Parallel device for conveying laser cladding shielding gas

Abstract

The utility model relates to a parallel device for conveying laser cladding shielding gas, which comprises a plurality of inert gas steel cylinders and a gas conveying header pipe, the gas output end of the gas conveying header pipe is sequentially provided with an output main valve, a low-pressure alarm device and a pressure reducer according to the gas output direction, and the outlet of the pressure reducer is provided with an output hose; the gas conveying header pipe is provided with a plurality of gas inlet branch pipes corresponding to the inert gas steel cylinders in the axial direction, branch pipe valves are arranged on the gas inlet branch pipes, the inert gas steel cylinders are sequentially arranged in the axial direction of the gas conveying header pipe, and the gas conveying header pipe is located above the inert gas steel cylinders. And the plurality of gas inlet branch pipes are connected with the output ends of the corresponding inert gas steel cylinders through gas inlet branch pipe hoses. The multiple inert gas steel cylinders are safely and effectively connected in parallel, the problem that the gas carrying capacity of a single inert gas steel cylinder cannot meet the requirement for laser cladding repair work consuming long time is solved, and the quality and efficiency of laser cladding machining repair workpieces are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of inert gas storage equipment, specifically to a parallel device for conveying protective gas for laser cladding. Background Technology

[0002] Laser cladding is a cladding welding technology that adds cladding material to the surface of a substrate and uses a high-energy-density / high-power laser beam to melt / weld the material onto the substrate, thereby forming a coating layer with true metallurgical bonding on the substrate surface. This can add local value to the substrate and is an important application method in the fields of workpiece processing, repair, and refurbishment.

[0003] Any cladding or welding method should have corresponding oxygen-isolation measures for the weld pool to prevent direct or indirect local or overall oxidation during welding. Oxidation can cause defects such as porosity and slag inclusions, which seriously affect weld quality. Laser cladding technology uses inert gas as a shielding gas to protect the weld pool. Specifically, inert gas at a certain pressure is directly delivered to the weld pool to achieve the protective effect. Currently, inert gas-protected weld pools are protected by a single inert gas cylinder, which is directly delivered to the laser cladding pool through a hose after passing through a pressure reducer. If a workpiece requires long-term laser cladding repair, the laser cladding operation must be manually stopped after the single inert gas cylinder is depleted, and another fully pressurized cylinder must be used to continue the laser cladding operation. This operation is cumbersome, and manually stopping the workpiece at a location where laser cladding should not be stopped increases the possibility of defects or poses a risk to the use of the workpiece, affecting the quality of the laser cladding repair. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a parallel device for conveying protective gas in laser cladding, which solves the problem that the gas carrying capacity of a single inert gas cylinder cannot meet the needs of time-consuming laser cladding repair work.

[0005] To achieve the above objectives, the following technical solution is adopted: a parallel device for supplying protective gas for laser cladding, comprising several inert gas cylinders, a main gas supply pipe, a low-pressure alarm device, a pressure reducer, a main output valve, and an output hose.

[0006] The gas delivery main is closed at one end and serves as a gas output end at the other. The gas output end of the main is equipped with a main output valve, a low-pressure alarm device, and a pressure regulator in sequence according to the direction of gas output. An output hose is installed at the outlet of the pressure regulator. Several inlet branch pipes corresponding to inert gas cylinders are arranged axially along the main gas delivery main, and each inlet branch pipe is equipped with a branch valve.

[0007] The aforementioned inert gas cylinders are arranged sequentially along the axial direction of the gas delivery main pipe, with the gas delivery main pipe located above the inert gas cylinders. Several inlet branch pipes correspond one-to-one with the inert gas cylinders, and the inlet branch pipes are connected to the output ends of the inert gas cylinders via inlet branch pipe hoses.

[0008] Furthermore, the spacing between the several intake branch pipes installed on the main gas delivery pipe is the same, with a spacing of 550mm-650mm.

[0009] Furthermore, the gas transmission main is made of carbon steel or alloy structural steel.

[0010] Furthermore, several inert gas cylinders are arranged in parallel fixed unit frames, which are composed of several support frames connected by crossbeams in the middle. The inert gas cylinders located in the fixed unit frames are fixed to the crossbeams by iron chains.

[0011] Furthermore, the gas delivery main is located at the upper end of several support frames, and the outer wall of the pipe is connected to each support frame by pipe clamps.

[0012] Furthermore, feet are installed at the bottom of the support frame.

