A flip-plate monorail scraper

Abstract

A flap-type monorail scraper includes a driving device, a traction chain, a trolley scraper assembly, a redirecting wheel system, a track assembly, and a tensioning device. The driving device is arranged at the top of the water inlet end of the sedimentation tank, the redirecting wheel system is arranged at both ends of the sedimentation tank, the traction chain is sleeved on the driving device and the redirecting wheel system, the track assembly is arranged at the middle position of the bottom of the sedimentation tank along the length of the tank, and the trolley scraper assembly is installed on the track assembly; the tensioning device is composed of a manual tensioning device and an automatic tensioning device, and the automatic tensioning device is composed of a pendulum tensioning device and a large-span suspension structure. The present invention solves the problems that the existing flap-type monorail scraper cannot meet the process requirements of partial stroke and full stroke combined scraping, the reversing and tensioning mechanisms are complex and occupy more ground space, the installation and maintenance are complicated, the chain is easy to wear, and the manufacturing cost of the whole machine is high.

Description

Technical Field

[0001] The invention relates to the field of water treatment equipment, and in particular to a flap-type monorail scraper. Background Art

[0002] At present, the working principle of the existing monorail scraper is that under the drive of the driving device, the traction chain and the traction scraper trolley run back and forth intermittently or continuously on the bottom of the pool. The scraper plate on the scraper trolley continuously scrapes the mud and sediment on the bottom of the pool into the mud collecting tank, and then discharges it through the mud discharge pipe. The process when the scraper blade is vertically erected and moves toward the mud collection pit is called the scraping process, and conversely, the process when the scraper blade runs horizontally in the opposite direction of the mud collection pit is called the return process; when the trolley reaches the designated position and completes a scraping process, the touch plate on the scraper trolley touches the limit rod extending from the top of the pool to the bottom of the pool, and the driving device reverses the trolley for return. Before the trolley returns, when approaching the limit rocker, the horizontal top rod fixedly installed at the end of the pool flips the upright scraper blade into a horizontal state that is nearly parallel to the bottom of the pool; when the trolley returns to the designated position and completes a return process, the touch plate on the trolley also touches the limit rod extending from the top of the pool to the bottom of the pool at the other end, and the driving device reverses the trolley for scraping mud, and the horizontal top rod fixedly installed at the other end of the pool flips the horizontal scraper blade into an upright state perpendicular to the bottom of the pool.

[0003] However, this type of single-track scraper has the following problems: the fixed top rod flap mechanism requires the scraping and return reversal to reach the initial set position near the two ends of the pool, so each scraping and return must be a full stroke, and the well-known horizontal flow sedimentation tank, especially the primary sedimentation tank, has a large amount of sediment near the water inlet and a small amount of sediment near the water outlet. The actual need to increase the number of scraping near the water inlet and reduce the number of scraping near the water outlet, that is, to add a short distance (non-full stroke) scraping stroke, cannot be achieved.

[0004] The conventional automatic tensioning device uses two sets of inclined slide rail gravity tensioning rollers for two upright chains under the driving sprocket. The rope-pressing rollers are equipped with counterweights on both sides and are placed on an inclined track. Since the forces on both sides of the rope-pressing roller cannot be completely balanced, the tensioning device is prone to deviation during operation, resulting in jamming and affecting the tensioning efficiency. The conventional manual tensioning device is at the tail end of the pool (away from the driving end), and the chain tension is adjusted by manually stretching the redirecting wheel of the gate hoist. This structure inevitably occupies the installation position at the tail end of the pool, and this position is usually equipped with a water collection tank. For most projects with inclined pipes installed, the water collection tank and the inclined pipe below will affect the installation of the manual tensioning device.

[0005] The contact reversing device uses the contact rod on the scraper to touch the limit rocker installed at the pool end, which moves the sensor on the top of the pool to activate the proximity switch and send a signal to the control box to realize the reversing process. Each scraper needs to be equipped with two reversing devices, so it must be equipped with two proximity switches and protective covers, and at least one pool-long control cable needs to be laid, which is not only complex in structure, but also prone to failure.

[0006] The conventional drive is in the form of a cycloidal pin reducer directly connected to a sprocket, and its mechanical overload protection is only achieved by shear pins. Since scraping and return strokes change alternately, the shear pins are prone to fatigue fracture due to alternating stress, resulting in misjudgment of the scraper's operating resistance. In addition, this type of mechanical overload protection has poor adjustability and cannot adjust the cut-off torque according to actual conditions on site.

[0007] The upper and lower traction chains of the pool bottom scraper are stacked and arranged near the pool bottom, supported by grooved rails. The chains repeatedly slide and rub against the rails at the pool bottom where the sludge concentration is high, increasing the wear of the chains and rails. Therefore, it is important to invent a flap-type single-rail scraper that can solve the above defects and improve the reliability of equipment operation. Summary of the invention

[0008] The purpose of the present invention is to provide a flap-type monorail scraper to solve the problems that the existing flap-type monorail scraper cannot achieve the process requirements of partial stroke and full stroke combined scraping, the reversing and tensioning mechanisms are complicated and occupy more ground space, the installation and maintenance are complicated, the chain is easy to wear, and the manufacturing cost of the whole machine is high.

