A self-cleaning device for an oily sludge scraper conveyor

Abstract

This invention relates to the field of oily sludge treatment technology, specifically to a self-cleaning device for an oily sludge scraper conveyor. Addressing the problem of oily sludge easily bridging and clogging within the treatment chamber and being discharged in clumps and pulses, this invention comprises an oily sludge treatment chamber, an arch-breaking and conditioning component, a sludge homogenization and discharge component, a mechanical linkage component, and a sludge bypass and pressure relief structure. The arch-breaking and conditioning component includes a oscillating comb-tooth arch-breaking plate, a bidirectional cutting blade, and fixed sludge-cutting bars. The sludge homogenization and discharge component includes opposing active toothed rollers, driven toothed rollers, and a sludge guide plate. The mechanical linkage component drives the oscillating comb-tooth arch-breaking plate and the active toothed rollers, causing the oily sludge stripped from the scraper's return side to be sequentially subjected to arch-breaking cutting, kneading homogenization, and back pressure slow-release discharge; thereby reducing the possibility of oily sludge clogging and the impact of pulsed sludge discharge on downstream systems.

Description

Technical Field

[0001] This invention relates to the field of oily sludge treatment technology, specifically to a self-cleaning device for an oily sludge scraper conveyor. Background Technology

[0002] In the harmless and resource-based treatment of environmental solid waste, high-temperature drying or co-incineration of oily sludge (such as refining sludge and tank bottom sludge) is a common process. In such treatment lines, scraper conveyors not only perform displacement functions but also have a significant impact on the continuous and stable feeding of downstream drying or incineration systems. Existing scraper conveyors rely on chains and scrapers within a closed trough to propel the sludge forward. However, oily sludge has strong adhesion and high thixotropy. When conveyed to the head sprocket discharge port, in some cases of highly viscous oily sludge, gravity unloading may not be sufficient to completely overcome the adhesion force, causing the sludge to adhere to the back of the scraper and the chain gaps, tumbling into the lower return trough and forming a "return carryover" phenomenon. To address this problem, existing technologies add spring-loaded scrapers to the return section below the discharge port and work in conjunction with a sludge collection hopper for residual sludge collection and return.

[0003] However, the aforementioned cleaning structure revealed serious flaws in actual oil sludge conditions. First, the sludge is compressed in the main conveying section, and the residual sludge forcibly scraped off by the scraper is in the form of high-density solid sludge lumps. These dense sludge lumps with extremely strong cohesion fall into the sludge collection chamber of the funnel. The large sludge lumps are easily squeezed and supported by each other, and by the sludge against the constricted sidewalls. This results in suspended accumulation or bridging in the upper part of the sludge collection chamber, where some sludge supports each other and is difficult to continue to be discharged downwards. Once suspended accumulation forms, the sludge discharge channel below is blocked, and the remaining sludge can only accumulate upwards in the chamber. Ultimately, this not only causes secondary blockage at the discharge end but also floods and jams the upper cleaning scraper assembly. Secondly, the scraping action is severely disconnected from the downstream sludge collection and discharge actions. The sludge collection chamber lacks a mechanical linkage structure capable of instantly breaking up and cutting off large, suspended sludge lumps, and also lacks a sludge discharge mechanism to re-compress and knead dense sludge lumps into a uniform, fine stream. This means that when these high-viscosity, large sludge lumps occasionally collapse or are discharged through ordinary valves, they may intermittently enter the downstream feed network in clumps. This, in turn, affects the feeding stability of the downstream drying or incineration systems, increasing the risk of localized operational fluctuations or unstable combustion.

[0004] To address this, a self-cleaning device for an oily sludge scraper conveyor is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a self-cleaning device for an oily sludge scraper conveyor, solving the problems of existing scraper conveyors where material easily adheres to the return side of the scraper blades when conveying oily sludge. This results in the high-viscosity oily sludge easily forming suspended bridges and clogging in the sludge collection chamber, and the residual sludge easily entering downstream pipelines in large pulses, affecting the stable operation of subsequent drying or incineration systems. By installing a central arch-breaking and conditioning component, a lower sludge homogenization and discharge component, a mechanical linkage component, and a sludge bypass and pressure relief structure within the oily sludge treatment chamber, the oily sludge stripped from the return side of the scraper blades undergoes sequential processes of introduction, arch breaking, shearing, kneading, homogenization, slow-release discharge, and abnormal bypass pressure relief, thereby reducing the possibility of bridging and clogging of oily sludge within the treatment chamber and its pulse discharge in large clumps.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A self-cleaning device for an oily sludge scraper conveyor is characterized by comprising an oily sludge treatment chamber, an arch-breaking and conditioning component, a sludge homogenization and discharge component, and a mechanical linkage component. The oily sludge treatment chamber receives residual oily sludge on the return side of the scraper and has an upper sludge inlet conditioning zone and a lower homogenization and discharge zone. The arch-breaking and conditioning component is located between the upper sludge inlet conditioning zone and the lower homogenization and discharge zone and includes a swing comb-tooth arch-breaking plate, a bidirectional cutting blade, and fixed sludge intercepting bars. The sludge homogenization and discharge component is located in the lower homogenization and discharge zone and includes an opposing active toothed roller, a driven toothed roller, and a sludge guide plate, with a back pressure discharge gap formed between the sludge guide plate and the two toothed rollers. The mechanical linkage component synchronously draws power from the return sprocket shaft and drives the swing comb-tooth arch-breaking plate and the active toothed roller, so that the residual sludge is sequentially discharged through arch-breaking cutting, toothed roller kneading, and back pressure slow release.

[0007] This invention uses an oily sludge treatment chamber as the receiving and processing space for scraped oily sludge. An arch-breaking and conditioning component is installed in the middle, and a sludge homogenization and discharge component is installed at the bottom. This prevents the oily sludge stripped from the return side of the scraper from falling directly into the discharge channel by gravity. Instead, it is first broken, cut, and chopped by a reciprocating arch-breaking mechanism using a oscillating comb-toothed arch-breaking plate, bidirectional cutting blades, and fixed sludge-cutting grids. Then, the active and driven toothed rollers roll against each other to knead, squeeze, and refine the sludge. Finally, it is homogenized and slowly discharged through the back pressure discharge gap between the sludge guide plate and the two toothed rollers. A mechanical linkage component transmits the power of the scraper conveyor to the oscillating comb-toothed arch-breaking plate and the active toothed rollers, allowing the arch-breaking and conditioning actions and the homogenization and discharge actions to be synchronized with the scraper conveyor, reducing the possibility of the scraped oily sludge accumulating statically in the treatment chamber for extended periods.

