Coating processing sieving device

Abstract

The present application relates to the technical field of coating screening, in particular to a coating processing screening device, which comprises a shell with open upper and lower ends, the bottom of the shell is provided with left-right symmetrical guide plates, there is a gap between the two guide plates, the inside of the shell is provided with replaceable screens, and the device further comprises a detection mechanism for detecting whether the screen has a broken part and a pushing mechanism for pushing the filler particle coating on the screen flat; the present application avoids the problem of uneven particle size of the filler particle coating caused by the fact that the broken screen cannot be found in time when there is only one screen, and the filler particle coating is not screened, by arranging two layers of screens, and the filler particle coating is pushed flat by the reverse reciprocating movement of the flexible push plate driven by the two horizontal moving rods, so that the screening of the filler particle coating is accelerated; the present application can replace the broken screen in time by regularly detecting whether the screen has a broken part through the detection mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of paint screening, in particular to a paint processing screening device. BACKGROUND

[0002] Filler particle paint is a category of paint that adds granular fillers to the paint, which can have different shapes, sizes and materials to achieve specific functions and effects, and is widely used in the coating and decoration of object surfaces in fields such as construction, industry and aerospace.

[0003] Filler particle paint needs to be screened in the last step before packaging, and intermittent sampling is required during production to check the particle size and particle size distribution of the product, so that problems can be found and timely measures can be taken to ensure high product quality. However, during the actual screening process, the screen mesh may be damaged, causing some filler particle paint to be discharged without screening, which leads to differences in the particle size of the filler particle paint, affecting the final product quality. Moreover, since the screening is in a relatively closed space, the workers cannot timely discover the damage of the screen mesh, which makes the particle size difference of the filler particle paint larger. SUMMARY

[0004] The present application provides a paint processing screening device to solve the problem that the screen mesh is damaged and cannot be replaced in time, resulting in differences in the particle size of the filler particle paint.

[0005] The present application provides a paint processing screening device, which comprises a shell with open upper and lower ends, a left-right symmetrical material guide plate is arranged at the bottom of the shell, the upper surface of the material guide plate is inclined, and there is a gap between the two material guide plates, a replaceable screen mesh is arranged inside the shell, a rightward extending rectangular through slot is formed in the left side wall of the shell, the rectangular through slot penetrates the front and rear side walls of the shell, but does not completely penetrate the right side wall of the shell, two rectangular through slots are formed above and below, U-shaped brackets are fixedly installed on the left and right side walls of the shell and located at the front and rear ends of the rectangular through slot, the upper surface of the U-shaped bracket is lower than the lower surface of the rectangular through slot, a winding roller is arranged between the front and rear U-shaped brackets, a H-shaped wheel is fixedly installed at both ends of the winding roller and clamped in the U-shaped bracket, and both ends of the screen mesh are fixed on the two winding rollers.

[0006] The screening device comprises a detection mechanism, the detection mechanism comprises a connecting plate arranged at the back of the shell and a rectangular frame connected at the left and right ends of the connecting plate, a push rod is elastically and slidably connected to the front end of the rectangular frame, the push rod penetrates through the rear side wall of the shell and extends to the inside of the shell, the ends of the two push rods are jointly provided with a mounting plate, the bottom of the mounting plate is provided with two rows of detection portions distributed in front and back, and the two rows of detection portions are staggered in the left and right directions, the detection portion comprises a spring connected to the bottom of the mounting plate and a detection ball fixedly connected to the bottom of the spring, and the detection ball abuts against the upper surface of the screen under the elastic force of the spring.

[0007] The bottom of the connecting plate is also provided with an L-shaped rod, the L-shaped rod penetrates through the rear side wall of the shell and is connected with a push wedge, the upper surface of the push wedge abuts against the lower surface of the screen, the rear side wall of the shell is provided with a receiving groove corresponding to the position of the push wedge, in the initial state, the push wedge is located in the receiving groove, and the mounting plate is in contact with the rear side wall of the shell.

[0008] The screening device further comprises a pushing mechanism for pushing the filler particles on the screen flat.

