Connecting pipeline leakage test method for computer cooling system

Abstract

The invention discloses a connecting pipeline leakage test method for a computer cooling system, and the method comprises the following steps: S1, sealing a connector at one end of a connecting pipeline through a flexible sealing part; s2, putting the connecting pipeline into the detection jig, and clamping and fixing the connecting pipeline through a positioning groove; then, driving the detection joint to be hermetically connected with the unsealed end of the connecting pipeline; s3, helium is injected into the containing cavity; s4, the detection device is started to vacuumize the interior of the connecting pipeline, then leakage detection testing is conducted on the interior of the connecting pipeline, whether helium permeates into the connecting pipeline or not is determined, and if helium is detected, the connecting pipeline is judged to be an unqualified product; if no helium is detected, judging that the product is a qualified product; s5, after detection is completed, the detection connector is driven to reset, and the detection connector is separated from the connecting pipeline. Helium detection is carried out through the negative pressure helium leak detection method, so that the detection sensitivity can be effectively improved, the detection accuracy can be improved, the usage amount of helium can be remarkably reduced, and the detection cost is reduced.

Description

[0001] This application claims priority to Chinese patent application No. 2025223839842, entitled "A Helium Detection Fixture for a Connecting Tube", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention belongs to the field of airtightness testing technology, specifically relating to a method for testing leakage in connecting pipes of a computer cooling system. Background Technology

[0003] As computer technology develops towards high computing power, high integration, and miniaturization, the power consumption and heat generation of core hardware such as CPUs, GPUs, and server chips are increasing exponentially. Traditional air-cooling systems can no longer meet the heat dissipation requirements under high loads. High-efficiency cooling systems such as liquid cooling (water cooling, phase change cooling, oil cooling) and high-pressure air cooling have become the mainstream heat dissipation solutions for high-end civilian computers, data center server clusters, and industrial control computers.

[0004] The core of a computer cooling system consists of a heat sink, a circulating pump, a radiator, connecting pipes, and coolant (deionized water, heat transfer oil, phase change medium, or high-pressure cooling gas). The connecting pipes are the core carriers of the coolant / cooling gas, responsible for the circulation of the medium between the heat sink and the radiator. Therefore, their airtightness directly determines the operational stability and hardware safety of the cooling system. Even a minor leak in the pipes can lead to coolant leakage and short circuits, loss of cooling medium causing heat dissipation failure, or allow outside air to enter, causing scaling and corrosion inside the pipes – all potentially fatal problems. Therefore, airtightness testing is an essential process step in the manufacturing process (before leaving the factory and before installation) for computer cooling system connecting pipes.

[0005] Traditional methods for testing the airtightness of connecting pipes typically employ the positive pressure helium leak detection method. This involves filling the connecting pipe with helium under high pressure and then detecting whether helium escapes from the outside of the pipe to determine its condition. However, this method often has the following drawbacks: 1. High pressure inside the connecting pipeline can easily cause plastic deformation of the connecting pipeline, damaging it. It may also cause the flexible seal to bulge and leak, thus affecting the accuracy of the test. 2. The helium inside the connecting pipe is difficult to be quickly and completely evacuated, so it cannot be fully recycled. This not only wastes helium, but also causes residual helium to interfere with the next workpiece inspection, affecting the accuracy and efficiency of the inspection.

[0006] In addition, existing devices for fixing connecting pipes are usually relatively simple and cannot be adapted to various specifications of connecting pipes. Moreover, the fixing effect is not stable enough, and the accuracy of the test results can be affected by the movement of the pipes during the testing process. Summary of the Invention

[0007] (1) Technical problems to be solved This invention discloses a method for testing leaks in connecting pipes of computer cooling systems, aiming to solve the problems of low accuracy and efficiency, as well as serious helium waste, in the existing technology of using positive pressure helium leak detection to test the airtightness of connecting pipes.