[0008] Preferably, the oily sludge treatment chamber includes a vertical anti-accumulation front wall, a directional sludge guide side plate, an upper sludge inlet conditioning zone, and a lower homogenization and discharge zone. The directional sludge guide side plate extends obliquely toward the lower homogenization and discharge zone to guide the residual oily sludge on the return side of the scraper into the arch-breaking conditioning component and the lower homogenization and discharge zone. The upper sludge inlet conditioning zone is used to receive, buffer, and regulate the flow direction of the oily sludge initially entering the chamber, so that it is treated by the arch-breaking conditioning component before entering the lower homogenization and discharge zone. The vertical anti-accumulation front wall helps to reduce the possibility of oily sludge compacting along the inclined wall and forming a stable support layer.

[0009] Preferably, the arch-breaking and conditioning component further includes an external rocker arm spindle and a rocker arm lever arm. The oscillating comb-tooth arch-breaking plate is fixed to the external rocker arm spindle, and multiple bidirectional cutting blades are spaced apart along the lower edge of the oscillating comb-tooth arch-breaking plate. The fixed sludge intercepting grid is located below the oscillating comb-tooth arch-breaking plate and forms a shearing gap with the bidirectional cutting blades. After receiving the reciprocating driving force transmitted by the mechanical linkage component, the rocker arm lever arm drives the external rocker arm spindle to rotate reciprocally, causing the oscillating comb-tooth arch-breaking plate to oscillate reciprocally within the oily sludge treatment chamber. The bidirectional cutting blades move with the oscillating comb-tooth arch-breaking plate and form a dynamic and static shearing engagement with the fixed sludge intercepting grid, thereby cutting, breaking up, and dispersing the falling oily sludge clumps.

[0010] Preferably, the bidirectional cutting blade is rhomboid in shape, with a forward cutting head and a backward cutting head formed at both ends along the length of the scraper conveyor, respectively, to cut into the oily sludge clumps in both directions of the reciprocating oscillation of the oscillating comb-tooth arch-breaking plate. With this structure, when the oscillating comb-tooth arch-breaking plate oscillates in one direction, the forward cutting head can cut into the oily sludge clumps; when it oscillates in the opposite direction, the backward cutting head can cut into the oily sludge clumps, ensuring that the bidirectional cutting blade participates in cutting in both strokes of the reciprocating motion, reducing the situation where the sludge is merely pushed without cutting during the reverse oscillation.

[0011] Preferably, the mechanical linkage assembly includes a first sprocket, an overload protector, a second sprocket, and a linkage intermediate shaft. The first sprocket is connected to the return sprocket shaft of the scraper conveyor via the overload protector. The second sprocket is circumferentially fixed to the linkage intermediate shaft. The first sprocket is connected to the second sprocket via a chain. The linkage intermediate shaft is arranged along the width direction of the scraper conveyor. The overload protector is used to cause relative slippage between the first sprocket and the return sprocket shaft when the load torque of the mechanical linkage assembly exceeds a preset torque. Thus, the return sprocket shaft can provide power to the arch-breaking and conditioning assembly and the sludge homogenization and discharge assembly via the first sprocket, the second sprocket, and the linkage intermediate shaft. When the downstream components experience excessive resistance due to sludge jamming, the overload protector causes slippage between the first sprocket and the return sprocket shaft, limiting the continued transmission of excessive torque and protecting the chain, gears, linkage intermediate shaft, drive roller, and driven roller.

[0012] Preferably, an eccentric crank is fixedly mounted on the linkage intermediate shaft. One end of the eccentric crank is hinged to a transmission connecting rod, and the other end of the transmission connecting rod is hinged to a rocker arm lever arm. The rocker arm lever arm is fixed to an external rocker arm main shaft to drive the oscillating comb-tooth arch-breaking plate to reciprocate and break up the oily sludge clumps. When the linkage intermediate shaft rotates, the eccentric crank converts the continuous rotary motion into the reciprocating push-pull motion of the transmission connecting rod. The transmission connecting rod then drives the rocker arm lever arm, the external rocker arm main shaft, and the oscillating comb-tooth arch-breaking plate to reciprocate, thereby causing the oscillating comb-tooth arch-breaking plate to repeatedly disturb and break up the oily sludge clumps.

[0013] Preferably, a sprocket three is fixedly mounted on the axial end of the intermediate shaft away from sprocket one, and a sprocket four is fixedly mounted on the extended shaft end of the drive toothed roller. Sprocket three is connected to sprocket four via a chain. A drive gear is fixedly mounted on the shaft end of the drive toothed roller near sprocket four, and a driven gear is fixedly mounted on the extended shaft of the driven toothed roller. The drive gear and driven gear mesh externally. The intermediate shaft transmits power to the drive toothed roller through sprockets three and four. The drive toothed roller then drives the driven toothed roller to rotate in the opposite direction through the external meshing of the drive gear and driven gear, thereby causing the drive toothed roller and driven toothed roller to roll in opposite directions.

[0014] Preferably, both the active and driven toothed rollers are provided with twisting teeth on their outer peripheral surfaces. The twisting teeth on the active and driven toothed rollers are arranged axially offset, and the opposing rolling sides of the active and driven toothed rollers are located above the sludge guide plate. The two opposing toothed rollers bite, clamp, twist, and squeeze the oily sludge through the twisting teeth. The axially offset twisting teeth can form a staggered kneading action, reducing the possibility of jamming caused by direct tooth tip contact, and further dispersing, refining, and homogenizing the oily sludge clumps after arch breaking.

[0015] Preferably, the sludge guide plate is provided with multiple large circular holes, the minimum flow width of which is greater than the preset maximum allowable solid particle size in the oily sludge. A continuous sludge discharge channel is connected below the sludge guide plate. The back pressure sludge discharge gap formed between the sludge guide plate and the two toothed rollers is used to impede, spread, and guide the kneaded oily sludge, allowing it to be discharged in a more continuous state and reducing the possibility of large, unkneaded sludge lumps collapsing directly. The large circular holes allow the homogenized oily sludge to flow through, and the larger flow width reduces the possibility of particles getting stuck or bridging at the orifice openings. The continuous sludge discharge channel receives the oily sludge diverted through the large circular holes and discharges it outwards.

