Ignition gun device using secondary gas ignition

Abstract

This invention relates to the field of steel billet flame cutting technology, specifically to an ignition gun device using a two-stage gas ignition method, comprising: a main ignition gun barrel with a main ignition gun flame nozzle at its top, and a second pipe extending outward from near the main ignition gun flame nozzle; an air ejector device including an airflow regulating device, an air ejector, and a main ignition gun gas nozzle, with the lower end of the air ejector positioned above the main ignition gun flame nozzle, the airflow regulating device positioned above the air ejector, and the main ignition gun gas nozzle passing through the airflow regulating device; and a primary ignition device including a primary ignition gun barrel, a primary gas nozzle, and a high-frequency ignition electrode, with a perforation on the side wall of the primary ignition gun barrel, the lower end connected to the second pipe, and the upper end equipped with a primary ignition gun air cap, the primary gas nozzle and the high-frequency ignition electrode passing through the primary ignition gun air cap, thereby solving the problems of narrow gas ignition pressure range and short lifespan of high-frequency ignition electrodes in existing ignition guns.

Description

Technical Field

[0001] This invention relates to the field of steel billet flame cutting technology, specifically to an ignition gun device using a two-stage gas ignition method. Background Technology

[0002] Existing ignition guns suffer from a very small distance between the flame cutting torch and the high-temperature steel billet. The air density near the billet and torch is low, requiring the high-frequency ignition electrode to be relatively far from the torch. The gas flame ignited by the high-frequency ignition electrode needs high pressure to successfully ignite the torch. However, excessively high gas pressure leads to excessively fast gas flow, resulting in uneven mixing of gas and air, and consequently, ignition failure of the high-frequency ignition electrode. Furthermore, in existing ignition guns, after the high-pressure gas is ignited, the high-frequency ignition electrode is continuously exposed to the flame, leading to a high failure rate and short lifespan. Therefore, existing ignition guns suffer from a narrow gas ignition pressure range and a short high-frequency ignition electrode lifespan. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides an ignition gun device using a two-stage gas ignition method.

[0004] This invention is achieved through the following technical solution: It provides an ignition gun device using a two-stage gas ignition method, which is fixedly installed on a flame cutting machine and positioned on one side of a steel billet flame cutting gun. The device includes: a main ignition gun assembly, comprising a main ignition gun barrel, a main ignition gun flame nozzle at the top of the barrel, a second pipe extending outward from the barrel near the flame nozzle, and a flame guide device at the bottom; and an air ejector device, comprising an airflow regulating device, an air ejector, and a main ignition gun gas nozzle, with the lower end of the air ejector positioned on the main ignition gun flame nozzle. Above the flame nozzle, an airflow regulating device is located at the upper end of the air ejector. The main ignition gun gas nozzle passes through the airflow regulating device and extends into the air ejector. The main ignition gun gas nozzle is used to introduce high-pressure main gas. The primary ignition device includes a primary ignition gun barrel, a primary gas nozzle, and a high-frequency ignition electrode. The side wall of the primary ignition gun barrel has a hole. The lower end of the primary ignition gun barrel is connected to a second pipe. The upper end of the primary ignition gun barrel is provided with a primary ignition gun air cap. The primary gas nozzle and the high-frequency ignition electrode pass through the primary ignition gun air cap and extend into the primary ignition gun barrel. The primary gas nozzle is used to introduce low-pressure primary gas.

[0005] Furthermore, the air volume regulating device includes an air volume regulating plate and a main ignition gun air cap. The air volume regulating plate is sleeved on the upper part of the air ejector and fixedly installed along the circumference of the air ejector. The main ignition gun air cap is sleeved on the upper end of the air ejector and can rotate along the circumference of the air ejector. The main ignition gun air cap is set on the upper surface of the air volume regulating plate and is used to adjust the air intake volume of the air ejector in conjunction with the air volume regulating plate. The main ignition gun gas nozzle is set on the air volume regulating plate.

