CN214436764U

CN214436764U - Turnover-plate type single-rail mud scraper

Info

Publication number: CN214436764U
Application number: CN202021910850.2U
Authority: CN
Inventors: 黄桂华; 程鉴昌; 黄渤; 周汉荣
Original assignee: Guangdong Xinhuan Environmental Industry Group Co ltd
Current assignee: Guangdong Shouhui Lantian Engineering Technology Co ltd; Guangdong Xinhuan Environmental Industry Group Co ltd
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2021-10-22
Anticipated expiration: 2030-09-04

Abstract

A panel turnover type monorail mud scraper comprises a driving device, a traction chain, a trolley scraper combination, a direction-changing wheel train, a track assembly and a tensioning device, wherein the driving device is arranged at the top of a water inlet end tank of a sedimentation tank, the direction-changing wheel train is arranged at two ends of the sedimentation tank, the traction chain is sleeved on the driving device and the direction-changing wheel train, the track assembly is arranged at the middle position of the bottom of the sedimentation tank along the length direction of the tank, and the trolley scraper combination is arranged on the track assembly; the tensioning device consists of a manual tensioning device and an automatic tensioning device, and the automatic tensioning device consists of a pendulum bob tensioning device and a large-span suspension structure. The utility model provides a current board-like single track mud scraper turns over can not realize the technological requirement of partial stroke and full stroke combination mud scraping, and switching-over and straining device are complicated and occupy the ground position more, and the installation is complicated with the maintenance, the easy wearing and tearing of chain, the higher problem of complete machine manufacturing cost.

Description

Turnover-plate type single-rail mud scraper

Technical Field

The utility model relates to a water treatment facilities field especially relates to a board-like single track mud scraper turns over.

Background

At present, the working principle of the existing single-rail mud scraper is that under the drive of a driving device, a traction chain and a traction mud scraping trolley intermittently or continuously move back and forth at the bottom of a pool, and mud and sediment at the bottom of the pool are continuously scraped into a mud collecting groove by a mud scraping plate on the mud scraping trolley and then are discharged by a mud discharging pipe. When the mud scraping plate vertically stands and advances towards the mud collecting pit, the process is called a mud scraping process, and when the mud scraping plate horizontally moves towards the opposite direction of the mud collecting pit, the process is called a return process; when the trolley reaches a designated position to complete a mud scraping process, a touch plate on the mud scraping trolley touches a limiting rod extending from the top of the tank to the bottom of the tank, a driving device reverses the return stroke of the trolley, and a horizontal ejector rod fixedly installed at the tank turns a vertical mud scraping plate into a horizontal state approximately parallel to the bottom of the tank in the operation of approaching the limiting rocker before the return stroke of the trolley; when the trolley returns to a designated position to complete a return process, the touch plate on the trolley touches the limiting rod of which the other end extends to the bottom of the tank from the top of the tank, the driving device reverses the trolley to scrape mud, and the horizontal ejector rod fixedly installed at the other end of the tank turns the horizontal mud scraping plate into a vertical state vertical to the bottom of the tank.

However, the monorail mud scraper has the following problems: the fixed ejector rod type plate turnover mechanism leads the mud scraping and the return reversing to reach the preset positions close to the two ends of the tank, so that the mud scraping and the return reversing are required to be full strokes every time. In practice, the number of scraping mud at the near water inlet end is increased, while the number of scraping mud at the near water outlet end is reduced, i.e. a short-distance (non-full stroke) scraping stroke is required to be increased, which cannot be realized.

The conventional automatic tensioning device adopts two sets of inclined slide rail type gravity tensioning rollers for two vertical chains below a driving chain wheel, and two sides of a rope pressing roller are provided with counterweights and are placed on an inclined track; because the stress on the two sides of the rope pressing wheel cannot be completely balanced, the tensioning device is easy to deviate in the running process, so that the clamping affects the tensioning efficiency. The conventional manual tensioning device is arranged at the tail end (far away from the driving end) of the pool, chain tightness adjustment is realized by stretching a bend wheel through a manual hoist, the structure inevitably occupies an installation position at the tail end of the pool, a water collecting tank is usually arranged at the position, and for most projects provided with inclined pipes, the installation of the manual tensioning device is influenced by the water collecting tank and the inclined pipes below the water collecting tank.

The contact type reversing device touches a limit rocker arranged at the pool end through a touch rod on the mud scraping vehicle, and toggles an induction sheet positioned at the top of the pool, so that the proximity switch acts, and a signal is sent to the control box to realize the reversing process. Each mud scraper needs to be matched with two reversing devices, so that two proximity switches and a protective cover need to be arranged, and at least one control cable long in a pond needs to be laid, so that the structure is complex, and faults are easy to generate.

The conventional drive is the form that cycloidal needle speed reducer directly links the sprocket, and its mechanical overload protection only relies on the shear pin to realize, because mud scraping and return stroke are alternation, the shear pin easily produces fatigue fracture because of the alternating stress, leads to the running resistance of misjudgement mud scraper, and this mechanical overload protection adjustability is relatively poor in addition, can't cut off the moment of torsion according to the adjustment of on-the-spot actual conditions.

The upper and lower traction chains of the tank bottom mud scraper which moves back and forth are overlapped and arranged at the position close to the tank bottom and are supported by the groove-shaped support rail. So that the chain repeatedly slides and rubs with the support rail at the position of the bottom of the pool with higher sludge concentration. Increasing the wear of the chain and the carrier rail. Therefore, it is important to invent a slat-type monorail mud scraper which can solve the above-mentioned defects and improve the operation reliability of the equipment.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a board-like single track mud scraper turns over solves current board-like single track mud scraper and can not realize the technological requirement that partial stroke and full stroke combination scraped mud, and switching-over and straining device are complicated and occupy the ground position more, and the installation is complicated with the maintenance, the easy wearing and tearing of chain, the higher problem of complete machine manufacturing cost.

