Gas cutting device adopting vaporized light hydrocarbon fuel

Abstract

The utility model provides a gas cutting device adopting vaporized light dydrocarbon fuel, which comprises a vaporizing tank, a gas cutting gun and an oxygen tank, the vaporizing tank is a reaction container for vaporizing liquid light dydrocarbon, the vaporizing tank is provided with a liquid adding port, an air inlet and a fuel gas outlet, the air inlet extends into the vaporizing tank through a gas inlet pipe, and the fuel gas outlet extends into the gas cutting gun through a gas outlet pipe. The tail end of the air inlet pipe is connected with a mixer for mixing air and light hydrocarbon; the gas cutting gun is an injection type gas cutting gun, the injection type gas cutting gun comprises a fuel gas inlet and an oxygen inlet, the fuel gas inlet is connected with the fuel gas outlet of the vaporization tank through a pipeline, and the oxygen inlet is connected with the oxygen tank through a pipeline. During working, the gas cutting gun is opened, oxygen flowing at a high speed forms negative pressure, and a mixture of gaseous light hydrocarbon and air at the upper part in the vaporization tank is sucked into the gas cutting gun to be mixed with the oxygen, so that combustion and gas cutting work are carried out. According to the utility model, liquid light hydrocarbon is vaporized to continuously provide gaseous light hydrocarbon fuel for gas cutting operation, so that the cost of the gas cutting fuel is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of welding and cutting operations, and more specifically, to a gas cutting device using vaporized light hydrocarbon fuel. Background Art

[0002] For example, in patent CN220489149U, during gas cutting, the gas fuel is generally mixed with oxygen and then ejected from the welding gun head and burned. The working steel surface is first heated with a preheating flame. After reaching the standard temperature, the cutting oxygen flow is increased to melt the steel and blow away the slag, thereby achieving the purpose of cutting. Commonly used gas fuels include acetylene, propane and natural gas. However, the above gas fuels are relatively expensive, and the use of cheaper liquid fuels can greatly reduce costs.

[0003] Light hydrocarbons are combustible substances composed of carbon and hydrogen, and the number of carbon atoms in their molecules is less than 16. Light hydrocarbons with carbon atoms between 1-4 in their molecules are methane, ethane, propane, and butane, which are gaseous at room temperature and pressure. Hydrocarbons with carbon atoms between 5-16 in their molecules are liquid at room temperature and pressure, and the price of liquid light hydrocarbons is much lower than that of gaseous light hydrocarbons. However, liquid light hydrocarbons cannot be used directly as gas cutting fuel and need to be vaporized before use. Among them, pentane (C5) is relatively easy to vaporize due to its lighter molecules. Therefore, using liquid light hydrocarbons to vaporize to produce gas fuel for gas cutting operations has become an urgent problem to be solved. Utility Model Content

[0004] The utility model provides a gas cutting device using vaporized light hydrocarbon fuel to overcome the defect of high gas cutting fuel cost in the prior art welding and cutting operation technology, thereby reducing the cost of gas cutting fuel.

[0005] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0006] A gas cutting device using vaporized light hydrocarbon fuel comprises a vaporizer, a gas cutting gun and an oxygen tank. The vaporizer is a reaction container for vaporizing liquid light hydrocarbons. The vaporizer is provided with a liquid filling port, an air inlet and a gas outlet. The liquid filling port is used to add liquid light hydrocarbons into the vaporizer. The air inlet extends into the vaporizer through an inlet pipe. A mixer for mixing air and light hydrocarbons is connected to the end of the inlet pipe. The gas cutting gun is an injection-suction gas cutting gun. The injection-suction gas cutting gun comprises a gas inlet and an oxygen inlet. The gas inlet is connected to the gas outlet of the vaporizer through a pipeline, and the oxygen inlet is connected to the oxygen tank through a pipeline.

[0007] Furthermore, a heat exchange cover plate is provided at the bottom of the vaporizer.

[0008] Furthermore, the heat exchange cover plate is an aluminum metal cover plate.

