Air filter permeability detection device

Abstract

The present invention belongs to the technical field of air filter permeability detection, and specifically is an air filter permeability detection device, comprising a conveyor, wherein the conveyor is used to convey an air filter to be detected; a first bracket is arranged on one side of the conveyor, a first hydraulic cylinder is installed on the side of the first bracket, an air cylinder is arranged at the end of the output end of the first hydraulic cylinder, both ends of the air cylinder are ventilated, and a fan is installed inside the air cylinder; the air filter permeability detection device described in the present invention, by arranging an air connection cylinder and an air charging cylinder, during detection, the conveyor drives the air filter to be detected to a detection position, and then the air inlet and the air outlet of the air filter are respectively connected by the air charging cylinder and the air connection cylinder, and the detection is carried out in cooperation with the fan and the wind resistance detector, and after the detection is completed, the conveyor transports the next air filter to the detection position, so as to realize cyclic automatic detection; the detection efficiency is high, and it is suitable for monitoring large quantities of air filters.

Description

Technical Field

[0001] The invention belongs to the technical field of air filter permeability detection, in particular to an air filter permeability detection device. Background Art

[0002] The air filter is mainly used to filter the air entering the engine to prevent dust from entering the high-speed operating cylinder and causing wear. The composite fiber paper filter element is mainly used in the diesel engine filtration field, and the filtration efficiency is guaranteed by the filter paper grade. The air filter is generally composed of an intake guide pipe, an air filter cover, an air filter housing and a filter element. The air filters currently widely used in truck engines have various structural forms, such as single-stage plastic air filters, iron desert air filters and iron oil bath composite air filters.

[0003] Existing air filters need to undergo corresponding tests after production, among which air permeability testing is particularly important. Specifically, during the test, air needs to be injected into the air inlet of the air filter, and then a wind resistance tester is placed at the air outlet of the air filter to detect the wind strength. At the same time, the strength of the injected air at the air inlet of the air filter is compared to judge the air permeability of the air filter. Currently, during the test, the air filter needs to be installed at a designated location or tested by staff using a handheld instrument, which is inconvenient and not conducive to the testing of large quantities of air filters.

[0004] To this end, the present invention provides an air filter permeability detection device. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows: the air filter permeability detection device of the present invention comprises a conveyor, which is used to convey the air filter to be detected; a first bracket is arranged on one side of the conveyor, a first hydraulic cylinder is installed on the side of the first bracket, an air cylinder is arranged at the end of the output end of the first hydraulic cylinder, the air cylinder is ventilated at both ends, and a fan is installed inside the air cylinder; the inner circle diameter of the air cylinder is the same as the outer circle diameter of the air inlet of the air filter to be detected;

[0007] A second bracket is provided on the other side of the conveyor, a second hydraulic cylinder is provided on the side of the second bracket, a first connecting piece is provided at the end of the output end of the second hydraulic cylinder, an air cylinder is provided on the side of the first connecting piece away from the second hydraulic cylinder, the inner circle diameter of the air cylinder is the same as the outer circle diameter of the air outlet of the air filter to be tested; a wind resistance tester is provided inside the air cylinder.

[0008] Preferably, a third hydraulic cylinder is provided on the side of the second bracket away from the conveyor, a fixed plate is provided at the output end of the third hydraulic cylinder, a pair of regulating plates are provided at both ends of the fixed plate, and the distance between the pair of regulating plates is the same as the outer ring diameter of the air filter to be tested; the ends of the pair of regulating plates away from the fixed plate are arranged to be inclined away from each other.

[0009] Preferably, the first connecting member includes a connecting plate, one end of which is connected to the air cylinder, and the other end is provided with a pressure sensor, and the pressure sensor is connected to the external early warning device through an electrical signal; a pad is provided on one side of the pressure sensor, and the pad is connected to the end of the output end of the second hydraulic cylinder; a pair of first springs are provided between the pad and the connecting plate, and a pair of limit columns are provided through the side of the pad, and the end of the limit column away from the pad is fixed to the side of the connecting plate.

