A high efficiency filter air tightness detection device and detection method

Abstract

The present invention discloses a high efficiency filter air tightness detection device and detection method in the technical field of fluid sealing detection of structural components, aiming to solve the problem of large consumption caused by direct supply of smoke to the product to be tested after smoke preparation in the prior art. It includes a detection chimney and a positioning mechanism, the detection chimney includes a smoke storage cylinder and a smoke inlet cylinder arranged below the smoke storage cylinder, a smoke outlet hole is opened on the top of the smoke storage cylinder, and a detection platform for placing high efficiency filter products is also rotatably arranged on the top surface of the smoke storage cylinder, a smoke inlet hole corresponding to the position of the smoke outlet hole is opened on the detection platform, and the positioning mechanism is used to position the high efficiency filter product on the detection platform, and the smoke storage cylinder is also connected with an air inlet pipe; the present invention is used to intercept particles at the outlet position in time when the HEPA product is not detected, so as to achieve particle saving and protection of the surrounding environment, which is conducive to reducing the consumption of particle raw materials and providing a good working environment.

Description

Technical Field

[0001] The invention relates to a high-efficiency filter air tightness detection device and a detection method, belonging to the technical field of fluid sealing detection of structural components. Background Art

[0002] A high-efficiency air filter (HEPA) is a high-efficiency air filtration device that is specifically designed to capture tiny particles and pollutants in the air. It is commonly used in air purification systems, industrial dust removal equipment, hospitals, laboratories, and other environments with high air quality requirements.

[0003] When HEPA products are produced, a folded filter paper layer is assembled on an outer frame, and then a seal between the filter paper layer and the outer frame is achieved by dispensing glue. In order to detect the sealing of the filter paper, the existing technology often uses aerosol mist or smoke detection to determine whether the product has good airtightness so that it can achieve normal filtering effect.

[0004] In the currently used flue gas detection method, the HEPA product is directly placed at the exit position of the flue gas particles or aerosol particles, and the corresponding detection mechanism (such as a photometer) is used to determine whether the gas passing through the HEPA product contains more particles, thereby determining whether the HEPA product is sealed properly. In this method, after the HEPA product is taken away, the flue gas or aerosol particles will be lost in the surrounding environment, which will not only affect the operating environment of the workshop, but also easily cause pollution to the surrounding environment (such as DOP liquid atomization being inhaled by the human body may pose a health hazard, etc.), and will also cause the particles to dissipate quickly. Re-testing requires re-preparation and accumulation of the particles to be tested, resulting in rapid consumption of raw materials for the equipment, high energy consumption of the equipment, and is not conducive to ensuring a good working environment. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a high-efficiency filter air tightness detection device and detection method, which are used to intercept particles at the outlet position in time when the HEPA product is not detected, thereby saving particles and protecting the surrounding environment, which is beneficial to reducing the consumption of particle raw materials and providing a good working environment.

[0006] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0007] On the one hand, the present invention provides a high-efficiency filter air tightness detection device, including a detection chimney and a positioning mechanism, the detection chimney including a smoke storage cylinder and a smoke inlet cylinder arranged below the smoke storage cylinder, the smoke storage cylinder and the smoke inlet cylinder are relatively fixedly arranged, and an on-off control mechanism for controlling the on-off state of the two is arranged between the smoke storage cylinder and the smoke inlet cylinder, a smoke inlet pipe is connected to the smoke inlet cylinder, a smoke outlet is opened on the top of the smoke storage cylinder, and a detection platform for placing a high-efficiency filter product is also rotatably arranged on the top surface of the smoke storage cylinder, a smoke inlet hole corresponding to the position of the smoke outlet hole is opened on the detection platform, and the detection platform can realize the connection or disconnection of the smoke inlet hole and the smoke outlet hole by rotation, and the positioning mechanism is used to position the high-efficiency filter product on the detection platform, and the smoke storage cylinder is also connected with an air inlet pipe.

[0008] Specifically, it also includes a first driving device, and the detection platform includes a rotating drum part mounted above the smoke storage cylinder and a platform part connected to the rotating drum part. The smoke inlet is arranged on the platform part, and the first driving device is used to drive the rotating drum part to rotate so that the smoke inlet can be connected and disconnected with the smoke outlet.

[0009] Specifically, the smoke storage cylinder and the smoke inlet cylinder are both cylindrical, and matching connecting holes are provided at relative positions of the smoke storage cylinder and the smoke inlet cylinder. The on-off control mechanism includes a second driving device and an on-off disk rotatably arranged between the smoke storage cylinder and the smoke inlet cylinder, and the on-off disk is provided with a connecting port that can match the connecting hole. The second driving device is used to drive the on-off disk to rotate so that the connecting port on the on-off disk can be connected and disconnected with the connecting holes on both sides. The on-off disk is rotatably sealed with the smoke storage cylinder and the smoke inlet cylinder, and the smoke storage cylinder and the smoke inlet cylinder can only be connected through the connecting port.

