A multi-layer screen damage detection device and method

Abstract

The present invention discloses a multi-layer screen damage detection device and method, belonging to the technical field of screen detection. It includes a base, a fixed seat, a driving motor, a detection main body, a flipping connecting plate, a screen installation frame, a screen and a bottom plate. The base is arranged in a hollow cylindrical shape, the fixed seat is relatively fixedly arranged at the end of the base, the detection main body is arranged inside the base, the flipping connecting plate is fixed at the opposite end of the detection main body, the flipping connecting plate is rotationally connected with the fixed seat, the driving motor is fixed on the fixed seat and is power-connected to the rotating shaft of the flipping connecting plate. A detection cavity penetrating the detection main body is formed on the detection main body, a limiting block is fixedly arranged on the inner wall of the detection cavity, the screen installation frame is arranged inside the detection cavity and abuts against the limiting block, and one end of the screen installation frame close to the base is bent towards the inside of the screen installation frame. The present invention does not require manual visual inspection of the screen, and has high detection efficiency and high accuracy.

Description

Technical Field

[0001] The present invention relates to a multi-layer screen damage detection device and method, belonging to the technical field of screen detection. Background Art

[0002] The screen is made of metal or non-metal such as rubber and polyurethane materials. According to the working conditions, the screen has screen holes with different apertures to let the materials smaller than the aperture pass through, and the materials larger than the aperture cannot pass through the screen, so as to achieve the purpose of material screening.

[0003] During the process of material screening, multiple different screens are usually required for screening. Therefore, multi-layer screens need to be used for screening. After long-term use of the multi-layer screens, some of the middle screens may be damaged. Therefore, it is necessary to regularly detect whether the screens are damaged. Conventional detection methods mostly use visual inspection or electron microscopy, that is, technicians conduct a comprehensive inspection of the multi-layer screens by direct observation or electronic endoscope. This will result in low detection efficiency and is likely to miss the damaged points of the screens, leading to the problem of low detection accuracy of conventional detection methods. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to provide a multi-layer screen damage detection device and method, which solves the problems of low detection efficiency and low detection accuracy in the prior art.

[0005] The technical problem to be solved by the present invention is achieved by the following technical solutions: A multi-layer screen damage detection device includes a base, a fixed seat, a driving motor, a detection main body, a flipping connecting plate, a screen mounting frame, a screen, and a bottom plate. The base is arranged in a hollow cylindrical shape. The fixed seat is relatively fixedly arranged at the end of the base. The detection main body is arranged inside the base. The flipping connecting plate is fixed at the opposite end of the detection main body. The flipping connecting plate is rotatably connected to the fixed seat. The driving motor is fixed on the fixed seat and is power-connected to the rotating shaft of the flipping connecting plate. A detection cavity penetrating the detection main body is provided on the detection main body. A limiting block is fixedly arranged on the inner wall of the detection cavity. The screen mounting frame is arranged inside the detection cavity and abuts against the limiting block. One end of the screen mounting frame close to the base bends towards the inside of the screen mounting frame. The screens are stacked at intervals inside the screen mounting frame. The bottom plate is detachably fixed at the opening of the detection cavity facing the base. A through cavity is provided on the inner wall of one side of the screen mounting frame along the radial direction of the detection main body. The through cavity corresponds to the number and position of the screens. A communication cavity is provided on the detection main body along the radial direction. The communication cavity communicates the detection cavity with the outside of the detection main body. A flexible partition plate is fixedly arranged in the communication cavity. The flexible partition plate divides the communication cavity along the axial direction of the detection main body into communication spaces with the same number as the number of screens. The communication spaces are aligned with the through cavities. A closing structure for closing the communication cavity is arranged in the communication cavity.

[0006] By adopting the above technical solution, several materials of four different sizes are poured into the detection cavity through the opening of the detection cavity far from the base. At this time, the materials will gather on the sieve inside the sieve installation frame and are sequentially filtered through multiple stacked sieves. During the filtering process, the driving motor reciprocates forward and backward, driving the detection body to make a rapid small-angle flip through the flipping connecting plate, thereby promoting the efficiency of material filtering. The smallest materials fall on the bottom plate after being filtered by the sieve near the base, and the remaining materials enter the through cavity and are introduced into the communication cavity after being screened by other sieves. When there are large-volume materials and small-volume materials coexisting in the communication cavity, it means that the sieve that can allow the small-volume materials to pass is damaged. After removing the sieve installation frame from the detection cavity, remove the multiple sieves from the sieve installation frame. At this time, find the damaged sieve and replace it. There is no need to visually inspect the sieve manually, and the detection efficiency and accuracy are high.

