A dustproof device for road and bridge construction

Abstract

The utility model discloses a dustproof device of road and bridge construction relates to bridge deck pavement technical field, including string drum body 100, the bottom of string drum body 100 is equipped with thread groove 208, the bottom of string drum body 100 is provided with the attached ring 202 outside, the inside of attached ring 202 is equipped with thread strip 207, the thread connection between thread groove 208 and thread strip 207, the bottom fixedly connected with transmission pipe 201 of attached ring 202. The utility model discloses through thread strip 207 and thread groove 208, the thread connection between thread strip 207 and thread groove 208 to support single person operation, and the dismounting time is less than or equal to 30s, adapts dynamic pouring demand, reduces the delay of construction period.

Description

Technical Field

[0001] This utility model relates to the field of bridge deck paving technology, and in particular to a dust prevention and protection device for road and bridge construction. Background Technology

[0002] Road and bridge construction involves many technical fields, among which bridge deck concrete pouring refers to the construction process of laying a cement concrete pavement layer on a concrete beam. Its main purpose is to protect the main structure of the bridge from direct wear from vehicle tires and erosion from rainwater, while also distributing the concentrated load of vehicle wheel weights, ensuring that the bridge deck is flat, durable, and compatible with the road surface in its location.

[0003] In the existing concrete pouring process for bridge deck paving, when the free fall height of concrete exceeds 2 meters, tremie pipes are often used to ensure the concrete falls slowly and evenly, reducing kinetic energy impact. However, these tremie pipes require manual control of their direction, during which concrete will splash onto workers. The alkaline substances and aggregate particles in the concrete may come into direct contact with the skin during splashing, causing chemical burns or mechanical abrasions. Furthermore, high-speed splashing concrete blocks may impact the worker's body, causing bruises, fractures, or even internal organ damage.

[0004] To address the issue of workers potentially being injured by splattered concrete when manually handling the tremie pipe, a 75° inclined baffle is installed on the worker's side of the pipe. This prevents concrete from splashing onto the worker while still allowing them to move the pipe. The 75° inclined baffle forms an effective barrier, blocking the path of concrete splash. According to fluid dynamics simulations, this angle can cover more than 90% of the splash dispersion range. The 75° inclination design preserves the worker's operating space; calculations show that at this angle, the horizontal distance between the baffle and the gripping point of the pipe is ≥40cm, sufficient for the worker's arm movement range.

[0005] However, in the existing use of tremie pipes, the concrete falls vertically inside the pipe, which can cause the concrete to flow too fast and splash. The splashed concrete accumulates at the edges of the formwork or around the reinforcing bars, resulting in a rough surface and exposed reinforcing bars, requiring additional repairs. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a dust protection device for road and bridge construction, which solves the problem that workers may be injured by splashed concrete when the tremie pipe is manually held.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A dust control and protection device for road and bridge construction includes a duct body 100. A threaded groove 208 is formed at the bottom end of the duct body 100. An attachment ring 202 is provided on the outer side of the bottom end of the duct body 100. A threaded strip 207 is formed inside the attachment ring 202. The threaded groove 208 and the threaded strip 207 are threadedly connected. A flow transmission pipe 201 is fixedly connected to the bottom end of the attachment ring 202. This allows the duct body 100 and the protection device to be connected.

[0008] As a further improvement of this utility model, a funnel opening 203 is fixedly connected to the end of the flow transmission tube 201 away from the attachment ring 202, a connecting block 204 is fixedly connected to the side of the flow transmission tube 201 away from the funnel opening 203, an arc-shaped protective plate 205 is fixedly connected to the side of the connecting block 204 away from the flow transmission tube 201, and a handle 206 is fixedly connected to the side of the arc-shaped protective plate 205 away from the connecting block 204. This provides a protective effect for the worker.

[0009] As a further improvement of this utility model, the flow transfer pipe 201 features a double-angle design, with each double angle ranging from 110° to 130°. The double angle prevents impeded concrete flow within the flow transfer pipe 201. The overall angle of the flow transfer pipe 201 (110°~130°) facilitates the alignment of the concrete with the ground. This double-angle design, through two angle transitions, makes the concrete flow path smoother and avoids sudden drops in local flow velocity. Furthermore, the overall tilt angle ensures that the outlet of the tremie pipe naturally points towards the pouring area, reducing the need for manual adjustments by workers.