[0016] Preferably, it also includes a sludge bypass pressure relief structure, which includes a bypass overflow port opened in the vertical anti-accumulation front wall and a gravity bypass overflow gate covering the bypass overflow port. The gravity bypass overflow gate includes a sealing door plate, a counterweight rod and a counterweight block. The upper edge of the sealing door plate is hinged to the upper side of the bypass overflow port. The counterweight rod is fixed to the lower outer part of the sealing door plate and extends outward and downward. The counterweight block is adjustablely sleeved on the counterweight rod. During normal operation, the counterweight blocks press the sealing door closed by the counterweight rod. When the sludge discharge is obstructed in the lower homogenization sludge discharge area, sludge guide plate, or continuous sludge discharge channel, causing oily sludge to back-pile in the oily sludge treatment chamber to the vicinity of the bypass overflow port, the back-pile sludge exerts an outward pushing force on the sealing door. When the pushing force exceeds the closing torque formed by the counterweight blocks, the sealing door flips open, allowing the back-pile sludge to be discharged and depressurized through the bypass overflow port.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention uses an oily sludge treatment chamber to receive the oily sludge stripped from the return side of the scraper. Inside the oily sludge treatment chamber, an arch-breaking and conditioning component and a sludge homogenization and discharge component are sequentially installed. The scraped oily sludge is first subjected to reciprocating arch breaking, cutting and cutting by a swing comb-tooth arch-breaking plate, a bidirectional cutting blade and a fixed sludge intercepting grid. Then, it is kneaded, squeezed and refined by an active toothed roller and a driven toothed roller, thereby reducing the possibility of high-viscosity oily sludge bridging, clogging and falling in whole pieces inside the chamber.

[0018] 2. This invention transmits the power of the scraper conveyor's return sprocket shaft to the oscillating comb-tooth arch-breaking plate and the drive toothed roller through a mechanical linkage component. This allows the arch-breaking and conditioning actions and the homogenizing and sludge discharge actions to run synchronously with the scraper conveyor, reducing the possibility of scraped oily sludge accumulating in the oily sludge treatment chamber. At the same time, the overload protector can cause relative slippage between the sprocket and the return sprocket shaft when the load torque exceeds the preset torque, thereby limiting the continued transmission of excessive torque. This helps reduce the risk of damage to components such as chains, gears, linkage intermediate shafts, drive toothed rollers, and driven toothed rollers under jamming conditions.

[0019] 3. This invention forms a back pressure sludge discharge gap between the sludge guide plate and the active and driven toothed rollers, and sets multiple large round holes on the sludge guide plate to further homogenize, divert, and slowly release the kneaded oily sludge before discharge, reducing the impact of pulsed sludge discharge on the downstream drying or incineration system; when the lower sludge discharge is obstructed and the sludge is back-piled to the vicinity of the bypass overflow port, the gravity bypass overflow gate can be opened under the action of sludge side pressure, allowing the back-piled sludge to be discharged through the bypass overflow port, thereby reducing the possibility that the back-piled sludge will continue to rise and submerge the scraper, chain, and cleaning mechanism. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the scraper conveyor and oily sludge treatment chamber of the present invention; Figure 2 For the present invention Figure 1 Sectional view of AA; Figure 3 This is a schematic diagram of the overall structure of the oily sludge treatment chamber of the present invention; Figure 4 This is a schematic diagram of the arch-breaking and heat-conditioning component structure of the present invention; Figure 5 This is a schematic diagram of the structure of the arch-breaking and conditioning component and the sludge homogenization and discharge component of the present invention. Figure 6 This is a schematic diagram of the sprocket and overload protector structure of the present invention; Figure 7 This is a schematic diagram of the gravity bypass overflow gate structure of the present invention.

[0021] In the diagram: 1. Scraper conveyor; 101. Return sprocket shaft; 102. Sludge scraper; 2. Oily sludge treatment chamber; 201. Vertical anti-accumulation front wall; 202. Directional sludge guiding side plate; 203. Upper sludge inlet conditioning zone; 204. Lower homogenization and sludge discharge zone; 205. Bypass overflow port; 301. Sprocket one; 302. Overload protector; 303. Linkage intermediate shaft; 304. Eccentric crank; 305. Transmission connecting rod; 306. Drive gear; 307. Driven gear; 308. Sprocket two; 30 9. Sprocket 3; 310. Sprocket 4; 4. Arch-breaking and conditioning component; 401. External rocker arm spindle; 402. Swinging comb-tooth arch-breaking plate; 403. Bidirectional cutting blade; 404. Fixed sludge intercepting grid bar; 405. Rocker arm lever; 5. Sludge homogenization and discharge component; 501. Active toothed roller; 502. Driven toothed roller; 503. Twisting teeth; 504. Sludge guide plate; 505. Continuous sludge discharge channel; 6. Gravity bypass overflow gate; 601. Sealing gate plate; 602. Counterweight bar; 603. Counterweight block. Detailed Implementation

[0022] Please see Figures 1 to 7 This invention provides a self-cleaning device for an oily sludge scraper conveyor, the technical solution of which is as follows: A self-cleaning device for an oily sludge scraper conveyor, characterized in that it includes an oily sludge treatment chamber 2, an arch-breaking and conditioning component 4, a sludge homogenization and discharge component 5, and a mechanical linkage component; the oily sludge treatment chamber 2 receives residual oily sludge on the return side of the scraper 102 and has an upper sludge inlet conditioning zone 203 and a lower homogenization and discharge zone 204; the arch-breaking and conditioning component 4 is located between the upper sludge inlet conditioning zone 203 and the lower homogenization and discharge zone 204, and includes a swing comb-tooth arch-breaking plate 402 and a bidirectional... The sludge is cutter 403 and fixed sludge interception grid 404; the sludge homogenization and discharge assembly 5 is located in the lower homogenization and discharge zone 204, including an active toothed roller 501, a driven toothed roller 502 and a sludge guide plate 504 that roll in opposite directions, and a back pressure discharge gap is formed between the sludge guide plate 504 and the two toothed rollers; the mechanical linkage assembly takes force synchronously from the return sprocket shaft 101 and drives the swing comb-tooth arch-breaking plate 402 and the active toothed roller 501, so that the residual sludge is discharged sequentially through arch-breaking cutting, toothed roller kneading and back pressure slow release.

[0023] Specifically, this device is located near the return side of the scraper conveyor's discharge end. The oily sludge treatment chamber 2 is used to receive the oily sludge peeled off from the return side of the scraper blade 102 and provides processing space for the breaking of arches, shearing and dispersing, and homogenization of the oily sludge before discharge. The scraped-off oily sludge can be oily sludge that falls off under gravity after the scraper blade 102 flips to the return side, or it can be oily sludge peeled off by a conventional scraper assembly located on the return side of the scraper conveyor. The scraper assembly can adopt existing structures such as scrapers, blades, brushes, or elastic clamping scrapers; its specific structure is not the focus of improvement in this invention.

[0024] The arch-breaking and conditioning component 4 is located in the middle of the oily sludge treatment chamber 2, and the sludge homogenization and discharge component 5 is located in the lower part of the oily sludge treatment chamber 2. This allows the oily sludge to undergo the middle arch-breaking and conditioning and the lower homogenization and discharge treatment sequentially after entering the oily sludge treatment chamber 2, instead of directly entering the discharge channel in large pieces.