[0006] Furthermore, the primary ignition gun air cap is also provided with a groove, and a high-pressure dust cover is fitted on the upper part of the primary ignition gun air cap. A ball plunger is installed on the outer wall of the high-pressure dust cover near the primary ignition gun air cap. The ball plunger passes through the outer wall of the high-pressure dust cover and is inserted into the groove of the ignition air cap.

[0007] Furthermore, the flame guiding device has a ignition port on the side facing the billet flame cutting gun, and the position of the ignition port is lower than that of the billet flame cutting gun.

[0008] Furthermore, the primary ignition gun barrel is funnel-shaped, with a cylindrical sidewall extending from the top of the funnel, and the pores are evenly distributed on the cylindrical sidewall.

[0009] Compared with the prior art, the present invention has the following beneficial effects: The primary ignition device ensures a high ignition success rate by setting a high-frequency ignition electrode to ignite low-pressure gas and generate a low-pressure gas flame. The air ejector utilizes a high-pressure gas jet to fully mix high-pressure gas with air, and injects it into the main ignition gun barrel through the flame nozzle. The mixed gas and air flow draws the low-pressure gas flame from the primary ignition device into the main ignition gun barrel, thereby igniting the mixed gas and air flow and generating a high-pressure flame. This flame ignites the billet flame cutting torch through the main ignition gun barrel. Thus, this invention, through a two-stage gas ignition method, can efficiently provide a high-pressure flame for the billet flame cutting torch, effectively improving the ignition success rate of the torch and ensuring successful ignition of the billet flame cutting torch. After the main ignition gun ignites the billet flame cutting gun, the primary gas nozzle in the primary ignition device stops supplying low-pressure gas, and the low-pressure flame in the primary ignition device is extinguished. External air is continuously drawn into the primary ignition device and the main ignition gun barrel through the primary ignition gun air cap, cooling the high-frequency ignition electrode, thereby effectively improving the service life of components such as the high-frequency ignition electrode and making the electrode less prone to damage. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of an ignition gun device using a two-stage gas ignition method according to the present invention; Figure 2This is a cross-sectional schematic diagram of an ignition gun device using a two-stage gas ignition method according to the present invention; Figure 3 This is a partial schematic diagram of an ignition gun device using a two-stage gas ignition method according to the present invention; Figure 4 This is a schematic diagram of the airflow regulating plate structure of an ignition gun device using a two-stage gas ignition method according to the present invention. In the attached diagram: 1. Steel billet flame cutting torch; 2. Primary ignition device; 2.1. Primary ignition torch barrel; 2.2. Primary ignition torch air cap; 2.3. Primary gas nozzle; 2.4. High-frequency ignition electrode; 2.5. High-pressure dust cover; 2.6. Ball plunger; 2.7. Ignition torch primary gas pipeline solenoid valve; 2.8. High-pressure ignition coil; 3. Air ejector device; 3.1. Air ejector; 3.2. Air volume regulating plate; 3.3. Main ignition torch air cap; 3.4. Main ignition torch gas nozzle; 3.5. Ignition torch main gas pipeline solenoid valve; 4. Main ignition torch device; 4.1. Main ignition torch flame nozzle; 4.2. Main ignition torch barrel. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings.

[0012] Example 1

[0013] Please see Figures 1-4 The present invention provides an ignition gun device using a two-stage gas ignition method. The ignition gun device is installed on a flame cutting machine and is located on one side of a steel billet flame cutting gun 1. It includes a main ignition gun device 4, an air ejector device 3 and a primary ignition device 2. like Figure 1 , Figure 2 As shown, the main ignition gun device 4 includes a main ignition gun barrel 4.2, a main ignition gun flame nozzle 4.1 is provided at the top of the main ignition gun barrel 4.2, a second pipe extends outward from the main ignition gun barrel 4.2 near the main ignition gun flame nozzle 4.1, and a flame guide device is provided at the bottom of the main ignition gun device 4.

