A grating device having a rotary rake

Abstract

The present application relates to a kind of grid devices with rotary harrow tooth, including support unit, harrow tooth unit, harrow tooth cleaning unit, chute and grid, the grid is vertically or obliquely installed in water treatment pool body, support unit is erected above the grid, the top of grid is connected with the bottom of chute, chute is obliquely arranged in support unit inside;The harrow tooth unit is movably connected with the main frame of support unit and can move up and down along the main frame, the head of harrow tooth unit is provided with retractable harrow tooth, the harrow tooth cleaning unit is arranged at the top of support unit, harrow tooth moves up and down along the grid and chute, for harrow tooth to clean waste on the grid to chute, again along chute to harrow tooth cleaning unit;The bottom of harrow tooth cleaning unit is provided with cleaning strip, cleaning strip can reciprocate along harrow tooth, for cleaning waste on harrow tooth out of chute.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of water treatment equipment, and particularly relates to a grating device with rotary rake teeth. BACKGROUND

[0002] With the development of environmental protection technology and the improvement of sewage treatment level in China, the equipment technology for sewage treatment has also been widely concerned by the technical personnel in the field. The grating is a common water treatment component, which plays a role in intercepting and removing suspended solids and floating materials with larger particle size in sewage, and protecting the subsequent water pump unit and treatment device, and is commonly used in the filter tank in the primary stage of water treatment. The grating is an important component for physically intercepting solid waste, and is widely used in various water treatment systems, and is indispensable pre-treatment equipment for sewage treatment plants, pump stations and the like. Most gratings are composed of grids or parallel bars, and while filtering sewage, solid waste stays on the surface of the grating, and often causes serious problems such as winding and blocking, although some accessories such as backwashing and flushing are added, but the ideal cleaning effect is not ideal.

[0003] At present, the technical personnel in the field have developed a rake tooth type grating cleaning device, but there are still the following problems: 1. During the operation of the equipment, the chain wheel and the chain are easy to be wrapped with garbage and cause jamming; 2. The product adaptability is slightly poor, and the product structure is complex under the condition of deep water level; 3. Hard friction jamming is easy to occur between the two, in addition, the rake tooth structure is too weak and easy to be damaged, the rake tooth is too short, and the garbage is not completely cleaned; 4. The grating slag may scatter everywhere, the cleaning effect is not good, there are dead angles in the grating that cannot be cleaned, there are hidden dangers that the whole grating is filled, and the grating structure itself has design defects, which causes loss of sewage water. SUMMARY

[0004] In view of the above problems, the present application provides a grating device with rotary rake teeth, which comprises a support unit, a rake tooth unit, a rake tooth cleaning unit, a chute and a grating, the grating is vertically or obliquely installed in a water treatment tank body, the support unit is erected above the grating, the top of the grating is connected with the bottom of the chute, and the chute is obliquely arranged in the support unit;

[0005] The rake tooth unit is movably connected with the main frame of the support unit and can move up and down along the main frame, the head of the rake tooth unit is provided with retractable rake teeth, the rake tooth cleaning unit is arranged at the top of the support unit, the rake teeth move up and down along the grating and the chute, and are used for cleaning the waste on the grating to the chute, and then moving along the chute to the rake tooth cleaning unit; the bottom of the rake tooth cleaning unit is provided with a cleaning strip, the cleaning strip can reciprocate along the rake teeth, and is used for cleaning the waste on the rake teeth out of the chute.

[0006] Optionally, the support unit comprises a base, a main frame and first and second support vertical rods which are parallel to each other, the base is square, and the bottom parts of the first and second support vertical rods are fixedly connected to two opposite sides of the base, respectively.

[0007] The main frame is a square frame and comprises two parallel guide rail frame strips and two parallel frame connecting rods, the lower parts of the two guide rail frame strips are fixedly connected to two opposite sides of the base, respectively, and the upper parts of the two guide rail frame strips are fixedly connected to the upper parts of the first and second support vertical rods, respectively, so that the sides of the base, the guide rail frame strips and the support vertical rods form two parallel triangles on the sides of the base.

[0008] Optionally, the top part of the main frame is provided with a driving shaft, a motor and a speed reducer, the motor and the speed reducer are fixed to the outer wall of one of the guide rail frame strips after being matched, and one end of the driving shaft penetrates through the guide rail frame strip and is connected to the speed reducer, and the other end is rotatably connected to the inner wall of the other guide rail frame strip; the positions close to the two ends of the driving shaft are respectively provided with a driving sprocket, and the two driving sprockets are close to the inner walls of the two guide rail frame strips, respectively.

