A rotary trash cleaner with an automatic adjustment protection function

Abstract

A rotary trash cleaner with an automatic adjustment protection function, comprising a grid part, a trash cleaning rake and a transmission part; the grid part includes a head frame, a trash interception grid body and guide rails, the trash interception grid body is installed inside the head frame, and the guide rails are located between the trash interception grid body and the head frame; the transmission part includes a motor, a reducer, a traction chain, a traction sprocket, a drive sprocket, a drive chain and a main shaft, the motor is installed at the head of the head frame, the main shaft is rotatably installed at the upper part of the head frame, two traction sprockets are fixedly installed at both ends of the main shaft, and a drive sprocket is installed at the outermost end of the main shaft; it has a simple structure, good rigidity, stable operation, not easy to break down, simple operation and maintenance, good trash cleaning effect, high efficiency, low energy consumption, long service life, the motor is horizontally arranged inside the machine head, the motor has good protection effect, and can clean large and extra-long trash exceeding the width of the hole.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage cleaners, and more specifically to a rotary sewage cleaner with an automatic adjustment and protection function. Background Art

[0002] A rotary sewage cleaner uses a sewage cleaning rake to clean and retrieve the sewage in the water accumulated in front of the trash rack bars, gaps between the bars, and the trash rack. By rotating the sewage cleaning rake around the trash rack, it can comprehensively remove the sewage from the bottom up over the entire trash rack surface, achieving the purpose of dredging the trash rack, improving the water intake conditions, increasing the water flow rate, and enhancing the engineering efficiency. The rotary sewage cleaner is a fixed continuous sewage cleaning device that combines trash racking and sewage cleaning. It has a trash rack as the base, and a transmission device, a traction chain device, and a sewage cleaning rake are assembled on it.

[0003] Before installation, various parameters of the rotary sewage cleaner need to be calculated and determined in advance according to the actual situation, and they cannot be changed after the specific dimensions and parameters of the structure are determined. However, during use, sewage will gradually stick to the grille, causing the gap between the bars to become smaller. At this time, the flow velocity through the grille will increase and deviate from the preset value, resulting in a decline in the trash racking effect.

[0004] After long-term use, restarting after shutdown and maintenance, or when a large amount of sewage accumulates in front of the trash rack body, it will cause excessive pressure on the transmission part during the operation of the sewage cleaning rake, and even cause the main shaft to break or the chain to break. Summary of the Invention

[0005] To solve the above problems and overcome the deficiencies of the prior art, the present invention provides a rotary sewage cleaner with an automatic adjustment and protection function, which includes a grille part, a sewage cleaning rake, and a transmission part;

[0006] The grille part includes a head frame, a trash rack body, and guide rails. The trash rack body is installed inside the head frame, and the guide rails are located between the trash rack body and the head frame;

[0007] The transmission part includes a motor, a reducer, a traction chain, a traction sprocket, a drive sprocket, a drive chain, and a main shaft. The motor is installed at the head of the head frame, the main shaft is installed on the upper part of the head frame in a rotatable manner, two traction sprockets are fixedly installed at both ends of the main shaft, a drive sprocket is installed at the outermost end of the main shaft, the motor drives the reducer to rotate, the small sprocket arranged at the end of the reducer meshes with the drive sprocket through the drive chain to drive the main shaft to rotate, the traction sprocket meshes with the traction chain, and the traction chain is placed inside the guide rails in a movable manner;

[0008] Both ends of the sewage cleaning rake are connected to the traction chain and perform a rotary motion along the guide rails under the drive of the traction chain;

[0009] The trash rack body includes an oil cylinder, a moving rod, a fixed rod, moving grating bars, fixed grating bars, an inner rod and an outer cavity rod. Both ends of the fixed rod and the outer cavity rod are fixedly connected to the head frame. A number of fixed grating bars are fixedly arranged between the fixed rod and the outer cavity rod. There is a cavity inside the outer cavity rod, and the inner rod is arranged in the cavity in a rotatable manner. A number of slots are arranged on the upper surface of the outer cavity rod. A moving rod is arranged above the fixed rod, and a number of moving grating bars are fixedly arranged between the moving rod and the inner rod. A number of moving grating bars all pass through a number of slots on the outer cavity rod in one-to-one correspondence. Both ends of the moving rod are hinged to the piston rod of the oil cylinder, and the cylinder body of the oil cylinder is hinged to the head frame. The fixed grating bars and the moving grating bars are arranged at intervals.

