Filter screen element structure integrity test system and test method thereof

Abstract

The invention discloses a filter screen element structure integrity test system, belongs to the technical field of filter screen element detection, and solves the problems that a filter screen element structure integrity test structure is too complex, and test elements are inconvenient to disassemble and assemble. According to the technical scheme, the device mainly comprises an air compressor and a three-way pipe connector connected with the air compressor, the three-way pipe connector comprises a first air source and a second air source, the first air source is sequentially connected with a pneumatic two-linkage piece and a test model, the test model is installed on a support, the support is hung below a rack, and the support is connected with the air compressor. The rack is provided with an air cylinder, the air cylinder is connected with a pressure head, the rack is arranged above the water tank, the test model sinks into the water tank, the two-way air source is connected with a two-position three-way hand-operated direction valve, and the two-position three-way hand-operated direction valve is communicated with the air cylinder and controls the pressure head to rise and fall through the air cylinder, so that the pressure head tightly presses the test model.

Description

Technical Field

[0001] The invention relates to a filter element structural integrity test system and a test method thereof, belonging to the technical field of filter element detection. Background Art

[0002] Sheet-shaped filter elements are widely used in our company's aviation fuel products and are a key anti-contamination measure. The filtration quality of these filter elements has an increasingly significant impact on our products. Currently, our company relies on visual inspection during production inspection of both our in-house and purchased filter elements. Since the quality of a filter element is determined by its mesh size, visual inspection alone is not an effective way to verify its filtration quality. Currently, our company lacks any means to test filter quality.

[0003] However, existing filter element bubbling test systems and test devices use electric components to drive the filter element to rotate or use a universal transmission to rotate the filter element for testing. In addition, the filter elements to be tested are inconvenient to disassemble and install, and are not suitable for batch testing of filter elements. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a filter element structural integrity test system and a test method thereof, which improve the problem that the filter element structural integrity test structure is too complicated and the test element is inconvenient to disassemble and install.

[0005] The present invention provides a filter element structural integrity test system, including an air compressor and a three-way pipe joint connected to the air compressor, the three-way pipe joint including one air source and two air sources, the one air source is connected to a pneumatic two-way joint and a test model in sequence, the test model is installed on a bracket, the bracket is hung under a stand, a cylinder is provided on the stand, the cylinder is connected to a pressure head, the stand is arranged above a water tank, the test model is sunk into the water tank, the two-way air source is connected to a two-position three-way manual reversing valve, the two-position three-way manual reversing valve is connected to the cylinder and controls the rise and fall of the pressure head through the cylinder so that the pressure head presses the test model.

[0006] Furthermore, an air duct is provided in the middle of the test model, and the air duct axially penetrates the test model. The test model is provided with a countersunk hole for installing a filter element on the outer periphery of the upper side of the air duct.

[0007] Furthermore, a sealing groove for installing a first sealing ring is provided on the outer periphery of the countersunk hole.

[0008] Furthermore, a pneumatic hose connector for connecting a pneumatic hose is installed on the lower side of the air channel, and the test model is connected to the pneumatic two-piece and an air source through the pneumatic hose.

[0009] Furthermore, a sealing gasket is installed in the countersunk hole.

[0010] Furthermore, the pressure head includes an upper column, a lower column and a column, the column connects the upper column and the lower column and protrudes from the bottom of the lower column, the test model is provided with a mounting hole with the same diameter as the column, and the pressure head is connected to the test model through the cooperation between the column and the mounting hole.

[0011] Furthermore, a conical observation hole is provided on the lower column of the pressure head, a buckle is provided on the column, the buckle is connected to a bubble sensor, and the bubble sensor is axially aligned with the conical observation hole.

[0012] Furthermore, a threaded hole is provided on the upper cylinder of the pressure head, and the pressure head is threadedly connected to the cylinder through the threaded hole.

