A multi-scenario simulation internal-external double circulation filter material test bench

Abstract

The utility model discloses a kind of multi-scene simulation's internal and external double circulation filter material test bench, it is related to filter material test equipment field, the utility model includes workbench and the upstream section and downstream section installed in workbench upper end, filter material is installed between upstream section and downstream section, upstream section and downstream section are transparent section near filter material, the test state of filter material is convenient for observation, fan is installed in workbench, a group of capsule type high-efficiency filter is connected in the input one end of fan, and capsule type high-efficiency filter accesses ambient air, the output one end of capsule type high-efficiency filter is connected with pneumatic three-way valve one, and the output one end of pneumatic three-way valve one is respectively connected upstream section and fan;The utility model satisfies to carry out the test of multiple kinds of pollutants to filter material in multiple scenes. using fan cooperation capsule type high-efficiency filter and pneumatic three-way valve, the pipeline of equipment can be adjusted to positive pressure and negative pressure, satisfy the need of positive pressure and negative pressure under different scenes.

Description

Technical Field

[0001] This utility model relates to the field of filter media testing equipment, and in particular to a multi-scenario simulation internal and external dual circulation filter media testing platform. Background Technology

[0002] A filter media testing bench is a professional device specifically designed to test the core performance of various filter media. With industrial upgrading, increasingly stringent environmental protection requirements, and the development of precision manufacturing, the performance stability and reliability of filter media have become critical aspects, and the filter media testing bench is the core support tool to ensure that filter media "meets the needs of the application scenario." Current filter media testing equipment typically uses a single channel for testing after being connected to a fan. However, a single channel can only test a limited number of pollutant categories and is not effective in adapting to special pollutants (such as salt spray). Therefore, current testing equipment cannot meet the needs of filter media testing under multi-scenario simulation and has certain operational limitations. Utility Model Content

[0003] The main objective of this invention is to provide a multi-scenario simulation test bench for internal and external dual-circulation filter media to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model relates to a multi-scenario simulation internal and external dual-circulation filter material test bench, including a workbench and an upstream section and a downstream section installed on the upper part of the workbench. Filter material is installed between the upstream section and the downstream section. A fan is installed inside the workbench. One input end of the fan is connected to a set of capsule-type high-efficiency filters, and the capsule-type high-efficiency filters are connected to ambient air. The outlet of the capsule-type high-efficiency filters is connected to a pneumatic three-way valve. The two outlets of the pneumatic three-way valve are respectively connected to the upstream of the upstream section and the fan. The downstream of the downstream section is connected to a water filter. The downstream of the water filter is connected to a pneumatic three-way valve. The two outlets of the pneumatic three-way valve are respectively connected to the inlet of the fan and the fresh air exhaust channel.

[0005] Furthermore, both the lower ends of the upstream and downstream sections are connected to a rotating mechanism, and a sliding mechanism is also installed on the upper end of the worktable. The bottom of the rotating mechanism at the lower end of the downstream section is connected to the sliding mechanism.

[0006] Furthermore, the rotating mechanism includes a positioning cylinder and a solenoid valve one. The solenoid valve one is connected upstream to a compressed air pipeline and downstream to the positioning cylinder. The sliding mechanism includes a push-pull cylinder, a solenoid valve two, and a pressure regulating valve. The pressure regulating valve one is connected upstream to a compressed air pipeline and downstream to the solenoid valve two. The solenoid valve two is connected downstream to the push-pull cylinder, which drives the sliding mechanism to slide using pneumatic principles. A backflush device is installed at the upper end of the downstream section. The backflush device includes an air tank, a solenoid valve three, and a diaphragm valve. The air tank is connected upstream to a compressed air pipeline and downstream to a backflush pipe at the end of the backflush device via the diaphragm valve. The solenoid valve three controls the opening and closing of the diaphragm valve.

[0007] Furthermore, the output end of the fan is connected to a flow meter, and downstream of the flow meter is an air compressor. One output pipe of the air compressor is equipped with a pressure reducing valve. Downstream of the pressure reducing valve are an air tank, a pressure regulating valve, and a solenoid valve. Downstream of the pressure reducing valve is a pressure regulating valve, and downstream of the pressure regulating valve is a flow meter. Downstream of the flow meter is a humidifier, and downstream of the humidifier is connected to the upstream section.

