Airflow stabilizing device

Abstract

The utility model discloses a kind of airflow stabilizing device, the airflow stabilizing device includes: along the setting of steady voltage air cavity, airflow feedback adjusting assembly and gas path pipeline in the direction of airflow flow direction, the steady voltage air cavity is located in the side close to gas source;The airflow feedback adjusting assembly includes regulating valve, controller and gas flowmeter, the controller is respectively with the gas flowmeter and the regulating valve electric connection, for according to the detected gas flow of the gas flowmeter Control the valve opening and closing degree of the regulating valve;The gas path pipeline includes output end and input end, the input end of the gas path pipeline is connected with the steady voltage air cavity by the regulating valve, the side close to the output end of the gas path pipeline is equipped with the gas flowmeter to measure the gas flow of the gas path pipeline output.The utility model solves the problem that protective gas cannot be dynamically adjusted according to the change of laser energy during welding process, resulting in insufficient local protection or gas waste.

Description

Technical Field

[0001] This utility model belongs to the field of laser welding technology and relates to an airflow stabilization device. Background Technology

[0002] Laser welding technology is widely used in the welding and manufacturing process of power battery top covers for new energy vehicles. During laser welding, a shielding gas is typically introduced into the welding area to isolate the weld from air, prevent weld oxidation, and reduce welding defects such as porosity, bursts, and weld protrusions. In existing technologies, the shielding gas flow rate is primarily controlled using a fixed flow rate mode, where the gas flow rate is manually set to maintain a constant flow throughout the welding process. However, laser power can fluctuate during welding, and the fixed flow rate mode cannot dynamically adjust to changes in laser energy, easily leading to insufficient protection or gas waste. In actual production, gas source pressure inevitably fluctuates, and the fixed flow rate valve cannot compensate for these pressure changes in a timely manner, resulting in uneven shielding gas coverage in the welding area. Due to the unstable shielding gas flow, defects such as weld oxidation, bursts, and weld surface protrusions are easily triggered, affecting the reliability of the welding quality. Utility Model Content

[0003] The technical problem solved by this utility model is to provide an airflow stabilizing device, which solves the problem that the protective gas cannot be dynamically adjusted according to the changes in laser energy during the welding process, resulting in insufficient local protection or gas waste.

[0004] The technical solution of this utility model is: an airflow stabilizing device provided by this utility model, comprising: The pressure-stabilizing chamber, the airflow feedback adjustment component, and the air passage pipe are arranged along the airflow direction, with the pressure-stabilizing chamber located on the side closer to the air source; The airflow feedback regulation component includes a regulating valve, a controller, and a gas flow meter. The controller is electrically connected to the gas flow meter and the regulating valve, respectively, and is used to control the valve opening degree of the regulating valve according to the gas flow detected by the gas flow meter. The gas pipeline includes an output end and an input end. The input end of the gas pipeline is connected to the pressure stabilizing gas chamber through the regulating valve. A gas flow meter is provided on the side near the output end of the gas pipeline to measure the gas flow rate output by the gas pipeline.

[0005] Furthermore, the pressure-stabilizing gas chamber includes a shell, a flow-dividing orifice plate, and a porous medium. The shell is sleeved on the outside of the flow-dividing orifice plate, and the porous medium is connected to the flow-dividing orifice plate through a groove frame.

[0006] Furthermore, the outer shell is a stainless steel cylindrical shell, and the outer shell is detachably connected to the flow divider plate.

[0007] Furthermore, the flow divider plate is a cylindrical enclosure plate with a diameter smaller than that of the outer shell, and the flow divider plate is provided with a plurality of honeycomb-shaped flow divider holes.

[0008] Furthermore, the diversion hole has a hexagonal structure.

[0009] Furthermore, the slot frame is a rectangular slot frame, the slot frame is snapped into the porous medium, and the slot frame is detachably connected to the inner wall of the diversion plate.

[0010] Furthermore, the porous medium is a porous ceramic block, the porous ceramic block is a cuboid, and all sides of the porous ceramic block are in contact with the rectangular slot frame.

[0011] Furthermore, a first sealing structure is provided at the connection between the regulating valve and the pressure stabilizing air chamber, and a second sealing structure is provided at the connection between the regulating valve and the air pipeline. Both the first sealing structure and the second sealing structure are flange fastening structures, and a metal spiral wound gasket and a sealing ring are provided inside the flange fastening structure.

[0012] Furthermore, the gas pipeline includes a first gas pipeline and a second gas pipeline. The input end of the first gas pipeline is detachably connected to the output end of the pressure-stabilizing gas chamber. The gas flow meter is detachably connected to the output end of the first gas pipeline and the input end of the second gas pipeline, respectively. The output end of the second gas pipeline is connected to the welding head to output welding protective gas.

[0013] Furthermore, a third sealing structure is provided at the connection between the gas flow meter and the first gas pipeline, and a fourth sealing structure is provided at the connection between the gas flow meter and the second gas pipeline. Both the third and fourth sealing structures are flange fastening structures, and a metal spiral wound gasket and a sealing ring are provided inside the flange fastening structure.