[0009] In a possible implementation, two T-shaped grooves extending to the left are formed in the right side wall of the shell from top to bottom, the T-shaped grooves are located above the corresponding rectangular through grooves and are in communication with the rectangular through grooves, an edge pressing mechanism for pressing the front and back edges of the screen is arranged between the two T-shaped grooves opposite to each other, the edge pressing mechanism comprises a gas cylinder fixed to the right side wall of the shell and a strip-shaped plate fixedly connected to the output end of the gas cylinder, and one edge pressing assembly extending into the T-shaped groove and used for pressing the screen is arranged at each of the front and back ends of the strip-shaped plate.

[0010] In a possible implementation, a communication groove extending downward is formed in the top of the left side wall of the shell, the communication groove is in communication with the two rectangular through grooves, and a lifting plate is slidably arranged in the communication groove, the top of the lifting plate is integrally formed with a limiting block, and the side wall of the lifting plate is provided with two relief grooves distributed in up and down directions and having the same width as the screen.

[0011] In a possible implementation, the pushing mechanism comprises a back-shaped seat fixed to the top end of the rear side wall of the shell, the back-shaped seat and the rear side wall of the shell are slidably provided with transverse rods, the opposite surfaces of the two transverse rods are provided with strip-shaped grooves, and the strip-shaped grooves are uniformly provided with teeth, the rear side wall of the shell and between the two transverse rods is further provided with a driving assembly for driving the two transverse rods to slide in opposite directions, the transverse rods are vertically provided with lifting rods, the bottom of the lifting rod is fixedly connected with a flexible push plate, and the flexible push plate is in contact with the upper surface of the screen.

[0012] In a possible implementation manner, the right inner wall of the shell is provided with two guide grooves arranged in an up-down manner, the guide grooves are located above the corresponding rectangular through grooves, and the guide grooves are composed of a horizontal section, an inclined section and an arc section, wherein the bottom end of the inclined section is in communication with the middle part of the horizontal section, and the two ends of the arc section are in communication with the top end of the inclined section and the rear end of the horizontal section; the side wall of the lifting rod is fixedly connected with a connecting rod, and the tail end of the connecting rod is rotatably provided with a rotating wheel sliding along the track of the guide groove; and the rear end bottom of the horizontal section is elastically and slidably provided with a reverse stopping block for limiting the moving direction of the rotating wheel.

[0013] In a possible implementation manner, the edge pressing assembly comprises a fixed rod vertically fixed at the end of the strip-shaped plate, and the edge pressing assembly further comprises a plurality of wedge-shaped blocks slidably arranged in the T-shaped groove, and adjacent two wedge-shaped blocks are fixedly connected through connecting rods, wherein the wedge-shaped block located at the rightmost side is fixedly connected with the fixed rod; the inside of the T-shaped groove is further slidably provided with a pressing plate with a magnetic layer on the upper surface; the top wall of the T-shaped groove is an iron layer matched with the magnetic layer; the upper surface of the pressing plate is fixedly connected with a plurality of linearly arranged protrusions, and the top of the protrusion is matched with the inclined surface of the wedge-shaped block.

[0014] In a possible implementation manner, the driving group comprises two driving gears meshing with the teeth of the upper and lower horizontal moving rods and a linkage gear meshing with the two driving gears; and the driving group further comprises a T-shaped plate fixed at the rear sidewall of the shell, and the two driving gears and the linkage gear are rotatably installed on the T-shaped plate.

[0015] The above one or more technical solutions in the embodiment of the present application have at least one of the following technical effects: by arranging the upper and lower two layers of screen meshes, the problem that, when there is only one layer of screen mesh, the broken screen mesh cannot be found in time, resulting in that part of the filler particle coating is not sieved, and finally the filler particle coating has different particle sizes, is avoided; the upper and lower two horizontal moving rods drive the flexible push plate to move back and forth in the opposite direction, so that the filler particle coating is flattened, and the sieving of the filler particle coating is accelerated.

[0016] The guiding groove plays a guiding role on the running track of the lifting rod and the flexible push plate at the bottom of the lifting rod, so that the flexible push plate can quickly drop and hit the screen mesh during reciprocating movement, and the filler particle coating pushed to the edge by the flexible push plate and not sieved in time is pulled together in the middle after being vibrated, and waits to be flattened again next time.

