An automatic cleaning device for a roller screen

Abstract

This invention discloses an automatic cleaning device for a roller screen, comprising several sets of transmission components, several sets of guide components, a cleaning component, and a return component mounted on a fixed assembly. The transmission components and guide components are alternately arranged at equal intervals along the running direction of the roller screen. The fixed assembly is mounted on the roller screen, and the transmission components and guide components are alternately arranged along the width direction of the roller screen. The cleaning component is mounted on the transmission and guide components, and is equipped with nozzles and hooks, respectively. It performs two sets of actions—scraping and blowing—as it reciprocates along the width direction of the roller screen, causing the sticky material on the rollers to be blown off and the green balls to be lifted. This effectively reduces the frequency of material sticking and jamming on the rollers during the operation of the roller screen, avoids equipment failure caused by material jamming, and significantly reduces the downtime maintenance cost of the roller screen equipment, resulting in high economic benefits.

Description

Technical Field

[0001] This invention relates to the fields of iron and steel, metallurgy, and mining technology, and particularly to an automatic cleaning device for a roller screen. Background Technology

[0002] In the chain grate-rotary kiln oxidation roasting process, green pellet screening is a crucial step in the pellet production line, used to remove green pellet powder and substandard pellets. Green pellet screening equipment typically employs roller screens. Green pellets are fed onto the roller screen by an upper conveyor belt. Due to the gaps between the rollers, green pellets smaller than the standard particle size can fall through these gaps onto the lower return conveyor belt for re-pelleting. Qualified green pellets are then transferred to the chain grate process for drying and preheating.

[0003] However, due to the high surface moisture content of undried balls, they easily stick to the rollers as they pass through the screening machine. If not cleaned in time, the accumulated material thickens, narrowing the gap between the rollers. This causes defective balls to easily get stuck, hindering roller rotation and potentially leading to motor stalling, burnout, and economic losses. Therefore, to address the common issues of material sticking and jamming during production, the screening machine typically needs regular cleaning. Currently, manual cleaning is the most common method; however, this is inefficient, time-consuming, and requires machine downtime, impacting production cycle and output. Therefore, considering the shortcomings of existing technology, it is necessary to design an efficient, online automatic cleaning device for roller screening machines that can effectively remove stuck and sticking materials. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic cleaning device for roller screens that can clean jammed and stuck materials in real time, effectively improving the efficiency of equipment use.

[0005] Therefore, the technical solution of the present invention is as follows:

[0006] An automatic cleaning device for a roller screen includes several sets of transmission components, several sets of guiding components, a cleaning component, and a return component mounted on a fixed assembly; the transmission components and guiding components are alternately arranged at equal intervals along the running direction of the roller screen; wherein,

[0007] The fixing assembly includes several support beams fixed to the bottom surface and two fixing beams fixed to the top of the support beams; the two fixing beams are mounted above the roller screen with their planes parallel to the top surface of the roller screen.

[0008] The transmission assembly includes a motor mounting plate, a geared motor, a drive wheel, a driven wheel assembly, and a chain. The geared motor is arranged such that the axis of its output shaft is in the same direction as the running direction of the roller screen, and is fixed to a fixed beam by the motor mounting plate. The drive wheel is fixed to the end of the output shaft of the geared motor. The driven wheel assembly is fixed to another fixed beam, and the driven wheel on it is arranged in the same plane as the drive wheel and connected by a chain, so that the driven wheel drives the driven wheel to rotate synchronously.

[0009] The guide assembly includes a guide shaft, a guide sleeve fixing plate, and a guide sleeve connecting clamp. The two ends of the guide shaft are fixed to two fixing beams by guide shaft fixing seats. The guide sleeve fixing plate is fitted onto the guide shaft, and its bottom is fixed to the top surface of the guide sleeve connecting clamp. The guide sleeve connecting clamp is formed by stacking and connecting an upper connecting block and a lower connecting block. Two semi-circular through slots are symmetrically opened on the top surface of the lower connecting block, and two semi-circular through slots are symmetrically opened on the bottom surface of the upper connecting block, so that two cylindrical through holes are formed at the junction of the stacked lower connecting block and the upper connecting block.

[0010] The cleaning assembly includes an air duct, a hook pipe, and a traveling assembly. The air duct and hook pipe are two long pipes arranged side-by-side above the roller screen, running in the same direction. They are respectively inserted into and fixed within the through holes of the guide sleeve connecting clamps of the three sets of guide assemblies. N openings are evenly distributed on the side wall of the air duct, each opening connected to N air nozzles via a universal connector, allowing the blowing angle of each nozzle to be 360° adjustable. An air inlet pipe is installed on one end of the side wall of the air duct. The hook pipe has evenly distributed... N hooks are arranged in an alternating pattern with N air nozzles, with each air nozzle corresponding to one of the rollers. The N hooks are positioned in the gaps between adjacent rollers, with each hook having a bent bottom to lift any unfilled balls that fall into the gaps between adjacent rollers as the hook tube moves. The traveling assembly is fixed to the chain on the upper side and threaded and fixed to the outside of the air duct and hook tube on the lower side, so that the chain drives the two to reciprocate along the width of the roller screen.

