Process for manufacturing a radiator pipe of an automobile water tank

By integrating testing and cleaning equipment with a heat pipe fixing fixture, the problems of inconvenient heat pipe fixing and deformation were solved, enabling rapid and effective sealing testing and cleaning, and improving the testing results.

CN116690131BActive Publication Date: 2026-04-10HUBEI JUNYU SPECIAL PURPOSE VEHICLE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUBEI JUNYU SPECIAL PURPOSE VEHICLE CO LTD
Filing Date
2023-05-18
Publication Date
2026-04-10

AI Technical Summary

Technical Problem

Existing automotive radiator pipe testing devices are inconvenient to operate during the fixing process, which can easily lead to pipe deformation and cause compression of the pipe during connection.

Method used

The system employs a heat dissipation pipe fixing fixture and integrated testing equipment. The heat dissipation pipe is transported by a conveyor belt, and debris is removed using an air nozzle. The system utilizes an expansion airbag and ball bearings to achieve automatic positioning and sealing of the pipes. Combined with air pressure testing and cleaning, it enables rapid and effective sealing testing.

Benefits of technology

It enables rapid fixing and inspection of heat dissipation pipes, prevents pipe deformation, improves inspection results, and enhances sealing and prevents external interference through airflow recycling for cleaning.

✦ Generated by Eureka AI based on patent content.

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    Figure CN116690131B_ABST
Patent Text Reader

Abstract

The application discloses a kind of automobile water tank radiating pipe pipe manufacturing process, comprising the following steps: step one, die casting forming;Step two, radiating fin preparation, welding forming, the weld of radiating pipe that is well welded is handled, the present application relates to radiating pipe pipe manufacturing technical field.This kind of automobile water tank radiating pipe pipe manufacturing process, by integrating detection equipment and cleaning equipment together, radiating pipe can be detected quickly, and airflow during detection can be recycled to clean radiating pipe, not only can automatically position radiating pipe and connect, and sealing effect is good, can effectively prevent interference caused by external factors to detection, and detection effect is better.
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Description

Technical Field

[0001] This invention relates to the field of heat dissipation pipe technology, specifically a process for a heat dissipation pipe for an automotive water tank. Background Technology

[0002] A car radiator, also known as a water tank, is a major component of a car's cooling system. Its function is to dissipate heat. Coolant absorbs heat in the water jacket, flows to the radiator where the heat is dissipated, and then returns to the water jacket for further circulation, thus regulating temperature. It is an integral part of the car engine, and the radiator is a crucial component of water-cooled engines. As an important part of the cooling circuit of a water-cooled engine, it absorbs heat from the cylinder block, preventing the engine from overheating. Because water has a high specific heat capacity, its temperature rise after absorbing heat from the cylinder block is not significant. Therefore, the engine's heat is dissipated through the coolant liquid circuit, using water as a heat carrier for heat conduction, and then through large-area heat sinks for convection, maintaining the engine at a suitable operating temperature. Car radiators require the use of radiator pipes during operation, and the sealing performance of these pipes needs to be tested during manufacturing.

[0003] According to the automotive water tank radiator pipe sealing test device described in patent number CN214096526U, the pipe is difficult to fix during use, cannot be fixed quickly, and is prone to squeezing during connection, resulting in pipe deformation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a process for manufacturing automotive water tank cooling pipes, which solves the aforementioned problems.

[0005] To achieve the above objectives, the present invention provides a process for a car radiator cooling pipe, comprising the following steps:

[0006] Step 1: Die casting;

[0007] Step 2: Heat sink preparation, welding and forming, and treatment of the weld seams after the heat sink pipes are installed;

[0008] Step 3: Secure the heat dissipation pipes using the heat dissipation pipe fixing fixture, and then transport them via the conveyor belt of the cleaning equipment;

[0009] Step 4: The heat dissipation pipe fixing fixture is transported by conveyor belt and cleaned.

[0010] Step 5: The conveyor belt transports the heat sink fixing fixture to the groove on the worktable of the testing equipment. The heat sink fixing fixture falls into the groove and connects. After connection, the test is performed.