[0017] The detection mechanism detects whether the screen mesh is broken regularly, so that the broken screen mesh can be replaced in time, and the increase of the filler particle coating not sieved due to the long time of the broken screen mesh of the double-layer screen mesh is avoided.

[0018] The edge pressing mechanism presses and fixes the edge of the screen, avoids too large deformation of the screen when the flexible push plate is pressed down, and blocks the rectangular through slot, so that the shell forms a relatively closed screening environment. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a perspective view of the present application.

[0020] Figure 2 is one of the partial sectional views of the present application.

[0021] Figure 3 is a partial sectional view of the shell of the present application.

[0022] Figure 4 is the second partial sectional view of the present application.

[0023] Figure 5 is a structural schematic view of the edge pressing assembly in the present application.

[0024] Figure 6 is an exploded view of the shell and the lifting plate of the present application.

[0025] Figure 7 is the third partial sectional view of the present application.

[0026] Figure 8 is a sectional plan view of the present application.

[0027] Figure 9 is a perspective view of the detection mechanism of the present application.

[0028] Figure 10 is Figure 8 is an enlarged schematic view of the A area in the figure.

[0029] In the figure: 1, shell; 11, rectangular through slot; 12, T-shaped slot; 13, communication groove; 14, lifting plate; 141, accommodation groove; 15, guide groove; 151, check block; 16, accommodation groove; 2, material guide plate; 3, U-shaped frame; 4, I-shaped wheel; 5, screen; 6, material pushing mechanism; 61, back-shaped seat; 62, transverse moving rod; 63, tooth; 64, driving gear; 65, lifting rod; 66, flexible push plate; 67, connecting rod; 7, detection mechanism; 71, connecting plate; 72, rectangular frame; 73, push rod; 74, mounting plate; 75, detection part; 76, L-shaped rod; 77, push wedge; 8, edge pressing mechanism; 81, air cylinder; 82, strip plate; 83, edge pressing assembly; 831, fixed rod; 832, wedge block; 833, connecting rod; 834, pressing plate; 835, protrusion. DETAILED DESCRIPTION

[0030] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0031] Please refer to Figure 1 and Figure 2 , a coating processing screening device, comprising a housing 1 with open upper and lower ends, the bottom of the housing 1 is provided with left and right symmetrical guide plates 2, the upper surface of the guide plate 2 is inclined, and there is a gap between the two guide plates 2, forming a filler particle coating discharge port, the filler particle coating after screening slides down along the upper surface of the guide plate 2 and finally discharges from the discharge port.

[0032] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 6 , the left side wall of the housing 1 is provided with a rightward extending rectangular through slot 11, the rectangular through slot 11 penetrates the front and rear side walls of the housing 1, but does not completely penetrate the right side wall of the housing 1, two rectangular through slots 11 are provided on the upper and lower sides, and U-shaped brackets 3 are fixedly installed on the left and right side walls of the housing 1 and located at the front and rear ends of the rectangular through slot 11, the upper surface of the U-shaped bracket 3 is lower than the lower surface of the rectangular through slot 11, a winding roller is arranged between the front and rear two U-shaped brackets 3, the two ends of the winding roller are fixedly installed with a I-shaped wheel 4 clamped in the U-shaped bracket 3, and the friction between the U-shaped bracket 3 and the I-shaped wheel 4 makes the winding roller remain in a stationary state without being subjected to sufficient torsional force, wherein the winding roller located on the left side is a winding roller, and the winding roller located on the right side is a unwinding roller, the unwinding roller is wound with a screen 5, the screen 5 passes through the rectangular through slot 11 of the right side wall of the housing 1 and then passes out from the rectangular through slot 11 of the left side wall of the housing 1 and is fixed on the winding roller.

[0033] By arranging two layers of screens 5, it is avoided that when there is only one layer of screen 5 and it is broken, the filler particle coating is discharged without screening, ensuring the uniformity of the particle size of the filler particle coating.