[0011] The return assembly consists of N return mechanisms, which are evenly distributed on the roller support adjacent to the hook tube on the roller screen, and are respectively set at the positions corresponding to the N hooks. The return mechanism consists of a return base plate, a connecting frame and a U-shaped guide groove connected in sequence from bottom to top. The inner channel of the U-shaped guide groove is set towards the roller side and at an angle downward. The opening width and setting height of the guide groove are adapted to the size and setting height of the hook, so that when the cleaning assembly moves to the return assembly, the bottom end of the hook can be flipped along the guide groove to completely detach from the working surface of the roller.

[0012] Furthermore, the driven wheel assembly consists of a driven wheel fixing frame, a driven shaft, a driven wheel, an assembly fixing plate, a top block, an adjusting screw, and a slider. The driven wheel fixing frame is an L-shaped frame composed of a short fixing plate and a long fixing plate arranged vertically and connected to each other. Both the short and long fixing plates are vertically arranged, with the short fixing plate fixed to the transmission assembly fixing plate. The assembly fixing plate is fixed to the inner surface of the long fixing plate, and both the assembly fixing plate and the long fixing plate have through holes in the transverse direction. The slider and the top block are spaced laterally on the surface of the assembly fixing plate. The top block is fixed to the assembly fixing plate. The slider extends from the edge of the plate adjacent to the top block towards... An extension plate is formed on the outer side; a first threaded hole and a second threaded hole are coaxially arranged along the transverse direction on the top block and the connecting plate, so that the slider and the top block are connected as one unit by an adjusting screw passing between the first threaded hole and the second threaded hole, and the distance between the slider and the top block can be adjusted by controlling the length of the adjusting screw screw screwed into the second threaded hole; the rear side of the driven shaft is inserted and fixed in the central through hole of the slider, and its front side is sequentially inserted into the strip through holes on the component fixing plate and the long fixing plate, so that the relative position of the driven shaft is adjustable; the driven wheel is rotatably mounted on the driven shaft with its wheel surface parallel to the surface of the long fixing plate and is limited and fixed by a shaft retaining spring set at the front end of the driven shaft.

[0013] Furthermore, the hook consists of a duct fixing ring and two L-shaped hooks; the two L-shaped hooks are arranged vertically in a natural hanging manner, with one end fixed to the same position on the outer wall of the fixing ring, and the other end bent at 90° to both sides.

[0014] Furthermore, the nozzle is positioned at an angle, with its outlet directly above the corresponding roller. Even further, the angle α between the nozzle's axis and the hook's axis is 15°.

[0015] Furthermore, the walking assembly includes a lower clamping block, an upper clamping block, a movable plate, and two rows of L-shaped chain bends;

[0016] The lower clamping block and the upper clamping block are two rectangular blocks stacked together. The top surface of the lower clamping block has two semi-circular through slots symmetrically opened, and the bottom surface of the upper clamping block has two semi-circular through slots symmetrically opened, so that two cylindrical through holes are formed at the junction of the stacked lower clamping block and the upper clamping block. A rectangular through slot is opened on the top surface of the upper clamping block along the axial direction of the cylindrical through hole.

[0017] The movable plate is a rectangular plate stacked on the upper clamping block. Its bottom surface extends downward from the center to form a rectangular protrusion that can be embedded in a rectangular through slot. The width of the rectangular through slot is slightly larger than the width of the rectangular protrusion. The movable plate is stacked on the upper clamping block with its rectangular protrusion embedded in the rectangular through slot on the top surface of the upper clamping block. Two rows of L-shaped chain bending plates are symmetrically arranged along the length direction and spaced apart on the top surface of the movable plate. The bottom plates of the two are fixed to the movable plate, and the vertical plates of the two are clamped and fixed to both sides of the chain. The lower clamping block, the upper clamping block and the movable plate are connected and fixed as a whole in sequence.

[0018] Furthermore, the lower clamping block, the upper clamping block, and the movable plate are connected and fixed as a whole from bottom to top by four connecting screws set at the four apex corners of the three and matching nuts set at the ends of each connecting screw. Each connecting screw has a matching hexagonal slotted nut threaded to its end. A pin hole is provided at the tail end of each connecting screw, and a cotter pin is detachably installed inside it.

[0019] Furthermore, the automatic cleaning device for the roller screen also includes a PLC controller installed in the on-site electrical cabinet and a host computer installed in the remote control center; wherein, the PLC controller is electrically connected to the geared motor to control the rotation speed and rotation direction of the output shaft of the geared motor; the PLC controller is electrically connected to a first photoelectric conversion device, and the host computer is electrically connected to a second photoelectric conversion device, and the first photoelectric conversion device and the second photoelectric conversion device are connected by optical fiber.

[0020] Compared with existing technologies, this automatic cleaning device for roller screens uses chain drive to make the cleaning component reciprocate along the axis of the roller screen's rollers. During the reciprocating motion, the hooks and nozzles in the cleaning component perform two sets of actions: scraping and blowing. The hooks push out material stuck in the gaps between the rollers, while the nozzles, positioned on the rollers and featuring a flat structure, have a large blowing area and adjustable angle, ensuring that the material stuck to the rollers is blown off promptly. This design effectively reduces the frequency of material sticking and jamming on the rollers, effectively avoiding equipment failures caused by jamming, significantly reducing downtime maintenance costs for the roller screen equipment, and resulting in high economic benefits. Attached Figure Description

[0021] Figure 1 This is a top view of the automatic cleaning device for the roller screen of the present invention;

[0022] Figure 2 This is an isometric view of the automatic cleaning device for the roller screen of the present invention;

[0023] Figure 3 This is a schematic diagram of the transmission assembly of the automatic cleaning device for the roller screen of the present invention;

[0024] Figure 4 This is a schematic diagram of the driven wheel assembly of the automatic cleaning device for the roller screen of the present invention;

[0025] Figure 5(a) is a side view of the cleaning assembly of the automatic cleaning device for the roller screen of the present invention;

[0026] Figure 5(b) is a top view of the cleaning assembly of the automatic cleaning device for the roller screen of the present invention;

[0027] Figure 6 This is a side view of the cleaning assembly of the automatic cleaning device for the roller screen of the present invention.