[0013] The beneficial effects of this invention are as follows: This invention safely and effectively connects multiple inert gas cylinders in parallel, solving the problem that the gas capacity of a single inert gas cylinder cannot meet the needs of time-consuming laser cladding repair work. It avoids the need to manually stop the laser cladding operation after a single inert gas cylinder is depleted and replace it with another fully pressurized cylinder to continue the laser cladding process. This simplifies the operation process, eliminates the possibility of defects, reduces the risk of affecting the use of the workpiece, and improves the quality and efficiency of laser cladding repair. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 A schematic diagram showing the connection relationship between the support frame, the main gas delivery pipe, and the inert gas cylinder;

[0016] Figure 3 This is a schematic diagram of the gas output end of the gas delivery main.

[0017] As shown in the figure: 1. Inert gas cylinder; 2. Gas delivery main pipe; 3. Low pressure alarm device; 4. Pressure reducer; 5. Pressure reducer; 6. Output hose; 7. Support frame; 8. Crossbeam; 9. Foot; 10. Chain; 11. Inlet branch pipe hose; 12. Pipe clamp; 201. Inlet branch pipe; 202. Branch pipe valve. Detailed Implementation

[0018] Example 1

[0019] Taking standard argon as the inert gas for laser cladding as an example, a commonly used 40L standard argon cylinder in industry has a pressure of approximately 13MPa when full. Since the protective gas pressure in laser cladding equipment is relatively low, the cylinder pressure needs to be reduced to 5 bar (0.5MPa) using a pressure reducer before the argon is delivered to the equipment. As the cylinder pressure decreases with use, the amount of gas inside continuously diminishes, and the pressure decreases further. When the pressure drops to 0.5MPa, another cylinder needs to be used to continue the laser cladding operation. This process can last approximately 150 minutes, meaning that the gas capacity of a single cylinder is typically only sufficient for about 150 minutes of laser cladding operation.

[0020] The following description, in conjunction with the accompanying drawings, further illustrates the points, such as... Figure 1-3 As shown, this example provides a parallel device for supplying protective gas during laser cladding, comprising several inert gas cylinders 1, a gas supply main pipe 2, a low-pressure alarm device 3, a pressure reducer 4, a main output valve 5, an output hose 6, and a fixing unit frame for securing the inert gas cylinders.

[0021] It is known that the longest single laser cladding repair process currently produced is about 760 minutes. Based on the gas capacity of a single gas cylinder, it can be estimated that the laser cladding operation time can be met by using 6 inert gas cylinders connected in parallel in this example.

[0022] In this example, the gas delivery main pipe 2 is made of carbon steel or alloy structural steel. One end of the gas delivery main pipe 2 is closed, and the other end serves as the gas output end. At the gas output end of the gas delivery main pipe 2, in the direction of gas output, an output main valve 5, a low-pressure alarm device 3, and a pressure regulator 4 are sequentially installed. An output hose 6 is installed at the outlet of the pressure regulator 4. Six inlet branch pipes 201, corresponding to the inert gas cylinder 1, are arranged axially along the gas delivery main pipe 2. The spacing between the inlet branch pipes 201 is the same, ranging from 550mm to 650mm. Each inlet branch pipe 201 is equipped with a branch valve 202.

[0023] This example uses seven support frames 7 arranged in parallel. Each support frame 7 is connected in the middle by a crossbeam 8 to form six parallel fixed unit frames. Each support frame 7 has a base 9 installed at its bottom. Six inert gas cylinders 1 are arranged within each fixed unit frame, sequentially along the axial direction of the gas delivery main pipe 2. Each inert gas cylinder 1 is fixed to the crossbeam 8 by a chain 10. The gas delivery main pipe 2 is located above the inert gas cylinders, specifically at the upper end of the support frame 7, ensuring a one-to-one correspondence between the inlet branch pipe 201 and the inert gas cylinder 1. The inlet branch pipe 201 is connected to the output end of the inert gas cylinder 1 via an inlet branch pipe hose 11. The outer wall of the gas delivery main pipe 2 is connected to each support frame 7 by pipe clamps 12, fixing it to the parallel fixed unit frames.

[0024] Pressure reducer 4 is used to convert the high pressure of inert gas cylinder 1 into the low pressure used for laser cladding;

[0025] Low-pressure alarm device 3 is used for low-pressure alarm, alerting operators to pay attention to the pressure of the currently operating inert gas cylinder 1;

[0026] The output hose 6 is used to deliver the converted low-pressure inert gas to the laser cladding pool as a protective gas.