[0009] The bottom part of the main frame is provided with a driven shaft, the two ends of the driven shaft are rotatably connected to the inner walls of the two guide rail frame strips, and the positions close to the two ends of the driven shaft are respectively provided with a driven sprocket, and the two driven sprockets are close to the inner walls of the two guide rail frame strips, respectively.

[0010] The driving sprocket and the driven sprocket close to the same guide rail frame strip are connected to a transmission chain, that is, two transmission chains are arranged between the driving shaft and the driven shaft, for driving the rake unit to move.

[0011] The support unit of the present application builds a three-dimensional triangular support above the water treatment tank, which provides stable support for the rake unit, the rake cleaning unit and the trough, and the inclined main frame is suitable for the inclined grid and the trough, which is conducive to the cleaning of the grid when the rake moves up and down along the guide rail frame strip; the motor and the speed reducer provide power for the rotation of the driving shaft, the driving shaft drives the driving sprocket to rotate, the driving sprocket drives the driven shaft to rotate through the transmission chain, the motor can rotate forward and reverse, the two transmission chains can rotate clockwise or counterclockwise at the same time, the rake unit is connected to the transmission chain and moves up and down under the driving of the transmission chain, so that the rake carries away the waste left on the grid and transports it to the top along the trough, and finally the waste is cleaned by the cleaning strip of the rake cleaning unit, and the rake unit is reset and ready for the next cleaning.

[0012] Optionally, the tine unit comprises a plurality of rollers, a fixed plate and tines at the front end of the fixed plate, a hydraulic cylinder connected between the rollers and the fixed plate, two springs, a fixed frame, the rear end of the fixed frame is provided with a plurality of roller connecting plates parallel to each other, each roller connecting plate is provided with a roller at both ends, for matching the movement of the tine unit inside the main frame.

[0013] The front end of the fixed frame is movably connected with the fixed plate, the hydraulic cylinder and the spring are arranged above the fixed frame and are supported by the fixed frame, and the rear end of the fixed plate is fixedly connected with the extension end of the hydraulic cylinder. The roller connecting plates are perpendicular to the hydraulic cylinder, and the hydraulic cylinder and the two springs are parallel.

[0014] Further optionally, the inner wall of the guide rail frame strip is provided with a recessed guide rail groove, and the roller is mounted in the guide rail groove to drive the tine unit to move along the guide rail frame strip.

[0015] Optionally, the upper surface of the fixed frame is provided with two spring seats, which are arranged on the two sides of the hydraulic cylinder close to the roller connecting plate, one end of the spring is connected with the spring seat, and the other end is connected with the fixed plate.

[0016] Optionally, the tine comprises a plurality of densely arranged tine hooks, which are arranged in a row and uniformly distributed at the front end of the fixed plate, and each tine hook is provided with a limiting ball at both ends.

[0017] Preferably, each tine hook comprises 2-3 tine segments, the tine segments are connected end to end to form a tine hook, and adjacent two tine segments are rotatably connected, so that the included angle between the two adjacent tine segments can be arbitrarily changed, for example, the upper tine segment is fixed, and the adjacent lower tine segment can rotate 360° with the connecting part as the center.

[0018] Since most of the gratings are in the form of a grid, that is, they have horizontal and vertical intersecting grid bars, when the tine moves along the gap between the vertical grid bars and cleans the waste, it will constantly encounter the obstruction of the horizontal grid bars, which may cause the tine to collide with the grid bars, or even hinder the movement of the tine and cause the tine to break. The tine of the present application has a multi-segment tine hook, which can rotate flexibly, when the tine hook encounters the grid bar of the cross arm to prevent forward movement, the tine segment automatically rotates upward, the tine hook is closed, which can not only avoid obstacles, but also gather the waste that has been cleaned into the tine hook towards the fixed plate, so as not to easily fall off.

[0019] Optionally, the lower part of the chute is fixedly connected with the base, the bottom of the chute is connected with the top of the grid, which is convenient for receiving the waste cleaned by the tine, and the two sides of the chute are provided with baffles for blocking the waste and regulating the left and right movement range of the tine.

[0020] Optionally, the chute is provided with a horizontal middle opening, the length of the middle opening is not less than the length of the tine, and the middle opening is perpendicular to the movement direction of the tine unit in the chute.

[0021] The intermediate opening comprises an openable trough bottom plate, a rotating shaft and a switch, the bottom of the openable trough bottom plate is provided with the rotating shaft, the openable trough bottom plate itself is a part of the trough bottom plate, and the openable trough bottom plate rotates downward around the rotating shaft as the fulcrum, so that the trough has an opening for the tines to extend out; the front surface of the openable trough bottom plate faces the tines, and the switch is arranged on the lower surface of the trough and above the back surface of the openable trough bottom plate, and is used for clamping the openable trough bottom plate to prevent the openable trough bottom plate from rotating downward to open the intermediate opening.