[0009] Furthermore, a plurality of groups of heat exchange fins are distributed on the surface of the heat exchange cover plate.

[0010] Furthermore, the gas cutting device using vaporized light hydrocarbon fuel also includes a bracket and a fan, the bracket is used to support the vaporization tank so that the heat exchange cover plate and the heat exchange fins thereon are suspended in the air, and the blowing direction of the fan is toward the heat exchange fins.

[0011] Furthermore, an air intake one-way valve is provided on the intake pipe.

[0012] Furthermore, a tank gas pressure balance valve is provided on the intake pipe at the rear end of the air intake one-way valve. The tank gas pressure balance valve is arranged in the vaporizer tank and located above the liquid level. The tank gas pressure balance valve is used to balance the air intake pressure and the pressure in the vaporizer tank.

[0013] Furthermore, the mixer is a jet mixer, which includes a jet air inlet, a jet air outlet and a jet liquid inlet. The jet air outlet is arranged upward, and from the jet air inlet to the jet air outlet, it includes an air inlet section, a suction chamber, a tapered section and a diffusion section in sequence. The rear end of the air inlet section is connected to a nozzle, the nozzle is located in the suction chamber and faces the tapered section, and the jet liquid inlet is connected to the suction chamber.

[0014] Furthermore, the liquid adding port is connected to a liquid adding tube, and the liquid adding tube extends into the bottom of the vaporizer.

[0015] Furthermore, a pressure balancing hole is provided on the liquid adding pipe, and the pressure balancing hole is arranged in the vaporizing tank and is located above the liquid surface.

[0016] Compared with the prior art, the beneficial effects of the technical solution of the utility model are as follows: the utility model provides a gas cutting device using vaporized light hydrocarbon fuel, including a vaporizer, a gas cutting gun and an oxygen tank, the vaporizer is a reaction container for vaporizing liquid light hydrocarbons, the vaporizer is provided with a liquid filling port, an air inlet and a gas outlet, the air inlet extends into the vaporizer through an inlet pipe, and the end of the inlet pipe is connected to a mixer for mixing air with light hydrocarbons; the gas cutting gun is an injection-suction gas cutting gun, the injection-suction gas cutting gun includes a gas inlet and an oxygen inlet, the gas inlet is connected to the gas outlet of the vaporizer through a pipeline, and the oxygen inlet is connected to the oxygen tank through a pipeline. When working, the gas cutting gun is turned on, and the high-speed flowing oxygen forms a negative pressure, and the mixture of gaseous light hydrocarbons and air in the upper part of the vaporizer is sucked into the gas cutting gun and mixed with oxygen, thereby burning and performing gas cutting. During this process, negative pressure is also formed in the upper part of the vaporizer, and air is sucked in from the air inlet. The air flow is broken up into bubbles in the mixer, and the bubbles are fully contacted and mixed with the liquid light hydrocarbons, so that the liquid light hydrocarbons are vaporized to form gaseous light hydrocarbons, thereby continuously providing gaseous light hydrocarbon fuel for the gas cutting gun. The utility model can continuously provide gaseous light hydrocarbon fuel for the gas cutting operation by vaporizing the liquid light hydrocarbons, thereby reducing the cost of the gas cutting fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the vaporizer of Example 1-3.

[0018] Figure 2 Schematic diagram of the gas cutting gun of Example 1-3.

[0019] Figure 3 Schematic cross-sectional view of the jet mixer of Example 3.

