Improved high-efficiency gas cutting nozzle

Abstract

The utility model discloses an improved high -efficient gas cutting nozzle relates to gas cutting nozzle technical field, including main pipe and gas cutting nozzle main part, the gas cutting nozzle main part is the hollow round table shape structure of front end thin, rear end thick, and its front end is equipped with the injection port for the injection cutting gas, and the rear end is equipped with the air inlet interface of intercommunication with outside gas source, the inside of gas cutting nozzle main part is provided with the airflow channel, and this inside airflow channel is located in the gas cutting nozzle main part. The utility model discloses through the inside of improved gas cutting nozzle airflow channel can make cutting gas form more stable, more efficient flow state, such as the gradually reduced type channel makes gas accelerate and forms stable laminar flow, cooperates the size and shape of improved injection port, makes cutting gas injection speed and concentration better, and the cutting time is shortened significantly.

Description

Technical Field

[0001] This utility model relates to the field of gas cutting nozzle technology, specifically an improved high-efficiency gas cutting nozzle. Background Technology

[0002] Flame cutting is a common method for rough processing of steel plates. Flame cutting is also known as gas cutting. Traditionally, acetylene gas was used for cutting, then propane was used, and now natural gas cutting has emerged. Due to the abundant reserves, low price, and pollution-free characteristics of natural gas, it has become the first choice for flame cutting. Natural gas flame cutting usually involves adding natural gas additives to generate new types of flame cutting gas.

[0003] Maintenance workers widely use the No. 2 cutting nozzle of the 100-type cutting torch in their daily work. It can only cut steel up to 100mm thick, and the cutting time is long and the cutting gap is large, which wastes steel. In large machinery manufacturing, the cutting capacity is limited and there are problems of efficiency and material waste. The insufficient cutting thickness can lead to delays in project progress or additional costs.

[0004] Therefore, an improved high-efficiency gas cutting nozzle is proposed. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model proposes an improved high-efficiency gas cutting nozzle.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an improved high-efficiency gas cutting nozzle, comprising a main pipe and a gas cutting nozzle body, wherein the gas cutting nozzle body is a hollow frustum-shaped structure with a thin front end and a thick rear end, the front end is provided with a nozzle for spraying cutting gas, and the rear end is provided with an air inlet connected to an external gas source. The gas cutting nozzle body has an internal airflow channel. The airflow channel is located inside the gas cutting nozzle body. The internal shape of the airflow channel from the air inlet to the nozzle is divided into three sections: a contraction section, a throat, and an expansion section. The transition between the throat, the contraction section, and the expansion section is smooth, and the channel wall is smooth without any protrusions.

[0007] Preferably, the outer wall of the gas cutting nozzle body is provided with connecting bolts for installation and fixation, the connecting bolts are provided with internal threads, the mating end of the main pipe is fixedly installed with a connecting pipe, and the outside of the connecting pipe is provided with external threads that mate with the threads of the connecting bolts.

[0008] Preferably, the bottom of the main pipe is provided with an oxygen pipe connected to the main pipe, the tail end of the main pipe is provided with a gas pipe connected to the main pipe, and the connecting pipe is provided with a docking hole corresponding to the air inlet.

[0009] Preferably, the diameter of the spray nozzle is 1.2 to 1.5 mm, the length is 2 to 3 mm, the shape is cylindrical, and the edge of the spray nozzle is chamfered.

[0010] Preferably, the contraction section has a gradually contracting shape, the throat is the smallest diameter part of the gas cutting nozzle body and is connected to the end of the contraction section, the expansion section is located after the throat and has a gradually expanding shape, and the contraction section, throat and expansion section form a Laval nozzle structure.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, through the cooperation between the throat, the contraction section and the expansion section, forms a Laval nozzle inside the gas cutting nozzle body. The improved internal airflow channel of the gas cutting nozzle enables the cutting gas to form a more stable and efficient flow state. For example, the tapered channel accelerates the gas and forms a stable laminar flow. Combined with the optimized nozzle size and shape, the cutting gas injection speed and concentration are better, significantly shortening the cutting time.

[0012] 2. By optimizing the shape and size of the internal airflow channel of the cutting nozzle, this utility model increases the thickness of the steel that can be cut from the original 100mm to 150mm, thus broadening the application range of the gas cutting nozzle in the field of thick steel plate cutting. It can meet the needs of more industrial scenarios for thick steel cutting, such as large machinery manufacturing and heavy equipment manufacturing, and effectively solves the limitation problem of insufficient cutting thickness of traditional cutting nozzles. Attached Figure Description

[0013] Figure 1 This is a first perspective structural diagram of the present utility model; Figure 2 This is a three-dimensional structural diagram of the second appearance of the present utility model; Figure 3 A three-dimensional structural diagram of the connecting bolts and air intake interface of this utility model; Figure 4 This is a schematic diagram of the internal three-dimensional structure of the gas cutting nozzle body of this utility model.

[0014] In the diagram: 1. Main pipe; 101. Gas pipe; 102. Oxygen pipe; 103. Connecting pipe; 104. External thread; 105. Connecting hole; 2. Gas cutting nozzle body; 201. Connecting bolt; 202. Internal thread; 203. Air inlet; 204. Throat; 205. Contraction section; 206. Expansion section; 207. Injection port. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0016] The embodiments of this utility model will be described below based on its overall structure.

