600 ° C to 2800 ° C, and it is easy to adjust into a carbonized flame, a neutral flame and Oxidizing flame. When the acetylene burns, the carbonized flame has a strong black smoke. The present invention does not have any black smoke, the ignition is easy, the flame is stable, no tempering occurs, the operation is simple, and when the cutting welding is stopped, there is no negative pressure in the evaporator. Function, can automatically stop working. The evaporator of the invention has the advantages of simple structure, easy manufacture and low cost, and is under negative pressure working condition, and the evaporator is filled with an appropriate amount of explosion-proof wire, and the safety is high. It is proved that after adopting the scheme of the invention, the acetylene is used. Gas energy saving is up to 50%, which is more than 25% energy saving with propane gas. Since the combustion temperature is about 400-500 degrees Celsius higher than that of propylene carbonate, the steel plate or member having a thickness of 300 mm or less can be smoothly cut. The steel plate cut at the burning temperature is easier to process than the cutting opening cut by acetylene, and the bottom of the cutting opening is not hanged. Slag, suitable for industrial needs. BRIEF DESCRIPTION OF THE DRAWINGS:

Figure 1 is a schematic view showing the structure of the apparatus of the present invention. detailed description:

The method and apparatus of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in FIG. 1, the embodiment includes a suction-type cutting torch 1, an evaporator 2, an oxygen cylinder 3, and an oxygen connection of the injection-type welding torch 1 through a hose and an oxygen cylinder 3 The valve 11 is connected, and the gas connection of the suction-type cutting torch 1 is connected to the evaporator 2 through a hose, wherein the gas connection has a gas valve 12, and the evaporator 2 also has a gas width of 4, and the evaporator is internally provided. Explosion-proof wire 7, sieve plate 8, The sieve plate 8 is located at the bottom of the explosion-proof wire 7, and the checker plate 8 is provided with a check valve 9 and a sound-damping distributor 10, one end of the check valve 9 is connected to the sound-damping distributor 10, and the other end is connected to the evaporator through the pipe. 2 The external breathing valve 5 is connected. A float valve 13 is also mounted inside the evaporator 2, and the float valve 13 is connected to a refill valve 6 outside the evaporator through a pipe.

The specific method of the present invention is: when the regulating valve 11 on the oxygen cylinder 3 is opened to adjust to the required pressure, the preheating valve 14 in the suction-type welding torch 1 is opened, and the shooting in the suction-type welding torch 1 is started. The suction device generates a negative pressure in the fuel passage, and then opens the gas valve 12 and the evaporator gas valve 4 on the gas joint, and the negative pressure directly causes the evaporator 2 to generate a negative pressure through the connecting pipe, opening the breathing valve 5, and the air An upward flow of air is formed by the breathing valve 5, the check valve 9 and the noise attenuating distributor 10, and is evenly distributed through the sieve plate 8 to vigorously mix with the liquid pentane in the explosion-proof state in the explosion-proof wire 7. The function of the check valve 9 in the evaporator 2 is to accidentally dump when the evaporator 2 is in operation, and the internal liquid is not leaked. Since the latent heat of vaporization of pentamidine is low and the boiling point is also low, the intense mixing with air at normal temperature can quickly absorb the heat of the environment outside the evaporator 2 made of metal to evaporate into a mixture of higher concentration of pentane gas and air. Under the action of negative pressure, it is continuously pumped into the suction device by the injection-type welding torch 1 and mixed with oxygen to form a gas injection to the nozzle for burning and cutting. The filling of the pentane liquid can be sucked into the evaporator 2 by the fuel storage tank by opening the liquid filling valve 6, and automatically closed by the float valve 13 when the liquid level reaches a certain level. If the above-mentioned injection-type cutting torch 1 adopts a No. 100 torch, the oxygen pressure of the torch is 0.6Mpa, the negative pressure of the gas interface is about 0.04~0.05Mpa, and the evaporation of pentane liquid is 0.26~0.3L/h. The flame can be easily adjusted to a neutral flame, the flame temperature is 2600 ° C ~ 2800 ° C, can smoothly cut 100 mm thick steel plate; if the injection type welding torch 1 uses the No. 8 injection type torch, required The oxygen pressure is 0.3Mpa, the gas interface negative pressure is 0.035~0.04Mpa, the pentane liquid evaporation is 0.1~0.12L/h, and the torch flame can be conveniently adjusted to oxidized flame, neutral flame, carbonized flame, flame The temperature is 260 (TC~2800 °C, which can be smoothly connected.

In summary, the advantages of the present invention are as follows: 1. The ignition performance is better than that of the gasoline cutting welder, and the stability is high. No special torch or torch is required, and the original B-type suction torch and torch can be used to save the equipment re-investment and facilitate the purchase of wearing parts. 2. High safety, even When the torch or torch is working, the gas pipe is broken or accidentally damaged, and there is no danger of gas leakage. Since the inside of the evaporator is filled with the explosion-proof wire according to the standard, no explosion will occur; 3. The energy-saving effect is remarkable. Production costs are greatly reduced; 4, Wuxu is a by-product of the stone sleeve industry, and is a Class B green environmentally friendly fuel. The burned exhaust gas is harmless to the human body and solves the outlet of the petroleum industry by-products, and protects the safety and health of users. 5, the efficiency of the cutting welding has been improved, the speed is slightly faster than the acetylene in the cutting process, easy to operate and master, easy to carry out the construction and so on.

The invention can be applied to the cutting of steel and the splicing of metal, and can be widely applied to glass fusion to replace the commonly used propylene gas and natural gas, and has remarkable safety and energy saving effects.

Claims

Claim

1. A method for flame cutting welding using a liquid of amylose as a fuel, characterized in that: the liquid helium is used as a fuel, and the negative pressure generated at the fuel inlet of the injection-type cutting torch is used to promote the evaporator. Negative pressure is also generated in the middle, so that the liquid of the pentamidine can be vaporized into a gas in the evaporator, and the heptaproxine gas is mixed with the oxygen in the torch in the cutting torch to form a combustible gas for flame cutting.

2. A device for flame cutting with a amylose liquid as a fuel, comprising a suction-type cutting torch (1), an evaporator (2), and an oxygen cylinder (3), characterized in that: a suction-type cutting torch The oxygen fitting of (1) is connected to the pressure regulating valve (11) installed on the oxygen cylinder (3) through a hose, and the gas fitting of the suction-type cutting torch (1) is connected to the evaporator (2) through a hose. The gas connector has a gas valve (12), and the evaporator (2) also has a gas valve (4). The evaporator is equipped with an explosion-proof wire (7) and a sieve plate (8), and the sieve plate (8) is located therein. At the bottom of the explosion-proof wire (7), a check valve (9) and a sound-absorbing distributor (10) are arranged below the sieve plate (8), and one end of the check valve (9) is connected to the sound-absorbing distributor (10). The other end is connected via a pipe to a breathing valve (5) located outside the evaporator (2).

3. The apparatus for flame cutting welding using a pentane liquid as a fuel according to claim 2, wherein: a float ball (13) is further disposed inside the evaporator (2), and the float ball valve (13) ) Connect the pipette (6) to the outside of the evaporator via a pipe.