CN116878780A

CN116878780A - Test system and test method for detecting air tightness of liquid cooling radiator

Info

Publication number: CN116878780A
Application number: CN202310904420.1A
Authority: CN
Inventors: 赵丽
Original assignee: Suzhou Inspur Intelligent Technology Co Ltd
Current assignee: Suzhou Inspur Intelligent Technology Co Ltd
Priority date: 2023-07-21
Filing date: 2023-07-21
Publication date: 2023-10-13

Abstract

The invention relates to the technical field of servers, and discloses a test system and a test method for detecting the air tightness of a liquid cooling radiator, wherein the test system comprises the following components: at least one test base, wherein a containing cavity and a plug are arranged in the test base, the containing cavity is suitable for containing a to-be-tested article, and the plug is suitable for being inserted into two ends of a water pipe of the to-be-tested article; the pressurizing mechanism is provided with a pressure output end which is communicated with the inside of the test base; the data acquisition mechanism is provided with a plurality of acquisition ends which are respectively arranged in the corresponding test bases; the collecting end is provided with an opening state in which the accommodating cavity is communicated with the outside, and a closing state in which the accommodating cavity is in a closed environment; and the data acquisition mechanism is in communication with the pressurizing mechanism. Compared with the traditional testing method, the method does not need manual judgment, does not need to process the liquid cooling radiator after the testing is completed, simplifies the testing flow, saves the testing time, and can improve the testing efficiency.

Description

Test system and test method for detecting air tightness of liquid cooling radiator

Technical Field

The invention relates to the technical field of servers, in particular to a test system and a test method for detecting the air tightness of a liquid cooling radiator.

Background

The liquid cooling server is a server which uses a liquid cooling radiator to radiate heat, and the air cooling server is a server which uses an air cooling radiator to radiate heat. The market occupation rate of the existing liquid cooling server is gradually increased, and the liquid cooling server becomes a trend of future server market development, and has the characteristics of low noise, good heat dissipation performance and low power consumption compared with the traditional air cooling server. Because the circulating medium used for cooling the liquid cooling server is liquid, once leakage occurs, serious accidents such as short circuit, hardware fault damage, machine room fire and the like can be caused to the server in operation. Therefore, the heat sink tightness of the liquid cooling server must be quality-critical.

In the prior art, the traditional air tightness test method of the liquid cooling radiator is to place the liquid cooling radiator in liquid, and judge whether the air tightness of the radiator is good or bad by pressurizing to see whether the liquid is bubbling or not. After the test is completed by the test method, the liquid cooling radiator is taken out of the liquid, and after the surface liquid is removed, the liquid can flow to the subsequent working procedure, which is time-consuming and labor-consuming.

Disclosure of Invention

In view of the above, the invention provides a testing system and a testing method for detecting the air tightness of a liquid-cooled radiator, so as to solve the problem that the traditional air tightness testing method of the liquid-cooled radiator in the prior art is time-consuming and labor-consuming.

In a first aspect, the present invention provides a test system for detecting air tightness of a liquid-cooled radiator, the test system comprising:

at least one test base, wherein a containing cavity and a plug are arranged in the test base, the containing cavity is suitable for containing a to-be-tested article, and the plug is suitable for being inserted into two ends of a water pipe of the to-be-tested article;

the pressurizing mechanism is provided with a pressure output end which is communicated with the inside of the test base;

the data acquisition mechanism is provided with acquisition ends, the number of the acquisition ends corresponds to the number of the test bases one by one, and the acquisition ends are respectively arranged in the corresponding test bases; the collecting end is provided with an opening state in which the accommodating cavity is communicated with the outside, and a closing state in which the accommodating cavity is in a closed environment; and the data acquisition mechanism is in communication with the pressurizing mechanism.

The beneficial effects are that: different from the traditional testing method, when the liquid cooling radiator is tested, the external pressure reference method is adopted to judge whether the air tightness of the tested liquid cooling radiator is qualified or not, namely, the pressurizing mechanism is adopted to pressurize the inside of the testing base, after the pressure maintaining is finished, the gas parameters in the open state are collected through the collecting end, so that the air tightness of the to-be-tested product is judged, and the result can be automatically given out through the data acquisition mechanism. Compared with the traditional testing method, the method does not need manual judgment, does not need to process the liquid cooling radiator after the testing is completed, simplifies the testing flow, saves the testing time, and can improve the testing efficiency.

In an alternative embodiment, the plug is provided with a plurality of models, and each model corresponds to the specification of the liquid cooling radiator one by one.

The beneficial effects are that: when the liquid cooling radiators with different specifications and models are tested, the plugs with corresponding models can be selected directly according to the corresponding models of the liquid cooling radiators, so that the plugs are matched with the specifications of the liquid cooling radiators, the water inlet and outlet interfaces of the liquid cooling radiators can be completely plugged by the plugs, the tightness of the interface positions in the testing process is ensured, and the accuracy of the testing result can be improved.

In an alternative embodiment, the test base includes: the base and the upper cover are buckled with each other, the base and the upper cover are internally surrounded to form the accommodating cavity, and a sealing ring is arranged between the base and the upper cover.