[0009] The technical solution adopted by the present invention to solve its technical problem is:

[0010] A flap-type monorail scraper comprises a driving device, a traction chain, a trolley scraper assembly, a redirecting wheel system, a track assembly, and a tensioning device. The driving device is arranged on the top of the water inlet end of the sedimentation tank, the redirecting wheel system is arranged at both ends of the sedimentation tank, the traction chain is sleeved on the driving device and the redirecting wheel system and connected to the trolley scraper assembly, the track assembly is arranged at the middle position of the bottom of the sedimentation tank along the tank length direction, and the trolley scraper assembly is installed on the track assembly; the tensioning device is composed of a manual tensioning device and an automatic tensioning device, and the automatic tensioning device is composed of a pendulum tensioning device and a large-span suspension structure;

[0011] The driving device comprises a driving seat, a bearing seat, a driving shaft, a speed reducer, a sprocket, a rotary encoder counter, and a bidirectional overload protection device. The driving seat is fixedly arranged on the top of the water inlet end of the sedimentation tank, a pair of bearing seats are fixedly arranged on the driving seat, the driving shaft passes through the bearing seats, a sprocket is sleeved on the position between the bearing seats on the driving shaft, a traction chain is sleeved on the sprocket, and a shear pin is arranged on the sprocket. One end of the driving shaft located outside the bearing seat is fixedly connected to the speed reducer, and the other end is arranged with a rotary encoder counter; the rotary encoder counter is connected to a programmable logic controller PLC; the speed reducer is connected to a bidirectional overload protection device, and the speed reducer is controlled by the programmable logic controller PLC;

[0012] The redirecting wheel system comprises a first redirecting wheel group and a second redirecting wheel group respectively fixedly arranged at the left and right ends of the sedimentation tank, and a third redirecting wheel group and a fourth redirecting wheel group respectively arranged below the first redirecting wheel group and the second redirecting wheel group. The first redirecting wheel group, the second redirecting wheel group, the third redirecting wheel group and the fourth redirecting wheel group are all composed of a redirecting wheel bracket, a bracket sleeve, a redirecting wheel, a redirecting wheel bushing, a redirecting wheel hollow shaft, long bolts and nuts and gaskets; the long bolts are sleeved with a redirecting wheel hollow shaft, the redirecting wheel hollow shaft is sleeved with a redirecting wheel bushing, the redirecting wheel bushing is sleeved with a redirecting wheel and has an interference fit, the two ends of the redirecting wheel hollow shaft are sleeved with bracket sleeves, and the axial length of the redirecting wheel hollow shaft is slightly smaller than the distance between the outer end faces of the two bracket sleeves; the bracket sleeve is fixed to the long bolt by a gasket, a nut, and a cotter pin is used to prevent the nut from loosening, and the bracket sleeve is welded to the redirecting wheel bracket;

[0013] The track assembly comprises a guide rail, one end of which is located at the mud pit of the sedimentation tank and is fixedly provided with an unlocking push rod with an inclined surface, and a wear-resistant slide groove is also provided between the guide rails;

[0014] The trolley scraper assembly comprises a trolley frame, a scraper is arranged on the trolley frame, the middle part of the upper end of the scraper is hinged with the trolley frame, and an adjustable rubber scraper is fixedly arranged under the scraper, and a walking wheel in contact with the guide rail track surface is arranged at the bottom of the trolley frame. The trolley frame is also provided with a sliding rod pull rod group. The sliding rod of the sliding rod pull rod group is arranged in two fixed sleeves of the trolley frame, a limiting ring is arranged on the sliding rod, and the two ends of the sliding rod are connected to a traction chain. One end of the pull rod of the sliding rod pull rod group is hinged with the middle of the sliding rod through a connecting pin, and the other end 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 on the trolley frame, and the other end falls freely on the trolley frame, and the free end head of the scraper lock is a right-angled triangle with the inclined surface facing downward, and the scraper lock is located above the connecting pin; the upper end of the scraper lock is provided with an unlocking roller;

[0015] The traction chain passes through the fourth redirecting wheel group, the second redirecting wheel group, the first redirecting wheel group, the driving sprocket, the third redirecting wheel group, and the front end of the trolley scraper assembly in sequence from the rear end of the trolley scraper assembly to realize a closed-loop connection; the part of the traction chain between the front end of the trolley scraper assembly and the third redirecting wheel group, and between the rear end of the trolley scraper assembly and the fourth redirecting wheel group is supported by the wear-resistant slide groove in the track assembly.

[0016] Furthermore, the bidirectional overload protection device includes an inner height adjustable fixed sleeve, an upper movable sleeve and a lower movable sleeve are arranged in the inner height adjustable fixed sleeve, compression springs are arranged in the upper movable sleeve and the lower movable sleeve, one end of the screw rod passes through the compression spring and is fixed on the drive seat, the other end of the screw rod is fixedly connected to the reducer ear seat, and a sensor fixing seat is also fixedly arranged on the screw rod, a normally open proximity switch is arranged on the sensor fixing seat, and the normally open proximity switch is connected to the programmable logic controller PLC; a position-adjustable induction plate is fixedly arranged on the angle steel of the drive seat relative to the position of the normally open proximity switch; and a drive cover for covering the entire drive device is arranged on the drive seat.

[0017] Furthermore, in order to achieve the purpose of manual tensioning, the manual tensioning device includes an adjusting screw and an adjusting nut arranged on the driving seat for adjusting the overall height of the driving device. A jack limit seat is arranged at the bottom of the driving seat, and the jack limit seat is adapted to a split manual hydraulic jack for raising the height of the driving device.

[0018] Furthermore, in order to realize automatic tensioning of the trolley scraper assembly during the return process, the pendulum tensioning device is arranged on the water inlet end wall below the driving device, and the pendulum tensioning device includes a fixed seat fixed on the pool wall, and a swing frame is movably connected to the fixed seat, and the swing frame is connected to the column on the top of the pool through a limiting zipper, and a rope pressing wheel for pressing the traction chain is fixedly arranged at one end of the swing frame, and counterweights are arranged at both ends of the rope pressing wheel.

