Cleanliness testing device for air inlet and outlet hoses of filter intake system

Abstract

This utility model discloses a test device for the cleanliness of the inlet and outlet hoses of a filter intake system, belonging to the field of filter component testing. Addressing the problems of low precision in controlling the frequency and amplitude of manual shaking and poor efficiency in cleaning agent recovery and impurity collection in existing technologies, this device achieves precise control of shaking parameters through the collaboration of a pneumatic control module and an electronic control module. The pneumatic control module includes an air source, a pressure regulating valve, a pneumatic solenoid valve, and an adjustable stroke cylinder; the electronic control module includes a controller, a time relay, and a counter. This utility model also integrates an automatic extraction and grading filtration system, including a storage tank, a delivery pump, multi-stage filter membranes, and a recovery pump, to automatically fill and recover the cleaning agent and grade impurities. This utility model requires no manual intervention, significantly improving the consistency and efficiency of test results, strictly meeting the requirements of ISO16232-2018 standard, and is suitable for the cleanliness testing of the outlet hoses of passenger vehicle intake systems.

Description

Technical Field

[0001] This utility model relates to the field of testing of filter-related components, and in particular to the technology for testing the cleanliness of inlet and outlet air hoses. Background Technology

[0002] Intake hoses and exhaust hoses are components of the intake system of fuel-powered vehicles. Their main function is to deliver clean, dry, sufficient, and stable air to the engine to meet its needs, prevent impurities and large dust particles in the air from entering the engine combustion chamber and causing abnormal engine wear, and improve engine life.

[0003] The cleanliness of vehicle components directly affects engine quality. Therefore, as a quantitative technical indicator, accurate and effective testing of component cleanliness is crucial, and extracting contaminants from component surfaces is the primary step in cleanliness testing. The ISO 16232-2018 standard, "Cleanliness of Road Vehicle Components and Systems," requires the use of a shaking method for extracting contaminants from cavities such as exhaust hoses, which can be performed manually or automatically. Manual shaking, performed by hand, requires a frequency of 1Hz and an amplitude of 30cm, which is difficult to control accurately in practice. Furthermore, the cleaning agent inside the cavity is inconvenient to pour out after the test, and impurities are not easily collected on the filter membrane. Utility Model Content

[0004] The purpose of this invention is to provide a test device for the cleanliness of the air inlet and outlet hoses of a filter intake system, which solves the problem of poor consistency in testing or measurement caused by the uncontrollable frequency / amplitude in the prior art.

[0005] To achieve the above objectives, the filter inlet air system inlet and outlet air hose cleanliness testing device of this utility model includes a pneumatic control module, an electrical control module, and tooling components.

[0006] The pneumatic control module includes an air source, a pressure regulating valve, a pneumatic solenoid valve, and an adjustable stroke cylinder. The air source is connected to the input end of the pressure regulating valve through a gas pipeline, and the output end of the pressure regulating valve is connected to the air inlet of the pneumatic solenoid valve. The two working ports of the pneumatic solenoid valve are respectively connected to the front and rear chambers of the adjustable stroke cylinder through pipelines to drive the piston rod to reciprocate in the left and right directions.

[0007] The electronic control module includes a time relay and a counter. The time relay is electrically connected to the pneumatic solenoid valve, and the counter is electrically connected to the time relay.

[0008] The tooling assembly is fixed to the front end of the piston rod of the adjustable stroke cylinder and is used to clamp and seal the test piece, so that the test piece moves back and forth synchronously with the piston rod.

[0009] The pneumatic solenoid valve is a two-position five-way directional valve, and a throttle valve is provided at its exhaust port.

[0010] The electronic control module also includes a controller, which is electrically connected to a time relay, a counter, and a pneumatic solenoid valve.

[0011] It also includes an automatic extraction and grading filtration system, which includes a storage tank, a transfer pump, a system filter, a regulating valve, a pressure gauge, a flow meter, a filtrate collection tank, a shut-off valve, a filter membrane, and a recovery pump 16;

[0012] The outlet of the storage tank is connected in sequence to the delivery pump, system filter, regulating valve and flow meter through a pipeline. The pipeline between the regulating valve 4 and the flow meter is provided with the flow meter. The output end of the flow meter is connected to the inlet of the tooling assembly through a pipeline.