The beneficial effects are that: through setting up test base into base and upper cover of mutual lock, can make things convenient for the tester to put the liquid cooling radiator that waits to test in holding the chamber, simultaneously, set up the sealing washer between base and upper cover and can improve test base's tightness, prevent to influence the gas tightness test result of liquid cooling radiator because of test base's leakproofness problem own to test result's accuracy has been improved.

In an alternative embodiment, the pressurizing mechanism includes:

the air compression device comprises a piston cylinder and a piston, wherein the piston and the inner wall of the piston cylinder are in a sealing state; the outlet of the piston cylinder is communicated with the accommodating cavity;

the driving assembly is provided with a driving end, the driving end is connected with the piston, and the driving end drives the piston to reciprocate in the piston cylinder.

In an alternative embodiment, when the test base is provided with a plurality of air compression devices, the number of the air compression devices corresponds to the number of the test bases, the driving end is connected with one side of a connecting plate, and one side of the connecting plate is connected with a plurality of pistons of the air compression devices through screws.

The beneficial effects are that: through being connected drive end and a plurality of air compressor arrangement with drive assembly, can test a plurality of test base simultaneously to need not to test the liquid cooling radiator in every test base alone, when there is a large amount of liquid cooling radiator to need test, saved tester's time, can improve efficiency of software testing by a wide margin.

In an alternative embodiment, the piston cylinder is constructed of a transparent material.

The beneficial effects are that: in the test process, the test bases are pressurized by adopting the same pressurizing value, so that if the air tightness of the liquid cooling radiator in each test base is qualified, the piston in the piston cylinder is at a preset position. If the piston position is not at the preset position, the air tightness of the liquid cooling radiator is problematic. The piston cylinder is arranged in a transparent state, so that a tester can clearly see the actual position of the piston, and the air tightness data acquired by the data acquisition mechanism are combined to judge the air tightness of the liquid cooling radiator more accurately, thereby being beneficial to improving the accuracy of a test result.

In an alternative embodiment, the piston cylinder is marked with graduation values along the length direction.

The beneficial effects are that: before the air compression device is used for pressurizing, the actual positions of the pistons of the air compression devices before pressurizing are required to be adjusted, and consistency of the volumes after the air compression devices are inflated, namely, the positions of the pistons are in the same scale, so that the pistons can be ensured to be pressed down to the preset positions, the pressurizing values are the same, and the accuracy of the test results is improved.

In an alternative embodiment, the data acquisition mechanism includes:

A digital flowmeter in communication with the pressurizing mechanism; the digital flowmeter is provided with the acquisition end; acquiring air pressure data through the flow velocity of the air flow when the air flow passes through a digital flowmeter;

and the industrial personal computer is in communication connection with the digital flowmeter.

In an alternative embodiment, the data acquisition mechanism further comprises:

and the MES system is in communication connection with the industrial personal computer.

The beneficial effects are that: through setting up the MES system and connecting the MES system with the industrial personal computer in a communication way, the MES system can receive data uploaded by the industrial personal computer, so that a tester can monitor the test condition in real time through the MES system and bind all component information together, and the liquid cooling radiator which is unqualified in test can not flow to the next working procedure in the upward process flow, thereby realizing the fool-proof process flow. And when the abnormal notification triggering rule is reached, the MES system can directly notify a tester to perform field processing.

In an alternative embodiment, the data acquisition mechanism further comprises:

the code scanning gun is in communication connection with the industrial personal computer; the code scanning gun is used for scanning equipment identifiers of the liquid cooling radiator.

In an alternative embodiment, the data acquisition mechanism further comprises:

The docking station is provided with an external port and a plurality of input ports, and the external port is in communication connection with the industrial personal computer; each of the input ports is connected with the digital flowmeter.

In a second aspect, the present invention further provides a test method for detecting the air tightness of a liquid cooling radiator, where the test method includes:

controlling a pressurizing mechanism to pressurize the to-be-tested product in the accommodating cavity of the test base to a preset pressure value;

maintaining pressure for a preset time period;

after the preset time length is reached, the acquisition end is controlled by a data acquisition mechanism to be switched from the closed state to the open state, so that the actual air pressure value of the accommodating cavity is acquired;

and acquiring the air tightness of the to-be-detected product according to the actual air pressure value and the reference air pressure value.

In an alternative embodiment, before the controlling and pressurizing mechanism pressurizes the to-be-tested product in the accommodating cavity of the test base to a preset pressure value, the method further comprises:

respectively placing the two reference products into the respective accommodating cavities of the two test bases;

controlling a pressurizing mechanism to pressurize the accommodating cavity to the preset pressure value;

maintaining the pressure for the preset time period;

after the preset time length is reached, the acquisition end is controlled by a data acquisition mechanism to be switched from the closed state to the open state, so that the calibration air pressure values corresponding to the two reference products are respectively acquired;

If the two calibration air pressure values are the same, the two test bases are qualified;

if the two calibration air pressure values are different, the test base corresponding to the maximum calibration air pressure value is qualified.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is an overall schematic diagram of a test system according to an embodiment of the present invention;

FIG. 2 is an overall schematic diagram of a pressurizing mechanism according to an embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating a whole of a pressurizing mechanism and a test base according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a test interface on an industrial personal computer according to an embodiment of the present invention;

FIG. 5 is a schematic flow chart of calibration in an embodiment of the invention;

FIG. 6 is a flow chart of a testing method according to an embodiment of the invention.

