A culvert concrete surface flatness modifying device

Abstract

The utility model discloses a kind of culvert concrete surface flatness finishing device, the utility model mainly includes protective cover, driver, trowelling shovel, sliding block, the side of sliding block far from trowelling shovel is fixedly connected with universal wheel, the side of sliding block close to trowelling shovel is fixedly connected with scraper, sliding block upper end is provided with locking piece;Sliding block drives universal wheel and scraper vertical displacement to change position in sliding, so that the lower end of protective cover is far from ground, scraper displacement reaches trowelling shovel lower end, driver drives trowelling shovel rotation, trowelling shovel is contacted and scraped off mortar in rotation with scraper;The utility model solves the problem that device is difficult to transport and scraper is difficult to clean in culvert concrete trowelling operation, can effectively prolong the service life of device, improve construction efficiency and reduce physical labor of operating personnel.

Description

Technical Field

[0001] This application relates to the field of concrete leveling, specifically to a device for smoothing the surface of culvert concrete. Background Technology

[0002] Concrete surface smoothing devices for culverts (commonly known as concrete trowels) are key equipment in the construction of concrete structures such as tunnels and box culverts. Driven by a motor, a high-speed rotating alloy trowel or floating trowel assembly compacts, lifts, and finishes the concrete surface during the initial setting stage. Its core function is to eliminate pouring marks and localized unevenness, creating a high-precision flat surface. Protective covers prevent mortar splashing and avoid contact between rotating parts and formwork edges. Some heavy-duty units also integrate a variable frequency speed control system, dynamically adjusting the trowel speed according to the concrete slump to meet the finishing needs of different concrete grades, significantly improving the construction efficiency and surface quality of culvert floor slabs and sidewalls.

[0003] However, the device has revealed several structural defects in practical applications: while its protective cover serves as a guide and protector during operation, its bottom edge needs to continuously slide in contact with the concrete surface. This means that if it is dragged directly on the ground when not in operation, the protective cover is easily scratched or its positioning slider is worn down. In addition, the equipment is heavy, and frequent lifting and transportation puts a great strain on the physical strength of the operators, which can easily lead to muscle strain with long-term operation. At the same time, mortar residue is difficult to clean, and hardened concrete easily adheres to the gap between the rotating trowel and the support. The entire device needs to be lifted and flipped over for manual cleaning, which further increases the labor intensity of the operators. It is not only time-consuming and laborious, but may also damage the balance of the trowel.

[0004] Therefore, this application proposes a culvert concrete surface smoothness trimming device that allows for easy movement and cleaning of the trowel after the smoothing operation is completed. Utility Model Content

[0005] The purpose of this invention is to provide a device for smoothing the surface of culvert concrete, which aims to solve the aforementioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for smoothing the surface of culvert concrete, comprising: The protective cover is ring-shaped, with a mounting platform fixedly welded to its center, and a control lever for handheld control welded to the side of the mounting platform. The lower circumference of the driver is bolted to the mounting platform, and the output end of the driver extends downward through the mounting platform. The smoothing spatula has an array of evenly arranged circumferences, and the upper rear end of the smoothing spatula is fixedly connected to the output end of the driver via a connecting rod. The slider is slidably connected to the periphery of the protective cover. A caster wheel is fixedly connected to the side of the slider away from the trowel, and a scraper is fixedly connected to the side of the slider close to the trowel. A locking device is provided at the upper end of the slider. As the slider slides, it drives the caster wheel and scraper to change vertical position, so that the lower end of the protective cover is away from the ground. The scraper moves to the lower end of the screed, and the driver drives the screed to rotate. As the screed rotates, it contacts the scraper to scrape away the concrete slurry.

[0007] The sliding block drives the casters and scraper to slide vertically up and down along the protective cover. During operation, the bottom of the casters is higher than the bottom of the protective cover, and the scraper is positioned above the screed, without obstructing the work. After completion, the sliding block is pushed down and locked, bringing the casters into contact with the ground for easy movement and transport. Simultaneously, the scraper moves to the bottom of the screed, and restarting the screed rotation allows for quick removal of any uncured concrete mortar from the screed. This eliminates the need for operators to lift, rotate, or operate the entire device. This effectively extends the device's lifespan, improves construction efficiency, and reduces the physical labor of workers.

