A detection device for the heat dissipation air duct of an electric welder

Abstract

The utility model discloses a kind of electric welding machine heat dissipation air duct detection devices, it includes detection pedestal, air duct adaptation unit and airflow monitoring unit.Detection pedestal includes bottom plate and support column, bottom plate is equipped with installation positioning hole.Air duct adaptation unit includes adjustable seal ring, radial telescopic link and sealed air bag, and it is installed in support column top by rotating support bracket.Airflow monitoring unit includes measurement conduit, wind speed sensor array and temperature sensor group, and measurement conduit is through adjustable seal ring's center hole.Signal processing module is set to the inside of bottom plate, and is connected with each sensor.Control panel is located in the middle of support column, with display screen and operation button.The device can realize non-invasive air duct performance detection, and adapt to various electric welding machine structures.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation detection technology for electric welding machines, and in particular to a heat dissipation duct detection device for electric welding machines. Background Technology

[0002] During prolonged high-load operation, welding machines generate significant heat from their internal electronic components. Inadequate heat dissipation can lead to overheating, affecting welding quality and shortening component lifespan. Currently, most welding machines employ forced-air cooling, and the design of their cooling ducts directly impacts heat dissipation efficiency. However, existing technologies lack effective methods for detecting the airflow within the welding machine's ducts, making it difficult to accurately assess duct structure defects solely through external temperature monitoring. Some detection methods require disassembling the equipment or using complex sensors, which are cumbersome and prone to interfering with the original airflow distribution. Furthermore, traditional duct testing devices often cannot adapt to the structural differences between various welding machine models, resulting in insufficient universality of test results. Therefore, there is an urgent need for a non-invasive welding machine cooling duct testing device that can monitor duct performance, is compatible with multiple models, and is easy to operate. Utility Model Content

[0003] The purpose of this utility model is to provide a detection device for the heat dissipation air duct of an electric welding machine, which solves the problems mentioned in the background art.

[0004] This invention is implemented as follows: a device for detecting the heat dissipation duct of an electric welding machine. The system includes a detection base, a duct adapter unit, and an airflow monitoring unit. The detection base consists of a base plate and a support column vertically mounted on the base plate, with multiple mounting holes on the base plate. The duct adapter unit includes an adjustable sealing ring, multiple radial telescopic rods, and a sealing airbag. The adjustable sealing ring is mounted on top of the support column via a rotating bracket, and its inner ring surface has an annular groove. Multiple radial telescopic rods are evenly distributed circumferentially along the adjustable sealing ring, with guide rollers at the inner end of each rod and connections to the sealing airbag at the outer end. The sealing airbag has an annular structure, with a pressure sensing layer on its inner surface.

[0005] The airflow monitoring unit includes a measuring duct, an array of wind speed sensors, and a group of temperature sensors. The measuring duct passes through the central hole of an adjustable sealing ring, with an inlet shroud and an outlet diffuser at its two ends. The wind speed sensor array consists of multiple hot-wire anemometers, which are equidistantly distributed along the axial direction of the measuring duct. The temperature sensor group includes multiple platinum resistance temperature probes, which are staggered on the inner wall of the measuring duct.

[0006] The detection base also includes a signal processing module housed inside the base plate. This module is connected to the pressure sensing layer, hot-wire anemometer, and platinum resistance temperature probe via data cables. A control panel with a display screen and operating buttons is located in the center of the support column.

[0007] This utility model discloses a welding machine heat dissipation duct testing device. A stable support platform is provided by the testing base. The adjustable sealing ring of the duct adapter unit, combined with a radial telescopic rod and a sealing airbag, enables rapid sealing connection with ducts of different welding machine models. The airflow monitoring unit's wind speed sensor array and temperature sensor group accurately measure the airflow parameters inside the duct. This structural arrangement allows the device to adapt to various welding machine structures, achieving non-invasive duct performance testing while ensuring the accuracy and reliability of the measurement data.