The utility model provides a technical scheme that its technical problem adopted is:

a panel turnover type monorail mud scraper comprises a driving device, a traction chain, a trolley scraper combination, a direction-changing wheel train, a track assembly and a tensioning device, wherein the driving device is arranged at the top of a water inlet end pool of a sedimentation tank, the direction-changing wheel train is arranged at two ends of the sedimentation tank, the traction chain is sleeved on the driving device and the direction-changing wheel train and is connected with the trolley scraper combination, the track assembly is arranged at the middle position of the bottom of the sedimentation tank along the length direction of the sedimentation tank, and the trolley scraper combination is arranged on the track assembly; the tensioning device consists of a manual tensioning device and an automatic tensioning device, and the automatic tensioning device consists of a pendulum tensioning device and a large-span suspension structure;

the driving device comprises a driving seat, bearing seats, a driving shaft, a speed reducer, a chain wheel, a rotary coding counter and a bidirectional overload protection device, wherein the driving seat is fixedly arranged at the top of a water inlet end pool of the sedimentation tank, a pair of bearing seats are fixedly arranged on the driving seat, the driving shaft penetrates through the bearing seats, the chain wheel is sleeved at the position, between the bearing seats, of the driving shaft, a traction chain is sleeved on the chain wheel, a shearing pin is arranged on the chain wheel, the speed reducer is fixedly connected at one end, positioned outside the bearing seats, of the driving shaft, and the rotary coding counter is arranged at the other end of the driving shaft; the rotary coding counter is connected with a Programmable Logic Controller (PLC); the speed reducer is connected with a bidirectional overload protection device and is controlled by a Programmable Logic Controller (PLC);

the redirecting wheel train comprises a first redirecting wheel set and a second redirecting wheel set which are respectively and fixedly arranged at the left end and the right end of the sedimentation tank, and a third redirecting wheel set and a fourth redirecting wheel set which are respectively arranged below the first redirecting wheel set and the second redirecting wheel set, wherein the first redirecting wheel set, the second redirecting wheel set, the third redirecting wheel set and the fourth redirecting wheel set are respectively composed of a redirecting wheel bracket, a bracket shaft sleeve, a redirecting wheel bushing, a redirecting wheel hollow shaft, a long bolt and a nut gasket; the long bolt is sleeved with a redirection wheel hollow shaft, the redirection wheel hollow shaft is sleeved with a redirection wheel bushing, the redirection wheel bushing is sleeved with a redirection wheel and is in interference fit with the redirection wheel bushing, two ends of the redirection wheel hollow shaft are sleeved with support shaft sleeves, and the axial length of the redirection wheel hollow shaft is slightly smaller than the distance between the outer end faces of the two support shaft sleeves; the support shaft sleeve is fixed with the long bolt through a gasket and a nut, the nut is prevented from loosening by a cotter pin, and the support shaft sleeve is welded on the bend wheel support;

the track assembly comprises guide rails, an unlocking ejector rod with an inclined plane is fixedly arranged at one end of each guide rail, which is positioned at the position of the mud pit of the sedimentation tank, and a wear-resistant sliding groove is also arranged between the guide rails;

the trolley scraper combination comprises a trolley frame, wherein a scraper is arranged on the trolley frame, the middle part of the upper end of the scraper is hinged with the trolley frame, an adjustable rubber scraper is fixedly arranged below the scraper, walking wheels in contact with a guide rail surface are arranged at the bottom of the trolley frame, a slide bar pull rod group is also arranged on the trolley frame, a slide bar of the slide bar pull rod group is arranged in two fixed sleeves of the trolley frame, a limiting ring is arranged on the slide bar, two ends of the slide bar are connected with a traction chain, one end of a pull bar of the slide bar pull rod group is hinged with the middle part of the slide bar through a connecting pin, and the other end of the pull bar is hinged with the middle part of the lower end of the scraper; the trolley frame is also provided with a scraper lock; one end of the scraper lock is hinged to the trolley frame, the other end of the scraper lock freely falls on the trolley frame, the head of the free end of the scraper lock is in a right-angle triangle shape with a downward inclined surface, and the scraper lock is positioned above the connecting pin; an unlocking roller is arranged at the upper end of the scraper lock;

the traction chain sequentially passes through the fourth direction-changing wheel set, the second direction-changing wheel set, the first direction-changing wheel set, the driving chain wheel, the third direction-changing wheel set and the front end of the trolley scraper combination from the rear end of the trolley scraper combination to realize closed-loop connection; and the traction chain is supported at the bottom of the part between the front end of the trolley scraper combination and the third direction-changing wheel set and between the rear end of the trolley scraper combination and the fourth direction-changing wheel set by a wear-resistant sliding groove in the track assembly.

Furthermore, the bidirectional overload protection device comprises an inner height-adjustable fixing sleeve, an upper movable sleeve and a lower movable sleeve are arranged in the inner height-adjustable fixing sleeve, compression springs are arranged in the upper movable sleeve and the lower movable sleeve, one end of a lead screw is arranged to penetrate through the compression springs and is fixed on a driving seat, the other end of the lead screw is fixedly connected to a speed reducer lug seat, a sensor fixing seat is fixedly arranged on the lead screw, a normally-open proximity switch is arranged on the sensor fixing seat, and the normally-open proximity switch is connected to a Programmable Logic Controller (PLC); a position-adjustable induction sheet is fixedly arranged on the angle steel of the driving seat relative to the position of the normally open proximity switch; the driving seat is provided with a driving cover for covering the whole driving device.

Furthermore, in order to achieve the purpose of manual tensioning, the manual tensioning device comprises an adjusting screw rod and an adjusting nut which are arranged on the driving seat and used for adjusting the overall height of the driving device, a jack limiting seat is arranged at the bottom of the driving seat, and the jack limiting seat is adapted to a split type manual hydraulic jack used for lifting the height of the driving device.

Further, in order to realize the automatic tensioning of the trolley scraper combination in the return stroke process, the pendulum tensioning device is arranged on a water inlet end wall below the driving device and comprises a fixed seat fixedly arranged on the pool wall, a swing frame is movably connected onto the fixed seat and is connected onto an upright post on the top of the pool through a limiting zipper, a rope pressing wheel used for pressing a traction chain is fixedly arranged at one end of the swing frame, and balance weights are arranged at two ends of the rope pressing wheel.