[0008] Furthermore, an array of slide blocks is evenly arranged around the circumference of the slider, and a slide groove is formed along the vertical direction on the side of the protective cover. The slider is connected to the protective cover with a limit through the slide groove.

[0009] Furthermore, the locking element includes: The connecting rod has its lower end fixedly connected to the upper end of the slider, and its upper end extends upward through the upper part of the protective cover. The connecting rod is slidably connected to the protective cover. The lower end of the circular pedal is welded and fixed to the upper end of the array connecting rod; Spring pin; its upper end is welded and fixed to the ring pedal, and its lower end is inserted into the protective cover.

[0010] Furthermore, the upper circumference of the protective cover is evenly provided with locking grooves, and the spring pin is inserted into the locking groove for two-stage locking. The scraper is a long strip structure, and the width of the scraper gradually decreases from bottom to top. The end of the operating lever away from the placement platform is fixedly provided with a hand-held part for easy hand operation, and the hand-held part is engraved with anti-slip texture.

[0011] Compared with existing technologies, it has the following beneficial effects: This utility model provides a device for smoothing the surface of culvert concrete. A slider drives a caster wheel and scraper to slide vertically up and down along a protective cover. During operation, the bottom of the caster wheel is higher than the bottom of the protective cover, and the scraper is positioned above the leveling shovel, without obstructing the work. After the work is completed, the slider is pushed downwards and locked, allowing the caster wheel to contact the ground for easy movement and transport. Simultaneously, the scraper moves to the lower end of the leveling shovel. Restarting the leveling shovel allows for quick removal of any unset concrete mortar from the shovel, eliminating the need for manual lifting and tilting of the entire device. This effectively extends the device's lifespan, improves construction efficiency, and reduces the physical labor of workers. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the culvert concrete surface flatness adjustment device of this utility model. Figure 2 This is a schematic diagram of the protective cover structure of a culvert concrete surface flatness adjustment device according to the present invention. Figure 3 This is a schematic diagram of the lower structure of a culvert concrete surface flatness adjustment device according to the present invention. Figure 4 This is a partially enlarged schematic diagram of part A of the present invention; Figure 5 This is a schematic diagram of the locking component structure of a culvert concrete surface flatness adjustment device according to the present invention.

[0013] In the diagram: 1-protective cover; 11-placement platform; 12-operating lever; 121-handheld part; 13-slide groove; 14-locking groove; 2-driver; 3-smoothing shovel; 4-slider; 41-caster wheel; 42-scraper; 43-locking part; 431-connecting rod; 432-ring pedal; 433-spring pin. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1 to 5 As shown, this utility model provides the following technical solution: a device for smoothing the surface of culvert concrete; comprising: The protective cover 1 is ring-shaped, with a mounting platform 11 fixedly welded to its middle part, and an operating lever 12 for hand-held control welded to the side of the mounting platform 11. The protective cover 1 has a multi-layered ring structure. Each layer is connected to the other by connecting rods and welded together to enhance the overall structural strength. The ring design makes it compatible with the rotation shape of the trowel 3. The protective cover 1 protects the trowel 3 during operation and prevents it from contacting the concrete wall or formwork at the edge of the culvert.

[0016] The lower periphery of the driver 2 is bolted to the mounting platform 11, and the output end of the driver 2 extends downward through the mounting platform 11. The driver 2 uses a servo motor and is equipped with a battery, so that the device can be used without a power supply, making it easier for operators to perform smoothing operations and smoothing coverage. A control switch is also provided, which is located at the end of the operating lever 12 away from the protective cover 1. The control switch controls the driver 2 by setting an electrical signal connection inside the operating lever 12 or by using a radio signal connection. In addition, the driver 2 uses a multi-stage speed regulation motor, which can switch the speed through a control switch to adapt to specific construction scenarios and operational needs.

