Six-station impurity internal corrosion test bench

Abstract

The utility model discloses a six station impurity internal corrosion test bench, including the shell still includes medium jar, the number of medium jar is six, the medium jar all installs in the inside of shell, all be equipped with liquid inlet pipe way at the liquid inlet of medium jar upside wall, the upper end of liquid inlet pipe way all has electric liquid inlet valve and electromagnetic flowmeter from top to bottom all in series, the upper end of liquid inlet pipe way all is installed with liquid inlet temperature sensor, and the temperature probe of liquid inlet temperature sensor all penetrates the outer arc wall of rear side adjacent liquid inlet pipe way, the liquid outlet of medium jar downside wall all is equipped with liquid outlet pipe way no.

Description

Technical Field

[0001] This utility model relates to the field of automotive air conditioning system testing technology, specifically a six-station internal corrosion test bench for impurities. Background Technology

[0002] As the automotive industry rapidly evolves towards higher efficiency and longer lifespan, the reliability and durability of automotive air conditioning systems have become core indicators of product competitiveness. In actual operation, critical components such as evaporators and condensers are constantly exposed to coolants containing impurities like sediment and metal debris (such as ethylene glycol and DEXCOOL coolants), making them prone to internal corrosion failure. This directly impacts the heat exchange efficiency and lifespan of the air conditioning system. Therefore, simulating the internal corrosion process under actual operating conditions using specialized testing equipment to accurately assess component corrosion resistance has become a core requirement in automotive air conditioning R&D and quality control. This is crucial for shortening product verification cycles and reducing after-sales risks.

[0003] Currently, most mainstream internal corrosion testing equipment in the industry is based on a single-station or dual-station architecture. Its core consists of a media storage tank, a circulating pump, a basic temperature control device, and simple monitoring components. During testing, the prepared corrosive medium is first injected into the storage tank. A heating element raises the medium to a set temperature, and then the circulating pump drives the medium to form a closed loop between the pipeline and the test piece. Existing technologies have several problems: most equipment is designed with a single station or a few stations, resulting in low testing efficiency. They also lack specialized circulation designs for media containing impurities (such as molding sand mixtures smaller than 0.6mm), which can easily lead to pipeline blockage or wear, and fail to simulate actual working conditions. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a six-station internal corrosion test bench for impurities, consisting of 6 sets of parallel medium tanks and pipeline systems, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a six-station internal corrosion test bench for impurities, including an outer shell and a medium tank; The medium tanks consist of six containers, all installed inside the outer casing. Each container has an inlet pipe at its upper sidewall inlet. An electric inlet valve and an electromagnetic flow meter are connected in series at the upper end of each inlet pipe. An inlet temperature sensor is installed at the upper end of each inlet pipe, and the temperature probe of each inlet temperature sensor penetrates the outer arc wall of the adjacent rear inlet pipe. Each container has an outlet pipe at its lower sidewall outlet. An outlet pipe is fixedly connected to the lower end of each outlet pipe. A variable frequency pump is connected in series at the connection point between outlet pipes one and two. Outlet pipe two is connected to the inlet pipes. An electric outlet valve is connected in series at the lower end of each outlet pipe. An outlet pressure and temperature sensor is installed in the middle of the outer arc surface of each outlet pipe, and the probe of each outlet pressure and temperature sensor penetrates the outer arc wall of the adjacent rear outlet pipe. The system also includes a control panel, which is installed on the right side of the housing. The input end of the control panel is electrically connected to an external power source. The input ends of the electric outlet valve, electric inlet valve, and frequency converter pump are all electrically connected to the output end of the control panel. The electromagnetic flowmeter, inlet temperature sensor, and outlet pressure and temperature sensor are all bidirectionally electrically connected to the control panel.

[0006] Furthermore, each of the medium tanks is equipped with an electric heater inside, and the input end of the electric heater is electrically connected to the output end of the control panel for heating the medium.

[0007] Furthermore, a cooling jacket is installed in the middle of the outer arc surface of the liquid outlet pipe for cooling the medium.

[0008] Furthermore, the inlet pipe, outlet pipe one, and outlet pipe two are all large-diameter pipes with a nominal diameter ≥ mm, which can significantly reduce the flow resistance of the impurity-containing medium during transportation and reduce the risk of impurity deposition and pipe blockage.