[0010] Further, the transmission part further includes an overload protection device. The overload protection device includes a middle chain hub and a safety pin. The middle chain hub is fixedly connected to the main shaft. The middle chain hub is located inside the driving sprocket. A number of corresponding pin holes are arranged on the discs of the middle chain hub and the driving sprocket. The middle chain hub and the driving sprocket are connected by a safety pin.

[0011] The driving sprocket is connected to the main shaft in a freely rotatable manner.

[0012] A sliding bearing is arranged between the head frame and the main shaft. A toothed induction disc is arranged at one end of the main shaft away from the middle chain hub. A proximity switch is also arranged inside the head frame near the toothed induction disc.

[0013] The overload protection device further includes a control module and a relay. When the main shaft rotates driven by the driving sprocket, the toothed induction disc rotates synchronously with the main shaft. The signal sensed by the proximity switch is transmitted to the control module. The control module analyzes and calculates the input pulse signal to control the output of the relay. When mechanical overload occurs and the safety pin is cut off, the main shaft stops rotating, the continuous pulse signal is interrupted, the pulse count within the unit cycle is lower than the initial set value, the output relay acts, the normally closed contact is disconnected, and the motor stops. At the same time, the normally open contact is attracted, and the power supply of the alarm is turned on to emit a sound and light signal.

[0014] Further, the diameter of the fixed rod is equal to half of the width of the fixed grating bar, the diameter of the moving rod is equal to half of the width of the moving grating bar, and the width of the fixed grating bar is equal to the width of the moving grating bar.

[0015] Further, the slotting angle of the slot is greater than the maximum rotatable angle of the moving grating bar.

[0016] Further, the maximum length of the perpendicular line between the moving rod and the fixed grating bar is less than the minimum length of the perpendicular line between the rear traction chain and the fixed grating bar.

[0017] Further, it further includes a water depth sensor and a flow velocity sensor through the grating. The water depth sensor is located on the front side of the head frame and is used to detect the current liquid level height. The flow velocity sensor through the grating is located at the fixed grating bar and is used to detect the flow velocity of the water flowing through the trash rack body.

[0018] Furthermore, when determining the number of bar spacings of the trash rack body, the moving distance of the moving rod is determined according to the following formula:

[0019] ;

[0020] In the formula, Z is the moving distance of the moving screen at the water surface, with the unit of m;

[0021] Q is the maximum designed sewage volume, with the unit of m 3 / s;

[0022] x is the designed angle of the trash rack body, with the unit of degree;

[0023] is the actual velocity through the bars, with the unit of m / s;

[0024] V is the designed velocity through the bars, with the unit of m / s;

[0025] n is the number of bar spacings, with the unit of number;

[0026] h is the water depth in front of the bars, with the unit of m.

[0027] Furthermore, when determining the bar width and the width of the trash rack body, the moving distance of the moving rod is determined according to the following formula:

[0028] ;

[0029] In the formula, Z is the moving distance of the moving screen at the water surface, with the unit of m;

[0030] S is the bar width, with the unit of m;

[0031] Q is the maximum designed sewage volume, with the unit of m 3 / s;

[0032] x is the designed angle of the trash rack body, with the unit of degree;

[0033] is the actual velocity through the bars, with the unit of m / s;

[0034] V is the designed velocity through the bars, with the unit of m / s;

[0035] B is the width of the trash rack body, with the unit of m;

[0036] h is the water depth in front of the bars, with the unit of m.

[0037] Furthermore, after calculating the moving distance of the moving screen at the water surface according to the parameters, the moving distance of the moving rod is determined according to the following formula:

[0038] ;

[0039] In the formula, is the moving distance of the moving rod, with the unit of m;

[0040] Z is the moving distance of the moving grid at the water surface, with the unit of m;

[0041] A is the length of the moving grid bars, with the unit of m;

[0042] H is the actual water depth, with the unit of m;

[0043] c is the distance between the inner rod and the bottom of the water, with the unit of m;

[0044] x is the designed angle of the trash rack body, with the unit of degree.

[0045] The beneficial effects of the present invention are as follows:

[0046] This device has a simple structure, good rigidity, stable operation, is not prone to failure, is simple to operate and maintain, has good sewage cleaning effect, high efficiency, low energy consumption, and long service life. The motor is horizontally arranged inside the machine head, and the motor has good protection effect. It can clean large and extra-long sewage that exceeds the width of the hole. An overload protection device is set, which can protect the motor and other structures during overload. At the same time, the replacement of the safety pin is more rapid and does not affect the normal use of the whole machine.