[0022] Optionally, the tine cleaning unit comprises two sets of supporting horizontal rods, reset cylinders and material scraping connecting rods, and a cleaning strip, one end of each of the two supporting horizontal rods is connected to the top end of the first supporting vertical rod and the second supporting vertical rod respectively, and the other end of each of the two supporting horizontal rods is movably connected to the top end of each of the two material scraping connecting rods.

[0023] The telescopic end of the reset cylinder is movably connected to the material scraping connecting rod, and the fixed end of the reset cylinder is connected to the supporting horizontal rod.

[0024] The two ends of the cleaning strip are detachably connected to the bottom of each of the two material scraping connecting rods respectively, and the two reset cylinders are communicatively connected to the controller.

[0025] The grid device has an open structure, and the tine unit is arranged above the grid, so that no cavity is reserved behind the grid, and there is no risk of garbage accumulation behind the grid; under normal working conditions, the power components of the grid device mostly work on water, and especially the components above the base are above the water surface, so that the grid device runs stably and has a low failure rate, and the risk of chain and sprocket jamming is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a structural schematic view of the grid device with the rotary tines;

[0027] Figure 2 FIG. 3 is a structural schematic view of the tine unit;

[0028] Figure 3 FIG. 5 is a structural schematic view when the tine hook is stretched out;

[0029] Figure 4 FIG. 7 is a structural schematic view when the tine hook is retracted;

[0030] Figure 5 FIG. 9 is a structural schematic view of a local trough;

[0031] Figure 6 FIG. 11 is a schematic view of the opening of the intermediate opening.

[0032] In the attached diagram, 1-material trough, 2-grating, 3-main frame, 4-base, 5-first support vertical rod, 6-second support vertical rod, 7-guide rail frame, 8-frame connecting rod, 9-drive shaft, 10-driven shaft, 11-motor, 12-reducer, 13-drive sprocket, 14-driven sprocket, 15-pin, 16-brush, 17-roller, 18-fixed plate, 19-rake teeth, 20-hydraulic cylinder, 21-spring, 22-fixed frame, 23-roller connecting plate, 24-spring seat, 25-tooth hook, 26-limiting ball, 27-mounting seat, 28-ear plate, 29-buffer pad, 30-tooth joint, 31-tooth groove, 32-center opening, 33-openable trough bottom plate, 34-water pipe, 35-support crossbar, 36-reset cylinder, 37-scraper connecting rod, 38-cleaning strip. Detailed Implementation

[0033] This embodiment provides a bar screen device with rotary rake teeth, such as... Figures 1-6 As shown, it includes a support unit, a rake tooth unit, a rake tooth cleaning unit, a trough 1, and a grid 2. The grid 2 is installed vertically or inclined inside the water treatment tank. The support unit is erected above the grid 2. The top of the grid 2 is connected to the bottom of the trough 1. The trough 1 is inclined and installed inside the support unit.

[0034] The rake tooth unit is movably connected to the main frame 3 of the support unit and can move up and down along the main frame 3. The head of the rake tooth unit is provided with retractable rake teeth 19. The rake tooth cleaning unit is located on the top of the support unit. The rake teeth 19 move up and down along the grid 2 and the trough 1 to clean the waste on the grid 2 to the trough 1, and then move along the trough 1 to the rake tooth cleaning unit. The bottom of the rake tooth cleaning unit is provided with cleaning strips 38, which can reciprocate along the rake teeth 19 to clean the waste on the rake teeth 19 out of the trough 1.

[0035] Optionally, the grid 2 is a vertically installed arc shape, with the arc surface protruding in the opposite direction to the rake tooth unit, and is fixed to the civil engineering of the water treatment tank.

[0036] Optionally, the support unit includes a base 4, a main frame 3, and a first support rod 5 and a second support rod 6 that are parallel to each other. The base 4 is square, and the bottoms of the first support rod 5 and the second support rod 6 are respectively fixedly connected to two opposite sides of the base 4.

[0037] The main frame 3 is a square frame, and comprises two mutually parallel guide rail frame strips 7 and two mutually parallel frame connecting rods 8. The lower parts of the two guide rail frame strips 7 are fixedly connected to two opposite sides of the base 4 respectively, and the upper parts of the two guide rail frame strips 7 are fixedly connected to the upper parts of the first support vertical rod 5 and the second support vertical rod 6 respectively, so that the sides of the base 4, the guide rail frame strips 7 and the support vertical rods form two mutually parallel triangles on the sides of the base 4.