[0019] Furthermore, in order to realize automatic tensioning of the trolley scraper assembly during the mud scraping process, the traction chain between the first redirecting wheel set and the second redirecting wheel set is a large-span suspension structure.

[0020] Furthermore, in order to fix the steering wheel hollow shaft and the bracket sleeve into a stable and reliable whole under the locking force of the long bolts and nuts and washers, the steering wheel and the steering wheel bushing can be installed on the steering wheel hollow shaft and rotate freely, and the axial length of the steering wheel hollow shaft is slightly smaller than the distance between the outer end faces of the two bracket sleeves.

[0021] Furthermore, in order to buffer the impact force generated by the over-travel operation of the trolley scraper combination, buffer rubber heads are provided at both ends of the guide rails; in order to facilitate sealing the gap between the wear-resistant slide groove and the two guide rails, a guide rail sealing plate is also provided between the guide rails.

[0022] Furthermore, in order to make the scraper flip more smoothly, a scraper counterweight is provided above the scraper to ensure that the torque of the scraper assembly's own weight on the rotation center is close to 0 at any angle.

[0023] Furthermore, in order to compensate for the larger gap between the pool bottom and the scraper caused by civil construction errors, an adjustable rubber scraper is provided at the lower end of the scraper.

[0024] Furthermore, in order to better scrape off the dirt between the guide rails, the four walking wheels of the trolley frame are fixedly provided with a first front oblique scraper, a second front oblique scraper, a first rear oblique scraper, and a second rear oblique scraper in front and behind; the front and rear ends of the trolley frame are also fixedly provided with a front scraper and a rear scraper.

[0025] Beneficial effects of the present invention: The present invention realizes the flipping of the scraper by pulling the chain, and at the same time sets a scraper lock to limit the lifting of the scraper under the action of sludge resistance, ensuring the reliability of the scraping action; it can realize the scraper vehicle to return to any position and change direction to start scraping, which greatly improves the flexibility of the scraper and is suitable for various sedimentation tanks with uneven mud distribution; while increasing the scraping capacity, it reduces the traction load of the chain. The pendulum tensioning device cooperates with the catenary tensioning method, which greatly simplifies the structure of the tensioning device, and the flexible pendulum also makes the automatic tensioning stable and reliable, reducing the cost. The lifting ring metal chain closest to the mud and sand layer at the bottom of the pool is moved up to the area close to the clear water. The chain wear is reduced and the service life is long. There is no need to adjust the chain length frequently. Therefore, the manual tensioning device is omitted and replaced by a long screw rod to adjust the height of the drive seat. The flexible and inexpensive manual split hydraulic jack for vehicles can easily lift the drive seat near the center of the combined force to achieve manual tensioning of the chain. A set of jacks can be used for multiple scrapers, which greatly saves costs and saves the installation space of the manual tensioning device. The two-way overload protection device composed of a compression spring, a reducer over-torque arm and a proximity switch is not only stable and reliable, but also can adjust the overload torque within a certain range. It is also equipped with shear pin protection and thermal relay protection, which greatly improves the safety of the equipment. The PLC and rotary encoder counter are used to calculate the displacement of the scraper, which reduces the layout of electromechanical sensors and cables installed at both ends of the pool extending from the bottom of the pool to the top of the pool. The system can automatically eliminate the inertia of parking in the forward and reverse directions of driving, and automatically correct the operation error caused by the reversing scraper of the scraper due to the looseness of the chain, so as to ensure the long-term and stable operation of the scraper cycle. The lower traction chain of the scraper running back and forth on the bottom of the pool is moved up to the center of the scraper and suspended away from the mud and sand layer at the bottom of the pool, which improves the operating environment of the chain, avoids friction with the support rail, and is conducive to extending the service life of the chain. At the same time, the suspended chain plays a natural tensioning role, which is conducive to the stable operation of the scraper traction device and reduces costs.

[0026] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a structural arrangement diagram of a flap-type monorail scraper in a sedimentation tank.

[0028] Figure 2 It is a structural diagram of the driving device in the present invention.

[0029] Figure 3 It is a left side view of the driving device in the present invention.

[0030] Figure 4 It is a top view of the driving device in the present invention.

[0031] Figure 5It is a structural diagram of the bidirectional overload protection device in the present invention.

[0032] Figure 6 It is a structural diagram of the pendulum tensioning device in the present invention.

[0033] Figure 7 It is a top view of the pendulum tensioning device in the present invention.

[0034] Figure 8 It is a structural arrangement diagram of the redirecting gear train in the sedimentation tank of the present invention.

[0035] Fig. 9 for Figure 8 AA section view of the middle steering wheel.

[0036] Fig.10 It is a structural diagram of the track assembly in the present invention.

[0037] Fig.11 It is a top view of the track assembly in the present invention.

[0038] Fig.12 for Fig.10 AA section view in.

[0039] Fig.13 It is a structural diagram of the trolley scraper assembly in the present invention.

[0040] Fig.14 It is a top view of the trolley scraper assembly in the present invention.