Further, in order to realize automatic tensioning in the mud scraping process of the trolley scraper combination, the traction chain is of a large-span suspension structure between the first redirection wheel set and the second redirection wheel set.

Furthermore, in order to fix the hollow shaft of the bend wheel and the support shaft sleeves into a stable and reliable whole under the locking force of the long bolt and the nut gasket, the bend wheel and the bend wheel bushing can be mounted on the hollow shaft of the bend wheel to rotate freely, and the axial length of the hollow shaft of the bend wheel is slightly smaller than the distance between the outer end faces of the two support shaft sleeves.

Furthermore, in order to buffer the impact force generated by the over-travel operation of the trolley scraper combination, two ends of the guide rail are provided with buffer rubber heads; in order to facilitate the sealing of the gap between the wear-resistant sliding groove and the two guide rails, guide rail seal plates are further arranged between the guide rails.

Further, in order to enable the scraper to overturn more smoothly, a scraper counterweight is arranged above the scraper, so that any angle is guaranteed, and the moment of the dead weight of the scraper combination to the rotating center is close to 0.

Furthermore, in order to compensate a larger gap between the pool bottom and the scraper caused by civil engineering construction errors, the lower end of the scraper is provided with an adjustable rubber scraper.

Furthermore, in order to better scrape off dirt between the guide rails, a first front inclined scraper blade, a second front inclined scraper blade, a first rear inclined scraper blade and a second rear inclined scraper blade are fixedly arranged at the front and the rear of the four travelling wheels of the trolley frame; the front end and the rear end of the trolley frame are fixedly provided with a front scraper and a rear scraper.

The utility model has the advantages that: the utility model realizes the turnover of the scraper through the traction chain, and simultaneously, the scraper lock is arranged to limit the lifting of the scraper under the action of the sludge resistance, thereby ensuring the reliability of the sludge scraping action; the mud scraper can start to scrape mud by changing the direction of the mud scraper to any position in the return stroke, greatly improves the flexibility of the mud scraper, and is suitable for sedimentation tanks with various mud quantities distributed unevenly; the traction load of the chain is reduced while the mud scraping capacity is increased. The pendulum bob tensioning device is matched with the mode of catenary tensioning, so that the structure of the tensioning device is greatly simplified, the flexible pendulum bob enables automatic tensioning to be stable and reliable, and the manufacturing cost is reduced. The annular metal chain of jack-up that will be closest bottom of the pool silt layer shifts up to be close the clear water district, the chain wearing and tearing reduce, long service life, need not frequently adjust chain length, consequently, save manual overspeed device tensioner, change into drive seat long screw rod height-adjusting replacement, utilize nimble and good and cheap automobile-used manual split type hydraulic jack, can easily jack-up the manual tensioning that the drive seat realized the chain near resultant force central point, one set of jack can be used for many mud scrapers, when having saved the cost greatly, manual overspeed device tensioner's installation space has also been saved. Utilize compression spring cooperation speed reducer to cross the two-way overload protection device that the knuckle arm and proximity switch etc. constitute, not only reliable and stable can adjust the overload moment of torsion in certain extent moreover, be equipped with simultaneously and cut round pin protection and heat and continue the protection, improved the security of equipment greatly. The PLC and the rotary coding counter are adopted to calculate the displacement of the mud scraping vehicle, so that the arrangement of electromechanical sensors arranged at two ends of the pool and extending from the pool bottom to the pool top ground and the laying of cables are reduced. The system can automatically eliminate the parking inertia in the forward and reverse directions of the travelling crane, automatically correct the running error generated by the overturning of the reversing scraper of the mud scraping vehicle caused by the tightness of the chain, and ensure the lasting and stable operation of mud scraping circulation. Move on the lower floor traction chain who goes back and forth the operation with the pond bottom mud scraping car and hang the arrangement directly over the mud scraping car center, keep away from pond bottom silt layer, improved the operational environment of chain, avoided the friction with supporting rail, be favorable to prolonging chain life, the chain that hangs simultaneously plays natural tensioning effect, is favorable to scraping mud car draw gear steady operation, the cost is reduced simultaneously.

The present invention will be described in more detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a structural layout diagram of the plate-turning type single-rail mud scraper in the sedimentation tank.

Fig. 2 is a structural diagram of the driving device of the present invention.

Fig. 3 is a left side view of the middle driving device of the present invention.

Fig. 4 is a top view of the driving device of the present invention.

Fig. 5 is a structural diagram of the bidirectional overload protection device of the present invention.

Fig. 6 is a structural diagram of the pendulum tensioning device of the present invention.

Fig. 7 is a top view of the pendulum tensioning device of the present invention.

Fig. 8 is a structural layout diagram of the redirecting wheel train in the sedimentation tank in the utility model.

Fig. 9 is a cross-sectional view a-a of the redirecting wheel in fig. 8.

Fig. 10 is a structural diagram of the middle rail assembly of the present invention.

Fig. 11 is a top view of the middle rail assembly of the present invention.

Fig. 12 is a sectional view taken along line a-a in fig. 10.

Fig. 13 is a structural diagram of the middle trolley scraper combination of the present invention.

Fig. 14 is a top view of the middle trolley scraper assembly of the present invention.

Fig. 15 is a sectional view taken along line a-a in fig. 13.