[0020] Among them: 1. Vaporizer; 101. Liquid filling port; 102. Air inlet; 103. Gas outlet; 104. Inlet pipe; 105. Mixer; 1051. Inlet section; 1052. Suction chamber; 1053. Gradually convergent section; 1054. Diffusion section; 1055. Nozzle; 1056. Liquid suction pipe; 106. Heat exchange cover; 107. Air inlet check valve; 108. Gas pressure balance valve in the tank; 109. Liquid filling pipe; 2. Gas cutting gun; 201. Gas inlet; 202. Oxygen inlet. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. "First", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] Example 1

[0024] The present embodiment provides a gas cutting device using vaporized light hydrocarbon fuel, comprising a vaporizer 1, a gas cutting gun 2 and an oxygen tank. The vaporizer 1 is a reaction container for vaporizing liquid light hydrocarbons. The vaporizer 1 is provided with a liquid filling port 2, an air inlet 103 and a gas outlet. The liquid filling port 2 is used to add liquid light hydrocarbons into the vaporizer 1. The air inlet 103 extends into the vaporizer 1 through an inlet pipe 104. A mixer 105 for mixing air with light hydrocarbons is connected to the end of the inlet pipe 104. The gas cutting gun 2 is an injection-suction gas cutting gun, which comprises a gas inlet 201 and an oxygen inlet 202. The gas inlet 201 is connected to the gas outlet of the vaporizer 1 through a pipeline, and the oxygen inlet 202 is connected to the oxygen tank through a pipeline.

[0025] When the gas cutting device using vaporized light hydrocarbon fuel of this embodiment is working, the gas cutting gun 2 is turned on, and the high-speed flowing oxygen forms a negative pressure, and the mixture of gaseous light hydrocarbon and air in the upper part of the vaporizer 1 is sucked into the gas cutting gun 2 to mix with oxygen, thereby burning and performing gas cutting. In this process, negative pressure is also formed in the upper part of the vaporizer 1, and air is sucked in from the air inlet 103. The air flow is broken into bubbles in the mixer 105, and the bubbles are fully contacted and mixed with the liquid light hydrocarbon, so that the liquid light hydrocarbon is vaporized to form gaseous light hydrocarbon, thereby continuously providing gaseous light hydrocarbon fuel for the gas cutting gun 2. The utility model can continuously provide gaseous light hydrocarbon fuel for gas cutting operations by vaporizing liquid light hydrocarbons, thereby reducing the cost of gas cutting fuel.

[0026] Example 2

[0027] Since liquid light hydrocarbons need to absorb heat during the vaporization process, the gas cutting device using vaporized light hydrocarbon fuel in Example 1 can work continuously when the outdoor temperature is high. However, when the outdoor temperature is low, insufficient flow of gaseous light hydrocarbons may occur due to the failure to absorb heat in time. To solve this problem, this embodiment is improved on the basis of Example 1 to improve the availability of the device when the outdoor temperature is low.

[0028] In the specific implementation process, a heat exchange cover plate 106 is provided at the bottom of the vaporizer 1. Since the liquid light hydrocarbon needs to absorb heat during the vaporization process, the heat exchange cover plate 106 is provided to facilitate the heat exchange between the liquid light hydrocarbon in the vaporizer 1 and the hot air outside the vaporizer 1, absorb the heat in the air, and improve the vaporization efficiency, thereby meeting the required flow rate.

[0029] In the specific implementation process, the heat exchange cover plate 106 is an aluminum metal cover plate. Aluminum metal has good thermal conductivity and is low in price, so it is very suitable for general heat conduction scenarios.

[0030] In the specific implementation process, a plurality of groups of heat exchange fins (not shown in the figure) are distributed on the surface of the heat exchange cover plate 106. The function of the heat exchange fins is to increase the contact area with the air, so as to better exchange heat with the air.

[0031] In the specific implementation process, the gas cutting device using vaporized light hydrocarbon fuel also includes a bracket (not shown in the figure) and a fan (not shown in the figure). The bracket is used to support the vaporizer 1, so that the heat exchange cover plate 106 and the heat exchange fins thereon are suspended in the air, and the blowing direction of the fan is toward the heat exchange fins. In actual application, guide grooves suitable for air flow are designed between the heat exchange fins. The fan drives the air to flow through the guide grooves, which is conducive to increasing the amount of air involved in heat exchange and improving the heat exchange effect.

[0032] Example 3

[0033] Based on Example 2, this example further improves the usability of the gas cutting device using vaporized light hydrocarbon fuel.