[0047] A movable moving grid bar is set, which can adjust the grid bar gap according to the actual flow velocity through the grid, and then adjust the flow velocity through the grid to ensure the sewage cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is the structural schematic diagram of the present invention;

[0049] Figure 2 is the front view structural schematic diagram of the trash rack body of the present invention;

[0050] Figure 3 is the side view structural schematic diagram of the trash rack body of the present invention;

[0051] Figure 4 is the upper part structural schematic diagram of the trash rack body of the present invention;

[0052] Figure 5 is the structural schematic diagram of the overload protection device of the trash rack body of the present invention;

[0053] Figure 6 is the structural schematic diagram of the gear tooth induction disc and proximity switch of the trash rack body of the present invention;

[0054] Figure 7 is the principle schematic diagram of the overload protection device of the trash rack body of the present invention;

[0055] In the attached drawings: 1. Transmission device; 2. Reducer; 3. Dirt cleaning device; 4. Fixed hinge; 5. Traction chain; 6. Rotary tooth rake; 7. Trash rack body; 8. Bottom auxiliary trash rack; 9. Moving rod; 10. Moving grating bar; 11. Fixed rod; 12. Fixed grating bar; 13. First bearing; 14. Inner rod; 15. Outer cavity rod; 16. Oil cylinder; 17. Fixed notch; 18. Moving notch; 19. Electric motor; 20. Small sprocket; 21. Adjusting bearing support; 22. Sliding bearing; 23. Overload protection device; 24. Traction sprocket; 25. Main shaft; 26. Proximity switch; 27. Tooth induction disc; 28. Driving sprocket; 29. Middle chain hub; 30. Safety pin; 31. Safety pin baffle; 32. Baffle fixing bolt; 33. Retaining ring; 34. Retaining ring fastening bolt; 35. Shaft end retaining ring; 36. Shaft end retaining ring bolt. Specific implementation mode

[0056] To make the purpose, technical solutions and advantages of the implementation of the present invention clearer, the following will combine the attached drawings of the present invention Figure 1 ~ attached drawings Figure 7 to describe the present invention in more detail.

[0057] A rotary sewage cleaner with an automatic adjustment protection function provided by the present invention includes a grid part, a sewage cleaning tooth rake and a transmission part; the grid part includes a head frame, a trash rack 7 and a guide rail, the trash rack 7 is installed inside the head frame, and the guide rail is located between the trash rack 7 and the head frame; the transmission part includes a motor 19, a reducer 2, a traction chain 5, a traction sprocket 24, a driving sprocket 28, a driving chain and a main shaft 25, the motor 19 is installed at the head of the head frame, the main shaft 25 is installed on the upper part of the head frame in a rotatable manner, two traction sprockets 24 are fixedly installed at both ends of the main shaft 25, a driving sprocket 28 is installed at the outermost end of the main shaft 25, the motor 19 drives the reducer 2 to rotate, and a small sprocket 20 arranged at the end of the reducer 2 is engaged with the driving sprocket 28 through the driving chain to drive the main shaft 25 to rotate, the traction sprocket 24 is engaged with the traction chain 5, and the traction chain 5 is placed inside the guide rail in a movable manner; both ends of the sewage cleaning tooth rake are connected with the traction chain 5 and perform a rotary motion along the guide rail under the drive of the traction chain 5; the trash rack 7 includes an oil cylinder 16, a moving rod 9, a fixed rod 11, a moving grid bar 10, a fixed grid bar 12, an inner rod 14 and an outer cavity rod 15, both ends of the fixed rod 11 and the outer cavity rod 15 are fixedly connected with the head frame, and a plurality of fixed grid bars 12 are fixedly arranged between the fixed rod 11 and the outer cavity rod 15; a cavity is arranged inside the outer cavity rod 15, the inner rod 14 is arranged inside the cavity in a rotatable manner, a plurality of slots are arranged on the upper surface of the outer cavity rod 15, a moving rod 9 is arranged above the fixed rod 11, and a plurality of moving grid bars 10 are fixedly arranged between the moving rod 9 and the inner rod 14, and a plurality of moving grid bars 10 all pass through a plurality of slots on the outer cavity rod 15 in a one-to-one correspondence; both ends of the moving rod 9 are hinged with the piston rod of the oil cylinder 16, the cylinder body of the oil cylinder 16 is hinged with the head frame, and the fixed grid bars 12 and the moving grid bars 10 are arranged at intervals; the transmission part further includes an overload protection device 23, the overload protection device 23 includes a middle chain hub 29 and a safety pin 30, the middle chain hub 29 is fixedly connected with the main shaft 25, the middle chain hub 29 is located inside the driving sprocket 28, a plurality of corresponding pin holes are arranged on the disk surfaces of the middle chain hub 29 and the driving sprocket 28, and the middle chain hub 29 and the driving sprocket 28 are connected through the safety pin 30; the driving sprocket 28 is connected with the main shaft 25 in a freely rotatable manner; a sliding bearing 22 is arranged between the head frame and the main shaft 25, a toothed induction disk is arranged at one end of the main shaft 25 far from the middle chain hub 29, and a proximity switch 26 is also arranged at a position in the head frame close to the toothed induction disk; the overload protection device 23 further includes a control module and a relay, when the main shaft 25 rotates under the drive of the driving sprocket 28, the toothed induction disk rotates synchronously with the main shaft 25, the signal sensed by the proximity switch 26 is transmitted to the control module, and the control module analyzes and calculates the input pulse signal to control the output of the relay;When a mechanical overload occurs, the safety pin 30 is sheared off, the main shaft 25 stops rotating, the continuous pulse signal is interrupted, the pulse count within the unit cycle is lower than the initial set value, the output relay operates, the normally closed contact is disconnected, and the motor 19 stops; at the same time, the normally open contact is attracted, the power supply of the alarm is turned on to emit a sound and light signal; the diameter of the fixed rod 11 is equal to half of the width of the fixed grid bar 12, the diameter of the moving rod 9 is equal to half of the width of the moving grid bar 10, and the width of the fixed grid bar 12 is equal to the width of the moving grid bar 10; the grooving angle of the grooving is greater than the maximum rotatable angle of the moving grid bar 10; the maximum length of the perpendicular line between the moving rod 9 and the fixed grid bar 12 is less than the minimum length of the perpendicular line between the rear traction chain 5 and the fixed grid bar 12; it also includes a water depth sensor and a flow velocity sensor passing through the grid. The water depth sensor is located at the front side of the headstock and is used to detect the current liquid level height; the flow velocity sensor passing through the grid is located at the fixed grid bar 12 and is used to detect the flow velocity of the water flowing through the trash rack body 7 at present.