[0009] Furthermore, each of the two outlet pipes is equipped with a sampling pipe at its lower end, and a sampling valve is connected in series at the front end of each sampling pipe. This allows for convenient extraction of media samples from each station without interrupting the operation of the overall circulation system.

[0010] Furthermore, an alarm level gauge is installed on the left side inside the housing. The alarm level gauge is installed in conjunction with six medium tanks and is bidirectionally electrically connected to the control panel to monitor the liquid level status of each medium tank in real time.

[0011] Furthermore, each of the replenishment ports on the upper side wall of the medium tank is equipped with a replenishment pipeline, and each replenishment pipeline is connected in series with a replenishment valve, which can be used to add test medium to the medium tank.

[0012] Compared with the prior art, the beneficial effects of this utility model are: Through six-station synchronous parallel testing, efficiency is increased by 6 times, significantly shortening the product development cycle; a sand impurity circulation system is adopted in conjunction with a large-diameter pipeline with a nominal diameter ≥20mm to prevent impurity blockage, accurately simulating actual corrosion conditions, supporting multiple media, and adapting to corrosion tests of different standards; temperature control accuracy is ±2℃, flow accuracy is 0.5 grade, and pressure accuracy is 0.25 grade, meeting the requirements of high-precision testing. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure on the right side of the outer shell of this utility model; Figure 3 This is a structural schematic diagram of the left side cross-section of the outer casing of this utility model; Figure 4 This is a schematic diagram of the front plane of the six workstations of this utility model; Figure 5 This is a partial structural diagram of one workstation of this utility model.

[0014] In the diagram: 1. Medium tank, 101. Inlet pipe, 2. Outlet pipe one, 3. Variable frequency pump, 4. Electric outlet valve, 5. Sampling pipe, 6. Sampling valve, 7. Electric inlet valve, 8. Inlet temperature sensor, 9. Electromagnetic flow meter, 10. Electric heater, 11. Cooling jacket, 12. Outlet pressure and temperature sensor, 13. Alarm level gauge, 14. Replenishment pipe, 15. Replenishment valve, 16. Outlet pipe two, 17. Housing, 18. Control panel. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-5 This embodiment provides a technical solution: a six-station internal corrosion test bench for impurities, including a shell 17 (the front side wall of the shell 17 is hinged to a sampling door, and a closing lock is provided between the end of the sampling door away from the hinge and the front side wall of the shell 17, and the closing lock is a commonly used closing lock in the prior art).

[0017] This includes six medium tanks 1 installed inside the outer casing 17. Each medium tank 1 has a replenishment pipe 14 at its replenishment port on the upper side wall, with the front end of each replenishment pipe 14 penetrating the front side wall of the outer casing 17. Each replenishment pipe 14 is connected in series with a replenishment valve 15 at its front end. Each medium tank 1 has an inlet pipe 101 at its inlet port on the upper side wall, with an electric inlet valve 7 and an electromagnetic flowmeter 9 connected in series from top to bottom at the upper end of each inlet pipe 101. Each inlet pipe 101 has an inlet temperature sensor 8 installed at its upper end, with the temperature probe of the inlet temperature sensor 8 penetrating the rear... The outer arc wall of the adjacent liquid inlet pipe 101 and the outlet of the lower side wall of the medium tank 1 are provided with liquid outlet pipe 1 2. The lower end of liquid outlet pipe 1 2 is fixedly connected to liquid outlet pipe 2 16. A variable frequency pump 3 is connected in series at the connection between liquid outlet pipe 1 2 and liquid outlet pipe 2 16. Liquid outlet pipe 2 16 is connected to liquid inlet pipe 101. An electric liquid outlet valve 4 is connected in series at the lower end of liquid outlet pipe 2 16. A liquid outlet pressure and temperature sensor 12 is installed in the middle of the outer arc surface of liquid outlet pipe 2 16. The probe of liquid outlet pressure and temperature sensor 12 penetrates the outer arc wall of the adjacent liquid outlet pipe 2 16 on the rear side.

[0018] Among them, the inlet pipe 101, the outlet pipe 12 and the outlet pipe 26 are all large-diameter pipes with a nominal diameter ≥ 20 mm.

[0019] Each of the sampling ports at the lower end of the liquid outlet pipe 16 is equipped with a sampling pipe 5, and a sampling valve 6 is connected in series at the front end of each sampling pipe 5.

