Non-Metallic Chain-and-Flight Sludge Collector Equipped with Buoyancy-Enhanced Flights

Abstract

The present invention relates to a non-metallic chain flight type sludge collector equipped with a flight having buoyancy, wherein the cross-sectional shape of the flight is improved to prevent sludge from overflowing and backflowing while improving structural rigidity, the buoyancy of the flight is improved by forming the reinforcing protrusion as a hollow structure and inserting a buoyancy material inside to reduce friction between the shoe and the rail, thereby reducing the operating load, wear is minimized and maintainability is improved through the return shoe and bottom shoe structures, and the bearings supporting the drive shaft and the driven shaft are configured as an self-aligning oil-less structure to correct shaft eccentricity and tilting, thereby enabling stable operation for a long period of time. The present invention for achieving the above objective comprises a sludge collector comprising a driving sprocket shaft assembly and a plurality of driven sprocket shaft assemblies installed spaced apart from each other in a sedimentation tank, a chain wound in an endless track form on the driving sprocket shaft assembly and the driven sprocket shaft assembly, a plurality of flights installed at predetermined intervals on the chain to collect sludge, and a driving unit for driving the driving sprocket shaft assembly, wherein the flights comprise: a central plate for collecting sludge; a backflow prevention ridge formed to protrude forward from the upper part of the central plate to suppress backflow of sludge; an upper horizontal plate horizontally extended rearward from the upper part of the central plate to improve structural rigidity; a vertical plate vertically extended downward from the extended end of the horizontal plate; a lower horizontal plate horizontally extended rearward from the lower part of the central plate to improve structural rigidity; and a lower extension plate formed to extend downward from the lower part of the central plate to collect sludge. The technical gist of the invention is that it comprises: a reinforcing protrusion formed to protrude convexly toward the rear from the center of the central plate, with the interior formed to be hollow along the longitudinal direction of the flight; a buoyancy material installed to be inserted into the hollow of the reinforcing protrusion to enhance the buoyancy of the flight; and a pair of end caps fitted to both ends of the hollow in the longitudinal direction to seal the hollow.

Description

Technology Field

[0001] The present invention relates to a non-metallic flight-type sludge collector equipped with a flight having buoyancy, and more specifically, to a non-metallic flight-type sludge collector equipped with a flight having buoyancy that can operate smoothly even under high-load sludge conditions by improving the rotary drive method and mechanical structure, minimize wear on major components, and improve energy efficiency. Background Technology

[0002] Generally, water purification plants, sewage treatment plants, wastewater treatment plants, etc., are equipped with sludge collectors that scrape and collect sludge settled at the bottom of the sedimentation tank and discharge it to the outside, and remove scum from the top with a skimmer.

[0003] A conventional non-metallic flight-type sludge collector comprises a plurality of shafts installed to be arranged in a spaced interval designed for a sedimentation tank, a plurality of sprockets installed on the shafts, a chain connected to the sprockets and installed to have an endless track shape and moved by the rotation of the sprockets, and a plurality of flights installed to be fixed to the chain to scrape and transport the sludge settled in the sedimentation tank.

[0004] In addition, the non-metallic chain-flight type sludge collector is a device that operates continuously 24 hours a day, 365 days a year in the sedimentation tank, and is operated for a long time.

[0005] In addition, as the viscosity of solids increases and the amount of chemicals used increases due to changes in the surrounding environment, the sludge load increases, and continuous wear occurs due to friction in the rotating parts caused by the sludge load and the weight of the device, thereby reducing the service life of the parts.

[0006] As wear occurs in this way, friction increases and the operating load rises, leading to reduced energy efficiency and increased operating costs.

[0007] In addition, the flight moves by sliding along the rail through the shoe, and during this process, the shoe rubbing against the rail wears out rapidly due to the weight of the chain and the flight.

