Integrated system and method for flow channel leakage detection and flow resistance detection in liquid cooling shell

Abstract

The invention discloses an integrated system and method for flow channel leakage detection and flow resistance detection in a liquid cooling shell. The integrated system comprises a waterway system. The waterway system comprises a pressure test pump, a first electric ball valve, a first flow sensor, a differential pressure sensing module, a second electric ball valve and a water tank which are connected in sequence; the multi-stage centrifugal pump is connected with the pressure test pump in parallel; two ends of the first electric ball valve and the first flow sensor are connected in parallel with a third electric ball valve and a second flow sensor; the third electric ball valve is connected in series with the second flow sensor; two ends of the differential pressure sensing module are connected with a liquid cooling shell part to be detected; the differential pressure sensing module comprises a differential pressure sensor group. According to the invention, an automatic detection mode is adopted, and pressure and flow resistance detection of the flow channel in the shell part is automatically carried out by comprehensively using the pressure difference sensor, the pressure sensor, the flow sensor and the like, so that the limitation and complexity of manual detection are solved, meanwhile, the traceability of data is realized, and the detection scheme is efficient and reliable.

Description

Technical Field

[0001] The present invention belongs to the technical field of fluid detection, and in particular relates to an integrated system and method for leak detection and flow resistance detection in a flow channel of a liquid-cooled shell. Background Art

[0002] Fluid detection technology refers to the use of sensors, instruments and other equipment to monitor and analyze the medium in the pipeline in real time, so as to understand the running status of the fluid, so as to predict possible risks and hidden dangers in advance and take corresponding measures. There are water channels for cooling in the liquid-cooled shell cavity, and self-sealing joints are installed at the inlet and outlet of the water channel for the coolant to enter and exit the flow channel in the shell. Due to quality problems in the water channel during the processing (welding) process, there is a risk of leakage, and there is also the possibility of leakage at the joint installation.

[0003] At present, leak detection is performed by injecting compressed air into the inner flow channel and injecting water at the inlet and outlet joints for manual observation. After confirming that there is no leakage in the flow channel of the shell, flow resistance detection is performed to determine whether there is residual impurities blocking the water channel. This manual detection method has many problems, such as low detection efficiency, high labor intensity, difficulty in tracing quality problems, and human factors affecting the accuracy of parts leak detection. At the same time, the conductive oxidation process of the liquid-cooled shell flow channel and the leak detection and flow detection processes are currently carried out in different places, and different equipment is used for leak detection and flow detection, so there is still a problem of low process efficiency. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes an integrated system for leak detection and flow resistance detection in the flow channel of a liquid-cooled shell, including a water system; the water system includes a pressure test pump, a first electric ball valve, a first flow sensor, a pressure differential sensing module, a second electric ball valve, and a water tank connected in sequence; it also includes a multi-stage centrifugal pump connected in parallel with the pressure test pump; the first electric ball valve and the first flow sensor are connected at both ends in parallel to the third electric ball valve and the second flow sensor, and the third electric ball valve is connected in series to the second flow sensor; the two ends of the pressure differential sensing module are connected to the liquid-cooled shell parts to be detected; the pressure differential sensing module includes a pressure differential sensor group.

[0005] Furthermore, the differential pressure sensing module includes a first pressure sensor, a differential pressure sensor group, and a second pressure sensor connected in sequence; the differential pressure sensor group includes a plurality of differential pressure sensors with different measuring ranges connected in parallel.

[0006] Furthermore, the water system also includes a pressure reducing valve, a first check valve, a second check valve, a precision filter, and a filter; the pressure reducing valve, the first check valve, and the precision filter are arranged between the pressure test pump and the first electric ball valve, one end of the second check valve is connected to the connection point of the first check valve and the precision filter, and one end of the second check valve is connected to the multi-stage centrifugal pump; the filter is arranged in the water tank.

[0007] Furthermore, the water system also includes a first manual ball valve, a second manual ball valve, and a third manual ball valve; both ends of the third manual ball valve are connected to a multi-stage centrifugal pump and a water tank; both ends of the first manual ball valve are connected to the water tank and the second electric ball valve; and the second manual ball valve is connected to the water tank.