[0028] Figure 7 This is a schematic diagram of the hook structure of the automatic cleaning device for the roller screen of the present invention;

[0029] Figure 8 This is a schematic diagram of the walking assembly of the automatic cleaning device for the roller screen of the present invention;

[0030] Figure 9 This is a schematic diagram of the structure of the return component of the automatic cleaning device for the roller screen of the present invention;

[0031] Figure 10(a) is a side view of the connection method of the guide sleeve, guide sleeve fixing plate and guide sleeve connecting clamp of the cleaning component of the automatic cleaning device for roller screen of the present invention.

[0032] Figure 10(b) is a vertical view of the connection method of the guide sleeve, guide sleeve fixing plate and guide sleeve connecting clamp of the cleaning component of the automatic cleaning device for roller screen of the present invention. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the following embodiments are not intended to limit the present invention in any way. In this embodiment, since the automatic cleaning device of the roller screen is located at the roller screen, for ease of description and understanding, the running direction of the roller screen is taken as the front end of the automatic cleaning device of the roller screen, i.e. Figure 1 As shown on the left, the direction opposite to the running direction of the roller screen is the rear end of the automatic cleaning device of the roller screen, i.e. Figure 1 As shown on the right, and further based on the front and rear ends of the automatic cleaning device for the roller screen, such as Figure 1 The upper side shown is the right side of the automatic cleaning device of the roller screen, such as... Figure 1 The lower side shown is the left side of the automatic cleaning device of the roller screen.

[0034] like Figure 1 As shown, the automatic cleaning device of the roller screen includes two sets of transmission components 2, three sets of guide components 3, a cleaning component 4, and a return component 5, all mounted on a fixed component 1.

[0035] See Figure 2 The fixing component 1 comprises six support beams 1-1, one left-side fixing beam 1-2, one right-side fixing beam 1-3, two transmission component fixing plates 1-4, and three pairs of guide component fixing plates 1-5; specifically,

[0036] Six support beams 1-1 are symmetrically distributed on the left and right sides of the roller screen. Three support beams 1-1 are vertically arranged on each side of the roller screen, and the spacing between the two support beams 1-1 on the same side is adapted to the length of the fixed beam. The spacing between the three support beams 1-1 on both sides and in symmetrical positions is adapted to the length of the transmission component fixed plate 1-4 or the guide component fixed plate 1-5. The support beams 1-1 are made of structural steel. In order to fix the support beams 1-1 in their positions, a fixed plate is welded to the bottom surface of each support beam 1-1. Through holes are opened at the four top corners of the fixed plate, so that the support beams 1-1 are fixed to the ground by anchor bolts inserted at the four top corners of the fixed plate.

[0037] Each support beam 1-1 has a support plate welded to its top surface. Meanwhile, because the top surface of the roller screen is an inclined surface to facilitate the rolling of green balls from top to bottom, the heights of the three support beams 1-1 on the same side increase in a gradient. This allows the left fixed beam 1-2 and right fixed beam 1-3 to be welded and fixed at the same angle to the support plates on top of the three support beams 1-1 on the same side, and symmetrically distributed on the left and right sides of the roller screen. The planes containing the left fixed beam 1-2 and right fixed beam 1-3 are parallel and higher than the top surface of the roller screen. The left fixed beam 1-2 and right fixed beam 1-3 are also made of structural steel.

[0038] Since the two sets of transmission components 2 and the three sets of guide components 3 are designed to be alternately arranged at equal intervals along the running direction of the roller screen, the three pairs of guide component fixing plates 1-5 are symmetrically fixed on the inner walls opposite the front end, the inner walls opposite the middle, and the inner walls opposite the rear end of the left fixed beam 1-2 and the right fixed beam 1-3, respectively; the two transmission component fixing plates 1-4 are fixed on the inner wall of the right fixed beam 1-3 and are located between each two adjacent guide component fixing plates 1-5.

[0039] See Figure 3 The transmission assembly 2 includes a motor mounting plate 2-1, a reduction motor 2-2, a drive wheel 2-3, a driven wheel assembly 2-4, and a chain 2-5; specifically,

[0040] The motor mounting plate 2-1 is fixed to the left fixed beam 1-2 by bolts. Two strip-shaped mounting holes are symmetrically opened on both sides of the plate, so as to adjust the mounting position of the geared motor 2-2 on the motor mounting plate 2-1 through the strip-shaped mounting holes.