[0010] Preferably, a fixing frame is provided at the top of the first bracket, an output motor is installed at the bottom of the fixing frame, a turntable is provided at the bottom of the output end of the output motor, and the center line of the turntable coincides with the center line of the air filter to be tested; a fourth hydraulic cylinder is provided at the top of the turntable, and a driving block is provided at the bottom of the output end of the fourth hydraulic cylinder; the pressure sensor is connected to the controller of the fourth hydraulic cylinder and the output motor through electrical signals.

[0011] Preferably, the bottom end of the driving block is configured as a pointed end.

[0012] Preferably, a pair of limit bars are symmetrically arranged above the conveyor based on the center line of the conveying direction, and the spacing between the pair of limit bars is the same as the outer ring diameter of the air filter to be tested; a pair of support frames are arranged between the limit bars and the conveyor.

[0013] Preferably, the air receiving cylinder comprises a plurality of arc-shaped rubber plates, both ends of the arc-shaped rubber plates are provided with notches, a retractable roller is arranged inside the notch, an isolation film is rolled up on the surface of the retractable roller, and both ends of the isolation film are respectively fixed to the roller surface of the retractable roller close to each other; the roller surface of the retractable roller is attached to the innermost inner wall of the notch;

[0014] A support shaft is provided at both ends of the retractable roller, and a receiving plate is sleeved on the end of the support shaft away from the retractable roller. The receiving plate is arranged on the inner wall of the notch, and a second spring is provided between the receiving plate and the end of the retractable roller, and the second spring is sleeved on the outer side of the support shaft.

[0015] Preferably, a connecting plate is provided on one side of the connecting plate, a connecting column is provided on the side of the connecting plate, a positioning plate is provided on the side of the connecting column away from the connecting plate, the connecting column passes through the positioning plate, and the positioning plate is fixed to the inner wall of the notch, and a third spring is provided between the positioning plate and the connecting plate; the connecting plate is slidably connected to the inner wall of the notch.

[0016] Preferably, a plurality of guide blocks are provided at the end of the air receiving cylinder away from the second hydraulic cylinder, and the inclined surfaces of the guide blocks are butted against the inner wall of the air receiving cylinder; and the inclined surfaces extend in a direction away from the air receiving cylinder.

[0017] Preferably, the air receiving cylinder can be disassembled and installed at the location of the inflator cylinder.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The air filter permeability detection device described in the present invention is provided with an air connection cylinder and an inflation cylinder. During detection, the conveyor drives the air filter to be detected to the detection position, and then the inflation cylinder and the air connection cylinder are respectively connected to the air inlet and the air outlet of the air filter, and the detection is carried out in conjunction with the fan and the wind resistance detector. After the detection is completed, the conveyor conveys the next air filter to the detection position, thereby realizing cyclic automatic detection; the detection efficiency is high, and it is suitable for monitoring large quantities of air filters.

[0020] 2. The air filter permeability detection device described in the present invention is configured with an arc-shaped rubber plate. For air filter outlet pipes of different sizes, the air filter outlet is located at the end of the air filter outlet pipe. By adjusting the spacing between different arc-shaped rubber plates and coordinating the winding and releasing of the isolation membrane by the retractable roller, the isolation membrane is kept taut by a second spring, and the roller surface of the retractable roller is attached to the innermost wall of the notch. Therefore, when the air filter outlet pipe is embedded in the air receiving tube, the air receiving tube can remain sealed, thereby avoiding air leakage, ensuring detection accuracy, and improving the application scope of air filter detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is an overall diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the positions of the first bracket and the second bracket relative to the conveyor of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure on the first bracket of the present invention;

[0025] Figure 4 is a side schematic diagram of a second bracket of the present invention;

[0026] Figure 5 is a side schematic diagram of a first connecting member of the present invention;

[0027] Figure 6 is a three-dimensional schematic diagram of a first connecting member of the present invention;

[0028] Figure 7 It is a side schematic diagram of the air receiving cylinder of the present invention;

[0029] Figure 8 It is a schematic diagram of the structure inside the gap of the present invention;

[0030] Fig. 9 It is a schematic diagram of the connection structure of the docking plate of the present invention.