Reference numerals illustrate:

1. an electric cylinder; 2. a pressurizing mechanism; 3. a test base; 31. an upper cover; 32. a base; 33. a seal ring; 34. a receiving chamber; 35. a plug; 4. a digital flowmeter; 5. a docking station; 6. a code scanning gun; 7. an industrial personal computer; 8. MES system.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be connected wirelessly or in a wired way. The specific meaning of the above terms in the present invention can be understood in a specific case by a worker of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Embodiments of the present invention are described below with reference to fig. 1 to 6.

According to an embodiment of the present invention, in one aspect, the present invention provides a test system for detecting air tightness of a liquid-cooled radiator, as shown in fig. 1, the test system includes a test base 3, a pressurizing mechanism 2, and a data acquisition mechanism. Liquid cooling radiator: consists of a water cooling block and a pipeline. The water cooling block is a metal block with a water channel inside, is made of copper or aluminum, is contacted with a high-power chip such as a CPU (Central processing Unit), a GPU (graphics processing Unit) and the like, and absorbs heat. When in use, the circulating liquid is filled, and the circulating liquid circularly flows to take away heat under the action of the external water pump. Compared with the traditional air cooling heat dissipation mode, the server adopting the liquid cooling heat radiator has higher heat dissipation efficiency and lower noise.

Specifically, in the embodiment of the present invention, at least one test base 3 may be provided, that is, a tester may increase or decrease the number of test bases 3, such as one, two, three, etc., according to actual test conditions. The number of test bases 3 is related to the liquid-cooled heat sink to be tested. The liquid cooling radiator in this embodiment is exemplified by a two-way liquid cooling radiator, and the shape and the number of ways are not necessarily limited to this embodiment, and may be changed according to actual situations. The inside of the test base 3 is provided with a containing cavity 34 and a plug 35, the containing cavity 34 is suitable for placing the to-be-tested product, and the containing cavity 34 is in a sealing state with the external environment. The accommodating cavity 34 is a mold opened according to the shape corresponding to the liquid cooling radiator, so that different molds are replaced according to the shape and the size of different liquid cooling radiators. The plug 35 is suitable for being inserted into two ends of the water pipe of the to-be-detected article, and the plug 35 is of a solid design and is used for plugging a water inlet and outlet interface of the liquid cooling radiator. Moreover, it should be noted that the whole inside and outside of the test base 3 should at least bear the design pressure requirement of the liquid cooling radiator, and no deformation is generated during the test.

Further, in the embodiment of the present invention, the pressurizing mechanism 2 is provided with a pressure output end which communicates with the inside of the test base 3, and the pressurizing mechanism 2 is used to pressurize the accommodating chamber 34 inside the test base 3. The pressurized environment can be a gas environment or other fluid environments, so long as an external pressure test mode can be performed, and the test is completed without pressure relief and processing of the liquid cooling radiator.

Further, in the embodiment of the present invention, the data acquisition mechanism is provided with acquisition ends, the number of the acquisition ends corresponds to the number of the test bases 3 one by one, and the acquisition ends are respectively installed in the corresponding test bases 3. The collecting end is provided with an opening state that the accommodating cavity 34 is communicated with the outside, and a closing state that the accommodating cavity 34 is in a closed environment, and the data acquisition mechanism is in communication connection with the pressurizing mechanism 2. Specifically, a mounting hole may be formed in the test base 3, the mounting hole communicates with the outside and the accommodating cavity 34, the collecting end is disposed in the mounting hole, and sealing treatment is performed between the collecting end and the mounting hole. In this way, when the collection end is opened, the accommodating cavity 34 can be communicated with the outside, and when the collection end is closed, the accommodating cavity 34 can be in a closed environment and isolated from the outside.

In the actual test, when the pressurizing mechanism 2 has started pressurizing and is pressurized to a preset pressure value, the pressurizing mechanism 2 starts to enter a pressure maintaining state, that is, the internal pressure is kept unchanged. When the pressurizing mechanism 2 is in the pressure maintaining state, if the liquid cooling radiator has the tiny leakage condition, the pressurized gas can fully enter the liquid cooling radiator, the pressure maintaining set time cannot be too short or too long, if the pressure maintaining set time is too short, the gas cannot fully enter the liquid cooling radiator, and if the pressure maintaining set time is too long, the high air pressure can cause certain damage to the internal structure of the liquid cooling radiator. Thus, the dwell time may be selected to be 5 to 10 seconds.

After reaching the pressure maintaining state for a predetermined time, the data acquisition mechanism acquires the air tightness of the to-be-measured article by switching the acquisition end from the closed state to the open state. That is, after the collection end is opened, the pressurized air flow passes through the collection end, and the specific parameters of the air flow are collected, so that the collected specific parameters of the air flow can be compared with the standard air flow parameters for realizing measurement, and if the difference value between the collected specific parameters of the air flow and the standard air flow parameters is within the error range, the air tightness of the to-be-measured product can be considered as normal. If the difference between the collected specific air flow parameter and the standard air flow parameter is out of the error range, the air tightness of the to-be-detected product can be considered abnormal. Therefore, whether the air tightness of the to-be-detected product is normal or not can be judged according to the specific parameters of the air flow. The specific parameters of the gas flow may be gas flow rate, gas pressure, gas temperature, etc.