[0007] The present invention is further configured as follows: A rotating collection ring is sleeved outside the detection body. The rotating collection ring is rotatably connected to the detection body. A plurality of collection cavities are provided on the outer curved surface of the rotating collection ring. The plurality of collection cavities are arranged in an equiangular circumferential array with the axis of the detection body as the axis. The plurality of collection cavities can be respectively communicated with the communication cavity. A communication port is provided in the radial direction of the detection body on the collection cavity and extends away from the detection body. A sealing baffle is detachably and fixedly provided at the communication port. A plurality of hard partition plates are fixedly arranged in parallel along the axial direction of the detection body in the collection cavity. The number of hard partition plates is the same as the number of flexible partition plates. The hard partition plates can be aligned and abutted against the flexible partition plates. The plurality of hard partition plates divide the collection cavity into a plurality of collection spaces with the same number as the communication spaces along the axial direction of the detection body.

[0008] By adopting the above technical solution, the materials screened and flowing into the communication cavity flow into the collection cavity. At this time, the hard partition plates separate the screened materials to avoid re-mixing. After the screening is completed, the materials in the collection cavity can be observed by removing the sealing baffle. At this time, there is no need to clean the materials in the collection cavity. After removing the sieve installation frame and the sieve to be tested from the detection cavity, replace them with another batch of sieve installation frames and sieves to be tested. Then manually rotate the rotating collection ring. When the communication cavity is communicated with another unused collection cavity, stop rotating the rotating collection ring. Perform the material screening operation again through the above process. In this way, multiple groups of sieves to be tested can be detected repeatedly, which can detect multiple groups of sieves at one time, reduce the cleaning times of the materials in the collection cavity, and is beneficial to improving the detection efficiency of multiple groups of sieves. At the same time, by using multiple independently separated collection cavities to collect materials, the situation where the two groups of test materials are mixed with each other and affect the detection accuracy can be avoided.

[0009] The present invention is further configured such that: the closed structure includes an air pump, an inflation chamber, and an air duct. The inflation chamber is arranged inside the flexible partition plate. The air pump is fixedly arranged on the detection main body. The air duct is opened in the detection main body and is communicated with the air pump. One end of the air duct away from the air pump is communicated with the inflation chamber.

[0010] By adopting the above technical solution, after the air pump is started, external gas is pressed into the inflation chamber through the air duct. At this time, since the thickness of the two side walls of the inflation chamber facing the axial direction of the detection main body is smaller than the thickness of the wall of the inflation chamber facing the radial direction of the detection main body, the two side walls of the inflation chamber facing the axial direction of the detection main body undergo expansion deformation and occupy the space of the communication chamber, so that the communication chamber is completely blocked, and the material cannot enter the collection chamber through the communication chamber, ensuring that the material will not be thrown into the collection chamber due to inertia during the process of the detection main body turning over, avoiding the generation of errors, and being beneficial to improving the detection accuracy.

[0011] The present invention is further configured such that: a second connecting member is arranged on the layer support block along the axial direction of the detection main body. The second connecting member penetrates through the layer support block and the screen respectively and extends to the bent end of the screen mounting frame. The second connecting member is inserted into the bent end of the screen mounting frame and is threadedly connected with the screen mounting frame. First connecting members are arranged at the four corners of the screen mounting frame. The end of the first connecting member penetrates through the screen mounting frame and is threadedly connected with the limiting block.

[0012] By adopting the above technical solution, the screen is fixed to the screen mounting frame through the second connecting member, and at the same time, the screen mounting frame is fixed to the limiting block through the first connecting member, so that the detection main body, the screen mounting frame, and the screen form a stable whole, avoiding abnormal shaking of the screen mounting frame and the screen when the detection main body turns over, affecting the progress of the detection process, and improving the stability during detection.

[0013] The present invention is further configured such that: an air pressure chamber is opened in the detection main body. The air pressure chamber is located on the side of the detection chamber opposite to the communication chamber. One end of the air pressure chamber facing the detection chamber is communicated with the detection chamber. An elastic membrane that closes the communication part is fixedly arranged at the communication part between the air pressure chamber and the detection chamber. An elastic layer is fixedly arranged on the inner wall of the detection chamber at the position of the communication chamber. The elastic layer can abut against the screen mounting frame. An air inlet channel is opened on the inner wall of the air pressure chamber. Elastic abutting pieces are fixedly arranged on the opposite end walls in the air inlet channel. The opposite elastic abutting pieces abut against each other and separate the air inlet channel from the air pressure chamber. The air inlet channel is communicated with the air duct at the end away from the air pressure chamber of the elastic abutting piece. An exhaust structure for intermittently discharging the gas in the air pressure chamber is arranged in the air pressure chamber.