[0041] Fig.15 for Fig.13 AA section view in. DETAILED DESCRIPTION

[0042] Examples, such as Figure 1 The illustrated flip-plate monorail scraper comprises a driving device 1, a traction chain 2, a trolley scraper assembly 6, a redirecting wheel system 4, a track assembly 5, and a tensioning device. The driving device 1 is arranged on the top of the water inlet end of the sedimentation tank, the redirecting wheel system 4 is arranged at both ends of the sedimentation tank, the traction chain 2 is sleeved on the driving device 1 and the redirecting wheel system 4 and connected to the trolley scraper assembly 6, the track assembly 5 is arranged in the middle position of the bottom of the sedimentation tank along the tank length direction, the trolley scraper assembly 6 is installed on the track assembly 5, and the tensioning device is composed of a manual tensioning device and an automatic tensioning device, and the automatic tensioning device is composed of a pendulum tensioning device 3 and a large-span suspension structure;

[0043] like Figures 2 to 4As shown, the driving device 1 includes a driving seat 101, a bearing seat 102, a driving shaft 103, a reducer 104, a sprocket 105, a rotary encoder counter 106, and a bidirectional overload protection device 107. The driving seat 101 is fixedly arranged on the top of the water inlet end of the sedimentation tank, and a pair of bearing seats 102 are fixedly arranged on the driving seat 101. The driving shaft 103 passes through the bearing seats 102. A sprocket 105 is sleeved at a position between the bearing seats on the driving shaft 103. A traction chain 2 is sleeved on the sprocket 105. The sprocket 105 is provided with a shear pin 110, which is torque-resistant. The set value is greater than the maximum value of the bidirectional overload protection device 107 and less than the rated torque of the motor and the reducer as a protection; the end of the drive shaft 103 located outside the bearing seat 102 is fixedly connected to the reducer 104, and the drive shaft 103 can be fixed to the movable sleeve and the reducer 104 by a nut, and a rotary encoder counter 106 is arranged at the other end of the drive shaft 103, and the rotary encoder counter 106 is connected to the programmable logic controller PLC; the reducer 104 is connected to the bidirectional overload protection device 107, and the reducer 104 is controlled by the programmable logic controller PLC;

[0044] like Figures 8-9 As shown, the redirecting wheel system 4 includes a first redirecting wheel group 401 and a second redirecting wheel group 402 respectively fixedly arranged at the left and right ends of the sedimentation tank, and a third redirecting wheel group 403 and a fourth redirecting wheel group 404 respectively arranged below the first redirecting wheel group 401 and the second redirecting wheel group 402. The first redirecting wheel group 401, the second redirecting wheel group 402, the third redirecting wheel group 403 and the fourth redirecting wheel group 404 are all composed of a redirecting wheel bracket 405, a bracket shaft sleeve 406, The steering wheel 407, the steering wheel bushing 408, the steering wheel hollow shaft 409, the long bolts 410 and the nuts and washers are composed; the long bolts 410 are sleeved with the steering wheel hollow shaft 409, the steering wheel bushing 408 is sleeved on the steering wheel hollow shaft 409, the steering wheel bushing 408 is sleeved with the steering wheel 407 with interference fit, the two ends of the steering wheel hollow shaft 409 are sleeved with bracket sleeves 406, and the bracket sleeves 406 are welded to the steering wheel bracket 405;

[0045] like Figures 10-12As shown, the track assembly 5 includes a guide rail 501, and an unlocking rod 503 with an inclined surface is fixedly provided at one end of the guide rail 501 located at the mud pit position of the sedimentation tank. A wear-resistant slide 504 is also provided between the guide rails 501, which reduces one slide compared to the traditional single-track scraper. Two parallel guide rails 501 are laid at the bottom of the sedimentation tank, and the guide rails 501 can be selected from channel steel or standard light rail. An unlocking rod 503 with an inclined surface is fixedly provided at one end of the guide rail 501 located at the mud pit position of the sedimentation tank. The unlocking rod 503 is used to open the scraper lock 607 of the trolley to provide conditions for the scraper 602 to flip.

[0046] like Figures 13-15 As shown, the trolley scraper assembly 6 includes 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 to the trolley frame 601, an adjustable rubber scraper 619 is fixedly arranged below the scraper 602, and a walking wheel 603 in contact with the track surface of the guide rail 501 is arranged at the bottom of the trolley frame 601. The trolley frame 601 can also be provided with an anti-deviation wheel 604. If a standard track and walking wheel are used, the anti-deviation wheel can be omitted. The trolley frame 601 is also provided with a sliding rod and pull rod group, and the sliding rod 605 of the sliding rod and pull rod group is arranged in two fixed sleeves 611 of the trolley frame 601. The sliding rod 605 slides within a certain range of the two fixed sleeves 611, and a limiting ring 612 is arranged on the sliding rod 605. Both ends of the sliding rod 605 are connected to a traction chain Article 2, one end of the pull rod 606 of the slide rod pull rod group is hinged to the middle part of the slide rod 605 through the connecting pin 608, and the other end is hinged to the middle part of the lower end of the scraper 602; a scraper lock 607 is also provided on the trolley frame 601, one end of the scraper lock 607 is hinged to the trolley frame 601, and the other end falls freely on the trolley frame 601, and the free end head of the scraper lock 607 is a right-angled triangle with the inclined surface facing downward, and the scraper lock 607 is located above the connecting pin 608 of the pull rod; an unlocking roller 609 is provided at the upper end of the scraper lock 607, when the trolley scraper combination 6 scrapes mud to a position close to the end point, the unlocking push rod 503 on the guide rail 501 uses its triangular inclined surface to lift the unlocking roller 609, so that the scraper lock 607 is opened, so that the scraper 602 can be flipped over when the trolley scraper combination 6 returns. When the scraper 602 is in a horizontal position during the return journey, the scraper lock 607 is in an unlocked state. When the trolley reversing scraper 602 rotates downward from a horizontal state to a nearly vertical state, the scraper lock head falls and blocks the connecting pin 608, and the scraper lock 607 is in a closed state.

