Hydraulic transmission mechanical grating

Abstract

The utility model discloses a kind of hydraulic transmission mechanical grating, mainly related to the field of grating equipment. Including the installation frame of rectangle, the inner frame of being suitably sized with its inside sleeve is fixed, inner frame is equipped with grating strip equidistantly along height direction, the side of grating strip is equipped with upright connecting strip, connecting strip is fixed with multiple sliding tooth between grating strip, sliding tooth and the grid gap of grating strip sliding fit, the side of connecting strip away from grating strip is equipped with two upper and lower cross beams, the side of cross beam close to installation frame is equipped with sliding plate, the inside of installation frame is equipped with the sliding slot of being slidably connected with sliding plate, the upper side of installation frame is fixed with oil cylinder, the one end of oil cylinder is equipped with cylinder rod retracting along installation frame length direction, the end of cylinder rod and the middle part of upper side cross beam are detachably fixed. The utility model has the beneficial effect that: based on the sundries of cleaning grid gap by hydraulic drive, reduce damage frequency, facilitate disassembly, simplify maintenance operation, reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of bar screen equipment, specifically a hydraulically driven mechanical bar screen. Background Technology

[0002] Bar screens, as fully automated solid waste interception devices, have a wide range of applications. They can intercept suspended solids, floating objects, and solid debris in rainwater and sewage. During operation, it is necessary to clean the debris between the bar screens regularly to ensure the filtration throughput of the screens.

[0003] Traditional cleaning mechanisms typically have their drive cylinders positioned at the center of the water-facing side of the screen, constantly submerged in high water levels. This leads to aging of the seals, and direct impact from mud and floating debris into the cylinder body, resulting in frequent malfunctions. Furthermore, the cylinder body and stroke frame are often welded as a single unit, making individual replacement impossible on-site. They must be disassembled and taken back to the factory along with the brush rods and slides, further extending downtime. This non-removable structure results in "minor damage requiring major repairs," necessitating the purchase of spare parts in bulk, leading to high warehousing costs and hindering the urgent needs of municipal pumping stations for rapid response and low-cost maintenance.

[0004] Meanwhile, most horizontal overflow screens currently used at the overflow outlets of combined sewer systems or at the effluent outlets of sewage treatment plants generally adopt an integral welded frame, with the screen bars and frame fixed to the concrete weir wall in one go. Once the screen bars bend or break due to impact from floating objects, heavy rain, or long-term fatigue, maintenance personnel must first remove the entire frame along with the installation anchors from the wall, and then transport it to the workshop for cutting, repair welding, or complete replacement. The installation frame is usually made of thick-walled stainless steel, with expansion bolts embedded deep into the wall. The disassembly process not only damages the civil structure but also requires repair and secondary grouting, which often takes more than half a day. This results in high labor intensity, long traffic disruptions, and high maintenance costs. Utility Model Content

[0005] The purpose of this utility model is to provide a hydraulically driven mechanical bar screen that uses hydraulic power to clean debris from the bar screen gaps, reducing the frequency of damage, facilitating disassembly, simplifying maintenance operations, and reducing maintenance costs.

[0006] To achieve the above objectives, this utility model employs the following technical solution: A hydraulically driven mechanical bar screen includes a rectangular mounting frame. An inner frame of the same size is fitted and fixed inside the mounting frame. Bar screen strips are equidistantly arranged along the height direction of the inner frame. An upright connecting strip is provided on one side of each bar screen strip. Multiple sliding teeth located between the bar screen strips are fixed on the connecting strip. The sliding teeth slide with the gaps between the bar screen strips. Two horizontal beams are provided on the side of the connecting strip away from the bar screen strips. A sliding plate is provided on the side of the horizontal beams near the mounting frame. A sliding groove is provided on the inner side of the mounting frame to slide with the sliding plate. A hydraulic cylinder is fixed on the upper side of the mounting frame. One end of the hydraulic cylinder is provided with a cylinder rod that extends and retracts along the length direction of the mounting frame. The end of the cylinder rod is detachably fixed to the middle of the upper horizontal beam.

[0007] The inner frame is fixed to the mounting frame by multiple fasteners on its periphery.

[0008] Multiple pressure frames and pressure strips are equidistantly arranged along the length of the inner frame. The pressure frames and pressure strips are arranged on both sides of the grid strips and extend relative to the width direction of the inner frame. The height of the pressure frame is adapted to the height of the inner frame. The pressure frame has corner plates at its upper and lower ends that are fixed to the inner frame by bolts, so that the pressure frame is in the shape of "[". Multiple clamping bolts located between the grid gaps pass through the pressure frames and pressure strips. The clamping bolts are located between the grid strips, and there is one and only one connecting strip between adjacent pressure frames.