[0020] The system also includes a control panel 18, which is installed on the right side of the housing 17. The input terminals of the control panel 18 are electrically connected to an external power source. The input terminals of the electric outlet valve 4, the electric inlet valve 7, and the variable frequency pump 3 are all electrically connected to the output terminals of the control panel 18. The electromagnetic flowmeter 9, the inlet temperature sensor 8, and the outlet pressure and temperature sensor 12 are all bidirectionally electrically connected to the control panel 18.

[0021] An alarm level gauge 13 is installed inside the left end of the outer casing 17. The alarm level gauge 13 is installed in conjunction with six medium tanks 1 (the six medium tanks 1 share one alarm level gauge 13). The alarm level gauge 13 is bidirectionally electrically connected to the control panel 18. The alarm level gauge 13 monitors the liquid level of each medium tank in real time. When the liquid level reaches the preset standard, it feeds back to the control panel 18 to indicate that the filling is complete. If the liquid level is too low, an alarm is triggered to prevent the risk of dry burning during subsequent operation.

[0022] The medium tank 1 is equipped with an electric heater 10. The input end of the electric heater 10 is electrically connected to the output end of the control panel 18. The outer arc surface of the liquid outlet pipe 2 is equipped with a cooling jacket 11. The front end of the cooling jacket 11 is equipped with a circulation pipe. The front end of the circulation pipe penetrates the front side wall of the outer shell 17. The front end of the cooling pipe is connected in series with a valve.

[0023] The working principle of this utility model is as follows: Manually open the replenishment valve 15 to add the test medium (water, ethylene glycol, DEXCOOL coolant, or a mixed corrosion solution containing 0.35mm / 0.6mm molding sand can be configured as needed) to six independent medium tanks 1 through the replenishment pipeline. The alarm level gauge 13 monitors the liquid level of each medium tank in real time. When the liquid level reaches the preset standard, feedback is sent to the control panel 18 to indicate that the replenishment is complete. If the liquid level is too low, an alarm is triggered to prevent the risk of dry burning during subsequent operation. The test parameters for each station are set through the control panel 18, including the medium temperature (RT+10~12). The control panel 18, with PLC as its core, synchronizes parameter instructions to each execution component. The control panel 18 sends signals to open the electric inlet valve 7, the electric outlet valve 4, and the frequency converter pump 3. The frequency converter pump 3 drives the medium to flow out from the outlet pipe 2 at the bottom of the medium tank 1, and then to the inlet pipe 101 through the outlet pipe 16, and finally back to the medium tank 1, forming a closed loop. The circulation system of the six stations operates independently and the parameters do not interfere with each other. The inlet pipe 101, outlet pipe 1 2, and outlet pipe 2 16 all adopt a large-diameter pipe design with a nominal diameter ≥20mm. Combined with the chemical-grade corrosion-resistant variable frequency pump 3, it can effectively avoid pipe blockage or component wear caused by molding sand impurities below 0.6mm, and accurately simulate the impurity corrosion conditions in actual operation. Electromagnetic flowmeter 9 (accuracy class 0.5) collects the medium flow data of the inlet pipeline in real time and feeds it back to control panel 18. Inlet temperature sensor 8 (range -70~250℃, Class A) and outlet pressure and temperature sensor 12 (pressure accuracy class 0.25) monitor the temperature and pressure parameters of the medium inlet and outlet respectively, realizing full-process operating condition monitoring. When the inlet temperature sensor 8 detects that the medium temperature is lower than the set value, the control panel 18 starts the electric heater 10 in the medium tank 1 (a titanium tube heat exchanger driven by an SCR power adjustment module). Through stepless adjustment of the SCR power, the medium temperature is steadily increased, avoiding local overheating that could affect the accuracy of the test. If the medium temperature is higher than the set value, the control panel 18 controls the water pump connected to the circulation pipe at the front end of the cooling jacket 11 to start the cooling water circulation. The cooling jacket 11 and the outlet pipe 2 exchange heat fully, quickly reducing the medium temperature. The pressure sensor on the cooling jacket monitors the cooling water pressure in real time to ensure heat exchange efficiency. Through the real-time feedback from the inlet temperature sensor 8, the system forms a closed-loop control. When the temperature fluctuation is <±0.5℃ / 10min, the stability judgment mechanism is triggered to maintain the temperature control accuracy of ±2℃, meeting the requirements of high-precision testing. During the test, the sampling door can be opened, and media samples from each station can be extracted through sampling pipeline 5 and sampling valve 6 for offline analysis of corrosion degree and media status without interrupting the overall circulation.