[0014] The air ejector device 3 includes an airflow regulating device, an air ejector 3.1, and a main ignition gun gas nozzle 3.4. The lower end of the air ejector 3.1 is positioned above the main ignition gun flame nozzle 4.1. The airflow regulating device is located at the upper end of the air ejector 3.1. The main ignition gun gas nozzle 3.4 is used to introduce high-pressure main gas. In this embodiment, one end of the main ignition gun gas nozzle 3.4 is connected to the solenoid valve 3.5 of the main ignition gun main gas pipeline, and the other end extends through the airflow regulating device into the air ejector 3.1. The main ignition gun gas is injected into the air ejector 3.1 through the main ignition gun gas nozzle 3.4. The main ignition gun gas jet interacts with the air ejector 3.1 to draw in air, allowing the high-pressure gas and air to mix thoroughly within the air ejector 3.1, forming a mixture of high-pressure gas and air.

[0015] The primary ignition device 2 includes a primary ignition gun barrel 2.1, a primary gas nozzle 2.3, and a high-frequency ignition electrode 2.4. The primary ignition gun barrel 2.1 has a perforation on its side wall, and the inner diameter of its bottom is adapted to the outer diameter of the second pipe. The lower end of the primary ignition gun barrel 2.1 is connected to the second pipe, and a primary ignition gun air cap 2.2 is provided at the upper end of the primary ignition gun barrel 2.1. The air cap 2.2 can rotate circumferentially along the primary ignition gun barrel 2.1 to adjust the air intake of the primary ignition device 2. The primary gas nozzle 2.3 is used to introduce low-pressure gas. In this embodiment, the primary gas nozzle 2.3 is connected to the primary gas pipeline solenoid valve 2.7 of the ignition gun at its top. The bottom of the primary gas nozzle 2.3 and the high-frequency ignition electrode 2.4 pass through the primary ignition gun air cap 2.2 and extend into the primary ignition gun barrel 2.1. The primary gas mixes with air in the primary ignition device 2 to produce a combustible gas-air mixture. The high-frequency ignition electrode 2.4 in the primary ignition device 2 is energized by the high-voltage ignition coil 2.8 to generate a high-frequency electric spark, which ignites the gas-air mixture in the primary ignition device 2, thereby producing a flame with low pressure.

[0016] In this embodiment, when the gas is introduced into the ignition gun device, it is divided into low-pressure primary gas and high-pressure main gas. The low-pressure primary gas enters the primary ignition device 2 through the primary gas nozzle 2.3. The primary gas mixes with air within the primary ignition device 2 to produce a combustible gas-air mixture. The high-frequency ignition electrode 2.4 within the primary ignition device 2 is energized to generate a high-frequency electric spark, igniting the gas-air mixture within the primary ignition device 2 and producing a low-pressure flame. This flame then enters the main ignition gun through the second pipe structure on the main ignition gun barrel 4.2. The high-pressure main gas… Gas enters the air ejector device 3 through the main ignition gun gas nozzle 3.4, and is drawn into the air ejector 3.1 by the gas jet to form a high-pressure gas-air mixture. This high-pressure gas-air mixture enters the main ignition gun barrel 4.2 through the main ignition gun flame nozzle 4.1, where it meets the lower-pressure flame generated by the primary ignition device 2 in the second pipe structure on the main ignition gun barrel 4.2. The high-pressure gas-air mixture is ignited by the lower-pressure flame, generating a higher-pressure flame, which ignites the billet flame cutting torch 1 through the main ignition gun barrel 4.2. Therefore, this invention, through a two-stage ignition method, can efficiently provide a high-pressure flame to the billet flame cutting torch 1, ensuring successful ignition of the billet flame cutting torch 1.