[0009] The upper side of the mounting frame is provided with a mounting plate extending horizontally to one side. The mounting plate is located on the side of the water outlet direction. The oil cylinder is fixed below the mounting plate and is set near one end of the mounting plate. The oil cylinder is covered with a protective plate. The protective plate is L-shaped and its sides are fixed to the mounting plate by fasteners. The protective plate has a row of strip holes along its length direction. The strip holes penetrate the vertical side and bottom side of the protective plate.

[0010] The cylinder rod has a mounting hole at its end that passes through it from top to bottom. A connecting seat is fixedly welded to the middle of the crossbeam near the upper side. A vertical bolt passes through the connecting seat from top to bottom. The vertical bolt rod is used to pass through the mounting hole at the end of the cylinder rod and is fitted with a nut.

[0011] The crossbeam and connecting strip are detached and fixed by a groove plate. The groove plate has a U-shaped cross-section and is movably inserted into the connecting strip. Multiple fixing screws pass through the groove plate. Cutouts are made at the center of both ends of the groove plate. The length of the cutouts corresponds to the length of the groove plate. Long bolts pass through the cutouts. The nuts of the long bolts are located inside the groove plate and are blocked by the cutouts. The crossbeam has through holes corresponding to the long bolts. The long bolts pass through the through holes and are fitted with fastening nuts.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This bar screen device uses hydraulic drive to clean the gaps between the bar screens in a timely manner. The hydraulic cylinders are above the water surface for most of the operating time, avoiding immersion and impact. The components adopt an independent modular design that is easy to disassemble. Most of them are installed using fasteners, allowing for independent disassembly and installation of the mounting frame, filtration section, and cleaning section components. After the mounting frame is fixed, an independently removable inner frame is set inside. The bar screen bars are first welded to the inner frame to form a module, and then quickly connected to the mounting frame with bolts. When the bar screen bars deform or the spacing increases, the inner frame can be pulled out as a whole simply by loosening the circumferential bolts. On-site replacement can be completed in ten minutes without touching the mounting frame and the wall, eliminating the risk of damage to the civil engineering. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the water outlet side of this utility model.

[0014] Figure 2 This is a schematic diagram of the water inlet side of this utility model.

[0015] Figure 3 This is a component disassembly diagram of the mounting frame and inner frame of this utility model.

[0016] Figure 4 This is a schematic diagram of the cleaning mechanism of this utility model.

[0017] Figure 5 This is a component disassembly diagram of the cleaning mechanism of this utility model.

[0018] The labels shown in the attached diagram: 1. Mounting frame; 2. Inner frame; 3. Grille strip; 4. Pressure frame; 5. Angle plate; 6. Pressure strip; 7. Clamping bolt; 8. Mounting plate; 9. Hydraulic cylinder; 10. Cylinder rod; 11. Vertical bolt; 12. Sliding tooth; 13. Connecting strip; 14. Groove plate; 15. Fixing screw; 16. Cutout; 17. Crossbeam; 18. Slide plate; 19. Long bolt; 20. Connecting seat; 21. Guard plate; 22. Slide groove. Detailed Implementation

[0019] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0020] Example:

[0021] This example describes a pre-reserved bar screen as a complete device product, which includes a mounting frame 1. The mounting frame 1 is used to support all components and serves as the outer frame structure of the product for installation at the outlet or overflow port.

[0022] The sides of the mounting frame 1 can be secured with fasteners. It is made of stainless steel, making it more robust and durable.

[0023] The mounting frame 1 is a long, rectangular structure, typically larger than... Figure 1 The proportions shown are elongated, but there are also products of this size that are required depending on the situation. In order to better show product details, examples with smaller proportion differences are shown in the illustrations.

[0024] The inner side of the mounting frame 1 is fixed with an inner frame 2 that is easy to disassemble. The size of the inner frame 2 corresponds to that of the mounting frame 1 and is fixed to the mounting frame 1 by multiple bolts on the periphery, which facilitates processing and assembly. The grid strips 3 are fixed horizontally in the inner frame 2. Specifically, the two ends of the grid strips 3 can be welded and fixed to the two vertical side walls of the inner frame 2. The grid strips 3 are evenly spaced and extend horizontally. The grid strips 3 are evenly distributed in the upper and lower parts of the inner frame 2 to form a barrier structure.