[0034] In the specific implementation process, an air intake check valve 107 is provided on the air intake pipe 104. The function of the air intake check valve 107 is to prevent the light hydrocarbons from flowing back along the air intake pipe 104 when the pressure in the vaporizer 1 is too high.

[0035] During the specific implementation process, a tank gas pressure balance valve 108 is also provided on the intake pipe 104 at the rear end of the air intake one-way valve 107. The tank gas pressure balance valve 108 is arranged in the vaporizer 1 and is located above the liquid level. The tank gas pressure balance valve 108 is used to balance the air intake pressure and the pressure inside the vaporizer 1.

[0036] It should be noted that if the air intake pressure is lower than the pressure in the vaporizer 1, the liquid light hydrocarbons in the tank will flow back, thereby corroding the air intake check valve 107. In severe cases, the liquid light hydrocarbons will flow back and spray out from the air intake port 103, which may easily cause safety accidents. This embodiment is provided with a gas pressure balance valve 108 in the tank, and its specific structure can refer to the balance valve in the Chinese utility model patent CN218207969U. There is a check valve in the gas pressure balance valve 108 in the tank. When the air intake pressure is greater than the pressure in the vaporizer 1, the air flows normally along the pipeline; when the air intake pressure is lower than the pressure in the vaporizer 1, the gas in the vaporizer 1 will flow back. At this time, the check valve is automatically opened by the pressure difference, connecting the vaporizer 1 with the pipeline, so that the vaporizer 1 and the intake pipe 104 reach pressure balance, preventing the liquid light hydrocarbons from flowing back along the intake pipe 104.

[0037] In the specific implementation process, the mixer 105 is a jet mixer, which includes a jet air inlet, a jet air outlet and a jet liquid inlet. The jet air outlet is arranged upward, and includes an air inlet section 1051, a suction chamber 1052, a tapered section 1053 and a diffuser section 1054 from the jet air inlet to the jet air outlet. The rear end of the air inlet section 2051 is connected to a nozzle 1055, which is located in the suction chamber 1052 and faces the tapered section 1053. The jet liquid inlet is connected to the suction chamber 1052; the jet liquid inlet extends into the bottom of the vaporizer 1 through a liquid suction pipe 1056. The air flow enters the jet mixer from the jet air inlet, and is ejected from the nozzle 1055 after passing through the air inlet section 1051. The flow rate is further accelerated, and the negative pressure generated by the high-speed air flow sucks the liquid light hydrocarbons into the jet mixer from the jet liquid inlet. In this process, the liquid light hydrocarbons are fully mixed with the air, which promotes the evaporation and vaporization of the light hydrocarbon liquid. The jet outlet of the jet mixer discharges a mixture of air, gaseous light hydrocarbons and a small amount of liquid light hydrocarbons. The air and gaseous light hydrocarbons float in the liquid light hydrocarbons in the form of bubbles. In this process, the bubbles further contact with the liquid light hydrocarbons to increase the vaporization amount. The mixer 105 can also use an aeration stone, which is a solid material with a porous structure inside.

[0038] In the specific implementation process, the liquid filling port 101 is connected to a liquid filling pipe 109, and the liquid filling pipe 109 extends into the bottom of the vaporizer 1. Liquid light hydrocarbon is an insulator and also a flammable liquid that easily generates static electricity. When filling light hydrocarbon liquid, it is very dangerous if no anti-static measures are taken. There is a certain pressure when filling liquid light hydrocarbon. If the liquid filling pipe 109 is too high from the bottom of the tank when filling into the tank body. The impact of liquid light hydrocarbon into the tank will accelerate the friction and collision between light hydrocarbon and light hydrocarbon, light hydrocarbon and tank wall, and generate static electricity. Therefore, inserting the liquid filling pipe 109 into the bottom of the tank is a safety measure to prevent static electricity.