[0038] As a specific embodiment, the base 4 is rectangular, the bottom parts of the mutually parallel first support vertical rod 5 and the second support vertical rod 6 are fixedly connected to two long sides of the base 4 respectively and close to the trough 1, and the lower parts of the two guide rail frame strips 7 are fixedly connected to the two long sides of the base 4 respectively and away from the trough 1. The main frame 3 is inclined to the plane where the first support vertical rod 5 and the second support vertical rod 6 are located, and the first support vertical rod 5 and the second support vertical rod 6 are inclined to the main frame 3. Thus, the long sides of the base 4, the first support vertical rod 5 and the guide rail frame strips 7 form a triangle, and the other long side of the base 4, the second support vertical rod 6 and the other guide rail frame strip 7 form another triangle, and the two triangles are mutually parallel.

[0039] Optionally, the base 4 is installed on the civil part of the top of the water treatment tank, so that the support unit, the rake tooth unit, the rake tooth cleaning unit and the trough 1 have stable support.

[0040] Optionally, the two ends of the frame connecting rod 8 are fixedly connected to the inner walls of the two guide rail frame strips 7 respectively, and the frame connecting rod 8 is perpendicular to the guide rail frame strip 7. Two frame connecting rods 8 are arranged at the upper part and the lower part of the guide rail frame strip 7 respectively, so as to support the main frame 3 to be square structure, preferably rectangular structure. The guide rail frame strip 7 is long side, and the frame connecting rod 8 is short side. However, the top and the bottom of the guide rail frame strip 7 exceed the frame connecting rod 8.

[0041] Optionally, the top of the main frame 3 is provided with a driving shaft 9, a motor 11 and a speed reducer 12. The motor 11 and the speed reducer 12 are fixed to the outer wall of one guide rail frame strip 7 after being matched. One end of the driving shaft 9 penetrates the guide rail frame strip 7 and is connected to the speed reducer 12, and the other end is rotatably connected to the inner wall of the other guide rail frame strip 7. The positions close to the two ends of the driving shaft 9 are respectively provided with a driving sprocket 13, and the two driving sprockets 13 are respectively close to the inner walls of the two guide rail frame strips 7.

[0042] The bottom of the main frame 3 is provided with a driven shaft 10. The two ends of the driven shaft 10 are rotatably connected to the inner walls of the two guide rail frame strips 7. The positions close to the two ends of the driven shaft 10 are respectively provided with a driven sprocket 14, and the two driven sprockets 14 are respectively close to the inner walls of the two guide rail frame strips 7.

[0043] The driving sprocket 13 and the driven sprocket 14 close to the same guide frame strip 7 are jointly connected with a transmission chain, and two transmission chains are arranged between the driving shaft 9 and the driven shaft 10 for driving the rake unit to move.

[0044] The frame connecting rod 8 at the lower part of the main frame 3 is located above the driven shaft 10 and the driven sprocket 14, and preferably, the frame connecting rod 8 is provided with a brush 16 corresponding to the position of each driven sprocket 14, the brush 16 including an upper brush handle and a lower brush body, the brush handle being fixed on the driven shaft 10, and the brush body contacting the edge of the driven sprocket 14, so that the two brushes 16 can automatically clean the corresponding driven sprocket 14 during the rotation of the driven sprocket 14, preventing the waste below the main frame 3 from winding around the driven sprocket 14, thereby affecting the rotation of the transmission chain and preventing the chain from being stuck.

[0045] Optionally, the rake unit includes a plurality of rollers 17, a fixed plate 18 and a rake tooth 19 at the front end of the fixed plate 18, a hydraulic oil cylinder 20 connected between the roller 17 and the fixed plate 18, two springs 21, and a fixed frame 22, the rear end of the fixed frame 22 being provided with a plurality of roller 17 connecting plates parallel to each other, each roller 17 connecting plate being provided with a roller 17 at both ends thereof for cooperation with the movement of the rake unit inside the main frame 3.

[0046] The front end of the fixed frame 22 is movably connected with the fixed plate 18, the hydraulic oil cylinder 20 and the spring 21 being arranged above the fixed frame 22 and supported by the fixed frame 22, and the extension end of the hydraulic oil cylinder 20 being fixedly connected with the rear end of the fixed plate 18. The roller 17 connecting plate is perpendicular to the hydraulic oil cylinder 20, and the hydraulic oil cylinder 20 is parallel to the two springs 21.