[0025] The grid spacing of the grid strip 3 can be either 4mm or 6mm, which are two common specifications.

[0026] Multiple pressure frames 4 and pressure strips 6 are equidistantly arranged along the length of the inner frame 2. The height of the pressure frame 4 is adapted to the inner height of the inner frame 2. The pressure frame 4 adopts a "[" shape structure, with corner plates 5 fixed to the inner frame 2 at both ends by bolts. The length of the pressure strip 6 is adapted to the distance between the two corner plates 5. The pressure frame 4 and pressure strip 6 are arranged on both sides of the grid strip 3, and the pressure frame 4 and pressure strip 6 extend relative to the width direction of the inner frame 2. Multiple clamping bolts 7 pass through the pressure frame 4 and pressure strip 6, located between the grid strips 3, to reinforce and fix the spacing of the grid strips 3, preventing the longer grid strips 3 from deforming or separating from the inner frame 2 under stress. Therefore, the pressure frame 4 and pressure strip 6 are components that reinforce the structure of the grid strip 3. The clamping bolts 7, which span the gaps, form a multi-point clamping mechanism for the grid bars, preventing lateral deformation of individual bars and allowing maintenance personnel to increase or decrease the clamping points according to working conditions, achieving "no bending under heavy load and quick disassembly under light load". The cleaning mechanism adopts a "dry side-mounted" layout.

[0027] The installation density of the clamping bolts 7 can be increased or decreased according to the working conditions. Generally, several sets can be set alternately on each set of clamping frame 4 and clamping strip 6. In some cases where the filtration load is heavy and the grid gap is wide, clamping bolts 7 can be installed between each grid strip 3 to ensure that the spacing between each grid strip 3 is not inconvenient and to reduce deformation.

[0028] In the actual processing, the mounting frame 1 is processed independently, while the inner frame 2 and the grid strips 3 are pre-processed by welding. Then, the pressure frame 4 and pressure strips 6 are installed on the inner frame 2 with fasteners, and the inner frame 2 is then installed on the mounting frame 1 with bolts. This completes the initial assembly of the grid structure, which is simple in structure and easy to disassemble and replace.

[0029] Since the mounting frame 1 may be fixed to the wall structure using expansion screws or other potentially destructive methods, and the wall structure needs to be maintained once it is disassembled, and the mounting frame 1 has a high material cost due to its robustness considerations, and it is generally not damaged, under the above structure, if the grille is damaged, only the inner frame 2 needs to be replaced, without removing the mounting frame 1. This not only simplifies maintenance (removing the mounting frame 1 is troublesome and time-consuming, and also requires wall repair), but also reduces maintenance costs.

[0030] The upper side of the mounting frame 1 is provided with a mounting plate 8 that extends horizontally to one side, and the upper baffle is generally located on the side of the water outlet direction during installation.

[0031] The mounting plate 8 is used to install a hydraulically driven cleaning mechanism.

[0032] The cleaning mechanism includes multiple connecting strips 13, which are arranged relative to the width direction of the mounting frame 1. The connecting strips 13 are located on the side of the grille closer to the water outlet, and the connecting strips 13 are located between adjacent pressure frames 4, with only one connecting strip 13 between every two adjacent pressure frames 4.

[0033] like Figure 1 As shown, since the pressure frame 4 and the pressure strip 6 divide the grid strip 3 into multiple parts, in this example it is divided into 3 independent parts. Therefore, the pressure frame 4 prevents the sliding of the sliding tooth 12, and the excessive stroke is also not conducive to stability. Therefore, multiple connecting strips 13 are set for separate cleaning.

[0034] The connecting strip 13 has a plurality of sliding teeth 12 fixed on one side near the grid strip 3, which are located between the grids and slide in cooperation with the grid gap. The sliding teeth 12 are triangular and the thickness is adapted to the size of the grid gap. The sliding teeth 12 are equidistantly arranged along the length direction of the connecting strip 13, and remove debris stuck on the grid gap by sliding left and right.