[0034] Please refer to Figure 1 , Figure 4 and Figure 5The right side wall of the shell 1 is provided with two T-shaped grooves 12 extending leftward at the front and rear ends from top to bottom, the T-shaped grooves 12 are located above the corresponding rectangular through grooves 11 and are communicated with the rectangular through grooves 11, the edge pressing mechanism 8 for pressing the front and rear side edges of the screen 5 is arranged between the two T-shaped grooves 12 opposite to each other, the edge pressing mechanism 8 comprises a pneumatic cylinder 81 fixed to the right side wall of the shell 1 and a strip-shaped plate 82 fixedly connected to the output end of the pneumatic cylinder 81, the strip-shaped plate 82 is provided with an edge pressing assembly 83 extending into the T-shaped groove 12 at each of the front and rear ends, the edge pressing assembly 83 comprises a fixed rod 831 fixedly arranged at the end of the strip-shaped plate 82, the edge pressing assembly 83 further comprises a plurality of wedge-shaped blocks 832 slidably arranged in the T-shaped groove 12, and the adjacent two wedge-shaped blocks 832 are fixedly connected through a connecting rod 833, wherein the wedge-shaped block 832 located at the most right side is fixedly connected with the fixed rod 831, the inside of the T-shaped groove 12 is further slidably provided with a pressing plate 834 with a magnetic layer on the upper surface, the top wall of the T-shaped groove 12 is an iron layer matched with the magnetic layer, the pressing plate 834 is fixedly connected with a plurality of linearly arranged protrusions 835 on the upper surface, and the top of the protrusion 835 and the inclined surface of the wedge-shaped block 832 are matched, when the pneumatic cylinder 81 drives the fixed rod 831 to move into the T-shaped groove 12 through the strip-shaped plate 82, the inclined surface of the wedge-shaped block 832 pushes the protrusion 835 downward, and then pushes the pressing plate 834 to enter the rectangular through groove 11 from below the T-shaped groove 12, until the lower surface of the pressing plate 834 presses the edge of the screen 5.

[0035] Please refer to Figure 3 and Figure 6 The top of the left side wall of the shell 1 is provided with a communication groove 13 extending downward, the communication groove 13 is communicated with the two rectangular through grooves 11, the communication groove 13 is slidably provided with a lifting plate 14, the top of the lifting plate 14 is integrally formed with a limiting block, the side wall of the lifting plate 14 is provided with two accommodating grooves 141 distributed above and below and having the same width as the screen 5, when the lifting plate 14 is lifted by a height, the accommodating grooves 141 correspond to the rectangular through grooves 11, the screen 5 penetrates the accommodating grooves 141 and the rectangular through grooves 11, when the lifting plate 14 is lowered by a height, the limiting block contacts the top of the shell 1, the accommodating grooves 141 are staggered with the rectangular through grooves 11, the lifting plate 14 blocks the rectangular through grooves 11, and the left end of the screen 5 is pressed.

[0036] Please refer to Figure 1 , Figure 2 and Figure 7, in order to accelerate the speed of the filler particle coating through the screen 5, the application also provides a pushing mechanism 6, which comprises a back-shaped seat 61 fixed at the top end of the rear side wall of the shell 1, the back-shaped seat 61 and the rear side wall of the shell 1 are both slidably provided with a horizontal moving rod 62, the opposite surfaces of the upper and lower horizontal moving rods 62 are both provided with a strip-shaped slot, and the strip-shaped slot is uniformly distributed with teeth 63, the rear side wall of the shell 1 and between the two horizontal moving rods 62 is further provided with a driving group for driving the two horizontal moving rods 62 to slide in opposite directions, the driving group comprises two driving gears 64 engaged with the teeth 63 in the upper and lower horizontal moving rods 62 and a linkage gear engaged with the two driving gears 64, the driving group further comprises a T-shaped plate fixed on the rear side wall of the shell 1, and the two driving gears 64 and the linkage gear are all rotatably installed on the T-shaped plate; a lifting rod 65 is vertically arranged on the horizontal moving rod 62, and the bottom of the lifting rod 65 is fixedly connected with a flexible push plate 66, the flexible push plate 66 is in contact with the upper surface of the screen 5, when the two horizontal moving rods 62 slide in opposite directions, the corresponding flexible push plate 66 is moved by the lifting rod 65, and the flexible push plate 66 pushes the filler particle coating accumulated on the screen 5 flat during the movement process, thereby accelerating the screening of the filler particle coating.