[0008] The rapid wear of the shoes equipped on the flights, which leads to flight wear, is causing serious maintenance problems as the upper part of sedimentation tanks is being covered due to the increasing number of underground wastewater treatment plants. This is because replacing the shoes in enclosed spaces is difficult for safety management purposes, resulting in the flights being damaged by wear. Prior art literature

[0009] Registered Patent No. 10-2190000 Registered Patent No. 10-2036270 The problem to be solved

[0010] The objective of the present invention to solve the above-mentioned problems is to provide a non-metallic chain flight type sludge collector equipped with a flight having buoyancy that enables long-term stable operation by improving the cross-sectional shape of the flight to prevent sludge from overflowing and backflowing while improving structural rigidity, forming the reinforcing protrusion as a hollow structure and inserting a buoyancy material inside to improve the buoyancy of the flight, thereby reducing friction between the shoe and the rail and reducing the operating load, minimizing wear and improving maintainability through the return shoe and bottom shoe structures, and configuring the bearings supporting the drive shaft and driven shaft as an self-aligning oil-less structure to correct shaft eccentricity and tilting. means of solving the problem

[0011] The present invention, which performs the task of achieving the above-mentioned purpose and eliminating conventional defects, comprises a drive sprocket shaft assembly and a plurality of driven sprocket shaft assemblies installed spaced apart from each other in a sedimentation tank, a chain wound in an endless track form on the drive sprocket shaft assembly and the driven sprocket shaft assembly, a plurality of flights installed at predetermined intervals on the chain to collect sludge, and a drive unit for driving the drive sprocket shaft assembly, wherein the flights comprise: a central plate for collecting sludge; a backflow prevention ridge formed to protrude forward from the upper part of the central plate to suppress backflow of sludge; an upper horizontal plate horizontally extended rearward from the upper part of the central plate to improve structural rigidity; a vertical plate vertically extended downward from the extended end of the upper horizontal plate; a lower horizontal plate horizontally extended rearward from the lower end of the central plate to improve structural rigidity; and a lower extension plate formed to extend downward from the lower end of the central plate to collect sludge. The invention is characterized by comprising: a reinforcing protrusion formed to protrude convexly toward the rear from the center of the central plate, with the interior formed to be hollow along the longitudinal direction of the flight; a buoyancy material installed to be inserted into the hollow of the reinforcing protrusion to enhance the buoyancy of the flight; and a pair of end caps fitted to both ends of the hollow in the longitudinal direction to seal the hollow.

[0012] In addition, the buoyancy material is characterized by being composed of a plurality of protrusions formed to protrude along the circumference of both ends, thereby allowing the buoyancy material to be fitted into the hollow in a press-fit manner, so as to be firmly fitted into the hollow.

[0013] In addition, the above-described end cap is characterized by comprising: a fitting part that is fitted into the interior of the hollow; a end part formed larger than the diameter of the fitting part and hooked onto the end of the hollow; and a projection formed protruding along the circumference of the fitting part to ensure that the fitting part is firmly fitted into the interior of the hollow.

[0014] In addition, the flight is characterized by comprising: a plurality of return shoes installed spaced apart along the longitudinal direction of the flight on the upper part of the flight; a return shoe wear prevention plate installed interposed between the return shoes and the flight; a plurality of bottom shoes installed spaced apart along the longitudinal direction of the flight on the lower part of the flight; and a bottom shoe wear prevention plate installed interposed between the bottom shoes and the flight.

[0015] In addition, the driven sprocket shaft assembly is configured to include a corner driven sprocket shaft assembly installed around the bottom of a sedimentation tank so as to be positioned below the driving sprocket shaft assembly while having a position parallel to the driving sprocket shaft assembly, and the head shaft constituting the driving sprocket shaft assembly and the corner shaft constituting the corner driven sprocket shaft are installed to be supported by bearings installed on both side walls of the sedimentation tank, and the bearing comprises: a base plate fixedly installed on the side wall of the sedimentation tank; a housing coupled to the base plate; a bush disposed inside the housing, having an inner surface formed in a cylindrical shape into which the head or corner shaft is inserted; a ball hub disposed inside the housing, formed to accommodate the bush inside, and having an outer surface formed in a spherical shape; and a bush casing disposed between the housing and the ball hub, having a spherical receiving surface formed to contact the spherical outer surface of the ball hub. It includes a fixing bolt that is inserted through a through hole formed on the side of the housing and the ball hub and fastened to the ball hub to pressurize and fix the bush; and is characterized in that the spherical outer surface of the ball hub contacts the spherical receiving surface of the bush casing to allow relative angular displacement, thereby enabling automatic alignment even if the axis of the head or corner shaft is eccentric or tilted.