[0014] The present invention is further configured as follows: The exhaust structure includes an exhaust passage, a fixing block, a return spring, a fixing rod, a movable rod, and a sealing plate. The exhaust passage is opened on the inner wall of the air pressure chamber. The exhaust passage penetrates the detection main body to connect the air pressure chamber with the outside of the detection main body. The fixing block is fixedly arranged at the connection of the exhaust passage and the air pressure chamber. The fixing rod is fixed on the side of the fixing block away from the air pressure chamber. The movable rod is inserted into the fixing rod from the end of the fixing rod away from the fixing block. The movable rod is slidably inserted into the fixing rod. The sealing plate is fixed at the end of the movable rod away from the fixing rod. The sealing plate is slidably abutted against the inner wall of the exhaust passage and the sealing plate seals and separates the exhaust passage from the outside of the detection main body. The return spring is arranged between the sealing plate and the fixing block. The two ends of the return spring are respectively fixedly connected to the sealing plate and the fixing block. The return spring provides an elastic force for the sealing plate towards the fixing block.

[0015] By adopting the above technical solution, when gas enters the air guide pipe, part of the gas is introduced into the air inlet passage through the air guide pipe. At this time, the air pressure on the side of the elastic abutting piece close to the air guide pipe in the air inlet passage is the same as the air pressure in the air guide pipe and the air inflation chamber, and both are greater than the air pressure in the air pressure chamber. When the pressure generated by the pressure difference between the air inlet passage and the air pressure chamber is greater than the deformation force of the elastic abutting piece, the elastic abutting piece undergoes elastic deformation. At this time, the abutting end of the elastic abutting piece is released from abutting, and the air inlet passage is communicated with the air pressure chamber, so that the gas in the air inlet passage enters the air pressure chamber to increase the air pressure in the air pressure chamber. At the same time, the elastic membrane generates a pressure on the screen mounting frame towards the communication chamber direction. At this time, the pressure of the screen mounting frame on the elastic layer increases, and the elastic layer undergoes elastic deformation. As the air pressure in the air pressure chamber further increases, the pressure of the screen mounting frame on the elastic layer further increases. When the pressure generated by the pressure difference between the air pressure in the air pressure chamber and the external atmospheric pressure of the detection main body is greater than the elastic force of the return spring, the sealing plate moves in the direction away from the air pressure chamber, and the return spring is stretched. When the sealing plate is moved out of the exhaust passage, the air pressure chamber is communicated with the external atmospheric environment. At this time, the gas in the air pressure chamber flows into the atmospheric environment, and the pressure of the elastic membrane on the screen mounting frame decreases. Then the sealing plate returns to the exhaust passage under the elastic force of the return spring, and the air pressure in the air pressure chamber increases again. Thus, the air pressure in the air pressure chamber increases and decreases reciprocally, so that the pressure of the elastic membrane on the screen mounting frame increases and decreases. Under the elastic action of the elastic layer, the screen mounting frame undergoes a small horizontal shaking, which can further screen and filter the materials accumulated on the screen, and is beneficial to improving the screening efficiency.

[0016] A detection method for a multi-layer screen damage detection device, the detection method includes:

[0017] S1: Stack a plurality of screens to be detected and place them in the screen mounting frame. When the plurality of screens are placed in the screen mounting frame, place layer support blocks between adjacent screens;

[0018] S2: Place the screen mounting frame into the opening of the detection cavity away from the base, making the screen mounting frame abut against the limit block, and the fixed block communicate with the communication space;

[0019] S3: Pour several objects of four different sizes into the screen mounting frame through the side of the detection cavity away from the base;

[0020] S4: Start the drive motor to rotate the drive motor back and forth in both directions, thereby driving the detection body to make a reciprocating flip at a fixed angle through the flip connecting plate. During the flipping process, the flipping angle of the detection body is always less than forty-five degrees;

[0021] S5: Release the sealing of the communication cavity by the sealing structure, and determine the damage condition of the screen by observing the materials in different connecting spaces.

[0022] The beneficial effects of the present invention are as follows: Pour several materials of four different sizes into the detection cavity through the opening of the detection cavity away from the base. At this time, the materials will gather on the screen inside the screen mounting frame and are sequentially filtered through multiple stacked screens. During the filtering process, the drive motor rotates back and forth in both directions, driving the detection body to make a rapid small-angle flip through the flip connecting plate, thereby promoting the efficiency of material filtering. The smallest materials pass through the screen near the base and fall on the bottom plate, and the remaining materials enter the through cavity and are introduced into the communication cavity after being screened by other screens. When there are large-volume materials and small-volume materials coexisting in the communication cavity, it means that the screen that can allow the small-volume materials to pass through is damaged. After removing the screen mounting frame from the detection cavity, remove the multiple screens from the screen mounting frame. At this time, find the damaged screen for replacement. There is no need to visually inspect the screen manually, and the detection efficiency is high and the accuracy is high. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the present invention;

[0024] Figure 2 is a structural sectional view of the present invention;

[0025] Figure 3 is Figure 3 an enlarged structural view of part A in

[0026] Figure 4 is Figure 3 a schematic structural diagram after the air pump inflates the guide pipe;

[0027] Figure 5 is an exploded structural diagram of the present invention.