[0058] When determining the number of grid bar intervals of the trash rack body 7, the moving distance of the moving rod 9 is determined according to the following formula:

[0059] ;

[0060] In the formula, Z is the moving distance of the moving grid at the water surface, with the unit of m;

[0061] Q is the maximum designed sewage volume, with the unit of m 3 / s;

[0062] x is the designed angle of the trash rack body 7, with the unit of degree;

[0063] is the actual flow velocity passing through the grid, with the unit of m / s;

[0064] V is the designed flow velocity passing through the grid, with the unit of m / s;

[0065] n is the number of grid bar intervals, with the unit of piece;

[0066] h is the water depth in front of the grid, with the unit of m.

[0067] When determining the grid bar width and the width of the trash rack body 7, the moving distance of the moving rod 9 is determined according to the following formula:

[0068] ;

[0069] In the formula, Z is the moving distance of the moving grid at the water surface, with the unit of m;

[0070] S is the grid bar width, with the unit of m;

[0071] Q is the maximum designed sewage volume, with the unit of m 3 / s;

[0072] x is the design angle of the trash rack body 7, with the unit of degree;

[0073] is the actual flow velocity through the rack, with the unit of m / s;

[0074] V is the designed flow velocity through the rack, with the unit of m / s;

[0075] B is the width of the trash rack body 7, with the unit of m;

[0076] h is the water depth in front of the rack, with the unit of m.

[0077] After calculating the moving distance of the moving grid at the water surface according to the parameters, the moving distance of the moving rod 9 is determined according to the following formula:

[0078] ;

[0079] In the formula, is the moving distance of the moving rod 9, with the unit of m;

[0080] Z is the moving distance of the moving grid at the water surface, with the unit of m;

[0081] A is the length of the moving grid bar 10, with the unit of m;

[0082] H is the actual water depth, with the unit of m;

[0083] c is the distance between the inner rod 14 and the bottom of the water, with the unit of m;

[0084] x is the design angle of the trash rack body 7, with the unit of degree.

[0085] The embodiments of the present invention are as follows:

[0086] A rotary trash cleaner with an automatic adjustment protection function includes a grid body part, a trash cleaning tooth rake and a transmission part;

[0087] The grid body part includes a head frame, a trash rack body 7 and a guide rail. The trash rack body 7 is installed inside the head frame, and the guide rail is located between the trash rack body 7 and the head frame;

[0088] The head frame is composed of H-shaped steel welded. Two H-shaped steels are located on both sides, and the middle part is welded and connected by a transverse H-shaped steel to form an overall frame;

[0089] Then, several H-shaped steels are arranged horizontally and welded to the guide rail to form a chain operation frame.

[0090] The chain operation frame is located inside the overall frame.