[0047] Further optionally, the inner wall of the guide frame strip 7 is provided with a recessed guide groove (not shown), and the roller 17 is installed in the guide groove to drive the rake unit to move along the guide frame strip 7. Preferably, the rear end of the fixed frame 22 is provided with two roller 17 connecting plates parallel to each other, the two roller 17 connecting plates being arranged in an up-down manner, and each roller 17 connecting plate being provided with a roller 17 at both ends thereof, i.e. there are four rollers 17 in total, thereby ensuring the stability of the movement of the rake unit.

[0048] Optionally, the upper surface of the fixed frame 22 is provided with two spring seats 24 arranged on both sides of the hydraulic oil cylinder 20 close to the roller 17 connecting plate, one end of the spring 21 being connected with the spring seat 24, and the other end of the spring 21 being connected with the fixed plate 18, for stretching the rake tooth 19 and the fixed plate 18 downward when the rake tooth 19 encounters waste with relatively large resistance or hard waste or is stuck, so that the two springs 21 are also stretched, preventing the fixed plate 18 from being stuck hard, and fine-tuning the position of the fixed plate 18 and the rake tooth 19.

[0049] Optionally, the tines 19 include a plurality of densely arranged hooks 25 arranged in a row and uniformly distributed at the front end of the fixed plate 18, and the tines 19 are respectively provided with a limiting ball 26 at both ends, which can change the sliding friction into rolling friction when the tines 19 move up and down at the positions of the grid 2 and the chute 1, thereby reducing the friction and preventing the tines 19 from being stuck or jammed with the grid 2 or the chute 1.

[0050] Preferably, the limiting ball 26 can be retracted into the groove where it is located under external pressure, thereby providing a surplus space for the slight left and right movement of the tines 19.

[0051] Optionally, the middle part of the fixed plate 18 is movably connected to the front end of the fixed frame 22 through the mounting seat 27 and the pin shaft 15, and the middle part of the fixed plate 18 is respectively provided with a mounting seat 27 at both sides, and the mounting seat 27 and the corresponding position of the fixed frame 22 are provided with through holes, so that the pin shaft 15 can penetrate through the through holes to connect the mounting seat 27 and the fixed frame 22; the fixed plate 18 can rotate up and down within a certain range with the two pin shafts 15 as the center, thereby finely adjusting the angle or position of the fixed plate 18 and the tines 19, so that there is a buffer effect when the tines 19 are stuck, and the fixed plate 18 will not be broken hard.

[0052] Further optionally, the rear end of the fixed plate 18 is connected to the two sides of the fixed frame 22 through the ear plate 28 and the nut, and the rear end of the fixed plate 18 is respectively provided with a buffer rubber pad 29 at both sides corresponding to the ear plate 28, and the nut connects the ear plate 28 and the corresponding buffer rubber pad 29; when the fixed plate 18 rotates around the pin shaft 15, the front end of the fixed plate 18 will be raised upward, and the rear end will be pressed downward, and the buffer rubber pad 29 provides a buffer effect for the rear end of the fixed plate 18 and the ear plate 28. Specifically, the ear plate 28 and the nut are arranged at the rear position of the front end of the fixed frame 22, so that the rear part of the fixed plate 18 partially overlaps with the front part of the fixed frame 22 in the horizontal direction, and the fixed plate 18 at the overlapping position is located above the fixed frame 22, so that the nut is in a vertical or inclined state.

[0053] Optionally, the rear end of the fixed frame 22 is provided with a plurality of chain connecting plates (not shown), and the transmission chains are connected through the chain connecting plates, for example, two chain connecting plates are at the same horizontal height, one end of the two chain connecting plates is arranged on the fixed frame 22 between the two roller connecting plates 17, and the other end is respectively connected to the two transmission chains, the transmission chains drive the tine unit to move through the chain connecting plates, and in turn drive the rollers 17 to move along the guide grooves of the guide frame strips 7.