[0008] Furthermore, it also includes an electric control structure; the electric control structure includes a programmable logic controller, a host computer communication module, an analog input module, and an analog output module, the programmable logic controller, the host computer communication module, the analog input module, and the analog output module are connected in sequence, and the host computer communication module is also connected to the human-machine display screen; the values ​​of the first flow sensor and the second flow sensor are input through the analog input module; the two input ends of the analog output module are respectively connected to the first electric ball valve and the third electric ball valve; the output end of the programmable logic controller is connected to the second electric ball valve.

[0009] Furthermore, the input end of the programmable logic controller is connected to the pressure difference sensor group; the input end of the analog input module is respectively connected to the first pressure sensor and the second pressure sensor.

[0010] A method for integrated leakage detection and flow resistance detection in a flow channel of a liquid-cooled housing is also provided. The method is implemented based on the above integrated system and comprises the following steps:

[0011] Flow channel leak detection:

[0012] Close the pressure test pump, open the first electric ball valve, the third electric ball valve and the second electric ball valve, and turn on the multi-stage centrifugal pump to fill the liquid-cooled housing parts to be tested with water for N seconds; N is a preset value;

[0013] After closing the second electric ball valve, turn off the vertical multi-stage centrifugal pump, and start the pressure test pump to pressurize the water system. After the pressure of the water system reaches the set value, close the first electric ball valve and the third electric ball valve, turn off the pressure test pump, and the water system enters the pressure maintaining state;

[0014] If the pressure of the water system does not drop to the set value within the set time or there is no water seepage on the surface of the liquid cooling shell parts, the flow channels and joints in the liquid cooling shell are not leaking;

[0015] Flow resistance detection, including constant pressure differential mode:

[0016] Turn off the pressure test pump of the water system, start the multi-stage centrifugal pump, fully open the second electric ball valve, adjust the opening of the first electric ball valve or the third electric ball valve according to the set value, synchronously collect the value of the differential pressure sensor group, adjust the first electric ball valve or the third electric ball valve according to the value of the differential pressure sensor group, converge the value of the differential pressure sensor group within the set range, and judge whether the liquid-cooled shell parts under inspection are qualified according to the value of the flow sensor corresponding to the first electric ball valve or the third electric ball valve; the flow sensor corresponding to the first electric ball valve is the first flow sensor, and the flow sensor corresponding to the third electric ball valve is the second flow sensor.

[0017] Furthermore, the differential pressure sensing module of the water system further includes a first pressure sensor and a second pressure sensor, and the flow resistance detection further includes an extended mode, and the extended mode is selected when the range of the differential pressure detection of the detected shell part exceeds the range of the differential pressure sensor group, specifically including the following steps:

[0018] Select to use the first pressure sensor and the second pressure sensor combination to measure the pressure difference, fully open the second electric ball valve, and when the pressure of the water system stabilizes at the set pressure value, synchronously read the values ​​of the first pressure sensor and the second pressure sensor as the difference, adjust the second electric ball valve, adjust the first electric ball valve or the third electric ball valve, converge the pressure difference between the first pressure sensor and the second pressure sensor within the set range, and judge whether the liquid cooling shell parts are qualified according to the values ​​of the flow sensors corresponding to the first electric ball valve or the third electric ball valve; the flow sensor corresponding to the first electric ball valve is the first flow sensor, and the flow sensor corresponding to the third electric ball valve is the second flow sensor.

[0019] Furthermore, the pressure difference sensing module of the water system further includes a first pressure sensor and a second pressure sensor, and the flow resistance detection further includes a constant flow mode, specifically including the following steps:

[0020] Fully open the second electric ball valve, adjust the opening of the first electric ball valve or the third electric ball valve, collect the value of the flow sensor corresponding to the first electric ball valve or the third electric ball valve for closed-loop feedback control until it stabilizes at the set flow value, and judge whether the liquid-cooled shell parts are qualified according to the value difference between the first pressure sensor and the second pressure sensor or directly according to the value of the pressure difference sensor group; the flow sensor corresponding to the first electric ball valve is the first flow sensor, and the flow sensor corresponding to the third electric ball valve is the second flow sensor.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] (1) The present invention realizes one-time clamping of shell parts, automatically completes internal flow channel leak detection and flow resistance detection, and automatically determines whether the shell parts are leaking and whether the flow channel flow resistance meets the requirements. It solves the efficiency problem caused by the separation of leak detection and flow resistance detection of shell parts into different processes in the past, greatly improves the automation level of internal flow channel leak detection and flow detection of shell parts, and records files locally for easy traceability.