Detailed Description

The embodiment is that the turning plate type monorail mud scraper shown in fig. 1 comprises a driving device 1, a traction chain 2, a trolley scraper combination 6, a direction-changing wheel train 4, a track assembly 5 and a tensioning device, wherein the driving device 1 is arranged at the top of a water inlet end pool of a sedimentation pool, the direction-changing wheel train 4 is arranged at two ends of the sedimentation pool, the traction chain 2 is sleeved on the driving device 1 and the direction-changing wheel train 4 and is connected with the trolley scraper combination 6, the track assembly 5 is arranged at the middle position of the bottom of the sedimentation pool along the pool length direction, the trolley scraper combination 6 is arranged on the track assembly 5, the tensioning device comprises a manual tensioning device and an automatic tensioning device, and the automatic tensioning device comprises a pendulum tensioning device 3 and a large-span suspension structure;

as shown in fig. 2 to 4, the driving device 1 includes a driving seat 101, bearing seats 102, a driving shaft 103, a speed reducer 104, a chain wheel 105, a rotary encoder counter 106, and a bidirectional overload protection device 107, the driving seat 101 is fixedly disposed on the top of the water inlet end of the sedimentation tank, a pair of bearing seats 102 is fixedly disposed on the driving seat 101, the driving shaft 103 passes through the bearing seats 102, the chain wheel 105 is sleeved on the driving shaft 103 between the bearing seats, a traction chain 2 is sleeved on the chain wheel 105, the chain wheel 105 is provided with a shear pin 110, and an over-torsion set value of the shear pin is greater than the maximum value of the bidirectional overload protection device 107 and is less than the rated torques of the motor and the speed reducer for protection; one end of the driving shaft 103, which is positioned at the outer side of the bearing seat 102, is fixedly connected with a speed reducer 104, the driving shaft 103, a movable sleeve and the speed reducer 104 can be fixed by nuts, the other end of the driving shaft 103 is provided with a rotary code counter 106, and the rotary code counter 106 is connected with a Programmable Logic Controller (PLC); the speed reducer 104 is connected with a bidirectional overload protection device 107, and the speed reducer 104 is controlled by a Programmable Logic Controller (PLC);

as shown in fig. 8 to 9, the redirecting gear train 4 includes a first redirecting gear set 401 and a second redirecting gear set 402 respectively fixedly disposed at the left end and the right end of the sedimentation basin, and a third redirecting gear set 403 and a fourth redirecting gear set 404 respectively disposed below the first redirecting gear set 401 and the second redirecting gear set 402, wherein the first redirecting gear set 401, the second redirecting gear set 402, the third redirecting gear set 403 and the fourth redirecting gear set 404 are respectively composed of a redirecting gear bracket 405, a bracket shaft sleeve 406, a redirecting gear 407, a redirecting gear bushing 408, a redirecting gear hollow shaft 409, a long bolt 410 and a nut gasket; a redirection wheel hollow shaft 409 is sleeved on the long bolt 410, a redirection wheel bushing 408 is sleeved on the redirection wheel hollow shaft 409, a redirection wheel 407 is sleeved on the redirection wheel bushing 408 and is in interference fit with the redirection wheel hollow shaft, support shaft sleeves 406 are sleeved at two ends of the redirection wheel hollow shaft 409, and the support shaft sleeves 406 are welded on the redirection wheel supports 405;

as shown in fig. 10 to 12, the track assembly 5 includes a guide rail 501, an unlocking ejector rod 503 with an inclined surface is fixedly arranged at one end of the guide rail 501 located at the position of the mud pit of the sedimentation tank, and a wear-resistant sliding groove 504 is further arranged between the guide rails 501, so that a sliding groove is reduced compared with a conventional monorail mud scraper; two guide rails 501 are arranged in parallel and laid at the bottom of the sedimentation tank, and channel steel or standard light rails can be selected as the guide rails 501. An unlocking ejector rod 503 with an inclined surface is fixedly arranged at one end of the guide rail 501, which is positioned at the position of the mud pit of the sedimentation tank, and the unlocking ejector rod 503 is used for unlocking a scraper lock 607 of the trolley so as to provide conditions for turning over the scraper 602;

as shown in fig. 13 to 15, the trolley scraper assembly 6 includes a trolley frame 601, the trolley frame 601 is provided with a scraper 602, the middle part of the upper end of the scraper 602 is hinged to the trolley frame 601, an adjustable rubber scraper 619 is fixedly disposed below the scraper 602, the bottom of the trolley frame 601 is provided with a traveling wheel 603 contacting with the track surface of the guide rail 501, the trolley frame 601 can be further provided with an anti-deviation wheel 604, if a standard track and the traveling wheel are adopted, the anti-deviation wheel can be omitted, the trolley frame 601 is further provided with a slide bar pull rod set, a slide bar 605 of the slide bar pull rod set is disposed in two fixed sleeves 611 of the trolley frame 601, the slide bar 605 slides within a certain range of the two fixed sleeves 611, a limit ring 612 is disposed on the slide bar 605, two ends of the slide bar 605 are connected to the traction chain 2, one end of the pull bar 606 of the slide bar pull rod set is hinged to the middle of the slide bar 605 through a connecting pin 608, the other end is hinged with the middle part of the lower end of the scraper 602; the trolley frame 601 is further provided with a scraper lock 607, one end of the scraper lock 607 is hinged to the trolley frame 601, the other end of the scraper lock 607 freely falls on the trolley frame 601, the free end head of the scraper lock 607 is in a right triangle shape with a downward inclined surface, and the scraper lock 607 is positioned above the connecting pin 608 of the pull rod; the upper end of the scraper lock 607 is provided with an unlocking roller 609, when the trolley scraper combination 6 scrapes mud to the position close to the terminal point, the unlocking ejector rod 503 on the guide rail 501 jacks up the unlocking roller 609 by utilizing the triangular inclined plane, so that the scraper lock 607 is opened, and the scraper 602 is turned over when the trolley scraper combination 6 returns. When the scraper 602 is in a horizontal position in a return stroke, the scraper lock 607 is in an unlocking state, when the trolley reversing scraper 602 rotates downwards from the horizontal state to a state close to a vertical state, the scraper lock head falls down to clamp the connecting pin 608, and the scraper lock 607 is in a closing state;

when the sliding rod 605 slides to the limit stroke in the mud scraping direction, the connecting pin 608 of the sliding rod 605 and the pull rod 606 gradually jacks up the scraper lock 607 along the triangular oblique edge of the free end head of the scraper lock 607, finally, the connecting pin 608 passes through the triangular vertex, the scraper lock 607 falls under the action of gravity, and the connecting pin 608 is locked in the triangular straight edge of the free end head of the scraper lock 607, so that the scraper 602 cannot turn over due to the increase of mud scraping resistance; the upper end of the scraper lock 607 is provided with an unlocking roller 609,

when mud scraping is started, the traction chain 2 pulls the sliding rod 605 to slide to one side, and the scraper 602 is driven to rotate and close through the pull rod 606, and at the moment, the sliding rod 605 reaches the stroke limit; when the traction chain 2 continues to draw, the sliding rod 650 and the trolley frame 601 do not slide relatively, so that the whole trolley scraper combination 6 runs towards the mud pit together, and the same principle is carried out in the opposite direction.