[0054] At present, the grid 2 is used for preliminary filtering of sewage, and often filters out large pieces of garbage, hair, plastic strips and other waste. The large garbage is easy to cause the jamming of the cleaning tine 19, and even the tine 19 and the related connecting mechanism are stuck. If the cleaning is not stopped in time in the stuck state, the damage and breakage of the tine 19 and the cleaning device will be caused. The long hair and plastic bag are often entangled between the tine 19 and the grid 2, and the normal operation of the tine 19 is prevented. In view of the above problems, the anti-stuck or jamming design is carried out on the tine unit to cope with the above situation. Specifically, the limiting ball 26 at both ends of the tine 19 can reduce the friction between the tine 19 and the grid 2 and the chute 1, and finely adjust the left and right positions of the tine 19, so that the tine 19 runs more smoothly. The tine unit is designed with four mechanisms (hydraulic cylinder 20, spring 21, shaft pin and mounting seat 27, buffer rubber pad 29 and ear plate 28 nut), which adjust the position of the fixed plate 18 and the tine 19, so that the grid 2 can be completely cleaned, and the stuck or jamming problem is solved. The hydraulic cylinder 20 directly adjusts the extension distance of the fixed plate 18 through the extension end. On the basis that the tine unit moves to the position to be cleaned along the guide rail frame strip 7, the hydraulic cylinder 20 controls the extension distance of the fixed plate 18 and the tine 19, so that the waste in the deeper position of the same height of the grid 2 can be cleaned. When the tine 19 is stuck by a larger waste, the fixed plate 18 rotates around the shaft pin on the mounting seat 27 as a center support point, the tine 19 is pressed downward, the fixed plate 18 at the buffer rubber pad 29 is tilted upward, the springs 21 on both sides of the hydraulic cylinder 20 are stretched, the height position of the tine 19 is finely adjusted, the waste is cleaned, and the fixed plate 18 and the tine 19 are protected from being broken. After the jamming is removed, the fixed plate 18 is reset under the contraction and pulling effect of the spring 21, the rear end of the fixed plate 18 is pressed downward, and the buffer rubber pad 29 prevents the hard collision with the ear plate 28.

[0055] Preferably, each of the tooth hooks 25 comprises 2-3 tooth segments 30, the tooth segments 30 are connected in series to form a tooth hook 25, and the adjacent two tooth segments 30 are rotationally connected, so that the included angle between the two adjacent tooth segments 30 can be arbitrarily changed. For example, the previous tooth segment is fixed, and the adjacent next tooth segment can rotate 360° around the connection point as the center.

[0056] Preferably, any tine hook 25 of the tine 19 is provided with an inductor, which is communicatively connected to a controller. When the inductor senses a hard obstacle, it is determined that the tine hook 25 encounters a fence in a different direction, and the controller controls the tine hook 25 to retract. When the inductor cannot sense a hard obstacle, it is determined that the height of the tine hook 25 is greater than the fence, and the controller controls the tine hook 25 to relax, so as to continue to clean the waste between the fences. During the short period from the retraction to the relaxation of the tine hook 25, the up-and-down movement of the tine unit does not need to be stopped, because the spring 21, the mounting seat 27 and the pin shaft 15 allow the fixed plate 18 and the tine 19 to fine-tune the height. The controller can be arranged in a water treatment centralized control room or outside the fence device.

[0057] Optionally, the tine hook 25 can rotate 360° in place under the control of the controller, so as to wind and take away the strip-shaped waste on the fence 2.

[0058] Optionally, the lower part of the chute 1 is fixedly connected to the base 4, and the bottom of the chute 1 is connected to the top of the fence 2, so as to facilitate the collection of the waste cleaned by the tine 19. The chute 1 is provided with a baffle on both sides, which is used to block the waste and regulate the left-and-right movement range of the tine 19.

[0059] Further optionally, one side of the chute 1 facing the tine 19 is an upper surface, and the upper surface of the chute 1 is provided with a plurality of tooth grooves 31 recessed downward. The length of the tooth groove 31 is equal to the length of the chute 1, that is, the tooth groove 31 penetrates the chute 1 in the length direction. The number of the tooth groove 31 is equal to the number of the tine hook 25, and the tooth groove 31 corresponds to the position of the tine hook 25 one by one. When the tine 19 moves to the chute 1, the tine hook 25 extends into the tooth groove 31. In this way, it can prevent the small-volume waste cleaned on the tine 19 from falling back to the fence 2 from the gap between the tine hooks 25, and prevent the tine 19 from directly contacting and scratching the upper surface of the chute 1. Preferably, a rubber pad is arranged in the tooth groove 31 to further prevent the tine hook 25 from scratching.

[0060] In this way, the tine hook 25 and the tooth groove 31 of the chute 1 are matched one by one, and the gap between the tine hooks 25 and the protruding part of the chute 1 between the tooth grooves 31 are matched one by one. Therefore, the tine 19 and the chute 1 are well connected and matched, so as to prevent the waste on the tine 19 from falling during the movement.

[0061] Optionally, the chute 1 is provided with a horizontal middle opening 32, and the length of the middle opening 32 is not less than the length of the tine 19. The middle opening 32 is perpendicular to the movement direction of the tine unit in the chute 1.