[0025] The arch-breaking and conditioning component 4 includes a oscillating comb-tooth arch-breaking plate 402, a bidirectional cutting blade 403, and a fixed sludge-blocking grid 404. The oscillating comb-tooth arch-breaking plate 402 oscillates back and forth under the drive of the mechanical linkage component, which drives the bidirectional cutting blade 403 to cut into and disturb the oily sludge clumps; the fixed sludge-blocking grid 404 cooperates with the bidirectional cutting blade 403 to shear, cut, and disperse the oily sludge clumps, thereby reducing the possibility of the oily sludge bridging in the tank or falling in whole pieces.

[0026] The sludge homogenization and discharge assembly 5 includes an active toothed roller 501, a driven toothed roller 502, and a sludge guide plate 504 that roll in opposite directions. The active toothed roller 501 is driven by a mechanical linkage assembly, which in turn drives the driven toothed roller 502 to roll in opposite directions, kneading, squeezing, and refining the oily sludge after it has been broken up. A back pressure sludge discharge gap is formed between the sludge guide plate 504 and the two toothed rollers, which further homogenizes and slowly releases the oily sludge before discharge, thereby discharging it in a more continuous sludge flow.

[0027] As one embodiment of the present invention, refer to Figure 3 and Figure 5 The oily sludge treatment chamber 2 includes a vertical anti-accumulation front wall 201, a directional sludge guide side plate 202, an upper sludge inlet conditioning zone 203, and a lower homogenization and discharge zone 204. The directional sludge guide side plate 202 extends obliquely toward the lower homogenization and discharge zone 204 to guide the residual oily sludge on the return side of the scraper 102 into the arch-breaking conditioning component 4 and the lower homogenization and discharge zone 204.

[0028] Specifically, the directional sludge guide side plate 202 extends obliquely towards the lower homogenizing sludge discharge area 204, used to guide the oily sludge stripped from the return side of the scraper 102 into the oily sludge treatment chamber 2, and to concentrate the oily sludge towards the area where the arch-breaking conditioning component 4 is located. The vertical anti-accumulation front wall 201 is used to define one side boundary of the oily sludge treatment chamber 2, reducing the possibility of high-viscosity oily sludge forming stable oblique supports and suspended accumulation along the chamber wall.

[0029] The upper sludge inlet conditioning zone 203 is located at the top of the oily sludge treatment chamber 2. It receives, buffers, and conditions the initial oily sludge falling into the chamber, ensuring it passes through the arch-breaking conditioning component 4 before entering the lower homogenizing and discharging zone 204. The arch-breaking conditioning component 4 is located between the upper sludge inlet conditioning zone 203 and the lower homogenizing and discharging zone 204. It is used to break, cut, and shear the oily sludge clumps moving from top to bottom. The lower homogenizing and discharging zone 204 is located below the arch-breaking conditioning component 4. The sludge homogenizing and discharging component 5 is installed within the lower homogenizing and discharging zone 204. It receives the oily sludge after arch-breaking conditioning and then kneads, homogenizes, and discharges it.

[0030] As one embodiment of the present invention, refer to Figure 2 and Figure 4 The arch-breaking and conditioning component 4 also includes an external rocker arm spindle 401 and a rocker arm lever 405. The swing comb-tooth arch-breaking plate 402 is fixed to the external rocker arm spindle 401. Multiple bidirectional cutting blades 403 are spaced along the lower edge of the swing comb-tooth arch-breaking plate 402. The fixed mud-cutting grid bar 404 is located below the swing comb-tooth arch-breaking plate 402 and forms a shearing gap with the bidirectional cutting blades 403.

[0031] Specifically, the external rocker arm spindle 401 is rotatably positioned in the middle of the oily sludge treatment chamber 2. The swing comb-tooth arch-breaking plate 402 is fixed to the external rocker arm spindle 401, and the rocker arm lever 405 is fixed to the external rocker arm spindle 401 and is used to receive the reciprocating driving force transmitted by the mechanical linkage assembly. During operation, the rocker arm lever 405 drives the external rocker arm spindle 401 to rotate reciprocally, thereby causing the swing comb-tooth arch-breaking plate 402 to perform reciprocating oscillating motion within the oily sludge treatment chamber 2.

[0032] Multiple bidirectional cutting blades 403 are spaced apart along the lower edge of the oscillating comb-tooth arch-breaking plate 402, and can oscillate synchronously with the oscillating comb-tooth arch-breaking plate 402. Fixed sludge intercepting bars 404 are located below the oscillating comb-tooth arch-breaking plate 402, forming a shearing gap with the bidirectional cutting blades 403. When the oily sludge clumps move downward from the upper sludge conditioning zone 203 to the vicinity of this shearing gap, the bidirectional cutting blades 403 cut into the oily sludge clumps, and the fixed sludge intercepting bars 404 block and support the oily sludge clumps, so that the oily sludge clumps are sheared, cut off and dispersed between the moving blades and the fixed bars, thereby reducing the possibility of oily sludge forming large bridging pieces or collapsing as a whole in the tank.

[0033] As one embodiment of the present invention, refer to Figure 4 The bidirectional cutting blade 403 is rhomboid in shape, and the two ends of the bidirectional cutting blade 403 along the length direction of the scraper conveyor respectively form a forward cutting head and a backward cutting head, so as to cut into the oily sludge clumps in the two directions of the reciprocating swing of the oscillating comb tooth arch-breaking plate 402.

[0034] Specifically, by setting the bidirectional cutting blade 403 to a rhomboid shape, it can continuously cut into the oily sludge clumps during the reciprocating oscillation process. When the forward oscillating comb-tooth arch-breaking plate 402 oscillates in one direction, the forward cutting head can cut into the oily sludge clumps; when the forward oscillating comb-tooth arch-breaking plate 402 oscillates in the opposite direction, the backward cutting head can cut into the oily sludge clumps. Thus, the bidirectional cutting blade 403 can participate in cutting in both directions of the reciprocating oscillation, reducing the situation where the oily sludge is only pushed without cutting during the reverse oscillation. The oily sludge clumps are repeatedly cut and truncated under the combined action of the forward cutting head, the backward cutting head, and the fixed sludge intercepting grid 404, which helps to break up large pieces of bonded oily sludge into smaller clumps, thereby improving the arch-breaking and shearing effect of the arch-breaking and conditioning component 4 on highly viscous oily sludge.