[0027] An application of a parallel device for supplying protective gas in laser cladding according to this embodiment includes the following situation: six inert gas cylinders are numbered sequentially.

[0028] When the laser cladding equipment is repairing small parts that take less than 150 minutes to process, the main output valve 5 is normally open, controlling the opening of branch valve 202 of inert gas cylinder 1 (number 1), while the branch valves 202 of other inert gas cylinders 1 are closed, and the low-pressure alarm device 3 is energized. The pressure regulator 4 is set to a pressure of 5 bar suitable for laser cladding operations. The valve of inert gas cylinder 1 (number 1) is opened to supply inert gas as a protective gas.

[0029] If the No. 1 inert gas cylinder is at full capacity, it is sufficient to meet the needs of this laser cladding equipment repair and processing operation;

[0030] If some gas was used in the previous laser cladding operation, and the carrier gas pressure was approximately 5 MPa, after this laser cladding operation, once the carrier gas volume in cylinder 1 decreases and the pressure drops below 5 bar, then the valve of cylinder 2 (inert gas cylinder 1) is opened. At this time, the branch valve 202 controlling cylinder 1 is closed, and simultaneously the branch valve 202 controlling cylinder 2 is quickly opened to transport the inert gas from cylinder 2 to the laser cladding molten pool. Finally, the valve of cylinder 1 (inert gas cylinder 1) is closed, and so on.

[0031] When the laser cladding equipment repairs large workpieces that take more than 150 minutes, the main output valve 5 is normally open, opening the valves at the top of all inert gas cylinders 1 and all branch valves 202. The pressure regulator 4 is set to a pressure suitable for laser cladding operations. The gas capacity of all six inert gas cylinders 1 is simultaneously delivered to the laser cladding bath. At this time, the total gas capacity is much greater than the amount of inert gas required for the workpiece to be repaired by the laser cladding equipment in one operation.

[0032] This utility model is not limited to this embodiment. Any equivalent concept or modification within the technical scope disclosed in this utility model shall be included in the protection scope of this utility model.

Claims

1. A parallel device for supplying protective gas during laser cladding, characterized in that, It includes several inert gas cylinders (1), a gas delivery main pipe (2), a low-pressure alarm device (3), a pressure reducer (4), a main output valve (5), and an output hose (6). The gas delivery main pipe (2) is closed at one end and serves as a gas output end at the other end. The gas output end of the gas delivery main pipe (2) is sequentially equipped with an output main valve (5), a low-pressure alarm device (3), and a pressure reducer (4) according to the direction of gas output. An output hose (6) is installed at the outlet of the pressure reducer (4). Several inlet branch pipes (201) corresponding to the inert gas cylinders (1) are arranged axially along the gas delivery main pipe (2). Each inlet branch pipe (201) is equipped with a branch valve (202). The inert gas cylinders (1) are arranged sequentially along the axial direction of the gas delivery main pipe (2). The gas delivery main pipe (2) is located above the inert gas cylinders (1). The inlet branch pipes (201) correspond one-to-one with the inert gas cylinders (1), and the inlet branch pipes (201) are connected to the output end of the inert gas cylinders (1) through the inlet branch pipe hose (11).

2. The parallel device for supplying protective gas for laser cladding according to claim 1, characterized in that, The spacing between the several inlet branch pipes (201) arranged on the gas delivery main pipe (2) is the same, and the spacing is 550mm-650mm.

3. The parallel device for supplying protective gas for laser cladding according to claim 2, characterized in that, The gas transmission main (2) is made of carbon steel or alloy structural steel.

4. The parallel device for supplying protective gas for laser cladding according to any one of claims 1-3, characterized in that, The inert gas cylinders (1) are arranged in parallel fixed unit frames. The parallel fixed unit frames are composed of several support frames (7). The middle sections of the support frames (7) are connected by crossbeams (8). The inert gas cylinders (1) located in the fixed unit frames are fixed to the crossbeams by iron chains (10).

5. The parallel device for supplying protective gas for laser cladding according to claim 4, characterized in that, The gas delivery main pipe (2) is arranged at the upper end of several support frames (7), and the outer pipe wall is connected to each support frame (7) by pipe clamps (12).

6. The parallel device for supplying protective gas for laser cladding according to claim 5, characterized in that, The support frame (7) is fitted with feet (9) at its bottom.

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