[0041] The geared motor 2-2 is set with its output shaft axis in the same direction as the running direction of the roller screen and facing the rear end of the roller screen, and is fixed to the motor mounting plate 2-1 by bolts; the drive wheel 2-3 is inserted and fixed to the output shaft end of the geared motor 2-2 by interference fit;

[0042] See Figure 4 The driven wheel assembly 2-4 consists of a driven wheel fixing bracket 2-4-1, a driven shaft 2-4-2, a driven wheel 2-4-3, an assembly fixing plate 2-4-4, a top block 2-4-5, an adjusting screw 2-4-6, and a slider 2-4-7; wherein,

[0043] Driven wheel mounting bracket 2-4-1 is an L-shaped frame consisting of a short mounting plate and a long mounting plate that are vertically arranged and connected. Two reinforcing plates are also connected between the short mounting plate and the long mounting plate to reinforce the structure of the L-shaped frame. Both the short mounting plate and the long mounting plate are vertically arranged. The short mounting plate is fixed to the transmission assembly mounting plate 1-4 with screws. The long mounting plate is used to install other components of the driven wheel assembly 2-4.

[0044] The component fixing plate 2-4-4 is detachably fixed to the inner side of the long fixing plate by bolts, and both the component fixing plate 2-4-4 and the long fixing plate have through holes in the transverse direction.

[0045] Slider 2-4-7 and top block 2-4-5 are spaced laterally on the surface of component fixing plate 2-4-4; top block 2-4-5 is fixed to component fixing plate 2-4-4 by screws; slider 2-4-7 is a plate structure, which extends outward from the edge of the plate surface adjacent to top block 2-4-5 to form a connecting plate; top block 2-4-5 and connecting plate are provided with a through first screw hole and a second screw hole arranged coaxially, so that slider 2-4-7 and top block 2-4-5 are connected as one unit by adjusting screw 2-4-6 passing between the first screw hole and the second screw hole, and the distance between slider 2-4-7 and top block 2-4-5 can be adjusted by controlling the length of adjusting screw 2-4-6 screwed into the second screw hole;

[0046] The rear side of the driven shaft 2-4-2 is inserted and fixed in the central through hole of the slider 2-4-7, and its front side is sequentially inserted into the strip-shaped through holes on the component fixing plate 2-4-4 and the long fixing plate, so that the relative position of the driven shaft 2-4-2 is adjustable; the driven wheel 2-4-3 is rotatably mounted on the driven shaft 2-4-2 with its wheel surface parallel to the surface of the long fixing plate, and is limited and fixed by the shaft retaining spring set at the front end of the driven shaft 2-4-2;

[0047] The driven wheel assembly 2-4 has its driven wheel fixing frame 2-4-1's short fixing plate fixed to the right-side fixing beam 1-3, with the driven wheel 2-4-3 and the driving wheel 2-3 located on the same vertical plane; the distance between the driven wheel 2-4-3 and the driving wheel 2-3 is adjusted by adjusting the distance between the slider 2-4-7 and the top block 2-4-5.

[0048] One side of the chain 2-5 is fitted onto the driving wheel 2-3, and the other side is fitted onto the driven wheel 2-4-3, forming a chain drive mechanism between the driving wheel 2-3, the driven wheel 2-4-3, and the chain 2-5; the tension of the chain 2-5 is achieved by adjusting the distance between the slider 2-4-7 and the top block 2-4-5.

[0049] Referring to Figures 10(a) and 10(b), three sets of guide components 3 are respectively arranged between each pair of guide component fixing plates 1-5; the guide component 3 consists of two guide shaft fixing seats 3-1, one guide shaft 3-2, one guide sleeve 3-3, one guide sleeve fixing plate 3-4, and one guide sleeve connecting clamp 3-5; wherein,

[0050] The guide shaft fixing seat 3-1 consists of a base plate and a cylindrical sleeve fixed in the center on the surface of the base plate. Its axial section is T-shaped. Specifically, the inner diameter of the cylindrical sleeve is adapted to the outer diameter of the guide shaft 3-2, and mounting holes are symmetrically opened on the base plate.

[0051] The guide shaft 3-2 is a cylindrical long rod, with its two ends respectively fitted into the cylindrical sleeves of the guide shaft fixing seat 3-1. The guide shaft 3-2 is fixed between the left fixed beam 1-2 and the right fixed beam 1-3 in a manner perpendicular to the running direction of the roller screen by fixing the bottom plate of the guide shaft fixing seat 3-1 to the two symmetrically arranged guide component fixing plates 1-5 with screws.

[0052] The guide sleeve 3-3 is composed of a rectangular vertical plate and a cylindrical sleeve; the cylindrical sleeve is inserted and fixed in the central through hole of the rectangular vertical plate; the inner diameter of the cylindrical sleeve is larger than the outer diameter of the guide shaft 3-2, so that the guide sleeve 3-3 can be fitted onto the outside of the guide shaft 3-2 and move freely on the guide shaft 3-2;

[0053] The guide sleeve fixing plate 3-4 is a horizontally arranged rectangular plate, which is set below the guide sleeve 3-3, so that the bottom edge of the rectangular plate of the guide sleeve 3-3 is fixed on the center line of the long side of the top surface of the guide sleeve fixing plate 3-4; as a preferred technical solution of this embodiment, a reinforcing plate is fixed on the bottom side of each side plate of the rectangular plate of the guide sleeve 3-3, and the bottom of the reinforcing plate is fixed on the guide sleeve fixing plate 3-4.