[0035] As one embodiment of the present invention, refer to Figure 3 and Figure 6The mechanical linkage assembly includes a first sprocket 301, an overload protector 302, a second sprocket 308, and a linkage intermediate shaft 303. The first sprocket 301 is connected to the return sprocket shaft 101 of the scraper conveyor via the overload protector 302. The second sprocket 308 is circumferentially fixed to the linkage intermediate shaft 303. The first sprocket 301 is connected to the second sprocket 308 via a chain. The linkage intermediate shaft 303 is arranged along the width direction of the scraper conveyor. The overload protector 302 is used to cause relative slippage between the first sprocket 301 and the return sprocket shaft 101 when the load torque of the mechanical linkage assembly exceeds a preset torque.

[0036] Specifically, the mechanical linkage assembly is used to obtain power from the return sprocket shaft 101 of the scraper conveyor and transmit this power to the subsequent arch breaking and sludge discharge components. Sprocket one 301 is connected to the return sprocket shaft 101 via an overload protector 302, and sprocket two 308 is circumferentially fixed to the linkage intermediate shaft 303. Sprocket one 301 drives sprocket two 308 to rotate via a chain, thereby causing the linkage intermediate shaft 303 to rotate synchronously with the scraper conveyor, and thus transmit power to the arch breaking and conditioning assembly 4 and the sludge homogenization and discharge assembly 5 respectively.

[0037] The overload protector 302 can adopt a friction sliding overload protection structure, which includes a protector inner sleeve circumferentially fixed to the return sprocket shaft 101, friction plates clamped on both sides of the sprocket 301, a preload disc spring for providing axial clamping force to the friction plates, and an adjusting nut for adjusting the compression of the preload disc spring. The sprocket 301 is rotatably sleeved on the outside of the protector inner sleeve. The protector inner sleeve can be circumferentially fixed to the return sprocket shaft 101 by a flat key, spline, or shrink sleeve, so that the protector inner sleeve rotates synchronously when the return sprocket shaft 101 rotates; the sprocket 301 is not directly rigidly fixed to the return sprocket shaft 101, but obtains the torque transmission through the friction plates. The preset torque can be determined based on the working torque required for the mechanical linkage components to normally drive the arch-breaking and conditioning component 4 and the sludge homogenization and discharge component 5, as well as the allowable transmission torque of the chain, linkage intermediate shaft 303, driving toothed roller 501, and driven toothed roller 502. The preset torque is higher than the normal working torque and lower than the limit torque when the above-mentioned transmission components are damaged or jammed. By adjusting the compression of the preload disc spring, the clamping force of the friction plate on the sprocket 301 can be changed, thereby adjusting the slip torque of the overload protector 302.

[0038] During normal operation, the return sprocket shaft 101 drives the inner sleeve of the protector to rotate. The adjusting nut compresses the preloaded disc spring, which presses the friction plate against the side of sprocket 301, generating sufficient frictional torque between the friction plate and sprocket 301. Sprocket 301 rotates synchronously with the return sprocket shaft 101 and drives sprocket 308 and the intermediate shaft 303 to rotate via the chain. When the load torque of the arch-breaking and conditioning component 4, the sludge homogenization and discharge component 5, or subsequent transmission components exceeds the preset torque due to oily sludge clumps or large rigid impurities, the reverse resistance experienced by sprocket 301 is greater than the maximum frictional torque that the friction plate can transmit, causing sprocket 301 to slip relative to the inner sleeve of the protector. At this time, the return sprocket shaft 101 can continue to rotate, and the subsequent transmission components are no longer forcibly dragged, thereby limiting the transmission of excessive torque to the linkage intermediate shaft 303, chain, gear, drive toothed roller 501 and driven toothed roller 502, reducing the risk of damage to transmission components under jamming conditions.

[0039] As one embodiment of the present invention, refer to Figure 4 An eccentric crank 304 is fixedly installed on the linkage intermediate shaft 303. The eccentric crank 304 is hinged to one end of the transmission connecting rod 305. The other end of the transmission connecting rod 305 is hinged to the rocker arm 405. The rocker arm 405 is fixed to the external rocker arm main shaft 401 to drive the swing comb-tooth arch-breaking plate 402 to reciprocate to break up the oily sludge clumps.

[0040] Specifically, an eccentric crank 304 is fixedly mounted on the intermediate linkage shaft 303. The eccentric crank 304 rotates synchronously with the intermediate linkage shaft 303. One end of the eccentric crank 304 is hinged to the transmission connecting rod 305, and the other end of the transmission connecting rod 305 is hinged to the rocker arm lever arm 405. The rocker arm lever arm 405 is fixed to the external rocker arm main shaft 401. When the intermediate linkage shaft 303 rotates, the eccentric crank 304 converts the continuous rotary motion into the reciprocating push-pull motion of the transmission connecting rod 305. The transmission connecting rod 305 then drives the rocker arm lever arm 405 to swing back and forth, thereby driving the external rocker arm main shaft 401 to rotate back and forth.

[0041] Since the oscillating comb-tooth arch-breaking plate 402 is fixed to the external rocker arm main shaft 401, the reciprocating rotation of the external rocker arm main shaft 401 can drive the oscillating comb-tooth arch-breaking plate 402 to oscillate back and forth in the middle of the oily sludge treatment chamber 2. During the oscillation process, the oscillating comb-tooth arch-breaking plate 402 repeatedly disturbs and breaks up the oily sludge clumps entering between the upper sludge conditioning zone 203 and the lower homogenizing sludge discharge zone 204, making it difficult for the oily sludge clumps to form a stable suspended support in the chamber, and creating conditions for the subsequent shearing and cutting by the bidirectional cutting blade 403 and the fixed sludge cutting grid 404.

[0042] As one embodiment of the present invention, refer to Figure 3A sprocket 309 is fixedly installed at the axial end of the intermediate shaft 303 away from the first sprocket 301. A sprocket 4 310 is fixedly installed at the extended shaft end of the drive toothed roller 501. The third sprocket 309 is connected to the fourth sprocket 310 via a chain. A drive gear 306 is fixedly installed at the shaft end of the drive toothed roller 501 near the fourth sprocket 310. A driven gear 307 is fixedly installed on the extended shaft of the driven toothed roller 502. The drive gear 306 and the driven gear 307 are externally meshed.

[0043] Specifically, when the intermediate shaft 303 rotates, sprocket 309 rotates synchronously with the intermediate shaft 303, and drives sprocket 4 310 to rotate via a chain, thereby transmitting power to the drive toothed roller 501, enabling the drive toothed roller 501 to rotate synchronously with the scraper conveyor. When the drive toothed roller 501 rotates, the drive gear 306 rotates synchronously with the drive toothed roller 501, and drives the driven toothed roller 502 to rotate in the opposite direction through external meshing with the driven gear 307, thereby causing the drive toothed roller 501 and the driven toothed roller 502 to form opposing rolling motions. Through this transmission structure, the power of the intermediate shaft 303 can be stably transmitted to the sludge homogenization and discharge assembly 5, allowing the two toothed rollers to clamp, knead, and squeeze the oily sludge entering the lower homogenization and discharge zone 204.