[0014] The beneficial effects of this utility model are as follows: The airflow stabilizing device provided by this utility model consists of a pressure-stabilizing chamber, an airflow feedback adjustment component, and an air passage pipeline arranged sequentially along the airflow path. The pressure-stabilizing chamber acts as a buffer, effectively suppressing pressure fluctuations on the gas source side and ensuring that the gas entering the adjustment stage has a stable pressure, thereby improving the accuracy of airflow adjustment. The airflow feedback adjustment component adopts a feedback adjustment method using a gas flow meter, a regulating valve, and a controller, enabling the gas flow rate to be dynamically adjusted according to changes in laser power or heat input during the welding process. The gas flow meter monitors the gas flow rate at the output end in real time, and the controller adjusts the opening and closing degree of the regulating valve in a timely manner based on the detection data, achieving closed-loop control. The gas flow rate can be dynamically adjusted with fluctuations in laser power, continuously maintaining the stability of the protective airflow in the welding area, avoiding defects such as weld oxidation, porosity, or incomplete protective layer caused by insufficient gas, and improving the welding quality and consistency. When the power is low, the system automatically reduces the gas flow rate to avoid wasting gas. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of an airflow stabilization device provided in an embodiment of this application.

[0017] Figure 2 for Figure 1 A schematic diagram of the first structure of the medium-pressure stabilizing gas chamber.

[0018] Figure 3 for Figure 1 A schematic diagram of the second structure of the medium-pressure stabilizing gas chamber.

[0019] Figure 4 for Figure 1 Schematic diagram of the central sealing structure.

[0020] Explanation of reference numerals in the attached figures: 1-Pressure stabilizing chamber, 2-Airflow feedback regulating component, 3-Air path pipeline; 11-Gas chamber, 12-Diverter plate, 121-Diverter hole, 13-Porous medium, 14-Slot frame, 21-Regulating valve, 22-Gas flow meter, 23-Controller, 51-First sealing structure, 52-Second sealing structure, 53-Third sealing structure, 54-Fourth sealing structure. Detailed Implementation

[0021] 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.

[0022] In this invention, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0023] The implementation of this utility model will be described in detail below with reference to the specific accompanying drawings: Figure 1 This is a schematic diagram of the structure of an airflow stabilizing device provided in an embodiment of this application, as shown below. Figure 1 As shown, the airflow direction is as shown in direction A. Along the airflow direction, there are pressure stabilizing chamber 1, airflow feedback adjustment component 2 and air passage 3 respectively. The pressure stabilizing chamber 1 is located on the side close to the air source. The pressure stabilizing chamber plays a buffering role and can effectively suppress pressure fluctuations on the air source side, ensuring that the gas entering the adjustment link has a stable pressure, thereby improving the accuracy of airflow adjustment.

[0024] The airflow feedback regulation component 2 includes a regulating valve 21, a gas flow meter 22, and a controller 23. The controller 23 is electrically connected to both the gas flow meter 22 and the controller 23. The gas flow meter 23 measures the current real-time output of the protective gas during welding and outputs a feedback signal to the controller 23. The controller 23 compares the feedback signal with a preset value to obtain a deviation signal. The controller 23 calculates the adjustment amount based on the deviation signal using a PID control algorithm. The controller 23 generates a control command based on the adjustment amount and outputs it to the regulating valve 21 to drive the valve 21 to change its opening, thereby regulating the gas flow or pressure in the gas pipeline 3 to approach the target set value. This application automatically adjusts the protective gas flow during welding by pre-setting the gas flow required for the laser energy based on laser energy fluctuations. This avoids defects such as weld oxidation, porosity, or incomplete protective layer caused by insufficient gas. Simultaneously, it reduces the protective gas output when the welding power is low to avoid wasting gas.

[0025] Figure 2 for Figure 1 A schematic diagram of the first structure of the medium-pressure stabilizing gas chamber. Figure 3 for Figure 1 A schematic diagram of the second structure of the medium-pressure stabilizing gas chamber, combined with Figure 1 and Figure 2The pressure-stabilizing gas chamber 1 includes a housing 11, a flow divider plate 12, and a porous medium 13. The housing 11 is fitted outside the flow divider plate 12, and the porous medium 13 is disposed inside the flow divider plate 12. The porous medium 13 is detachably connected to the flow divider plate 12 through a slot frame 14.

[0026] Specifically, the flow divider plate 12 is a cylindrical enclosure with a stainless steel outer shell. The flow divider plate 12 is fitted inside the outer shell 11 and detachably connected to it. The flow divider plate 12 has a plurality of honeycomb-shaped flow divider holes 121, each with a hexagonal structure. The compact arrangement of these honeycomb hexagonal flow divider holes 121 divides the incoming gas into multiple fine streams, thus forming a uniformly distributed air curtain when the gas flows out, avoiding excessively strong local airflow or dead zones. Furthermore, the hexagonal structure offers greater structural stability and pressure resistance compared to circular or square holes, making it less prone to deformation. This ensures the flow divider effect while improving the overall strength and durability of the flow divider plate.