As shown in fig. 8, the traction chain 2 sequentially passes through the fourth direction-changing wheel set 404, the second direction-changing wheel set 402, the first direction-changing wheel set 401, the driving sprocket 105, the third direction-changing wheel set 403 and the front end of the trolley scraper combination 6 from the rear end of the trolley scraper combination 6 to realize closed-loop connection; in order to avoid the sliding friction of the traction chain 2 directly falling on the full pool length of the silt layer at the pool bottom, the parts of the traction chain 2 between the front end of the trolley scraper combination 6 and the third bend wheel set 403 and between the rear end of the trolley scraper combination 6 and the fourth bend wheel set 404 are supported by the wear-resistant sliding groove 504 in the track assembly 5.

Further, as shown in fig. 5, the speed reducer 104 is connected with a bidirectional overload protection device 107, the bidirectional overload protection device 107 includes an inner height-adjustable fixing sleeve 107-1, an upper movable sleeve 107-2 and a lower movable sleeve 107-3 are arranged in the inner height-adjustable fixing sleeve 107-1, a compression spring 107-4 is arranged in the upper movable sleeve 107-2 and the lower movable sleeve 107-3, one end of a lead screw 107-5 is arranged to penetrate through the compression spring 107-4 and fixed on the driving seat 101, the other end of the lead screw 107-5 is fixedly connected to a speed reducer ear seat 109, a sensor fixing seat 107-6 is further fixedly arranged on the lead screw 107-5, a normally open proximity switch 107-7 is arranged on the sensor fixing seat 107-6, and a position of an angle iron 101-1 of the driving seat 101, which is opposite to the normally open proximity switch 107-7, can be welded to the angle iron 101-1 of the driving seat 101 The position adjustable induction sheet 107-8 is divided into an upper induction sheet and a lower induction sheet 107-8, and the upper induction sheet and the lower induction sheet are respectively correspondingly overloaded in the upper direction and the lower direction; the driving seat 101 is provided with a driving cover 108 for covering the whole driving device 1. When the speed reducer 104 is pressed downwards, the screw rod 107-5 descends to drive the upper movable sleeve 107-2 to descend, and the spring 107-4 is compressed; when the speed reducer 104 is pulled upwards, the screw rod 107-5 moves upwards to drive the lower movable sleeve 107-3 to move upwards, and the compression spring 107-4 is compressed. A proximity switch 107-7 is arranged on the screw rod 107-5, and the normally open type proximity switch 107-7 is connected to a programmable logic controller PLC; an upper position adjustable induction sheet 107-8 and a lower position adjustable induction sheet 107-8 are fixed opposite to the proximity switch 107-7, the positions of the induction sheets are adjustable within a small range, and an overload torque value is set according to the compression amount of the compression spring 107-4. Meanwhile, the driving chain wheel 105 is connected with a shear pin 110 for protection, and the over-torsion set value of the driving chain wheel is larger than the maximum value of the bidirectional overload protection device 107 and smaller than the rated torque of the motor and the reducer, and is used as the final-stage protection; in addition, a motor thermal relay can be arranged for protection, and the safety performance of the equipment is greatly improved under triple protection.

Further, as shown in fig. 2, in order to easily raise the height of the driving device 1 by matching with an adjusting screw and a nut as needed to achieve the purpose of manual tensioning, the manual tensioning device includes an adjusting screw and an adjusting nut which are arranged on the driving seat 101 and used for adjusting the overall height of the driving device 1, a jack limiting seat 111 is arranged at the bottom of the driving seat 101, and the jack limiting seat 111 can be arranged in a zigzag clamping groove structure; the jack limiting seat 111 can be adapted to a split type manual hydraulic jack for lifting the height of the driving device 1. The device for lifting the whole driving seat 101 by the manual hydraulic jack at the point close to the resultant force point forms a fixed tensioning device of the traction chain of the mud scraper. The jack is a standard component produced in large batch in the automobile industry, has reliable performance and low cost, and does not need to be provided with a manual hoist fixing and tensioning device which extends from the ground to the bottom of the sedimentation tank.

Further, as shown in fig. 6 to 7, in order to realize the automatic tensioning of the trolley scraper combination 6 in the return stroke process, the flap-type monorail mud scraper is further provided with a pendulum tensioning device 3, the pendulum tensioning device 3 is arranged on a water inlet end wall below the driving device 1, the pendulum tensioning device 3 comprises a fixed seat 301 fixedly arranged on the wall of the pond, a swing frame 302 is movably connected to the fixed seat 301, the swing frame 302 is connected to an upright post on the top of the pond through a limiting zipper 305, one end of the swing frame 302 is fixedly provided with a rope pressing wheel 303 used for pressing the traction chain 2, and two ends of the rope pressing wheel 303 are provided with counterweights 304.