[0008] As a further improvement, the adjustable sealing ring consists of two semi-annular housings connected by a quick-lock mechanism. The inner surface of the semi-annular housing has an annular groove with a depth of five to eight millimeters, and a sealing strip is embedded in the groove.

[0009] As a further improvement, the radial telescopic rod includes an outer tube, an inner insert rod, and a locking screw. The outer wall of the outer tube is provided with a graduated scale, the inner insert rod is fitted with the outer tube with a clearance fit, and the end of the locking screw is provided with a nylon locking head.

[0010] As a further improvement, the sealing airbag is made of silicone rubber with a wall thickness of two to three millimeters. The pressure sensing layer consists of multiple miniature pressure sensors, which are evenly distributed along the circumference of the sealing airbag.

[0011] As a further improvement, the measuring conduit is made of transparent polycarbonate material with an anti-reflective coating on its inner wall. The inlet fairing has a streamlined, constricting structure, while the outlet diffuser has a conical, expanding structure.

[0012] As a further improvement, the hot-wire anemometers are fixed to the central axis of the measuring conduit by support rods, with the spacing between each hot-wire anemometer being fifty to eighty millimeters. The support rods have an airfoil-shaped cross-section.

[0013] As a further improvement, the platinum resistance temperature probe is fixed to the inner wall of the measuring conduit via a mounting base, with each probe installed at an angle of 30 to 45 degrees. The mounting base is made of thermally conductive ceramic material.

[0014] As a further improvement, the signal processing module includes an analog-to-digital converter (ADC), a data processing unit, and a data storage unit. The ADC has a sampling frequency of 10 kHz, and the data processing unit uses a 32-bit microprocessor.

[0015] As a further improvement, the control panel features an LCD touchscreen display, and the operation buttons have a waterproof, sealed structure. The control panel is connected to the signal processing module via a shielded cable.

[0016] As a further improvement, the support column has an internal cable channel with an electromagnetic shielding layer on its inner wall. A wiring port with an aviation plug structure is located at the bottom of the support column.

[0017] In summary, this utility model's welding machine heat dissipation duct testing device effectively solves key technical challenges in welding machine heat dissipation duct testing through its unique structural design. The adjustable sealing ring and radial telescopic rod enable rapid adaptation to ducts of different diameters; the combination of the sealing airbag and pressure sensing layer ensures real-time monitoring of connection sealing; and the wind speed sensor array and temperature sensor group inside the measuring duct provide accurate airflow parameter measurements. The synergistic effect of these structural features significantly improves the adaptability, accuracy, and ease of operation of duct testing, providing reliable technical support for the optimized design of welding machine heat dissipation systems. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a welding machine heat dissipation duct detection device according to the present invention; Figure 2 This is a schematic diagram of the internal structure of the air duct adapter unit according to an embodiment of this application; Figure 3 This is a schematic diagram of the airflow monitoring unit structure of a welding machine heat dissipation duct detection device according to the present invention; Explanation of reference numerals in the attached figures: 1. Testing base; 2. Base plate; 3. Support column; 4. Mounting positioning hole; 5. Duct adapter unit; 6. Adjustable sealing ring; 7. Radial telescopic rod; 8. Sealing airbag; 9. Rotating bracket; 10. Annular groove; 11. Guide roller; 12. Pressure sensing layer; 13. Airflow monitoring unit; 14. Measuring conduit; 15. Wind speed sensor array; 16. Temperature sensor group; 17. Inlet rectifier; 18. Outlet diffuser; 19. Signal processing module; 20. Control panel; 21. Display screen; 22. Operation buttons; 23. Semi-annular housing; 24. Quick lock; 25. Sealing strip; 26. Outer tube; 27. Inner rod; 28. Locking screw; 29. ​​Hot wire anemometer; 30. Platinum resistance temperature probe. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] Please see Figures 1 to 3This utility model provides a welding machine heat dissipation duct testing device, the overall structure of which includes a testing base 1, a duct adapter unit 5, and an airflow monitoring unit 13. The device provides a stable support platform through the testing base 1, the duct adapter unit 5 enables quick and reliable sealed connection with heat dissipation ducts of different welding machine models, and the airflow monitoring unit 13 accurately measures the airflow parameters inside the duct, thereby evaluating the performance of the welding machine heat dissipation duct.