[0023] (2) The present invention adopts an automatic detection method, which automatically detects the pressure and flow resistance of the flow channel in the shell parts by comprehensively using pressure difference, pressure and flow sensors, thereby solving the limitations and complexity of manual detection and achieving data traceability. The detection scheme is efficient and reliable. (3) The present invention can perform leak detection and flow resistance detection on one part or multiple parts at a time.

[0024] (4) The present invention can be used for leak detection and flow resistance detection of other pipeline parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 2 is a structural diagram of a waterway system according to an embodiment of the present invention.

[0026] Figure 2 2 is a diagram of an electric control structure of an embodiment of the present invention.

[0027] Figure 3 Schematic diagram of a flow detection system according to an embodiment of the present invention.

[0028] The accompanying drawings are marked as follows:

[0029] Pressure test pump 1, multistage centrifugal pump 2, pressure reducing valve 3, first check valve 4, second check valve 5, precision filter 6, first electric ball valve 7, first flow sensor 8, first pressure sensor 9, first differential pressure sensor 10, second differential pressure sensor 11, third differential pressure sensor 12, fourth differential pressure sensor 13, second pressure sensor 14, second electric ball valve 15, first manual ball valve 16, second manual ball valve 17, water tank 18, filter 19, third manual ball valve 20, second flow sensor 22, third electric ball valve 23. DETAILED DESCRIPTION

[0030] The present invention adopts an automatic detection method, and automatically detects the pressure and flow resistance of the flow channel in the shell parts by comprehensively using pressure difference, pressure and flow sensors, thereby solving the limitations and complexity of manual detection, while achieving data traceability. The detection scheme is efficient and reliable. In order to facilitate understanding of the present application, the present application will be described more comprehensively with reference to the relevant drawings. The embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0032] It can be understood that the terms "first", "second", etc. used in the present application can be used in this article to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element.

[0033] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatially relative terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0034] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is transmission of electrical signals or data between the connected objects.

[0035] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0036] In order to make the purpose, technical solution and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0037] The method of this embodiment is carried out through a system, which includes a variety of solenoid valves, sensors, pressure gauges, water pumps and various electronic control devices. The detection equipment supports two working modes: leak detection mode and flow resistance detection mode. When the parts are connected to the test system, the leak detection mode is activated first: open the first electric ball valve 7 for water inlet and the second electric ball valve 15 for water return of the water system, fill the flow channel in the liquid cooling shell with deionized water through the vertical multi-stage centrifugal pump 2, and automatically close the second electric ball valve 15 for water return on the system loop. The pressure test pump 1 starts automatically. After the system pressure reaches the set leak detection pressure value, the system automatically closes the first electric ball valve 7 for water inlet, and at the same time, the system automatically closes the pressure test pump 1 and starts to maintain pressure for 15 minutes. During this period, if the pressure is less than 1.5Mpa, the system automatically starts the pressure test pump to replenish the pressure. If there is no leakage in a group of liquid cooling shells in series, it automatically enters the flow resistance detection mode. In the flow resistance detection mode, the large flow channel and the small flow channel can be activated by setting the value through the human-machine interface, and the test method can be selected as the constant pressure difference flow measurement mode or the constant flow pressure difference measurement mode. By adjusting the opening of the first electric ball valve 7 or the third electric ball valve 23 of the water system and the second electric ball valve 15 of the return water, the flow or pressure difference in and out of the liquid-cooled shell is controlled to be a fixed value, and then a group of parallel pressure difference sensors with different ranges are used to obtain the actual pressure difference value of the part or the flow value of the passage, and then detect whether the flow resistance of this group of liquid-cooled shells (in series) meets the design requirements. The upper computer system interface records the model, operator, test time, quantity and data of the test part in the local file for storage and easy traceability.