[0037] Please refer to Figure 2 、 Figure 8 and Figure 10 , the right inner wall of the shell 1 is provided with two guide grooves 15 distributed in an up-down manner, the guide grooves 15 are located above the corresponding rectangular through groove 11, and the guide grooves 15 are composed of a horizontal section, an inclined section and an arc section, wherein the bottom end of the inclined section is communicated with the middle part of the horizontal section, and the two ends of the arc section are communicated with the top end of the inclined section and the rear end of the horizontal section, the side wall of the lifting rod 65 is fixedly connected with a connecting rod 67, and the end of the connecting rod 67 is rotatably installed with a rotating wheel sliding along the track of the guide groove 15, the rear end bottom of the horizontal section is elastically and slidably installed with a reverse stopping block 151, the reverse stopping block 151 limits the moving direction of the rotating wheel, as shown by the arrow in Figure 8 , the connecting rod 67 moves backward along the horizontal section under the driving of the lifting rod 65, and when the rotating wheel passes through the reverse stopping block 151, the reverse stopping block 151 is pressed and moves downward, when the rotating wheel reaches the connection between the arc section and the horizontal section, the reverse stopping block 151 rebounds, at this time the lifting rod 65 starts to drive the connecting rod 67 to move forward, and the rotating wheel cannot return to the horizontal section due to the limitation of the reverse stopping block 151, so it can only continue to move forward along the arc section, in this process, the connecting rod 67 drives the lifting rod 65 to rise to a certain height, when the rotating wheel reaches the top end of the inclined section, the lifting rod 65 quickly moves downward under the action of gravity and the guide of the inclined section, and the flexible push plate 66 hits the screen 5, the filler particle coating which is pushed to the edge by the flexible push plate 66 and has not had time to be screened is pulled to the middle after being vibrated, and waits to be pushed flat again next time, and the rotating wheel continues to move forward after reaching the horizontal section, and then the horizontal moving rod 62 drives the lifting rod 65 to move backward again.

[0038] Please refer to Figure 2 、 Figure 3 、 Figure 8 and Figure 9 , in order to periodically detect whether the screen 5 appears broken, the application also provides a detection mechanism 7, which is distributed above and below two, and respectively and two screen 5 one-to-one corresponding, the detection mechanism 7 includes a connecting plate 71 arranged at the back of the shell 1 and a rectangular frame 72 connected at both ends of the connecting plate 71, the front end of the rectangular frame 72 is elastically slidingly connected with a push rod 73 through a compression spring, the push rod 73 slidingly penetrates the rear side wall of the shell 1 and extends to the inside of the shell 1, and the ends of the two push rods 73 are jointly installed with a mounting plate 74, the bottom of the mounting plate 74 is provided with two rows of front and rear distributed detection parts 75, and the two rows of detection parts 75 are distributed in the left and right directions, the detection part 75 includes a spring connected to the bottom of the mounting plate 74 and a detection ball fixedly connected to the bottom of the spring, the detection ball abuts against the upper surface of the screen 5 under the elastic force of the spring, every interval, when the lifting rod 65 moves to the front side of the shell 1, stop moving the horizontal moving rod 62, then manually push the connecting plate 71 to move forward, so that the push rod 73 drives the mounting plate 74 and the detection part 75 at the bottom of the mounting plate 74 to move, when the broken range of the screen 5 exceeds the detection ball, then the detection ball will pass through the broken place under the action of the spring when encountering the broken place, and manual continues to push the connecting plate 71 will be blocked, so as to periodically determine whether the screen 5 is broken.

[0039] In addition, in order to eject the detection ball, an L-shaped rod 76 is also arranged at the bottom of the connecting plate 71, the L-shaped rod 76 is connected with a push wedge 77 after penetrating the rear side wall of the shell 1, the upper surface of the push wedge 77 abuts against the lower surface of the screen 5, the rear side wall of the shell 1 is provided with a containing groove 16 containing the push wedge 77 corresponding to the position of the push wedge 77, in the initial state, the push wedge 77 is located in the containing groove 16, and the mounting plate 74 is in contact with the rear side wall of the shell 1, at this time, the push wedge 77 does not hinder the reciprocating flexible push plate 66, it should be noted that the push wedge 77 is located behind the rear row of detection parts 75, so that the detection part 75 cannot move downward due to the limitation of the push wedge 77 when it encounters the broken place.