[0044] As one embodiment of the present invention, refer to Figure 2 and Figure 5 The outer peripheral surfaces of the active toothed roller 501 and the driven toothed roller 502 are provided with twisting teeth 503. The twisting teeth 503 on the active toothed roller 501 and the twisting teeth 503 on the driven toothed roller 502 are arranged in an axially staggered manner, and the opposing rolling sides of the active toothed roller 501 and the driven toothed roller 502 are located above the sludge guide plate 504.

[0045] Specifically, when the active toothed roller 501 and the driven toothed roller 502 roll towards each other, the twisting teeth 503 bite, clamp, twist, and squeeze the oily sludge entering between the two rollers, further dispersing and refining the oily sludge clumps after arch breaking and conditioning. The twisting teeth 503 on the active toothed roller 501 and the driven toothed roller 502 are staggered axially, so that the two rollers form an alternating kneading action on the oily sludge during the opposing rolling process, reducing the possibility of jamming caused by the twisting teeth 503 directly facing each other. The opposing rolling sides of the active toothed roller 501 and the driven toothed roller 502 are located above the sludge guide plate 504, allowing the oily sludge, after being kneaded and squeezed by the two rollers, to continue to flow downward into the area above the sludge guide plate 504, and be further homogenized and discharged in the subsequent back pressure sludge discharge gap.

[0046] As one embodiment of the present invention, refer to Figure 2 and Figure 5The sludge guide plate 504 is provided with a plurality of large circular holes, the minimum flow width of which is greater than the preset maximum allowable solid particle size in the oily sludge, and the sludge guide plate 504 is connected to a continuous sludge discharge channel 505 below.

[0047] Specifically, a back-pressure sludge discharge gap is formed between the sludge guide plate 504 and the two toothed rollers, allowing the oily sludge to be spread and diverted before discharge, thus ensuring a more continuous discharge and reducing the possibility of large clumps of oily sludge falling directly. Furthermore, the sludge guide plate 504 is provided with multiple large circular holes for the diversion and passage of the kneaded and homogenized oily sludge. The minimum flow width of these large circular holes is greater than the preset maximum allowable solid particle size in the oily sludge to reduce the possibility of mechanical jamming of solid particles at the orifice opening. The orifice diameter, spacing, number of openings, and opening ratio can be set according to the solid content, fluidity, and discharge volume of the continuous sludge discharge channel 505. In this embodiment, the minimum flow width of the large circular holes is preferably more than twice the preset maximum allowable solid particle size in the oily sludge.

[0048] As one embodiment of the present invention, refer to Figure 1 and Figure 7 It also includes a sludge bypass pressure relief structure, which includes a bypass overflow port 205 opened in the vertical anti-accumulation front wall 201 and a gravity bypass overflow door 6 covering the bypass overflow port 205. The gravity bypass overflow door 6 includes a sealing door plate 601, a counterweight rod 602 and a counterweight block 603. The upper edge of the sealing door plate 601 is hinged to the upper side of the bypass overflow port 205. The counterweight rod 602 is fixed to the lower outer part of the sealing door plate 601 and extends outward and downward. The counterweight block 603 is adjustablely sleeved on the counterweight rod 602.

[0049] Specifically, the counterweight 603's weight on the counterweight rod 602 is adjustable to regulate the closing torque of the gravity bypass overflow door 6. The opening condition for the gravity bypass overflow door 6 is that the opening torque formed by the reaction oily sludge acting on the inner side of the sealing door plate 601 is greater than the closing torque formed by the counterweight 603 through the counterweight rod 602 and the sum of the resistance torque at the hinge of the sealing door plate 601. During normal operation, the sludge level in the oily sludge treatment chamber 2 is lower than the bypass overflow port 205, and the material-side pressure of the oily sludge on the inner side of the sealing door plate 601 is relatively small. Under the action of gravity, the counterweight 603, through the counterweight rod 602, makes the sealing door plate 601 stick tightly to the bypass overflow port 205, thereby keeping the bypass closed. When sludge discharge from the lower homogenization sludge discharge zone 204, sludge guide plate 504, or continuous sludge discharge channel 505 is obstructed, oily sludge gradually back-stackings within the oily sludge treatment chamber 2 and rises to the vicinity of the bypass overflow port 205. The back-stacking sludge exerts an outward pushing force on the sealing door 601. When the opening torque generated by this pushing force is greater than the closing torque generated by the counterweight block 603 through the counterweight pressure rod 602 and the resistance torque at the hinge of the sealing door 601, the sealing door 601 flips open outward, allowing the back-stacking sludge to be discharged through the bypass overflow port 205 to the external emergency collection space. After the sludge level drops, the outward pushing force on the sealing door 601 decreases, and the counterweight block 603, through the counterweight pressure rod 602, causes the sealing door 601 to automatically fall back and cover the bypass overflow port 205, thereby restoring the bypass to the closed state.

[0050] Working principle: During operation, the entire invention relies on the running state of the scraper conveyor for synchronous operation. After the scraper conveyor transports the oily sludge to the unloading end, the scraper blade 102 flips from the working conveying side to the return side. Due to the strong adhesiveness of the oily sludge, some of the oily sludge will adhere to the return side of the scraper blade 102. This part of the oily sludge can be detached or peeled off by the flipping of the scraper blade (102), gravity, or the action of the scraper assembly, and enter the oily sludge treatment chamber (2).

[0051] After entering the oily sludge treatment chamber 2, the oily sludge flows upward to the upper sludge conditioning zone 203 under the guidance of the directional sludge guide side plate 202. The upper sludge conditioning zone 203, in cooperation with the directional sludge guide side plate 202, temporarily receives, buffers, and regulates the flow direction of the scraped oily sludge, thereby creating smoother sludge entry conditions for subsequent arch breaking and homogenization sludge discharge.

[0052] In terms of power transmission, this invention utilizes the return sprocket shaft 101 of the scraper conveyor as the power input. When the return sprocket shaft 101 rotates, it drives sprocket one 301 to rotate via the overload protector 302. Sprocket one 301 then drives sprocket two 308 to rotate via a chain. Since sprocket two 308 is circumferentially fixed to the intermediate linkage shaft 303, the intermediate linkage shaft 303 rotates synchronously when sprocket two 308 rotates. After the intermediate linkage shaft 303 rotates, it drives the eccentric crank 304 to perform circular motion. The eccentric crank 304 is hinged to the transmission connecting rod 305, so the continuous rotation of the eccentric crank 304 is converted into the reciprocating push-pull motion of the transmission connecting rod 305. The other end of the transmission link 305 is hinged to the rocker arm lever 405, which is fixed to the external rocker arm main shaft 401. Therefore, the reciprocating push and pull of the transmission link 305 will cause the rocker arm lever 405 to swing back and forth, thereby driving the external rocker arm main shaft 401 to rotate back and forth. The swing comb-tooth arch-breaking plate 402 is fixed on the external rocker arm main shaft 401. Therefore, the reciprocating rotation of the external rocker arm main shaft 401 is ultimately manifested as the swing comb-tooth arch-breaking plate 402 making a reciprocating oscillating motion in the middle of the oily sludge treatment chamber 2.