[0031] In the figure: 1. conveyor; 11. first bracket; 111. inflator; 112. first hydraulic cylinder; 12. second bracket; 121. inflator; 1211. arc-shaped rubber plate; 122. first connecting piece; 1221. connecting plate; 1222. limiting column; 1223. first spring; 1224. pad; 1225. pressure sensor; 123. second hydraulic cylinder; 2. notch; 21. retracting roller; 210. isolation membrane; 22. supporting shaft; 23. receiving plate; 24. second spring; 25. receiving column; 26. third spring; 27. positioning plate; 28. linkage plate; 3. receiving block; 4. fixed frame; 41. output motor; 42. turntable; 43. fourth hydraulic cylinder; 44. driving block; 5. third hydraulic cylinder; 51. fixed plate; 52. regulating plate; 6. limiting strip; 61. supporting frame. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0033] like Figures 1 to 4 As shown, an air filter permeability detection device according to an embodiment of the present invention comprises a conveyor 1, which is used to convey the air filter to be detected; a first bracket 11 is provided on one side of the conveyor 1, a first hydraulic cylinder 112 is installed on the side of the first bracket 11, an air cylinder 111 is provided at the end of the output end of the first hydraulic cylinder 112, the air cylinder 111 has ventilation at both ends, and a fan is installed inside the air cylinder 111; the inner diameter of the air cylinder 111 is the same as the outer diameter of the air inlet of the air filter to be detected;

[0034] A second bracket 12 is provided on the other side of the conveyor 1, a second hydraulic cylinder 123 is provided on the side of the second bracket 12, a first connecting member 122 is provided at the end of the output end of the second hydraulic cylinder 123, an air receiving cylinder 121 is provided on the side of the first connecting member 122 away from the second hydraulic cylinder 123, and the inner circle diameter of the air receiving cylinder 121 is the same as the outer circle diameter of the air outlet of the air filter to be tested; a wind resistance tester is provided inside the air receiving cylinder 121;

[0035] When testing the air permeability of the current air filter, the air filter needs to be installed in a specified position or tested by a staff member using a handheld instrument, which is inconvenient and not conducive to the testing of large quantities of air filters. To solve the above problems, the embodiment of the present invention provides structures such as an air filling cylinder 111 and an air receiving cylinder 121. When in use, the air filter to be tested is first conveyed to between the first bracket 11 and the second bracket 12 by the conveyor 1, and then the first hydraulic cylinder 112 and the second hydraulic cylinder 123 are started. The output end of the first hydraulic cylinder 112 drives the air filling cylinder 111 to move, so that the air filling cylinder 111 is connected to the air inlet of the air filter to be tested, and at the same time, the second hydraulic cylinder 123 drives the air receiving cylinder 121 to connect to the air outlet of the air filter to be tested through the first connecting piece 122. Then, the fan inside the air filling cylinder 111 is started, and the fan is started with a predetermined power, so that the air filling cylinder 111 is moved to Airflow is injected into the air filter, and the airflow is discharged through the air outlet of the air filter and received by the air receiving cylinder 121. The wind resistance detector installed inside the air receiving cylinder 121 determines the strength of the airflow discharged from the air filter outlet. The wind resistance detector will upload the data to an external computer for air permeability calculation. It should be pointed out that when the conveyor 1 transports the air filter, the production number of the air filter is recorded, so the air permeability of each air filter is recorded one by one, and then the air filter permeability strength test is completed. After the test is completed, the connection between the inflation cylinder 111 and the air inlet of the air filter to be tested and the connection between the air receiving cylinder 121 and the air outlet of the air filter to be tested are released; the conveyor 1 is cooperated to test the next air filter, and the test efficiency is high, which is suitable for monitoring large quantities of air filters; it should be pointed out that the air filter on the conveyor 1 is loaded and unloaded by a robot.