[0038] like Figure 1As shown, this embodiment integrates the two processes of leak detection and flow resistance detection of shell parts into one system, realizing the integration of leak detection and flow resistance detection; the water circuit of the system includes a pressure test pump 1, a multistage centrifugal pump 2, a pressure reducing valve 3, a first check valve 4, a second check valve 5, a precision filter 6, a first electric ball valve 7, a first flow sensor 8, a third electric ball valve 23, a second flow sensor 22, a differential pressure sensor module (a first pressure sensor 9, a second pressure sensor 14, a differential pressure sensor group (including a plurality of first differential pressure sensors with different ranges connected in parallel) 10, second differential pressure sensor 11, third differential pressure sensor 12, fourth differential pressure sensor 13), second electric ball valve 15, first manual ball valve 16, second manual ball valve 17, water tank 18, filter 19, third manual ball valve 20; wherein, first electric ball valve 7 and third electric ball valve 23 are used for water inlet, and second electric ball valve 15 is used for water outlet; pressure test pump 1, pressure reducing valve 3, first check valve 4, precision filter 6, first electric ball valve 7, first flow sensor 8, differential pressure sensor module, second electric ball valve 15, first manual ball valve 16, water tank 18, and the third manual ball valve 20 are connected in sequence, the connection point between the first check valve 4 and the precision filter 6 is also connected to the second check valve 5 and the multistage centrifugal pump 2 in sequence, and then connected to one end of the third manual ball valve 20; the other end of the third manual ball valve 20 is connected to the filter 19 arranged in the water tank 18; a second manual ball valve 17 is also arranged below the water tank 18; the first electric ball valve 7 and the first flow sensor 8 are connected in parallel to the third electric ball valve 23 and the second flow sensor 22, and the third electric ball valve 23 is connected in series to the second flow sensor 22. Sensor 22; the first pressure sensor 9, the second pressure sensor 14, and the differential pressure sensor group are connected in series, and both ends of the differential pressure sensor group are connected in parallel to the cold plate series group; the cold plate series group includes 5 cold plates (i.e., liquid-cooled shell parts) connected in series; the first manual ball valve 16, the second manual ball valve 17, and the third manual ball valve 20 are used for manual maintenance when the electric ball valve fails or the flow channel leaks; the filter 19, the pressure reducing valve 3, the first check valve 4, the second check valve 5, and the precision filter 6 are used for auxiliary functions such as filtering, pressure reducing, and checking of the water system.

[0039] like Figure 2As shown, the electrical control structure of an integrated system for leak detection and flow resistance detection of a complex internal flow channel of a liquid-cooled shell provided in this embodiment is as follows: a programmable logic controller, a host computer communication module, an analog input module, and an analog output module are connected in sequence, and the host computer communication module and the industrial control network are connected through a human-machine display screen; the four input ends of the programmable logic controller are respectively connected to the first differential pressure sensor 10, the second differential pressure sensor 11, the third differential pressure sensor 12 and the fourth differential pressure sensor 13, and the output end of the programmable logic controller is connected to the second electric ball valve 15; the four input ends of the analog input module are respectively connected to the first flow sensor 8, the second flow sensor 22, the first pressure sensor 9 and the second pressure sensor 14; the two input ends of the analog output module are respectively connected to the first electric ball valve 7 and the third electric ball valve 23; the human-machine display screen is connected to the barcode scanner through a USB interface.

[0040] This embodiment also provides an integrated method for leak detection and flow resistance detection in a flow channel of a liquid cooling housing. Figure 1 As shown, first fill the water tank 18 in the detection equipment with deionized water, the third manual ball valve 20, the first manual ball valve 16, the first electric ball valve 7 (water inlet), the third electric ball valve 23 (water inlet) and the second electric ball valve 15 (water return) are in the open state, and one or more (in series) liquid-cooled shell parts to be tested (cold plate series group) are connected in series in the detection equipment. Create a new test task in the operating software on the human-machine display screen, enter the product model, part model, operator name, test part theoretical pressure difference and flow, click Start, and the vertical multistage centrifugal pump 2 will fill the water system with water. At this time, the pressure test pump 1 in the system is in the closed state. After the water system of the system and the shell parts to be tested are filled with water (filling for 30 seconds), turn off the vertical multistage centrifugal pump 2 and close the second electric ball valve 15 (water return) at the same time. Then start the pressure test pump 1. When the system pressure reaches the set leak detection pressure value, turn off the pressure test pump 1, and at the same time, close the first electric ball valve 7 (water inlet) and the third electric ball valve 23 (water inlet), and start to maintain the pressure for 15 minutes. During the pressure maintenance process, if the set pressure value drops, it indicates that there is a leak in the series liquid cooling shell; if the pressure remains unchanged, it indicates that there is no leak and the leak detection is completed.