[0008] Furthermore, the air compressor is connected to a frequency converter, and one output end of the air compressor is connected to a pressure regulating valve. Downstream of the pressure regulating valve is a flow meter. Downstream of the flow meter is a needle valve, a cooler, a water filter, a solenoid valve, and an atomizing nozzle. The solenoid valve controls the opening and closing of the atomizing nozzle. The output end of the atomizing nozzle is connected to the upstream section. Downstream of the flow meter is a flow regulating valve. Downstream of the flow regulating valve is a pneumatic ball valve. Downstream of the pneumatic ball valve is connected to the upstream section.

[0009] Furthermore, the workbench is equipped with three sets of injection pumps. Injection pump one is connected to test oil, and injection pump two and injection pump three are both connected to test water. The outlet of injection pump one is connected to solenoid valve four, the outlet of injection pump two is connected to solenoid valve five, and the outlet of injection pump three is connected to solenoid valve six. Solenoid valves four, five, and six are connected to atomizing nozzles downstream.

[0010] Furthermore, a sodium flame photometry testing mechanism is installed on one side of the workbench. The sodium flame photometry testing mechanism includes a sodium flame photometer and a hydrogen generator. The hydrogen generator is connected to the sodium flame photometer. One end of the sodium flame photometer is connected to the upstream section, and the other end of the sodium flame photometer is connected to the downstream section.

[0011] Furthermore, each of the upstream and downstream sections is provided with a filter media clamp, and the filter media is held between the two filter media clamps.

[0012] Furthermore, the upstream section is also connected to a salt spray inlet pipe and a dust generator.

[0013] This utility model has the following beneficial effects: This invention designs a multi-scenario simulation internal and external dual-circulation filter material test bench to meet the testing of filter materials for various types of pollutants in multiple scenarios. Utilizing a fan in conjunction with a bladder-type high-efficiency filter and a pneumatic three-way valve, the equipment's pipeline can be adjusted for positive and negative pressure. When artificial dust needs to be injected upstream, the system can switch to negative pressure, allowing the dust to be drawn into the system. When testing filter material efficiency, the system can switch to positive pressure, ensuring that even in the event of a leak, outside air will not enter the test area, thus avoiding increasing the internal factor and affecting the test results. Meanwhile, the test bench of this utility model is equipped with a back-blowing mechanism and a water filter. The back-blowing mechanism is used to clean the filter media by back-blowing, removing artificial dust from the filter media, simulating the back-blowing scenario on site, and testing the dust holding capacity and back-blowing dust removal effect of the filter media. During the spray test, the water filter can adsorb and filter the residual water to prevent it from entering the fan, thus protecting the fan and the flow meter. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the internal and external dual circulation filter material test bench for multi-scenario simulation of this utility model. Figure 2 This is an operation flowchart of the internal and external dual circulation filter material test bench for multi-scenario simulation of this utility model. Figure 3 This is a schematic diagram of the on / off control of the capsule-type high-efficiency filter of this utility model.

[0015] In the diagram: 1. Workbench; 2. Fan; 3. Upstream section; 4. Filter media; 5. Downstream section; 6. Filter media clamp; 7. Backflush device; 8. Humidifier; 9. Rotating mechanism; 10. Sliding mechanism; 11. Sodium flame photometer; 12. Hydrogen generator. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. The preferred embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. Although the preferred embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this utility model more thorough and complete, and to fully convey the scope of this utility model to those skilled in the art. Example:

[0017] Please refer to Figures 1-3 A multi-scenario simulation internal and external dual-circulation filter media test bench includes a workbench 1 and an upstream section 3 and a downstream section 5 installed on the upper part of the workbench 1. Filter media 4 is installed between the upstream section 3 and the downstream section 5, and the filter media 4 serves as the test medium. The upstream section 3 and the downstream section 5 are transparent sections near the filter media 4 to facilitate observation of the test status of the filter media 4. A fan 2 is installed inside the workbench 1, and a set of capsule-type high-efficiency filters is connected to the input end of the fan 2. The capsule-type high-efficiency filters are connected to the ambient air. Rotation mechanisms are connected to the lower ends of both the upstream section 3 and the downstream section 5. 9. The upstream section 3 and the downstream section 5 can be rotated separately by the rotating mechanism 9 to facilitate cleaning. A sliding mechanism 10 is also installed on the upper end of the workbench 1. The bottom of the rotating mechanism 9 at the lower end of the downstream section 5 is connected to the sliding mechanism 10. The sliding mechanism 10 can be used to move the downstream section 5 closer to or away from the upstream section 3, which facilitates the maintenance and replacement of the filter media 4. A filter media clamp 6 is provided at the joint end of the upstream section 3 and the downstream section 5. The filter media 4 installed between the upstream section 3 and the downstream section 5 is clamped and fixed by the filter media clamp 6.