[0008] (2) Technical solution This invention discloses a method for testing leakage in connecting pipes of a computer cooling system, comprising the following steps: Step S1: Connectors are fixed at both ends of the connecting pipe, and one end of the connector is sealed with a flexible sealing element; Step S2: Place the connecting pipe into the testing fixture. The testing fixture has a receiving cavity and a testing connector. The receiving cavity has a positioning groove that matches the connecting pipe. Insert the connecting pipe into the positioning groove. The positioning groove also has a retaining groove that corresponds to the unsealed end of the connecting pipe and is used to restrict the axial movement of the connecting pipe. By driving the testing connector to move towards the connecting pipe, the unsealed end of the connecting pipe is sealed and connected to the testing connector. Step S3: An air inlet channel is provided inside the receiving cavity. One end of the air inlet channel is connected to the receiving cavity, and the other end is connected to an external helium source. Turn on the helium source to allow helium to be injected into the receiving cavity through the air inlet channel. Step S4: A detection device is connected to the detection connector. After injecting helium, the detection device is activated. The detection device will evacuate the inside of the connecting pipe to maintain a vacuum state. Then, a leak test is performed on the inside of the connecting pipe to confirm whether helium has seeped into the connecting pipe. If helium is detected, the connecting pipe is determined to be a defective product; if no helium is detected, the connecting pipe is determined to be a qualified product. Step S5: After the test is completed, drive the test connector to reset, so that the test connector is separated from the connecting pipe and the connecting pipe is removed.

[0009] Furthermore, in step S2, the connector head is provided with an annular protrusion, which abuts against the groove wall of the slot on both sides in the axial direction to fix the unsealed end of the connecting pipe.

[0010] Furthermore, the positioning groove is provided with a first sink and several second sinks. The sealed end of the connecting pipe is placed on the second sink according to its length, while the unsealed end of the connecting pipe is placed on the first sink.

[0011] Furthermore, a cover plate is rotatably connected above the receiving cavity, and the connecting pipe enters the receiving cavity through the opening and closing of the cover plate.

[0012] Furthermore, in step S3, the pressure inside the helium source is greater than or equal to 0.5 MPa, while the pressure at which the helium source injects helium into the containment cavity is 0.02 MPa.

[0013] Furthermore, the helium injection time is 5 seconds.

[0014] Furthermore, the air inlet channel has several air outlets located at the bottom of the positioning groove, so that when helium is injected, the helium is concentrated and dispersed around the connecting pipe.

[0015] Furthermore, the testing fixture also includes a driving component, which is a cylinder. The driving component is fixed on the testing fixture, and its output end is connected to the testing connector.

[0016] Furthermore, the detection connector is provided with a sealing gasket made of elastic rubber, which is used to buffer the movement of the detection connector by the cylinder and prevent the detection connector from being damaged by a rigid collision with the connector of the connecting pipe.

[0017] Furthermore, the detection device in step S4 is a helium mass spectrometer leak detector. The helium mass spectrometer leak detector has a built-in alarm function with an alarm threshold of 1.0E-07 Pa·m3 / S. When an abnormality occurs during the detection process or the detection result is a defective product, the helium mass spectrometer leak detector will sound an alarm.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: The negative pressure helium leak detection method is used to test the airtightness of connecting pipelines. This method effectively improves the sensitivity of the test and significantly reduces the amount of helium used, thereby reducing testing costs. Simultaneously, a testing fixture is incorporated to position the connecting pipeline. This fixture has a positioning groove adapted to the connecting pipeline, ensuring its stable position during testing and preventing errors caused by movement or displacement, thus improving testing accuracy. Furthermore, one end of the positioning groove has a freely extending space, accommodating the testing needs of connecting pipelines of various lengths, further enhancing the versatility and flexibility of the device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the assembly of the connecting pipe of the present invention located on the positioning groove.

[0021] Figure 3This is a schematic diagram of the overall structure of the connecting pipeline of the present invention.

[0022] Figure 4 This is a cross-sectional view of the overall structure of the present invention.

[0023] Figure 5 This is a schematic diagram of the positioning plate of the present invention.

[0024] Figure 6 For the present invention Figure 5 Enlarged view of point M.

[0025] Figure 7 This is a partial cross-sectional view of the overall structure of the present invention.

[0026] Figure 8 This is an exploded view of the overall structure of the present invention.

[0027] Figure 9 This is a schematic diagram of the structure of the base plate of the present invention.

[0028] Figure 10 This is a schematic diagram of the detection connector of the present invention.