Thus, unlike the traditional testing method, the embodiment of the invention does not need to prepare a special gas pipeline testing environment when testing the liquid cooling radiator. Meanwhile, the invention adopts an external pressure reference method to judge whether the air tightness of the measured liquid cooling radiator is qualified, namely adopts the pressurizing mechanism 2 to pressurize the inside of the test base 3, and after the pressure maintaining is finished, the gas parameters in the open state are collected through the collecting end, so that the air tightness of the to-be-measured product is judged, and the result can be automatically given out through the data acquisition mechanism. Compared with the traditional testing method, the method does not need manual judgment, thereby reducing the error of manual judgment in the traditional air tightness test, and particularly greatly improving the accuracy of micro leakage detection. The test adopts external pressure, and compared with the traditional internal pressure test, the product test can be taken down without pressure relief, and can flow to the next process without additional treatment, so that the test flow is simplified, the test time is saved, and the test efficiency can be improved.

Further, in an alternative embodiment, as shown in fig. 5, the test base 3 may be calibrated before testing, so as to prevent bad air tightness such as air leakage and damage of the test base 3, and batch errors of test results affecting the air tightness of the liquid cooling radiator.

Specifically, much like the test procedure, a tester may prepare at least two 1:1 solid standard, one is installed in the base of standard, and the other is installed in the base of tested product to simulate normal test. In this embodiment, the reference article is solid 1 with the same measured article: 1 model, the materials used must be dense, and the situation of absorbing gas cannot exist, such as metal and plastic materials. In the test, if the obtained test data are the same, the test base 3 is considered to have good air tightness, and the test can be performed. If the obtained test data are different, for example, the measured air flow parameter of the reference base is smaller than that of the tested base, the air seeps out from the reference base, the air tightness of the reference base is poor, and adjustment, replacement or repair is needed. Similarly, if the measured airflow parameter of the measured product base is smaller than the airflow parameter of the reference product base, it indicates that the air seeps out from the measured product base, and the air tightness of the measured product base is poor, and adjustment, replacement or repair is required.

So set up, adopt benchmark contrast mode, because benchmark article is in same environment with the article of being surveyed, need not to pay attention to the influence that external environment's change brought, can further promote the accuracy of test.

It is particularly noted that when switching between different types of liquid-cooled heat sinks for testing, the mold in the base is first replaced so that the receiving cavity 34 matches the liquid-cooled heat sink, and then calibration is performed. The base may be calibrated at intervals of 1 hour, 2 hours, etc., and those skilled in the art may change the interval according to practical situations, and the present embodiment is merely illustrative, but the present embodiment is not limited thereto, and the same technical effects can be achieved.

In an alternative embodiment, the plug 35 is provided with a plurality of models, each model corresponding to the specifications of the liquid-cooled radiator one by one. So set up, when testing the liquid cooling radiator of different specification models, can directly select the plug 35 of corresponding model according to the corresponding model of liquid cooling radiator for plug 35 and the specification assorted of liquid cooling radiator, make plug 35 can shutoff liquid cooling radiator's business turn over water interface completely, guaranteed the leakproofness of interface position in the test process, and then can improve the accuracy of test result.

In an alternative embodiment, as shown in fig. 3, the test base 3 includes a base 32 and an upper cover 31 that are fastened to each other, the base 32 and the upper cover 31 internally enclose the accommodating cavity 34, and a sealing ring 33 is disposed between the base 32 and the upper cover 31. In this embodiment, the base 32 and the upper cover 31 may be fastened manually, or may be fastened automatically by a device. So set up, through setting up test base 3 into base 32 and upper cover 31 of mutual lock, can make things convenient for the tester to put the liquid cooling radiator that waits to test in holding chamber 34, simultaneously, set up sealing washer 33 between base 32 and upper cover 31 can improve test base 3's tightness, prevent to influence the gas tightness test result of liquid cooling radiator because of the leakproofness problem of test base 3 itself to test result's accuracy has been improved.

In an alternative embodiment, the pressurizing mechanism 2 includes an air compression device and a drive assembly. Specifically, as shown in fig. 2, the air compression device includes a piston cylinder and a piston, the piston is in a sealed state with the inner wall of the piston cylinder, and the outlet of the piston cylinder is communicated with the accommodating cavity 34. That is, the piston cylinder and the piston form a structure similar to air blowing, and before the piston is not tested, the piston is placed at a high point to enter an inflated state. As the piston moves downwardly, the piston compresses gas through the outlet of the piston cylinder into the receiving chamber 34.