[0047] When the slide bar 605 slides to the limit of the travel in the direction of scraping mud, the connecting pin 608 between the slide bar 605 and the pull rod 606 slowly lifts the scraper lock 607 along the triangular bevel of the free end of the scraper lock 607, and finally passes over the triangular vertex. Under the action of gravity, the scraper lock 607 falls down and locks the connecting pin 608 in the triangular straight edge of the free end of the scraper lock 607, so that the scraper 602 will not turn over due to the increase of the resistance to scraping mud; the upper end of the scraper lock 607 is equipped with an unlocking roller 609,

[0048] When starting to scrape the mud, the traction chain 2 pulls the slide bar 605 to slide to one side, and drives the scraper 602 to rotate and close through the pull rod 606. At this time, the slide bar 605 reaches the stroke limit; when the traction chain 2 continues to pull, the slide bar 650 and the trolley frame 601 no longer slide relative to each other, so that the entire trolley scraper assembly 6 runs together in the direction of the mud pit, and the same applies to the opposite direction.

[0049] like Figure 8 As shown, the traction chain 2 passes through the fourth redirecting wheel group 404, the second redirecting wheel group 402, the first redirecting wheel group 401, the driving sprocket 105, the third redirecting wheel group 403, and the front end of the trolley scraper assembly 6 in sequence from the rear end of the trolley scraper assembly 6 to realize a closed-loop connection; in order to prevent the traction chain 2 from falling directly on the mud and sand layer at the bottom of the pool and sliding friction over the entire pool length, the part of the traction chain 2 between the front end of the trolley scraper assembly 6 and the third redirecting wheel group 403, and the rear end of the trolley scraper assembly 6 and the fourth redirecting wheel group 404 is supported by the wear-resistant slide groove 504 in the track assembly 5.

[0050] Furthermore, if Figure 5As shown, the reducer 104 is connected to a bidirectional overload protection device 107, and the bidirectional overload protection device 107 includes an inner height adjustable fixed sleeve 107-1, and an upper movable sleeve 107-2 and a lower movable sleeve 107-3 are arranged in the inner height adjustable fixed sleeve 107-1, and a compression spring 107-4 is arranged in the upper movable sleeve 107-2 and the lower movable sleeve 107-3, and one end of a screw rod 107-5 is arranged to pass through the compression spring 107-4 and be fixed to the drive seat 101, and the other end of the screw rod 107-5 is fixedly connected to the reducer On the machine ear seat 109, the screw rod 107-5 is also fixedly provided with a sensor fixing seat 107-6, and the sensor fixing seat 107-6 is provided with a normally open type proximity switch 107-7. The position of the angle steel 101-1 of the drive seat 101 relative to the normally open type proximity switch 107-7 can be fixed by welding with an adjustable position sensing piece 107-8, and the adjustable position sensing piece 107-8 is divided into two pieces, upper and lower, corresponding to the upper and lower overloads respectively; the drive seat 101 is provided with a driving cover 108 for covering the entire drive device 1. When the reducer 104 is pressed down, the screw rod 107-5 moves downward, driving the upper movable sleeve 107-2 downward, and the spring 107-4 is compressed; when the reducer 104 is pulled up, the screw rod 107-5 moves upward, driving the lower movable sleeve 107-3 upward, and the compression spring 107-4 is compressed. A proximity switch 107-7 is installed on the screw rod 107-5, and the normally open proximity switch 107-7 is connected to the programmable logic controller PLC; opposite the proximity switch 107-7, two upper and lower position adjustable induction plates 107-8 are fixed, and the position of the induction plate is adjustable in a small range, and the overload torque value is set according to the compression amount of the compression spring 107-4. At the same time, the drive sprocket 105 is connected to the shear pin 110 for protection, and its over-torque setting value is greater than the maximum value of the two-way overload protection device 107, and less than the rated torque of the motor and reducer, as the last level of protection; in addition, a motor thermal relay protection can also be provided, and the safety performance of the equipment is greatly improved under the triple protection.

[0051] Furthermore, if Figure 2As shown, in order to easily raise the height of the drive device 1 when necessary by adjusting the screw rod and the nut to achieve the purpose of manual tensioning, the manual tensioning device includes an adjusting screw rod and an adjusting nut arranged on the drive seat 101 for adjusting the overall height of the drive device 1, and a jack limit seat 111 is arranged at the bottom of the drive seat 101, and the jack limit seat 111 can be set as a "X"-shaped slot structure; the jack limit seat 111 can be adapted to a split manual hydraulic jack for raising the height of the drive device 1. The above-mentioned manual hydraulic jack lifts the drive seat 101 as a whole at a point close to the combined force, which constitutes a fixed tensioning device for the traction chain of the scraper. The jack is a standard part mass-produced in the automotive industry, with reliable performance and low price. It is no longer necessary to install a manual gate fixed tensioning device extending from the ground to the bottom of the pool at the other end of the sedimentation tank.

[0052] Furthermore, if Figures 6-7 As shown, in order to realize automatic tensioning of the trolley scraper assembly 6 during the return process, the flap-type monorail scraper is also provided with a pendulum tensioning device 3, and the pendulum tensioning device 3 is arranged on the water inlet end wall below the driving device 1, and the pendulum tensioning device 3 includes a fixed seat 301 fixedly arranged on the pool wall, and a swing frame 302 is movably connected to the fixed seat 301, and the swing frame 302 is connected to the column on the top of the pool through a limiting zipper 305, and one end of the swing frame 302 is fixedly provided with a rope pressing wheel 303 for pressing the traction chain 2, and counterweights 304 are arranged at both ends of the rope pressing wheel 303.