[0013] A test method for a filter element structural integrity test system, the test steps are as follows: S1: Install the sealing gasket and the filter element to be tested; S2: Turn on the air compressor and wait for the cylinder to drive the pressure head to extend and press the test model; S3: Slowly adjust the pressure reducing valve of the pneumatic two-way joint, observe the pressure instrument, and slowly increase the pressure; S4: Observe the bubble sensor. When the bubble sensor sends a signal, stop pressurizing, record the bubbling pressure and locate the bubbling point. S5: Turn the two-position three-way manual reversing valve, the cylinder drives the pressure head to retract, take out the filter element, and place it under an electron microscope; S6: Observe and measure the bubbling site, take microscopic photos, and process the image data using a computer; S7: Determine the structural integrity of the filter element by combining the bubble pressure and the microscopic image data of the filter element in S4 and S6.

[0014] The above technical solution is adopted, and the advantage of the present invention is that: by placing the filter element in the test model, and the test model is sunk into the water in the water tank, after the two-position three-way manual reversing valve is opened, the cylinder controls the pressure head to fall and press the test model, so that the position of the filter element is fixed. At this time, since the pneumatic two-way component and the test model are connected to one air source, the air pressure of the gas sent to the test model by one air source can be adjusted by the pneumatic two-way component, so that the integrity of the filter element structure can be judged by observing the generation of bubbles on the water surface. The device has a simple structure and is easy to disassemble, and it is easy to realize multiple structural integrity tests on different or repeated identical filter elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a filter element structural integrity test system according to the present invention; Figure 2It is a structural schematic diagram of the filter element structural integrity test model; Figure 3 Schematic diagram of the pressure head structure; In the figure: 1 air compressor, 2 three-way pipe joint, 3 cylinder, 4 pressure head, 5 pneumatic two-way joint, 6 two-position three-way manual reversing valve, 7 computer, 8 electron microscope, 9 bubble sensor, 10 test model, 11 bracket, 12 stand, 13 water tank, 14 sealing groove, 15 filter element, 16 sealing gasket, 17 pneumatic pipe joint, 18 upper cylinder, 19 lower cylinder, 20 column, 21 buckle, 22 tapered observation hole, 23 threaded hole, 24 air duct, 25 countersunk hole, 26 first sealing ring, 27 mounting hole, 28 second sealing ring, 29 one-way air source, 30 two-way air source. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0017] The terms "first," "second," and so on (if any) in the specification and claims of this invention are used to distinguish similar items, not to describe a specific order or precedence. Even if "second" is used to distinguish a technical feature, it does not necessarily imply the presence of "first." It should be understood that, in this invention, "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. It should be understood that, in this invention, "plurality" refers to two or more items. "And / or" simply describes an association between related items, indicating that three possible relationships exist. For example, "X and / or Y" can mean: X exists alone; X and Y exist simultaneously; or Y exists alone. The character " / " generally indicates that the related items are in an "or" relationship. "Including X, Y, and Z" means including all three of X, Y, and Z. "Including X, Y, or Z" means including any one of X, Y, and Z. "Including X, Y, and / or Z" means including any one, any two, or any three of X, Y, and Z. Example

[0018] like Figures 1 to 3As shown, the present invention provides a filter element 15 structural integrity test system, including an air compressor 1 and a three-way pipe joint 2 connected to the air compressor 1, the three-way pipe joint 2 includes a one-way air source 29 and a two-way air source 30, the one-way air source 29 is connected to the pneumatic two-way joint 5 and the test model 10 in sequence, the test model 10 is installed on the bracket 11, the bracket 11 is hung under the stand 12, the stand 12 is provided with a cylinder 3, the cylinder 3 is connected to the pressure head 4, the stand 12 is arranged above the water tank 13, the test model 10 is sunk into the water tank 13, the two-way air source 30 is connected to a two-position three-way manual reversing valve 6, the two-position three-way manual reversing valve 6 is connected to the cylinder 3 and controls the rise and fall of the pressure head 4 through the cylinder 3, so that the pressure head 4 presses the test model 10.