[0021] Specifically, the detection base 1 is the core of the entire device's support and control. Its main structure includes a base plate 2 and a support column 3 vertically mounted on the base plate 2. The base plate 2 is a rectangular flat plate with dimensions of 800 mm in length, 600 mm in width, and 8 mm in thickness. It is made of high-strength aluminum alloy and anodized to enhance corrosion resistance and aesthetics. The base plate 2 has four mounting holes 4, such as four through holes with a diameter of 12 mm, located near the four corners of the base plate 2. These holes are used to securely fix the device to a workbench or the ground using M10 bolts. The center-to-center distance between the mounting holes 4 is 750 mm x 550 mm. A signal processing module 19 is integrated into the internal area of ​​the base plate 2. The signal processing module 19 is connected to a wiring port at the bottom of the support column 3 via internal wiring. The wiring port uses an aviation plug structure, such as an 8-pin M12 aviation plug, to ensure the stability and reliability of signal transmission.

[0022] The supporting column 3 is a hollow rectangular column structure with a height of 1200 mm, a cross-sectional dimension of 100 mm x 100 mm, and a wall thickness of 4 mm. It is also made of high-strength aluminum alloy and has an anodized surface. The bottom of the supporting column 3 is fixedly connected to the center of the base plate 2 via four angle steel connectors and M8 bolts. The bolt spacing in the connection area is 70 mm, ensuring a strict perpendicular relationship between the supporting column 3 and the base plate 2, with a perpendicularity tolerance controlled within 0.1 mm. An internal cable channel is provided in the supporting column 3. The inner wall of the cable channel is covered with an electromagnetic shielding layer made of 0.5 mm thick copper foil or conductive cloth, designed to effectively block external electromagnetic interference and protect the weak signals transmitted internally. A control panel 20 is integrally installed in the center of the supporting column 3. The control panel 20 is 200 mm high and 150 mm wide, flush with the outer surface of the supporting column 3. The control panel 20 includes a display screen 21 and operation buttons 22. The display screen 21 is a 7-inch LCD touchscreen with a resolution of 800 x 480 pixels, used for real-time display of detection data and the operating interface. The operation buttons 22 are six circular, waterproof, sealed buttons, such as those covered with a silicone film, providing excellent dust and water resistance and ensuring reliable operation in industrial environments. The control panel 20 is connected to the signal processing module 19 via an internal shielded cable. This shielded cable uses a multi-strand copper wire structure with a braided shielding layer, further enhancing the anti-interference capability of signal transmission.

[0023] Please see Figure 1 and Figure 2 The air duct adapter unit 5 is responsible for achieving a tight connection between the device and the heat dissipation air duct of the welding machine. Its main structure includes an adjustable sealing ring 6, multiple radial telescopic rods 7, and a sealing airbag 8. The air duct adapter unit 5 is mounted on the top of the support column 3 via a rotating bracket 9. The rotating bracket 9 has an L-shaped structure, with its horizontal arm fixedly connected to the top of the support column 3 and a bearing seat at the end of its vertical arm. The bearing seat contains a ball bearing, which allows the adjustable sealing ring 6 to rotate horizontally from 0 to 360 degrees to align with the welding machine air duct openings in different directions. The rotating bracket 9 is made of high-strength carbon steel and chrome-plated for rust prevention.