[0029] Reference numerals: 1-Support base, 11-Interval space, 2-Detection fixture, 21-Receiving cavity, 22-Base plate, 221-Groove, 222-Connecting groove, 23-Positioning plate, 231-Protrusion, 232-Guide surface, 24-Cover plate, 25-Baffle, 251-End plate, 252-Side plate, 26-Fixed base, 27-Mounting base, 3-Positioning groove, 31-First recessed groove, 311-Slot, 312-First transition groove, 313-Second transition groove, 32-Pipe groove, 33-Second recessed groove, 331-Opening, 4-Detection connector, 41-Detection port, 42-Connection port, 5-Connecting pipe, 51-Connector, 511-Annular protrusion, 6-Inlet channel, 61-Outlet, 62-Inlet hole, 63-Inlet pipe, 7-Drive component, 8-Detection device. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] See Figure 1-10 .

[0032] The traditional principle for airtightness testing of connecting pipe 5 is the positive pressure helium leak detection method. This involves pressurizing helium gas and filling the connecting pipe 5 with it. A detection device 8 then checks the outside air for helium leakage to determine the condition of the connecting pipe 5. However, this method typically creates high pressure inside the connecting pipe 5. This can easily cause plastic deformation and damage to the connecting pipe 5, and can also lead to bulging and leakage of the flexible seal at the connector 51 at the end of the connecting pipe 5, creating false leak signals. This makes it difficult for inspectors to distinguish between leaks in the pipe itself and leaks in the seal, affecting the accuracy of the test. Repeated verification is required, further increasing testing time and efficiency. Furthermore, helium is a rare gas and a non-renewable resource with high procurement costs. After testing with the traditional positive pressure helium leak detection method, it is difficult to quickly and completely remove the helium from the connecting pipe 5, preventing full recycling. This not only wastes helium but also causes residual helium to interfere with the testing of subsequent workpieces, significantly reducing efficiency in batch testing.

[0033] Therefore, such as Figure 1-4 As shown, this application discloses a method for testing leakage in connecting pipes of a computer cooling system, including a support base 1, a testing fixture 2 on the support base 1, a receiving cavity 21 and a testing connector 4 on the testing fixture 2, the testing connector 4 being able to move back and forth on the testing fixture 2, and a positioning groove 3 adapted to the connecting pipe 5 within the receiving cavity 21. During testing, the connecting pipe 5 is placed within the positioning groove 3, which can limit and fix the connecting pipe 5, preventing the testing results from being affected by the swinging or deformation of the connecting pipe 5, thus ensuring the accuracy of the test. One end of the positioning groove 3 is a free end, and the other end passes through the receiving cavity 21 and communicates with the outside, which allows the testing connector 4 to be sealed to the connecting pipe 5 within the positioning groove 3, and also allows the device of this application to be applicable to connecting pipes 5 of different lengths and specifications, thereby improving its applicability and making it more convenient and flexible to use. The receiving cavity 21 is also provided with an air inlet channel 6, which is used to inject helium into the receiving cavity 21. The receiving cavity 21 is provided with a cover plate 24, which covers the receiving cavity 21 to form a chamber that is basically isolated from the outside air. At the same time, it is convenient to open the cover plate 24 to put the connecting pipe 5 into the receiving cavity 21 and then close the cover plate 24 to ensure the airtightness of the receiving cavity 21, thereby ensuring that the helium in the receiving cavity 21 does not easily escape from the environment, thus ensuring the stability of the detection environment. At the same time, it can also ensure the concentration of helium, reduce helium waste, and reduce detection costs. In addition, since helium is an inert gas, high concentrations may cause asphyxiation risk. Therefore, the setting of the receiving cavity 21 can also improve the safety of detection personnel and make the operation more reassuring. The detection connector 4 is connected to a detection device 8. When the detection connector 4 moves and is sealed to the connecting pipe 5, the detection device 8 is activated. The detection device 8 can evacuate the inside of the connecting pipe 5 and perform helium detection to determine whether helium located outside the connecting pipe 5 has entered the connecting pipe 5, thereby determining whether the connecting pipe 5 is damaged. During testing, one end of the connecting pipe 5 is first sealed with a flexible seal, and then placed into the positioning groove 3 in the receiving cavity 21. Next, the detection connector 4 is driven to move and form a sealed connection with the other end of the connecting pipe 5. Then, the detection device 8 is activated to evacuate the inside of the connecting pipe 5, making the inside of the connecting pipe 5 a vacuum state. At the same time, helium is injected into the receiving cavity 21 through the air inlet channel 6, so that the helium is concentrated and fills the receiving cavity 21, thereby being evenly distributed on the outer periphery of the connecting pipe 5. Since the helium concentration and pressure outside the connecting pipe 5 are much higher than those inside the vacuum side of the connecting pipe 5, a huge helium concentration difference and pressure difference will be formed inside and outside the connecting pipe 5. If there is a tiny leak in the connecting pipe 5, helium molecules will be driven by the concentration difference to permeate from the high-pressure side (outside) to the low-pressure side (the vacuum cavity inside the connecting pipe 5) through the leak channel. At this time, when the detection device 8 continues to detect helium in the vacuum state of the connecting pipe 5, it will emit a warning sound or the indicator light will turn red to remind the user that this is a defective product. If the connecting pipe 5 does not have any defects such as gaps, scratches, bumps or abrasions, the detection device 8 will not emit a warning sound or the indicator light will turn green, indicating that the connecting pipe 5 is a qualified product, thereby completing the airtightness test of the connecting pipe 5.