[0010] Specifically, it also includes a control module and a smoke hood, the control module can be used to control the smoke hood to be buckled above the detection platform, the smoke hood is provided with a connecting pipe, the connecting pipe is externally connected to the smoke detection mechanism, and the positioning mechanism is arranged inside the smoke hood.

[0011] Specifically, the control module includes a vertical moving module, a rotation moving module and a clamping module. The clamping part of the clamping module is provided with a clamping plate for clamping the smoke hood. The vertical moving module and the rotation moving module are respectively used to control the movement and rotation of the smoke hood.

[0012] Specifically, the positioning mechanism comprises a cylinder fixedly provided with the smoke hood surface, and a pressing plate for pressing the high-efficiency filter product is provided at the output end of the cylinder.

[0013] Specifically, there are no less than two groups of positioning mechanisms, and at least two groups of positioning mechanisms are correspondingly arranged on both sides of the high-efficiency filter product. The structure of the pressure plate is L-shaped as a whole. The pressure plate and the output shaft of the cylinder are movably connected. A limit strip is also fixedly arranged inside the smoke hood, and a limit groove is provided on the limit strip. One end of the pressure plate is provided with a shaft rod, and the shaft rod can slide in the limit groove. When the cylinder drives the pressure plate to descend, the shaft rod can contact the bottom end of the limit groove to drive the corner part of the pressure plate to press the right-angled edge of the top side of the high-efficiency filter product. When the cylinder drives the pressure plate to rise, the shaft rod can contact the top end of the limit groove to drive the pressure plate to release the high-efficiency filter product.

[0014] Specifically, a protruding plate is provided at one end of the pressure plate away from the limiting bar, an elastic layer is provided on the surface of the pressure plate close to the high-efficiency filter, the protruding plate and the output shaft of the cylinder are horizontally slidably connected, and the limiting groove is generally "Z"-shaped. The limiting groove can allow the shaft rod on the pressure plate to move in the horizontal and vertical directions through the "Z"-shaped guide.

[0015] On the other hand, the present invention provides a method for detecting air tightness of a high efficiency filter, using the above-mentioned high efficiency filter air tightness detection device, the method comprising the following steps:

[0016] Place the high-efficiency filter product on the testing platform, and rotate the testing platform after placing the product so that the smoke inlet on the testing platform is connected with the smoke outlet on the smoke storage cylinder;

[0017] The smoke hood is buckled on the testing platform to cover the high-efficiency filter product;

[0018] Press and fix the high-efficiency filter products;

[0019] Open the air inlet pipe to introduce pressurized gas into the smoke storage cylinder;

[0020] Detect the smoke discharge status of the connecting pipe;

[0021] After the test is completed, release the smoke hood and rotate the test platform to disconnect the smoke inlet on the test platform from the smoke outlet on the smoke storage cylinder;

[0022] Remove the HEPA product after removing the hood.

[0023] Specifically, before removing the fume hood, the method further includes the steps of: lifting the fume hood and simultaneously lifting the high efficiency filter product, and extracting the gas inside the fume hood through the connecting pipe.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The air tightness detection device provided by the present invention can selectively open and close the smoke particles under the HEPA product before and after the HEPA product is placed, and can timely form a corresponding storage cavity for retaining smoke particles when not detecting, so as to prevent smoke particles from drifting in the detection environment, saving resources and reducing the impact on the surrounding working environment. The device also uses an air intake pipe to pressurize the smoke storage area, so that smoke particles can quickly pass through the HEPA product to achieve rapid detection of the HEPA product, without the need for additional smoke preparation and can speed up the smoke flow rate, which is conducive to improving the detection efficiency of the HEPA product.

[0026] The air tightness detection device and method provided by the present invention adopts a smoke hood to perform the test. After the test, the smoke hood and the HEPA product can be lifted up to remove the smoke under the HEPA product, which is beneficial to further improve the safety of the surrounding working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the overall structure of the airtightness detection device provided by an embodiment of the present invention;

[0028] Figure 2 is a partial structural schematic diagram of an airtightness detection device provided in an embodiment of the present invention;

[0029] Figure 3 is another partial schematic diagram of the airtightness detection device provided by an embodiment of the present invention;

[0030] Figure 4 is a side view of an airtightness detection device provided by an embodiment of the present invention;

[0031] Figure 5 The present invention Figure 4 A cross-sectional view of the airtightness detection device provided in the embodiment along the AA direction;