[0019] The present invention places the filter element 15 in the test model 10, and the test model 10 is sunk into the water in the water tank 13. After the two-position three-way manual reversing valve 6 is opened, the cylinder 3 controls the pressure head 4 to fall and press the test model 10, so that the position of the filter element 15 is fixed. At this time, since the pneumatic two-way component 5 and the test model 10 are connected to the one-way air source 29, the air pressure of the gas sent to the test model 10 by the one-way air source 29 can be adjusted by the pneumatic two-way component 5, so that the structural integrity of the filter element 15 can be judged by observing the generation of bubbles on the water surface. The device has a simple structure and is easy to disassemble, and it is easy to implement multiple structural integrity tests on different or repeated identical filter elements 15.

[0020] Specifically, an air duct 24 is opened in the middle of the test model 10, and the air duct 24 axially penetrates the test model 10. The test model 10 is opened on the outer periphery of the upper side of the air duct to provide a countersunk hole 25 for installing the filter element 15. A sealing gasket 16 is installed in the countersunk hole 25, and the filter element 15 is installed on the sealing gasket 16. The diameter of the duct of the test model 10 is equal to the diameter of the filter element 15 to prevent airflow instability due to structural reasons.

[0021] It can be understood that a sealing groove 14 for installing a first sealing ring 26 is further provided on the outer periphery of the counterbore 25 . The sealing groove 14 is an O-ring groove, and the first sealing ring 26 is also an O-shaped first sealing ring 26 .

[0022] Among them, the inner side of the lower end of the air channel 24 is provided with a thread, and the pneumatic hose connector is installed on the lower side of the air channel 24 through the thread. The test model is connected to the pneumatic two-piece 5 and one air source through the pneumatic hose. At the same time, a second sealing ring 28 is provided between the lower end of the air channel 24 and the pneumatic hose connector.

[0023] Specifically, the indenter 4 includes an upper column 18, a lower column 19 and four columns 20. The four columns 20 connect the upper column 18 and the lower column 19 and protrude from the bottom of the lower column 19. The test model 10 is provided with a mounting hole 27 with the same diameter as the column 20. The indenter 4 is connected to the test model 10 through the cooperation between the column 20 and the mounting hole 27.

[0024] Among them, the lower column 19 of the pressure head 4 is provided with a conical observation hole 22, and the column 20 is provided with a buckle 21, and the buckle 21 is connected to the bubble sensor 9. The bubble sensor 9 is axially aligned with the conical observation hole 22 to observe the generation of bubbles.

[0025] It can be understood that the upper cylinder 18 of the pressing head 4 is further provided with a threaded hole 23 , and the pressing head 4 is threadedly connected to the cylinder 3 through the threaded hole 23 . Example

[0026] A test method for a filter element 15 structural integrity test system, wherein the test steps are as follows: S1: Install the sealing gasket 16 and the filter element 15 to be tested; S2: Turn on the air compressor 1 and wait for the cylinder 3 to drive the pressure head 4 to extend and press the test model 10; S3: Slowly adjust the pressure reducing valve of the pneumatic second unit 5, observe the pressure gauge, and slowly increase the pressure; S4: Observe the bubble sensor 9. When the bubble sensor 9 sends a signal, stop pressurizing, record the bubbling pressure and locate the bubbling point; S5: Turn the two-position three-way manual reversing valve 6, the cylinder 3 drives the pressure head 4 to retract, take out the filter element 15, and place it under the electron microscope 8; S6: observe and measure the bubbling site, take microscopic photos, and process the image data using computer 7; S7: Determine the structural integrity of the filter element 15 by combining the bubbling pressure and the filter element microscopic image data in S4 and S6.

[0027] The test principle is as follows: install the sealing gasket 16 used to seal and prevent air leakage and the filter element 15 to be tested on the test model 10, place it in the pressure head 4, turn on the air compressor 1, at this time the pneumatic two-way component 5 is in the closed state, wait for the piston rod of the cylinder 3 to drive the pressure head 4 to extend and press the test model 10. Slowly open and adjust the pressure reducing valve of the pneumatic two-way component 5, input the pressurized gas into the test model 10 through the pneumatic pipe joint 17, observe the pressure instrument, and slowly increase the pressure; observe the bubble sensor 9, when the bubble sensor 9 sends a signal, stop increasing the pressure, record the bubbling pressure and locate the bubbling point; turn the two-position three-way manual reversing valve 6, retract the piston rod of the cylinder 3, directly remove the filter element 15 to be tested, and place it under the electron microscope 8; observe and measure the bubbling part, take a microscopic picture, and process the image data; combine the previously observed bubbling pressure and the microscopic image data of the filter element to judge the structural integrity of the filter element 15.