Further, the driving assembly is provided with a driving end, the driving end is connected with the piston, and the driving end drives the piston to reciprocate in the piston cylinder. The driving assembly may be divided into an automatic driving device and a manual driving device. The automatic driving device can be a driving device such as an electric cylinder 1, and the driving end is the driving end of the electric cylinder 1. The screw rod of the electric cylinder 1 is connected to the upper cover 31, and the screw rod of the electric cylinder 1 moves the upper cover 31 so that the upper cover 31 and the base 32 are fastened together. After the upper cover 31 is buckled with the base 32, the screw rod of the electric cylinder 1 continues to move, and at the moment, the piston is moved to pressurize. For the provision of the drive means as drive means, it is obviously possible to save the operating steps of the technician and to adjust the actual operating parameters of the electric cylinder 1 according to the test requirements, so that the operating efficiency can be increased. The manual driving device can also be a structure which is convenient for a technician to apply force, such as a rocking wheel, a pressing piece and the like. Meanwhile, in order to save labor for technical staff, the radius of the rocking wheel and the force arm of the pressing piece can be prolonged, namely, the length of the force arm of the rocking wheel and the pressing piece is increased according to the lever principle.

In the embodiment of the invention, a PLC (programmable logic controller) can be arranged, and the action of the electric cylinder 1 can be controlled through the PLC. The PLC control scheme described in the invention is only taken as an example of the scheme, and other programmable control schemes such as a singlechip, a DSP and the like fall within the scope of the invention. The specific control process is as follows:

If the stroke of the telescopic rod of the control cylinder 1 is set to 10cm, the control cylinder stays for 5s, namely the dwell time is 5s.

According to the formula pv=nrt of gas pressure, where P is gas pressure, V is gas volume, n is number of molecules, R is a constant, and T is absolute temperature. Under the same conditions, the pressure of the gas is inversely proportional to the volume. Assuming that the standard air pressure pv=nrt=0.1 Mpa in the piston cylinder is tested in normal temperature and normal pressure environment, the pressure parameter born by the design of the liquid cooling radiator is p1=0.2 Mpa, and the volume of the piston cylinder is at least half of that of the piston cylinder to generate 0.2Mpa pressure, the expansion length of the telescopic rod is required to be just reduced by half of that of the air blowing volume, and then the telescopic rod stays at the position for 5s. If the tested liquid cooling radiator has poor air tightness, part of compressed air in 5 seconds can enter the tested liquid cooling radiator.

After the dwell time is 5s, the data acquisition mechanism acquires the air tightness of the to-be-measured article by switching the acquisition end from the closed state to the open state after reaching the dwell state for a predetermined time.

After the test is finished, the electric cylinder 1 can be controlled to reset through the PLC, and then the acquisition end is controlled to be closed. And the tested liquid cooling radiator is taken down by a tester according to the test result. Then, the good products flow into the post-process, the defective products are separately identified and placed, and a new liquid cooling radiator to be tested is connected to enter the next test cycle.

In an alternative embodiment, when the test base 3 is provided with a plurality of air compressing devices, the number of the air compressing devices corresponds to the number of the test bases 3, the driving end is connected with one side of a connecting plate, and one side of the connecting plate is connected with a plurality of pistons of the air compressing devices through screws. When a plurality of air compression devices exist at the same time, the consistency of the volume after inflation needs to be ensured, namely, the pistons are at the same position.

Moreover, it should be noted that after the test is completed, the PLC firstly controls the electric cylinder 1 to reset, and then controls the collection end to close. The tester takes down the tested liquid cooling radiator according to the test result, and the reference product model can be reserved on the equipment as the test value of the reference product due to the plurality of test bases 3. Then, the good products flow into the post-process, the defective products are separately identified and placed, and a new liquid cooling radiator to be tested is connected to enter the next test cycle.

So set up, through being connected drive end and a plurality of air compressor arrangement with drive assembly, can test a plurality of test base 3 simultaneously to need not to test the liquid cooling radiator in every test base 3 alone, when there is a large amount of liquid cooling radiator to need test, saved tester's time, can improve test efficiency by a wide margin.

In an alternative embodiment, the piston cylinder is constructed of a transparent material. The transparent material can be plastic, resin, toughened glass, etc. In this way, since the test bases 3 are pressurized with the same pressurizing value during the test, the piston in the piston cylinder is at a predetermined position if the air tightness of the liquid-cooled radiator in each test base 3 is acceptable. If the piston position is not at the preset position, the air tightness of the liquid cooling radiator is problematic. The piston cylinder is arranged in a transparent state, so that a tester can clearly see the actual position of the piston, and the air tightness data acquired by the data acquisition mechanism are combined to judge the air tightness of the liquid cooling radiator more accurately, thereby being beneficial to improving the accuracy of a test result.

In an alternative embodiment, the piston cylinder is marked with graduation values along the length direction. So set up, because before air compressor arrangement carries out the pressurization, need adjust the actual position of a plurality of air compressor arrangement pistons before the pressurization, need guarantee the uniformity of volume after aerifing, in the position of same scale promptly, just so can guarantee that the piston pushes down to the predetermined position after, the pressurized value is the same to help improving the accuracy of test result.