[0053] Furthermore, if Figure 8 As shown, in order to realize the automatic tensioning of the loose side of the traction chain during the scraping process, the traction chain 2 is a large-span suspension structure between the first redirecting wheel set 401 and the second redirecting wheel set 402. When the span is large, a supporting pulley can be added. This large-span suspension structure is in a sagging state during the equipment scraping process and provides tensioning force on the loose side. The chain suspended with a large span is designed and calculated by the catenary. When the length change caused by sagging is ensured not to interfere with the operation of the trolley, when the pool length is long, a supporting wheel can be added in the middle to reduce the sagging height of the catenary, and keep it close to the chain length change under the extreme position tensioning action provided by the pendulum tensioning device 3, so that when the limit zipper 305 of the pendulum tensioning device 3 is in a taut state, the positive and negative tensioning actions are both in the extreme position. At this time, it is only necessary to adjust the height of the driving device 1 to enable each tensioning system to continue to operate stably.

[0054] Furthermore, in order to fix the steering wheel hollow shaft 409 and the support sleeve 406 as a stable and reliable whole under the locking force of the long bolts 410 and the nuts and washers, the steering wheel 407 and the steering wheel bushing 408 can be installed on the steering wheel hollow shaft 409 and rotate freely, and the axial length of the steering wheel hollow shaft 409 is slightly smaller than the distance between the outer end faces of the two support sleeves 406. Under the locking force of the long bolts and the nuts and washers, the end distance will be reduced inward to the same as the axial length of the steering wheel hollow shaft 409. At this time, there is a locking force on the steering wheel hollow shaft 409 and the outer end faces of the support sleeve 406. Due to the existence of static friction, the relative freedom of the long bolts, the steering wheel hollow shaft 409, and the support sleeve 406 is 0, and they are fixed as a stable and reliable whole.

[0055] Furthermore, if Figures 10-12 As shown, in order to buffer the impact force generated by the over-travel operation of the trolley scraper assembly 6, buffer rubber heads 502 are provided at both ends of the guide rail 501; in order to facilitate sealing the gap between the wear-resistant slide groove 504 and the two guide rails 501, a guide rail sealing plate 505 is also provided between the guide rails 501.

[0056] Furthermore, if Fig.13 As shown, in order to make the scraper 602 turn over more smoothly, a scraper counterweight 610 is provided above the scraper 602 to ensure that the torque of the scraper assembly's own weight on the rotation center is close to 0 at any angle.

[0057] Furthermore, if Fig.15 As shown, in order to compensate for the large gap between the bottom of the pool and the scraper caused by the error of civil construction, an adjustable rubber scraper 619 is provided at the lower end of the scraper 602. Since the active sludge in the secondary sedimentation tank requires the scraper to scrape thoroughly, if the gap between the bottom of the pool and the scraper is large, the sludge will exist for a long time somewhere, the activity of the biological strains will disappear, and finally float to the surface, affecting the sedimentation.

[0058] Furthermore, if Fig.14 As shown, in order to better scrape off the dirt between the guide rails 501, the four traveling wheels of the trolley frame 601 are fixedly provided with a first front oblique scraper 613, a second front oblique scraper 614, a first rear oblique scraper 615, and a second rear oblique scraper 616 in front and rear; the front and rear ends of the trolley frame 601 are also fixedly provided with a front scraper 617 and a rear scraper 618.

[0059] Of course, in order to realize the automatic operation of the equipment, a control box can also be set up to install some electronic control equipment. The electronic control equipment can use a programmable logic controller PLC, as well as some conventional electrical components, such as thermal relays, intermediate relays, contactors, circuit breakers, switches, etc.; the rotary encoder counter 106 and the normally open proximity switch 107-7 are all connected to the PLC, and the reducer 104 is controlled by the PLC. The PLC controls the start, stop and reverse of the reducer 104 through the circuit breaker and contactor, etc., to jointly realize the stroke and reversing control of the trolley scraper combination 6.

[0060] The reciprocating stroke of the scraper is realized by the rotary encoder counter 106 installed at the end of the drive shaft 103. When the equipment is debugged for the first time, the trolley scraper assembly 6 is run in the scraping direction until it hits the buffer rubber head 502 of the guide rail 501, and the two-way overload protection device 107 is triggered, and the equipment stops. At this time, the encoder reading in the PLC is cleared, and then the trolley scraper assembly 6 is run in the reverse direction for return, and the PLC starts to record the encoder reading. When the trolley scraper assembly 6 returns and hits the buffer rubber head 502 at the other end, the two-way overload protection device 107 is triggered, and the equipment stops. The encoder reading in the PLC is observed at this time and recorded as the maximum stroke. After that, the starting and end values ​​of the trolley scraper assembly 6 can be taken between the PLC encoder reading 0 value and the maximum stroke value according to actual requirements, and the PLC program can be written according to the actual mud distribution in the sedimentation tank to realize multiple scraping methods with different strokes, which not only saves multiple trolley position sensors, but also has rich customization space.