[0032] Figure 6 The present invention Figure 5 An enlarged view of the structure at position C of the airtightness detection device provided in the embodiment;

[0033] Figure 7 is a schematic diagram of the structure of the on-off disc provided in an embodiment of the present invention;

[0034] Figure 8 The present invention Figure 4 A BB-direction cross-sectional view of the airtightness detection device provided in the embodiment;

[0035] Fig. 9 is a front view of an airtightness detection device provided by an embodiment of the present invention;

[0036] Fig.10It is a schematic diagram of another movable connection mode between the cylinder and the pressing plate provided by the present invention;

[0037] Fig.11 is another state diagram of the movable connection between the cylinder and the pressing plate provided by the present invention;

[0038] Figure numerals: 1. detection chimney; 101. smoke storage cylinder; 102. chimney; 2. smoke inlet pipe; 3. detection platform; 4. first drive device; 5. on-off disk; 6. second drive device; 7. air inlet pipe; 8. pressure gauge; 9. smoke hood; 10. control module; 1001. vertical moving module; 1002. rotational moving module; 1003. clamping module; 1004. clamping plate; 11. cylinder; 12. connecting pipe; 13. limit strip; 14. pressure plate; 15. output shaft; 16. raised plate. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances. Example

[0042] The embodiment of the present invention provides a high efficiency filter air tightness detection device, which is used to intercept particles at the outlet position in time when the HEPA product is not detected, so as to save particles and protect the surrounding environment, which is beneficial to reduce the consumption of particle raw materials and provide a good working environment. In order to realize the structural function of the device, the device is provided here including a detection chimney 1 and a positioning mechanism, specifically, as Figure 3 and Figure 5As shown, the detection smoke tube 1 includes a smoke storage tube 101 and a smoke inlet tube 102 arranged below the smoke storage tube 101, wherein the smoke storage tube 101 and the smoke inlet tube 102 are relatively fixedly arranged, and an on-off control mechanism for controlling the on-off state of the smoke storage tube 101 and the smoke inlet tube 102 is arranged between the smoke storage tube 101 and the smoke inlet tube 102. It can also be understood that the smoke storage tube 101 and the smoke inlet tube 102 are a whole with each other. At this time, the on-off control mechanism should be equivalent to a valve or other equipment used to control the connection state of the controller. In order to transfer smoke gas (such as aerosol atomized by PAO liquid, or aerosol atomized by DOP liquid, or aerosol atomized by chemical The smoke generated by the smoke generator is introduced into the device for testing the high-efficiency filter product. Here, a smoke inlet pipe 2 is connected to the smoke inlet tube 102, and the smoke inlet pipe 2 can be directly connected to the corresponding smoke generating device. The generated smoke can be collected and enter the interior of the detection smoke tube 1. When the smoke-containing gas has a certain flow rate, in order to avoid the internal pressure of the cylinder being unable to meet the smoke entry, an exhaust port can also be set below the smoke inlet tube 102 to avoid the influence of air pressure causing the smoke-containing gas to be unable to enter. In order to test the high-efficiency filter product, a smoke outlet is opened at the top of the smoke storage tube 101. The smoke storage tube 1 The top surface of 01 is also rotatably provided with a detection platform 3 for placing a high-efficiency filter product, and a smoke inlet hole corresponding to the position of the smoke outlet hole is opened on the detection platform 3, so that the detection platform 3 can realize the connection or disconnection of the smoke inlet hole and the smoke outlet hole by rotation. Through this arrangement, when the smoke is detected, the smoke is connected through the smoke inlet hole and the smoke outlet hole, so that the smoke can pass through the high-efficiency filter from the detection smoke tube 1 for detection, and the positioning mechanism is used to position the high-efficiency filter product on the detection platform 3. The high-efficiency filter and the detection platform 3 have obvious elastic sealing contact surfaces to avoid the detection platform The air leakage between the platform 3 and the high-efficiency filter affects the detection effect. In order to allow the smoke to pass through the high-efficiency filter product smoothly, an air intake pipe 7 can be connected to the smoke storage cylinder 101, wherein the air intake pipe 7 is used to increase the pressure in the chamber of the smoke inlet 102, so that a significant pressure difference can be formed on both sides of the high-efficiency filter, so that the smoke-containing gas can pass through the high-efficiency filter quickly, and the rapid circulation detection of the smoke can be realized, which helps to improve the detection rate. In order to facilitate direct observation of whether the test pressure in the smoke storage cylinder 101 reaches the normal value, a pressure gauge 8 can be provided on it, and the pressure can be adjusted by feedback. Through the setting of the above-mentioned mechanism, the retention capacity of the smoke below the high-efficiency filter during detection can be selectively switched, and the generated smoke can be temporarily stored in time when not detecting, and it can be supplied after waiting for the next high-efficiency filter product to arrive, which is conducive to reducing the demand for smoke and reducing resource consumption. In addition, it can also avoid the test smoke from directly dissipating in the working environment after the high-efficiency filter product is taken away, affecting the surrounding working environment.In order to improve the retention capacity of smoke in the smoke storage cylinder 101 , a heating mechanism (not shown in the figure) can be provided above the smoke storage cylinder 101 , which can delay the attachment of aerosol particle-type smoke, thereby improving the retention effect of smoke in the smoke storage cylinder 101 .