[0036] A third hydraulic cylinder 5 is provided on the side of the second bracket 12 away from the conveyor 1, and a fixed plate 51 is provided at the output end of the third hydraulic cylinder 5. A pair of regulating plates 52 are provided at both ends of the fixed plate 51, and the distance between the pair of regulating plates 52 is the same as the outer diameter of the air filter to be detected; the ends of the pair of regulating plates 52 away from the fixed plate 51 are arranged in an inclined state away from each other; when the conveyor 1 transports the air filter to the position between the first bracket 11 and the second bracket 12, since the robot may produce errors when placing the air filter, it is necessary to accurately position the air filter, so the regulating plate 52 is provided. When in use, the regulating plate 52 is driven by the third hydraulic cylinder 5 and the fixed plate 51 to move toward the air filter. The air filter that deviates from the position will adjust its position through the inclined end of the regulating plate 52, so that the air filter can restore its accurate position, which is beneficial to improving the detection accuracy.

[0037] like Figures 4 to 9 As shown, the first connecting member 122 includes a connecting plate 1221, one end of the connecting plate 1221 is connected to the air cylinder 121, and the other end is provided with a pressure sensor 1225, and the pressure sensor 1225 is connected to the external early warning device through an electrical signal; a pad 1224 is provided on one side of the pressure sensor 1225, and the pad 1224 is connected to the end of the output end of the second hydraulic cylinder 123; a pair of first springs 1223 are provided between the pad 1224 and the connecting plate 1221, and a pair of limiting columns 1222 are provided through the side of the pad 1224, and the ends of the limiting columns 1222 away from the pad 1224 are fixedly connected to the connecting plate 1221. The side of the connecting plate 1221; during detection, when the air inlet and air outlet of the air filter deviate from the docking position, as the air cylinder 121 approaches the air filter outlet, the deviated air filter outlet will block the docking cylinder 121, so that the air cylinder 121 drives the pressure sensor 1225 on the connecting plate 1221 to approach the pad 1224, and cooperates with the limit column 1222 and the first spring 1223 for limiting and buffering. Since the pressure sensor 1225 is connected to the external early warning device through electrical signals; therefore, when the pressure sensor 1225 is squeezed, the external early warning device alarms to remind the staff to make adjustments.

[0038] A fixing frame 4 is arranged at the top of the first bracket 11, an output motor 41 is installed at the bottom of the fixing frame 4, a turntable 42 is arranged at the bottom of the output end of the output motor 41, and the center line of the turntable 42 coincides with the center line of the air filter to be tested; a fourth hydraulic cylinder 43 is arranged at the top of the turntable 42, and a driving block 44 is arranged at the bottom of the output end of the fourth hydraulic cylinder 43; the pressure sensor 1225 is connected to the controller of the fourth hydraulic cylinder 43 and the output motor 41 through an electrical signal; after the pressure sensor 1225 is squeezed, the fourth hydraulic cylinder 43 and the output motor 41 are controlled to start through an electrical signal, and the output motor 41 drives the turntable 42 to rotate The turntable 42 drives the fourth hydraulic cylinder 43 to rotate, and at the same time, the fourth hydraulic cylinder 43 drives the driving block 44 to move to the same height as the L-shaped air intake pipe of the air filter. Then, when rotating, the driving block 44 drives the horizontal part of the L-shaped air intake pipe to rotate, so that the air filter rotates as a whole. Initially, the driving block 44 is located at the farthest position from the inflation cylinder 111. When rotating, the driving block 44 reciprocates 180 degrees, so that the air inlet of the air filter intake pipe is located at the docking position with the inflation cylinder 111, and then resets, thereby improving the overall detection automation effect. It should be pointed out that the air inlet of the air filter is located at the end of the air filter intake pipe.