[0061] The tensioning system of the scraper is divided into two parts: automatic tensioning and manual tensioning. The automatic tensioning of the scraping process is completed by the large-span catenary between the first redirecting wheel group 401 and the second redirecting wheel group 402. The automatic tensioning of the return process is completed by the pendulum tensioning device 3 installed on the water inlet end face. The drooping limit position of the large-span catenary is controlled by the catenary calculation model to control its chain extension to be the same as the chain extension at the limit position of the pendulum tensioning device 3, and it will not interfere with the operation of the trolley scraper assembly 6. The limit position of the pendulum tensioning device 3 also needs to be confirmed. To ensure that the chains going up and down do not interfere with each other, when the pendulum tensioning device 3 is in the limit position, the limit zipper 305 installed thereon is straightened, and the daily patrol personnel can directly observe the state of the limit zipper 305 being straightened on the top of the pool. At this time, it is only necessary to open the drive cover 108, loosen the nuts at the four corners of the drive seat 101, place the manual split hydraulic jack at the jack limit seat position under the drive seat 101, press the jack to raise the drive device 1, and achieve the purpose of manual tensioning. Finally, remove the jack, tighten the nuts, and cover the drive cover 108. This tensioning method is not only simple and reliable, but also saves the floor space for installing the manual hoist.

[0062] The opening and closing of the scraper 602 of the trolley scraper assembly 6 is completed by the pulling force of the traction chain 2. There is a movable slide bar 605 on the trolley scraper assembly 6. The slide bar 605 is arranged in the 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 and right ends of the slide bar 605 are connected to the traction chain 2. When the traction chain 2 is pulled in different directions, the slide bar 605 slides in the corresponding direction. When the slide bar 605 slides to the limit, the traction chain 2 continues to pull and the slide bar 605 moves together with the trolley scraper assembly 6.

[0063] The slide bar 605 is free to move in the forward and backward directions relative to the trolley. Therefore, when the slide bar moves, the friction between the slide bar 605 and the fixed sleeve 611 is not enough for the trolley to overcome its own friction and move. The fixed sleeve 611 has two concentrically symmetrical parts, which respectively support the left and right sections of the slide bar 605. There is a circle of limiting ring 612 in the middle of the slide bar 605. When the slide bar 605 moves in one direction, the limiting ring 612 will approach the fixed sleeve 611 at one end. When the limiting ring 612 collides with the fixed sleeve 611, the limiting ring 612 continues to be pulled so that the limiting ring 612 pushes the fixed sleeve 611 to further drive the trolley to move.

[0064] The slide bar 605 is connected to the lower end of the scraper 602 through a hinged pull rod 606, and the upper end of the scraper 602 is hinged to the trolley frame 601. The pull rod 606 can make the horizontal movement of the slide bar 605 drive the scraper 602 to rotate along the hinge point on the trolley frame 601, thereby achieving the opening and closing action of the scraper 602.

[0065] Through mechanical model calculation, it is ensured that when the scraper 602 is switched, the carriage frame 601 will not move. The scraper lock 607 on the trolley frame 601 has one end hinged on the trolley frame 601 and the other end freely falls on the trolley frame 601. The head of the free end is a right-angled triangle with the inclined surface facing downward. When the scraper 602 is about to be closed, the slide bar 605 moves to make the connecting pin 608 move along the hypotenuse of the scraper lock 607 triangle to lift the scraper lock 607. When the scraper 602 is closed, the connecting pin 608 passes over the top angle of the hypotenuse of the triangle, and the scraper lock 607 falls. Its right-angled side locks the connecting pin 608 to prevent it from sliding relatively, thereby locking the scraper 602 in a closed state; when the trolley scraper assembly 6 scrapes mud to the end of the stroke, the unlocking push rod 503 on the guide rail 501 lifts the scraper lock 607 to release the locked closed state of the scraper 602, so that when the trolley scraper assembly 6 moves in the reverse direction, the scraper 602 can be opened smoothly. This way of opening and closing the scraper 602 can make the return journey no longer limited to returning to the end position, but can return to any position to start scraping mud, which greatly improves the flexibility of the equipment and can be applied to various process occasions.

[0066] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they all fall within the protection scope of the present invention.