[0034] By using the device of this application for testing, not only is the damage to the connecting pipe 5 caused by the traditional testing method effectively solved, but also, during the entire testing process, the staff only needs to place the connecting pipe 5 in the positioning groove 3 according to the set steps, and start the equipment after ensuring that the sealing connection is correct. There is no need for complicated operations or additional adjustments, making the operation simpler, the testing efficiency higher, and the testing accuracy higher. More importantly, the testing can be completed by injecting a small amount of helium into the receiving cavity 21 at normal pressure, which greatly reduces the amount of helium used and lowers the testing cost.

[0035] In this embodiment, the detection device 8 is a helium mass spectrometer leak detector.

[0036] It should be noted that in this embodiment, the connecting pipe 5 is a circular corrugated pipe, and each end is welded with a connector 51 communicating with the connecting pipe 5. The diameter of the connector 51 is larger than the diameter of the connecting pipe 5. During testing, the connector 51 at one end of the connecting pipe 5 is sealed by a flexible sealant to ensure that no gas leakage occurs during the test. The flexible sealant is made of a highly elastic material, which can fit tightly against the inner wall of the connector 51 to form a reliable sealing effect, while avoiding damage to the surface of the connector 51. When the connector 51 at the other end of the connecting pipe 5 is inserted into the test connector 4, a sealed connection is formed, thereby ensuring the sealing between the connecting pipe 5 and the test connector 4 and further improving the reliability of the test.

[0037] like Figure 5 As shown, to improve the stability of the positioning groove 3 in limiting and fixing, the positioning groove 3 includes a first recess 31, a tube groove 32, and a second recess 33 arranged coaxially. The tube groove 32 is located between the first recess 31 and the second recess 33 and is adapted to the connecting pipe 5. The first recess 31 is located at one end close to the detection connector 4. When placed, the connecting pipe 5 is located in the tube groove 32, and the sealed end of the connecting pipe 5 corresponds to the second recess 33, while the unsealed end corresponds to the first recess 31, to ensure that the detection connector 4 is connected to the unsealed end of the connecting pipe 5. In addition, the setting of the first recess 31 and the second recess 33 can ensure that the connecting pipe 5 can be better fitted and snapped into the positioning groove 3, avoiding gaps in the snapping of the connecting pipe 5 and the tube groove 32 due to the size difference between the connector 51 and the connecting pipe 5, which could easily cause shaking or displacement, thereby further enhancing the stability during the detection process.