In an alternative embodiment, the data acquisition mechanism includes a digital flowmeter 4 and an industrial personal computer 7. Specifically, the digital flowmeter 4 has a communication interface, and can transmit data. A digital flowmeter 4 is communicatively connected to the pressurizing mechanism 2, and the digital flowmeter 4 can be mounted in the mounting hole. The digital flowmeter 4 is provided with the acquisition end, and air pressure data are acquired through the air flow velocity when the air flow passes through the digital flowmeter 4. In this embodiment, the instantaneous peak value of the airflow flow rate may be collected, and the air tightness of the sample to be measured may be determined by comparing the actually measured instantaneous peak value of the airflow flow rate with the instantaneous peak value of the airflow rate detected in the test base 3 of the reference sample. For example, if the difference between the acquired instantaneous peak value of the flow rate of the sample and the instantaneous peak value of the flow rate of the reference sample is within the error range, the air tightness of the sample can be considered to be normal. If the difference between the acquired flow velocity instantaneous peak value of the to-be-measured product and the flow velocity instantaneous peak value of the reference product is out of the error range, the air tightness of the to-be-measured product can be considered abnormal.

Further, the industrial personal computer 7 is in communication connection with the digital flowmeter 4. The industrial personal computer 7 is provided with a test program for calibrating and controlling the PLC, collecting the uploading test data and displaying the test result. The industrial personal computer 7 and the digital flowmeter 4 can be controlled by a PLC. In the embodiment of the invention, the opening and closing of the interface of the digital flowmeter 4 can be controlled by the PLC.

In the testing process, after the pressure is maintained for 5 seconds, an interface of the digital flowmeter 4 can be controlled to be opened through the PLC, the airflow passes through the digital flowmeter 4, the instantaneous peak value of the airflow speed is collected and displayed at the (2) position of the interface in the industrial personal computer 7, the (4) position is indicated by V1, the test value of the reference product is displayed at the (4) position, and the test value is indicated by V0, as shown in fig. 4.

And then judging the difference between the test values V1 and V0, judging that the air tightness is qualified within an error allowable range, judging that the air tightness is unqualified if the air tightness exceeds the error range, displaying the test result at the position (3) of the test program interface, highlighting NG when the air tightness is unqualified, and outputting the test result.

In an alternative embodiment, the data acquisition mechanism further comprises an MES system 8, the MES system 8 being communicatively connected to the industrial personal computer 7. Specifically, the MES system 8 can be connected with the industrial personal computer 7 through a network, receives data uploaded by the industrial personal computer 7, monitors testing conditions in real time, binds information of all components together, and limits the liquid cooling radiator with unqualified testing air tightness to flow to the next working procedure in the process flow direction, so that engineering personnel are notified of field treatment when an abnormal notification triggering rule is reached.

After the test data is uploaded to the MES system 8, the test data can be automatically monitored, and meanwhile, the process flow direction of the defective products is locked to the current test procedure, so that even if the defective products are unintentionally taken from the subsequent procedure, related operations cannot be performed. The test data at least comprises PN codes of the liquid cooling radiator, equipment ID corresponding to the PN codes of the liquid cooling radiator, test values and reference values. PN code is the unique ID of the tested liquid cooling radiator, so that the test data can be traced conveniently. The PN code and the device ID corresponding to the PN code of the liquid cooling radiator are displayed at the (1) position and the (5) position respectively.

The specific monitoring steps are as follows:

s1, acquiring a test result of each liquid cooling radiator;

because the test result of each liquid cooling radiator is packaged and uniformly uploaded to the MES system 8, the MES system 8 can obtain the test result of each liquid cooling radiator. Such as having passed the air tightness test or having failed the air tightness test. I.e. whether the air tightness is qualified or not.

S2, when a plurality of NG data appear continuously or a plurality of NG data appear in a preset time, sending out prompt information;

when multiple NG data, for example, 3 NG data, 4 NG data, 5 NG data, etc., occur continuously, or multiple NG data, for example, 3 NG data, 4 NG data, 5 NG data, etc., occur discontinuously within a certain period of time, the MES system 8 sends prompt information to a technician in the system, and the prompt information can be directly sent to a terminal, such as a mobile phone or a computer. After receiving the prompt information, technicians can go to field processing to confirm whether the liquid cooling radiator is poor in air tightness or abnormal in test equipment.

S3, adding a locking mark to the defective product, wherein the locking mark is used for indicating that the defective product fails the air tightness test.

Further, the MES system 8 locks the routing flow direction of the defective product to the air tightness test procedure, and if the defective product is mistakenly taken in the later procedure, the system prompts the liquid cooling radiator to test NG in the air tightness test procedure at present and can not be bound for use when the identification code of the liquid cooling radiator is scanned.

By setting the MES system 8 and connecting the MES system 8 with the industrial personal computer 7 in a communication way, the MES system 8 can receive data uploaded by the industrial personal computer 7, so that testers can monitor testing conditions in real time through the MES system 8 and bind all component information together, and the unqualified liquid cooling radiator is limited to flow to the next process in the process flow direction, thereby realizing foolproof process flow direction. And when the exception notification triggering rule is reached, the MES system 8 can directly notify the tester to perform field processing.

In an alternative embodiment, the data acquisition mechanism further includes a code scanning gun 6, the code scanning gun 6 is in communication connection with the industrial personal computer 7, and the code scanning gun 6 is used for scanning the equipment identifier of the liquid cooling radiator.

Specifically, the code scanning gun 6 is used for scanning a unique PN code identifier of the liquid cooling radiator, so that test data tracing and equipment ID code are facilitated, and ID information is bound and recorded into a test program.