[0062] The intermediate opening 32 comprises a hinged trough bottom plate 33, a rotating shaft and a switch. The bottom of the hinged trough bottom plate 33 is provided with a rotating shaft. The hinged trough bottom plate 33 is a part of the trough 1 bottom plate. It rotates downward around the rotating shaft, so that the trough 1 has an opening for the tines 19 to extend out. The front of the hinged trough bottom plate 33 faces the tines 19. The switch is arranged on the lower surface of the trough 1 and above the back of the hinged trough bottom plate 33. It is used to block the hinged trough bottom plate 33 to prevent it from rotating downward to open the intermediate opening 32. The switch can be any form in the market that can achieve the above functions, such as buckle type, latch type, etc.

[0063] Optionally, a plurality of water pipes 34 are arranged in the trough 1 bottom plate above the intermediate opening 32. The pipe openings are located at the cross section of the trough 1 bottom plate above the intermediate opening 32 and the hinged trough bottom plate 33. When the hinged trough bottom plate 33 is opened, the pipe openings of the water pipes 34 are exposed. The waste on the tines 19 extending out of the intermediate opening 32 can be washed away. The water pipes 34 are embedded in the protruding part between two adjacent tooth grooves 31 of the trough 1. The water pipes 34 can penetrate through the trough 1 and extend out from the top of the trough 1 to connect the water source. Alternatively, the water pipes 34 can penetrate through part of the trough 1 and extend out from the lower surface of the trough 1 to connect the water source.

[0064] When the tines 19 clean out a large amount of waste and move up to the tine cleaning unit along the trough 1, the distance is long. Part of the waste may fall or stick to the upper surface of the trough 1. The intermediate opening 32 is arranged on the trough 1. The weight sensor is arranged on the fixed plate 18. The weight sensor, the switch, the hydraulic cylinder 20 and the water source control device are communicatively connected to the controller. When the weight of the tines 19 increases by more than a preset value, it indicates that a large amount of waste is cleaned out. When the tines 19 move below the intermediate opening 32, the controller opens the switch and the tine cleaning unit temporarily stops moving. The hinged trough bottom plate 33 is pushed open by the tines 19 during the process of the tines 19 extending out of the intermediate opening 32 under the control of the hydraulic cylinder 20. The water pipes 34 spray water downward to wash away the waste on the tines 19. When the weight of the tines 19 returns to the bare weight before cleaning or is lower than a certain preset value, the water pipes 34 stop spraying water. The hydraulic cylinder 20 controls the tines 19 to retract. The hinged trough bottom plate 33 automatically returns to the closed position after losing the pushing force of the tines 19. The switch is closed. The tine unit can move downward to continue cleaning the grating 2.

[0065] Optionally, the tine cleaning unit comprises two sets of support cross bars 35, reset cylinders 36 and scraping connection rods 37, and a cleaning strip 38. One end of each of the two support cross bars 35 is connected to the top end of the first support vertical bar 5 and the second support vertical bar 6, respectively. The other end of each of the two support cross bars 35 is movably connected to the top end of the two scraping connection rods 37, respectively.

[0066] The telescopic end of the reset cylinder 36 is movably connected with the scraping connecting rod 37, and the fixed end of the reset cylinder 36 is connected with the support cross rod 35;

[0067] The two ends of the cleaning strip 38 are respectively detachably connected with the bottom of the two scraping connecting rods 37; and the two reset cylinders 36 are communicatively connected with the controller.

[0068] When the rake tooth unit carries the waste to move upward to the top of the trough 1, the rake tooth 19 is above the top of the trough 1, and the cleaning strip 38 is above the rake tooth 19, and the two reset cylinders 36 are simultaneously extended to push the corresponding scraping connecting rod 37 outward under the control of the controller, thereby driving the cleaning strip 38 to also move outward along the rake tooth 19, scraping the waste on the rake tooth 19, and the waste falls from the outside of the lower surface of the trough 1, preferably, the outside of the lower surface of the trough 1 is provided with a collection box for receiving the waste falling from the top or the middle opening 32 of the trough 1. The reset cylinder 36 is retracted to reset the scraping connecting rod 37 and the cleaning strip 38, and in order to completely clean the rake tooth 19, the reset cylinder 36 can be moved several times to clean the rake tooth 19 several times.

[0069] Optionally, the cleaning strip 38 is inclined to the outside of the trough 1, and the bottom edge of the cleaning strip 38 has a plurality of protruding cleaning teeth corresponding to the gap between the tooth hooks 25, for example, one cleaning tooth corresponds to the gap between two adjacent tooth hooks 25; in use, the cleaning strip 38 is pushed obliquely outward, the cleaning teeth are inserted into the gap between the two tooth hooks 25, and then the cleaning strip 38 is continuously pushed obliquely outward to clean the waste on the tooth hooks 25 and between the tooth hooks 25, and the cleaning teeth are particularly suitable for cleaning strip-shaped, strip-shaped waste such as hair or plastic bags.