[0016] In addition, the housing is characterized by including a fixed housing integrally fixed to the base plate; and a detachable housing detachably coupled to the fixed housing by a fastening member. Effects of the invention

[0017] As described above, according to the present invention, by forming a hollow in the reinforcing protrusion of the flight and inserting a buoyancy material inside, the self-weight of the flight is reduced and the buoyancy in water is increased. Accordingly, the tension acting on the chain is reduced, thereby decreasing the load on the drive unit, reducing power consumption, and reducing wear on the chain and sprocket, resulting in the effect of reducing maintenance costs.

[0018] In addition, since the buoyancy material is coupled to the hollow interior in a press-fit manner and both ends are sealed with caps, moisture penetration is prevented and a decrease in buoyancy is prevented even during long-term operation, thereby maintaining a stable operating state.

[0019] In addition, return shoes and bottom shoes are installed at the upper and lower parts of the flight, respectively, and a wear-prevention plate is interposed between them. This reduces wear caused by direct contact with the walls and bottom of the sedimentation tank, and facilitates easy replacement of parts, thereby improving maintainability.

[0020] In addition, the bearing structure supporting the shaft is formed with a spherical contact structure of the bush, ball hub, and bush casing, so it automatically aligns even if shaft eccentricity or tilting occurs; this prevents uneven chain wear and reduces the risk of sprocket derailment. Consequently, it enables stable operation over a long period.

[0021] In addition, since the housing is composed of a fixed housing integrally fixed to the base plate and a detachable housing, the bearing can be maintained after separating the detachable housing from the fixed housing, thereby reducing maintenance time and improving workability; this is a very useful invention. Brief explanation of the drawing

[0022] FIG. 1 is a structural diagram of a non-metallic chain-flight type sludge collector according to the present invention. FIG. 2 is a front view showing the installation of the drive unit according to the present invention and the installation state of the drive sprocket shaft assembly and the corner driven sprocket assembly. FIG. 3 is a front view showing the idler driven sprocket assembly according to the present invention installed in a sedimentation tank. FIG. 4 is a front view showing the state in which a tail driven sprocket assembly according to the present invention is installed in a sedimentation tank. FIG. 5 is a perspective view showing a flight according to the present invention from one side. FIG. 6 is a perspective view showing a flight according to the present invention from the other side. FIG. 7 is an exploded perspective view showing a flight according to the present invention. FIG. 8 is a side view showing the state in which a shoe and a wear-prevention plate are installed on a flight according to the present invention. FIG. 9 is a perspective view showing a bearing according to the present invention, FIG. 10 is an exploded perspective view showing a bearing according to the present invention, FIG. 11 is a cross-sectional view showing a bearing according to the present invention. Specific details for implementing the invention

[0023] The configuration and operation of an embodiment of the present invention will be described in detail below in conjunction with the attached drawings. Furthermore, in describing the present invention, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the essence of the present invention, such detailed description is omitted.

[0024] FIG. 1 is a structural diagram of a non-metallic chain-flight type sludge collector according to the present invention; FIG. 2 is a front view showing the installation of a drive unit and the installation state of a drive sprocket shaft assembly and a corner driven sprocket assembly according to the present invention; FIG. 3 is a front view showing the state in which an idler driven sprocket assembly according to the present invention is installed in a sedimentation tank; FIG. 4 is a front view showing the state in which a tail driven sprocket assembly according to the present invention is installed in a sedimentation tank; FIG. 5 is a perspective view showing a flight according to the present invention from one side; FIG. 6 is a perspective view showing a flight according to the present invention from the other side; FIG. 7 is an exploded perspective view showing a flight according to the present invention; FIG. 8 is a side view showing the state in which a shoe and a wear-prevention plate are installed on a flight according to the present invention.

[0025] As shown in the drawing, the present invention comprises a driving sprocket shaft assembly (100) and a plurality of driven sprocket shaft assemblies (200) installed spaced apart from each other in a sedimentation tank (10), a chain (300) wound in an endless track shape on the driving sprocket shaft assembly (100) and the driven sprocket shaft assembly (200), and a plurality of flights (400) installed at predetermined intervals on the chain (300) to collect sludge. The driving sprocket shaft assembly (100) is driven by a driving unit (700), and accordingly, the chain (300) moves in a circular motion, and the flights (400) coupled to the chain (300) move along the bottom of the sedimentation tank (10) to collect and transport sludge.