[0039] The bottom end of the driving block 44 is set to be a pointed tip; when the driving block 44 encounters an obstruction of the air filter intake pipe during its downward movement, the pointed driving block 44 will drive the air filter to rotate through the inclined surface of the tip to avoid interference.

[0040] like Figure 1 to Figure 2 As shown, a pair of limit bars 6 are symmetrically arranged above the conveyor 1 based on the center line of the conveying direction, and the spacing between the pair of limit bars 6 is the same as the outer ring diameter of the air filter to be tested; a pair of support frames 61 are arranged between the limit bars 6 and the conveyor 1; when the air filter is placed on the conveyor 1, the limit bars 6 are set, and the pair of limit bars 6 limit the placement position of the air filter, which is beneficial to improve the accuracy of moving the air filter to the detection position.

[0041] like Figures 4 to 9 As shown, the air receiving cylinder 121 includes a plurality of arc-shaped rubber plates 1211, and notches 2 are formed at both ends of the arc-shaped rubber plates 1211. A retractable roller 21 is disposed inside the notch 2. An isolation film 210 is rolled up on the surface of the retractable roller 21. Both ends of the isolation film 210 are respectively fixed to the roller surfaces of the retractable rollers 21 that are close to each other. The roller surface of the retractable roller 21 is attached to the innermost inner wall of the notch 2.

[0042] Support shafts 22 are provided at both ends of the retractable roller 21, and a receiving plate 23 is sleeved on the end of the support shaft 22 away from the retractable roller 21. The receiving plate 23 is arranged on the inner wall of the notch 2, and a second spring 24 is provided between the receiving plate 23 and the end of the retractable roller 21. The second spring 24 is sleeved on the outer side of the support shaft 22;

[0043] During the inspection, for air filters of different sizes and models, an arc-shaped rubber plate 1211 is set, and multiple arc-shaped rubber plates 1211 cooperate with the isolation membrane 210 to form an air receiving tube 121. For air filter outlet pipes of different sizes, the air filter outlet is located at the end of the air filter outlet pipe. By adjusting the spacing positions of different arc-shaped rubber plates 1211, the isolation membrane 210 is wound and released by the retractable roller 21, and then the isolation membrane 210 is kept taut by the second spring 24, and the roller surface of the retractable roller 21 is attached to the innermost inner wall of the notch 2. Therefore, when the air filter outlet pipe is embedded in the air receiving tube 121, the air receiving tube 121 can remain sealed, avoid air leakage, ensure the inspection accuracy, and improve the application scope of air filter inspection. It should be pointed out that the windage detector installed in the air receiving tube 121 is installed by a deformable bracket, and a stable installation position can be maintained as the diameter of the air receiving tube 121 changes.

[0044] A linkage plate 28 is provided on one side of the receiving plate 23, a receiving column 25 is provided on the side of the linkage plate 28, a positioning plate 27 is provided on the side of the receiving column 25 away from the linkage plate 28, the receiving column 25 passes through the positioning plate 27, and the positioning plate 27 is fixed to the inner wall of the notch 2, and a third spring 26 is provided between the positioning plate 27 and the linkage plate 28; the receiving plate 23 is slidably connected to the inner wall of the notch 2; when the retractable roller 21 retracts and releases the isolation film 210, the third spring 26 passes through the positioning plate 27, and ... The receiving column 25 of 27 continuously squeezes the connecting plate 28 through the third spring 26, so that the connecting plate 28 drives the connecting plate 23 to continuously press toward the innermost inner wall of the notch 2. Therefore, driven by the support shaft 22, the retracting roller 21 continuously presses against the innermost inner wall of the notch 2, ensuring that when the retracting roller 21 retracts and releases the isolation membrane 210, no gap is generated between the retracting roller 21 and the innermost inner wall of the notch 2, thereby ensuring the sealing of the air receiving cylinder 121.