[0013] The outlet of the tooling assembly is connected to the filtrate collection tank via a pipeline. The bottom of the filtrate collection tank is connected to the input end of the filter membrane via a shut-off valve. The output end of the filter membrane is connected to the return port of the storage tank via a recovery pump 16.

[0014] The filter membrane is a detachable filter membrane assembly with at least two stages connected in series, and the pore size of each stage of the filter membrane decreases sequentially along the direction of cleaning agent flow.

[0015] This utility model has the following advantages:

[0016] By coordinating the pneumatic control module and the electronic control module, precise control of the shaking frequency (1Hz), amplitude (30cm), and number of shakes can be achieved, replacing manual shaking and solving the problem of poor test consistency caused by uncontrollable frequency / amplitude in existing technologies.

[0017] The amplitude is adjusted by controlling the piston rod speed of the adjustable stroke cylinder through adjusting the throttle valve opening. The combination of the throttle valve and the pressure regulating valve enables stepless amplitude adjustment, meeting the amplitude requirements of different testing standards (e.g., 30cm ± 2cm) and improving the versatility of the device.

[0018] By integrating control with a controller, parameters can be digitally set and operated, reducing manual intervention and further improving the accuracy and efficiency of the test.

[0019] The automatic extraction and grading filtration system enables automatic filling and recovery of cleaning agents and graded collection of impurities (using filter membranes of different pore sizes), solving the problems of tedious manual liquid pouring and inaccurate impurity collection, and improving experimental efficiency.

[0020] Graded filtration enables precise separation of impurities of different particle sizes, facilitating subsequent quantitative analysis of cleanliness and meeting the requirements of ISO16232-2018 standard for impurity classification. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Summary of component names and corresponding reference numerals:

[0023] 1. Storage tank; 2. Transfer pump; 3. System filter; 4. Regulating valve; 5. Pressure gauge; 6. Flow meter; 7. Test piece; 8. Filtrate collection tank; 9. Shut-off valve; 10. Filter membrane; 11. Adjustable stroke cylinder; 12. Pneumatic solenoid valve; 13. Counter; 14. Pressure regulating valve; 15. Air source; 16. Recovery pump. Detailed Implementation

[0024] like Figure 1 As shown, the filter inlet air system inlet and outlet air hose cleanliness test device of this utility model includes a pneumatic control module, an electrical control module and tooling components;

[0025] In this utility model, the direction is defined as follows: the reciprocating motion direction of the piston rod of the adjustable stroke cylinder 11 is the left and right direction, the end of the piston rod of the cylinder where the tooling assembly is located is the "front", the fixed end of the cylinder body is the "rear", and the horizontal direction perpendicular to the left and right direction is the "up and down" direction (the side where the tooling assembly is located is the "up").

[0026] The pneumatic control module includes an air source 15, a pressure regulating valve 14, a pneumatic solenoid valve, and an adjustable stroke cylinder 11. The air source 15 is connected to the input end of the pressure regulating valve 14 through a gas pipeline. The output end of the pressure regulating valve 14 is connected to the air inlet of the pneumatic solenoid valve. The two working ports of the pneumatic solenoid valve are respectively connected to the front chamber and the rear chamber of the adjustable stroke cylinder 11 through pipelines to drive the piston rod to reciprocate in the left and right directions.

[0027] The electronic control module includes a time relay and a counter 13. The time relay is electrically connected to the pneumatic solenoid valve to control its commutation frequency, and the counter 13 is electrically connected to the time relay to set and count the number of shaking.

[0028] The tooling assembly is fixed to the front end of the piston rod of the adjustable stroke cylinder 11, and is used to clamp and seal the test piece 7, so that the test piece 7 moves back and forth synchronously with the piston rod.

[0029] The tooling components are matched with specific models of inlet and outlet air hoses, which is a standard technology and is not shown in the figure. Through the collaboration of the pneumatic control module and the electronic control module, precise control of the shaking frequency (1Hz), amplitude (30cm), and number of times is achieved, replacing manual shaking and solving the problem of poor test consistency caused by uncontrollable frequency / amplitude in existing technologies.

