Laser welding protective gas pressure detection filtering device

Abstract

The utility model relates to laser welding technical field especially relates to a kind of laser welding protective gas pressure detection filtering device, including air inlet pipeline, air inlet pipeline gas inlet port is equipped with pressure controller, air inlet pipeline gas outlet side is equipped with solenoid valve, air inlet pipeline gas outlet port is equipped with pressure sensor, separator and filter are successively installed in air inlet pipeline middle part, air inlet pipeline gas inlet side, separator and filter connection side and filter gas outlet side are all equipped with differential pressure gauge. By making protective gas successively through separator and filter, thereby double interception filtering to the impurity in protective gas, avoid impurity and molten metal reaction to weld defect, etch welding head lens, increase maintenance cost, and avoid impurity block pipeline, cause pressure fluctuation, wherein the setting of differential pressure gauge, the pressure value after protective gas passes through separator and filter is monitored respectively, avoid filter being blocked by impurity and unknow, affect air intake, and then lead to pressure fluctuation.

Description

Technical Field

[0001] This utility model relates to the field of laser welding technology, and in particular to a laser welding protective gas pressure detection and filtering device. Background Technology

[0002] With the advent of Industry 4.0, intelligent manufacturing has become an important direction for the transformation and upgrading of the manufacturing industry. As one of the key pieces of equipment in intelligent manufacturing, laser welding machines are widely used in aerospace, automotive manufacturing, electronics and electrical appliances and other fields due to their high efficiency and flexibility.

[0003] In laser welding, the purity and pressure stability (maintained at 0.2-0.5 MPa) of the shielding gas are crucial to weld quality. Currently, in some laser welding processes, the gas output from the cylinder directly enters the delivery pipeline and pressure detection module. Impurities such as moisture, oil, dust (particle size often <5μm), and metal particles contained in the gas are directly mixed into the welding area without any hindrance. This not only compromises the purity of the shielding gas but also interferes with pressure detection and control. Impurities react with the molten metal, causing weld defects, corroding the welding head lens, and increasing maintenance costs. Dust and other contaminants can also clog pipelines, causing pressure fluctuations, and adhere to the pressure sensor probe, forming scale that increases detection errors beyond ±0.05 MPa. This leads to inaccurate flow controller adjustments, resulting in weld oxidation or weld beads. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a laser welding protective gas pressure detection and filtration device, which solves the technical problems of existing technologies that allow protective gas to directly enter the delivery pipeline and pressure detection module without any obstruction, resulting in impurities in the gas reacting with the molten metal to cause weld defects, corrosion of the welding head lens, increased maintenance costs, and impurities clogging the pipeline and causing pressure fluctuations.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a laser welding protective gas pressure detection and filtration device, including an inlet pipe, a pressure controller installed at the inlet port of the inlet pipe, a solenoid valve for starting and stopping gas delivery installed at the outlet side of the inlet pipe, a pressure sensor for detecting the amount of protective gas output installed at the outlet port of the inlet pipe, a separator for coarse filtration of impurities in the protective gas and a filter for fine filtration installed sequentially in the middle of the inlet pipe, and differential pressure gauges installed at the inlet side of the inlet pipe, the connection side of the separator and the filter, and the outlet side of the filter to monitor the gas flow differential pressure value in real time.

[0006] A further improvement is that the solenoid valve, pressure sensor, and differential pressure gauge are all electrically connected to the pressure controller. The pressure controller is equipped with a control display screen on top that displays the gas pressure values ​​of each part of the intake pipe in real time, and a pressure alarm light is installed on one side of its top.

[0007] A further improvement is that the separator is a conical funnel structure that is wider at the top and narrower at the bottom. A circulation plate for forced gas rotation is installed on the bottom side of the air outlet at the top of the separator. A valve is installed at the bottom of the separator, and a sludge collection box is installed at the bottom exhaust port through a sealing flange. A check plate is installed inside the sludge collection box to prevent impurities from flowing back up.

[0008] A further improvement is that the outer shell of the sludge collection box is made of explosion-proof tempered glass, the anti-reverse plate has a conical structure, and a through hole is opened in the center of it.