[0011] As a further scheme of the present application: in step one, when the heat dissipation pipe is fixed by the heat dissipation pipe fixing tool, the heat dissipation pipe is placed in the inner groove on the surface of the heat dissipation pipe fixing tool, at this time the heat dissipation pipe is recessed therein, and then the two ends of the water inlet and the water outlet extend out of the through groove, and the heat dissipation pipe is fixed.

[0012] As a further scheme of the present application: in step four, when cleaning, high-pressure air is blown out by the air blowing nozzle on the surface of the heat dissipation pipe during conveying, and the adhered debris on the surface is blown away.

[0013] As a further scheme of the present application: one end of the air blowing nozzle is communicated with the air outlet pipeline, the air outlet pipeline supplies air to the air blowing nozzle to blow and clean the surface of the heat dissipation pipe.

[0014] As a further scheme of the present application: in step five, when connecting, the driving cylinder is started to extrude the heat dissipation pipe through the connecting assembly, the other end of the heat dissipation pipe is pushed to the connecting assembly on the other side, the connection is performed, the two ends of the heat dissipation pipe are inserted into the connecting pipeline, at this time the inflatable air bag is supplied with air by the external air source, the inflatable air bag is inflated to push the sliding sleeve to slide on the guide rail, the top rod extends into the limiting sleeve to extrude the ball, the ball is limited in the inclined guide groove to move towards the axis of the connecting pipeline, at this time a plurality of balls move towards the middle to extrude the elastic sealing section, and the elastic sealing section is extruded and attached to the surface of the heat dissipation pipe to seal.

[0015] As a further scheme of the present application: in step six, when side viewing, the heat dissipation pipe is blown by the fan, at this time the switch valve is closed, the air pressure assembly of the air outlet pipeline detects the pressure resistance sealing of the heat dissipation pipe, after the detection is completed without error, the switch valve is opened, at this time the high-pressure gas is sprayed from the air outlet pipeline, one end of the air outlet pipeline is communicated with the air blowing nozzle, the air outlet pipeline supplies air to the air blowing nozzle to blow and clean the surface of the heat dissipation pipe, and then the driving cylinder is reset to take out the heat dissipation pipe fixing tool for the next test.