[0024] It is worth noting that the variable frequency pump 3 disclosed in the above embodiments can be model TP80-50 / 2, the electric outlet valve 4 and the electric inlet valve 7 can both be model Emerson ASCO8320G174, the inlet temperature sensor 8 can be model WZP-230, the electromagnetic flowmeter 9 can be model AXF050G, the outlet pressure and temperature sensor 12 can be model MS8607-02BA01, the alarm level gauge 13 can be model JYB-KO-Y2W1GF, the control panel 18 is a PLC integrated control panel, the touch screen model is TPC1061Hi, the PLC model is S7-1200, and the control panel 18 controls the operation of the variable frequency pump 3, the electric outlet valve 4, the electric inlet valve 7, the inlet temperature sensor 8, the electromagnetic flowmeter 9, the electric heater 10 and the outlet pressure and temperature sensor 12 using methods commonly used in the prior art.

[0025] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A six-station test bench for internal corrosion of impurities, comprising a housing (17), characterized in that: It also includes a medium tank (1); There are six medium tanks (1), all of which are installed inside the outer shell (17). Each medium tank (1) has an inlet pipe (101) at the inlet port on the upper side wall. An electric inlet valve (7) and an electromagnetic flow meter (9) are connected in series from top to bottom at the upper end of each inlet pipe (101). An inlet temperature sensor (8) is installed at the upper end of each inlet pipe (101). The temperature probe of the inlet temperature sensor (8) penetrates the outer arc wall of the adjacent inlet pipe (101) on the rear side. Each medium tank (1) has an outlet port on the lower side wall. The lower end of the first (2) outlet pipe is fixedly connected to the second (16) outlet pipe. A variable frequency pump (3) is connected in series at the connection between the first (2) outlet pipe and the second (16) outlet pipe. The second (16) outlet pipe is connected to the inlet pipe (101). An electric outlet valve (4) is connected in series at the lower end of the second (16) outlet pipe. An outlet pressure and temperature sensor (12) is installed in the middle of the outer arc surface of the second (16) outlet pipe. The probe of the outlet pressure and temperature sensor (12) penetrates the outer arc wall of the adjacent outlet pipe (16) on the rear side. Among them, there is also a control panel (18), which is installed on the right side of the housing (17). The input end of the control panel (18) is electrically connected to an external power source. The input ends of the electric outlet valve (4), the electric inlet valve (7) and the frequency converter pump (3) are all electrically connected to the output end of the control panel (18). The electromagnetic flow meter (9), the inlet temperature sensor (8) and the outlet pressure and temperature sensor (12) are all bidirectionally electrically connected to the control panel (18).

2. The six-station internal impurity corrosion test bench according to claim 1, characterized in that: Each of the medium tanks (1) is equipped with an electric heater (10), and the input end of the electric heater (10) is electrically connected to the output end of the control panel (18).

3. The six-station internal impurity corrosion test bench according to claim 1, characterized in that: Cooling jackets (11) are installed in the middle of the outer arc surface of the liquid outlet pipe (2).

4. The six-station internal impurity corrosion test bench according to claim 1, characterized in that: The inlet pipe (101), outlet pipe one (2) and outlet pipe two (16) are all large-diameter pipes with a nominal diameter ≥ 20 mm.

5. The six-station internal impurities corrosion test bench according to claim 1, characterized in that: Each of the two outlet pipes (16) is equipped with a sampling pipe (5) at the sampling port, and a sampling valve (6) is connected in series at the front end of each sampling pipe (5).

6. The six-station internal impurities corrosion test bench according to claim 1, characterized in that: An alarm level gauge (13) is installed on the left side inside the outer casing (17). The alarm level gauge (13) is installed in conjunction with six medium tanks (1). The alarm level gauge (13) is bidirectionally electrically connected to the control panel (18).

7. The six-station internal impurities corrosion test bench according to claim 1, characterized in that: The replenishment port on the upper side wall of the medium tank (1) is provided with a replenishment pipeline (14), and a replenishment valve (15) is connected in series at the front end of the replenishment pipeline (14).

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