[0041] If there is no leakage in the shell part after the leak detection process, the system will enter the flow detection process after confirmation in the interface, keep the pressure test pump 1 in a stopped state, turn on the multi-stage centrifugal pump 2 to fill with water, and if the constant pressure difference mode is selected, the system will collect the pressure difference on both sides of the test part, fine-tune the opening of the first electric ball valve 7 or the third electric ball valve 23 according to the flow range of the test part, control the flow in and out of the liquid-cooled shell to obtain the required pressure difference, adopt the discrete PID control method to control the pressure difference within the set range, read the flow sensor feedback value and compare it with the process standard value to determine whether the test part is qualified.

[0042] If the fixed flow mode is selected, fine-tune the opening of the first electric ball valve 7 or the third electric ball valve 23 according to the flow range of the test part, open the water inlet electric ball valve and the water return electric ball valve in the system water circuit, use the closed-loop PID control flow sensor value within the set range, read the pressure difference sensor feedback value at this time, and detect whether the flow resistance value (through the flow sensor) of this group of liquid-cooled shells (in series) meets the design requirements. Figure 3 As shown, the first electric ball valve 7 is selected.

[0043] The whole process of the system is as follows:

[0044] Step 1: turn off the pressure test pump 1, open the first electric ball valve 7 and the third electric ball valve 23 for water inlet and the second electric ball valve 15 for water return to make the water system completely unblocked, and turn on the vertical multi-stage centrifugal pump 2 to fill the liquid-cooled housing to be tested with water for 30 seconds;

[0045] Step 2: When the water filling time is up, the system automatically closes the second electric ball valve 15 for water return, then closes the vertical multi-stage centrifugal pump 2, and simultaneously starts the pressure test pump 1 to pressurize the water system. When the system pressure reaches the set value, the first electric ball valve 7 and the third electric ball valve 23 are closed synchronously, and the system automatically closes the pressure test pump 1, and the water system enters the pressure maintaining state;

[0046] Step 3: If the system pressure does not drop to the set value within the set time or there is no obvious water seepage on the surface of the part, it means that the flow channel and joints in the liquid cooling shell are not leaking and meet the design requirements. Flow resistance detection is then carried out.

[0047] Flow resistance detection is divided into constant pressure difference mode, expansion mode and constant flow mode:

[0048] Step 4: Constant pressure differential mode

[0049] For the inspection of single-piece shell parts: turn off the system pressure test pump 1, start the system vertical multi-stage centrifugal pump 2, the system automatically opens the second return water electric ball valve 15 completely, and the system automatically adjusts the opening of the first water inlet electric ball valve 7 or the third water inlet electric ball valve 23 according to the set value according to the design requirements, and simultaneously collects the feedback value of the pressure difference sensor, fine-tunes the first water inlet electric ball valve 7 or the third water inlet electric ball valve 23 according to the pressure difference, and converges the value to the set pressure difference range. At this time, read the feedback value of the flow sensor and compare it with the process parameters to determine whether the part is qualified.

[0050] For the inspection of multiple shell parts: turn off the system pressure test pump 1, start the system vertical multi-stage centrifugal pump 2, the system automatically opens the second return water electric ball valve 15 completely, and automatically adjusts the opening of the first water inlet electric ball valve 7 or the third water inlet electric ball valve 23 according to the set value according to the design requirements, and simultaneously collects the feedback value of the differential pressure sensor, and fine-tunes the first water inlet electric ball valve 7 or the third electric ball valve 23 according to the pressure difference to converge the value to the set pressure difference range. The system selects the value of the differential pressure sensor of the differential pressure sensor group to be collected according to the number of parts to be inspected, and then reads the corresponding flow sensor feedback value and compares it with the process parameters to determine whether the parts are qualified.

[0051] Extended mode: If more shell parts are to be detected, considering the possibility that the range of the differential pressure sensor cannot be met, the combination of the first pressure sensor 9 and the second pressure sensor 14 is selected for differential pressure measurement, and the second electric ball valve 15 is fully opened. When the pressure stabilizes at the set pressure value, the values ​​of the first pressure sensor 9 and the second pressure sensor 14 are read synchronously for difference, and the first electric ball valve 7 (or the third electric ball valve 23) for water inlet and the second electric ball valve 15 for water return are fine-tuned to converge the differential pressure within the set differential pressure range. At this time, the corresponding flow sensor values ​​are read and compared with the process parameters to determine whether the parts are qualified. The flow sensor corresponding to the first electric ball valve 7 is the first flow sensor 8, and the flow sensor corresponding to the third electric ball valve 23 is the second flow sensor 22.