[0043] The embodiment of the present invention provides a high efficiency filter air tightness detection device. In order to realize the opening and closing of the air inlet and the air outlet, the device is provided here also includes a first driving device 4, and the detection platform 3 is provided including a rotating drum part sleeved above the smoke storage cylinder 101 and a platform part connected to the rotating drum part, such as Figure 2 and Figure 3 As shown, the smoke inlet is arranged on the platform part, and the first driving device 4 is used to drive the drum part to rotate so that the smoke inlet can be connected and disconnected with the smoke outlet position. Preferably, the transmission can be carried out by connecting with the pulley assembly as shown in the figure, and other means are not limited here.

[0044] The embodiment of the present invention provides a high efficiency filter air tightness detection device, specifically provides a control mechanism for controlling the on-off control mechanism for controlling the smoke storage cylinder 101 to perform its normal smoke retention function. As a preferred technical solution of this embodiment, the smoke storage cylinder 101 and the smoke inlet cylinder 102 are both cylindrical. Specifically, matching connecting holes are opened at the relative positions of the smoke storage cylinder 101 and the smoke inlet cylinder 102, such as Figure 5 as well as Figure 8 As shown, the on-off control mechanism includes a second driving device 6 and an on-off disk 5 rotatably arranged between the smoke storage cylinder 101 and the smoke inlet cylinder 102, and a connecting port that can match the connecting hole is opened on the on-off disk 5, wherein the second driving device 6 is used to drive the on-off disk 5 to rotate, and a belt drive method can be adopted so that the connecting port on the on-off disk 5 can be connected and disconnected with the connecting holes on both sides. In order to ensure the sealing effect, the on-off disk 5 and the smoke storage cylinder 101 and the smoke inlet cylinder 102 should be in a rotating sealing setting state, and the smoke storage cylinder 101 and the smoke inlet cylinder 102 can only be connected through the connecting port, so as to prevent the collected smoke from leaking from the connecting hole.

[0045] An embodiment of the present invention provides a high-efficiency filter air tightness detection device. In order to prevent smoke from leaking from above the high-efficiency filter product and affecting the surrounding environment, the device is also provided with a control module 10 and a smoke hood 9, wherein the control module 10 can be used to control the smoke hood 9 to be buckled above the detection platform 3. In order to ensure the normal outflow of smoke, a connecting pipe 12 is provided on the smoke hood 9, wherein the connecting pipe 12 is externally connected to a smoke detection mechanism. In this embodiment, the smoke hood 9 is made of a transparent material. For simple visual inspection, it is sufficient to directly determine whether there is smoke in the smoke hood 9. For other more precise inspections, the gas flowing out of the connecting pipe 12 can be illuminated by a photometer or the like, and then the intensity of the refracted light source can be detected. This detection method is a prior art.

[0046] An embodiment of the present invention provides a high-efficiency filter air tightness detection device, which specifically provides a structural action mode of a control module 10. Specifically, the control module 10 is provided here to include a vertical moving module 1001, a rotating moving module 1002 and a clamping module 1003, wherein the clamping part of the clamping module 1003 is provided with a clamping plate 1004 for clamping the smoke hood 9, and the vertical moving module 1001 and the rotating moving module 1002 are respectively used to control the movement and rotation of the smoke hood 9. The structural combination mode is not limited, and can be referred to Figure 3 shown.