[0091] The head frame formed by welding just now is installed at the upper end of the overall frame, and a motor 19, a reducer 2, a main shaft 25, a driving sprocket 28 and an overload protection device 23 are installed inside the head frame.

[0092] A driven sprocket wheel is provided at the lower end of the overall framework. Meanwhile, a bottom auxiliary trash rack is provided at the very bottom of the overall framework. The bottom auxiliary trash rack includes an installation framework. The front longitudinal section of the installation framework is a structure with both sides bulging upward and the middle concave downward. The bulging parts are connected to the overall framework. The rotary rake 6 passes through the concave part in the middle. The lateral longitudinal section of the installation framework is an L-shaped structure, and auxiliary trash rack bars are installed at the front end of the bottom. The walking track of the outermost end of the rotary rake 6 during operation is located inside the concave part. The bottom auxiliary trash rack does not affect the normal operation of the rotary rake 6.

[0093] Meanwhile, the bottom auxiliary trash rack also plays a supporting role.

[0094] The transmission part includes a motor 19, a speed reducer 2, a traction chain 5, a traction sprocket wheel 24, a driving sprocket wheel 28, a driving chain, and a main shaft 25. The motor 19 is installed on the head framework. The main shaft 25 is installed on the head framework in a rotatable manner. A sliding bearing 22 is provided between the head frame and the main shaft 25, making the operation smoother. Two traction sprocket wheels 24 are fixedly installed at both ends of the main shaft 25 and are located inside the sliding bearing 22 at the same time. A driving sprocket wheel 28 is installed at the outermost end of the main shaft 25 and is located outside the sliding bearing 22 at the same time. The motor 19 drives the speed reducer 2 to rotate. The small sprocket wheel 20 provided at the end of the speed reducer 2 meshes with the driving sprocket wheel 28 through the driving chain to drive the main shaft 25 to rotate. The traction sprocket wheel 24 meshes with the traction chain 5, and the traction chain 5 is placed inside the guide rail in a movable manner;

[0095] The transmission part further includes an overload protection device 23. The overload protection device 23 includes a middle chain hub 29, a safety pin 30, a safety pin baffle 31, a baffle fixing bolt 32, a retaining ring 33, a retaining ring fastening bolt 34, a shaft end retaining ring 35, and a shaft end retaining ring bolt 36. The middle chain hub 29 is fixedly connected to the main shaft 25. The driving sprocket wheel 28 is installed on the middle chain hub 29 in a rotatable manner. Meanwhile, the protection disc of the middle chain hub 29 is located inside the driving sprocket wheel 28. A number of corresponding pin holes are provided on the disc surfaces of the protection disc and the driving sprocket wheel 28. The middle chain hub 29 and the driving sprocket wheel 28 are connected by the safety pin 30, enabling the middle chain hub 29 to rotate with the driving sprocket wheel 28 and drive the main shaft 25 to rotate at the same time;

[0096] After the safety pin 30 is inserted into the pin hole, it needs to be limited. A safety pin baffle 31 is provided on the disc surface of the driving sprocket wheel 28. The safety pin baffle 31 is fixed on the driving sprocket wheel 28 through the baffle fixing bolt 32, which can prevent the safety pin 30 from loosening.

[0097] In order to limit the driving sprocket 28, a retaining ring 33 is provided at the outer end of the middle chain hub 29. The retaining ring 33 is sleeved on the middle chain hub 29. At the same time, a retaining ring fastening bolt 34 is installed on the retaining ring 33 to make it tightly connected to the middle chain hub 29, and it is also convenient for disassembly.

[0098] A toothed induction disc is provided at one end of the main shaft 25 away from the middle chain hub 29, and a proximity switch 26 is also provided at a position in the head frame close to the toothed induction disc;

[0099] The overload protection device 23 further includes a control module and a relay. When the main shaft 25 rotates under the drive of the driving sprocket 28, the toothed induction disc rotates synchronously with the main shaft 25, and the signal sensed by the proximity switch 26 is transmitted to the control module. The control module analyzes and calculates the input pulse signal through the single-chip microcomputer AT89C52 to control the output of the relay; when the mechanical overload safety pin 30 is cut off, the main shaft 25 stops rotating, the continuous pulse signal is interrupted, the pulse count within the unit cycle is lower than the initial set value, the output relay acts, the normally closed contact is disconnected, and the motor 19 stops; at the same time, the normally open point is attracted, the alarm power supply is turned on, and an audible and visual signal is emitted.

[0100] In actual operation, it is carried out in the following manner:

[0101] A. After completing the necessary equipment inspections, close the circuit breaker 4QF of the control module power switch and the main power switch. At this time, the module is not powered.