[0054] The guide sleeve connecting clamp 3-5 is composed of an upper connecting block and a lower connecting block stacked together. The top surface of the lower connecting block has two semi-circular through slots symmetrically opened, and the bottom surface of the upper connecting block has two semi-circular through slots symmetrically opened, so that two cylindrical through holes are formed at the junction of the stacked lower connecting block and the upper connecting block. The upper connecting block and the lower connecting block are detachably connected and fixed together by screws. The size of the guide sleeve fixing plate 3-4 is the same as that of the upper connecting block, so that the guide sleeve fixing plate 3-4 is fixed to the upper connecting block by screws set at the four top corners.

[0055] Referring to Figures 5(a) and 5(b), the cleaning component 4 includes an air duct 4-1-1, a hook pipe 4-1-2, and a traveling component 4-4. The air duct 4-1-1 and hook pipe 4-1-2 are two long pipes arranged side-by-side above the roller screen along the running direction of the roller screen. They are respectively inserted into and fixed within the through holes of the guide sleeve connecting clamps 3-5 of the three sets of guide components 3. The traveling component 4-4 is inserted into and fixed to the outside of the air duct 4-1-1 and hook pipe 4-1-2 to drive them to reciprocate along the width direction of the roller screen.

[0056] The air duct 4-1-1 includes a steel pipe body closed at both ends, N air nozzles 4-2, and an air inlet pipe 4-5. N openings are evenly distributed on the side wall of the pipe body, with the spacing between adjacent openings corresponding to the spacing between adjacent rollers on the roller screen, so that each of the N openings corresponds to one of the rollers on the roller screen. Each opening is connected to one of the N air nozzles 4-2 via a universal connector 4-2-1, allowing the blowing angle of each air nozzle 4-2 to be adjusted 360°. The air inlet pipe 4-5 is located on one end of the side wall of the pipe body, connecting the inner cavity of the air duct 4-1-1 to an external air source via an air supply line connected to the end of the air inlet pipe 4-5. Air then enters the air duct 4-1-1 and is used by the air nozzles 4-2 to blow air onto the rollers.

[0057] The hook tube 4-1-2 includes a steel tube body and N hooks 4-3; the N-1 hooks 4-3 are evenly distributed on the tube body and are staggered with the N air nozzles 4-2 on the air duct 4-1-1, so that the N air nozzles 4-2 are positioned directly above each of the rollers, and the N-1 hooks 4-3 are positioned directly above the gaps between adjacent rollers; for example Figure 7As shown, hook 4-3 consists of a fixing ring 4-3-2 and two L-shaped hooks 4-3-1. The inner diameter of the fixing ring 4-3-2 is slightly larger than the outer diameter of the hook tube 4-1-2, allowing it to fit over the outside of the hook tube 4-1-2. The two L-shaped hooks 4-3-1 are arranged vertically in a natural hanging manner, with one end fixed to the same position on the outer wall of the fixing ring 4-3-2, and the other end bent at 90° to both sides. The length of hook 4-3 is adapted to the distance between the hook tube 4-1-2 and the lower roller, so that the bottom end of hook 4-3 slightly protrudes into the roller. To the gap between adjacent rollers, so that as it moves along the width direction of the roller screen, the bottom bent end can lift up the green ball that falls into the gap between adjacent rollers, so as to ensure that the air nozzle blows the rollers completely; in addition, in order to ensure that the position of each hook does not move, after determining the insertion position of each hook 4-3 on the outside of the hook tube 4-1-2, annular limiting members or other limiting members of any kind are set and fixed on the hook tube 4-1-2 located on both sides of the hook 4-3 to prevent the position of each hook 4-3 from moving during use;

[0058] The value of N is determined based on the number of rollers that need to be cleaned, that is, the same as the number of rollers on the roller screen. In this embodiment, the roller screen has 21 rollers, 21 air nozzles 4-2, and 20 hooks 4-3.

[0059] As a preferred technical solution of this embodiment, in order to increase the sweeping area of ​​the roller on the roller screen, the setting angle of the air nozzle 4-2 is: the angle α between the axial direction of the air nozzle 4-2 and the axial direction of the hook 4-3 is 15°, and the outlet end of the air nozzle 4-2 is located directly above its corresponding roller.

[0060] See Figure 8 The walking assembly 4-4 consists of a lower clamping block 4-4-1, an upper clamping block 4-4-2, a movable plate 4-4-3, a hexagonal slotted nut 4-4-4, a connecting screw 4-4-5, a cotter pin 4-4-6, and a chain bend 4-4-7; specifically,

[0061] The lower clamping block 4-4-1 and the upper clamping block 4-4-2 are two rectangular blocks stacked together. The top surface of the lower clamping block 4-4-1 has two symmetrical semi-circular through slots, and the bottom surface of the upper clamping block 4-4-2 has two symmetrical semi-circular through slots, so that two cylindrical through holes are formed at the junction of the stacked lower clamping block 4-4-1 and upper clamping block 4-4-2. The inner diameter of the cylindrical through holes is the same as the outer diameter of the steel pipe 4-2, so that the air duct 4-1-1 and the hook pipe 4-1-2 pass through the two cylindrical through holes respectively and are clamped and fixed by the lower clamping block 4-4-1 and the upper clamping block 4-4-2. A rectangular through slot is formed on the top surface of the upper clamping block 4-4-2 along the axial direction of the cylindrical through hole.