[0028] In the figure: 10, base; 11, fixed seat; 12, drive motor; 13, detection main body; 14, flipping connecting plate; 15, detection cavity; 16, first connecting piece; 17, screen installation frame; 18, screen; 19, air pump; 20, rotating collection ring; 21, sealing baffle; 22, collection cavity; 23, rigid partition plate; 24, bottom plate; 25, through cavity; 26, elastic layer; 27, flexible partition plate; 28, inflation cavity; 29, air guide pipe; 30, air pressure cavity; 31, air inlet channel; 32, elastic abutting piece; 33, elastic membrane; 34, exhaust channel; 35, fixed block; 36, return spring; 37, fixed rod; 38, movable rod; 39, sealing plate; 40, layer support block; 41, second connecting piece; 42, communication cavity; 43, limit block; 44, cleaning channel. Detailed implementation manner

[0029] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below with reference to specific illustrations.

[0030] As Figures 1 to 2As shown in the figure, a multi-layer screen damage detection device includes a base 10, a fixed seat 11, a driving motor 12, a detection main body 13, a flipping connecting plate 14, a screen mounting frame 17, a screen 18, and a bottom plate 24. The base 10 is hollow cylindrical. There are two fixed seats 11 which are fixed at the opposite ends of the end face of the base 10. A cleaning channel 44 is radially opened at one end of the base 10 away from the fixed seat 11. The detection main body 13 is cylindrically arranged at the end of the base 10 where the fixed seat 11 is located. The flipping connecting plate 14 is fixed at both ends of the detection main body 13 facing the fixed seat 11. The flipping connecting plate 14 is rotatably connected to the fixed seat 11. The driving motor 12 is fixed at one end of the fixed seat 11 away from the flipping connecting plate 14. The driving motor 12 is power-connected to the rotating shaft of the flipping connecting plate 14. An inspection cavity 15 with a rectangular opening is opened on the end face of the detection main body 13 away from the base 10. The inspection cavity 15 penetrates the detection main body 13 along the axial direction of the detection main body 13. A limiting block 43 is fixedly arranged on the part of the inner side of the inspection cavity 15 facing the base 10. The screen mounting frame 17 is arranged in the inspection cavity 15 and is slidably arranged along the axial direction of the base 10. The screen mounting frame 17 abuts against the limiting block 43. The screen mounting frame 17 is rectangular frame-shaped and the end of the screen mounting frame 17 close to the base 10 bends and converges towards the inside of the screen mounting frame 17. There are several screens 18. The several screens 18 are stacked along the axial direction of the base 10 inside the rectangular frame of the screen mounting frame 17. The screen 18 closest to the base 10 abuts against the bent end of the screen mounting frame 17. Layer support blocks 40 are arranged at the corners of the adjacent screens 18. The bottom plate 24 is detachably fixed at the opening at one end of the inspection cavity 15 facing the base 10 and closes the opening of the inspection cavity 15. A through cavity 25 is radially opened on the inner wall of one side of the screen mounting frame 17 along the radial direction of the detection main body 13. There are several through cavities 25 opened along the axial direction of the detection main body 13. The number of through cavities 25 is the same as the number of screens 18 and the screens 18 are flush with the end walls of the through cavities 25 facing the base 10. A communication cavity 42 is radially opened on the detection main body 13. The communication cavity 42 communicates the inspection cavity 15 with the outside of the detection main body 13. Several flexible partition plates 27 arranged side by side along the axial direction of the detection main body 13 are fixedly arranged in the communication cavity 42. The several flexible partition plates 27 divide the communication cavity 42 into communication spaces with the same number as the number of screens 18 along the axial direction of the detection main body 13. The communication spaces are aligned with the through cavities 25. A closing structure for closing the communication cavity 42 is arranged in the communication cavity 42. The closing structure includes an air pump 19, an inflation cavity 28, and an air duct 29. The inflation cavity 28 is arranged inside the flexible partition plate 27. The air pump 19 is fixedly arranged on the detection main body 13. The air duct 29 is opened inside the detection main body 13. The air duct 29 communicates with the air pump 19. The end of the air duct 29 away from the air pump 19 communicates with the inflation cavity 28.

[0031] As Figure 1 and Figure 2As shown, a rotating collection ring 20 is sleeved outside the detection main body 13. The rotating collection ring 20 is rotatably connected to the detection main body 13. A plurality of collection cavities 22 are formed on the outer curved surface of the rotating collection ring 20. The plurality of collection cavities 22 are arranged in an equiangular circular array with the axis of the detection main body 13 as the axis. The plurality of collection cavities 22 can be respectively communicated with the communication cavities 42. A communication port is formed in the collection cavity 22 in a direction away from the detection main body 13 along the radial direction of the detection main body 13. A sealing baffle 21 is detachably and fixedly arranged at the communication port. A plurality of rigid partition plates 23 are fixedly arranged in parallel along the axial direction of the detection main body 13 in the collection cavity 22. The number of the rigid partition plates 23 is the same as the number of the flexible partition plates 27. The rigid partition plates 23 can be aligned and abutted against the flexible partition plates 27. The plurality of rigid partition plates 23 divide the collection cavity 22 into a plurality of collection spaces with the same number as the communication spaces along the axial direction of the detection main body 13.