[0017] Specific examples Figure 3 and Figure 4 As shown, the airflow regulating device includes an airflow regulating plate 3.2 and a main ignition gun air cap 3.3. The airflow regulating plate 3.2 is sleeved on the upper part of the air ejector 3.1 and fixedly installed along the circumference of the air ejector 3.1. The main ignition gun air cap 3.3 is sleeved on the upper end of the air ejector 3.1 and can rotate along the circumference of the air ejector 3.1. The main ignition gun air cap 3.3 is sleeved on the upper surface of the airflow regulating plate 3.2, and the main ignition gun gas nozzle 3.4 is disposed on the airflow regulating plate 3.2. By rotating the main ignition gun air cap 3.3 in conjunction with the airflow regulating plate 3.2, the airflow of the air ejector 3.1 is adjusted. In this embodiment, by rotating the main ignition gun air cap 3.3, the overlapping area of ​​the holes of the main ignition gun air cap 3.3 and the airflow regulating plate 3.2 can be reduced, thereby increasing the airflow of the air ejector 3.1.

[0018] Specifically, the upper end of the primary ignition gun air cap 2.2 has a groove with a width of 2.5mm and a depth of 1.5mm. A high-pressure dust cover 2.5 is fitted onto the upper part of the primary ignition gun air cap 2.2. A ball-head plunger 2.6 is installed near the outer wall of the high-pressure dust cover 2.5. The ball-head plunger 2.6 is used to pass through the outer wall of the high-pressure dust cover 2.5 and engage with the groove with a width of 2.5mm and a depth of 1.5mm on the upper part of the primary ignition gun air cap 2.2 to fix the high-pressure dust cover 2.5. In this embodiment, the high-pressure dust cover 2.5 can prevent flying dust from entering and prevent the high-voltage wire ends from being exposed to the air and affecting the operation of the ignition gun.

[0019] Specifically, the flame guiding device has a ignition port on the side facing the billet flame cutting torch 1, and the position of the ignition port is lower than that of the billet flame cutting torch 1. In this embodiment, the ignition port is inclined on the side near the billet flame cutting torch 1, and the inclination angle is greater than 90°, which can more accurately deliver the flame to the port of the billet flame cutting torch 1.

[0020] Specifically, the primary ignition gun barrel 2.1 is funnel-shaped, with a cylindrical sidewall extending from the top of the funnel. The pores are evenly distributed on the cylindrical sidewall to facilitate the mixing of gas and air.

[0021] Working principle: When the gas in the billet flame cutting torch 1 needs to be ignited, the control circuit issues an ignition command. The primary gas pipeline solenoid valve 2.7 and the main gas pipeline solenoid valve 3.5 of the ignition torch open simultaneously. The primary gas is injected into the primary ignition torch barrel 2.1 through the primary gas nozzle 2.3 and mixes with the air in the primary ignition torch barrel 2.1 to form a low-pressure combustible mixture. After a 5-second delay, the control circuit issues a high-frequency ignition command. The high-frequency ignition electrode 2.4 generates a high-frequency electric spark, igniting the low-pressure gas in the primary ignition torch barrel 2.1 and producing a flame with a short flame length.

[0022] The main ignition gun gas is injected into the air ejector 3.1 through the main ignition gun gas nozzle 3.4. The main ignition gun gas jet interacts with the air ejector 3.1 to draw in air, and mixes with it to produce a high-pressure combustible mixture. The high-pressure combustible mixture is then injected into the main ignition gun barrel 4.2 through the main ignition gun flame nozzle 4.1. As the high-pressure combustible mixture flows through the second pipe from the main ignition gun barrel 4.2, it draws in the shorter flame generated by the primary ignition device 2 and ignites the high-pressure combustible mixture, producing a high-pressure, longer flame. This flame is then ejected through the flame guide device at the bottom of the main ignition gun barrel 4.2 and ignites the gas in the billet flame cutting gun 1.

[0023] After the gas in the billet flame cutting torch 1 is ignited, the control circuit sends a command to close the solenoid valve 2.7 of the primary gas pipeline of the ignition torch. The flame in the primary ignition device 2 is extinguished. Under the action of the flame flow in the main ignition torch barrel 4.2, the air outside the primary ignition device 2 enters through the hole on the primary ignition torch barrel 2.1. While cooling the high-frequency ignition electrode 2.4, the air entering the main ignition torch barrel 4.2 participates in combustion, improving the combustion efficiency of the main gas in the ignition torch.