[0062] The movable plate 4-4-3 is a rectangular plate stacked on the upper clamping block 4-4-2. Its bottom surface extends downward from the center to form a rectangular protrusion that can be embedded in a rectangular through groove. The width of the rectangular through groove is slightly larger than the width of the rectangular protrusion. The movable plate 4-4-3 is stacked on the upper clamping block 4-4-2 with its rectangular protrusion embedded in the rectangular through groove on the top surface of the upper clamping block 4-4-2. Two rows of L-shaped chain bending plates 4-4-7 are symmetrically arranged along the length direction and spaced apart on the top surface of the movable plate 4-4-3. The bottom plate of the L-shaped chain bending plate 4-4-7 is fixed to the movable plate 4-4-3 with screws. The vertical plate of the L-shaped bending plate is connected to the chain 2-5 with screws. The walking component 4-4 moves back and forth with the chain 2-5, which drives the cleaning component 4 to move back and forth synchronously along the width direction of the roller screen.

[0063] The lower clamping block 4-4-1, the upper clamping block 4-4-2, and the movable plate 4-4-3 are connected and fixed as a whole from bottom to top by four connecting screws 4-4-5 set at the four corners of the three and matching nuts set at the ends of each connecting screw. Each connecting screw 4-4-5 is threaded with a matching hexagonal slotted nut 4-4-4 at its end. At the same time, in order to further prevent the connecting screws 4-4-5 from coming out, a pin hole is provided at the tail end of each connecting screw 4-4-5, and a cotter pin 4-4-6 is detachably installed in it.

[0064] The regression component 5 consists of N-1 regression mechanisms, which are evenly distributed on the roller support on one side of the roller screen and are respectively set at the positions corresponding to N-1 hooks; the roller screen side is the initial setting side of the cleaning component 4, and is also the side adjacent to the hook tube 4-1-2; in this embodiment, the number of regression mechanisms is 20.

[0065] See Figure 9 The return mechanism consists of a return base plate 5-1, a connecting frame 5-2, and a U-shaped guide groove 5-3. Specifically, the return base plate 5-1 is a Z-shaped plate formed by connecting a first horizontal plate, a vertical plate, and a second horizontal plate in sequence. Two strip-shaped mounting holes are symmetrically arranged on the first horizontal plate, which are fixed to the roller support of the roller screen by screws set in the mounting holes. The connecting frame 5-2 is a vertically arranged trapezoidal plate, the bottom surface of which is welded and fixed to the second horizontal plate, and one of its inclined sides is fixed in the middle to the bottom surface of the U-shaped guide groove 5-3, and the inner channel of the guide groove 5-3 is set towards the roller side and inclined downward.

[0066] The opening width and setting height of the guide groove 5-3 are adapted to the size and setting height of the hook 4-4, so that the bottom end of the hook 4-4 can be flipped upward along the guide groove 5-3 until it is completely separated from the working surface of the roller, without hindering the subsequent normal operation of the roller screen. In specific applications, when the cleaning component retracts to the side with the return component, as it retracts further, the hook flips along the guide groove 5-3 to leave the gap between the rollers. The inclination angle of the guide groove 5-3 is set according to the actual situation to control the corresponding flipping state of the hook, thereby ensuring that it can be completely separated from the working surface of the roller.

[0067] To further realize the automated cleaning function of the device, the device also includes a PLC controller installed in the field electrical cabinet and a host computer installed in the remote control center. The PLC controller is electrically connected to the geared motor 2-2 to control the operating status of the geared motor 2-2, including its rotation speed and direction. The PLC controller is also electrically connected to the first photoelectric conversion device to convert the control signal of the PLC controller into an optical signal, or to convert the optical signal received by the first photoelectric conversion device into an electrical signal, thereby modifying the control signal of the PLC controller. The second photoelectric conversion device is electrically connected to the host computer in the remote control center, and is also connected to the first photoelectric conversion device through optical fiber to realize the mutual conversion between optical and electrical signals. This enables the industrial control computer to receive the control signal of the PLC controller, or to remotely modify the control signal of the PLC controller through the industrial control computer, so as to realize the device to perform unattended cleaning operation mode or manual intervention cleaning operation mode.

[0068] The working principle of this automatic cleaning device for a roller screen is as follows:

[0069] The PLC controller controls the forward and reverse rotation of the geared motor 2-2, causing the drive wheel 2-3 on the geared motor 2-2 to rotate. This drives the chain 2-5 mounted on the drive wheel 2-3 to reciprocate. Because the walking component 4-4 in the cleaning assembly 4 is connected to the chain 2-5, the cleaning assembly 4 can travel along the axis of the roller from one end to the other along the chain 2-5, thus reciprocating. During one operating cycle, the hook 4-3 and the nozzle 4-2 in the cleaning assembly 4 perform both scraping and blowing actions. Because the hooks 4-3 on the cleaning assembly are located in the gap between two adjacent rollers, the bent part at the bottom of the hooks 4-3 can push out the stuck material in the gap during the movement. At the same time, the air nozzles 4-2 on the cleaning assembly are positioned above the rollers and have a flat structure, providing a large blowing area and adjustable angle, so that the sticky material on the rollers is blown off in time. After completing one cleaning cycle (i.e., the cleaning assembly moves back and forth from the return assembly 5 once and then returns to the return assembly 5), the cleaning assembly 4 automatically retracts to one side of the roller screen. At point 5, the hook in cleaning component 4 retracts into the U-shaped groove of the guide channel. The hook changes from its original vertical position to an oblique or horizontal position within the guide channel, causing the bottom hook to leave the gap between the rollers. This completes the retraction of the cleaning component from the working surface of the roller screen, without interfering with the normal operation of the equipment. When the roller screen is shut down for maintenance, the automatic cleaning device is controlled by a PLC controller or host computer to execute a retraction command, allowing the automatic cleaning device to automatically complete the retraction and facilitate normal equipment maintenance. In practical applications, the PLC controller can be connected to the first photoelectric conversion device via a network cable, and the first photoelectric conversion device can be connected to the second photoelectric conversion device via optical fiber. The host computer can also be connected to the second photoelectric conversion device via a network cable, establishing communication between the PLC controller and the host computer. The host computer can monitor the working status of the cleaning component in real time through the PLC controller and can also manually intervene in the working status of the cleaning component.