In an alternative embodiment, the data acquisition mechanism further comprises a docking station 5, and the docking station 5 is provided with an external port and a plurality of input ports, wherein the external port is in communication connection with the industrial personal computer 7, and each of the input ports is connected with the digital flowmeter 4.

The docking station 5 is used for connecting a plurality of high-precision digital flowmeters 4 to a peripheral interface of the industrial personal computer 7 and transmitting data, each port is assigned with a unique equipment ID, and the PN code of the tested liquid cooling radiator has a one-to-one corresponding binding relationship with each equipment ID, so that display data can be acquired according to the equipment IDs. And, make the unique equipment ID that every port assigned bar code or two-dimensional code, paste on corresponding base to be convenient for scan when testing, and benchmark base test procedure can set up to need not sweep the code.

In an alternative embodiment, the data acquisition mechanism may further include an air flow detection device and a marking device, where the air flow detection device and the marking device are disposed in the test base 3, and the air flow detection device and the marking device are both communicatively connected to the industrial personal computer 7. The air flow detection device is capable of detecting the overall air flow direction inside the test base 3 during the test. That is, if there is a problem in the air tightness of the sample, a part of the air flow enters the sample through the slit of the sample. In this way, the airflow detection device can directly determine the actual defect position of the to-be-detected article through the airflow direction. After the industrial personal computer 7 obtains the actual defect position of the to-be-detected product, the marking device can be controlled to mark the actual defect position, so that a technician can repair the defective product according to the actual defect position.

The device can directly detect the actual defect position of the to-be-detected product in the test process through the airflow detection device, and each defective product is independently tested after judging the defective product, and then the specific position is tested and then maintained, so that the maintenance efficiency of technicians can be greatly improved. Meanwhile, the marking device is arranged, so that the actual defect position can be marked directly, the defect position is more obvious, a technician is not required to infer the range of the actual defect position according to the actual defect position displayed on the industrial personal computer 7, and the accuracy in the maintenance process is improved.

Specifically, in the above embodiment, the airflow detecting device may be an infrared sensor or an image sensor, for example, the airflow has a certain temperature, and during the testing process, the infrared sensor directly senses the change process of the airflow, and the overall flow direction of the airflow is also detected by the infrared sensor. Likewise, a color may be added to the gas flow entering the test device, which may be, for example, pale red, pale yellow or pale green, and the defect location may be determined by a change in the colored gas.

Of course, the present embodiment is merely illustrative of specific types of airflow detecting devices, but is not limited thereto, and those skilled in the art may change according to actual situations, and may achieve the same technical effects.

In this embodiment, as shown in fig. 6, the overall flow of the test scheme is as follows:

1) First, a calibration test is performed, and after the calibration is completed, a formal test is entered.

2) The code scanning gun 6 scans the bar code of the liquid cooling radiator and the equipment ID code is input into the industrial personal computer 7.

3) The click industrial personal computer 7 sends an instruction to the PLC to start testing.

4) The screw rod of the PLC control electric cylinder 1 moves the base upper cover 31 to be buckled with the base 32.

5) After the base is buckled, the screw rod of the electric cylinder 1 continues to move, at the moment, the piston is moved to pressurize, and when the piston moves to a certain position, the screw rod of the electric cylinder 1 stops moving.

6) After the screw rod of the electric cylinder 1 stops moving for a period of time (e.g. 5S), the PLC controls the interface of the digital flowmeter 4 to be opened, the compressed gas in the accommodating chamber 34 flows out through the digital flowmeter 4, and the digital flowmeter 4 generates a flow rate value.

7) The flow rate value is transmitted to the industrial personal computer 7 through the docking station 5.

8) The industrial control receives the data transmitted by the docking station 5, only retains the flow velocity peak value for each path of test data, compares the flow velocity peak value with the collected peak flow velocity of the reference product, judges that the comparison is qualified within the error range, judges that the comparison is unqualified beyond the error range, and visually displays the result on a test interface of the industrial control computer 7.

9) The industrial personal computer 7 packs the current test data and uploads the data to the MES system 8, the data can be read at any time in the background, defective products are limited from flowing to the next process, and if the set defective product quantity notification rule is reached, a notification is sent to technicians.

10 The electric cylinder 1 is reset, then the interface of the digital flowmeter 4 is controlled to be closed, the liquid cooling radiator to be tested is taken down, good products flow into the next procedure, the bad products are separately marked and placed in an isolated mode, and the next test cycle is entered.

the pressurizing mechanism 2 is controlled to pressurize the to-be-tested product in the accommodating cavity 34 of the test base 3 to a preset pressure value; the details of the foregoing embodiments are omitted herein;

maintaining pressure for a preset time period; the details of the foregoing embodiments are omitted herein;

after the preset time length is reached, the acquisition end is controlled by a data acquisition mechanism to be switched from the closed state to the open state, so that the actual air pressure value of the accommodating cavity 34 is acquired; the details of the foregoing embodiments are omitted herein;

and acquiring the air tightness of the to-be-detected product according to the actual air pressure value and the reference air pressure value. The details of the foregoing embodiments are omitted herein.