[0032] As Figure 2 and Figure 5 As shown, a second connecting member 41 is arranged on the layer support block 40 along the axial direction of the detection main body 13. The second connecting member 41 penetrates through the layer support block 40 and the screen 18 respectively and extends to the bent end of the screen installation frame 17. The second connecting member 41 is inserted into the bent end of the screen installation frame 17 and is threadedly connected to the screen installation frame 17. First connecting members 16 are arranged at the four corners of the screen installation frame 17. The ends of the first connecting members 16 penetrate through the screen installation frame 17 and are threadedly connected to the limiting blocks 43. The screen 18 is fixed to the screen installation frame 17 through the second connecting member 41. At the same time, the screen installation frame 17 is fixed to the limiting blocks 43 through the first connecting members 16, so that the detection main body 13, the screen installation frame 17 and the screen 18 form a stable whole, avoiding abnormal vibration of the screen installation frame 17 and the screen 18 when the detection main body 13 is turned over, affecting the detection process, and improving the stability during detection.

[0033] As Figures 2 to 4As shown, an air pressure chamber 30 is provided inside the detection body 13. The air pressure chamber 30 is located on the side of the detection chamber 15 opposite to the communication chamber 42. One end of the air pressure chamber 30 facing the detection chamber 15 is communicated with the detection chamber 15. A shaking structure is arranged inside the air pressure chamber 30. The shaking structure includes an elastic membrane 33 that closes the communication between the air pressure chamber 30 and the detection chamber 15. The elastic membrane 33 is fixed to the air pressure chamber 30. An elastic layer 26 is fixedly arranged on the inner wall of the detection chamber 15 at the position of the communication chamber 42. The elastic layer 26 can abut against the screen mounting frame 17. An air inlet channel 31 is opened on the inner wall of the air pressure chamber 30. Elastic abutting pieces 32 are fixedly arranged on the opposite end walls inside the air inlet channel 31. The opposite elastic abutting pieces 32 abut against each other and separate the air inlet channel 31 from the air pressure chamber 30. One end of the air inlet channel 31 away from the air pressure chamber 30 where the elastic abutting piece 32 is located is communicated with the air guide pipe 29. An exhaust structure for intermittently discharging the gas inside the air pressure chamber 30 is arranged inside the air pressure chamber 30. The exhaust structure includes an exhaust channel 34, a fixed block 35, a return spring 36, a fixed rod 37, a movable rod 38, and a sealing plate 39. The exhaust channel 34 is opened on the inner wall of the air pressure chamber 30. The exhaust channel 34 penetrates the detection body 13 to communicate the air pressure chamber 30 with the outside of the detection body 13. The fixed block 35 is fixedly arranged at the communication position of the exhaust channel 34 and the air pressure chamber 30. The fixed rod 37 is fixed to the side of the fixed block 35 away from the air pressure chamber 30. The movable rod 38 is inserted into the fixed rod 37 from one end of the fixed rod 37 away from the fixed block 35. The movable rod 38 is slidably inserted into the fixed rod 37. The sealing plate 39 is fixed to the end of the movable rod 38 away from the fixed rod 37. The sealing plate 39 is slidably abutted against the inner wall of the exhaust channel 34 and the sealing plate 39 seals and separates the exhaust channel 34 from the outside of the detection body 13. The return spring 36 is arranged between the sealing plate 39 and the fixed block 35. The two ends of the return spring 36 are respectively fixedly connected to the sealing plate 39 and the fixed block 35. The return spring 36 provides an elastic force for the sealing plate 39 towards the fixed block 35. The exhaust structure can also be replaced by a pressure valve. When the detection device is large in size and used to detect a large-area screen 18, a pressure valve can be used. When the detection device is small in size, the influence of the weight of the pressure valve on the stability during the flipping of the detection body 13 needs to be considered. Therefore, the exhaust structure is used instead. At the same time, when the detection device is small in size, the traditional vibrator that causes the screen mounting frame 17 to vibrate at a high frequency will affect the stability during the flipping of the detection body 13 and affect the overall stability of the detection device. Therefore, it cannot be used. At this time, by using the shaking structure, using the air pressure and the elastic force of the elastic layer 26, the shaking of the screen mounting frame 17 can be generated to minimize the influence on the flipping of the detection body 13. While ensuring the stability of the detection device, the purpose of promoting the screening and filtering of materials by making the screen mounting frame 17 shake is achieved.

[0034] One screen mounting frame 17, several stacked screens 18, and a layer support block 40 form a set of detection units, and the detection device needs to detect multiple sets of detection units.