[0026] The above drive sprocket shaft assembly (100) comprises a head shaft (110) installed in a sedimentation tank (10) to rotate by power transmitted from a drive unit (700), two head sprockets (120) installed on the head shaft (110) to rotate together with the head shaft (110) and having a structure spaced apart from each other, on which the chain (300) is wound, and bearings (130) installed at both ends of the head shaft (110) and fixed to the sedimentation tank (10) to support the head shaft (110).

[0027] The above-mentioned driven sprocket shaft assembly (200) comprises a corner driven sprocket shaft assembly (210), an idler driven sprocket shaft assembly (220), and a tail driven sprocket shaft assembly (230).

[0028] The above corner driven sprocket shaft assembly (210) comprises a corner shaft (211) installed around the bottom of the sedimentation tank (10) so as to be positioned below the driving sprocket shaft assembly (100) in a position parallel to the driving sprocket shaft assembly (100), two sprockets (212) installed on the corner shaft (211) to rotate together with the corner shaft (211) and having a structure spaced apart from each other so as to be wound around the chain (300), and bearings (213) installed at both ends of the corner shaft (211) and fixed to the sedimentation tank (10) to support the corner shaft (211).

[0029] The above idler driven sprocket shaft assembly (220) is configured to include an idler shaft (221) that is fixedly installed in a sedimentation tank (10) so as to be positioned at a distance from the drive sprocket shaft assembly (100) behind the drive sprocket shaft assembly (100) and having a position parallel to the drive sprocket shaft assembly (100), and two sprockets (222) that are installed on the idler shaft (221) to rotate together with the idler shaft (221) and are installed on the idler shaft (221) so as to have a structure spaced apart from each other, and on which the chain (300) is wound.

[0030] The above-mentioned tail driven sprocket shaft assembly (230) comprises a tail shaft (231) installed around the bottom of the sedimentation tank (10) so as to be positioned below the idle driven sprocket shaft assembly (220) and spaced apart from the idle driven sprocket shaft assembly (220) and a tail shaft (232) installed on the tail shaft (231) to rotate together with the tail shaft (231), and installed on the tail shaft (231) so as to have a structure spaced apart from each other, and on which the chain (300) is wound.

[0031] The sprockets (222, 232) installed on the idler shaft (221) and tail shaft (231) are coupled to the idler shaft (221) and tail shaft (231) via sleeves (223, 233) and configured to rotate around the sleeves (223, 233).

[0032] The above flight (400) is formed in a bar shape and installed so that both sides are supported by a pair of left and right chains (300), and a number of them are installed at regular intervals on the chains (300) and rotate to collect sludge from the bottom of the sedimentation tank (10) and collect scum from the top and push it out in one direction.

[0033] A flight (400) configured in this manner comprises a central plate (410) for collecting sludge, a backflow prevention ridge (420) formed to protrude forward from the upper part of the central plate (410) to suppress backflow of sludge, an upper horizontal plate (430) horizontally extended rearward from the upper part of the central plate (410) to improve structural rigidity, a vertical plate (440) vertically extended downward from the extended end of the upper horizontal plate (430), a lower horizontal plate (450) horizontally extended rearward from the lower end of the central plate (410) to improve structural rigidity, a lower extension plate (460) formed to extend downward from the lower end of the central plate (410) to collect sludge, and a plate formed to protrude convexly rearward from the center of the central plate (410) along the longitudinal direction of the flight (400). It comprises a reinforcing protrusion (470) formed so as to have a hollow interior (471), a buoyancy material (480) installed to be inserted into the hollow interior (471) of the reinforcing protrusion (470) to improve the buoyancy of the flight (400), and a pair of end caps (490) fitted to both ends in the longitudinal direction of the hollow interior (471) to seal the hollow interior (471).

[0034] Additionally, the flight (400) comprises a plurality of return shoes (500) installed at the upper part of the flight (400) so as to be spaced apart in the longitudinal direction of the flight (400) and frictionally with the rail, a return shoe wear prevention plate (510) installed to be interposed between the return shoes (500) and the flight (400), a plurality of bottom shoes (600) installed at the lower part of the flight (400) so as to be spaced apart in the longitudinal direction of the flight (400) and frictionally with the rail, and a bottom shoe wear prevention plate (610) installed to be interposed between the bottom shoes (600) and the flight (400).