[0045] A plurality of guiding blocks 3 are provided at the end of the air receiving cylinder 121 away from the second hydraulic cylinder 123, and the inclined surface of the guiding block 3 is connected to the inner wall of the air receiving cylinder 121; and the inclined surface extends in the direction away from the air receiving cylinder 121; when the air outlet pipe of the air filter is connected to the air receiving cylinder 121, the inclined surface of the guiding block 3 will guide the end of the air outlet pipe of the air filter, so that the size and diameter of the air receiving cylinder 121 are automatically adjusted, which is convenient for operation; it should be pointed out that when the diameter of the air receiving cylinder 121 changes, the connecting plate 1221 can be deformed synchronously to avoid interfering with the adjustment of the spacing between the arc-shaped rubber plates 1211.

[0046] The air receiving cylinder 121 can be disassembled and installed at the location of the air charging cylinder 111; that is, the air charging cylinder 111 can also adapt to air filter inlet pipes of different sizes, further facilitating the monitoring of air filters of different sizes and models.

[0047] When in use, the air filter to be tested is first conveyed to between the first bracket 11 and the second bracket 12 by the conveyor 1, and then the first hydraulic cylinder 112 and the second hydraulic cylinder 123 are started. The output end of the first hydraulic cylinder 112 drives the inflation cylinder 111 to move, so that the inflation cylinder 111 is connected to the air inlet of the air filter to be tested, and at the same time, the second hydraulic cylinder 123 drives the air receiving cylinder 121 to connect to the air outlet of the air filter to be tested through the first connecting piece 122; then the fan inside the inflation cylinder 111 is started, and the fan is started with a predetermined power, so that the inflation cylinder 111 injects airflow into the air filter, and the airflow is discharged through the air outlet of the air filter, received by the air receiving cylinder 121, and installed on the air receiving cylinder 121. The internal wind resistance detector determines the strength of the air flow discharged from the air filter outlet, and the wind resistance detector will upload the data to an external computer for air permeability calculation. It should be pointed out that when conveyor 1 transports the air filter, the production number of the air filter is recorded, so the air permeability of each air filter is recorded one by one, and then the air filter permeability strength test is completed. After the test is completed, the connection between the inflation cylinder 111 and the air inlet of the air filter to be tested and the connection between the air cylinder 121 and the air outlet of the air filter to be tested are released; cooperate with conveyor 1 to test the next air filter, the test efficiency is high, and it is suitable for monitoring large quantities of air filters; it should be pointed out that the air filter on conveyor 1 is loaded and unloaded by a robot.

[0048] When the conveyor 1 conveys the air filter to the position between the first bracket 11 and the second bracket 12, since the manipulator may produce errors when placing the air filter, it is necessary to accurately position the air filter, so a control plate 52 is set. When in use, the control plate 52 is driven by the third hydraulic cylinder 5 and the fixed plate 51 to move in the direction of the air filter. The deviated air filter will adjust its position through the inclined end of the control plate 52, so that the air filter can accurately restore its position, which is beneficial to improving the detection accuracy; when the air inlet and air outlet of the air filter deviate from the docking position during detection, as the air receiving cylinder 121 approaches the air filter outlet, the deviated air filter outlet will block the docking cylinder 121, so that the air receiving cylinder 121 drives the pressure sensor 1225 on the connecting plate 1221 to approach the pad 1224, and cooperates with the limit column 1222 and the first spring 1223 to limit and buffer. Since the pressure sensor 1225 is electrically The signal is connected to the external early warning device; therefore, when the pressure sensor 1225 is squeezed, the external early warning device alarms to remind the staff to make adjustments; after the pressure sensor 1225 is squeezed, the fourth hydraulic cylinder 43 and the output motor 41 will be controlled by an electrical signal to start, and the output motor 41 drives the turntable 42 to rotate, and the turntable 42 drives the fourth hydraulic cylinder 43 to rotate. At the same time, the fourth hydraulic cylinder 43 drives the drive block 44 to move to the same height as the L-shaped air intake pipe of the air filter, and then when rotating, the drive block 44 drives the horizontal part of the L-shaped air intake pipe to rotate, so that the air filter rotates as a whole. Initially, the drive block 44 is located at the farthest position from the inflation cylinder 111. When rotating, the drive block 44 rotates back and forth 180 degrees, so that the air inlet of the air filter intake pipe is located at the docking position with the inflation cylinder 111, and then resets, thereby improving the overall detection automation effect; it should be pointed out that the air inlet of the air filter is located at the end of the air filter intake pipe.