[0038] Furthermore, such as Figure 3 , Figure 6As shown, in this embodiment, the outer peripheral wall of the connector 51 is provided with an annular protrusion 511, and the first recess 31 is provided with a slot 311 adapted to the annular protrusion 511. A first transition groove 312 and a second transition groove 313 are respectively provided on both sides of the slot 311 along the axial direction within the first recess 31. The second transition groove 313 is located on the wall of the receiving cavity 21 and communicates with the outside. The first transition groove 312 connects the slot 311 and the tube groove 32, and the first transition groove 312 and the second transition groove 313... The diameter of the slot is smaller than that of the slot 311. Therefore, when the annular protrusion 511 is located in the slot 311, when the connecting pipe 5 moves axially, the two sides of the annular protrusion 511 will abut against the groove wall of the slot 311, making the connecting pipe 5 unable to move axially. This effectively prevents the connecting pipe 5 from shifting during the testing process, ensuring the accuracy of the test results, and further ensures the precise and efficient insertion of the test connector 4 and the connector 51 of the connecting pipe 5, greatly improving the testing efficiency.

[0039] In this embodiment, there are several second sinks 33, each of which is spaced apart along the axial direction of the pipe groove 32, and the distance between two adjacent second sinks 33 is not equal. Users can flexibly set them according to actual needs to better adapt to connection pipes 5 of different lengths.

[0040] Furthermore, such as Figure 7 As shown, the second sink 33 located at the end of the tube 32 is also provided with an opening 331 in the axial direction. A distance L is provided between the opening 331 and the inner wall of the receiving cavity 21. When the length of the connecting pipe 5 is longer than the length of the tube 32, the end of the connecting pipe 5 can pass through the opening 331 and be placed in the space formed by the distance L, which further improves the practicality and flexibility of the detection fixture 2.

[0041] Furthermore, such as Figure 8 As shown, the testing fixture 2 includes a base plate 22, a positioning plate 23, and several baffles 25 surrounding the base plate 22. The baffles 25, the base plate 22, and the cover plate 24 surround the receiving cavity 21. The positioning plate 23 is located in the receiving cavity 21 and placed on the base plate 22. The positioning groove 3 is provided on the positioning plate 23. The plates are detachably connected and fixed to each other by screws, which facilitates the processing and disassembly of the testing fixture 2.

[0042] In this embodiment, the baffle 25 includes an end plate 251 and two side plates 252. The cover plate 24 is rotatably connected to one of the side plates 252 via a hinge chain, which facilitates opening and closing. The length of the side plate 252 is equal to the distance L plus the length of the positioning plate 23. The width of the positioning plate 23 and the bottom plate 22 are the same. This can minimize the space of the receiving cavity 21, thereby reducing the amount of helium used and further reducing the detection cost. At the same time, the smaller space of the receiving cavity 21 also helps to improve the uniformity of helium concentration, ensuring the accuracy and stability of the detection results.

[0043] In some embodiments, the cover plate 24 and the baffle plate 25 may be made of transparent material, which makes it easy for operators to observe the detection process in real time and detect any abnormalities that may occur during the detection process, such as whether the connecting pipe 5 has shifted in the receiving cavity 21, or whether the connection between the detection connector 4 and the connecting pipe 5 has become loose, thereby improving the accuracy and reliability of the detection.

[0044] It should be noted that, as Figure 6 , Figure 8 As shown, the end plate 251 is located at one end of the bottom plate 22 near the second sink 33, and the other end of the receiving cavity 21 is an open end, which facilitates the connection between the detection connector 4 and the connecting pipe 5. Therefore, in order to improve the sealing of the receiving cavity 21, the positioning plate 23 is provided with protrusions 231 on both sides of the first sink 31. The protrusions 231 can reduce the opening area 331 of the open end of the receiving cavity 21 to a certain extent, thereby effectively preventing the leakage of helium gas in the receiving cavity 21. The slot 311 is provided on the protrusion 231, and the protrusion 231 is also provided with guide surfaces 232 on both sides of the slot 311, which have a guiding effect on the placement of the connecting pipe 5.

[0045] Furthermore, such as Figure 9 As shown, the base plate 22 is provided with a groove 221 that matches the positioning plate 23. The positioning plate 23 is located in the groove 221 and is screwed and fixed to the base plate 22. The groove 221 is provided to position the positioning plate 23. On the one hand, it can strengthen the connection between the base plate 22 and the positioning plate 23. On the other hand, it can also ensure the accurate installation position of the positioning plate 23 on the base plate 22, thereby improving the assembly accuracy and operational stability of the device.