[0035] The sprockets (222, 232) installed on the idler shaft (221) and tail shaft (231) are coupled to the idler shaft (221) and tail shaft (231) via sleeves (223, 233) and configured to rotate around the sleeves (223, 233).

[0036] The above flight (400) is formed in a bar shape and installed so that both sides are supported by a pair of left and right chains (300), and a number of them are installed at regular intervals on the chains (300) and rotate to collect sludge from the bottom of the sedimentation tank (10) and collect scum from the top and push it out in one direction.

[0037] A flight (400) configured in this manner comprises a central plate (410) for collecting sludge, a backflow prevention ridge (420) formed to protrude forward from the upper part of the central plate (410) to suppress backflow of sludge, an upper horizontal plate (430) horizontally extended rearward from the upper part of the central plate (410) to improve structural rigidity, a vertical plate (440) vertically extended downward from the extended end of the upper horizontal plate (430), a lower horizontal plate (450) horizontally extended rearward from the lower end of the central plate (410) to improve structural rigidity, a lower extension plate (460) formed to extend downward from the lower end of the central plate (410) to collect sludge, and a plate formed to protrude convexly rearward from the center of the central plate (410) along the longitudinal direction of the flight (400). It comprises a reinforcing protrusion (470) formed so as to have a hollow interior (471), a buoyancy material (480) installed to be inserted into the hollow interior (471) of the reinforcing protrusion (470) to improve the buoyancy of the flight (400), and a pair of end caps (490) fitted to both ends in the longitudinal direction of the hollow interior (471) to seal the hollow interior (471).

[0038] Additionally, the flight (400) comprises a plurality of return shoes (500) installed at the upper part of the flight (400) so as to be spaced apart in the longitudinal direction of the flight (400) and frictionally with the rail, a return shoe wear prevention plate (510) installed to be interposed between the return shoes (500) and the flight (400), a plurality of bottom shoes (600) installed at the lower part of the flight (400) so as to be spaced apart in the longitudinal direction of the flight (400) and frictionally with the rail, and a bottom shoe wear prevention plate (610) installed to be interposed between the bottom shoes (600) and the flight (400).

[0039] FIG. 9 is a perspective view showing a bearing according to the present invention, FIG. 10 is an exploded perspective view showing a bearing according to the present invention, and FIG. 11 is a cross-sectional view showing a bearing according to the present invention. A bearing (130, 213) installed in a sedimentation tank (10) while supporting both ends of the head shaft (110) and the corner shaft (211) comprises a base plate (131, 214) fixedly installed on the side wall of the sedimentation tank (10), a housing (132, 214) coupled to the base plate (131, 214), a bush (133, 216) disposed inside the housing (132, 214) with an inner surface formed in a cylindrical shape into which the shaft (110, 211) is inserted, and an outer surface disposed inside the housing (132, 214) and formed to accommodate the bush (133, 216) inside and having The apparatus comprises a ball hub (134, 217) formed in a spherical shape (134a, 217a), a bushing casing (135, 218) disposed between the housing (132, 214) and the ball hub (134, 217) and having a spherical receiving surface (135a, 218a) formed therein that contacts the spherical outer surface (134a, 217a) of the ball hub (134, 217), and a fixing bolt (136, 219) inserted through a through hole formed on the side of the housing (132, 214) and the ball hub (134, 217) and fastened to the ball hub (134, 217) to pressurize and fix a bush (133, 216), wherein the spherical outer surface (134a, 217a) of the ball hub (134, 217) It is configured to automatically align the shaft (110, 211) even if the axis is eccentric or tilted by allowing relative angular displacement through contact with the spherical receiving surface (135a, 218a) of the bush casing (135, 218).

[0040] The above base plate (131, 214) has a plurality of installation holes formed therein and is fixedly installed through a fixing member installed in the sedimentation tank (10) through the installation holes.

[0041] The above housing (132, 214) is configured to include a fixed housing (132a, 215a) integrally fixed to the base plate (131, 214) and a detachable housing (132b, 215b) detachably coupled to the fixed housing (132a, 215a) by a fastening member.