[0052] In the constant flow mode, the system automatically opens the second return electric ball valve 15 completely, adjusts the opening of the first inlet electric ball valve 7 (or the third electric ball valve 23), collects the value of the first flow sensor 8 (or the second flow sensor 22) for closed-loop feedback control until it stabilizes at the set flow value, collects the value of the first pressure sensor 9 and the second pressure sensor 14, and makes a difference, or directly collects the value of the pressure difference sensor group and compares it with the process parameters to determine whether the parts are qualified.

[0053] The present invention proposes integrated automatic detection equipment and method for leak detection and flow resistance detection in the flow channel of shell parts, which realizes one-time clamping of the shell parts, automatically completes the leak detection and flow resistance detection in the flow channel, and automatically determines whether the shell parts are leaking and whether the flow resistance of the flow channel meets the requirements. It solves the efficiency problem caused by the separation of leak detection and flow resistance detection of shell parts into different processes in the past, greatly improves the automation level of leak detection and flow detection in the flow channel of shell parts, and records files locally at the same time for easy traceability.

[0054] The present invention can perform leak detection and flow resistance detection on one part or multiple parts at a time.

[0055] The invention can be used for leak detection and flow resistance detection of other pipeline parts.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated system for leak detection and flow resistance detection in a flow channel of a liquid-cooled housing, characterized in that: The invention comprises a water circuit system; the water circuit system comprises a pressure test pump (1), a first electric ball valve (7), a first flow sensor (8), a pressure difference sensing module, a second electric ball valve (15), and a water tank (18) which are connected in sequence; and further comprises a multistage centrifugal pump (2) which is connected in parallel with the pressure test pump (1); two ends of the first electric ball valve (7) and the first flow sensor (8) are connected in parallel with a third electric ball valve (23) and a second flow sensor (22), and the third electric ball valve (23) is connected in series with the second flow sensor (22); two ends of the pressure difference sensing module are connected with liquid cooling housing parts to be detected; and the pressure difference sensing module comprises a pressure difference sensor group.

2. The integrated system for leak detection and flow resistance detection in the flow channel of a liquid-cooled housing according to claim 1, characterized in that: The differential pressure sensing module comprises a first pressure sensor (9), a differential pressure sensor group, and a second pressure sensor (14) which are connected in sequence; the differential pressure sensor group comprises a plurality of differential pressure sensors with different measuring ranges which are connected in parallel.

3. The integrated system for leak detection and flow resistance detection in the flow channel of a liquid-cooled housing according to claim 1, characterized in that: The water system further comprises a pressure reducing valve (3), a first check valve (4), a second check valve (5), a precision filter (6), and a filter (19); the pressure reducing valve (3), the first check valve (4), and the precision filter (6) are arranged between the pressure test pump (1) and the first electric ball valve (7); one end of the second check valve (5) is connected to the connection point between the first check valve (4) and the precision filter (6); and one end of the second check valve (5) is connected to the multi-stage centrifugal pump (2); and the filter (19) is arranged in the water tank (18).

4. The integrated system for leak detection and flow resistance detection in the flow channel of a liquid-cooled housing according to claim 1, characterized in that: The water system further comprises a first manual ball valve (16), a second manual ball valve (17), and a third manual ball valve (20); both ends of the third manual ball valve (20) are connected to the multistage centrifugal pump (2) and the water tank (18); both ends of the first manual ball valve (16) are connected to the water tank (18) and the second electric ball valve (15); and the second manual ball valve (17) is connected to the water tank (18).

5. The integrated system for leak detection and flow resistance detection in the flow channel of a liquid-cooled housing according to claim 1, characterized in that: It also includes an electric control structure; the electric control structure includes a programmable logic controller, a host computer communication module, an analog input module, and an analog output module, which are connected in sequence, and the host computer communication module is also connected to a human-machine display screen; the values ​​of the first flow sensor (8) and the second flow sensor (22) are input through the analog input module; the two input ends of the analog output module are respectively connected to the first electric ball valve (7) and the third electric ball valve (23); and the output end of the programmable logic controller is connected to the second electric ball valve (15).