[0017] The smoothing spatula 3 has an array of evenly arranged circumferences, and the upper rear end of the smoothing spatula 3 is fixedly connected to the output end of the driver 2 via a connecting rod. The slider 4 is slidably connected to the protective cover 1. A caster wheel 41 is fixedly connected to the side of the slider 4 away from the trowel 3. A scraper 42 is fixedly connected to the side of the slider 4 close to the trowel 3. A locking part 43 is provided at the upper end of the slider 4. As the slider 4 slides, it drives the universal wheel 41 and the scraper 42 to move vertically and change their positions, so that the lower end of the protective cover 1 is away from the ground, the scraper 42 moves to the lower end of the smoothing shovel 3, and the driver 2 drives the smoothing shovel 3 to rotate. As the smoothing shovel 3 rotates, it contacts the scraper 42 to scrape away the concrete slurry.

[0018] See Figure 3 The slider 4 is evenly arranged with multiple sets of casters 41, which can support the device simultaneously and ensure that the device remains balanced when not in operation. The slider 4 is connected to the casters 41 and the scraper 42 by welding. The connecting parts are made of high-strength alloy to ensure connection strength, extend service life and improve compressive strength.

[0019] See Figure 4 The protective cover 1 has a vertical groove 13 on its periphery. The number of grooves 13 is the same as the number of sliders 4. The grooves 13 are open at the bottom and have slide rails on both sides.

[0020] The slider 4 is connected to the protective cover 1 by a limited sliding connection through the slide groove 13. The sliding connection between the slider 4 and the slide groove 13 is limited by the slide rail, so that the slider 4 can only slide vertically along the length direction of the slide groove 13. At the same time, the slider 4 is limited and cannot be dislodged from the slide groove 13 or deflected. During operation, the slider 4 is positioned at the top of the chute 13, ensuring that the bottom of the caster wheel 41 is higher than the bottom of the protective cover 1, thus not affecting normal operation. At the same time, the scraper 42 is positioned higher than the leveling shovel 3. After the operation is completed, the operator places the device on the ground and pulls the entire device upward by fixing the locking piece 43. This causes the slider 4 to slide downward relative to the chute 13 and lock, driving the caster wheel 41 and the scraper 42 to move downward synchronously. The caster wheel 41 contacts the ground and lifts the protective cover 1, allowing the device to move normally on the ground via the caster wheel 41. The protective cover 1 is protected from contact with the ground and is not damaged. Additionally, when the scraper 42 moves to the lower end of the trowel 3, the driver 2 is restarted to rotate the trowel 3. The trowel 3 then contacts the upper end of the scraper 42, thus scraping away the concrete mortar below it. It should be noted that when moving the slider 4, the scraper 42 and the trowel 3 must be staggered to prevent collision between them. If they are in the same vertical position, the driver 2 can be activated to rotate the trowel 3 to a staggered state before proceeding.

[0021] As another embodiment, such as Figures 3 to 5 As shown, the locking element 43 includes: Connecting rod 431, the lower end of connecting rod 431 is fixedly connected to the upper end of slider 4, the upper end of connecting rod 431 extends upward through the upper part of protective cover 1, and connecting rod 431 is slidably connected to protective cover 1; The lower end of the ring-shaped pedal 432 is welded and fixed to the upper end of the array connecting rods 431; furthermore, a footrest that fits the human foot better can be welded onto the ring-shaped pedal 432 to facilitate the application of force by the operator. Spring pin 433; its upper end is welded and fixed to the annular pedal 432, and its lower end is inserted into the protective cover 1. The spring pin 433 is arc-shaped and has a certain thickness to enhance structural stability and locking strength.