[0017] Please see Figures 1-4 An improved high-efficiency gas cutting nozzle includes a main pipe 1 and a gas cutting nozzle body 2. The gas cutting nozzle body 2 is a hollow frustum-shaped structure with a thin front end and a thick rear end. Its front end is provided with a nozzle 207 for spraying cutting gas, and its rear end is provided with an air inlet 203 connected to an external gas source. The gas cutting nozzle body 2 has an internal airflow channel. The airflow channel is located inside the gas cutting nozzle body 2. The internal shape of the airflow channel from the air inlet 203 to the spray port 207 is divided into three sections: a contraction section 205, a throat 204, and an expansion section 206. The transition between the throat 204, the contraction section 205, and the expansion section 206 is smooth, and the channel wall is smooth without protrusions. The outer wall of the gas cutting nozzle body 2 is provided with a connecting bolt 201 for installation and fixation. The connecting bolt 201 has an internal thread 202. The mating end of the main pipe 1 is fixedly installed with a connecting pipe 103. The outside of the connecting pipe 103 has an external thread 104 that mates with the thread of the connecting bolt 201.

[0018] Please see Figure 3 and Figure 4 The bottom of the main pipe 1 is provided with an oxygen pipe 102 connected to the main pipe 1, and the tail end of the main pipe 1 is provided with a gas pipe 101 connected to the main pipe 1. The connecting pipe 103 is provided with a docking hole 105 corresponding to the air inlet interface 203. The diameter of the injection port 207 is 1.2 to 1.5 mm, the length is 2 to 3 mm, its shape is cylindrical, and the edge of the injection port 207 is chamfered.

[0019] Please see Figure 1 and Figure 2 The contraction section 205 has a gradually contracting shape, the throat 204 is the smallest diameter part of the gas cutting nozzle body 2, and is connected to the end of the contraction section 205. The expansion section 206 is located after the throat 204 and has a gradually expanding shape. The contraction section 205, the throat 204 and the expansion section 206 form the Laval nozzle structure.

[0020] Working principle: During use, the nozzle body 2 is installed on the outside of the connecting pipe 103 using connecting bolts 201. The external thread 104 and internal thread 202 are threaded together to easily connect the nozzle body 2 to the main pipe 1. At the same time, the gas pipe 101 and oxygen pipe 102 fill the main pipe 1 with gas. The nozzle body 2 forms a Laval nozzle through the contraction section 205, throat 204 and expansion section 206. The improved internal airflow channel of the nozzle allows the cutting gas to form a more stable and efficient flow state. Due to the optimized design of the airflow channel and nozzle 207, the stability and concentration of the flame are better during the cutting process, resulting in a smaller and more uniform cutting gap and a smoother cutting surface. This reduces the generation of cutting defects such as slag and pits, improves the dimensional accuracy and surface quality of the cut parts, reduces the difficulty and cost of subsequent processing steps, and thus improves the overall quality of the product.

[0021] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An improved high-efficiency gas cutting nozzle, comprising a main pipe (1) and a gas cutting nozzle body (2), characterized in that: The gas cutting nozzle body (2) is a hollow frustum-shaped structure with a thin front end and a thick rear end. Its front end is provided with a nozzle (207) for spraying cutting gas, and its rear end is provided with an air inlet (203) connected to an external gas source. The gas cutting nozzle body (2) is provided with an airflow channel inside. The airflow channel is located inside the gas cutting nozzle body (2). The internal shape of the airflow channel from the air inlet (203) to the spray port (207) is set as three sections: a contraction section (205), a throat (204), and an expansion section (206). The transition between the throat (204), the contraction section (205), and the expansion section (206) is smooth, and the channel wall is smooth without protrusions.

2. The improved high-efficiency gas cutting nozzle according to claim 1, characterized in that: The outer wall of the gas cutting nozzle body (2) is provided with connecting bolts (201) for installation and fixation. The connecting bolts (201) are provided with internal threads (202). The connecting pipe (103) is fixedly installed at the docking end of the main pipe (1). The connecting pipe (103) is provided with external threads (104) that are threaded with the connecting bolts (201).

3. The improved high-efficiency gas cutting nozzle according to claim 2, characterized in that: The bottom of the main pipe (1) is provided with an oxygen pipe (102) connected to the main pipe (1), the tail end of the main pipe (1) is provided with a gas pipe (101) connected to the main pipe (1), and the connecting pipe (103) is provided with a docking hole (105) corresponding to the air inlet (203).

4. The improved high-efficiency gas cutting nozzle according to claim 1, characterized in that: The nozzle (207) has a diameter of 1.2 to 1.5 mm and a length of 2 to 3 mm. It is cylindrical in shape and the edges of the nozzle (207) are chamfered.

5. An improved high-efficiency gas cutting nozzle according to claim 1, characterized in that: The contraction section (205) has a gradually contracting shape, the throat (204) is the smallest diameter part of the gas cutting nozzle body (2) and is connected to the end of the contraction section (205). The expansion section (206) is located after the throat (204) and has a gradually expanding shape. The contraction section (205), the throat (204) and the expansion section (206) form a Laval nozzle structure.

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