[0046] Furthermore, such as Figure 4 , Figure 9As shown, the air intake channel 6 includes an air outlet 61, an air inlet 62, and an air intake pipe 63 for connecting the air inlet 62 and the air outlet 61. The air outlet 61 is formed on the bottom of the positioning groove 3 of the positioning plate 23, and multiple outlets are spaced apart along the axial direction of the positioning groove 3, so that the helium gas can immediately contact the connecting pipe 5 when injected, and form a uniform helium atmosphere around the connecting pipe 5, thereby improving the sensitivity and accuracy of detection. The air inlet 62 is located on the base plate 22 and is connected to an external helium source, while the air intake pipe 63 is located between the base plate 22 and the positioning plate 23. Specifically, the bottom plate 22 has a connecting groove 222 on its end face that corresponds to the air outlet 61. After the bottom plate 22 and the positioning plate 23 are assembled, the positioning plate 23 tightly covers the connecting groove 222 and forms the air inlet pipe 63. In use, helium gas enters the air inlet pipe 63 through the air inlet 62 and enters the receiving cavity 21 through each of the air outlets 61. The air inlet 62, the air outlet 61 and the air inlet pipe 63 overlap each other in the longitudinal direction, thereby allowing helium gas to be injected into the receiving cavity 21 in the shortest distance and improving the jetting efficiency.

[0047] Preferably, such as Figure 4 , Figure 10 As shown, since the air inlet 62 is located under the base plate 22, a gap space 11 is left between the base plate 22 and the placement surface of the support 1 to facilitate the connection between the air inlet 62 and the external helium source, making the connection between the air inlet 62 and the helium source more convenient and orderly.

[0048] Furthermore, a fixed base 26 and a mounting base 27 are screwed onto the end of the base plate 22 away from the positioning plate 23. The detection connector 4 is placed on the fixed base 26, and a driving component 7 is screwed onto the mounting base 27. The output shaft of the driving component 7 is connected to the detection connector 4 and is used to drive the detection connector 4 to slide on the fixed base 26 to achieve a sealed connection between the detection connector 4 and the connecting pipe 5. The driving component 7 can be a linear drive device such as a cylinder or an electric push rod. The stroke of its output shaft can be precisely adjusted according to the detection port position of the connecting pipe 5 to ensure that the detection connector 4 can be accurately and quickly connected to the connecting pipe 5, thereby improving detection efficiency.

[0049] Preferably, the detection connector 4 is provided with a sealing gasket (not shown in the figure). The sealing gasket is made of elastic rubber and is used to buffer the movement of the detection connector 4 by the cylinder, so as to avoid the detection connector 4 from being rigidly impacted and damaged by the connector 51 of the connecting pipe 5. At the same time, it can further enhance the sealing performance of the connection between the detection connector 4 and the connecting pipe 5.

[0050] Preferably, the detection connector 4 is provided with a detection port 41, and the outer wall of the detection connector 4 is provided with a connection port 42 that communicates with the detection port 41. The connection port 42 is used to connect with the detection device 8. When the detection connector 4 is connected to the connecting pipe 5, the detection port 41 automatically communicates with the inside of the connecting pipe 5, and the detection device 8 is connected to the inside of the connecting pipe 5 through the connection port 42. This is used to evacuate the connecting pipe 5 and monitor in real time whether helium gas enters the inside of the connecting pipe 5, thereby accurately determining whether the connecting pipe 5 is damaged.

[0051] The specific steps are as follows: Step S1: First, confirm whether the connectors 51 at both ends of the connecting pipe 5 are welded and fixed, and mark them to ensure that there is no looseness or poor welding between the connecting pipe 5 and the connector 51, so as to ensure the reliability of subsequent testing; at the same time, seal one end of the connector 51 of the confirmed connecting pipe 5 with a flexible sealant to ensure that the sealant fits tightly with the inner wall of the connector 51 to avoid gas leakage.