[0009] A further improvement is that the bottom of the filter has a groove structure, and its inner wall is equipped with a coarse filter element and a fine filter element from bottom to top. The coarse filter element is composed of a polyester fiber layer, a glass fiber layer and a metal mesh stacked in sequence, and the fine filter element is composed of two sets of molecular sieves stacked together, with an activated carbon layer filling the middle of the two.

[0010] A further improvement is that both the coarse filter element and the fine filter element are conical structures, and the middle and bottom of the inner wall of the filter are respectively staggered with drainage grooves, and the middle and bottom drainage grooves are connected by transverse grooves.

[0011] A further improvement is that a drain pipe is installed on one side of the bottom of the filter, and an electric sealing valve is installed on the drain pipe.

[0012] By employing the above technical solution, this utility model provides a laser welding shielding gas pressure detection and filtering device, which has at least the following beneficial effects: 1. This utility model achieves double interception and filtration of impurities in the protective gas by passing it sequentially through a separator and a filter. This prevents impurities from reacting with molten metal, causing weld defects, corroding the welding head lens, increasing maintenance costs, and clogging the pipeline, thus avoiding pressure fluctuations. The differential pressure gauge is set to monitor the pressure value of the protective gas after passing through the separator and filter, preventing the filter from being blocked by impurities without the person noticing, which would affect the air intake and thus cause pressure fluctuations.

[0013] 2. In this invention, after the gas is coarsely filtered, it enters the filter and passes through the coarse filter element and the fine filter element in sequence. The polyester fiber layer in the coarse filter element further intercepts impurities in the gas. The glass fiber layer allows tiny oil mists to collide and condense into large droplets through Brownian motion. When the gas after secondary filtration passes through the molecular sieve, it adsorbs and intercepts trace amounts of moisture in the gas. The activated carbon layer adsorbs oil vapor, thereby achieving a third filtration and interception. Attached Figure Description

[0014] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0015] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the internal structure of the separator of this utility model; Figure 3 This is a cross-sectional view of the internal structure of the filter of this utility model; Figure 4 This is a cross-sectional schematic diagram of the independent structure of the filter of this utility model; Figure 5 This is a schematic diagram of the cross-section of the coarse filter element of this utility model; Figure 6 This is a schematic diagram of the cross-section of the fine filter element of this utility model.

[0016] In the diagram: 1. Intake pipe; 2. Pressure controller; 21. Control display screen; 32. Pressure alarm light; 3. Solenoid valve; 4. Pressure sensor; 5. Separator; 51. Circulation plate; 52. Valve; 53. Sludge collection box; 54. Check plate; 6. Filter; 61. Coarse filter element; 611. Polyester fiber layer; 612. Glass fiber layer; 613. Metal mesh; 62. Fine filter element; 621. Molecular sieve; 622. Activated carbon layer; 63. Drainage channel; 64. Horizontal channel; 65. Drain pipe; 66. Electric sealing valve; 7. Differential pressure gauge. Detailed Implementation

[0017] 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.

[0018] Current technologies directly introduce protective gas into the delivery pipeline and pressure detection module, leaving impurities in the gas unimpeded. These impurities react with the molten metal, causing weld defects, corrosion of the welding head lens, and increased maintenance costs. Furthermore, impurities can clog the pipeline, leading to pressure fluctuations. This embodiment provides a laser welding protective gas pressure detection and filtering device that filters the protective gas, preventing impurities from entering the welding area and causing weld defects, corrosion of the welding head lens, and errors in pressure detection. Please refer to... Figures 1-6The laser welding shielding gas pressure detection and filtration device includes an inlet pipe 1, a pressure controller 2 installed at the inlet port of the inlet pipe 1, a solenoid valve 3 for starting and stopping gas delivery installed at the outlet side of the inlet pipe 1, a pressure sensor 4 for detecting the amount of shielding gas output installed at the outlet port of the inlet pipe 1, a separator 5 for coarse filtration of impurities in the shielding gas and a filter 6 for fine filtration installed sequentially in the middle of the inlet pipe 1, and differential pressure gauges 7 are installed on the inlet side of the inlet pipe 1, the connection side of the separator 5 and the filter 6, and the outlet side of the filter 6 to monitor the gas flow differential pressure value in real time; when the shielding gas passes through the inlet pipe 1... When the gas flows through the gas pipeline 1, it passes through the separator 5 and the filter 6 in sequence, thereby performing double interception and filtration of impurities in the protective gas. This prevents impurities from reacting with the molten metal, causing weld defects, corroding the welding head lens, increasing maintenance costs, and preventing impurities from clogging the pipeline and causing gas pressure fluctuations. The differential pressure gauge 7 is set to monitor the pressure value of the protective gas after passing through the separator 5 and the filter 6, respectively, to prevent the filter 6 from being blocked by impurities, affecting the air intake and thus causing gas pressure fluctuations. It works in conjunction with the pressure sensor 4 at the outlet of the air intake pipeline 1 to perform the final gas pressure detection, thereby ensuring gas pressure stability.