[0030] The pneumatic solenoid valve is a two-position five-way directional valve with a throttle valve at its exhaust port. The opening of the throttle valve is adjusted to control the piston rod speed of the adjustable stroke cylinder 11, thereby adjusting the amplitude. Through the cooperation of the throttle valve and the pressure regulating valve 14, stepless amplitude adjustment is achieved, meeting the amplitude requirements of different testing standards (e.g., 30cm ± 2cm), and improving the versatility of the device.

[0031] The electrical control module also includes a controller, which is electrically connected to a time relay, a counter 13, and a pneumatic solenoid valve, respectively, for presetting the shaking frequency, amplitude parameters, and number of shaking cycles. The controller uses a microcontroller (including a PLC) or integrated circuit, which is conventional technology and will not be described in detail.

[0032] By integrating control with a controller, parameters can be digitally set and operated, reducing manual intervention and further improving the accuracy and efficiency of the test.

[0033] It also includes an automatic extraction and grading filtration system, which includes a storage tank 1, a transfer pump 2, a system filter 3, a regulating valve 4, a pressure gauge 5, a flow meter 6, a filtrate collection tank 8, a shut-off valve 9, a filter membrane 10, and a recovery pump 16.

[0034] The outlet of the storage tank 1 is connected in sequence to the delivery pump 2, system filter 3, regulating valve 4, and flow meter 6 via pipelines. A pressure gauge 5 is installed on the pipeline between the regulating valve 4 and the flow meter 6. The output end of the flow meter 6 is connected to the inlet of the tooling assembly via a pipeline.

[0035] The outlet of the tooling assembly is connected to the filtrate collection tank 8 via a pipeline. The bottom of the filtrate collection tank 8 is connected to the input end of the filter membrane 10 via a shut-off valve 9. The output end of the filter membrane 10 is connected to the return port of the storage tank 1 via a recovery pump 16.

[0036] The automatic extraction and grading filtration system enables automatic filling and recovery of cleaning agents and graded collection of impurities (using filter membranes of different pore sizes), solving the problems of tedious manual liquid pouring and inaccurate impurity collection, and improving experimental efficiency.

[0037] The filter membrane 10 is a detachable filter membrane assembly with at least two stages connected in series. The pore size of each filter membrane decreases sequentially along the direction of cleaning agent flow (e.g., 5μm, 1μm), and different filter membranes intercept impurities of different sizes. Staged filtration achieves precise separation of impurities of different particle sizes, facilitating subsequent quantitative analysis of cleanliness and meeting the requirements of ISO 16232-2018 standard for impurity classification.

[0038] The working process of this utility model includes:

[0039] I. Testing Preparation Stage

[0040] 1. Device Connection and Parameter Setting

[0041] The air intake system outlet hose (test component 7) is fixed by the tooling assembly and connected to the liquid inlet pipe (connected to the outlet end of the regulating valve 4) and the liquid outlet pipe (connected to the inlet end of the filter liquid collection tank 8).

[0042] Inject sufficient test cleaning agent into the storage tank 1, check whether the system filter 3 and filter membrane 10 (graded filtration assembly) are installed in place, and close the shut-off valve 9.

[0043] Set the parameters of the pneumatic and electronic control device: preset the shaking frequency (1Hz) through the time relay, set the shaking number through the counter 13, and adjust the driving force of the cylinder 11 by adjusting the pressure regulating valve 14.

[0044] 2. Air venting and filling preparation

[0045] Start pump 2. After the cleaning agent is filtered by system filter 3, it enters the interior of the test piece 7 through regulating valve 4 (to regulate flow rate) and flow meter 6 (to monitor flow rate), gradually purging the air in the cavity (excess cleaning agent is temporarily stored in the filtrate collection tank 8 through the outlet pipe).

[0046] After the test piece 7 is completely filled with cleaning agent, turn off pump 2 to complete the pre-test filling.

[0047] II. Shaking Detection Process Stage

[0048] The solenoid valve 12 of the pneumatic control module is activated, and the air source 15 drives the cylinder 11 to reciprocate left and right through the pressure regulating valve 14. This causes the test piece 7 to shake at a preset frequency (1Hz) and number of times, simulating the vibration state of a hose during the operation of a passenger vehicle. This causes impurities attached to the inner wall to detach and mix into the cleaning agent. The counter 13 records the number of shaking times in real time, and stops shaking when the set value is reached.