[0027] The slot frame 14 is a rectangular slot frame, and the porous medium 13 is a porous ceramic block. The porous medium 13 is a cuboid. The porous medium 13 is detachably connected to the inner wall of the flow divider plate 12 through the slot frame 14. The slot frame 14 fits against each side of the porous medium 13. The slot frame 14 is a rectangular slot frame, which can form a stable connection interface with the inner wall of the flow divider plate 12, avoiding the porous medium from shaking or shifting under the impact of airflow or vibration, thereby ensuring the stability of the assembly.

[0028] like Figure 1 The gas pipeline 3 shown includes a first gas pipeline 31 and a second gas pipeline 32. The length of the second gas pipeline 32 is less than the length of the first gas pipeline 31. A gas flow meter 22 is installed between the first gas pipeline 31 and the second gas pipeline 32. The output end of the second gas pipeline 32 is connected to the welding head 4. The gas flow meter 22 is located on the side close to the welding head 4 to facilitate accurate measurement of the output protective gas flow rate.

[0029] A first sealing structure 51 is provided between the output end of the regulating valve 21 and the pressure stabilizing chamber 1; a second sealing structure 52 is provided between the regulating valve 21 and the input end of the first gas pipeline 31; a third sealing structure 53 is provided between the output end of the first gas pipeline 31 and the gas flow meter 22; and a fourth sealing structure 54 is provided between the input end of the second gas pipeline 32 and the gas flow meter 22. All four sealing structures—the first, second, third, and fourth—are flange-locking structures. Figure 4As shown, a spiral wound gasket and a rubber sealing ring are provided between the flange fastening structures. The flange fastening structure can provide reliable axial preload, ensuring stable contact pressure at the sealing interface. The spiral wound gasket has the composite characteristics of metal and flexible filler material, which can withstand high temperature and pressure, and can also adapt to certain surface unevenness and thermal deformation. The rubber sealing ring provides elastic compensation in local positions, further eliminating small gaps and improving the overall sealing effect.

[0030] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0031] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. An airflow stabilizing device, characterized in that, include: The pressure-stabilizing chamber, the airflow feedback adjustment component, and the air passage pipe are arranged along the airflow direction, with the pressure-stabilizing chamber located on the side closer to the air source; The airflow feedback regulation component includes a regulating valve, a controller, and a gas flow meter. The controller is electrically connected to the gas flow meter and the regulating valve, respectively, and is used to control the valve opening degree of the regulating valve according to the gas flow detected by the gas flow meter. The gas pipeline includes an output end and an input end. The input end of the gas pipeline is connected to the pressure stabilizing gas chamber through the regulating valve. A gas flow meter is provided on the side near the output end of the gas pipeline to measure the gas flow rate output by the gas pipeline.

2. The airflow stabilizing device as described in claim 1, characterized in that, The pressure-stabilizing gas chamber includes a shell, a flow-dividing orifice plate, and a porous medium. The shell is sleeved on the outside of the flow-dividing orifice plate, and the porous medium is connected to the flow-dividing orifice plate through a groove frame.

3. The airflow stabilizing device as described in claim 2, characterized in that, The outer shell is a stainless steel cylindrical shell, and the outer shell is detachably connected to the flow divider plate.

4. The airflow stabilizing device as described in claim 3, characterized in that, The flow divider plate is a cylindrical enclosure with a diameter smaller than that of the outer shell, and the flow divider plate is provided with a plurality of honeycomb-shaped flow divider holes.

5. The airflow stabilizing device as described in claim 4, characterized in that, The diversion hole has a hexagonal structure.

6. The airflow stabilizing device as described in claim 2, characterized in that, The slot frame is a rectangular slot frame, which is snapped into the porous medium and is detachably connected to the inner wall of the diversion plate.

7. The airflow stabilizing device as described in claim 6, characterized in that, The porous medium is a porous ceramic block, which is a cuboid, and all sides of the porous ceramic block are in contact with the rectangular slot frame.

8. The airflow stabilizing device as described in claim 1, characterized in that, The connection between the regulating valve and the pressure-stabilizing gas chamber is provided with a first sealing structure, and the connection between the regulating valve and the gas pipeline is provided with a second sealing structure. Both the first sealing structure and the second sealing structure are flange fastening structures, and the flange fastening structure is provided with a metal spiral wound gasket and a sealing ring.

9. The airflow stabilizing device as described in claim 8, characterized in that, The gas pipeline includes a first gas pipeline and a second gas pipeline. The input end of the first gas pipeline is detachably connected to the output end of the pressure-stabilizing gas chamber. The gas flow meter is detachably connected to the output end of the first gas pipeline and the input end of the second gas pipeline, respectively. The output end of the second gas pipeline is connected to the welding head to output welding protective gas.

10. The airflow stabilizing device as described in claim 9, characterized in that, The gas flow meter is provided with a third sealing structure at the connection between it and the first gas pipeline, and a fourth sealing structure is provided at the connection between it and the second gas pipeline. Both the third and fourth sealing structures are flange fastening structures, and the flange fastening structure is provided with a metal spiral wound gasket and a sealing ring.

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