[0035] The cleaning mechanism is powered by a hydraulic cylinder 9, which is fixedly installed below the mounting plate 8. Specifically, the hydraulic cylinder 9 is positioned near one end of the mounting plate 8. A protective plate 21 is fixed to the side of the mounting plate 8 where the hydraulic cylinder 9 is installed. The protective plate 21 has an L-shaped structure and a row of strip-shaped holes along its length. These holes penetrate the vertical side and bottom side of the protective plate 21, preventing water accumulation at the bottom. When water enters, the holes filter out the water and prevent debris from entering. The protective plate 21 is fixed to the bottom of the mounting plate 8 with bolts and screws, protecting the internal hydraulic cylinder 9. Unless there is a flood discharge, the water level will not be at the height of the protective plate 21, ensuring that the hydraulic cylinder 9 is not submerged in water under most operating conditions. Compared to a grid device that installs the hydraulic cylinder 9 in the middle, this significantly reduces the adverse effects of harsh operating conditions.

[0036] The hydraulic cylinder 9 is horizontally arranged and has a cylinder rod 10 that extends and retracts at its inner end. The end of the cylinder rod 10 has a mounting hole that extends through it vertically.

[0037] The cleaning mechanism also includes a travel frame, which comprises two crossbeams 17 positioned near the long side of the mounting frame 1. A sliding plate 18 is provided on the side of each crossbeam 17 near the mounting frame 1, and a sliding groove 22 is provided on the inner side of the mounting frame 1. The edge of the sliding plate 18 is inserted into and slidably connected to the sliding groove 22. This constrains and guides the horizontal sliding stroke along the length of the mounting frame 1. Equally spaced groove plates 14, corresponding to the positions of the connecting strips 13, are provided on the crossbeams 17. The groove plates 14 are positioned along the width direction of the inner frame 2 and are therefore perpendicular to the crossbeams 17. The groove plates 14 enable quick-release for each connecting strip 13, and the crossbeams 17 also enable quick-release for the groove plates 14.

[0038] In terms of structure, the cross-section of the groove plate 14 is a U-shaped groove structure. The groove plate 14 is movably inserted into the connecting strip 13. Multiple fixing screws 15 pass through the groove plate 14. By inserting the groove plate 14 into the outside of the connecting strip 13 and passing the fixing screws 15 through and fixing them to the connecting strip 13, the connecting strip 13 and the groove plate 14 can be quickly fixed.

[0039] The slot plate 14 has centrally located cutouts 16 at both ends, the length of which corresponds to the length of the slot plate 14. Long bolts 19 pass through the cutouts 16, and their positions can be adjusted by sliding up and down along the cutouts 16, thereby adjusting the distance between the tightened crossbeam 17 and the side of the mounting frame 1. The nuts of the long bolts 19 are located inside the slot plate 14 and are blocked by the cutouts 16. The crossbeam 17 has through holes corresponding to the long bolts 19, and the long bolts 19 pass through these holes and are fitted with fastening nuts, thus fixing the crossbeam 17 to both ends of the slot plate 14. The crossbeam 17 can be adjusted up and down based on the length of the cutouts 16, facilitating the insertion or removal of the sliding plate 18 and the sliding groove 22 during assembly and disassembly. This enables quick-release modular assembly.

[0040] A connecting seat 20 is fixedly welded to the middle of the crossbeam 17 near the upper side or near the mounting plate 8. Vertical bolts 11 pass through the connecting seat 20 vertically. The vertical bolts 11 pass through the mounting hole at the end of the cylinder rod 10 and are secured with a nut to achieve the engagement between the stroke frame and the hydraulic cylinder 9. The extension end of the hydraulic cylinder 9 is locked to the stroke frame by only one vertical bolt 11; loosening this bolt disconnects the power connection.

[0041] During disassembly: Remove the upright bolt 11 to separate the cylinder rod 10 of the hydraulic cylinder 9 from the stroke frame. After that, the hydraulic cylinder 9 or the stroke frame can be disassembled and replaced separately depending on the damage.

[0042] Disassembling hydraulic cylinder 9: Remove the protective plate 21 to disassemble and replace hydraulic cylinder 9.

[0043] To disassemble the travel frame and sliding teeth 12: Loosen the nuts on the long bolts 19 on the upper and lower crossbeams 17, thereby sliding the crossbeams 17 towards the center. Remove the slide plate 18 from the slide groove 22 on the crossbeams 17 to detach it, thus disassembling the entire travel frame and sliding teeth 12. If individual sliding teeth 12 are damaged, the corresponding slot plate 14 and connecting strip 13 can be removed (by unscrewing the fixing screws 15) and replaced with new parts.

[0044] If some components are installed in reverse, the disassembly process can be reversed. The crossbeam 17 of the travel frame and the slot plate 14 adopt a sliding structure with a notch 16 and a long bolt 19. Without removing the mounting frame 1, the crossbeam 17 can be retracted to make the slide plate 18 exit the slide groove 22, and then the slide tooth 12 unit can be pulled out as a whole, so that the replacement of the slide tooth 12 or the hydraulic cylinder 9 can be completed by one person in five minutes.