[0049] III. Cleaning Agent Recovery Stage

[0050] 1. Open the shut-off valve 9 and start the recovery pump on the pipeline between the filter membrane 10 and the storage tank 1 to extract the cleaning agent containing impurities from the chamber of the test piece 7 and the filtrate collection tank 8.

[0051] 2. The cleaning agent passes through the filter membrane 10 in sequence (filtering impurities according to particle size classification). The impurities are retained on the filter membrane 10. The purified cleaning agent is pumped into the storage tank 1 by the recovery pump to complete the recycling.

[0052] IV. Device reset and status check in preparation for the next test.

[0053] After recycling is complete, turn off the recycling pump and shut-off valve 9, remove and replace the filter membrane 10 (collect impurities for cleanliness testing), and clean the filtrate collection tank 8.

[0054] Check the cleaning agent level and cleanliness in the storage tank 1. If it is insufficient, add cleaning agent. Replace the filter element of the system filter 3 as needed to ensure that the device is in a ready-to-test state.

[0055] Core logic: Through a closed-loop process of "filling-shaking-recovery-reset", the test parameters are accurately controllable, the cleanliness of the air intake system's outlet hose is automatically tested to eliminate human error, and the cleaning agent is efficiently recycled.

[0056] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A test device for the cleanliness of the inlet and outlet hoses of a filter inlet system, characterized in that: Includes pneumatic control module, electronic control module and tooling components; The pneumatic control module includes an air source (15), a pressure regulating valve (14), a pneumatic solenoid valve (12), and an adjustable stroke cylinder (11). The air source (15) is connected to the input end of the pressure regulating valve (14) through a gas pipeline. The output end of the pressure regulating valve (14) is connected to the air inlet of the pneumatic solenoid valve (12). The two working ports of the pneumatic solenoid valve (12) are respectively connected to the front chamber and the rear chamber of the adjustable stroke cylinder (11) through pipelines to drive the piston rod to reciprocate in the left and right directions. The electronic control module includes a time relay and a counter (13). The time relay is electrically connected to the pneumatic solenoid valve (12), and the counter (13) is electrically connected to the time relay. The tooling assembly is fixed to the front end of the piston rod of the adjustable stroke cylinder (11) and is used to clamp and seal the test piece (7) so that the test piece (7) moves back and forth synchronously with the piston rod.

2. The filter inlet and outlet hose cleanliness testing device according to claim 1, characterized in that: The pneumatic solenoid valve (12) is a two-position five-way directional valve, and a throttle valve is provided at its exhaust port.

3. The filter inlet and outlet hose cleanliness testing device according to claim 1, characterized in that: The electronic control module also includes a controller, which is electrically connected to a time relay, a counter (13) and a pneumatic solenoid valve (12).

4. The filter inlet and outlet hose cleanliness testing device according to claim 1, characterized in that: It also includes an automatic extraction and grading filtration system, which includes a storage tank (1), a transfer pump (2), a system filter (3), a regulating valve (4), a pressure gauge (5), a flow meter (6), a filtrate collection tank (8), a shut-off valve (9), a filter membrane (10), and a recovery pump (16). The outlet of the storage tank (1) is connected in sequence to the delivery pump (2), system filter (3), regulating valve (4) and flow meter (6) through a pipeline. The pipeline between the regulating valve (4) and the flow meter (6) is provided with the (5). The output end of the flow meter (6) is connected to the inlet of the tooling assembly through a pipeline. The outlet of the tooling assembly is connected to the filtrate collection tank (8) via a pipeline. The bottom of the filtrate collection tank (8) is connected to the input end of the filter membrane (10) via a shut-off valve (9). The output end of the filter membrane (10) is connected to the return port of the storage tank (1) via a recovery pump (16).

5. The filter inlet and outlet hose cleanliness testing device according to claim 4, characterized in that: The filter membrane (10) is a detachable filter membrane assembly consisting of at least two stages connected in series, with the pore size of each stage of the filter membrane decreasing sequentially along the direction of cleaning agent flow.

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