[0024] After the billet flame cutting torch 1 is successfully ignited, a delay of 90 seconds occurs. Then, the control circuit sends a command to close the solenoid valve 3.5 of the main gas pipeline of the ignition torch, extinguishing the flame in the main ignition torch barrel 4.2, and waiting for the next ignition command.

[0025] Example 2

[0026] The only difference between this embodiment and Embodiment 1 is that the flame guiding device is a tubular component.

[0027] Example 3

[0028] The only difference between this embodiment and Embodiment 1 is that the top of the primary ignition gun barrel funnel does not extend to the cylindrical sidewall, and the holes in the primary ignition gun barrel on the cylindrical sidewall are evenly distributed on the sidewall of the funnel.

Claims

1. A torch device using a secondary gas ignition method, which is fixedly installed on a flame cutting machine and disposed at one side of a billet flame cutting torch (1), characterized in that, include: The main ignition gun device (4) includes a main ignition gun barrel (4.2), a main ignition gun flame nozzle (4.1) is provided at the top of the main ignition gun barrel (4.2), a second pipe extends outward from the main ignition gun barrel (4.2) near the main ignition gun flame nozzle (4.1), and a flame guide device is provided at the bottom of the main ignition gun device (4) facing the billet flame cutting gun (1); An air ejector device (3) is provided, comprising an airflow regulating device, an air ejector (3.1), and a main ignition gun gas nozzle (3.4). The lower end of the air ejector (3.1) is positioned above the main ignition gun flame nozzle (4.1), and the airflow regulating device is positioned at the upper end of the air ejector (3.1). The main ignition gun gas nozzle (3.4) extends through the airflow regulating device into the air ejector (3.1) and is used to introduce high-pressure main gas. A primary ignition device (2) is provided, comprising a primary ignition gun barrel (2.1), a primary gas nozzle (2.3), and a high-frequency ignition electrode (2.4). The primary ignition gun barrel (2.1) has a hole on its side wall. The lower end of the primary ignition gun barrel (2.1) is connected to a second pipe. The upper end of the primary ignition gun barrel (2.1) is provided with a primary ignition gun air cap (2.2). The primary gas nozzle (2.3) and the high-frequency ignition electrode (2.4) extend into the primary ignition gun barrel (2.1) through the primary ignition gun air cap (2.2). The primary gas nozzle (2.3) is used to introduce low-pressure primary gas. The primary ignition gun air cap (2.2) is also provided with a groove. A high-pressure dust cover (2.5) is fitted on the upper part of the primary ignition gun air cap (2.2). A ball plunger (2.6) is installed on the outer wall of the high-pressure dust cover (2.5) near the primary ignition gun air cap (2.2). The ball plunger (2.6) passes through the outer wall of the high-pressure dust cover (2.5) and is inserted into the groove of the ignition air cap.

2. The ignition gun device using a two-stage gas ignition method according to claim 1, characterized by: The air volume regulating device includes an air volume regulating plate (3.2) and a main ignition gun air cap (3.3). The air volume regulating plate (3.2) is sleeved on the upper part of the air ejector (3.1), the main ignition gun air cap (3.3) is sleeved on the upper end of the air ejector (3.1), the main ignition gun air cap (3.3) is set on the upper surface of the air volume regulating plate (3.2), and the main ignition gun gas nozzle (3.4) is set on the air volume regulating plate (3.2).

3. The ignition gun device using a two-stage gas ignition method according to claim 1, characterized in that: The flame guiding device has a ignition port on the side facing the billet flame cutting gun (1), and the position of the ignition port is lower than that of the billet flame cutting gun (1).

4. The ignition gun device using a two-stage gas ignition method according to claim 1, characterized in that: The primary ignition gun barrel (2.1) is funnel-shaped, with a cylindrical sidewall extending from the top of the funnel, and the pores are evenly distributed on the cylindrical sidewall.

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