[0024] The adjustable sealing ring 6 consists of two symmetrical semi-annular shells 23. Each semi-annular shell 23 has a C-shaped structure with an outer diameter of 300 mm, an inner diameter of 200 mm, and a thickness of 50 mm. It is injection molded from high-strength engineering plastics such as nylon 66. The two semi-annular shells 23 are connected by four quick-locking latches 24, such as spring-loaded push-button latches. The quick-locking latches 24 are evenly distributed around the circumference of the semi-annular shells, allowing for quick assembly and disassembly of the semi-annular shells 23 by pressing, facilitating adaptation to air ducts of different sizes. The inner ring surface of the adjustable sealing ring 6 has an annular groove 10 with a depth of 6 mm and a width of 10 mm. A sealing strip 25 is embedded in the annular groove 10. The sealing strip 25 is made of highly elastic and wear-resistant EPDM rubber material and has a D-shaped cross-section structure. Its outer diameter precisely matches the size of the annular groove 10. The sealing strip 25 provides good airtightness when in contact with the air duct opening of the welding machine. The combined structure of the annular groove 10 and the sealing strip 25 can provide a certain degree of flexible deformation to achieve effective sealing when the adjustable sealing ring 6 does not completely match the welding machine air duct opening.

[0025] Multiple radial telescopic rods 7 are evenly distributed circumferentially along the adjustable sealing ring 6, for example, eight radial telescopic rods 7 are equidistantly distributed to provide uniform support and pushing force. Each radial telescopic rod 7 includes an outer sleeve 26, an inner rod 27, and a locking screw 28. The outer sleeve 26 is cylindrical with an outer diameter of 15 mm and a length of 150 mm, made of stainless steel, and has a graduated scale on its outer wall with a graduation accuracy of 1 mm for precise adjustment of the telescopic length. The inner rod 27 is a solid round rod with an outer diameter of 12 mm and a length of 120 mm, also made of stainless steel. The inner rod 27 and the outer sleeve 26 are fitted with a clearance fit with a clearance fit tolerance of H7 / g6 to ensure smooth sliding during telescopic movement. The locking screw 28 is an M5 hand-tightening screw with a nylon locking head at its end. The locking screw 28 is screwed into a threaded hole on the side wall of the outer sleeve 26. When tightened, the nylon locking head contacts the surface of the inner insert rod 27, and the inner insert rod 27 is positioned and locked within the outer sleeve 26 through friction. The inner end of the radial telescopic rod 7 is equipped with a guide roller 11. The guide roller 11 is made of wear-resistant polyurethane material with a diameter of 20 mm and is mounted on the inner end of the inner insert rod 27 via a stainless steel bearing. The function of the guide roller 11 is to reduce friction with the sealing airbag 8 when adjusting the length of the radial telescopic rod 7 and to guide the expansion or contraction of the sealing airbag 8. The outer end of the radial telescopic rod 7 is connected to the external skeleton structure of the sealing airbag 8 via a flange connection or threaded connection, ensuring a secure fixation between the two and transmitting the radial thrust of the radial telescopic rod 7 to the sealing airbag 8.

[0026] The sealing airbag 8 has an annular structure with an outer diameter of 250 mm, an inner diameter of 180 mm, and a height of 50 mm. It is made of highly elastic, wear-resistant silicone rubber with a wall thickness of 2.5 mm, exhibiting good flexibility and sealing performance. A pressure sensing layer 12 is provided on the inner surface of the sealing airbag 8. This layer consists of multiple miniature pressure sensors, such as 12 piezoresistive pressure sensors evenly distributed along the circumference of the sealing airbag 8. Each pressure sensor has a range of 0 to 100 kPa and an accuracy of 0.5%FS. The pressure sensing layer 12 is used to monitor the inflation pressure inside the sealing airbag 8 in real time, as well as the local pressure distribution when the sealing airbag 8 contacts the welding machine duct opening, thereby evaluating the uniformity and reliability of the sealing effect. An inflation valve is located inside the sealing airbag 8, which is inflated by an external air pump to expand and tightly seal against the welding machine duct opening, forming an airtight connection. The pressure sensing layer 12 is connected to the signal processing module 19 via internal wires.