[0047] A high-efficiency filter air tightness detection device provided in an embodiment of the present invention specifically provides a positioning mechanism for positioning the high-efficiency filter under the smoke hood 9, wherein the positioning mechanism includes a cylinder 11 fixedly provided with the surface of the smoke hood 9, and the output end of the cylinder 11 is provided with a pressing plate 14 for pressing the high-efficiency filter product, and the surface of the high-efficiency filter is pressed by the pressing plate 14 so that the high-efficiency filter product can form a good sealing contact with the detection platform 3. Furthermore, in order to expand the function of the pressing plate 14, no less than two groups of positioning mechanisms can be set, wherein at least two groups of positioning mechanisms are correspondingly set on both sides of the high-efficiency filter product. Specifically, the structure of the pressing plate 14 is set here in an L-shape as a whole, and the pressing plate 14 and the output shaft 15 of the cylinder 11 are movably connected, and its movable mode can refer to Figure 6As shown, specifically, the pressing plate 14 can be in a rotational relationship with the output shaft 15 of the cylinder 11, and can also slide relative to each other at its connection position through a U-shaped groove (the U-shaped groove is arranged on the pressing plate 14) and a sliding shaft arranged in the U-shaped groove (in this case, the sliding shaft is fixedly connected to the output shaft 15 of the cylinder 11 and is used to slide in the U-shaped groove). A limiting strip 13 is also fixedly arranged inside the smoke hood 9, and a limiting groove is arranged on the limiting strip 13. An axle rod is arranged at one end of the pressing plate 14 so that the axle rod can slide in the limiting groove. Regarding the length and position relationship of the limiting groove, when the cylinder 11 drives the pressing plate 14 to descend, it can drive the corner part of the pressing plate 14 to buckle the right-angled side of the top side of the high-efficiency filter product after the axle rod contacts the bottom end of the limiting groove, and at the same time, when the cylinder 11 drives the pressing plate 14 to rise, it can drive the pressing plate 14 to release the high-efficiency filter product after the axle rod contacts the top end of the limiting groove. Continue to press Figure 6 As shown in the figure, the pressure plate 14 first moves downward in an open state. After the cylinder 11 drives the pressure plate 14 to reach the bottom position, the shaft rod at the end of the pressure plate 14 reaches the bottom of the limit groove. As the cylinder 11 continues to move, the other end of the pressure plate 14 will continue to fall and deflect, thereby pressing and holding the high-efficiency filter (a more precise setting of the matching size is required, and the matching size requirement can be reduced by an elastic pad). When the cylinder 11 drives its output shaft 15 to rise, the U-shaped groove part drives the pressure plate 14 as a whole to be subjected to an upward force, driving the pressure plate 14 to move upward as a whole while maintaining the clamping state of the high-efficiency filter. The movement range is until the shaft rod moves to the top of the limit groove, and the sliding shaft in the U-shaped groove slides relative to the U-shaped groove, so that the originally clamped part becomes a loose state, thereby realizing the loosening action of the high-efficiency filter, so that it can be placed on the detection platform 3 after the detection is completed; as shown in the figure Figure 6As shown, in order to avoid the U-shaped groove and the sliding shaft connected to the output shaft 15 slipping and releasing the high-efficiency filter product at the beginning of the upward drive, a corresponding friction or damping part can be set on the side wall of the U-shaped groove. Specifically, the two sides of the U-shaped groove can be set as wavy patterns (not shown in the figure), etc. Through this design, the output shaft 15 can first fall into the wavy patterns of the U-shaped groove when rising, and the wavy patterns form resistance to the sliding shaft. At this time, the shaft rod in the limiting groove where the limiting strip 13 is located has no obvious resistance, so the entire plate body of the pressure plate 14 can be lifted without a deflection amplitude. At this time, the diameter of the sliding shaft should be smaller than the minimum width of the U-shaped groove, so that after the shaft rod moves to the top of the limiting groove, the sliding shaft can continue to move upward across the narrowest gap of the U-shaped groove, and after the shaft rod hits the top of the limiting groove, the output shaft 15 continues to move upward to cause the sliding shaft to slip relative to the U-shaped groove, thereby realizing a change in the angle of the pressure plate 14. Through this arrangement, in addition to pressing and fixing the high-efficiency filter product itself, the high-efficiency filter can also be lifted and lowered through a fixed process. In this way, after the smoke detection, part of the smoke will be trapped in the cavity area formed by the bottom of the high-efficiency filter product and the detection platform 3. The mechanism arranged in this way can release the cavity where the smoke is trapped by lifting the high-efficiency filter, and the connecting pipe 12 can be used to extract the residual smoke. It should be noted that when exhausting, the smoke hood 9 can be slightly lifted to accelerate the inflow of surrounding air and remove the smoke gas retained under the high-efficiency filter product.

[0048] In some other embodiments, if you want to clamp and lift the high-efficiency filter product, you can also directly set the cylinder 11 on the side walls on both sides of the smoke hood 9. At this time, only one pressure plate 14 needs to be set at the output end of each cylinder 11 to clamp the high-efficiency filter product.