[0052] Step S2: Open the cover plate 24 on the receiving cavity 21, place the connecting pipe 5 into the positioning groove 3 in the receiving cavity 21, and make the unsealed end correspondingly snap into the first sink 31, while the sealed end is placed in the second sink 33. In this step, the cover plate 24 can be rotated to separate the cover plate 24 from the top of the receiving cavity 21 so that the connecting pipe 5 can be placed into the receiving cavity 21. It should be noted that the placement of the connecting pipe 5 should ensure that the unsealed end is located in the first sink 31, and that the annular protrusion 511 on the connector 51 at that end is accurately embedded in the slot 311 to form an axial limit on the connecting pipe 5; at the same time, it should be ensured that the sealed end is aligned with the second sink 33 to avoid detection errors caused by improper placement.

[0053] Step S3: Cover the cover plate 24, start the device, and the detection connector 4 will move towards the connecting pipe 5 under the drive of the drive component 7 and be sealed and inserted into the unsealed end of the connecting pipe 5. Then, helium gas is injected into the receiving cavity 21 through the air inlet channel 6. In this embodiment, the helium injection time is set to 5 seconds, and the pressure inside the helium source is typically greater than or equal to 0.5 MPa. Before being ejected, the helium passes through a pressure reducing valve for pressure regulation, ensuring an output pressure of 0.02 MPa. This ensures that the helium is injected into the receiving cavity 21 at a stable pressure, preventing excessive pressure from impacting or damaging the connecting pipe 5, and ensuring that the helium is evenly distributed within the receiving cavity 21. During the helium injection process, the operator can observe the condition inside the receiving cavity 21 in real time through the transparent cover plate 24 and baffle 25 to ensure that the position of the connecting pipe 5 remains stable and that no abnormalities occur. If any misalignment of the connecting pipe 5 or loosening of the connection between the detection connector 4 and the connecting pipe 5 is detected, the operation can be stopped immediately and adjustments made to ensure the smooth progress of the detection process.

[0054] Step S4: After helium injection is complete, the detection device 8 is activated. The detection device 8 automatically enters the vacuuming stage, maintaining a vacuum inside the connecting pipe to ensure that the gas inside the connecting pipe 5 is completely expelled, thus creating a suitable low-pressure environment for testing. After the test, the detection device 8 will determine whether there is a leak in the connecting pipe 5 based on the test results. To improve the user experience, the detection device 8 (i.e., the helium gas spectrometer leak detector) is usually equipped with a display screen. The display screen can show the test data and results in real time, allowing users to quickly determine the status of the connecting pipe 5 by observing the information on the screen. If the test results show no leak, it indicates that the connecting pipe 5 is well-sealed and can continue to be used in the cooling system. If a leak is detected, the specific leak location and leakage amount will be marked on the screen, facilitating subsequent repair or replacement operations.

[0055] Preferably, the device is also equipped with an alarm function. If an abnormality occurs during the testing process or if the connecting pipe 5 is found to be defective after the testing is completed, the alarm function will be activated immediately, and the operator will be reminded to handle the situation in a timely manner by sounding an alarm or emitting a red indicator light. In this embodiment, the alarm threshold is 1.0E-07 Pa.m3 / S. If no alarm is sounded or the indicator light is green, it indicates that the connecting pipe 5 is qualified and there is no leakage. This not only enhances the safety of the testing process, but also further reduces the error that may be caused by human negligence.

[0056] Finally, after the test is completed, the drive unit 7 will automatically retract to separate the test connector 4 from the connecting pipe 5. The user can then directly remove the connecting pipe 5 by rotating the cover plate 24 and mark the qualified and unqualified products to transfer the qualified products to the next process.

