Gas source control valve group of laser welding machine

Abstract

The utility model discloses an air source control valve group of a laser welding machine. The air source control valve group comprises a manual pressure reducing valve, a pressure gauge, an overflow pressure stabilizing valve, a stainless steel switch valve, an electric contact pressure gauge and a manual direction switching valve, the manual direction switching valve is installed in the middle of the gas source pipeline and divides the gas source pipeline into two sections, each section is connected with an electric contact pressure gauge and a branch pipeline A, and the branch pipeline A is sequentially connected with a stainless steel switch valve and an overflow pressure stabilizing valve in series; a main pipeline is connected to the manual direction switching valve, and a manual pressure reducing valve, a pressure gauge and a stainless steel switch valve are sequentially connected to the main pipeline in series; a branch pipeline B is connected between an outlet gas path of the manual pressure reducing valve and the stainless steel switch valve, and the stainless steel switch valve, the manual pressure reducing valve and the pressure gauge are sequentially connected to the branch pipeline B in series. According to the utility model, the stability problem of the gas source control valve group of the laser welding machine is solved, the stability of the valve group is greatly improved, the processing efficiency is greatly improved when the valve group is abnormal, and the non-stop processing of a production line can be realized.

Description

Technical Field

[0001] This utility model relates to the field of gas source control technology for laser welding machines, specifically a gas source control valve group for laser welding machines. Background Technology

[0002] During the welding process, laser welding machines must ensure that the pressure of the purging helium gas is within the normal range (0.45 MPa-0.8 MPa) to guarantee welding in a helium atmosphere and ensure weld quality. The pressure control of the purging helium gas relies on the control valve assembly at its gas source. As a critical piece of equipment in the entire pickling and rolling line, a malfunction of the laser welding machine can lead to the shutdown of the entire line, resulting in significant losses. Furthermore, helium gas is essential for stable laser welding. Unstable helium pressure can cause poor weld quality or weld breakage; excessively low helium pressure can trigger serious malfunction alarms in the welding machine, preventing welding and ultimately causing the entire pickling and rolling line to shut down.

[0003] The original gas source control valve assembly of the laser welding machine has a high failure rate, frequently experiencing problems such as gas leaks, inability to adjust gas pressure, or inability to switch between valves, resulting in poor welding or machine downtime. Furthermore, after a failure, the entire valve assembly must be replaced, which is time-consuming. This spare part is imported, presenting a series of challenges including high value, long ordering cycles, and difficulty in procuring it. Utility Model Content

[0004] The purpose of this utility model is to provide a gas source control valve group for laser welding machines to ensure the continuous and stable operation of the production line and solve the stability problem of the gas source control valve group for laser welding machines.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gas source control valve assembly for a laser welding machine, comprising a gas source pipeline and a fixed base plate for assembling the valve assembly components together. The valve assembly components include a manual pressure reducing valve, a pressure gauge, an overflow pressure regulating valve, a stainless steel switch valve, an electric contact pressure gauge, and a manual directional switching valve. The manual directional switching valve is installed in the middle of the gas source pipeline, dividing the gas source pipeline into two sections. Each section is connected to an electric contact pressure gauge and a branch pipeline A. A stainless steel switch valve and an overflow pressure regulating valve are connected in series on branch pipeline A. A main pipeline is connected to the manual directional switching valve, and a manual pressure reducing valve, a pressure gauge, and a stainless steel switch valve are connected in series on the main pipeline. A branch pipeline B is connected between the outlet gas line of the manual pressure reducing valve and the stainless steel switch valve, and a stainless steel switch valve, a manual pressure reducing valve, and a pressure gauge are connected in series on branch pipeline B.

[0006] Furthermore, the gas source pipeline is provided with interfaces at both ends for connecting to external gas cylinders.

[0007] Furthermore, the manual direction switching valve is used to switch the gas supply source of the gas source pipeline.

[0008] Furthermore, the electrical contact pressure gauge is connected to the PLC of an external device.

[0009] Furthermore, the end of the main pipeline is provided with a quick connector for connection to the air pipe.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] The service life of this laser welding machine's gas source control valve assembly has been extended from the original 8 months to more than 2 years. All valve assembly components are domestically produced, and the total cost of spare parts is only 30% of the original. The stability of the valve assembly has been greatly improved, and the efficiency of handling abnormal valve assembly problems has been greatly improved, enabling uninterrupted production line operation and improving the continuous and stable operation efficiency of the production line. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure and connection of this utility model.