[0019] Furthermore, the solenoid valve 3, pressure sensor 4, and differential pressure gauge 7 are all electrically connected to the pressure controller 2. The top of the pressure controller 2 is equipped with a control display screen 21 that displays the gas pressure values ​​of each section of the intake pipe 1 in real time, and a pressure alarm light 32 is installed on one side of its top. The pressure values ​​of each section of the intake pipe 1 measured by the differential pressure gauge 7 and the pressure sensor 4 are displayed on the control display screen 21, which makes it easy for the staff to intuitively observe the pressure changes of the protective gas. When the pressure value is abnormal, the pressure alarm light 32 flashes and sounds an alarm to remind the staff to deal with it in time. If it is too abnormal, the pressure controller 2 controls the solenoid valve 3 to directly cut off the gas supply and interrupt the welding process.

[0020] Specifically, the separator 5 has a conical funnel structure that is wider at the top and narrower at the bottom. A circulation plate 51 forcing gas rotation is installed on the bottom side of the air outlet at the top of the separator 5. A valve 52 is installed at the bottom of the separator 5, and a sludge collection box 53 is installed at the bottom exhaust port through a sealing flange. A check plate 54 is installed inside the sludge collection box 53 to prevent impurities from flowing back up. When the protective gas enters the interior through the upper air inlet pipe of the separator 5, under the restriction of the circulation plate 51, the gas is guided to move downward in a high-speed spiral along the inner wall of the separator 5. Centrifugal force throws large particles of impurities and liquid oil and water toward the inner wall and slides into the sludge collection box 53 for collection. When the spiral airflow reaches the bottom of the cone, the direction is reversed and it moves upward in a spiral along the center of the separator 5, entering the filter 6 for fine filtration. When there are too many impurities in the sludge collection box 53, the valve 52 is closed, and the sludge collection box 53 is removed to clean the impurities.

[0021] Specifically, the outer shell of the sludge collection box 53 is made of explosion-proof tempered glass, and the anti-reverse plate 54 has a conical structure with a through hole in the center. The explosion-proof tempered glass sludge collection box 53 allows for real-time observation of the impurities inside, facilitating timely cleaning. The conical anti-reverse plate 54 prevents the spiral airflow from re-rolling up the impurities inside the sludge collection box 53, thus affecting the filtration effect.

[0022] To enhance the filtration effect on impurities, the bottom of filter 6 has a groove structure, and its inner wall is equipped with a coarse filter element 61 and a fine filter element 62 from bottom to top. The coarse filter element 61 is composed of a polyester fiber layer 611, a glass fiber layer 612, and a metal mesh 613 stacked sequentially. The fine filter element 62 is composed of two sets of molecular sieves 621 stacked together, with an activated carbon layer 622 filling the middle of the two. When the coarsely filtered gas enters the filter 6, it passes through the coarse filter element 61 and the fine filter element 62 in sequence. The polyester fiber layer 611 in the coarse filter element 61 further intercepts impurities in the gas. The glass fiber layer 612 allows tiny oil mists to collide and condense into large droplets through Brownian motion. The metal mesh 613 provides support to prevent the coarse filter element 61 from deforming. When the gas after secondary filtration passes through the molecular sieves 621, it adsorbs and intercepts trace amounts of moisture in the gas. The activated carbon layer 622 adsorbs oil vapor, thus achieving a third filtration and interception.