[0049] In some other embodiments, the movable connection between the output end of the cylinder 11 and the pressing plate 14 can also refer to Fig.10 As shown, the limiting groove is set in a "Z" shape as a whole, and a protruding plate 16 is provided on the pressing plate 14. The protruding plate 16 and the end of the output shaft 15 of the cylinder 11 are horizontally slidably connected by a sliding rod. When the cylinder drives the output shaft 15 to rise and fall, the pressing plate 14 will rise and fall together with the output shaft 15. A shaft rod that can slide in the limiting groove is provided on the left side of the pressing plate 14. When the pressing plate 14 is raised and lowered, the shaft rod fixedly connected to the pressing plate 14 will deviate left and right in the limiting groove through the guiding effect, so that the pressing plate 14 can move freely left and right while being lifted and lowered vertically, and when it is close to the wall of the high-efficiency filter product, the elastic layer on the pressing plate 14 can hold the high-efficiency filter product tightly. The position change of the mechanism action state can be referred to Fig.10 as well as Fig.11 As shown, in Fig.10 In the figure, the shaft rod is located at the right end of the "Z"-shaped limiting groove, and the pressure plate 14 tends to move away as a whole. During the descending process, the pressure plate 14 will gradually descend and approach the high-efficiency filter after the shaft rod moves to the left end of the "Z"-shaped limiting groove, and the elastic layer is in close contact with the surface of the high-efficiency filter to achieve a clamping action on the high-efficiency filter, driving the pressure plate 14 to continue to move downward. At this time, the elastic layer has formed a close contact with the side wall of the high-efficiency filter. In order to avoid obstruction and wear of the elastic layer, a wear-resistant rubber material such as nitrile rubber or polyurethane elastomer can be used. By continuing to descend the pressure plate 14, the elastic layer can increase the contact area with the side wall of the high-efficiency filter, thereby deepening the clamping range of the side wall of the high-efficiency filter and providing greater friction (so that the high-efficiency filter can be lifted when it is driven to rise), and finally the corner of the L-shaped pressure plate 14 is matched with the corner of the high-efficiency filter for pressure holding contact. At this time, the elastic layer can provide sufficient friction and prevent pressure loss caused by hard contact. Similarly, when the cylinder 11 drives the pressure plate 14 to rise, it can first lift the high-efficiency filter to a certain height in a holding state, until the shaft rod at the end of the pressure plate 14 moves to the right end of the "Z"-shaped limit groove, and then drives the pressure plate 14 to move to the right as a whole, thereby releasing the high-efficiency filter. That is, through the reciprocating action of the cylinder 11, the high-efficiency filter can be pressed, lifted and released, which is convenient to operate and simplifies the control process.

[0050] It should be noted that, in this embodiment, the cylinder 11 controls the air intake volume through its air pressure regulating valve, thereby controlling the extension and retraction speed of the controller, which is convenient for controlling the time when the filter is clamped and released by the pressure plate, so as to cooperate well with the air extraction of the connecting pipe 12.

[0051] An embodiment of the present invention provides a high efficiency filter air tightness detection device, in order to improve the adaptability of the above-mentioned pressing plate 14, such as Fig.11 As shown, a flexible pad can be provided at the inner corner of the pressure plate 14. Specifically, the inclination angle of the outer surface of the flexible pad is matched with the actual inclination angle of the pressure plate 14 holding the high-efficiency filter product, thereby increasing the fault tolerance of the contact with the high-efficiency filter product. The flexible pad can increase the holding effect on the high-efficiency filter and can avoid, to a certain extent, loosening from the high-efficiency filter when just moving upward. Example

[0052] An embodiment of the present invention provides a method for detecting air tightness of a high efficiency filter, using the air tightness detection device for the high efficiency filter in the first embodiment, and the method comprises the following steps:

[0053] Place a high efficiency filter product on the detection platform 3, and rotate the detection platform 3 after placing the product, so that the smoke inlet on the detection platform 3 is connected with the smoke outlet on the smoke storage cylinder 101;

[0054] The smoke cover 9 is buckled on the detection platform 3 to cover the high-efficiency filter product. By covering the periphery, the smoke to be detected cannot be dispersed to the surrounding environment. At this time, the connecting pipe 12 can achieve the collection effect of the smoke, which is also more conducive to subsequent detection work (this step can also be located before opening the gas path of the detection platform 3, so that the test can be carried out under the condition that the high-efficiency filter product is sealed);

[0055] The high-efficiency filter product is buckled and fixed to ensure that there is no gap between it and the detection platform 3, so as to ensure that the smoke being detected can act on the high-efficiency filter product itself instead of floating around;

[0056] Open the air inlet pipe 7 to introduce pressurized gas into the smoke storage cylinder 101, increase the pressure to form a pressure difference with the smoke cover 9, thereby accelerating the passage of smoke gas and improving the detection rate;

[0057] Detect the smoke output state of the connecting pipe 12. The specific detection method is not limited. It is preferred to use a photometer to measure the actual content of the smoke, which helps to more accurately determine whether the product is qualified;