[0027] Please see Figure 1 and Figure 3 The airflow monitoring unit 13 is responsible for the precise measurement of airflow parameters inside the duct. Its main structure includes a measuring conduit 14, a wind speed sensor array 15, and a temperature sensor group 16. The measuring conduit 14 passes through the central hole of the adjustable sealing ring 6 and is tightly fixed to the central hole of the adjustable sealing ring 6 via an internal flange and sealing gasket, ensuring stable positioning and no air leakage. The measuring conduit 14 is made of transparent polycarbonate material, with an outer diameter of 150 mm, an inner diameter of 140 mm, and a length of 400 mm, exhibiting good light transmittance and impact resistance. The inner wall of the measuring conduit 14 is coated with an anti-reflective coating, which is made of nano-sized silica or titanium dioxide film, designed to reduce light reflection in the airflow and ensure the accuracy of internal sensor measurements. An inlet rectifier 17 and an outlet diffuser 18 are respectively located at both ends of the measuring conduit 14. The inlet shroud 17 has a streamlined, converging structure. Its larger opening connects to the inlet end of the measuring duct 14, while its smaller opening has an inner diameter of 100 mm. This design smoothly converges the incoming airflow, reducing turbulence and improving airflow uniformity. The outlet diffuser 18 has a conical, expanding structure. Its smaller opening connects to the outlet end of the measuring duct 14, while its larger opening has a diameter of 200 mm. This design smoothly diffuses the measured airflow out, reducing disturbance to downstream airflow. Both the inlet shroud 17 and the outlet diffuser 18 are injection molded from ABS engineering plastic.

[0028] The wind speed sensor array 15 consists of multiple hot-wire anemometers 29, for example, six hot-wire anemometers 29 are equidistantly distributed along the axial direction of the measuring conduit 14. Each hot-wire anemometer 29 is fixed to the central axis of the measuring conduit 14 by a support rod. The support rod has an airfoil cross-section with a chord length of 5 mm and a thickness of 1 mm, and is made of 316L stainless steel to minimize disturbance to the airflow. The hot-wire anemometer 29 has a measurement range of 0.1 to 50 m / s and an accuracy of 2%FS. The axial spacing between the hot-wire anemometers 29 is 70 mm to provide multi-point wind speed data along the airflow direction. The measuring end of each hot-wire anemometer 29 is in direct contact with the airflow, converts the wind speed signal into an electrical signal through its internal circuitry, and connects it to the signal processing module 19 via an internal shielded wire.

[0029] The temperature sensor group 16 includes multiple platinum resistance temperature probes 30, such as eight Pt100 type platinum resistance temperature probes 30. The platinum resistance temperature probes 30 are staggered on the inner wall of the measuring conduit 14, with optimized distribution along the axial and circumferential directions of the measuring conduit, for example, spaced 45 degrees circumferentially and arranged in two staggered layers axially. Each platinum resistance temperature probe 30 is fixed to the inner wall of the measuring conduit 14 by a mounting base made of thermally conductive ceramic material, such as alumina ceramic, which has good insulation and thermal conductivity, ensuring temperature measurement accuracy while minimizing the impact on airflow. The measurement range of the platinum resistance temperature probes 30 is from -50 degrees Celsius to 200 degrees Celsius, with an accuracy of ±0.2 degrees Celsius. Each platinum resistance temperature probe 30 is installed at a 35-degree angle, with its measuring end partially extending into the airflow while the main body remains in close contact with the inner wall of the conduit, to simultaneously monitor both the airflow temperature and the conduit wall temperature. This installation angle is designed to optimize the measurement response speed. The platinum resistance temperature probe 30 is connected to the signal processing module 19 via internal wires.