[0018] The outlet of the capsule-type high-efficiency filter is connected to a pneumatic three-way valve. The two outlets of the pneumatic three-way valve are connected to the upstream of upstream section 3 and upstream of fan 2, respectively. The downstream of downstream section 5 is connected to a water filter. During the spray test, the water filter absorbs and filters residual water, thus protecting fan 2 and flow meter 1. Downstream of the water filter is a pneumatic three-way valve, and the two outlets of the pneumatic three-way valve are connected to the inlet of fan 2 and the fresh air exhaust channel, respectively. When pneumatic three-way valve one connects the capsule-type high-efficiency filter to fan 2, the negative pressure pipeline is closed, and pneumatic three-way valve two opens to exhaust, cutting off the outlet connected to fan 2. At this time, fan 2 draws air from the atmosphere through the capsule-type high-efficiency filter, and the gas filtered by the filter material is finally discharged into the atmosphere through the fresh air exhaust channel. The entire system is in external circulation, and the area near the filter material downstream of fan 2 is in a positive pressure state. When pneumatic three-way valve one connects the capsule-type high-efficiency filter to the upstream of upstream section 3, the positive pressure pipeline is closed, and pneumatic three-way valve two closes to exhaust and opens the outlet connected to fan 2. At this time, the system does not produce significant gas exchange with the outside atmosphere. The capsule-type high-efficiency filter is connected to the upstream of upstream section 3 through pneumatic three-way valve one and the negative pressure pipeline, thereby using atmospheric pressure to calibrate the upstream of upstream section 3 to atmospheric pressure. At this time, the filter material is closer to the air intake of fan 2 than upstream section 3, and the air pressure is lower, so it is in a negative pressure state. When the humidity of the gas in the system is too high, it can be ventilated by switching to external circulation; when artificial dust needs to be injected into the upstream section 3, it can be switched to negative pressure so that the dust can be sucked into the system; when testing the efficiency of the filter material, it can be switched to positive pressure so that even if there is a leak, outside air will not enter the test area, thus avoiding increasing the internal factor and affecting the test results.

[0019] The rotating mechanism 9 includes a positioning cylinder and a solenoid valve. The solenoid valve is connected upstream to a compressed air pipeline and downstream to the positioning cylinder. Compressed air drives the positioning cylinder. The rotating mechanism 9 is manually operated. The positioning cylinder acts as a latch, popping out after alignment to restrict the rotation of the rotating mechanism 9 and prevent the upstream section 3 and downstream section 5 from shifting positions during testing. Both upstream section 3 and downstream section 5 can be rotated for adjustment, exposing one end of each section for easy cleaning of their inner surfaces. After cleaning, the positioning mechanism rotates again to align the upstream section 3 and downstream section 5. The sliding mechanism 10 includes a push-pull cylinder, a solenoid valve, and a pressure regulating valve. The pressure regulating valve is connected upstream to a compressed air pipeline. Compressed air can be obtained from an air compressor. The pressure regulating valve is connected downstream to the solenoid valve, which in turn is connected downstream to the push-pull cylinder. After the compressed air is adjusted to a suitable pressure by the pressure regulating valve, it is controlled by the solenoid valve to enter the push-pull cylinder. The push-pull cylinder uses pneumatic principles to drive the sliding mechanism 10 to slide, facilitating the replacement and installation of filter media. A backflush device 7 is installed at the upper end of the downstream section 5. The backflush device 7 includes an air tank, a solenoid valve, and a diaphragm valve. The upstream of the air tank is connected to a compressed air pipeline, and the downstream is connected to the backflush pipe at the end of the backflush device 7 through the diaphragm valve. The solenoid valve controls the opening and closing of the diaphragm valve. During backflushing, the stored gas is pumped into the downstream section 5 instantaneously, thereby backflushing and cleaning the filter media 4.