[0053] As the oily sludge clumps move downwards from the upper sludge conditioning zone 203 to the location of the arch-breaking conditioning component 4, the reciprocating oscillation of the oscillating comb-tooth arch-breaking plate 402 continuously disturbs the oily sludge clumps. Multiple bidirectional cutting blades 403 are arranged at intervals along the lower edge of the oscillating comb-tooth arch-breaking plate 402, and the fixed sludge intercepting grid 404 is located below the bidirectional cutting blades 403, forming a shearing gap between them. After the oily sludge clumps fall into this area, they are subjected to the oscillating impact and agitation of the oscillating comb-tooth arch-breaking plate 402 on the one hand, and the dynamic and static shearing action between the bidirectional cutting blades 403 and the fixed sludge intercepting grid 404 on the other hand. In this way, large pieces of oily sludge that would otherwise easily form a suspended bridging structure will be cut in, cut off, and broken up, thereby reducing the possibility of them forming a suspended accumulation layer in the middle of the oily sludge treatment chamber 2.

[0054] After being broken up and conditioned, the oily sludge continues to flow downwards into the lower homogenization and sludge discharge zone 204. At this point, another power output path of the linkage intermediate shaft 303 begins to function. A sprocket 309 is fixed to the axial end of the linkage intermediate shaft 303 away from sprocket 1 301. Sprocket 309 drives sprocket 4 310 to rotate via a chain. Sprocket 4 310 is fixed to the extended shaft end of the drive toothed roller 501, so the drive toothed roller 501 rotates accordingly when sprocket 4 310 rotates. A drive gear 306 is also fixed to the shaft end of the drive toothed roller 501. The drive gear 306 meshes externally with the driven gear 307, which is fixed to the extended shaft of the driven toothed roller 502. Therefore, when the drive toothed roller 501 rotates, it drives the driven toothed roller 502 to rotate in the opposite direction via the drive gear 306 and the driven gear 307, thus causing the drive toothed roller 501 and the driven toothed roller 502 to roll in opposite directions.

[0055] When the active toothed roller 501 and the driven toothed roller 502 roll toward each other, the kneading teeth 503 located on their outer circumferences clamp, knead, and squeeze the oily sludge entering the lower homogenization and sludge discharge zone 204. Because the kneading teeth 503 on the active toothed roller 501 and the driven toothed roller 502 are staggered axially, the two sets of kneading teeth 503 do not form a simple face-to-face confrontation, but rather exert an alternating kneading and dispersing effect on the oily sludge. After this process, the oily sludge clumps that were cut and truncated in the previous stage are further crushed, broken up, and homogenized, gradually transforming them from a dense, blocky state into a sludge flow state that is easier to discharge continuously.

[0056] A sludge guide plate 504 is provided below the opposing rolling sides of the driving toothed roller 501 and the driven toothed roller 502, forming a back pressure sludge discharge gap between the sludge guide plate 504 and the two toothed rollers. The oily sludge treated by the twisting teeth 503 does not collapse directly and unrestrained; instead, it first enters this back pressure sludge discharge gap. Under the combined action of continuous squeezing by the two toothed rollers and the flow obstruction by the sludge guide plate 504, a certain back pressure is formed. This back pressure helps the oily sludge continue to be squeezed, spread, and homogenized before discharge, thereby reducing the possibility of large sludge clumps falling directly into the downstream sludge discharge channel without treatment.

[0057] The sludge guide plate 504 is provided with multiple large circular holes. Under the action of back pressure, the oily sludge is diverted through these large circular holes and then enters the continuous sludge discharge channel 505 below the sludge guide plate 504, and is discharged outward from the continuous sludge discharge channel 505. Through the kneading of the two toothed rollers, the slow release of sludge in the back pressure discharge gap, and the diversion of the large circular holes, the oily sludge can be transformed from a large piece state that may intermittently collapse into a more continuous and uniform discharge state.

[0058] Under normal operating conditions, the sludge level in the oily sludge treatment chamber 2 is lower than the bypass overflow port 205, or the material-side pressure formed by the oily sludge on the inner side of the sealing door plate 601 is relatively small. At this time, the counterweight block 603 generates a closing torque on the sealing door plate 601 through the counterweight pressure rod 602 under the action of gravity, so that the sealing door plate 601 is tightly attached to and covers the outside of the bypass overflow port 205, thereby keeping the bypass overflow port 205 closed, and the oily sludge is preferentially discharged through the sludge homogenization discharge component 5 and the continuous sludge discharge channel 505.

[0059] When in an abnormal state, such as when the lower double-toothed roller is jammed, the orifice plate is blocked, or the sludge discharge channel is blocked, the sludge in the oily sludge treatment chamber 2 cannot be discharged downwards in time, and the sludge level in the chamber will gradually rise. When the oily sludge from the reactor rises to the vicinity of the bypass overflow port 205 and exerts an outward pushing force on the inner side of the sealing door 601, the opening torque generated by this pushing force is greater than the closing torque generated by the counterweight block 603 through the counterweight pressure rod 602. The sealing door 601 then flips outwards around its upper edge hinge position, allowing the reactor sludge to be discharged through the bypass overflow port 205 to the external emergency collection space. After depressurization and sludge discharge, the sludge level in the oily sludge treatment chamber 2 drops, the outward pushing force on the sealing door 601 decreases, and the counterweight block 603 again generates a closing torque through the counterweight pressure rod 602, causing the sealing door 601 to automatically fall back and re-cover the bypass overflow port 205. Therefore, the gravity bypass overflow gate 6 can be closed by counterweight under normal conditions and opened by sludge side pressure under blocked reversed reactor conditions, thereby reducing the possibility that the reversed reactor sludge will continue to rise and submerge the upper scraper 102, chain and cleaning mechanism.