[0016] The cleaning device comprises a conveying belt, a surface of the conveying belt is provided with a blowing nozzle facing the surface of the conveying belt, the heat dissipation pipe fixing tool is conveyed by the conveying belt, and high-pressure air is blown out to the surface of the heat dissipation pipe by the blowing nozzle during conveying, so that the adhered debris on the surface is blown away, and the surface is cleaned. The surface of the conveying belt is drivingly connected with the heat dissipation pipe fixing tool, an inner cavity of the heat dissipation pipe fixing tool is provided with an inner groove for mounting the heat dissipation pipe, and both sides of the heat dissipation pipe fixing tool are provided with penetrating grooves matched with the surface of the heat dissipation pipe. The heat dissipation pipe is placed in the inner groove on the surface of the heat dissipation pipe fixing tool, and then the two end water inlets and outlets protrude from the penetrating grooves. At this time, the heat dissipation pipe is fixed, and then the heat dissipation pipe fixing tool is conveyed by the conveying belt. The detection device comprises a workbench arranged on one side of the conveying belt, a fan and a driving cylinder are fixedly connected to the surface of the workbench, respectively, and a groove matched with the heat dissipation pipe fixing tool is arranged on the surface of the workbench. The conveying belt conveys the heat dissipation pipe fixing tool into the groove on the workbench. The surface of the workbench is provided with two left-right symmetrical communication assemblies in communication with the water inlets and outlets of the heat dissipation pipe. The communication assembly comprises a communication pipeline and a horn arranged on one side of the communication pipeline. The horn is designed to facilitate the connection of the heat dissipation pipe. The heat dissipation pipe can be inserted into the communication pipeline along the horn. A resilient sealing section is arranged in the middle of the communication pipeline. The surface of the resilient sealing section is in abutment with the heat dissipation pipe. A support plate, a guide rail and a limiting sleeve are fixed to the surface of the communication pipeline in sequence from far to near, away from the heat dissipation pipe. A sliding sleeve is slidingly connected to the surface of the guide rail. A top rod is fixedly connected to one side of the sliding sleeve. A plurality of rolling balls are movably arranged in the inner cavity of the limiting sleeve. The surface of the rolling balls is in abutment with the surface of the resilient sealing section. An inclined guide groove is arranged in the inner cavity of the limiting sleeve. An inflatable air bag is arranged between the support plate and the sliding sleeve on the surface of the communication pipeline. One end of the inflatable air bag is fixedly connected to one side of the support plate. The other end of the inflatable air bag is fixedly connected to one side of the sliding sleeve. The inflatable air bag is in communication with an external air source through a gas guide pipeline for inflation and deflation. In use, the two ends of the heat dissipation pipe are inserted into the communication pipeline. At this time, the inflatable air bag is supplied with air by the external air source. The inflatable air bag expands to drive the sliding sleeve to slide on the guide rail. The top rod extends into the limiting sleeve to press the rolling balls. The rolling balls are limited in the inclined guide groove and move towards the shaft of the communication pipeline. At this time, a plurality of rolling balls move towards the middle to press the resilient sealing section, so that the resilient sealing section is pressed and attached to the surface of the heat dissipation pipe for sealing. The left communication assembly is in communication with the fan, and the right communication assembly is fixedly connected to the piston end of the driving cylinder. The heat dissipation pipe fixing tool falls into the inner groove. At this time, the driving cylinder is started to press the heat dissipation pipe through the communication assembly, so that the other end of the heat dissipation pipe is pushed to the right communication assembly for communication. One end of the communication pipeline of the right communication assembly is communicated with an air outlet pipeline. The air outlet pipeline is in communication with an external air pressure assembly detection assembly.The surface of the air outlet pipe is equipped with a switch valve. After connection, a fan blows air onto the heat dissipation pipe. At this time, the switch valve is closed, and the pressure resistance and seal of the heat dissipation pipe are tested using the air pressure assembly of the air outlet pipe. After the test is successful, the switch valve is opened, and high-pressure gas is ejected from the air outlet pipe. One end of the air outlet pipe is connected to an air nozzle, which supplies air to the nozzle to clean the surface of the heat dissipation pipe. Then, the cylinder is driven to reset, and the heat dissipation pipe fixture is removed for the next test.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. This invention integrates the testing equipment and the cleaning equipment, enabling rapid testing of the heat sink. The airflow during testing can be recycled to clean the heat sink. It can automatically position and connect the heat sink, and has a good sealing effect, effectively preventing interference from external factors and improving the testing results. Furthermore, the heat sink fixing fixture provides effective support for the heat sink, preventing deformation.

[0019] 2. In this invention, the heat dissipation pipe is placed in the inner groove of the heat dissipation pipe fixing fixture surface. At this time, the heat dissipation pipe is recessed into it, and then the water inlet and outlet at both ends extend out from the through groove, and the heat dissipation pipe is fixed, which can quickly fix the heat dissipation pipe. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the cleaning and testing equipment of the present invention;

[0021] Figure 2 For the present invention Figure 1 A magnified view of a section at point A in the middle;

[0022] Figure 3 For the present invention Figure 1 A magnified view of a section at point B in the middle;

[0023] Figure 4 This is a schematic diagram of the heat dissipation pipe fixing fixture of the present invention.

[0024] In the diagram: 1. Workbench; 2. Conveyor belt; 3. Fan; 4. Heat dissipation pipe fixing fixture; 5. Inner groove; 6. Through groove; 7. Heat dissipation pipe; 8. Connecting pipe; 9. Support plate; 10. Guide rail; 11. Sliding sleeve; 13. Inflatable airbag; 14. Air guide pipe; 15. Top rod; 16. Limit sleeve; 17. Inclined guide groove; 18. Ball bearing; 19. Elastic sealing section; 20. Trumpet mouth; 21. Air outlet pipe; 22. Switch valve; 23. Drive cylinder; 24. Air nozzle. Detailed Implementation

[0025] In order to further illustrate the technical means and effects taken by the present application to achieve the predetermined object of the present application, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0026] Please refer to Figures 1-4 The present application provides a technical solution: a process for manufacturing a radiator pipe for an automobile water tank, comprising the following steps:

[0027] Step one, die casting;

[0028] Step two, preparation of the radiating fins, welding and forming, and processing the welds of the radiating pipe 7;