[0040] In the process of moving forward the connecting plate 71, the L-shaped rod 76 will also push the wedge 77 out of the accommodating groove 16, and the wedge 77 and the detection part 75 move synchronously, when the detection part 75 cannot continue to move by moving down to the broken part, at this time the artificial pushing is blocked, continue to push the connecting plate 71, the push rod 73 does not move, and the rectangular frame 72 and the push rod 73 slide relatively, that is, the spring is compressed, the wedge 77 moving forward uses the inclined surface of its upper surface to push the detection part 75 upward, when the detection part 75 moves out of the broken part, the push rod 73 moves forward under the action of the elastic force, so that the detection part 75 and the wedge 77 are staggered forward and backward, and then the artificial continues to move the connecting plate 71 to detect whether there is other broken part.

[0041] Working process: first, the I-shaped wheel 4 on the unwinding roller is clamped on the corresponding U-shaped frame 3, then the screen 5 is pulled through the rectangular through slot 11 and the accommodation slot 141 and finally fixed on the winding roller, then the I-shaped wheel 4 on the winding roller is also clamped on the corresponding U-shaped frame 3, the lifting plate 14 is lowered and moves downward under the action of gravity, the left end of the screen 5 is fixed, the cylinder 81 is started to make it shrink and drive the strip-shaped plate 82 to move left, the strip-shaped plate 82 drives the two fixed rods 831 to move into the T-shaped slot 12, the inclined surface of the wedge-shaped block 832 pushes the protrusion 835 downward, and then pushes the pressing plate 834 from below the T-shaped slot 12 into the rectangular through slot 11, until the lower surface of the pressing plate 834 presses the edge of the screen 5; at this time the screen 5 is fixed, the filler particle coating falls from the opening above the shell 1, specifically the top of the shell 1 can be fixed on the lower end of the external feeding mechanism, after the filler particle coating falls on the upper screen 5, the filler particle coating meeting the particle size requirement falls from the upper screen 5 to the lower screen 5 and finally falls on the guide plate 2 and is discharged from the discharge port.

[0042] In the process of sieving the filler particle coating, one of the horizontal moving rods 62 is driven to move, specifically by an external electric push rod or a hydraulic cylinder, and the other horizontal moving rod 62 moves in the opposite direction under the driving of the driving gear 64. The upper and lower lifting rods 65 drive the corresponding flexible push plates 66 to move in the opposite direction, pushing the filler particle coating on the screen 5 to flatten and accelerate the sieving. At the same time, the rotating wheel moves along the track of the guide groove 15 under the driving of the connecting rod 67. In this process, the connecting rod 67 moves backward along the horizontal section under the driving of the lifting rod 65. When the rotating wheel passes through the reverse stop block 151, the reverse stop block 151 is pressed downward. When the rotating wheel reaches the connection between the arc-shaped section and the horizontal section, the reverse stop block 151 rebounds. At this time, the lifting rod 65 starts to drive the connecting rod 67 to move forward. However, the rotating wheel cannot return to the horizontal section due to the limitation of the reverse stop block 151, so it can only continue to move forward along the arc-shaped section. The connecting rod 67 drives the lifting rod 65 to rise to a certain height. When the rotating wheel reaches the top of the inclined section, the lifting rod 65 quickly moves downward under the action of gravity and the guidance of the inclined section. The flexible push plate 66 hits the screen 5. The filler particle coating that has been pushed to the edge by the flexible push plate 66 and has not had time to sieve is pulled back to the center after being shaken, waiting to be pushed flat again. The rotating wheel continues to move forward after reaching the horizontal section, and then the horizontal moving rod 62 drives the lifting rod 65 to move backward again.