Further, as shown in fig. 8, in order to realize the automatic tensioning of the loose edge at the side of the traction chain in the mud scraping process, the traction chain 2 is in a large-span suspension structure between the first direction-changing wheel set 401 and the second direction-changing wheel set 402. The bearing pulley can be additionally arranged when the span is large, the large-span suspension structure is in a sagging state in the equipment mud scraping process and provides tensioning force of loose edges, the chain hung by the large span is calculated through the design of a catenary line, the length change caused by sagging can be ensured not to interfere the operation of a trolley and can be increased in the middle to reduce the sagging height of the catenary when the length of a pool is long, the chain length change under the tensioning action of the limit position provided by the pendulum bob tensioning device 3 is kept close to the chain length change, so that when the limit zipper 305 of the pendulum bob tensioning device 3 is in a tensioning state, the forward and reverse tensioning actions are all in the limit position, and at the moment, only the height of the driving device 1 needs to be adjusted, and each tensioning system can continue to operate stably.

Further, in order to fix the direction-changing wheel hollow shaft 409 and the support shaft sleeve 406 into a stable and reliable whole under the locking force of the long bolt 410 and the nut gasket, the direction-changing wheel 407 and the direction-changing wheel bushing 408 may be mounted on the direction-changing wheel hollow shaft 409 to rotate freely, and the axial length of the direction-changing wheel hollow shaft 409 is slightly smaller than the distance between the outer end faces of the two support shaft sleeves 406. Under the locking force of the long bolt and the nut gasket, the end distance is reduced inwards to be the same as the axial length of the hollow shaft 409 of the bend wheel, at the moment, the locking force is applied to the outer end faces of the hollow shaft 409 of the bend wheel and the outer end face of the support shaft sleeve 406, and due to the existence of static friction force, the relative degree of freedom of the long bolt, the hollow shaft 409 of the bend wheel and the outer end face of the support shaft sleeve 406 is 0, so that the long bolt, the hollow shaft 409 of the bend wheel and the support shaft sleeve 406 are fixed to be a stable and reliable whole.

Further, as shown in fig. 10 to 12, in order to buffer the impact force generated by the over-travel operation of the trolley scraper combination 6, two ends of the guide rail 501 are provided with buffer rubber heads 502; in order to facilitate the sealing of the gap between the wear-resistant sliding groove 504 and the two guide rails 501, a guide rail closing plate 505 is further disposed between the guide rails 501.

Further, as shown in fig. 13, in order to make the turning of the squeegee 602 smoother, a squeegee weight 610 is disposed above the squeegee 602, so that the moment of the self weight of the squeegee assembly to the rotation center is close to 0 at any angle.

Further, as shown in fig. 15, in order to compensate for a large gap between the pool bottom and the screed due to civil engineering errors, an adjustable rubber screed 619 is provided at the lower end of the screed 602. Because the secondary sedimentation tank activated sludge has thorough requirements on sludge scraping of the sludge scraper, if the gap between the tank bottom and the scraper is large, sludge at a certain position exists for a long time, the activity of biological strains can disappear, and the biological strains finally float out of the water surface to influence sedimentation.

Further, as shown in fig. 14, in order to better scrape off dirt between the guide rails 501, a first front inclined blade 613, a second front inclined blade 614, a first rear inclined blade 615, and a second rear inclined blade 616 are fixedly arranged at the front and rear of the four road wheels of the bogie frame 601; the front end and the rear end of the bogie frame 601 are also fixedly provided with a front scraper 617 and a rear scraper 618.

Certainly, in order to realize the automatic operation of the equipment, a control box can be also arranged for installing some electric control equipment, and the electric control equipment can use a Programmable Logic Controller (PLC) and some conventional electric elements, such as a thermal relay, an intermediate relay, a contactor, a circuit breaker, a switch and the like; the rotary coding counter 106 and the normally open proximity switch 107-7 are both connected to the PLC, the speed reducer 104 is controlled by the PLC, and the PLC controls the starting, stopping, reversing and the like of the speed reducer 104 through a circuit breaker and a contactor, so that the stroke and reversing control of the trolley scraper combination 6 is realized together.

The reciprocating operation stroke of the mud scraper is realized by a rotary coding counter 106 arranged at the tail end of a driving shaft 103, when the equipment is debugged for the first time, the trolley scraper combination 6 is operated to the mud scraping direction to strike a buffer rubber head 502 of a guide rail 501, the bidirectional overload protection device 107 is triggered, the equipment is stopped, the reading of an encoder in the PLC is cleared, then the return stroke of the trolley scraper combination 6 is reversely operated, the PLC starts to record the reading of the encoder, when the trolley scraper combination 6 is operated to the return stroke to strike the buffer rubber head 502 at the other end, the bidirectional overload protection device 107 is triggered, the equipment is stopped, the reading of the encoder in the PLC at the moment is observed and is recorded as the maximum stroke, then the starting point and the end point of the trolley scraper combination 6 can be taken between the reading 0 value and the maximum stroke value of the PLC according to the actual requirement, and a PLC program can be compiled according to the mud scraping mode of different strokes according to the actual mud amount distribution of a sedimentation tank, not only a plurality of trolley position sensors are saved, but also the trolley has abundant self-defined space.

The tensioning system of the mud scraper is divided into an automatic tensioning part and a manual tensioning part, the automatic tensioning part in the mud scraping process is completed through a large-span catenary chain between a first bend pulley 401 group and a second bend pulley group 402, the automatic tensioning part in the return stroke process is completed through a pendulum tensioning device 3 arranged on a water inlet end face, the downward limit position of the large-span catenary chain is controlled through a catenary calculation model, the chain extension amount of the large-span catenary chain is controlled to be the same as that of the limit position of the pendulum tensioning device 3, the operation of a trolley scraper combination 6 cannot be interfered, the limit position of the pendulum tensioning device 3 ensures that the upward and downward chains cannot be interfered, when the pendulum tensioning device 3 is in the limit position, a zipper 305 arranged on the pendulum tensioning device is straightened, daily patrol personnel can visually observe the straightened state of the zipper 305 on the top of the pool, at the moment, only a driving cover 108 needs to be opened, nuts at four corners on a driving seat 101 are loosened, the manual split type hydraulic jack is placed at the jack limiting seat position below the driving seat 101, the jack is pressed to lift the driving device 1, the purpose of manual tensioning is achieved, finally the jack is removed, the nut is screwed, and the driving cover 108 is covered. By adopting the tensioning mode, the tensioning device is simple, convenient and reliable, and the floor area for installing the manual hoist is saved.