[0020] The output of fan 2 is connected to flow meter 1, and downstream of flow meter 1 is an air compressor. One output line of the air compressor is equipped with a pressure reducing valve (GFR300-08). Downstream of the pressure reducing valve are an air tank, a pressure regulating valve, and solenoid valve 1. The pneumatic air source output by the pressure reducing valve, in conjunction with solenoid valves 1, 2, and 3, controls the opening and closing of the positioning cylinder, the push-pull cylinder, and the air tank, respectively. Downstream of the pressure reducing valve is also a pressure regulating valve 2, downstream of which is flow meter 2. Downstream of flow meter 2 is a humidifier 8, located inside workbench 1. Downstream of humidifier 8 is connected to upstream section 3. Compressed air is blown out as humidified gas through pressure regulating valve 2 and flow meter 2, reaching upstream section 3. The air compressor is connected to a frequency converter, meaning the air compressor is a variable frequency compressor. One output of the air compressor is connected to pressure regulating valve 1, downstream of which is flow meter 3. Flow meter 3 detects flow rate changes and uses feedback data to control the frequency converter, thereby controlling the output power of the air compressor to match actual needs. Downstream of flow meter three are connected a needle valve, a cooler, water filter three, solenoid valve seven, and an atomizing nozzle. Solenoid valve seven controls the opening and closing of the atomizing nozzle, which atomizes pollutants (water mixture, oil mixture, etc.). The output of the atomizing nozzle is connected to upstream section 3 for generating pollutants for testing. Downstream of flow meter one is a flow regulating valve, and downstream of the flow regulating valve is a pneumatic ball valve, which is connected to upstream section 3.

[0021] Inside the workbench 1, there are also three sets of injection pumps. Injection pump 1 is connected to test oil, and injection pumps 2 and 3 are both connected to test water. The outlet of injection pump 1 is connected to solenoid valve 4, the outlet of injection pump 2 is connected to solenoid valve 5, and the outlet of injection pump 3 is connected to solenoid valve 6. Downstream of solenoid valves 4, 5, and 6, atomizing nozzles are connected. The atomizing nozzles use high-speed airflow to draw out water and oil (such as oily test aerosols DEHS, etc.) and spray the mixed contaminants into the upstream section 3 for testing.

[0022] A sodium flame photometry testing mechanism is installed on one side of the workbench 1. This mechanism includes a sodium flame photometer 11 and a hydrogen generator 12. The hydrogen generator 12 is connected to the sodium flame photometer 11. One end of the sodium flame photometer 11 is connected to the upstream section 3, and the other end is connected to the downstream section 5, thereby testing the concentration of salt spray particles. Specifically, the salt spray particles, in conjunction with the hydrogen generator 12, generate hydrogen and burn, simultaneously emitting yellow light. The intensity of this yellow light is then detected using the sodium flame photometer 11. The upstream section 3 is also connected to a salt spray... The salt spray enters the pipeline and dust generator. Salt spray particles are introduced into the upstream section 3 of the pipeline, and dust particles are introduced into the upstream section 3 of the dust generator. The specific type of dust introduced depends on the test requirements. The salt spray entering pipeline and the dust generator are used independently. After the salt spray particles are introduced into the upstream section 3, they pass through the filter media 4 and reach the downstream section 5. The concentration of the upstream section 3 and the downstream section 5 is tested by using a sodium flame photometer 11. The filtration efficiency of the filter media 4 is obtained by comparing the concentrations of the upstream section 3 and the downstream section 5, according to the formula (upstream concentration - downstream concentration) / upstream concentration.

[0023] This utility model relates to a multi-scenario simulation internal and external dual-circulation filter material test bench. It utilizes a fan 2 and a bladder-type high-efficiency filter, along with two sets of pneumatic three-way valves, to change the connection point between the pipe section and the atmosphere, thereby altering the positive and negative pressure within the pipe section. When the atmospheric connection point is connected to the air inlet of fan 2, the pipe section is under positive pressure; when it is connected to the air outlet of fan 2, the pipe section is under negative pressure. When artificial dust needs to be injected into the upstream section 3, the system can switch to negative pressure, allowing the dust to be drawn into the system. When testing filter material efficiency, the system can switch to positive pressure, preventing outside air from entering the test area even in case of leakage, thus avoiding increasing the internal factor and affecting the test results. The pneumatic three-way valves control the internal and external air circulation of the equipment. During normal operation, the equipment is in internal circulation mode; when temperature and humidity adjustments are needed to match the test target, the system switches to external circulation.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-scenario simulation internal and external dual-circulation filter material test bench, comprising a workbench (1) and an upstream section (3) and a downstream section (5) installed on the upper end of the workbench (1), characterized in that: A filter material (4) is installed between the upstream section (3) and the downstream section (5). A fan (2) is installed inside the workbench (1). One end of the fan (2) is connected to a set of capsule-type high-efficiency filters, and the capsule-type high-efficiency filters are connected to the ambient air. The outlet of the bladder-type high-efficiency filter is connected to a pneumatic three-way valve one. The two outlets of the pneumatic three-way valve one are respectively connected to the upstream of the upstream section (3) and the fan (2). The downstream of the downstream section (5) is connected to a water filter one. The downstream of the water filter one is connected to a pneumatic three-way valve two. The two outlets of the pneumatic three-way valve two are respectively connected to the inlet of the fan (2) and the fresh air exhaust channel.