Claims

1. A flap-type monorail scraper, comprising a drive device (1), a traction chain (2), and a trolley scraper assembly (6), characterized in that: It also includes a redirecting wheel train (4), a track assembly (5), and a tensioning device, wherein the driving device (1) is arranged on the top of the water inlet end of the sedimentation tank, the redirecting wheel train (4) is arranged at both ends of the sedimentation tank, the traction chain (2) is sleeved on the driving device (1) and the redirecting wheel train (4) and connected to the trolley scraper assembly (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 assembly (6) is installed on the track assembly (5), and the tensioning device is composed of a manual tensioning device and an automatic tensioning device, and the automatic tensioning device is composed 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 reducer (104), a sprocket (105), a rotary encoder counter (106), and a bidirectional overload protection device (107). The driving seat (101) is fixedly arranged on the top of the water inlet end of the sedimentation tank. A pair of bearing seats (102) are fixedly arranged on the driving seat (101). The driving shaft (103) passes through the bearing seats (102). A sprocket (105) is sleeved at a position between the bearing seats on the driving shaft (103). A traction chain (2) is sleeved on the sprocket (105). The sprocket (105) is provided with a shear pin. The driving shaft (103) One end located outside the bearing seat (102) is fixedly connected to a reducer (104), and the other end is provided with a rotary encoder counter (106), and the rotary encoder counter (106) is connected to a programmable logic controller (PLC); the reducer (104) is connected to a bidirectional overload protection device (107), and the reducer (104) is controlled by the programmable logic controller (PLC); The redirecting wheel system (4) comprises a first redirecting wheel set (401) and a second redirecting wheel set (402) respectively fixedly arranged at the left and right ends of the sedimentation tank, and a third redirecting wheel set (403) and a fourth redirecting wheel set (404) respectively arranged below the first redirecting wheel set (401) and the second redirecting wheel set (402). The first redirecting wheel set (401), the second redirecting wheel set (402), the third redirecting wheel set (403) and the fourth redirecting wheel set (404) are all 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) and a nut. The steering wheel hollow shaft (409) is sleeved on the long bolt (410), the steering wheel hollow shaft (409) is sleeved on the steering wheel bushing (408), the steering wheel bushing (408) is sleeved on the steering wheel (407) and is interference fit, the two ends of the steering wheel hollow shaft (409) are sleeved with support sleeves (406), the axial length of the steering wheel hollow shaft (409) is slightly smaller than the distance between the outer end surfaces of the two support sleeves (406); the support sleeve (406) is fixed to the long bolt (410) by a washer and a nut, the nut is prevented from loosening by a cotter pin, and the support sleeve (406) is welded to the steering wheel bracket (405); The track assembly (5) comprises a guide rail (501), one end of the guide rail (501) located at the mud pit of the sedimentation tank is fixedly provided with an unlocking push rod (503) with an inclined surface, and a wear-resistant slide groove (504) is also provided between the guide rails (501); The trolley scraper assembly (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 to the trolley frame (601), an adjustable rubber scraper (619) is fixedly arranged below the scraper (602), a walking wheel (603) in contact with the track surface of the guide rail (501) is arranged at the bottom of the trolley frame (601), and a sliding rod pull rod group is also arranged on the trolley frame (601), the sliding rod (605) of the sliding rod pull rod group is arranged in two fixed sleeves (611) of the trolley frame (601), and a limit ring (612) is arranged on the sliding rod (605). The two ends of the rod (605) are connected to the traction chain (2); one end of the pull rod (606) of the slide rod pull rod group is hinged to the middle part of the slide rod (605) through a connecting pin (608), and the other end is hinged to the middle part of the lower end of the scraper (602); a scraper lock (607) is also provided on the trolley frame (601); one end of the scraper lock (607) is hinged to the trolley frame (601), and the other end falls freely on the trolley frame (601); the free end of the scraper lock (607) is a right-angled triangle with the inclined surface facing downward, and the scraper lock (607) is located above the connecting pin (608); the upper end of the scraper lock (607) is provided with an unlocking roller (609); The traction chain (2) passes through the fourth redirecting wheel set (404), the second redirecting wheel set (402), the first redirecting wheel set (401), the driving sprocket (105), the third redirecting wheel set (403), and the front end of the trolley scraper assembly (6) in sequence from the rear end of the trolley scraper assembly (6) to realize a closed loop connection; the portion of the traction chain (2) between the front end of the trolley scraper assembly (6) and the third redirecting wheel set (403) and the rear end of the trolley scraper assembly (6) and the fourth redirecting wheel set (404) is supported by a wear-resistant slide groove (504) in the track assembly (5); The bidirectional overload protection device (107) comprises an inner height adjustable fixed sleeve (107-1), an upper movable sleeve (107-2) and a lower movable sleeve (107-3) are arranged in the inner height adjustable fixed sleeve (107-1), compression springs (107-4) are arranged in the upper movable sleeve (107-2) and the lower movable sleeve (107-3), one end of a screw rod (107-5) passes through the compression spring (107-4) and is fixed to the drive seat (101), and the other end of the screw rod (107-5) is fixedly connected to the reducer ear seat (109), A sensor fixing seat (107-6) is also fixedly arranged on the screw rod (107-5), a normally open proximity switch (107-7) is arranged on the sensor fixing seat (107-6), and the normally open 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 drive seat (101) at a position relative to the normally open proximity switch (107-7); and a drive cover (108) for covering the entire drive device (1) is arranged on the drive seat (101); The manual tensioning device comprises an adjusting screw and an adjusting nut arranged on the driving seat (101) for adjusting the overall height of the driving device (1); a jack limit seat (111) is arranged at the bottom of the driving seat (101); the jack limit seat (111) is adapted to a split manual hydraulic jack for raising the height of the driving device (1).

2. The flap-type monorail scraper according to claim 1 is characterized in that: The pendulum tensioning device (3) is arranged on the water inlet end wall below the driving device (1), and comprises a fixing seat (301) fixedly arranged on the pool wall, a swing frame (302) movably connected to the fixing seat (301), the swing frame (302) being connected to a column on the top of the pool via a limit zipper (305), a rope pressing wheel (303) for pressing the traction chain (2) being fixedly arranged at one end of the swing frame (302), and counterweights (304) being arranged at both ends of the rope pressing wheel (303).

3. The flap-type monorail scraper according to claim 1 is characterized in that: The traction chain (2) is a large-span suspension structure between the first redirecting wheel set (401) and the second redirecting wheel set (402).

4. The flap-type monorail scraper according to claim 1 is characterized in that: The axial length of the redirecting wheel hollow shaft (409) is slightly smaller than the distance between the outer end surfaces of the two support sleeves (406).

5. The flap-type monorail scraper according to claim 1 is characterized in that: Buffer rubber heads (502) are provided at both ends of the guide rail (501), and a guide rail sealing plate (505) is also provided between the guide rails (501).

6. The flap-type monorail scraper according to claim 1, characterized in that: A scraper counterweight (610) is arranged above the scraper (602).

7. The flap-type monorail scraper according to claim 1 is characterized in that: A first front oblique scraper (613), a second front oblique scraper (614), a first rear oblique scraper (615), and a second rear oblique scraper (616) are respectively fixedly provided at the front and rear ends of the four traveling wheels of the trolley frame (601); a front scraper (617) and a rear scraper (618) are also fixedly provided at the front and rear ends of the trolley frame (601).

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