The opening and closing of the scraper 602 of the trolley scraper combination 6 are completed by the pulling force of the traction chain 2, a movable slide bar 605 is arranged on the trolley scraper combination 6, the slide bar 605 is arranged in a fixed sleeve 611 of the trolley frame 601, the slide bar 605 can slide in the fixed sleeve 611 of the trolley within a certain range, a limit ring 612 is arranged on the slide bar 605, the left end and the right end of the slide bar 605 are connected with the traction chain 2, when the traction chain 2 is drawn in different directions, the slide bar 605 slides in the corresponding direction, and when the slide bar 605 slides to the limit, the traction chain 2 continues to draw to enable the slide bar 605 and the trolley scraper combination 6 to move together;

the sliding rod 605 is freely drawn in the front and rear direction relative to the trolley, so that when the sliding rod moves, the friction force between the sliding rod 605 and the fixed sleeve 611 is not enough to enable the trolley to overcome the friction force of the trolley to walk, the fixed sleeve 611 is provided with two concentric and symmetrical parts which respectively support the left section and the right section of the sliding rod 605, a circle of limiting ring 612 is arranged in the middle of the sliding rod 605, when the sliding rod 605 moves towards one direction, the limiting ring 612 can approach the fixed sleeve 611 at one end, and when the limiting ring 612 collides with the fixed sleeve 611, the sliding rod continues to be drawn to enable the limiting ring 612 to push the fixed sleeve 611 to further drive the trolley to move.

The sliding rod 605 is connected with the lower end of the scraping plate 602 through a hinged pull rod 606, the upper end of the scraping plate 602 is hinged with the trolley frame 601, and the pull rod 606 can enable the horizontal movement of the sliding rod 605 to drive the scraping plate 602 to rotate along a hinged point on the trolley frame 601, so that the actions of opening and closing the scraping plate 602 are achieved.

By the calculation of the mechanical model, the carriage 601 is ensured not to move when the scraper 602 is opened and closed. The scraper lock 607 on the trolley frame 601, one end of the scraper lock 607 is hinged on the trolley frame 601, the other end is freely dropped on the trolley frame 601, the head of the free end is a right triangle with a downward inclined plane, when the scraper 602 is about to close, the slide rod 605 moves to make the slide rod pull rod connecting pin 608 move along the inclined edge of the triangle of the scraper lock 607 to jack the scraper lock 607, after the scraper 602 is closed, the connecting pin 608 crosses the apex angle of the inclined edge of the triangle, the scraper lock 607 drops, the right-angle edge locks the pin 608 to prevent it from sliding relatively, thus achieving the state of locking the scraper 602; when the trolley scraper combination 6 scrapes mud to the stroke end, the ejector rod 503 on the guide rail 501 jacks up the scraper lock 607 to unlock the closed state of the scraper 602, so that the scraper 602 can be smoothly opened when the trolley scraper combination 6 moves reversely. The scraper 602 is opened and closed in such a way that the return stroke is not limited to return to the end position, but can return to any position to start scraping mud, so that the flexibility of the equipment is greatly improved, and the scraper can be suitable for various process occasions.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited to the above embodiments, and various modifications made by the method concept and technical solution of the present invention or those directly applied to other applications without modification fall within the protection scope of the present invention.

Claims

1. A turning plate type monorail mud scraper comprises a driving device (1), a traction chain (2) and a trolley scraper combination (6), it is characterized by also comprising a redirection wheel train (4), a track assembly (5) and a tensioning device, the driving device (1) is arranged at the top of the water inlet end of the sedimentation tank, the direction-changing wheel trains (4) are arranged at the two ends of the sedimentation tank, the traction chain (2) is sleeved on the driving device (1) and the direction-changing wheel train (4) and is connected with the trolley scraper combination (6), the track assembly (5) is arranged at the middle position of the bottom of the sedimentation tank along the length direction of the tank, the trolley scraper combination (6) is arranged on the track assembly (5), the tensioning device consists of a manual tensioning device and an automatic tensioning device, and the automatic tensioning device consists of a pendulum tensioning device (3) and a large-span suspension structure;

the driving device (1) comprises a driving seat (101), a bearing seat (102), a driving shaft (103), a speed reducer (104), a chain wheel (105), a rotary coding counter (106) and a bidirectional overload protection device (107), the driving seat (101) is fixedly arranged at the top of the water inlet end of the sedimentation tank, a pair of bearing seats (102) is fixedly arranged on the driving seat (101), the driving shaft (103) penetrates through the bearing seats (102), a chain wheel (105) is sleeved at the position, between the bearing seats, of the driving shaft (103), the chain wheel (105) is sleeved with a traction chain (2), the chain wheel (105) is provided with a shearing pin, one end of the driving shaft (103) positioned at the outer side of the bearing seat (102) is fixedly connected with a speed reducer (104), the other end is provided with a rotary coding counter (106), the rotary coding counter (106) is connected with a Programmable Logic Controller (PLC); the speed reducer (104) is connected with a bidirectional overload protection device (107), and the speed reducer (104) is controlled by a Programmable Logic Controller (PLC);

the redirecting gear train (4) comprises a first redirecting gear set (401) and a second redirecting gear set (402) which are respectively and fixedly arranged at the left end and the right end of the sedimentation tank, and a third redirecting gear set (403) and a fourth redirecting gear set (404) which are respectively arranged below the first redirecting gear set (401) and the second redirecting gear set (402), wherein the first redirecting gear set (401), the second redirecting gear set (402), the third redirecting gear set (403) and the fourth redirecting gear set (404) are respectively composed of a redirecting wheel bracket (405), a bracket shaft sleeve (406), a redirecting wheel (407), a redirecting wheel bushing (408), a redirecting wheel hollow shaft (409), a long bolt (410), a nut and a gasket; the long bolt (410) is sleeved with a redirection wheel hollow shaft (409), the redirection wheel hollow shaft (409) is sleeved with a redirection wheel bushing (408), the redirection wheel bushing (408) is sleeved with a redirection wheel (407) and is in interference fit, two ends of the redirection wheel hollow shaft (409) are sleeved with support shaft sleeves (406), and the axial length of the redirection wheel hollow shaft (409) is slightly smaller than the distance between the outer end faces of the two support shaft sleeves (406); the support shaft sleeve (406) is fixed with the long bolt (410) through a gasket and a nut, the nut is prevented from loosening by using a split pin, and the support shaft sleeve (406) is welded on the bend wheel support (405);