[0022] See Figure 5 The upper circumference of the protective cover 1 is evenly provided with locking grooves 14, and the spring pin 433 is inserted into the locking groove 14 for two-stage locking. The locking structure between the spring pin 433 and the locking groove 14 can adopt conventional locking designs in the field, which are locked by pressing and unlocked by pressing; for example, a rotary inclined cam structure (i.e., a self-locking structure that guides the movement trajectory of the cam follower by utilizing the specific contour of the cylindrical cam groove, so that it falls precisely into the dead point / positioning point of the cam contour at the end of the stroke, such as a ballpoint pen locking structure) or a two-stage ratchet and pawl structure is used for locking and unlocking operations.

[0023] In addition, the scraper 42 has a long strip structure, and the width of the scraper 42 gradually decreases from bottom to top, thereby improving the structural strength of the scraper 42 and reducing the risk of breakage during long-term use.

[0024] See Figure 1 The end of the operating lever 12 away from the mounting platform 11 is fixedly provided with a handheld part 121 for easy hand operation.

[0025] In addition, the handle 121 is engraved with anti-slip texture.

[0026] The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this utility model. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of this utility model without departing from the scope of the technical solution of this utility model shall fall within the protection scope of this technical solution.

Claims

1. A device for smoothing the surface of culvert concrete, characterized in that... include: The protective cover (1) is ring-shaped, with a mounting platform (11) fixedly welded to its middle part, and an operating lever (12) for hand-held control is welded and fixed to the side of the mounting platform (11); The driver (2) is bolted to the mounting platform (11) at its lower periphery, and the output end of the driver (2) extends downward through the mounting platform (11); The smoothing spatula (3) has an array of evenly arranged circumferences. The upper part of the rear end of the smoothing spatula (3) is fixedly connected to the output end of the driver (2) through a connecting rod. The slider (4) is slidably connected to the protective cover (1) around the periphery. A universal wheel (41) is fixedly connected to the side of the slider (4) away from the trowel (3). A scraper (42) is fixedly connected to the side of the slider (4) close to the trowel (3). A locking part (43) is provided at the upper end of the slider (4). The slider (4) drives the universal wheel (41) and the scraper (42) to change their vertical position during sliding, so that the lower end of the protective cover (1) is away from the ground, the scraper (42) moves to the lower end of the trowel (3), the driver (2) drives the trowel (3) to rotate, and the trowel (3) contacts the scraper (42) to scrape away the concrete slurry during rotation.

2. The culvert concrete surface smoothness adjustment device according to claim 1, characterized in that, The slider (4) has an array of numbers evenly arranged around its circumference.

3. The culvert concrete surface smoothness adjustment device according to claim 2, characterized in that, The protective cover (1) has a groove (13) on its periphery along the vertical direction.

4. The culvert concrete surface smoothness adjustment device according to claim 3, characterized in that, The slider (4) is connected to the protective cover (1) with a limit via the slide groove (13).

5. The culvert concrete surface smoothness adjustment device according to claim 2, characterized in that, The locking element (43) includes: Connecting rod (431), the lower end of the connecting rod (431) is fixedly connected to the upper end of the slider (4), the upper end of the connecting rod (431) extends upward through the upper part of the protective cover (1), and the connecting rod (431) is slidably connected to the protective cover (1); The lower end of the ring-shaped pedal (432) is welded and fixed to the upper end of the connecting rod (431) of the array; A spring pin (433) is welded and fixed at its upper end to the annular pedal (432), and its lower end is inserted into the protective cover (1).

6. The culvert concrete surface smoothness adjustment device according to claim 5, characterized in that, The upper circumference of the protective cover (1) is evenly provided with locking grooves (14), and the spring pin (433) is inserted into the locking grooves (14) for two-stage locking.

7. The culvert concrete surface smoothness adjustment device according to claim 1, characterized in that, The scraper (42) has a long strip structure, and the width of the scraper (42) gradually decreases from bottom to top.

8. The culvert concrete surface smoothness adjustment device according to claim 1, characterized in that, The end of the operating lever (12) away from the mounting platform (11) is fixedly provided with a handheld part (121) for easy hand operation.

9. The culvert concrete surface smoothness adjustment device according to claim 8, characterized in that, The handle (121) is engraved with anti-slip texture.

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