[0102] B. Press the start button of the dirt cleaner. At this time, the dirt cleaner rotates forward, the control module is powered on, the single-chip microcomputer program runs, and the indicator light of the proximity switch 26 installed on the main shaft 25 will flash.

[0103] C. Once the dirt cleaner's tooth rake gets stuck, the dirt cleaner is overloaded, the safety pin 30 is cut off, and the main shaft 25 stops rotating. The output point of the control module is disconnected, the motor contactor is disconnected, the motor 19 stops, and at the same time, the normally open point of the module closes, the alarm sounds and self-holds, the motor 19 stops, and the module power supply is cut off.

[0104] D. Handling method: At this time, the operator should check which dirt cleaner is overloaded, press the emergency stop button to stop the alarm, check whether the tooth rake of the dirt cleaner is stuck, and eliminate mechanical faults, and replace the safety pin 30. If the dirt cleaner needs to be jogged during the process of replacing the safety pin 30, the control module power switch 4QF should be disconnected and then closed when it is running normally. In addition, if the motor protector and the thermal protection relay are overloaded, the alarm will also sound, and the disarming method is the same.

[0105] Both ends of the dirt cleaning tooth rake are connected to the traction chain 5 and perform a rotary motion along the guide rail under the drive of the traction chain 5; Two traction chains 5 are provided, the upper ends are meshed with the traction sprockets 24, and the lower ends are meshed with the driven sprockets.

[0106] A dirt combing device 3 is also provided on the rear side of the head frame, which includes a dirt combing frame, which is mounted on the head frame by bolts, and a dirt combing plate installed on the dirt combing frame. The dirt combing plate is vertically arranged, and is provided with slots on the dirt combing plate corresponding to the teeth on the cleaning tooth rake. Rubber pads with gaps are installed in the slots. When the cleaning tooth rake rotates, the rake teeth will pass through the slots and pass through the gaps of the rubber pads. At this time, the dirt on the rake teeth will be cleaned up by the rubber pads.

[0107] A conveyor is also provided below the head frame. The conveyor is installed on the ground foundation. The sewage in the trough lifted by the cleaning tooth rake will fall onto the conveyor belt of the conveyor under the action of gravity after passing through the head frame.

[0108] The installation of the garbage cleaning machine is connected by several fixing parts, including a fixed hinge 4, one end of which is hinged to the overall frame and fixed on the ground foundation; including a fastening seat and side fixings, which are respectively installed on the front side and two side surfaces of the overall frame, and the other end is fixedly connected to the ground foundation to fix the garbage cleaning machine on the ground foundation.

[0109] The trash rack body 7 includes an oil cylinder 16, a moving rod 9, a fixed rod 11, a moving grid 10, a fixed grid 12, an inner rod 14 and an outer cavity rod 15. Both ends of the fixed rod 11 and the outer cavity rod 15 are fixedly connected to the overall frame. A plurality of fixed grids 12 are fixedly arranged between the fixed rod 11 and the outer cavity rod 15; a cavity is provided inside the outer cavity rod 15, and an inner rod 14 is rotatably provided inside the cavity. The inner rod 14 and the outer cavity rod 15 are connected by a bearing. The upper surface of the outer cavity rod 15 is provided with a plurality of slots, and the number of slots is the same as that of the moving rod 9. The number of bars 10 is the same and corresponds one to one. A movable rod 9 is arranged above the fixed rod 11. A plurality of movable bars 10 are fixedly arranged between the movable rod 9 and the inner rod 14. The plurality of movable bars 10 pass through a plurality of slots on the outer cavity rod 15 in a one-to-one manner. When the movable rod 9 moves, it can drive the movable bars 10 to rotate together; the two ends of the movable rod 9 are hinged to the piston rod of the cylinder 16, and the cylinder body of the cylinder 16 is hinged to the overall frame. The movable rod 9 is pushed to move by the cylinder 16, and the fixed bars 12 and the movable bars 10 are arranged at intervals.

[0110] The diameter of the fixed rod 11 is equal to half of the width of the fixed grid bar 12. A fixed notch 17 is provided on the side of the fixed grid bar 12 facing the movable grid bar 10. The diameter of the movable rod 9 is equal to half of the width of the movable grid bar 10. A movable notch 18 is provided on the side of the movable grid bar 10 facing the fixed grid bar 12. The width of the fixed grid bar 12 is equal to the width of the movable grid bar 10. When the movable grid bar 10 and the fixed grid bar 12 are in the initial position, the movable grid bar 10 and the fixed grid bar 12 completely overlap when viewed from the side angle. The fixed rod 11, the movable rod 9, the movable grid bar 10 and the fixed grid bar 12 do not interfere with each other through the movable notch 18 and the fixed notch 17. When the movable grid bar 10 rotates, the movable grid bar 10 rotates backward, and the maximum length of the perpendicular line between the movable rod 9 and the fixed grid bar 12 is less than the minimum length of the perpendicular line between the rear traction chain 5 and the fixed grid bar 12, which does not affect the rotary movement of the rotary rakes 6 on the front and rear sides.