[0060] Therefore, the working principle of this invention is not simply to collect and discharge the scraped sludge, but to incorporate the oily sludge stripped from the return side of the scraper conveyor into a continuous processing procedure: the oily sludge is first directed into the oily sludge treatment chamber 2, and then reciprocated through arch breaking, bidirectional cutting, and shearing by the oscillating comb-tooth arch-breaking plate 402, bidirectional cutting blade 403, and fixed sludge intercepting grid 404. Subsequently, it enters the space between the active toothed roller 501 and the driven toothed roller 502 for kneading, squeezing, and refining. Finally, it forms a relatively continuous and homogenized sludge flow through the sludge guide plate 504, the back pressure sludge discharge gap, and the continuous sludge discharge channel 505. Under normal operating conditions, this process can reduce the possibility of oily sludge bridging and pulsating discharge in the chamber; under abnormal blockage or back pressure rise conditions, the gravity bypass overflow valve 6 can release pressure through the bypass overflow port 205, thereby reducing the risk of oily sludge back accumulation and affecting the operation of the scraper conveyor.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning device for an oily sludge scraper conveyor, characterized in that, The system includes an oily sludge treatment chamber (2), an arch-breaking and conditioning component (4), a sludge homogenization and discharge component (5), and a mechanical linkage component. The oily sludge treatment chamber (2) receives residual oily sludge on the return side of the scraper (102) and has an upper sludge inlet conditioning zone (203) and a lower homogenization and discharge zone (204). The arch-breaking and conditioning component (4) is located between the upper sludge inlet conditioning zone (203) and the lower homogenization and discharge zone (204) and includes a swing comb-tooth arch-breaking plate (402), a bidirectional cutting blade (403), and a fixed... Sludge interception grid (404); sludge homogenization and discharge assembly (5) is located in the lower homogenization and discharge zone (204), including an active toothed roller (501), a driven toothed roller (502) and a sludge guide plate (504) that roll in opposite directions, and a back pressure discharge gap is formed between the sludge guide plate (504) and the two toothed rollers; the mechanical linkage assembly takes force synchronously from the return sprocket shaft (101) and drives the swing comb-tooth arch-breaking plate (402) and the active toothed roller (501) so that the residual sludge is discharged sequentially through arch-breaking cutting, toothed roller kneading and back pressure slow release.

2. The self-cleaning device for an oily sludge scraper conveyor according to claim 1, characterized in that, The oily sludge treatment chamber (2) includes a vertical anti-accumulation front wall (201), a directional sludge guide side plate (202), an upper sludge inlet conditioning zone (203), and a lower homogenization and discharge zone (204). The directional sludge guide side plate (202) extends obliquely toward the lower homogenization and discharge zone (204) to guide the residual oily sludge on the return side of the scraper (102) into the arch-breaking conditioning component (4) and the lower homogenization and discharge zone (204).

3. The self-cleaning device for an oily sludge scraper conveyor according to claim 1, characterized in that, The arch-breaking and conditioning component (4) also includes an external rocker arm spindle (401) and a rocker arm lever (405). The swing comb-tooth arch-breaking plate (402) is fixed to the external rocker arm spindle (401). Multiple bidirectional cutting blades (403) are spaced along the lower edge of the swing comb-tooth arch-breaking plate (402). The fixed mud-cutting grid bar (404) is located below the swing comb-tooth arch-breaking plate (402) and forms a shearing gap with the bidirectional cutting blades (403).

4. The self-cleaning device for an oily sludge scraper conveyor according to claim 3, characterized in that, The bidirectional cutting blade (403) is rhomboid in shape. The two ends of the bidirectional cutting blade (403) along the length direction of the scraper conveyor form a forward cutting head and a backward cutting head, respectively, so as to cut into the oily sludge clumps in the two directions of the reciprocating swing of the oscillating comb tooth arch-breaking plate (402).

5. The self-cleaning device for an oily sludge scraper conveyor according to claim 1, characterized in that, The mechanical linkage assembly includes a first sprocket (301), an overload protector (302), a second sprocket (308), and a linkage intermediate shaft (303). The first sprocket (301) is connected to the return sprocket shaft (101) of the scraper conveyor via the overload protector (302). The second sprocket (308) is circumferentially fixed to the linkage intermediate shaft (303). The first sprocket (301) is connected to the second sprocket (308) via a chain. The linkage intermediate shaft (303) is arranged along the width direction of the scraper conveyor. The overload protector (302) is used to cause relative slippage between the first sprocket (301) and the return sprocket shaft (101) when the load torque of the mechanical linkage assembly exceeds a preset torque.

6. The self-cleaning device for an oily sludge scraper conveyor according to claim 5, characterized in that, An eccentric crank (304) is fixedly installed on the linkage intermediate shaft (303). One end of the eccentric crank (304) is hinged to the transmission connecting rod (305), and the other end of the transmission connecting rod (305) is hinged to the rocker arm (405). The rocker arm (405) is fixed to the external rocker arm main shaft (401) to drive the swing comb-tooth arch-breaking plate (402) to reciprocate to break up the oily sludge clumps.

7. The self-cleaning device for an oily sludge scraper conveyor according to claim 6, characterized in that, A sprocket three (309) is fixedly installed at the axial end of the linkage intermediate shaft (303) away from the sprocket one (301). A sprocket four (310) is fixedly installed at the extended shaft end of the drive toothed roller (501). The sprocket three (309) is connected to the sprocket four (310) via a chain. A drive gear (306) is fixedly installed at the shaft end of the drive toothed roller (501) near the sprocket four (310). A driven gear (307) is fixedly installed on the extended shaft of the driven toothed roller (502). The drive gear (306) and the driven gear (307) mesh externally.

8. The self-cleaning device for an oily sludge scraper conveyor according to claim 7, characterized in that, The outer peripheral surfaces of both the active toothed roller (501) and the driven toothed roller (502) are provided with twisting teeth (503). The twisting teeth (503) on the active toothed roller (501) and the twisting teeth (503) on the driven toothed roller (502) are arranged axially offset, and the opposing rolling sides of the active toothed roller (501) and the driven toothed roller (502) are located above the sludge guide plate (504).

9. A self-cleaning device for an oily sludge scraper conveyor according to claim 8, characterized in that, The sludge guide plate (504) is provided with a plurality of large circular holes, the minimum flow width of which is greater than the preset maximum allowable solid particle size in the oily sludge, and the bottom of the sludge guide plate (504) is connected to a continuous sludge discharge channel (505).

10. A self-cleaning device for an oily sludge scraper conveyor according to claim 2, characterized in that, It also includes a sludge bypass pressure relief structure, which includes a bypass overflow port (205) opened in the vertical anti-accumulation front wall (201) and a gravity bypass overflow door (6) covering the bypass overflow port (205). The gravity bypass overflow door (6) includes a sealing door plate (601), a counterweight rod (602) and a counterweight block (603). The upper edge of the sealing door plate (601) is hinged to the upper side of the bypass overflow port (205). The counterweight rod (602) is fixed to the lower outer part of the sealing door plate (601) and extends outward and downward. The counterweight block (603) is adjustablely sleeved on the counterweight rod (602).

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