6. The integrated system for leak detection and flow resistance detection in the flow channel of a liquid-cooled housing according to claims 2 and 5, characterized in that: The input end of the programmable logic controller is connected to the pressure difference sensor group; the input end of the analog input module is respectively connected to the first pressure sensor (9) and the second pressure sensor (14).

7. An integrated method for leak detection and flow resistance detection in a flow channel of a liquid cooling shell, characterized in that: The method is implemented based on the integrated system described in any one of claims 1 to 6, and comprises the following steps: Flow channel leak detection: The pressure test pump (1) is closed, the first electric ball valve (7), the third electric ball valve (23) and the second electric ball valve (15) are opened, and the multi-stage centrifugal pump (2) is opened to fill the liquid-cooled housing parts to be tested with water for N seconds; N is a preset value; After closing the second electric ball valve (15), the vertical multi-stage centrifugal pump (2) is turned off, and the pressure test pump (1) is started synchronously to pressurize the water system. After the pressure of the water system reaches a set value, the first electric ball valve (7) and the third electric ball valve (23) are closed synchronously, and the pressure test pump (1) is turned off, and the water system enters a pressure-maintaining state; If the pressure of the water system does not drop to the set value within the set time or there is no water seepage on the surface of the liquid cooling shell parts, the flow channels and joints in the liquid cooling shell are not leaking; Flow resistance detection, including constant pressure differential mode: The pressure test pump (1) of the water system is turned off, the multistage centrifugal pump (2) is started, the second electric ball valve (15) is fully opened, the opening of the first electric ball valve (7) or the third electric ball valve (23) is adjusted according to the set value, the value of the pressure difference sensor group is collected synchronously, the first electric ball valve (7) or the third electric ball valve (23) is adjusted according to the value of the pressure difference sensor group, the value of the pressure difference sensor group is converged to the set range, and the value of the flow sensor corresponding to the first electric ball valve (7) or the third electric ball valve (23) is judged whether the liquid cooling shell part being tested is qualified; the flow sensor corresponding to the first electric ball valve (7) is the first flow sensor (8), and the flow sensor corresponding to the third electric ball valve (23) is the second flow sensor (22).

8. The integrated method for leak detection and flow resistance detection in a flow channel of a liquid-cooled housing according to claim 7, characterized in that: The differential pressure sensing module of the water system further comprises a first pressure sensor (9) and a second pressure sensor (14), and the flow resistance detection further comprises an extended mode, wherein the extended mode is selected when the range of the differential pressure detection of the detected housing part exceeds the range of the differential pressure sensor group, and specifically comprises the following steps: A first pressure sensor (9) and a second pressure sensor (14) are selected to perform differential pressure measurement in combination, and the second electric ball valve (15) is fully opened. When the pressure of the water system is stabilized at a set pressure value, the values ​​of the first pressure sensor (9) and the second pressure sensor (14) are synchronously read as a difference, and the second electric ball valve (15) is adjusted, and the first electric ball valve (7) or the third electric ball valve (23) is adjusted to converge the differential pressure between the first pressure sensor (9) and the second pressure sensor (14) within a set range. Whether the liquid cooling housing parts are qualified is determined based on the value of the flow sensor corresponding to the first electric ball valve (7) or the third electric ball valve (23); the flow sensor corresponding to the first electric ball valve (7) is the first flow sensor (8), and the flow sensor corresponding to the third electric ball valve (23) is the second flow sensor (22).

9. The integrated method for leak detection and flow resistance detection in a flow channel of a liquid-cooled housing according to claim 7, characterized in that: The differential pressure sensing module of the water system further comprises a first pressure sensor (9) and a second pressure sensor (14), and the flow resistance detection further comprises a constant flow mode, specifically comprising the following steps: The second electric ball valve (15) is fully opened, the opening of the first electric ball valve (7) or the third electric ball valve (23) is adjusted, the value of the flow sensor corresponding to the first electric ball valve (7) or the third electric ball valve (23) is collected to perform closed-loop feedback control until the flow value is stabilized at the set flow value, and whether the liquid cooling housing parts are qualified is judged based on the value difference between the first pressure sensor (9) and the second pressure sensor (14) or directly based on the value of the pressure difference sensor group; the flow sensor corresponding to the first electric ball valve (7) is the first flow sensor (8), and the flow sensor corresponding to the third electric ball valve (23) is the second flow sensor (22).

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