Claims

1. An automatic cleaning device for a roller screen, characterized in that, It includes several sets of transmission components (2), several sets of guide components (3), a cleaning component (4), and a return component (5) installed on the fixed component (1); the several sets of transmission components (2) and several sets of guide components (3) are arranged alternately at equal intervals along the running direction of the roller screen; among them, The fixed assembly (1) includes several support beams (1-1) fixed on the bottom surface and two fixed beams fixed on the top of the support beams; the two fixed beams are mounted above the roller screen in such a way that their planes are parallel to the top surface of the roller screen. The transmission assembly (2) includes a motor mounting plate (2-1), a geared motor (2-2), a drive wheel (2-3), a driven wheel assembly (2-4), and a chain (2-5). The geared motor (2-2) is arranged such that the axis of its output shaft is in the same direction as the running direction of the roller screen, and is fixed to a fixed beam by the motor mounting plate (2-1). The drive wheel (2-3) is fixed to the end of the output shaft of the geared motor (2-2). The driven wheel assembly (2-4) is fixed to another fixed beam, and the driven wheel (2-4-3) on it is arranged in the same plane as the drive wheel (2-3) and connected by the chain (2-5) so that the driven wheel (2-4-3) can be driven to rotate synchronously by the drive wheel (2-3). The guide assembly (3) includes a guide shaft (3-2), a guide sleeve fixing plate (3-4), and a guide sleeve connecting clamp (3-5); the two ends of the guide shaft (3-2) are fixed to two fixed beams through the guide shaft fixing seat (3-1); the guide sleeve fixing plate (3-4) is fitted on the guide shaft (3-2), and its bottom is fixed on the top surface of the guide sleeve connecting clamp (3-5); the guide sleeve connecting clamp (3-5) is formed by stacking and connecting an upper connecting block and a lower connecting block, and two semi-circular through slots are symmetrically opened on the top surface of the lower connecting block and two semi-circular through slots are symmetrically opened on the bottom surface of the upper connecting block, so that two cylindrical through holes are formed at the junction of the stacked lower connecting block and the upper connecting block; The cleaning component (4) includes a duct (4-1-1), a hook pipe (4-1-2), and a walking component (4-4). The duct (4-1-1) and the hook pipe (4-1-2) are two long pipes arranged side by side above the roller screen along the running direction of the roller screen. They are respectively inserted into and fixed in the through holes of the guide sleeve connecting clamps (3-5) of the three sets of guide components (3). N openings are evenly distributed on the side wall of the duct (4-1-1). Each opening is connected to N nozzles (4-2) one by one through a universal connector (4-2-1), so that the blowing angle of each nozzle (4-2) is adjustable 360°. An air inlet pipe (4-5) is provided on the side wall of one end of the duct. The hook pipe (4-1-2) is evenly distributed on the side wall. N-1 hooks (4-3) are provided, and the N-1 hooks (4-3) and N air nozzles (4-2) are arranged in an alternating manner, so that the N air nozzles (4-2) are respectively positioned above each roller, and the N-1 hooks (4-3) are respectively positioned in the gap between two adjacent rollers. The bottom end of each hook (4-3) is set as a bent end, so that the raw balls falling into the gap between adjacent rollers can be lifted up during the movement of the hook tube (4-1-2). The upper part of the walking component (4-4) is fixed on the chain (2-5), and the lower part is threaded and fixed on the outside of the air tube (4-1-1) and the hook tube (4-1-2), so that the chain (2-5) drives the two to reciprocate along the width direction of the roller screen. The return assembly (5) consists of N-1 return mechanisms, which are evenly distributed on the roller support of the roller screen adjacent to the hook tube (4-1-2), and are respectively set at the positions corresponding to N-1 hooks (4-3). The return mechanism consists of a return base plate (5-1), a connecting frame (5-2) and a U-shaped guide groove (5-3) connected from bottom to top. The inner channel of the U-shaped guide groove 5-3 is set to face the roller side and is inclined downward. The opening width and setting height of the guide groove (5-3) are adapted to the size and setting height of the hook (4-3) so that when the cleaning assembly (4) moves to the return assembly (5), the bottom end of the hook (4-3) can be flipped along the guide groove (5-3) to completely detach from the working surface of the roller.