[0042] In this way, by configuring the housing (132, 214) by dividing it into a fixed housing (132a, 215a) and a separated housing (132b, 215b), maintenance of the bearing (130, 213) is made easier.

[0043] The above bush (133, 216) is installed so that a head shaft (110) or a corner shaft (211) is inserted inside, and supports the ends of the head shaft (110) and the corner shaft (211) in a rotatable structure.

[0044] The outer surface of the ball hub (134, 217) is formed in a spherical shape (134a, 217a), and the bushing casing (135, 218) has a spherical receiving surface (135a, 218a) that contacts the spherical outer surface (134a, 217a) of the ball hub (134, 217), thereby automatically correcting axial eccentricity and tilting and forming an oil-less structure.

[0045] Accordingly, when operating the long span chain (300), the shaft alignment error is absorbed, uneven wear of the bearings (130, 213) is prevented, and safe operation for a long period is possible.

[0046] The present invention, configured as described above, forms a hollow (471) in the reinforcing protrusion (470) of the flight (400) and inserts a buoyancy material (480) with a closed-cell structure inside, thereby reducing the self-weight of the flight (400) and increasing the buoyancy in water. Accordingly, the tension acting on the chain (300) is reduced, thereby reducing the load on the drive unit (700), reducing power consumption, and reducing wear on the chain (300) and sprockets (120, 212, 222, 232), thereby reducing maintenance costs.

[0047] In addition, the buoyancy material (480) is coupled to the hollow (471) in a press-fit manner and both ends are sealed with end caps (490), thereby preventing moisture penetration and preventing a decrease in buoyancy even during long-term operation, so that a stable operating state is maintained.

[0048] In addition, a return shoe (500) and a bottom shoe (600) are installed on the upper and lower parts of the flight (400), respectively, and a return shoe wear prevention plate (510) and a bottom shoe wear prevention plate (610) are interposed between them, thereby reducing wear caused by direct contact with the wall and bottom of the sedimentation tank (10) and making it easier to replace parts, thereby improving maintainability.

[0049] In addition, the bearing (130, 213) structure supporting the shaft is formed with a spherical contact structure of a bush (133, 216), a ball hub (134, 217), and a bush casing (135, 218), so that it is automatically aligned even if eccentricity or tilting of the shaft occurs, thus preventing uneven wear of the chain (300) and reducing the risk of the sprocket (120, 212, 222, 232) coming off. Accordingly, stable operation for a long period is possible.

[0050] In addition, the housing (132, 214) is composed of a fixed housing (132a, 215a) that is integrally fixed to the base plate (131, 214) and a detachable housing (132b, 215b), so that the bearing (130, 213) can be maintained after separating the detachable housing (132b, 215b) from the fixed housing (132a, 215a), thereby reducing maintenance time and improving workability.

[0051] The present invention is not limited to the specific preferred embodiments described above, and anyone with ordinary knowledge in the art to which the invention pertains can make various modifications without departing from the essence of the invention as claimed in the claims, and such modifications will be within the scope of the claims. Explanation of the symbols

[0052] (100) : Drive sprocket shaft assembly (110) : Head shaft (120) : Sprocket (130) : Bearing (131) : Baseplate (132) : Housing (132a) : Fixed housing (132b) : Separable housing (133) : Bush (134) : Ball Hub (134a) : Spherical surface (135) : Bush casing (135a) : Spherical receiving surface (136) : Fixing bolt (200): Driven sprocket shaft assembly (210): Corner driven sprocket shaft assembly (211) : Corner shaft (212) : Sprocket (213) : Bearing (214) : Baseplate (214) : Housing (215a) : Fixed housing (215b) : Separation housing (216) : Bush (217) : Ball hub (217a) : Spherical surface (218) : Bush casing (218a) : Spherical receiving surface (219) : Fixing bolt (220) : Idler driven sprocket shaft assembly (221) : Idler shaft (222) : Sprocket (223) : Sleeve (230) : Tail driven sprocket shaft assembly (231) : Tailshaft (232) : Sprocket (233) : Sleeve (300) : Chain (400) : Flight (410) : Center plate (420) : Backflow prevention barrier (430) : Upper horizontal plate (440) : Vertical plate (450) : Lower horizontal plate; (460) : Lower extension plate (470) : Reinforcement protrusion (471) : Hollow (480) : Buoyancy material (481) : Protrusion (490) : End cap (491) : Insert part (492) : Finish part (493) : Protrusion (500) : Return shoe (510) : Return shoe wear protection plate (600) : Bottom shoe (610) : Bottom shoe wear protection plate (700) : Drive unit