2. The multi-scenario simulation internal and external dual-circulation filter material test bench according to claim 1, characterized in that: The upper end of the upstream section (3) and the lower end of the downstream section (5) are both connected to a rotating mechanism (9), and the upper end of the worktable (1) is also equipped with a sliding mechanism (10). The bottom of the rotating mechanism (9) at the lower end of the downstream section (5) is connected to the sliding mechanism (10).

3. The multi-scenario simulation internal and external dual-circulation filter material test bench according to claim 2, characterized in that: The rotating mechanism (9) includes a positioning cylinder and a solenoid valve. The solenoid valve is connected to a compressed air pipeline upstream and to the positioning cylinder downstream. The sliding mechanism (10) includes a push-pull cylinder, a solenoid valve, and a pressure regulating valve. The pressure regulating valve is connected to a compressed air pipeline upstream and to the solenoid valve downstream. The solenoid valve is connected to a push-pull cylinder downstream. The push-pull cylinder drives the sliding mechanism (10) to slide using pneumatic principles. A backflush device (7) is installed at the upper end of the downstream section (5). The backflush device (7) includes an air tank, a solenoid valve, and a diaphragm valve. The air tank is connected to a compressed air pipeline upstream and to the backflush pipe at the end of the backflush device (7) downstream. The solenoid valve controls the opening and closing of the diaphragm valve.

4. The multi-scenario simulation internal and external dual-circulation filter material test bench according to claim 3, characterized in that: The output end of the fan (2) is connected to a flow meter, and the downstream of the flow meter is connected to an air compressor. One output pipe of the air compressor is equipped with a pressure reducing valve. Downstream of the pressure reducing valve is an air storage tank, a pressure regulating valve and a solenoid valve. Downstream of the pressure reducing valve is also a pressure regulating valve, and downstream of the pressure regulating valve is a flow meter. Downstream of the flow meter is a humidifier (8), and downstream of the humidifier (8) is connected to the upstream section (3).

5. The multi-scenario simulation internal and external dual-circulation filter material test bench according to claim 4, characterized in that: The air compressor is connected to the frequency converter. One output end of the air compressor is connected to the pressure regulating valve. Downstream of the pressure regulating valve is the flow meter. Downstream of the flow meter is connected in sequence the needle valve, cooler, water filter, solenoid valve, and atomizing nozzle. The solenoid valve controls the opening and closing of the atomizing nozzle. The output end of the atomizing nozzle is connected to the upstream section (3). Downstream of the flow meter is also connected to the flow regulating valve. Downstream of the flow regulating valve is connected to the pneumatic ball valve. Downstream of the pneumatic ball valve is connected to the upstream section (3).

6. The multi-scenario simulation internal and external dual-circulation filter material test bench according to claim 5, characterized in that: The workbench (1) is also equipped with three sets of injection pumps, namely injection pump one, injection pump two and injection pump three. Injection pump one is connected to test oil, and injection pump two and injection pump three are connected to test water. The outlet of injection pump one is connected to solenoid valve four, the outlet of injection pump two is connected to solenoid valve five, and the outlet of injection pump three is connected to solenoid valve six. Solenoid valve four, solenoid valve five and solenoid valve six are connected to atomizing nozzles downstream.

7. The multi-scenario simulation internal and external dual-circulation filter material test bench according to claim 1, characterized in that: A sodium flame photometry testing mechanism is installed on one side of the workbench (1). The sodium flame photometry testing mechanism includes a sodium flame photometer (11) and a hydrogen generator (12). The hydrogen generator (12) is connected to the sodium flame photometer (11). One end of the sodium flame photometer (11) is connected to the upstream section (3), and the other end of the sodium flame photometer (11) is connected to the downstream section (5).

8. The multi-scenario simulation internal and external dual-circulation filter material test bench according to claim 1, characterized in that: The upstream section (3) and the downstream section (5) are each provided with a filter media clamp (6), and the filter media (4) is clamped between the two filter media clamps (6).

9. The multi-scenario simulation internal and external dual-circulation filter material test bench according to claim 1, characterized in that: The upstream section (3) is also connected to a salt spray inlet pipe and a dust generator.

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