[0111] A number of sensors including a water depth sensor and a flow velocity sensor across the grid are also installed. The water depth sensor is located on the front side of the head frame and is used to detect the current liquid level height. The flow velocity sensor across the grid is located at the fixed grid bar 12 and is used to detect the flow velocity of the water flowing through the trash rack body 7.

[0112] During use, dirt will gradually stick to the grille, causing the gap between the grid bars to become smaller. At this time, the flow velocity across the grid will increase and deviate from the preset value, resulting in a decline in the trash racking effect. At this time, the movable rod 9 is driven by the oil cylinder 16 to move, so that the movable grid bar 10 moves backward, and then the actual gap between the movable grid bar 10 and the fixed grid bar 12 will change, thereby controlling the flow velocity across the grid in real time. By analyzing the data transmitted back by the flow velocity sensor across the grid, the actual gap is continuously adjusted until the flow velocity across the grid returns to the designed flow velocity across the grid.

[0113] When determining the number of grid bar intervals of the trash rack body 7, the moving distance of the movable rod 9 is determined according to the following formula:

[0114] ;

[0115] In the formula, Z is the moving distance of the movable grid at the water surface, with the unit of m;

[0116] Q is the maximum designed sewage volume, with the unit of m 3 / s;

[0117] x is the designed angle of the trash rack body 7, with the unit of degree;

[0118] is the actual flow velocity across the grid, with the unit of m / s;

[0119] V is the designed flow velocity across the grid, with the unit of m / s;

[0120] n is the number of grid bar intervals, with the unit of piece;

[0121] The depth of water in front of the grid is h, with the unit of m.

[0122] Furthermore, when determining the width of the grid bars and the width of the trash rack body, the moving distance of the moving rod 9 is determined according to the following formula:

[0123] ;

[0124] In the formula, Z is the moving distance of the moving grid at the water surface, with the unit of m;

[0125] S is the width of the grid bars, with the unit of m;

[0126] Q is the maximum designed sewage volume, with the unit of m 3 / s;

[0127] x is the designed angle of the trash rack body 7, with the unit of degree;

[0128] is the actual flow velocity through the grid, with the unit of m / s;

[0129] V is the designed flow velocity through the grid, with the unit of m / s;

[0130] B is the width of the trash rack body 7, with the unit of m;

[0131] The depth of water in front of the grid is h, with the unit of m.

[0132] Furthermore, after calculating the moving distance of the moving grid at the water surface according to the parameters, the moving distance of the moving rod 9 is determined according to the following formula:

[0133] ;

[0134] In the formula, is the moving distance of the moving rod 9, with the unit of m;

[0135] Z is the moving distance of the moving grid at the water surface, with the unit of m;

[0136] A is the length of the moving grid bars 10, with the unit of m;

[0137] H is the actual water depth, with the unit of m;

[0138] c is the distance between the inner rod 14 and the bottom of the water, with the unit of m;

[0139] x is the designed angle of the trash rack body 7, with the unit of degree.

[0140] The flow velocity through the grid is controlled in real time. By analyzing the data transmitted back by the flow velocity sensor through the grid, the actual grid bar gap is continuously adjusted until the flow velocity through the grid resumes to the designed flow velocity through the grid.

[0141] In actual operation, Example 1 with specific usage scenarios is set as follows:

[0142]

[0143] Substitute the above values into the formula

[0144] ;

[0145] The moving distance Z of the moving grid at the water surface can be obtained to be approximately 0.074 m.

[0146] Substitute the above values into the formula

[0147] ;

[0148] The moving distance of the moving rod 9 can be obtained to be approximately 0.146 m.

[0149] In actual operation, Example 2 with specific usage scenarios is set as follows:

[0150]

[0151] Substitute the above values into the formula

[0152] ;

[0153] The moving distance Z of the moving grid at the water surface can be obtained to be approximately 0.046 m.

[0154] Substitute the above values into the formula

[0155] ;

[0156] The moving distance of the moving rod 9 can be obtained to be approximately 0.09 m.