In an alternative embodiment, before the control pressurizing mechanism 2 pressurizes the to-be-measured article in the accommodating chamber 34 of the test base 3 to a preset pressure value, the control pressurizing mechanism further includes:

placing the two reference articles into the respective accommodating cavities 34 of the two test bases 3; the details of the foregoing embodiments are omitted herein;

controlling the pressurizing mechanism 2 to pressurize the accommodating cavity 34 to the preset pressure value; the details of the foregoing embodiments are omitted herein;

maintaining the pressure for the preset time period;

after the preset time length is reached, the acquisition end is controlled by a data acquisition mechanism to be switched from the closed state to the open state, so that the calibration air pressure values corresponding to the two reference products are respectively acquired; the details of the foregoing embodiments are omitted herein;

if the two calibration air pressure values are the same, the two test bases 3 are qualified; the details of the foregoing embodiments are omitted herein;

if the two calibration air pressure values are different, the test base 3 corresponding to the maximum calibration air pressure value is qualified. The details of the foregoing embodiments are omitted herein.

Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.

Claims

1. A test system for detecting the air tightness of a liquid-cooled radiator, comprising:

at least one test base (3) internally provided with a containing cavity (34) and a plug (35), wherein the containing cavity (34) is suitable for containing a to-be-tested article, and the plug (35) is suitable for being inserted into two ends of a water pipe of the to-be-tested article;

the pressurizing mechanism (2) is provided with a pressure output end which is communicated with the inside of the test base (3);

the data acquisition mechanism is provided with acquisition ends, the number of the acquisition ends corresponds to the number of the test bases (3) one by one, and the acquisition ends are respectively arranged in the corresponding test bases (3); the collecting end is provided with an opening state that the accommodating cavity (34) is communicated with the outside, and a closing state that the accommodating cavity (34) is in a closed environment; and the data acquisition mechanism is in communication with the pressurizing mechanism (2).

2. The test system according to claim 1, wherein the plug (35) is provided with a plurality of models, each model corresponding to the specifications of the liquid-cooled radiator one-to-one.

3. The test system according to claim 2, wherein the test base (3) comprises: the base (32) and the upper cover (31) are buckled with each other, the base (32) and the upper cover (31) are internally surrounded to form the accommodating cavity (34), and a sealing ring (33) is arranged between the base (32) and the upper cover (31).

4. A test system according to any one of claims 1 to 3, wherein the pressurizing mechanism (2) comprises:

the air compression device comprises a piston cylinder and a piston, wherein the piston and the inner wall of the piston cylinder are in a sealing state; the outlet of the piston cylinder is communicated with the accommodating cavity (34);

5. The test system according to claim 4, wherein when the test seats (3) are provided in plurality, the number of air compressing devices corresponds to the number of the test seats (3), the driving end is connected to one side of a connection plate, and one side of the connection plate is simultaneously connected to a plurality of pistons of the air compressing devices by screws.

6. The test system of claim 4, wherein the piston cylinder is constructed of a transparent material.

7. The test system of claim 6, wherein the piston cylinder is marked with scale values along the length.

8. The test system of any one of claims 5 to 7, wherein the data acquisition mechanism comprises:

A digital flowmeter (4) connected in communication with the pressurizing mechanism (2); the digital flowmeter (4) is provided with the acquisition end; acquiring air pressure data through the air flow velocity when the air flow passes through the digital flowmeter (4);

and the industrial personal computer (7) is in communication connection with the digital flowmeter (4).

9. The test system of claim 8, wherein the data acquisition mechanism further comprises:

and the MES system (8) is in communication connection with the industrial personal computer (7).

10. The test system of claim 9, wherein the data acquisition mechanism further comprises:

the code scanning gun (6) is in communication connection with the industrial personal computer (7); the code scanning gun (6) is used for scanning equipment identifiers of the liquid cooling radiator.

11. The test system of claim 10, wherein the data acquisition mechanism further comprises:

the docking station (5) is provided with an external port and a plurality of input ports, and the external port is in communication connection with the industrial personal computer (7); each of the input ports is connected with the digital flowmeter (4).

12. The test method for detecting the air tightness of the liquid cooling radiator is characterized by comprising the following steps of:

the pressurizing mechanism (2) is controlled to pressurize the to-be-tested product in the accommodating cavity (34) of the test base (3) to a preset pressure value;

Maintaining pressure for a preset time period;

after the preset time length is reached, the acquisition end is controlled by the data acquisition mechanism to be switched from a closed state to an open state, so that the actual air pressure value of the accommodating cavity (34) is acquired;

13. The test method according to claim 12, characterized in that before the control pressurizing mechanism (2) pressurizes the test article in the accommodation chamber (34) of the test base (3) to a preset pressure value, it further comprises:

placing two solid reference products into the respective accommodating cavities (34) of the two test bases (3);

controlling a pressurizing mechanism (2) to pressurize the accommodating cavity (34) to the preset pressure value;

maintaining the pressure for the preset time period;

after the preset time length is reached, the acquisition end is controlled by a data acquisition mechanism to be switched from the closed state to the open state, so that the calibration air pressure values corresponding to the two solid reference products are respectively acquired;

if the two calibration air pressure values are the same, the two test bases (3) are qualified;

if the two calibration air pressure values are different, the test base (3) corresponding to the maximum calibration air pressure value is qualified.