the track assembly (5) comprises guide rails (501), an unlocking ejector rod (503) with an inclined surface is fixedly arranged at one end of each guide rail (501) positioned at a mud pit of the sedimentation tank, and a wear-resistant sliding groove (504) is arranged between the guide rails (501);

the trolley scraper combination (6) comprises a trolley frame (601), a scraper (602) is arranged on the trolley frame (601), the middle part of the upper end of the scraper (602) is hinged with the trolley frame (601), an adjustable rubber scraper (619) is fixedly arranged below the scraper (602), the bottom of the trolley frame (601) is provided with a traveling wheel (603) contacted with the track surface of the guide rail (501), the trolley frame (601) is also provided with a slide bar pull rod group, a slide bar (605) of the slide bar pull rod group is arranged in two fixed sleeves (611) of the trolley frame (601), a limit ring (612) is arranged on the slide bar (605), two ends of the slide bar (605) are connected with a traction chain (2), one end of a pull rod (606) of the slide rod pull rod group is hinged with the middle part of the slide rod (605) through a connecting pin (608), and the other end of the pull rod is hinged with the middle part of the lower end of the scraper (602); the trolley frame (601) is also provided with a scraper lock (607); one end of the scraper lock (607) is hinged on the trolley frame (601), the other end of the scraper lock (607) freely falls on the trolley frame (601), the head part of the free end of the scraper lock (607) is a right-angled triangle with a downward inclined surface, and the scraper lock (607) is positioned above the connecting pin (608); an unlocking roller (609) is arranged at the upper end of the scraper lock (607);

the traction chain (2) sequentially penetrates through the fourth direction-changing wheel set (404), the second direction-changing wheel set (402), the first direction-changing wheel set (401), the driving chain wheel (105), the third direction-changing wheel set (403) and the front end of the trolley scraper combination (6) from the rear end of the trolley scraper combination (6) to realize closed-loop connection; the part of the traction chain (2) between the front end of the trolley scraper combination (6) and the third direction-changing wheel set (403) and between the rear end of the trolley scraper combination (6) and the fourth direction-changing wheel set (404) is supported by a wear-resistant sliding groove (504) in the track assembly (5).

2. The turning plate type monorail mud scraper as claimed in claim 1, wherein said bidirectional overload protection device (107) comprises an inner height adjustable fixing sleeve (107-1), said inner height adjustable fixing sleeve (107-1) is internally provided with an upper movable sleeve (107-2) and a lower movable sleeve (107-3), said upper movable sleeve (107-2) and said lower movable sleeve (107-3) are internally provided with a compression spring (107-4), one end of a lead screw (107-5) is arranged to pass through the compression spring (107-4) and fixed on a driving seat (101), the other end of the lead screw (107-5) is fixedly connected on a speed reducer ear seat (109), said lead screw (107-5) is further fixedly provided with a sensor fixing seat (107-6), said sensor fixing seat (107-6) is provided with a normally open type proximity switch (107-7), the normally open type proximity switch (107-7) is connected to a Programmable Logic Controller (PLC); a position-adjustable induction sheet (107-8) is fixedly arranged on the angle steel (101-1) of the driving seat (101) relative to the position of the normally-open proximity switch (107-7); the driving seat (101) is provided with a driving cover (108) for covering the whole driving device (1).

3. The slat type monorail mud scraper as claimed in claim 1, wherein said manual tensioning device comprises an adjusting screw rod and an adjusting nut which are arranged on the driving seat (101) and used for adjusting the overall height of the driving device (1), a jack limiting seat (111) is arranged at the bottom of the driving seat (101), and the jack limiting seat (111) is adapted to a split type manual hydraulic jack used for lifting the height of the driving device (1).

4. The flap type monorail mud scraper as defined in claim 1, wherein said pendulum tensioning device (3) is disposed on the water inlet end wall under the driving device (1), said pendulum tensioning device (3) comprises a fixed seat (301) fixedly disposed on the pool wall, said fixed seat (301) is movably connected with a swing frame (302), said swing frame (302) is connected to the upright post on the pool top through a spacing zipper (305), one end of said swing frame (302) is fixedly disposed with a rope pressing wheel (303) for pressing the traction chain (2), and two ends of said rope pressing wheel (303) are disposed with counterweights (304).

5. The slat type monorail dredge of claim 1, wherein the traction chain (2) is in a large-span suspension structure between the first direction-changing wheel set (401) and the second direction-changing wheel set (402).

6. The slat type monorail mud scraper as claimed in claim 1, wherein the axial length of the bend wheel hollow shaft (409) is slightly smaller than the distance between the outer end faces of the two support shaft sleeves (406).

7. The turning plate type monorail mud scraper as claimed in claim 1, wherein two ends of said guide rail (501) are provided with buffer rubber heads (502), and a guide rail closing plate (505) is further arranged between said guide rails (501).

8. The flap monorail dredge of claim 1 wherein a scraper counterweight (610) is provided above said scraper (602).

9. The slat type monorail dredge of claim 1, wherein the lower end of the dredge (602) is provided with an adjustable rubber scraper (619).

10. The turning plate type monorail mud scraper as claimed in claim 1, wherein a first front inclined scraper (613), a second front inclined scraper (614), a first rear inclined scraper (615) and a second rear inclined scraper (616) are fixedly arranged at the front and rear of the four travelling wheels of the bogie frame (601), respectively; the front end and the rear end of the trolley frame (601) are also fixedly provided with a front scraper (617) and a rear scraper (618).