[0039] In the specific implementation process, a pressure balance hole is opened on the liquid adding pipe 109, and the pressure balance hole is set in the vaporizing tank and is located above the liquid surface. When there is a certain pressure in the tank, the light hydrocarbon liquid will flow back along the liquid adding pipe 109, and the light hydrocarbon liquid will be sprayed out from the liquid adding port 2. Therefore, a pressure balance hole is opened on the liquid adding pipe 109, so that the pressure in the liquid adding pipe 109 is balanced with the pressure in the tank, and the liquid light hydrocarbon will not flow back out.

[0040] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A gas cutting device using vaporized light hydrocarbon fuel, characterized in that: The invention comprises a vaporizer (1), a gas cutting gun (2) and an oxygen tank. The vaporizer (1) is a reaction vessel for vaporizing liquid light hydrocarbons. The vaporizer (1) is provided with a liquid adding port (101), an air inlet (102) and a gas outlet (103). The liquid adding port (101) is used to add liquid light hydrocarbons into the vaporizer (1). The air inlet (102) extends into the vaporizer (1) through an inlet pipe (104). The end of the inlet pipe (104) is connected to a mixer (105) for mixing air and light hydrocarbons. The gas cutting gun (2) is an injection-suction gas cutting gun. The injection-suction gas cutting gun comprises a gas inlet (201) and an oxygen inlet (202). The gas inlet (201) is connected to the gas outlet (103) of the vaporizer (1) through a pipeline. The oxygen inlet (202) is connected to the oxygen tank through a pipeline.

2. The gas cutting device using vaporized light hydrocarbon fuel according to claim 1, characterized in that: A heat exchange cover plate (106) is provided at the bottom of the vaporizer (1).

3. The gas cutting device using vaporized light hydrocarbon fuel according to claim 2, characterized in that: The heat exchange cover plate (106) is an aluminum metal cover plate.

4. The gas cutting device using vaporized light hydrocarbon fuel according to claim 2, characterized in that: A plurality of groups of heat exchange fins are distributed on the surface of the heat exchange cover plate (106).

5. The gas cutting device using vaporized light hydrocarbon fuel according to claim 4, characterized in that: The gas cutting device using vaporized light hydrocarbon fuel also includes a bracket and a fan, wherein the bracket is used to support the vaporizer (1) so that the heat exchange cover plate (106) and the heat exchange fins thereon are suspended in the air, and the blowing direction of the fan is toward the heat exchange fins.

6. The gas cutting device using vaporized light hydrocarbon fuel according to claim 1, characterized in that: The air intake pipe (104) is provided with an air intake check valve (107).

7. The gas cutting device using vaporized light hydrocarbon fuel according to claim 6, characterized in that: A tank gas pressure balancing valve (108) is also provided on the intake pipe (104) at the rear end of the air intake one-way valve (107). The tank gas pressure balancing valve (108) is arranged in the vaporizer (1) and is located above the liquid surface. The tank gas pressure balancing valve (108) is used to balance the air intake pressure and the pressure in the vaporizer (1).

8. The gas cutting device using vaporized light hydrocarbon fuel according to claim 7, characterized in that: The mixer (105) is a jet mixer, comprising a jet air inlet, a jet air outlet and a jet liquid inlet, wherein the jet air outlet is arranged upward, and the jet air inlet and the jet air outlet sequentially comprise an air inlet section (1051), a suction chamber (1052), a tapered section (1053) and a diffuser section (1054), wherein the rear end of the air inlet section (1051) is connected to a nozzle (1055), wherein the nozzle (1055) is located in the suction chamber (1052) and faces the tapered section (1053), and the jet liquid inlet is connected to the suction chamber (1052).

9. The gas cutting device using vaporized light hydrocarbon fuel according to claim 1, characterized in that: The liquid adding port (101) is connected to a liquid adding pipe (109), and the liquid adding pipe (109) extends into the bottom of the vaporizing tank (1).

10. The gas cutting device using vaporized light hydrocarbon fuel according to claim 9, characterized in that: The liquid adding pipe (109) is provided with a pressure balancing hole, which is arranged in the vaporizing tank (1) and is located above the liquid surface.

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