[0070] Optionally, the cleaning strip 38 is a plate suitable for cleaning block-shaped waste.

[0071] If there is waste adhering to the upper surface of the trough 1 during the upward movement of the rake tooth unit, the later downward movement of the rake tooth unit can clean the trough 1 again to return the waste to the grid 2 for next cleaning.

Claims

1. A grating device having a rotary rake tooth, characterized by The utility model provides a water treatment device, including support unit, harrow unit, harrow cleaning unit, trough and grid, the grid is installed in water treatment pond body vertically or obliquely, support unit erects in the top of grid, the top of grid links with the bottom of trough, and the trough is obliquely arranged in the inside of support unit, The head of harrow unit is provided with retractable harrow, the bottom of harrow cleaning unit is provided with cleaning strip, and the cleaning strip can reciprocate along the harrow, which is used for cleaning the waste on the harrow out of the trough. The trough is provided with horizontal middle opening, the length of the middle opening is not less than the length of the harrow, and the middle opening is perpendicular to the movement direction of the harrow unit in the trough. The bottom of the openable trough bottom plate is provided with a rotating shaft, and the openable trough bottom plate itself is a part of the trough bottom plate, which rotates downward around the rotating shaft as the fulcrum, so that the trough has an opening for the harrow to extend out.

2. A grating device with a rotary tine according to claim 1, characterized in that, The support unit includes a base, a main frame, and first and second support vertical rods that are parallel to each other. The main frame is a square frame and includes two parallel guide rail frame strips and two parallel frame connecting rods.

3. A grating device with a rotary tine according to claim 2, characterized in that, The top of the main frame is provided with a driving shaft, a motor, and a speed reducer. The bottom of the main frame is provided with a driven shaft. The driving shaft and the driven shaft are connected by two transmission chains. The two transmission chains are used to drive the harrow unit to move.

4. A grating device with a rotary tine according to claim 3, characterized in that The rake unit comprises a plurality of rollers, a fixed plate, and a rake tooth at the front end of the fixed plate, a hydraulic cylinder connected between the roller and the fixed plate, two springs, and a fixed frame, wherein the rear end of the fixed frame is provided with a plurality of roller connecting plates parallel to each other, and each roller connecting plate is provided with a roller at each end thereof for matching the movement of the rake unit inside the main frame. The front end of the fixed frame is movably connected to the fixed plate, the hydraulic cylinder and the spring are arranged above the fixed frame and are supported by the fixed frame, and the extension end of the hydraulic cylinder is fixedly connected to the rear end of the fixed plate.

5. A grating device with a rotary tine according to claim 4, characterized in that The inner wall of the guide rail frame strip is provided with a recessed guide rail groove, and the roller is mounted in the guide rail groove to drive the rake unit to move along the guide rail frame strip. The upper surface of the fixed frame is provided with two spring seats arranged on the two sides of the hydraulic cylinder close to the roller connecting plate, one end of the spring is connected to the spring seat, and the other end of the spring is connected to the fixed plate.

6. A grating device with a rotary tine according to claim 5, characterized in that The rake tooth comprises a plurality of densely arranged tooth hooks uniformly distributed in a row at the front end of the fixed plate, and each tooth hook is provided with a limiting ball at each end thereof.

7. A grating device with rotary tines according to claim 6, characterized in that Each tooth hook comprises 2-3 tooth segments, the tooth segments are connected end to end to form a tooth hook, and the adjacent two tooth segments are rotatably connected to allow the included angle between the two adjacent tooth segments to be arbitrarily changed.

8. A grating device with rotary tines according to claim 7, characterized in that The lower part of the chute is fixedly connected to the base, the bottom of the chute is connected to the top of the grid to facilitate the collection of waste cleaned by the rake tooth, and the two sides of the chute are provided with baffles for blocking the waste and regulating the left and right movement range of the rake tooth.

9. The grizzly device with rotary tines according to claim 2, characterized in that, The rake cleaning unit comprises two sets of supporting horizontal rods, a reset cylinder, and a scraping connecting rod, and a cleaning strip, one end of each supporting horizontal rod is connected to the top end of the first supporting vertical rod and the second supporting vertical rod, and the other end of each supporting horizontal rod is movably connected to the top end of the scraping connecting rod. The extension end of the reset cylinder is movably connected to the scraping connecting rod, and the fixed end of the reset cylinder is connected to the supporting horizontal rod. The two ends of the cleaning strip are detachably connected to the bottom of the two scraping connecting rods.

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