[0035] Pour several materials of four different sizes into the detection chamber 15 through the opening away from the base 10 of the detection chamber 15. At this time, the materials will gather on the screen 18 inside the screen installation frame 17 and are sequentially filtered through the stacked multiple screens 18. During the filtering process, the driving motor 12 reciprocates forward and backward, driving the detection body 13 to make a rapid small-angle flip through the flip connecting plate 14, thereby promoting the efficiency of material filtering. The smallest materials pass through the screen 18 close to the base 10 and fall on the bottom plate 24. The remaining materials enter the through cavity 25 after being screened by other screens 18 and are introduced into the communication cavity 42. When there are large-volume materials and small-volume materials coexisting in the communication cavity 42, it indicates that the screen 18 that can allow the small-volume materials to pass through is damaged. After removing the screen installation frame 17 from the detection chamber 15, remove the multiple screens 18 from the screen installation frame 17. At this time, find the damaged screen 18 and replace it. There is no need to visually inspect the screen 18 manually, and the detection efficiency is high and the accuracy is high.

[0036] The materials screened and flowing into the communication cavity 42 flow into the collection cavity 22. At this time, the hard partition plate 23 separates the screened materials to prevent them from being mixed again. After the screening is completed, the materials in the collection cavity 22 can be observed by removing the sealing baffle 21. At this time, there is no need to clean the materials in the collection cavity 22. After removing the screen installation frame 17 and the screen to be tested 18 from the detection chamber 15, replace them with another batch of screen installation frames 17 and screens to be tested 18. Then manually rotate the rotating collection ring 20. When the communication cavity 42 is connected to another unused collection cavity 22, stop rotating the rotating collection ring 20. Through the above process, perform the material screening operation again. In this way, multiple groups of screens to be tested 18 can be detected repeatedly, which can detect multiple groups of screens 18 at one time, reduce the cleaning times of the materials in the collection cavity 22, and is beneficial to improving the detection efficiency of multiple groups of screens 18. At the same time, by using multiple independently separated collection cavities 22 for material collection, the situation where the two groups of test materials are doped with each other and affect the detection accuracy can be avoided.

[0037] After the air pump 19 is started, external gas is pressed into the inflation cavity 28 through the air duct 29. At this time, since the thickness of the two side walls of the inflation cavity 28 facing the axial direction of the detection body 13 is smaller than the thickness of the wall of the inflation cavity 28 facing the radial direction of the detection body 13, the two side walls of the inflation cavity 28 facing the axial direction of the detection body 13 expand and deform and occupy the space of the communication cavity 42, as shown in the inflation cavity 28 in Figure 4 , so that the communication cavity 42 is completely blocked, and the materials cannot enter the collection cavity 22 through the communication cavity 42, ensuring that the materials will not be thrown into the collection cavity 22 due to inertia during the flipping process of the detection body 13, avoiding the generation of errors and being beneficial to improving the detection accuracy.

[0038] When the gas enters the air guide tube 29, part of the gas is introduced into the air intake channel 31 through the air guide tube 29. At this time, the air pressure on the side of the air intake channel 31 located at the elastic abutment piece 32 close to the air guide tube 29 is the same as the air pressure in the air guide tube 29 and the inflation chamber 28, and both are greater than the air pressure in the air pressure chamber 30. When the pressure generated by the pressure difference between the air intake channel 31 and the air pressure chamber 30 is greater than the deformation force of the elastic abutment piece 32, the elastic abutment piece 32 undergoes elastic deformation. At this time, the abutment end of the elastic abutment piece 32 is released from abutment, and the air intake channel 31 is connected with the air pressure chamber 30, so that the gas in the air intake channel 31 enters the air pressure chamber 30, increasing the air pressure in the air pressure chamber 30, and at the same time, the elastic membrane 33 generates a pressure on the screen mounting frame 17 in the direction of the connecting chamber 42. At this time, the pressure of the screen mounting frame 17 on the elastic layer 26 increases, and the elastic layer 26 undergoes elastic deformation. As the air pressure in the air pressure chamber 30 further increases, the pressure of the screen mounting frame 17 on the elastic layer 26 further increases. When the sealing plate 39 is moved out of the exhaust passage 34, the air in the air pressure chamber 30 is connected with the external atmospheric environment of the detection body 13. At this time, the gas in the air pressure chamber 30 flows into the atmospheric environment, and the pressure of the elastic membrane 33 on the screen mounting frame 17 is reduced. Then, the sealing plate 39 returns to the exhaust passage 34 under the elastic force of the reset spring 36, and the air pressure in the air pressure chamber 30 increases again. The air pressure in the air pressure chamber 30 is increased and decreased reciprocally, so that the pressure of the elastic membrane 33 on the screen mounting frame 17 can be increased and decreased. Under the elastic action of the elastic layer 26, the screen mounting frame 17 undergoes a small horizontal shaking, which can further enable the materials accumulated on the screen 18 to be screened and filtered, which is beneficial to improving the screening efficiency.