[0157] According to the moving distance of the moving rod 9 calculated in the above manner, after operation, the real flow velocity through the grid is monitored in real time by the flow velocity sensor through the grid, and at the same time, it is compared with the designed flow velocity through the grid. Real-time fine-tuning is carried out through the above formula calculation until the actual flow velocity through the grid is completely consistent with the designed flow velocity through the grid.

[0158] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary garbage cleaning machine with automatic adjustment and protection function, characterized by: It includes the grid body part, the cleaning tooth rake and the transmission part; The rack body part includes a head frame, a trash rack body and a guide rail, the trash rack body is installed inside the head frame, and the guide rail is located between the trash rack body and the head frame; The transmission part includes a motor, a reducer, a traction chain, a traction sprocket, a drive sprocket, a drive chain and a main shaft, the motor is mounted on the head of the head frame, the main shaft is rotatably mounted on the upper part of the head frame, two traction sprockets are fixedly mounted on both ends of the main shaft, and one drive sprocket is mounted on the outermost end of the main shaft. The motor drives the reducer to rotate, and the small sprocket arranged at the end of the reducer engages with the drive sprocket through the drive chain to drive the main shaft to rotate, the traction sprocket is engaged with the traction chain, and the traction chain is movably placed inside the guide rail; The two ends of the cleaning tooth rake are connected to the traction chain and driven by the traction chain to perform rotary motion along the guide rail; The trash rack body includes an oil cylinder, a movable rod, a fixed rod, a movable bar, a fixed bar, an inner rod and an outer cavity rod. Both ends of the fixed rod and the outer cavity rod are fixedly connected to the head frame, and a plurality of fixed bars are fixedly arranged between the fixed rod and the outer cavity rod; a cavity is provided inside the outer cavity rod, and an inner rod is rotatably provided inside the cavity, and a plurality of slots are provided on the upper surface of the outer cavity rod. A movable rod is provided above the fixed rod, and a plurality of movable bars are fixedly arranged between the movable rod and the inner rod, and the plurality of movable bars pass through the plurality of slots on the outer cavity rod in a one-to-one manner; both ends of the movable rod are hinged to the piston rod of the oil cylinder, the cylinder body of the oil cylinder is hinged to the head frame, and the fixed bars and the movable bars are arranged at intervals.

2. The rotary garbage cleaning machine with automatic adjustment and protection function according to claim 1 is characterized in that: The transmission part also includes an overload protection device, which includes a middle chain hub and a safety pin. The middle chain hub is fixedly connected to the main shaft and is located on the inner side of the driving sprocket. The disk surfaces of the middle chain hub and the driving sprocket are both provided with a plurality of pin holes corresponding to each other. The middle chain hub and the driving sprocket are connected by the safety pin. The driving sprocket is connected to the main shaft in a freely rotatable manner; A sliding bearing is provided between the head frame and the main shaft, a toothed induction disc is provided at one end of the main shaft away from the center chain hub, and a proximity switch is also provided in the head frame near the toothed induction disc; The overload protection device also includes a control module and a relay. When the main shaft rotates under the drive of the drive sprocket, the toothed sensing disk rotates synchronously with the main shaft, and the signal sensed by the proximity switch is transmitted to the control module. The control module analyzes and calculates the input pulse signal to control the relay output; when a mechanical overload occurs, the safety pin is cut off, the main shaft stops rotating, the continuous pulse signal is interrupted, the pulse count within the unit period is lower than the initial set value, the output relay is activated, the normally closed contact is disconnected, and the motor stops; at the same time, the normally open point is energized, the alarm power is connected, and an audible and visual signal is emitted.

3. The rotary garbage cleaning machine with automatic adjustment and protection function according to claim 1 is characterized in that: The diameter of the fixed rod is equal to half of the width of the fixed bars, the diameter of the movable rod is equal to half of the width of the movable bars, and the width of the fixed bars is equal to the width of the movable bars.

4. The rotary garbage cleaning machine with automatic adjustment and protection function according to claim 1 is characterized in that: The slotting angle of the slot is greater than the maximum rotatable angle of the movable grid bar.

5. The rotary garbage cleaning machine with automatic adjustment and protection function according to claim 1 is characterized in that: The maximum length of the perpendicular line between the movable rod and the fixed grid bar is smaller than the minimum length of the perpendicular line between the rear traction chain and the fixed grid bar.

6. The rotary garbage cleaning machine with automatic adjustment and protection function according to claim 1 is characterized in that: It also includes a water depth sensor and a flow rate sensor. The water depth sensor is located on the front side of the head frame and is used to detect the current liquid level; the flow rate sensor is located at the fixed bars and is used to detect the flow rate of water currently flowing through the trash rack body.

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