[0043] Every interval, when the lifting rod 65 moves to the front side of the shell 1, stop moving the horizontal moving rod 62. Then manually push the connecting plate 71 forward, so that the push rod 73 drives the mounting plate 74 and the detection part 75 at the bottom of the mounting plate 74 to move. The L-shaped rod 76 also pushes the wedge 77 out of the accommodating groove 16. When the broken range on the screen 5 exceeds the size of the detection ball, the detection ball will pass through the broken place under the action of the spring when it encounters the broken place. At this time, the manual pushing is blocked, and the push rod 73 does not move, while the rectangular frame 72 slides relative to the push rod 73. The wedge 77 that moves forward uses the inclined surface on its upper surface to lift the detection part 75 upward. When the detection part 75 moves out of the broken place, the push rod 73 moves forward a distance under the action of the elastic force, so that the detection part 75 and the wedge 77 are staggered forward and backward. Then manually move the connecting plate 71 to detect whether there is other broken place. Finally, pull the connecting plate 71 back to its original position, so that the wedge 77 is retracted into the accommodating groove 16. It should be noted that the upper detection mechanism 7 and the lower detection mechanism 7 are staggered to perform the detection work.

[0044] When a broken place is detected, first release the fixation of the screen 5 by the pressing plate 834 and the lifting plate 14, then rotate the winding roller to pull the screen 5 a distance, and the unwinding roller releases the new screen 5. Then use the pressing plate 834 and the lifting plate 14 to fix the screen 5 again.

[0045] In the embodiments of the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature is "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0046] In the description of the present application, it should also be noted that, unless specifically defined and limited otherwise, the terms "provided", "connected", "mounted", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected, or slidingly connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] The embodiments of the specific implementation are the preferred embodiments of the present application, not to limit the protection scope of the present application, so: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A paint processing sieving device, comprising a housing (1) with open upper and lower ends, the bottom of the housing (1) being provided with left and right symmetrical guide plates (2), the upper surface of the guide plates (2) being inclined, and there being a gap between the two guide plates (2), the inside of the housing (1) being provided with a replaceable screen (5), characterized in that: The left side wall of the shell (1) is provided with a rightward extending rectangular through slot (11), the rectangular through slot (11) penetrates the front and rear side walls of the shell (1), but does not completely penetrate the right side wall of the shell (1), two rectangular through slots (11) are provided on the upper and lower sides, U-shaped frames (3) are fixedly installed on the left and right side walls of the shell (1) and located at the front and rear ends of the rectangular through slot (11), the upper surface of the U-shaped frame (3) is lower than the lower surface of the rectangular through slot (11), a roller is arranged between the front and rear U-shaped frames (3), the two ends of the roller are fixedly installed with work-shaped wheels (4) clamped in the U-shaped frame (3), and the two ends of the screen (5) are fixed on the two rollers; The screening device comprises a detection mechanism (7), the detection mechanism (7) comprises a connecting plate (71) arranged at the rear of the shell (1) and a rectangular frame (72) connected at the left and right ends of the connecting plate (71), the front end of the rectangular frame (72) is elastically and slidably connected with a push rod (73), the push rod (73) penetrates the rear side wall of the shell (1) and extends to the inside of the shell (1), and the ends of the two push rods (73) are jointly provided with a mounting plate (74), the bottom of the mounting plate (74) is provided with two rows of front and rear detection portions (75), and the two rows of detection portions (75) are arranged in a left-right direction and are staggered, the detection portion (75) comprises a spring connected to the bottom of the mounting plate (74) and a detection ball fixedly connected to the bottom of the spring, and the detection ball abuts against the upper surface of the screen (5) under the elastic force of the spring; The bottom of the connecting plate (71) is further provided with an L-shaped rod (76), the L-shaped rod (76) penetrates the rear side wall of the shell (1) and is connected with a push wedge (77), the upper surface of the push wedge (77) abuts against the lower surface of the screen (5), the rear side wall of the shell (1) is provided with an accommodating groove (16) corresponding to the position of the push wedge (77), in the initial state, the push wedge (77) is located in the accommodating groove (16), and the mounting plate (74) is in contact with the rear side wall of the shell (1), and the screening device further comprises a material pushing mechanism (6) for pushing the filler particles on the screen (5) flat.