[0049] When placing the air filter on the conveyor 1, a limit strip 6 is set, and a pair of limit strips 6 limit the placement position of the air filter, which is beneficial to improve the accuracy of moving the air filter to the detection position; when detecting, for air filters of different sizes, an arc-shaped rubber plate 1211 is set, and multiple arc-shaped rubber plates 1211 cooperate with the isolation membrane 210 to form an air receiving tube 121. For air filter outlet pipes of different sizes, the air filter outlet is located at the end of the air filter outlet pipe, and the air filter outlet is adjusted. The spacing positions of the different arc-shaped rubber plates 1211 cooperate with the winding and releasing of the isolation film 210 by the retractable roller 21, and then the isolation film 210 is kept taut by the second spring 24, and the roller surface of the retractable roller 21 is attached to the innermost inner wall of the notch 2, so when the air filter outlet pipe is embedded in the air receiving cylinder 121, the air receiving cylinder 121 can remain sealed; avoid air leakage; ensure detection accuracy; improve the application range of air filter detection; it should be pointed out that the wind resistance installed inside the air receiving cylinder 121 The detector is installed by a deformable bracket, and can maintain a stable installation position as the diameter of the air receiving cylinder 121 changes; when the retracting roller 21 retracts and releases the isolation film 210, the receiving column 25 that penetrates the positioning plate 27 continuously squeezes the linkage plate 28 through the third spring 26, so that the linkage plate 28 drives the receiving plate 23 to continuously press toward the innermost inner wall of the notch 2. Therefore, driven by the support shaft 22, the retracting roller 21 continuously presses against the innermost inner wall of the notch 2, ensuring that the retracting roller 21 retracts and releases the isolation film 210. During the process 10, the retracting and releasing roller 21 will not generate a gap with the innermost inner wall of the notch 2, thereby ensuring the sealing of the air receiving cylinder 121; when the air outlet pipe of the air filter is docked with the air receiving cylinder 121, the inclined surface of the guiding block 3 will guide the end of the air outlet pipe of the air filter, so that the size and diameter of the air receiving cylinder 121 are automatically adjusted, which is convenient for operation; it should be pointed out that when the diameter of the air receiving cylinder 121 changes, the connecting plate 1221 can be deformed synchronously to avoid interfering with the adjustment of the spacing between the arc-shaped rubber plates 1211.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An air filter permeability detection device, characterized in that: The invention comprises a conveyor (1), wherein the conveyor (1) is used to convey an air filter to be tested; a first bracket (11) is arranged on one side of the conveyor (1); a first hydraulic cylinder (112) is installed on the side of the first bracket (11); an air cylinder (111) is arranged at the end of the output end of the first hydraulic cylinder (112); both ends of the air cylinder (111) are ventilated, and a fan is installed inside the air cylinder (111); the inner diameter of the air cylinder (111) is the same as the outer diameter of the air inlet of the air filter to be tested; A second bracket (12) is provided on the other side of the conveyor (1), a second hydraulic cylinder (123) is provided on the side of the second bracket (12), a first connecting piece (122) is provided at the end of the output end of the second hydraulic cylinder (123), an air receiving cylinder (121) is provided on the side of the first connecting piece (122) away from the second hydraulic cylinder (123), the inner diameter of the air receiving cylinder (121) is the same as the outer diameter of the air outlet of the air filter to be tested; a wind resistance tester is provided inside the air receiving cylinder (121); the second bracket (12) is away from the conveyor (1) A third hydraulic cylinder (5) is provided on one side of the first connecting member (122); a fixed plate (51) is provided on the output end of the third hydraulic cylinder (5); a pair of regulating plates (52) are provided at both ends of the fixed plate (51); the distance between the pair of regulating plates (52) is the same as the outer diameter of the air filter to be detected; the ends of the pair of regulating plates (52) away from the fixed plate (51) are arranged in an inclined shape away from each other; the first connecting member (122) comprises a connecting plate (1221); one end of the connecting plate (1221) is connected to the air receiving cylinder (121); the other end of the connecting plate (1221) is provided with a pressure sensor (1225) ), the pressure sensor (1225) is connected to an external warning device through an electrical signal; a pad (1224) is provided on one side of the pressure sensor (1225), and the pad (1224) is connected to the end of the output end of the second hydraulic cylinder (123); a pair of first springs (1223) are provided between the pad (1224) and the connecting plate (1221), and a pair of limiting columns (1222) are provided through the side of the pad (1224), and the end of the limiting column (1222) away from the pad (1224) is fixedly connected to the side of the connecting plate (1221) ; A fixing frame (4) is arranged at the top end of the first bracket (11), an output motor (41) is installed at the bottom end of the fixing frame (4), a turntable (42) is arranged at the bottom end of the output end of the output motor (41), and the center line of the turntable (42) coincides with the center line of the air filter to be tested; a fourth hydraulic cylinder (43) is arranged at the top end of the turntable (42), and a driving block (44) is arranged at the bottom end of the output end of the fourth hydraulic cylinder (43); the pressure sensor (1225) is connected to the controller of the fourth hydraulic cylinder (43) and the output motor (41) through an electrical signal.