[0029] Step three, placing the radiating pipe 7 in the inner recess 5 on the surface of the radiating pipe fixing tool 4, at this time the radiating pipe 7 is recessed therein, then the two ends of the water inlet and outlet extend out of the through groove 6, the radiating pipe 7 is fixed, and then it is conveyed through the conveying belt 2 of the cleaning equipment;

[0030] Step four, conveying the radiating pipe fixing tool 4 through the conveying belt 2, and blowing high-pressure air out of the surface of the radiating pipe 7 through the air blowing nozzle 24 to blow away the debris adhered to the surface and clean it;

[0031] Step five, the conveying belt 2 transports the heat pipe fixing tool 4 to the groove on the detection equipment workbench 1, the heat pipe fixing tool 4 falls into the inner groove 5, at this time the driving cylinder 23 starts to extrude the heat pipe 7 through the communication assembly, pushes the other end of the heat pipe 7 to the communication assembly on the other side, communicates, and inserts the heat pipe 7 into the communication pipeline 8, at this time the inflation air bag 13 is supplied with air through the external air source, the inflation air bag 13 expands to drive the sliding sleeve 11 to slide on the guide rail 10, the top rod 15 extends into the limiting sleeve 16 to extrude the ball 18, the ball 18 is limited below the inclined guide groove 17 and moves towards the axis of the communication pipeline 8, at this time a plurality of balls 18 move towards the middle to extrude the elastic sealing section 19, and the elastic sealing section 19 is extruded and attached to the surface of the heat pipe 7 for sealing, after communication, the heat pipe 7 is blown out by the fan 3, at this time the on-off valve 22 is closed, the heat pipe 7 is detected by the air pressure assembly of the air outlet pipeline 21, after the detection is correct, the on-off valve 22 is opened, at this time the high-pressure gas is sprayed from the air outlet pipeline 21, one end of the air outlet pipeline 21 is communicated with the air blowing nozzle 24, the air outlet pipeline 21 supplies air to the air blowing nozzle 24 to blow the surface of the heat pipe 7, and then the driving cylinder 23 is reset to take out the heat pipe fixing tool 4 for the next test. By integrating the detection equipment and the cleaning equipment, the heat pipe 7 can be quickly detected, the airflow during detection can be recycled to clean the heat pipe 7, the heat pipe 7 can be automatically positioned and connected, the sealing effect is good, external factors can be effectively prevented from interfering with the detection, and the detection effect is better.

[0032] In step one, the heat pipe 7 is fixed by the heat pipe fixing tool 4, the heat pipe is placed in the inner groove 5 on the surface of the heat pipe fixing tool 4, then the inlet and outlet of the heat pipe 7 are stretched out from the through groove 6, and the heat pipe 7 is fixed.

[0033] In step four, the surface of the heat pipe 7 is blown with high-pressure air by the air blowing nozzle 24 during conveying to blow away the adhered debris.

[0034] One end of the air blowing nozzle 24 is communicated with the air outlet pipeline 21, and the air outlet pipeline 21 supplies air to the air blowing nozzle 24 to blow and clean the surface of the heat pipe 7.

[0035] When the communication is carried out in the fifth step, the driving cylinder 23 starts to extrude the heat dissipation pipe 7 through the communication assembly, pushes the other end of the heat dissipation pipe 7 to the communication assembly on the other side, carries out the communication, and inserts the heat dissipation pipe 7 into the communication pipeline 8. At this time, the inflation air bag 13 is supplied with air through the external air source, the inflation air bag 13 is inflated to push the sliding sleeve 11 to slide on the guide rail 10, the top rod 15 extends into the limiting sleeve 16, extrudes the ball 18, and the ball 18 is limited in the inclined guide groove 17 to move towards the axis of the communication pipeline 8. At this time, the plurality of balls 18 simultaneously move towards the middle to extrude the elastic sealing section 19, extrude the elastic sealing section 19 to adhere to the surface of the heat dissipation pipe 7 for sealing.