2. A paint processing sieving apparatus as claimed in claim 1, wherein: The right side wall of the shell (1) is provided with two leftward extending T-shaped grooves (12) from top to bottom at the front and rear ends, the T-shaped grooves (12) are located above the corresponding rectangular through slots (11) and are communicated with the rectangular through slots (11), and an edge pressing mechanism (8) for pressing the front and rear side edges of the screen (5) is arranged between the front and rear T-shaped grooves (12), the edge pressing mechanism (8) comprises a gas cylinder (81) fixed to the right side wall of the shell (1) and a strip-shaped plate (82) fixedly connected to the output end of the gas cylinder (81), and one edge pressing assembly (83) for pressing the screen (5) is arranged at each of the front and rear ends of the strip-shaped plate (82) and extends into the T-shaped groove (12).

3. A paint processing sieving apparatus as claimed in claim 1, wherein: The left side wall top of the shell (1) is provided with a downward extending communication groove (13) in communication with the two rectangular through grooves (11), and a lifting plate (14) is slidingly arranged in the communication groove (13), and a limiting block is integrally formed on the top of the lifting plate (14), and two up-and-down distributed and same-width accommodating grooves (141) are formed in the side wall of the lifting plate (14) and the width of the screen (5).

4. A paint processing sieving apparatus as claimed in claim 1, wherein: The pushing mechanism (6) comprises a back-shaped seat (61) fixed to the top end of the rear side wall of the shell (1), the back-shaped seat (61) and the rear side wall of the shell (1) are slidingly provided with transverse rods (62), the opposite surfaces of the two transverse rods (62) are provided with strip-shaped grooves, and the strip-shaped grooves are uniformly provided with teeth (63), and the rear side wall of the shell (1) and between the two transverse rods (62) is further provided with a drive group for driving the two transverse rods (62) to slide in opposite directions, and the transverse rod (62) is vertically provided with a lifting rod (65), and the bottom of the lifting rod (65) is fixedly connected with a flexible push plate (66), and the flexible push plate (66) is in contact with the upper surface of the screen (5).

5. A paint processing sieving apparatus as claimed in claim 4, wherein: The right inner wall of the shell (1) is provided with two up-and-down distributed guide grooves (15), the guide grooves (15) are located above the corresponding rectangular through grooves (11), and the guide grooves (15) are composed of a horizontal section, an inclined section and an arc section, wherein the bottom end of the inclined section is in communication with the middle part of the horizontal section, and the two ends of the arc section are in communication with the top end of the inclined section and the rear end of the horizontal section, the side wall of the lifting rod (65) is fixedly connected with a connecting rod (67), and the end of the connecting rod (67) is rotatably installed with a rotating wheel sliding along the track of the guide groove (15), and the rear end bottom of the horizontal section is elastically slidingly installed with a non-return block (151), and the non-return block (151) is used to limit the moving direction of the rotating wheel.

6. A paint processing sieving apparatus as claimed in claim 2, wherein: The edge pressing assembly (83) comprises a fixed rod (831) vertically fixed to the end of the strip-shaped plate (82), and the edge pressing assembly (83) further comprises a plurality of wedge-shaped blocks (832) slidingly arranged in the T-shaped groove (12), and the adjacent two wedge-shaped blocks (832) are fixedly connected by a connecting rod (833), wherein the rightmost wedge-shaped block (832) is fixedly connected with the fixed rod (831), and the inner part of the T-shaped groove (12) is further slidingly provided with a pressing plate (834) with a magnetic layer on the upper surface, the top wall of the T-shaped groove (12) is an iron layer matched with the magnetic layer, the upper surface of the pressing plate (834) is fixedly connected with a plurality of linearly arranged protrusions (835), and the top of the protrusion (835) is matched with the inclined surface of the wedge-shaped block (832).

7. A paint processing sieving apparatus as claimed in claim 4, wherein: The drive group comprises two drive gears (64) engaged with the teeth (63) in the two transverse rods (62) and a linkage gear engaged with the two drive gears (64), and the drive group further comprises a T-shaped plate fixed to the rear side wall of the shell (1), and the two drive gears (64) and the linkage gear are rotatably installed on the T-shaped plate.

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