[0028] In addition to the above-mentioned preferred embodiments, the present invention has other implementation modes. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A filter element structural integrity test system, characterized in that: The invention comprises an air compressor (1) and a three-way pipe joint (2) connected to the air compressor (1), wherein the three-way pipe joint (2) comprises a first air source (29) and a second air source (30), wherein the first air source (29) is connected to a pneumatic two-way joint (5) and a test model (10) in sequence, wherein the test model (10) is mounted on a bracket (11), wherein the bracket (11) is hung below a stand (12), wherein a cylinder (3) is provided on the stand (12), wherein the cylinder (3) is connected to a pressure head (4), wherein the stand (12) is arranged above a water tank (13), wherein the test model (10) is sunk into the water tank (13), wherein the second air source (30) is connected to a two-position three-way manual reversing valve (6), wherein the two-position three-way manual reversing valve (6) is connected to the cylinder (3) and controls the rise and fall of the pressure head (4) through the cylinder (3), so that the pressure head (4) presses the test model (10).

2. The filter element structural integrity testing system according to claim 1, characterized in that: An air duct (24) is provided in the middle of the test model (10), the air duct (24) axially penetrating the test model (10), and a countersunk hole (25) for installing a filter element (15) is provided on the outer periphery of the upper side of the air duct (24) of the test model (10).

3. The filter element structural integrity testing system according to claim 2, characterized in that: A sealing groove (14) for mounting a first sealing ring (26) is provided on the outer periphery of the countersunk hole (25).

4. The filter element structural integrity testing system according to claim 2, characterized in that: A pneumatic hose connector (17) for connecting a pneumatic hose is installed on the lower side of the air duct (24), and the test model (10) is connected to the pneumatic two-way connector (5) and a gas source (29) via the pneumatic hose.

5. The filter element structural integrity testing system according to claim 2, characterized in that: A sealing gasket (16) is installed in the countersunk hole (25).

6. The filter element structural integrity testing system according to claim 1, characterized in that: The pressure head (4) comprises an upper column (18), a lower column (19) and a column (20); the column (20) connects the upper column (18) and the lower column (19) and protrudes from the bottom of the lower column (19); the test model (10) is provided with a mounting hole (27) having the same diameter as the column (20); the pressure head (4) is connected to the test model (10) through the cooperation between the column (20) and the mounting hole (27).

7. The filter element structural integrity testing system according to claim 6, characterized in that: The lower column (19) of the pressure head (4) is provided with a conical observation hole (22), the upright column (20) is provided with a buckle (21), the buckle (21) is connected to a bubble sensor (9), and the bubble sensor (9) is axially aligned with the conical observation hole (22).

8. The filter element structural integrity testing system according to claim 6, characterized in that: The upper column (18) of the pressure head (4) is provided with a threaded hole (23), and the pressure head (4) is threadedly connected to the cylinder (3) via the threaded hole (23).

9. A test method for a filter element structural integrity test system, characterized in that: The test steps are as follows: S1: Install the sealing gasket (16) and the filter element (15) to be tested; S2: Turn on the air compressor (1) and wait for the cylinder (3) to drive the pressure head (4) to extend and press the test model (10); S3: Slowly adjust the pressure reducing valve of the pneumatic second joint (5), observe the pressure instrument, and slowly increase the pressure; S4: Observe the bubble sensor (9), and when the bubble sensor (9) sends a signal, stop pressurizing, record the bubbling pressure and locate the bubbling point; S5: The two-position three-way manual reversing valve (6) is turned, and the cylinder (3) drives the pressure head (4) to retract, and the filter element (15) is taken out and placed under an electron microscope (8); S6: observe and measure the bubbling site, take microscopic photos, and process the image data using a computer (7); S7: Determine the structural integrity of the filter element (15) by combining the bubbling pressure and the filter element microscopic image data in S4 and S6.

Images