[0039] When a screen 18 closest to the base 10 is damaged, the smallest group of materials will leak onto the bottom plate 24. At this time, there will be no or only a small amount of the smallest group of materials in the collection space. When the detection equipment is used up, start the drive motor 12 to flip the detection body 13 180 degrees. At this time, under the action of gravity, the materials on the bottom plate 24 will fall into the inside of the base 10, and then the fallen materials can be taken out through the cleaning channel 44.

[0040] A detection method for a multi-layer screen damage detection device, the detection method comprising:

[0041] S1: stacking a plurality of screens 18 to be tested and placing them in a screen installation frame 17, and placing a layer support block 40 between adjacent screens 18 when the plurality of screens 18 are placed in the screen installation frame 17;

[0042] S2: Insert the screen mounting frame 17 through the opening of the detection chamber 15 away from the base 10, making the screen mounting frame 17 abut against the limit block 43, and the fixed block 35 communicate with the communication space;

[0043] S3: Pour several objects of four different sizes into the screen mounting frame 17 through the side of the detection chamber 15 away from the base 10. None of the four materials can pass through the screen 18 closest to the base 10;

[0044] S4: Start the drive motor 12 to make the drive motor 12 rotate back and forth, thereby driving the detection body 13 to perform reciprocating flips at a fixed angle through the flipping connecting plate 14. During the flipping process, the flipping angle of the detection body 13 is always less than forty-five degrees;

[0045] S5: Release the sealing of the communication chamber 42 by the sealing structure. The material enters the collection space through the connection space. After removing the sealing baffle 21, observe the material to determine the damage condition of the screen 18. When materials of different sizes are in the same collection space, it proves that the screen 18 where small materials can pass through and large materials cannot pass through is damaged;

[0046] S6: After the detection is completed, remove the set of screen mounting frame 17 and screen 18, rotate the rotating collection ring 20 to make the unused collection chamber 22 communicate with the communication chamber 42;

[0047] S7: Replace with a new undetected screen mounting frame 17 and screen 18 and place them in the detection chamber 15, and repeat the steps of S1 to S6;

[0048] S8: After there is material in all the collection chambers 22, uniformly remove the sealing baffle 21 and clean the material in the collection chambers 22, and then perform the process of steps S1 to S7.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-layer screen damage detection device, characterized in that: It includes a base (10), a fixed seat (11), a driving motor (12), a detection body (13), a flipping connecting plate (14), a screen mounting frame (17), a screen (18) and a bottom plate (24). The base (10) is arranged in a hollow cylindrical shape. The fixed seat (11) is relatively fixedly arranged at the end of the base (10). The detection body (13) is arranged inside the base (10). The flipping connecting plate (14) is fixed at the opposite end of the detection body (13). The flipping connecting plate (14) is rotatably connected to the fixed seat (11). The driving motor (12) is fixed on the fixed seat (11) and is power-connected to the rotating shaft of the flipping connecting plate (14). A detection cavity (15) penetrating the detection body (13) is formed on the detection body (13). A limiting block (43) is fixedly arranged on the inner wall of the detection cavity (15). The screen mounting frame (17) is arranged inside the detection cavity (15) and abuts against the limiting block (43). One end of the screen mounting frame (17) close to the base (10) is bent towards the inside of the screen mounting frame (17). The screens (18) are stacked at intervals inside the screen mounting frame (17). The bottom plate (24) is detachably fixed at the opening at one end of the detection cavity (15) facing the base (10). A through cavity (25) is formed in the inner wall of one side of the screen mounting frame (17) along the radial direction of the detection body (13). The number and positions of the through cavities (25) correspond to those of the screens (18). A communication cavity (42) is formed in the detection body (13) along the radial direction. The communication cavity (42) communicates the detection cavity (15) with the outside of the detection body (13). A flexible partition plate (27) is fixedly arranged in the communication cavity (42). The flexible partition plate (27) divides the communication cavity (42) along the axial direction of the detection body (13) into communication spaces with the same number as the number of the screens (18). The communication spaces are aligned with the through cavities (25). A closing structure for closing the communication cavity (42) is arranged in the communication cavity (42). A rotating collection ring (20) is sleeved outside the detection body (13). The rotating collection ring (20) is rotatably connected to the detection body (13). A plurality of collection cavities (22) are formed on the outer curved surface of the rotating collection ring (20). The plurality of collection cavities (22) are arranged in an equiangular circular array with the axis of the detection body (13) as the axis. The plurality of collection cavities (22) can be respectively communicated with the communication cavities (42). A communication port is formed in the collection cavity (22) along the radial direction of the detection body (13) towards the direction away from the detection body (13). A sealing baffle (21) is detachably and fixedly arranged at the communication port. A plurality of hard partition plates (23) are fixedly arranged in parallel along the axial direction of the detection body (13) in the collection cavity (22). The number of the hard partition plates (23) is the same as that of the flexible partition plates (27). The hard partition plates (23) can be aligned with and abut against the flexible partition plates (27). The plurality of hard partition plates (23) divide the collection cavity (22) into a plurality of collection spaces with the same number as the number of the communication spaces along the axial direction of the detection body (13).