Claims

Claim 1 A sludge collector comprising a drive sprocket shaft assembly and a plurality of driven sprocket shaft assemblies installed spaced apart from each other in a sedimentation tank, a chain wound in an endless track form on the drive sprocket shaft assembly and the driven sprocket shaft assembly, a plurality of flights installed at predetermined intervals on the chain to collect sludge, and a drive unit for driving the drive sprocket shaft assembly, wherein the flights comprise: a central plate for collecting sludge; a backflow prevention ridge formed to protrude forward from the upper part of the central plate to suppress backflow of sludge; an upper horizontal plate horizontally extended rearward from the upper part of the central plate to improve structural rigidity; a vertical plate vertically extended downward from the extended end of the upper horizontal plate; a lower horizontal plate horizontally extended rearward from the lower part of the central plate to improve structural rigidity; a lower extension plate formed to extend downward from the lower part of the central plate to collect sludge; and a flight formed to protrude convexly towards the rear from the center of the central plate, along the longitudinal direction of the flight A non-metallic chain flight type sludge collector equipped with a flight having buoyancy, comprising: a reinforcing protrusion formed to have a hollow interior; a buoyancy material installed to be inserted into the hollow interior of the reinforcing protrusion to improve the buoyancy of the flight; and a pair of end caps fitted to both ends in the longitudinal direction of the hollow to seal the hollow; wherein the buoyancy material is formed to protrude along the circumference of both ends and comprises a plurality of protrusions that allow the buoyancy material to be fitted into the hollow in a press-fit manner, thereby ensuring a firm fit within the hollow. Claim 2 delete Claim 3 A non-metallic chain flight type sludge collector having a flight having buoyancy, characterized in that, in claim 1, the end cap comprises: a fitting part that is fitted into the interior of the hollow; a finishing part formed larger than the diameter of the fitting part and hooked onto the end of the hollow; and a projection formed protruding along the circumference of the fitting part to ensure that the fitting part is firmly fitted into the interior of the hollow. Claim 4 A non-metallic chain flight type sludge collector having a flight having buoyancy, characterized in that, in claim 1, the flight comprises: a plurality of return shoes installed spaced apart in the longitudinal direction of the flight on the upper part of the flight; a return shoe wear prevention plate installed interposed between the return shoes and the flight; a plurality of bottom shoes installed spaced apart in the longitudinal direction of the flight on the lower part of the flight; and a bottom shoe wear prevention plate installed interposed between the bottom shoes and the flight. Claim 5 In claim 1, the driven sprocket shaft assembly comprises a corner driven sprocket shaft assembly installed around the bottom of a sedimentation tank so as to be positioned below the driving sprocket shaft assembly in a position parallel to the driving sprocket shaft assembly, and the head shaft constituting the driving sprocket shaft assembly and the corner shaft constituting the corner driven sprocket shaft are installed to be supported by bearings installed on both side walls of the sedimentation tank, and the bearing comprises: a base plate fixedly installed on the side wall of the sedimentation tank; a housing coupled to the base plate; a bush disposed inside the housing, having an inner surface formed in a cylindrical shape into which the head or corner shaft is inserted; a ball hub disposed inside the housing, formed to accommodate the bush inside, and having an outer surface formed in a spherical shape; and a bush casing disposed between the housing and the ball hub, having a spherical receiving surface formed to contact the spherical outer surface of the ball hub. A non-metallic chain flight type sludge collector equipped with a flight having buoyancy, characterized by comprising: a fixing bolt inserted through a through hole formed on the side of the housing and the ball hub and fastened to the ball hub to pressurize and fix the bush; wherein the spherical outer surface of the ball hub contacts the spherical receiving surface of the bush casing to allow relative angular displacement, thereby enabling automatic alignment even if the axis of the head or corner shaft is eccentric or tilted. Claim 6 A non-metallic chain flight type sludge collector having a flight having buoyancy, characterized in that, in claim 5, the housing comprises a fixed housing integrally fixedly formed on the base plate; and a detachable housing detachably coupled to the fixed housing by a fastening member.

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