[0023] To prevent intercepted water or oil from dripping into the air intake pipe 1, both the coarse filter element 61 and the fine filter element 62 are conical structures. The middle and bottom of the inner wall of the filter 6 are staggered with drainage grooves 63, and the middle and bottom drainage grooves 63 are connected by a transverse groove 64. The intercepted water or oil slides down the conical surface of the coarse filter element 61 and the fine filter element 62 to the inner wall of the filter 6, and is guided into the bottom of the filter 6 through the drainage grooves 63. The two sets of drainage grooves 63 are staggered and connected by a transverse groove 64, thereby preventing the protective gas from escaping directly along the drainage grooves 63 and causing some gas to be unfiltered.

[0024] Furthermore, a drain pipe 65 is installed on one side of the bottom of the filter 6, and an electric sealing valve 66 is installed on the drain pipe 65; the electric sealing valve 66 is activated periodically to remove the impurities at the bottom of the filter 6 through the drain pipe 65.

[0025] It should be noted that, in this document, 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.

[0026] 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 laser welding shielding gas pressure detection and filtering device, comprising an inlet pipe (1), characterized in that: The intake port of the intake pipe (1) is equipped with a pressure controller (2), the outlet side of the intake pipe (1) is equipped with a solenoid valve (3) for starting and stopping gas delivery, the outlet port of the intake pipe (1) is equipped with a pressure sensor (4) for detecting the amount of protective gas output, the middle part of the intake pipe (1) is equipped with a separator (5) for coarse filtration of impurities in the protective gas and a filter (6) for fine filtration, and differential pressure gauges (7) are installed on the intake side of the intake pipe (1), the connection side of the separator (5) and the filter (6) and the outlet side of the filter (6) to monitor the differential pressure value of gas flow in real time.

2. The laser welding shielding gas pressure detection and filtering device according to claim 1, characterized in that: The solenoid valve (3), pressure sensor (4), and differential pressure gauge (7) are all electrically connected to the pressure controller (2). The pressure controller (2) is equipped with a control display screen (21) on top, which displays the gas pressure values ​​of each part of the intake pipe (1) in real time. A pressure alarm light (32) is installed on one side of its top.

3. The laser welding shielding gas pressure detection and filtering device according to claim 1, characterized in that: The separator (5) is a cone-shaped funnel structure that is wider at the top and narrower at the bottom. A circulation plate (51) forcing gas rotation is installed on the bottom side of the top outlet of the separator (5). A valve (52) is installed at the bottom of the separator (5). A sludge collection box (53) is installed at the bottom outlet through a sealing flange. A check plate (54) is installed inside the sludge collection box (53) to prevent impurities from flowing back up.

4. The laser welding shielding gas pressure detection and filtering device according to claim 3, characterized in that: The outer shell of the sludge collection box (53) is made of explosion-proof tempered glass, and the anti-reverse plate (54) has a conical structure with a through hole in the center.

5. The laser welding shielding gas pressure detection and filtering device according to claim 1, characterized in that: The bottom of the filter (6) has a groove structure, and its inner wall is equipped with a coarse filter element (61) and a fine filter element (62) from bottom to top. The coarse filter element (61) is composed of a polyester fiber layer (611), a glass fiber layer (612) and a metal mesh (613) stacked in sequence. The fine filter element (62) is composed of two sets of molecular sieves (621) stacked together, and the middle of the two is filled with an activated carbon layer (622).

6. The laser welding shielding gas pressure detection and filtering device according to claim 5, characterized in that: Both the coarse filter element (61) and the fine filter element (62) are conical structures. The middle and bottom of the inner wall of the filter (6) are respectively staggered with drainage grooves (63), and the middle and bottom drainage grooves (63) are connected by a transverse groove (64).

7. The laser welding shielding gas pressure detection and filtering device according to claim 1, characterized in that: A drain pipe (65) is installed on one side of the bottom of the filter (6), and an electric sealing valve (66) is installed on the drain pipe (65).

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