2. The multi-layer screen damage detection device according to claim 1, characterized in that: The closed structure includes an air pump (19), an inflation chamber (28), and an air duct (29). The inflation chamber (28) is arranged inside a flexible partition plate (27). The air pump (19) is fixedly arranged on the detection main body (13). The air duct (29) is opened inside the detection main body (13). The air duct (29) communicates with the air pump (19), and one end of the air duct (29) away from the air pump (19) communicates with the inflation chamber (28).

3. The multi-layer screen damage detection device according to claim 1, characterized in that: A second connecting member (41) is arranged on the layer support block (40) along the axial direction of the detection main body (13). The second connecting member (41) penetrates through the layer support block (40) and the screen (18) respectively and extends to the bent end of the screen mounting frame (17). The second connecting member (41) is inserted into the bent end of the screen mounting frame (17) and is threadedly connected with the screen mounting frame (17). First connecting members (16) are arranged at the four corners of the screen mounting frame (17). The end portions of the first connecting members (16) penetrate through the screen mounting frame (17) and are threadedly connected with the limiting blocks (43).

4. The multi-layer screen damage detection device according to claim 2, characterized in that: An air pressure chamber (30) is opened inside the detection main body (13). The air pressure chamber (30) is located on the side of the detection chamber (15) opposite to the communication chamber (42). One end of the air pressure chamber (30) facing the detection chamber (15) communicates with the detection chamber (15). An elastic membrane (33) that closes the communication part is fixedly arranged at the communication part between the air pressure chamber (30) and the detection chamber (15). An elastic layer (26) is fixedly arranged on the inner wall of the detection chamber (15) at the communication chamber (42). The elastic layer (26) can abut against the screen mounting frame (17). An air inlet channel (31) is opened on the inner wall of the air pressure chamber (30). Elastic abutting pieces (32) are fixedly arranged on the opposite end walls inside the air inlet channel (31). The opposite elastic abutting pieces (32) abut against each other and separate the air inlet channel (31) from the air pressure chamber (30). One end of the air inlet channel (31) away from the air pressure chamber (30) and located at the elastic abutting piece (32) communicates with the air duct (29). An exhaust structure for intermittently discharging the gas inside the air pressure chamber (30) is arranged inside the air pressure chamber (30).

5. The multi-layer screen damage detection device according to claim 4, characterized in that: The exhaust structure includes an exhaust passage (34), a fixing block (35), a return spring (36), a fixing rod (37), a movable rod (38) and a sealing plate (39). The exhaust passage (34) is opened on the inner wall of the air pressure chamber (30). The exhaust passage (34) penetrates through the detection main body (13) to communicate the air pressure chamber (30) with the outside of the detection main body (13). The fixing block (35) is fixedly arranged at the connection between the exhaust passage (34) and the air pressure chamber (30). The fixing rod (37) is fixed on the side of the fixing block (35) away from the air pressure chamber (30). The movable rod (38) is inserted into the fixing rod (37) from one end of the fixing rod (37) away from the fixing block (35). The movable rod (38) is slidably inserted into the fixing rod (37). The sealing plate (39) is fixed at one end of the movable rod (38) away from the fixing rod (37). The sealing plate (39) is slidably abutted against the inner wall of the exhaust passage (34), and the sealing plate (39) seals and separates the exhaust passage (34) from the outside of the detection main body (13). The return spring (36) is arranged between the sealing plate (39) and the fixing block (35). The two ends of the return spring (36) are respectively fixedly connected to the sealing plate (39) and the fixing block (35). The return spring (36) provides an elastic force for the sealing plate (39) towards the fixing block (35).

6. The detection method of a multi-layer screen damage detection device according to any one of claims 1-5, characterized in that: The detection method includes: S1: Stack a plurality of sieves (18) to be detected and place them into the sieve installation frame (17). When the plurality of sieves (18) are placed into the sieve installation frame (17), place layer support blocks (40) between adjacent sieves (18). S2: Place the sieve installation frame (17) into the detection chamber (15) from the opening away from the base (10), so that the sieve installation frame (17) abuts against the limit block (43), and the fixing block (35) communicates with the communication space. S3: Pour a plurality of four objects of different sizes into the sieve installation frame (17) through the side of the detection chamber (15) away from the base (10). S4: Start the drive motor (12) to make the drive motor (12) rotate back and forth, so as to drive the detection main body (13) to perform a reciprocating flip at a fixed angle through the flip connecting plate (14). During the flipping process, the flipping angle of the detection main body (13) is always less than forty-five degrees. S5: Determine the damage condition of the sieve (18) by observing the materials in different connection spaces.

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