[0013] In the diagram: 1. Fixed base plate; 2. Manual pressure reducing valve; 3. Pressure gauge; 4. Overflow pressure regulating valve; 5. Stainless steel on / off valve; 6. Electrical contact pressure gauge; 7. Manual directional switching valve; 8. Gas source pipeline; 9. Interface; 10. Branch pipeline A; 11. Main pipeline; 12. Branch pipeline B; 13. Quick coupling. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1This embodiment of a laser welding machine gas source control valve group includes a gas source pipeline 8 and a fixed base plate 1 for assembling the valve group components together. The gas source pipeline 8 has interfaces 9 at both ends for connecting to external gas cylinders. The valve group components include a manual pressure reducing valve 2, a pressure gauge 3, an overflow pressure regulating valve 4, a stainless steel switch valve 5, an electric contact pressure gauge 6, and a manual direction switching valve 7. The manual direction switching valve 7 is used to switch the gas source supplied by the gas source pipeline 8, realizing the backup function of the gas cylinder to ensure that the gas supply is not affected during the gas exchange process. A manual directional switching valve 7 is installed in the middle of the gas source pipeline 8, dividing the gas source pipeline 8 into two sections. Each section is connected to an electric contact pressure gauge 6 and a branch pipeline A10. The electric contact pressure gauge 6 is connected to the PLC of an external device and can provide an early warning function when the gas cylinder pressure is too low. A stainless steel switch valve 5 and an overflow pressure regulating valve 4 are connected in series on the branch pipeline A10. When the gas cylinder pressure is too high, the valve automatically releases pressure to protect the valve components from damage. The manual directional switching valve 7 is connected to the main pipeline 11. A manual pressure reducing valve 2, a pressure gauge 3, and a stainless steel switch valve 5 are connected in series on the main pipeline 11. A branch pipeline B12 is connected between the outlet gas line of the manual pressure reducing valve 2 and the stainless steel switch valve 5. A stainless steel switch valve 5, a manual pressure reducing valve 2, and a pressure gauge 3 are connected in series on the branch pipeline B12. A quick connector 13 for connecting to a gas pipe is reserved at the end of the main pipeline 11. Specifically, the gas pressure in the cylinder can be manually adjusted using the manual pressure reducing valve 2 and pressure gauge 3. The valve automatically releases pressure when the output pressure at the regulating valve is too high to prevent damage to gas supply pipeline components caused by excessively high supply pressure due to malfunction of the pressure reducing valve. A stainless steel switch valve 5 and quick connector 13 are connected to the outlet gas line of the manual pressure reducing valve 2, enabling effective gas line cutoff and quick replacement.

[0016] In the above embodiments, the manual directional switching valve 7 is used to switch the gas supply source, thus achieving the purpose of one valve for one use. The overflow pressure regulating valve 4 releases when the gas source pressure is too high, thereby ensuring that the gas line pressure does not exceed the critical value, thus ensuring the safety of the device. The electric contact pressure gauge 6 is connected to the equipment PLC. When the gas supply pressure is too low and does not meet the usage requirements, an early warning can be set, thereby ensuring that the gas source can be replaced in time without affecting the gas supply. The manual pressure reducing valve 2 can adjust the gas supply pressure of the main pipeline 11 from 15 MPa to the pressure range (0.5-0.7 MPa) required for equipment use. At the same time, the manual pressure reducing valve 2 on the branch pipeline B12 ensures that the pressure in the gas line after pressure reduction is within the safe range, and releases when the pressure exceeds the safe range. The pressure gauge 3 can intuitively display the adjusted pressure, which is convenient for manual adjustment. The stainless steel switch valve 5 can manually switch the gas line, which is convenient for quick replacement of damaged components on the valve group and realizes the function of quick recovery after abnormal damage to the valve group components. The fixed base plate 1 assembles the valve group components together to form a whole, which is convenient for installation and has overall stability.

[0017] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas source control valve assembly for a laser welding machine, comprising a gas source pipeline (8) and a fixed base plate (1) for assembling the valve assembly components together, characterized in that: The valve assembly components include a manual pressure reducing valve (2), a pressure gauge (3), an overflow pressure regulating valve (4), a stainless steel switch valve (5), an electric contact pressure gauge (6), and a manual directional switching valve (7). The manual directional switching valve (7) is installed in the middle of the gas source pipeline (8) to divide the gas source pipeline (8) into two sections. Each section is connected to an electric contact pressure gauge (6) and a branch pipeline A (10). The branch pipeline A (10) is connected in series with the stainless steel switch valve (5) and the overflow pressure regulating valve (4). The manual directional switching valve (7) is connected to a main pipeline (11). The main pipeline (11) is connected in series with the manual pressure reducing valve (2), the pressure gauge (3), and the stainless steel switch valve (5). The outlet gas line of the manual pressure reducing valve (2) is connected to the stainless steel switch valve (5) via a branch pipeline B (12). The branch pipeline B (12) is connected in series with the stainless steel switch valve (5), the manual pressure reducing valve (2), and the pressure gauge (3).

2. The laser welding machine gas source control valve assembly according to claim 1, characterized in that: The gas source pipeline (8) is provided with interfaces (9) at both ends for connecting to external gas cylinders.

3. The laser welding machine gas source control valve assembly according to claim 1, characterized in that: The manual direction switching valve (7) is used to switch the gas supply source of the gas supply pipeline (8).

4. The laser welding machine gas source control valve assembly according to claim 1, characterized in that: The electrical contact pressure gauge (6) is connected to the PLC of an external device.

5. The laser welding machine gas source control valve assembly according to claim 1, characterized in that: The end of the main pipeline (11) is provided with a quick connector (13) for connection with the trachea.

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