[0058] After the detection is completed, the smoke hood 9 is released, and the detection platform 3 is rotated so that the smoke inlet on the detection platform 3 is disconnected from the smoke outlet on the smoke storage cylinder 101. The smoke hood 9 and the detection platform 3 rotate simultaneously, so that the smoke storage cylinder 101 can retain more smoke inside it, waiting for the next quick standby, and at the same time helps to improve the detection rate;

[0059] After removing the smoke hood 9, remove the high efficiency filter product and wait for the next test. When removing the smoke hood 9, the control module 10 needs to clamp the smoke hood 9 again. Since the smoke hood 9 has been rotated, in order to allow the control module 10 to adapt to the smoke hood 9 and continue to clamp it, the rotation angle of the detection platform 3 can be adjusted to match the shape of the smoke hood 9, such as Figure 1 , Figure 2 and Figure 3 As shown, when the smoke hood 9 is a rectangular parallelepiped as a whole, the detection platform 3 can be controlled to rotate at an angle of 90° to achieve on and off, so that the smoke hood 9 can be adapted to the clamping part. Similarly, when the outer surface of the smoke hood 9 is other polygons, after controlling the detection platform 3 to rotate, the clamped surface of the polygon can also be adapted to the clamping part.

[0060] The air tightness detection method of a high-efficiency filter provided by an embodiment of the present invention further includes the step of lifting the high-efficiency filter product in the smoke hood 9 and extracting the gas inside the smoke hood 9 through the connecting pipe 12 before removing the smoke hood 9. In this step, the detection platform 3 is controlled to rotate 90° relative to the smoke storage cylinder 101, so that it and the smoke storage cylinder 101 are relatively sealed and do not affect the later control module 10 clamping the smoke hood 9, so that the smoke in the smoke storage cylinder 101 will not affect the gas inside the smoke hood 9 extracted by the connecting pipe 12. Specifically, the high-efficiency filter is slightly lifted by utilizing the pressing plate 14 and its linkage mechanism, and then the smoke hood 9 is slightly lifted by utilizing the control module 10 (a small gap can be maintained). Thus, while the connecting pipe 12 exhausts smoke from the smoke hood 9, surrounding air can be sucked into the smoke hood 9 from the outside (avoiding the creation of a negative pressure environment in the smoke hood 9, which is not only not conducive to exhausting smoke, but also affects the subsequent lifting of the smoke hood 9 by the control module 10), thereby taking away the residual smoke under the high-efficiency filter, which helps to more completely absorb harmful gases such as smoke, and further ensures a good working environment around.

[0061] The method of clamping and releasing the above-mentioned pressing plate 14 can refer to the part shown in the first embodiment, and utilizes the reciprocating push of the cylinder 11 and the coordination between the structures so that the output shaft 15 can automatically change its inclination angle when driving the pressing plate 14 to rise and fall, thereby clamping the high-efficiency filter while pressing and fixing it. When the output shaft 15 rises, the clamping state is maintained to lift the high-efficiency filter to a certain height, and then the pressing plate 14 is opened to release the high-efficiency filter, thereby simplifying the grabbing action mode, simplifying the mechanism setting, and facilitating the discharge of residual smoke under the high-efficiency filter.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A high efficiency filter air tightness detection device, characterized in that: The invention comprises a detection chimney (1) and a positioning mechanism, wherein the detection chimney (1) comprises a smoke storage cylinder (101) and a smoke inlet cylinder (102) arranged below the smoke storage cylinder (101), the smoke storage cylinder (101) and the smoke inlet cylinder (102) being relatively fixedly arranged, an on-off control mechanism for controlling the on-off state of the smoke storage cylinder (101) and the smoke inlet cylinder (102) being arranged between the smoke storage cylinder (101) and the smoke inlet cylinder (102), a smoke inlet pipe (2) being arranged on the smoke inlet cylinder (102), and the top of the smoke storage cylinder (101) being opened. A smoke outlet is provided, and a detection platform (3) for placing a high-efficiency filter product is rotatably provided on the top surface of the smoke storage cylinder (101), a smoke inlet hole corresponding to the position of the smoke outlet is provided on the detection platform (3), and the detection platform (3) can achieve communication or disconnection between the smoke inlet hole and the smoke outlet by rotating, and the positioning mechanism is used to position the high-efficiency filter product on the detection platform (3), and an air inlet pipe (7) is also connected to the smoke storage cylinder (101); The smoke storage cylinder (101) and the smoke inlet cylinder (102) are both cylindrical, and matching communication holes are provided at positions where the smoke storage cylinder (101) and the smoke inlet cylinder (102) are opposite to each other. The on-off control mechanism comprises a second driving device (6) and an on-off disk (5) rotatably arranged between the smoke storage cylinder (101) and the smoke inlet cylinder (102), and the on-off disk (5) is provided with a communication port that can match the communication hole. The second driving device (6) is used to drive the on-off disk (5) to rotate so that the communication port on the on-off disk (5) can be connected and disconnected with the communication holes on both sides. The on-off disk (5) is rotatably sealed with the smoke storage cylinder (101) and the smoke inlet cylinder (102), and the smoke storage cylinder (101) and the smoke inlet cylinder (102) can only be connected through the communication port.