[0010] As a further improvement of this utility model, the funnel opening 203 is funnel-shaped, with the larger opening fixedly connected to the side of the flow pipe 201. The internal funnel-shaped inclination angle of the funnel opening 203 is 45°~60°, which is used to prevent the concrete from splashing due to excessive flow velocity. The smaller opening of the funnel faces the ground, and combined with gravity, the concrete falls vertically in a concentrated manner, avoiding splashing caused by horizontal diffusion. Moreover, the smaller opening facing the ground, combined with the overall angle of the tremie pipe, forms a "funnel effect," allowing the concrete to naturally converge at the pouring point, reducing the frequency of manual adjustments by workers.

[0011] As a further improvement of this utility model, the arc-shaped protective plate 205 has an arc-shaped design, and the handle 206 is fixed to one side of the inner arc for gripping. The angle between the arc-shaped protective plate 205 and the attachment ring 202 is designed to be 70°~80°. The tilt angle between the arc-shaped protective plate 205 and the attachment ring 202 is used to prevent obstruction of the construction personnel's movement. The arc design causes falling concrete blocks or tools to slide along the curved surface to the ground, rather than being directly ejected into the construction area.

[0012] Compared with the prior art, the advantages of this utility model are as follows: 1. Through the threaded strip 207 and the threaded groove 208, the threaded connection between the threaded strip 207 and the threaded groove 208 supports single-person operation, with a disassembly and assembly time of ≤30s, adapting to dynamic casting requirements and reducing construction delays.

[0013] 2. Through the funnel opening 203, the 60° incline of the funnel opening 203 prevents excessive concrete flow velocity from causing splashing. The smaller opening of the funnel opening 203 faces the ground, and combined with gravity, the concrete falls vertically in a concentrated manner, avoiding splashing caused by horizontal diffusion.

[0014] 3. The angle between the arc-shaped protective plate 205 and the attached ring 202 is designed to be 75°, thus preventing obstruction of construction workers' movement through the tilt angle of the arc-shaped protective plate 205 and the attached ring 202. The arc structure of the arc-shaped protective plate 205 can disperse the impact force in the event of an accidental collision, and the 75° design makes the arc-shaped protective plate 205 and the attached ring 202 form an outwardly expanding protective area, while avoiding excessive occupation of the construction passage.

[0015] 4. Through the flow transmission pipe 201, the double 120° angled structure changes the flow direction, reducing aggregate accumulation at the corner and lowering the risk of blockage. The overall 120° angle causes the flow transmission pipe 201 to form a 120° angle with the ground, causing the concrete to form a concentrated flow stream at the outlet and reducing horizontal diffusion. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the present invention from another angle.

[0018] Figure 3 This is a three-dimensional structural diagram of the threaded bar 207 and the threaded groove 208 in the separated state of this utility model.

[0019] In the diagram: 100, main body of the spool; 201, flow tube; 202, attachment ring; 203, funnel opening; 204, connecting block; 205, arc-shaped protective plate; 206, handle; 207, threaded strip; 208, threaded groove. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] See attached document Figure 1 - Appendix Figure 3 A dustproof and protective device for road and bridge construction includes a duct body 100, a flow pipe 201, a funnel opening 203, an arc-shaped protective plate 205, a threaded strip 207, and a threaded groove 208.

[0023] In this embodiment, taking the existing bridge deck pavement concrete pouring process as an example, when this utility model is used, the threaded connection between the threaded strip 207 and the threaded groove 208 fixes the attachment ring 202 to the bottom outside of the tremie tube body 100. Due to the fixed connection between the attachment ring 202 and the flow pipe 201, and the funnel opening 203 fixed to the end of the flow pipe 201 away from the attachment ring 202, the funnel opening 203 is funnel-shaped, with the larger opening fixed to the side of the flow pipe 201. The funnel opening 203 has a 60° inclination angle inside, thus preventing excessive concrete flow velocity from causing splashing. The smaller opening of the funnel opening 203 faces the ground, and combined with gravity, the concrete falls vertically in a concentrated manner, avoiding splashing caused by horizontal diffusion. When the concrete enters the funnel opening 203 from the flow pipe 201, the 60° inclination angle causes a gradual change in the fluid direction, consuming some kinetic energy through friction and turbulence. According to fluid dynamics simulations, this angle can reduce the concrete outlet velocity by 20%~25% and shrink the splash radius to within 0.3m. Furthermore, the smaller opening of the bell-shaped nozzle facing the ground, combined with gravity, causes the concrete to fall vertically in a concentrated manner, avoiding splashing caused by horizontal diffusion. In actual engineering, this design can reduce concrete spillage by 90%, reducing cleanup time. The threaded connection between the threaded strip 207 and the threaded groove 208 supports single-person operation, with assembly and disassembly time ≤30s, adapting to dynamic pouring requirements and reducing construction delays.