2. The automatic cleaning device for the roller screen according to claim 1, characterized in that, The driven wheel assembly (2-4) consists of a driven wheel fixing frame (2-4-1), a driven shaft (2-4-2), a driven wheel (2-4-3), an assembly fixing plate (2-4-4), a top block (2-4-5), an adjusting screw (2-4-6), and a slider (2-4-7). The driven wheel fixing frame (2-4-1) is an L-shaped frame composed of a short fixing plate and a long fixing plate that are vertically arranged and connected. Both the short and long fixing plates are vertically arranged, and the short fixing plate is fixed to the transmission assembly. The component fixing plate (1-4) is fixed on the inner side of the long fixing plate; the component fixing plate (2-4-4) is fixed on the inner side of the long fixing plate, and both the component fixing plate (2-4-4) and the long fixing plate have through holes in the transverse direction; the slider (2-4-7) and the top block (2-4-5) are spaced apart in the transverse direction on the surface of the component fixing plate (2-4-4); the top block (2-4-5) is fixed on the component fixing plate (2-4-4); the slider (2-4-7) is connected to the top block (2-4-5) by means of the component fixing plate (1-4-4); the component fixing plate (2-4-7) is fixed on the component fixing plate (2-4-4); the component fixing plate (2-4-7) is fixed on the inner side of the long fixing plate (2-4-4); the component fixing plate (2-4-4) is fixed on the inner side of the long fixing plate (1 ... 4-5) Connecting plates are formed by extending outwards from the edges of adjacent plates; the top block (2-4-5) and the connecting plate have a first threaded hole and a second threaded hole arranged coaxially, so that the slider (2-4-7) and the top block (2-4-5) are connected as one unit by an adjusting screw (2-4-6) passing between the first threaded hole and the second threaded hole, and the slider (2-4-7) and the top block (2-4-5) are connected by controlling the length of the adjusting screw (2-4-6) screwed into the second threaded hole. The spacing between them is adjusted; the rear side of the driven shaft (2-4-2) is inserted and fixed in the central through hole of the slider (2-4-7), and its front side is sequentially inserted into the strip through holes on the component fixing plate (2-4-4) and the long fixing plate, so that the relative position of the driven shaft (2-4-2) is adjustable; the driven wheel (2-4-3) is rotatably mounted on the driven shaft (2-4-2) with its wheel surface parallel to the surface of the long fixing plate, and is limited and fixed by the shaft retaining spring set at the front end of the driven shaft (2-4-2).

3. The automatic cleaning device for the roller screen according to claim 1, characterized in that, The hook (4-3) consists of a fixed ring 4-3-2 and two L-shaped hooks (4-3-1) fitted onto the duct fixing ring. The two L-shaped hooks (4-3-1) are arranged vertically in a natural hanging manner, with one end fixed to the same position on the outer wall of the fixing ring (4-3-2) and the other end bent at 90° to both sides.

4. The automatic cleaning device for the roller screen according to claim 1, characterized in that, The setting angle of the air nozzle (4-2) is as follows: the air nozzle (4-2) is set at an angle, and the outlet end of the air nozzle (4-2) is located directly above its corresponding circular roller.

5. The automatic cleaning device for a roller screen according to claim 1, characterized in that, The walking assembly (4-4) includes a lower clamping block (4-4-1), an upper clamping block (4-4-2), a movable plate (4-4-3), and two rows of L-shaped chain bends (4-4-7); among which, The lower clamping block (4-4-1) and the upper clamping block (4-4-2) are two rectangular blocks stacked together. The top surface of the lower clamping block (4-4-1) has two semi-circular through slots symmetrically opened, and the bottom surface of the upper clamping block (4-4-2) has two semi-circular through slots symmetrically opened, so that two cylindrical through holes are formed at the junction of the stacked lower clamping block (4-4-1) and upper clamping block (4-4-2); a rectangular through slot is opened on the top surface of the upper clamping block (4-4-2) along the axial direction of the cylindrical through hole. The movable plate (4-4-3) is a rectangular plate stacked on the upper clamping block (4-4-2). Its bottom surface extends downward from the center to form a rectangular protrusion that can be embedded in a rectangular through groove. The width of the rectangular through groove is slightly larger than the width of the rectangular protrusion. The movable plate (4-4-3) is stacked on the upper clamping block (4-4-2) with its rectangular protrusion embedded in the rectangular through groove on the top surface of the upper clamping block (4-4-2). Two rows of L-shaped chain bending plates (4-4-7) are symmetrically arranged along the length direction and spaced apart on the top surface of the movable plate (4-4-3). The bottom plates of the two are fixed on the movable plate (4-4-3), and the vertical plates of the two are clamped and fixed on both sides of the chain (2-5). The lower clamping block (4-4-1), the upper clamping block (4-4-2), and the movable plate (4-4-3) are connected and fixed as a whole in sequence.

6. The automatic cleaning device for a roller screen according to claim 5, characterized in that, The lower clamping block (4-4-1), the upper clamping block (4-4-2), and the movable plate (4-4-3) are connected and fixed as a whole from bottom to top by four connecting screws (4-4-5) set at the four corners of the three and matching nuts set at the ends of each connecting screw. Each connecting screw (4-4-5) has a matching hexagonal slotted nut 4-4-4 threaded to its end. Each connecting screw (4-4-5) has a pin hole at its tail end, in which a cotter pin (4-4-6) is detachably installed.

7. The automatic cleaning device for a roller screen according to claim 1, characterized in that, It also includes a PLC controller installed in the field electrical cabinet and a host computer installed in the remote control center; wherein, the PLC controller is electrically connected to the geared motor (2-2) to control the rotation speed and rotation direction of the output shaft of the geared motor (2-2) through the PLC controller; the PLC controller is electrically connected to a first photoelectric conversion device, and the host computer is electrically connected to a second photoelectric conversion device, and the first photoelectric conversion device and the second photoelectric conversion device are connected by optical fiber.

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