2. A high efficiency filter air tightness detection device according to claim 1, characterized in that: It also includes a first driving device (4), the detection platform (3) includes a rotating drum portion sleeved above the smoke storage cylinder (101) and a platform portion connected to the rotating drum portion, the smoke inlet hole is arranged on the platform portion, and the first driving device (4) is used to drive the rotating drum portion to rotate so that the smoke inlet hole can be connected and disconnected with the smoke outlet hole.

3. A high efficiency filter air tightness detection device according to claim 2, characterized in that: It also comprises a control module (10) and a smoke hood (9), wherein the control module (10) can be used to control the smoke hood (9) to be buckled above the detection platform (3), the smoke hood (9) is provided with a connecting pipe (12), the connecting pipe (12) is externally connected to a smoke detection mechanism, and the positioning mechanism is arranged inside the smoke hood (9).

4. A high efficiency filter air tightness detection device according to claim 3, characterized in that: The control module (10) comprises a vertical moving module (1001), a rotation moving module (1002) and a clamping module (1003); a clamping portion of the clamping module (1003) is provided with a clamping plate (1004) for clamping the smoke hood (9); and the vertical moving module (1001) and the rotation moving module (1002) are respectively used to control the movement and rotation of the smoke hood (9).

5. A high efficiency filter air tightness detection device according to claim 4, characterized in that: The positioning mechanism comprises a cylinder (11) fixedly provided with the surface of the smoke hood (9), and a pressing plate (14) for pressing the high-efficiency filter product is provided at the output end of the cylinder (11).

6. A high efficiency filter air tightness detection device according to claim 5, characterized in that: There are no less than two groups of positioning mechanisms, and at least two groups of positioning mechanisms are correspondingly arranged on both sides of the high-efficiency filter product. The structure of the pressing plate (14) is L-shaped as a whole. The pressing plate (14) and the output shaft (15) of the cylinder (11) are movably connected. A limit strip (13) is also fixedly arranged inside the smoke hood (9). A limit groove is provided on the limit strip (13). One end of the pressing plate (14) is provided with a shaft rod, and the shaft rod can slide in the limit groove. When the cylinder (11) drives the pressing plate (14) to descend, the shaft rod can contact the bottom end of the limit groove to drive the corner part of the pressing plate (14) to buckle the right-angled edge of the top side of the high-efficiency filter product. When the cylinder (11) drives the pressing plate (14) to rise, the shaft rod can contact the top end of the limit groove to drive the pressing plate (14) to release the high-efficiency filter product.

7. A high efficiency filter air tightness detection device according to claim 6, characterized in that: A protruding plate (16) is provided at one end of the pressing plate (14) away from the limiting strip (13); an elastic layer is provided on the surface of the pressing plate (14) close to the high-efficiency filter; the protruding plate (16) and the output shaft (15) of the cylinder are horizontally slidably connected; the limiting groove is in a "Z" shape as a whole; the limiting groove can allow the shaft on the pressing plate (14) to move in the horizontal and vertical directions through the "Z"-shaped guide.

8. A method for detecting air tightness of a high efficiency filter, using the air tightness detection device for a high efficiency filter as claimed in any one of claims 4 to 7, characterized in that: The method comprises the following steps: Placing a high-efficiency filter product on the detection platform (3), and rotating the detection platform (3) after the product is placed, so that the smoke inlet hole on the detection platform (3) is connected to the smoke outlet hole on the smoke storage cylinder (101); The smoke hood (9) is buckled onto the detection platform (3) to cover the high-efficiency filter product; Press and fix the high-efficiency filter products; Opening the air inlet pipe (7) to introduce pressurized gas into the smoke storage cylinder (101); Detecting the smoke emission status of the connecting pipe (12); After the detection is completed, the smoke hood (9) is released, and the detection platform (3) is rotated so that the smoke inlet hole on the detection platform (3) is disconnected from the smoke outlet hole on the smoke storage cylinder (101); Remove the smoke hood (9) and then remove the high efficiency filter product.

9. A high efficiency filter air tightness detection method according to claim 8, characterized in that: Before removing the smoke hood (9), the method further comprises the steps of: lifting the smoke hood (9) and simultaneously lifting the high-efficiency filter product, and extracting the gas inside the smoke hood (9) through the connecting pipe (12).

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