[0024] The arc-shaped protective plate 205 is fixedly connected to the side of the flow pipe 201 via a connecting block 204. The arc-shaped protective plate 205 has an arc-shaped design, and a handle 206 is fixed to the inner arc side for gripping. The angle between the arc-shaped protective plate 205 and the attachment ring 202 is designed to be 75°, thus preventing obstruction of workers' movement through the tilt angle of the arc-shaped protective plate 205 and the attachment ring 202. Since the handle 206 is fixed to the inner arc side of the arc-shaped protective plate 205, it is convenient for workers to grip and lift the tremie drum body 100. The arc structure of the arc-shaped protective plate 205 can disperse the impact force during accidental collisions. The 75° design allows the arc-shaped protective plate 205 and the attachment ring 202 to form an outwardly expanding protective area, while avoiding excessive occupation of the construction passage. Moreover, the 75° tilt angle allows the arc-shaped protective plate 205 to smoothly transition with the tremie drum body, avoiding the formation of right-angle protrusions.

[0025] During the process of concrete entering the funnel opening 203 through the tremie pipe 100 and the transfer pipe 201, the transfer pipe 201 features a double-angle design, with both angles being 120°. This double angle prevents the concrete from flowing poorly within the transfer pipe 201. Furthermore, the overall 120° angle of the transfer pipe 201 facilitates the alignment of the concrete with the ground. The 120° angle design allows the concrete to flow in the transfer pipe, and the double 120° angle structure changes the flow direction, reducing aggregate accumulation at the corners and lowering the risk of blockage. Fluid dynamics simulations show that this angle can reduce concrete flow resistance by 15%–20% and improve flow velocity stability by more than 30%. Moreover, the double angle creates a gradual turning direction, avoiding sudden changes in flow velocity and aggregate segregation caused by sharp turns. The overall 120° angle also creates a 120° angle between the transfer pipe 201 and the ground, causing the concrete to form a concentrated flow stream at the outlet, reducing horizontal diffusion. In actual engineering projects, this angle can reduce concrete spillage by 90% and improve pouring accuracy to within ±5cm.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A dust control and protection device for road and bridge construction, comprising a duct body (100), characterized in that, The bottom end of the spool body (100) is provided with a threaded groove (208), and an attachment ring (202) is provided on the outside of the bottom end of the spool body (100). The attachment ring (202) is provided with a threaded strip (207) inside. The threaded groove (208) and the threaded strip (207) are threadedly connected. The bottom end of the attachment ring (202) is fixedly connected with a flow transmission tube (201).

2. The dust control and protection device for road and bridge construction according to claim 1, characterized in that, The end of the flow tube (201) away from the attachment ring (202) is fixedly connected to a funnel opening (203), the side of the flow tube (201) away from the funnel opening (203) is fixedly connected to a connecting block (204), the side of the connecting block (204) away from the flow tube (201) is fixedly connected to an arc-shaped protective plate (205), and the side of the arc-shaped protective plate (205) away from the connecting block (204) is fixedly connected to a handle (206).

3. The dust control and protection device for road and bridge construction according to claim 1, characterized in that, The flow pipe (201) has a double-angle design, and the size of the double angle of the flow pipe (201) is 110°~130°. The double angle is used to prevent the concrete from flowing poorly inside the flow pipe (201). The overall angle of the flow pipe (201) is 110°~130°. The overall angle of the flow pipe (201) is used to facilitate the concrete to be aligned with the ground.

4. A dust control and protection device for road and bridge construction according to claim 2, characterized in that, The funnel opening (203) is funnel-shaped, and the larger part of the funnel shape is fixedly connected to the side of the flow pipe (201). The funnel opening (203) has a funnel-shaped inclination angle of 45°~60° inside. The inclination is used to prevent the concrete from splashing due to excessive flow rate.

5. A dust control and protection device for road and bridge construction according to claim 2, characterized in that, The arc-shaped protective plate (205) is designed in an arc shape. The handle (206) is fixed on the inner arc side for gripping. The angle between the arc-shaped protective plate (205) and the attachment ring (202) is designed to be 70°~80°. The tilt angle between the arc-shaped protective plate (205) and the attachment ring (202) is used to prevent affecting the walking of construction personnel.

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