[0030] The signal processing module 19 is housed inside the base plate 2 and fixed to a mounting base below the base plate 2 by high-strength stainless steel bolts. The signal processing module 19 includes an analog-to-digital converter (ADC) unit, a data processing unit, and a data storage unit. The ADC unit has a sampling frequency of 12 kHz and uses a 16-bit high-precision ADC chip to convert analog signals from the pressure sensing layer 12, the hot-wire anemometer 29, and the platinum resistance temperature probe 30 into digital signals. The data processing unit uses a 32-bit high-performance microprocessor, such as an ARM Cortex-M4 series chip, with a main frequency of 200 MHz, responsible for real-time processing, filtering, averaging, and calculation of the acquired digital signals, and executing various data analysis algorithms. The data storage unit includes a 16GB embedded eMMC flash memory module for storing raw data, processing results, and system logs. The data storage unit also includes an SD card slot for easy external data export. The signal processing module 19 is connected to the control panel 20 via an internal shielded cable. The shielded cable uses a multi-strand copper wire with a braided shielding layer structure to ensure interference resistance during signal transmission.

[0031] This utility model's welding machine heat dissipation duct testing device, through the detailed structural design described above, forms a complete welding machine heat dissipation duct performance evaluation system with excellent adaptability, accuracy, and ease of operation. The testing base 1 provides stable physical support through the base plate 2 and supporting column 3, and integrates signal processing and control interfaces. The coordinated cooperation of the adjustable sealing ring 6, radial telescopic rod 7, and sealing airbag 8 in the duct adaptation unit 5, especially the quick-lock 24 of the semi-annular shell 23, the sealing strip 25 in the annular groove 10, and the locking screw 28 and scale of the radial telescopic rod 7, enables the device to quickly and accurately adapt to welding machine duct openings of various diameters and shapes, and achieve reliable sealing connections. The pressure sensing layer 12 inside the sealing airbag 8 provides real-time sealing status feedback. The pressure sensing layer 12 is composed of multiple evenly distributed miniature pressure sensors, ensuring the monitoring of sealing uniformity. The measuring duct 14 in the airflow monitoring unit 13 is made of transparent polycarbonate material with an anti-reflective coating. Its integrated internal components—a hot-wire anemometer 29 in the wind speed sensor array 15 and a platinum resistance temperature probe 30 in the temperature sensor group 16—achieve precise, low-disturbance measurement of airflow velocity and temperature within the duct through a carefully designed support rod airfoil cross-section and installation angle. The streamlined structure of the inlet rectifier 17 and the outlet diffuser 18 further optimizes the stability of airflow passing through the measurement area. The analog-to-digital conversion unit, data processing unit, and data storage unit in the signal processing module 19 ensure efficient and accurate data acquisition, processing, and storage. The LCD touchscreen display 21 and waterproof, sealed operation buttons 22 in the control panel 20 provide an intuitive and convenient human-machine interface. The electromagnetic shielded cable channel inside the support column 3 and the bottom aviation plug connection port ensure the purity of the system signal and the reliability of the connection. The synergistic effect of these structural features enables this device to achieve non-invasive, high-precision performance testing of the heat dissipation duct of welding machines, significantly improving the efficiency and accuracy of testing, and providing reliable technical support and data for the design optimization, fault diagnosis and maintenance of welding machine heat dissipation systems.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for detecting the heat dissipation duct of an electric welding machine, comprising: The detection base (1), the air duct adapter unit (5), and the airflow monitoring unit (13) are characterized in that the detection base (1) includes a base plate (2) and a support column (3) vertically arranged on the base plate (2), and the base plate (2) is provided with a plurality of mounting and positioning holes (4); the air duct adapter unit (5) includes an adjustable sealing ring (6), a plurality of radial telescopic rods (7), and a sealing airbag (8), and the adjustable sealing ring (6) is installed on the support column via a rotating bracket (9). At the top of the column (3), the inner ring surface of the adjustable sealing ring (6) is provided with an annular groove (10). Multiple radial telescopic rods (7) are evenly distributed around the adjustable sealing ring (6). The inner end of each radial telescopic rod (7) is provided with a guide roller (11), and the outer end is connected to the sealing airbag (8). The sealing airbag (8) has an annular bladder structure, and its inner surface is provided with a pressure sensing layer (12). The airflow monitoring unit (13) includes a measuring conduit (14) and a wind speed sensor array. The measuring conduit (14) is connected to the pressure sensing layer (12), the hot wire anemometer (29), and the platinum resistance temperature probe (30) via data cables. The measuring conduit (14) passes through the center hole of the adjustable sealing ring (6) and has an inlet rectifier (17) and an outlet diffuser (18) at its two ends. The wind speed sensor array (15) consists of multiple hot wire anemometers (29), which are equidistantly distributed along the axial direction of the measuring conduit (14). The temperature sensor group (16) includes multiple platinum resistance temperature probes (30), which are staggered on the inner wall of the measuring conduit (14). The detection base (1) also includes a signal processing module (19) installed inside the base plate (2). The signal processing module (19) is connected to the pressure sensing layer (12), the hot wire anemometer (29), and the platinum resistance temperature probe (30) via data cables. The support column (3) has a control panel (20) in the middle, which has a display screen (21) and operation buttons (22).