[0036] When the side view is carried out in the sixth step, the fan 3 blows air to the heat dissipation pipe 7. At this time, the switch valve 22 is closed, the air pressure assembly of the air outlet pipeline 21 detects the pressure sealing of the heat dissipation pipe 7, opens the switch valve 22 after the detection is correct, the high-pressure gas is sprayed from the air outlet pipeline 21, one end of the air outlet pipeline 21 is communicated with the air blowing nozzle 24, the air outlet pipeline 21 supplies air to the air blowing nozzle 24 to blow and clean the surface of the heat dissipation pipe 7, and then the driving cylinder 23 is reset to take out the heat dissipation pipe fixing tool 4 for the next test.

[0037] The cleaning device comprises a conveying belt 2, the surface of the conveying belt 2 is provided with air blow nozzles 24 facing the surface of the conveying belt 2, the heat dissipation pipe fixing tool 4 is conveyed by the conveying belt 2, and high-pressure air is blown out to the surface of the heat dissipation pipe 7 by the air blow nozzles 24 during conveying, so that the surface adhered debris is blown away, cleaning is conducted, the surface of the conveying belt 2 is drivingly connected with the heat dissipation pipe fixing tool 4, the inner cavity of the heat dissipation pipe fixing tool 4 is provided with an inner groove 5 for mounting the heat dissipation pipe 7, and the two sides of the heat dissipation pipe fixing tool 4 are provided with penetrating grooves 6 matched with the surface of the heat dissipation pipe 7, the heat dissipation pipe 7 is placed in the inner groove 5 on the surface of the heat dissipation pipe fixing tool 4, at this time, the heat dissipation pipe 7 is recessed in the inner groove 5, and then the water inlets and outlets at two ends extend out of the penetrating grooves 6, at this time, the heat dissipation pipe 7 is fixed, and then is conveyed by the conveying belt 2, the detection device comprises a workbench 1 arranged on one side of the conveying belt 2, the surface of the workbench 1 is fixedly connected with a fan 3 and a driving cylinder 23 respectively, the surface of the workbench 1 is provided with a groove matched with the heat dissipation pipe fixing tool 4, the conveying belt 2 conveys the heat dissipation pipe fixing tool 4 into the groove on the workbench 1, the surface of the workbench 1 is provided with two left-right symmetrical communication assemblies in communication with the water inlets and outlets of the heat dissipation pipe 7 respectively, the communication assembly comprises a communication pipeline 8 and a horn mouth 20 arranged on one side of the communication pipeline 8, the horn mouth 20 is convenient for the connection of the heat dissipation pipe 7, the heat dissipation pipe 7 is guided to be inserted into the communication pipeline 8 through the design of the horn mouth 20, an elastic sealing section 19 is arranged in the middle of the communication pipeline 8, the surface of the elastic sealing section 19 abuts against the heat dissipation pipe 7, the surface of the communication pipeline 8 is sequentially fixed with a supporting plate 9, a guide rail 10 and a limiting sleeve 16 from far to near from the heat dissipation pipe 7, the surface of the guide rail 10 is slidingly connected with a sliding sleeve 11, one side of the sliding sleeve 11 is fixedly connected with a top rod 15, the inner cavity of the limiting sleeve 16 movably arranged with a ball 18, the surface of the ball 18 abuts against the surface of the elastic sealing section 19, the inner cavity of the limiting sleeve 16 is provided with an inclined guide groove 17, the surface of the communication pipeline 8 is sleeved with an expansion air bag 13 between the supporting plate 9 and the sliding sleeve 11, one end of the expansion air bag 13 is fixedly connected with one side of the supporting plate 9, the other end of the expansion air bag 13 is fixedly connected with one side of the sliding sleeve 11, the expansion air bag 13 is in communication with an external gas source through a gas guide pipeline 14, and is inflated and deflated, in use, the heat dissipation pipe 7 is inserted into the communication pipeline 8 at two ends, at this time, the expansion air bag 13 is supplied with air by the external gas source, the expansion air bag 13 expands to drive the sliding sleeve 11 to slide on the guide rail 10, the top rod 15 extends into the limiting sleeve 16 to press the ball 18, the ball 18 moves towards the shaft center of the communication pipeline 8 under the limitation of the inclined guide groove 17, at this time, a plurality of balls 18 simultaneously move towards the middle to press the elastic sealing section 19, the elastic sealing section 19 is pressed and attached to the surface of the heat dissipation pipe 7 to be sealed, the left communication assembly is in communication with the fan 3, the right communication assembly is fixedly connected with the piston end of the driving cylinder 23, the heat dissipation pipe fixing tool 4 falls into the inner grooves 5,At this time, the driving cylinder 23 starts to extrude the heat dissipation pipe 7 through the communication assembly, and pushes the other end of the heat dissipation pipe 7 to the communication assembly on the other side, so as to communicate. One end of the communication pipeline 8 of the right communication assembly is communicated with the air outlet pipeline 21, the air outlet pipeline 21 is communicated with the external air pressure assembly detection assembly, the surface of the air outlet pipeline 21 is provided with a switch valve 22, and after communication, the heat dissipation pipe 7 is blown out by the fan 3. At this time, the switch valve 22 is closed, the air pressure assembly of the air outlet pipeline 21 detects the pressure sealing of the heat dissipation pipe 7, and after the detection is completed without error, the switch valve 22 is opened. At this time, high-pressure gas is sprayed from the air outlet pipeline 21, one end of the air outlet pipeline 21 is communicated with the air blowing nozzle 24, the air outlet pipeline 21 supplies air to the air blowing nozzle 24 to blow and clean the surface of the heat dissipation pipe 7, and then the driving cylinder 23 is reset. The heat dissipation pipe fixing tool 4 is taken out for the next test.