[0057] The innovation of this invention lies in employing a negative pressure helium leak detection method to test the airtightness of connecting pipelines. This effectively improves the sensitivity of the test while significantly reducing the amount of helium used, thereby reducing testing costs. Simultaneously, a testing fixture is included to position the connecting pipeline. The fixture contains a positioning groove adapted to the connecting pipeline, ensuring a stable position during testing and preventing errors caused by movement or displacement, thus improving testing accuracy. Furthermore, one end of the positioning groove has a freely extending space, accommodating the testing needs of connecting pipelines of various lengths, further enhancing the versatility and flexibility of the device.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A method for testing leakage in connecting pipes of a computer cooling system, characterized in that, Includes the following steps: Step S1: Connectors (51) are fixed at both ends of the connecting pipe (5), and one end of the connector (51) is sealed by a flexible sealing element; Step S2: Place the connecting pipe (5) into the testing fixture (2). The testing fixture (2) is provided with a receiving cavity (21) and a testing connector (4). The receiving cavity (21) is provided with a positioning groove (3) that is compatible with the connecting pipe (5). The connecting pipe (5) is inserted into the positioning groove (3). The positioning groove (3) is also provided with a slot (311). The slot (311) corresponds to the unsealed end of the connecting pipe (5) and is used to restrict the axial movement of the connecting pipe (5). By driving the testing connector (4) to move towards the connecting pipe (5), the unsealed end of the connecting pipe (5) is sealed and connected to the testing connector (4). Step S3: An air inlet channel (6) is provided in the cavity (21). One end of the air inlet channel (6) is connected to the cavity (21), and the other end is connected to an external helium source. The helium source is turned on so that helium is injected into the cavity (21) through the air inlet channel (6). Step S4: A detection device (8) is connected to the detection connector (4). After injecting helium, the detection device (8) is started. The detection device (8) will evacuate the inside of the connecting pipe (5) to keep the inside of the connecting pipe (5) in a vacuum state. Then, a leak test is performed on the inside of the connecting pipe (5) to confirm whether helium has seeped into the connecting pipe (5). If helium is detected, the connecting pipe (5) is determined to be a defective product; if helium is not detected, the connecting pipe (5) is determined to be a qualified product. Step S5: After the test is completed, drive the test connector (4) to reset, so that the test connector (4) is separated from the connecting pipe (5), and take out the connecting pipe (5).

2. The method for testing leakage in connecting pipes of a computer cooling system according to claim 1, characterized in that, In step S2, the connector (51) is provided with an annular protrusion (511). By abutting the two sides of the annular protrusion (511) in the axial direction with the groove wall of the slot (311), the unsealed end of the connecting pipe (5) is fixed.

3. The method for testing leakage in connecting pipes of a computer cooling system according to claim 2, characterized in that, The positioning groove (3) is provided with a first sink (31) and several second sinks (33). The sealed end of the connecting pipe (5) is placed on the second sink (33) according to its length, while the unsealed end of the connecting pipe (5) is placed on the first sink (31).

4. The method for testing leakage in connecting pipes of a computer cooling system according to claim 3, characterized in that, A cover plate (24) is rotatably connected above the receiving cavity (21), and the connecting pipe (5) enters the receiving cavity (21) through the opening and closing of the cover plate (24).

5. The method for testing leakage in connecting pipes of a computer cooling system according to claim 1, characterized in that, In step S3, the pressure inside the helium source is greater than or equal to 0.5 MPa, and the pressure at which the helium source injects helium into the containment cavity (21) is 0.02 MPa.

6. The method for testing leakage in connecting pipes of a computer cooling system according to claim 5, characterized in that, The helium injection time is 5 seconds.

7. The method for testing leakage in connecting pipes of a computer cooling system according to claim 6, characterized in that, The air inlet channel (6) has several air outlets (61), which are located on the bottom of the positioning groove (3) so that when helium is injected, the helium is concentrated and dispersed around the connecting pipe (5).

8. The method for testing leakage in connecting pipes of a computer cooling system according to claim 1, characterized in that, The testing fixture (2) also includes a driving component (7), which is a cylinder. The driving component (7) is fixed on the testing fixture (2), and its output end is connected to the testing connector (4).

9. The method for testing leakage in connecting pipes of a computer cooling system according to claim 8, characterized in that, The detection connector (4) is provided with a sealing gasket. The sealing gasket is made of elastic rubber and is used to buffer the movement of the detection connector (4) driven by the cylinder, so as to avoid the detection connector (4) from being rigidly collided with the connector (51) of the connecting pipe (5) and being damaged.

10. The method for testing leakage in connecting pipes of a computer cooling system according to claim 1, characterized in that, The detection device (8) in step S4 is a helium mass spectrometer leak detector. The helium mass spectrometer leak detector has a built-in alarm function with an alarm threshold of 1.0E-07 Pa.m3 / S. When an abnormality occurs in the detection process or the detection result is unqualified, the helium mass spectrometer leak detector will sound an alarm.

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