2. The welding machine heat dissipation duct detection device according to claim 1, characterized in that, The adjustable sealing ring (6) consists of two semi-annular shells (23), which are connected by a quick-lock (24); the radial telescopic rod (7) includes an outer tube (26), an inner rod (27), and a locking screw (28); the sealing airbag (8) is made of silicone rubber material and has a wall thickness of two to three millimeters.

3. The electric welding machine heat dissipation duct detection device according to claim 1 or 2, characterized in that, The measuring conduit (14) is made of transparent polycarbonate material and has an anti-reflective coating on its inner wall; the inlet shroud (17) has a streamlined contraction structure and the outlet diffuser (18) has a conical expansion structure; the hot wire anemometer (29) is fixed to the central axis of the measuring conduit (14) by a support rod and the spacing between each hot wire anemometer (29) is fifty to eighty millimeters.

4. The electric welding machine heat dissipation duct detection device according to claim 1, characterized in that, The platinum resistance temperature probe (30) is fixed to the inner wall of the measuring conduit (14) by a mounting base, and the installation angle of each platinum resistance temperature probe (30) is 30 to 45 degrees; the pressure sensing layer (12) is composed of multiple miniature pressure sensors, and each miniature pressure sensor is evenly distributed along the circumference of the sealing airbag (8).

5. The electric welding machine heat dissipation duct detection device according to claim 1, characterized in that, The signal processing module (19) includes an analog-to-digital conversion unit, a data processing unit, and a data storage unit; the sampling frequency of the analog-to-digital conversion unit is 10 kHz, and the data processing unit uses a 32-bit microprocessor; the display screen (21) of the control panel (20) is an LCD touch screen, and the operation buttons (22) adopt a waterproof and sealed structure.

6. The electric welding machine heat dissipation air duct detection device according to claim 1, characterized in that, The support column (3) has a cable channel inside, and the inner wall of the cable channel has an electromagnetic shielding layer; the bottom of the support column (3) has a wiring port, and the wiring port adopts an aviation plug structure.

7. The electric welding machine heat dissipation air duct detection device according to claim 2, characterized in that, The inner ring surface of the semi-annular shell (23) has an annular groove (10) with a depth of five to eight millimeters, and a sealing strip (25) is embedded in the annular groove (10); the outer wall of the outer sleeve (26) is provided with a scale, the inner insert rod (27) and the outer sleeve (26) are fitted with a clearance, and the end of the locking screw (28) is provided with a nylon locking head.

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