[0045] For new parts installation: Insert the sliding teeth 12 between the grid bars 3, install the upper groove plate 14, fix the groove plate 14 and the connecting strip 13, install the two crossbeams 17, initially tighten the fastening nuts on the long bolts 19 (do not tighten), push the crossbeams 17 outward until the sliding strip is inserted into the sliding groove 22, tighten the fastening nuts, fix the crossbeams 17 and the groove plate 14 as an integral stroke frame structure, install the oil cylinder 9, fix the cylinder rod 10 to the connecting seat 20, install the upper guard plate 21, and the installation is complete.

[0046] Based on the above structure, the hydraulic cylinder 9-driven cleaning mechanism can significantly reduce the frequency of damage to the power component (hydraulic cylinder 9) during use, keeping the hydraulic cylinder 9 in an environment outside the sewage as much as possible, while also preventing collisions with foreign objects. The entire mechanism is easy to disassemble, thus simplifying maintenance operations, improving efficiency, and allowing for convenient replacement of some components, such as the inner frame 2 and sliding teeth 12, which are easily damaged. Other components can also be replaced independently, thereby reducing the cost of damaged parts.

Claims

1. A hydraulically driven mechanical bar, characterized in that, The device includes a rectangular mounting frame, within which an inner frame of the same size is fixed. The inner frame has equidistant grid strips along its height. One side of each grid strip has an upright connecting strip, and multiple sliding teeth are fixed on the connecting strip between the grid strips. These sliding teeth slide in engagement with the gaps in the grid strips. On the side of the connecting strip away from the grid strips, there are two horizontal beams, one upper and one lower. A sliding plate is located on the side of the horizontal beams closest to the mounting frame. The inner side of the mounting frame has a sliding groove that slides through the sliding plate. A hydraulic cylinder is fixed to the upper side of the mounting frame. One end of the hydraulic cylinder has a cylinder rod that extends and retracts along the length of the mounting frame. The end of the cylinder rod is detachably fixed to the middle of the upper horizontal beam.

2. The hydraulically driven mechanical grille according to claim 1, characterized in that, The inner frame is fixed to the mounting frame by multiple fasteners on its periphery.

3. The hydraulically driven mechanical grille according to claim 1, characterized in that, Multiple pressure frames and pressure strips are equidistantly arranged along the length of the inner frame. The pressure frames and pressure strips are arranged on both sides of the grid strips and extend relative to the width direction of the inner frame. The height of the pressure frame is adapted to the height of the inner frame. The pressure frame has corner plates at its upper and lower ends that are fixed to the inner frame by bolts, so that the pressure frame is in the shape of "[". Multiple clamping bolts located between the grid gaps pass through the pressure frames and pressure strips. The clamping bolts are located between the grid strips, and there is one and only one connecting strip between adjacent pressure frames.

4. The hydraulically driven mechanical grille according to claim 1, characterized in that, The upper side of the mounting frame is provided with a mounting plate extending horizontally to one side. The mounting plate is located on the side of the water outlet direction. The oil cylinder is fixed below the mounting plate and is set near one end of the mounting plate. The oil cylinder is covered with a protective plate. The protective plate is L-shaped and its sides are fixed to the mounting plate by fasteners. The protective plate has a row of strip holes along its length direction. The strip holes penetrate the vertical side and bottom side of the protective plate.

5. The hydraulically driven mechanical grille according to claim 1, characterized in that, The cylinder rod has a mounting hole at its end that passes through it from top to bottom. A connecting seat is fixedly welded to the middle of the crossbeam near the upper side. A vertical bolt passes through the connecting seat from top to bottom. The vertical bolt rod is used to pass through the mounting hole at the end of the cylinder rod and is fitted with a nut.

6. The hydraulically driven mechanical grille according to claim 1, characterized in that, The crossbeam and connecting strip are detached and fixed by a groove plate. The groove plate has a U-shaped cross-section and is movably inserted into the connecting strip. Multiple fixing screws pass through the groove plate. Cutouts are made at the center of both ends of the groove plate. The length of the cutouts corresponds to the length of the groove plate. Long bolts pass through the cutouts. The nuts of the long bolts are located inside the groove plate and are blocked by the cutouts. The crossbeam has through holes corresponding to the long bolts. The long bolts pass through the through holes and are fitted with fastening nuts.

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