2. The air filter permeability detection device according to claim 1, characterized in that: The bottom end of the driving block (44) is configured as a pointed end.

3. The air filter permeability detection device according to claim 2, characterized in that: A pair of limit bars (6) are symmetrically arranged above the conveyor (1) based on the center line of the conveying direction, and the spacing between the pair of limit bars (6) is the same as the outer ring diameter of the air filter to be tested; and a pair of support frames (61) are arranged between the limit bars (6) and the conveyor (1).

4. The air filter permeability detection device according to claim 1, characterized in that: The air receiving cylinder (121) comprises a plurality of arc-shaped rubber plates (1211), each of the arc-shaped rubber plates (1211) being provided with a notch (2) at both ends, a retractable roller (21) being arranged inside the notch (2), an isolation film (210) being rolled up on the surface of the retractable roller (21), and both ends of the isolation film (210) being respectively fixed to roller surfaces of the retractable rollers (21) that are close to each other; the roller surface of the retractable roller (21) is attached to the innermost inner wall of the notch (2); Support shafts (22) are provided at both ends of the retractable roller (21); a receiving plate (23) is sleeved on the end of the support shaft (22) away from the retractable roller (21); the receiving plate (23) is arranged on the inner wall of the notch (2); a second spring (24) is provided between the receiving plate (23) and the end of the retractable roller (21); the second spring (24) is sleeved on the outer side of the support shaft (22).

5. The air filter permeability detection device according to claim 4, characterized in that: A linkage plate (28) is provided on one side of the receiving plate (23), a receiving column (25) is provided on the side of the linkage plate (28), a positioning plate (27) is provided on the side of the receiving column (25) away from the linkage plate (28), the receiving column (25) passes through the positioning plate (27), and the positioning plate (27) is fixed to the inner wall of the notch (2), and a third spring (26) is provided between the positioning plate (27) and the linkage plate (28); the receiving plate (23) is slidably connected to the inner wall of the notch (2).

6. The air filter permeability detection device according to claim 5, characterized in that: A plurality of receiving blocks (3) are provided at the end of the air receiving cylinder (121) away from the second hydraulic cylinder (123); the inclined surfaces of the receiving blocks (3) are butted against the inner wall of the air receiving cylinder (121); and the inclined surfaces extend in a direction away from the air receiving cylinder (121).

7. The air filter permeability detection device according to claim 6, characterized in that: The air receiving cylinder (121) can be disassembled and installed at the location of the inflation cylinder (111).

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