[0038] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as the above preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, equivalent change and modification of the above embodiment according to the technical essence of the present application, as long as it does not deviate from the technical solution of the present application, still belongs to the scope of the technical solution of the present application.

Claims

1. A process for the manufacture of a radiator pipe of an automobile water tank, characterized by: It comprises the following steps: Step one, die casting; Step two, fin preparation, welding, and processing the weld of the welded fin pipe (7); Step three, the fin pipe (7) is fixed by the fin pipe fixing tool (4), and then conveyed by the conveying belt (2) of the cleaning equipment; Step four, the fin pipe fixing tool (4) is conveyed by the conveying belt (2) and cleaned; Step five, the fin pipe fixing tool (4) is conveyed by the conveying belt (2) into the groove on the detection equipment workbench (1), the fin pipe fixing tool (4) falls into the inner groove (5) and is connected, and then tested; In step one, the fin pipe (7) is fixed by the fin pipe fixing tool (4), and the fin pipe is placed in the inner groove (5) on the surface of the fin pipe fixing tool (4), then the two ends of the fin pipe (7) are inserted into the through groove (6), and the fin pipe (7) is fixed; In step four, the surface of the fin pipe (7) is blown by the air nozzle (24) to blow away the debris adhered to the surface during conveying; One end of the air nozzle (24) is connected with the air outlet pipe (21), and the air outlet pipe (21) supplies air to the air nozzle (24) to blow the surface of the fin pipe (7); In step five, the driving cylinder (23) is started to extrude the fin pipe (7) through the connecting assembly, and the other end of the fin pipe (7) is pushed to the connecting assembly on the other side to be connected, and the two ends of the fin pipe (7) are inserted into the connecting pipe (8), and the inflatable air bag (13) is inflated by the external air source to drive the sliding sleeve (11) to slide on the guide rail (10), and the top rod (15) extends into the limiting sleeve (16) to extrude the ball (18), and the ball (18) moves towards the axis of the connecting pipe (8) under the limitation of the inclined guide groove (17), and the plurality of balls (18) simultaneously move towards the middle to extrude the elastic sealing section (19) and seal the surface of the fin pipe (7); In step five, the fin pipe (7) is blown by the fan (3), and the switch valve (22) is closed, and the air pressure assembly of the air outlet pipe (21) detects the pressure resistance and sealing of the fin pipe (7), and after the detection is completed without error, the switch valve (22) is opened, and the high-pressure gas is sprayed from the air outlet pipe (21), and one end of the air outlet pipe (21) is connected with the air nozzle (24), and the air outlet pipe (21) supplies air to the air nozzle (24) to blow the surface of the fin pipe (7).

Citation Information

Patent Citations

  • Device for detecting sealing performance of radiating pipe of automobile water tank

    CN214096526U

  • Automobile radiator cooling copper tube and production technology thereof

    CN107036477A

  • Automobile water tank radiating tube sealing performance detection device

    CN210571231U