Prefabricated embedded steel bar surface treatment equipment

Abstract

The utility model discloses a prefabricated embedded steel bar surface treatment device in the technical field of constructional engineering devices, which comprises a rust polishing mechanism and a concrete softener spraying mechanism, the rust polishing mechanism comprises a driving motor, the output shaft end of the driving motor is in transmission connection with a driving rod, and the end part of the driving rod is provided with a polishing disc; a mounting base is arranged on the upper portion of the polishing disc, a spray pipe of a softening agent spraying mechanism is connected to the side face of the mounting base, a conveying hose is connected to the upper end of the spray pipe and attached to the driving rod, the upper end of the conveying hose penetrates through the handheld base to be communicated with the softening liquid inlet connecting pipe, and handles facilitating supporting are further arranged on the two sides of the handheld base. The device is simple in structure and convenient to use, dust generated in the treatment process can be sucked in time, dust dissipation on a construction site is avoided, and the device is suitable for being used during reinforcing steel bar surface treatment in building construction.

Description

Technical Field

[0001] This utility model relates to the field of building engineering equipment technology, and in particular to a surface treatment device for precast and embedded steel bars, which is suitable for removing impurities such as concrete softening and rust from steel bar surfaces and for controlling surface roughness. Background Technology

[0002] Precast and embedded steel bars are widely used in building construction. However, during construction, concrete splashes from the pouring process easily adhere to the surface of the steel bars, and exposed steel bars are susceptible to environmental factors, leading to surface corrosion. Traditional steel bar rust removal methods mainly rely on manual operation, which is inefficient, has unstable rust removal results, and is time-consuming and labor-intensive, failing to meet the demands of modern building engineering for efficient and high-quality construction.

[0003] A surface treatment device for steel bars used in construction has been published in the Chinese Patent Database (Publication No.: CN 214519444U, Publication Date: October 29, 2021). The device includes a support platform, with first fixing plates fixedly installed on both the front and rear sides of the top of the support platform. A first adjusting screw is threaded into the center of the first fixing plate, and a mounting bracket is movably installed at one end of the first adjusting screw. This surface treatment device for steel bars allows the steel bars to be inserted into the positioning wheel and drive wheel on the left side. A second drive motor rotates the drive wheel, moving the steel bars. Simultaneously, the first drive motor drives a grinding roller on the output shaft and a transmission toothed belt, rotating multiple grinding rollers to remove rust from the steel bars as they move. The operation is relatively simple, reducing labor intensity, and requires minimal intervention from workers during rust removal, thus improving safety. The shortcomings of this device are: it requires multiple drive shafts and grinding rollers to grind and remove surface rust along the movement path of the steel bars, resulting in a complex structure and a large footprint; after grinding steel bars of the same specification, the gap between the two ends of the steel bars must be manually adjusted to accommodate the steel bar size, which is cumbersome to operate; in addition, dust is raised during the grinding process, and there are no dust removal measures, which has an adverse effect on the breathing of operators and affects their health. Utility Model Content

[0004] The purpose of this invention is to overcome the defects in the existing technology and provide a surface treatment device for precast and embedded steel bars. The device has a simple structure, is easy to use, and can promptly extract the dust generated during the treatment process, thus preventing dust from escaping from the construction site.

[0005] The purpose of this utility model is achieved as follows: a surface treatment device for precast and embedded steel bars, including a rust grinding mechanism and a concrete softener spraying mechanism. The rust grinding mechanism includes a drive motor, and a drive rod is drivenly connected to the output shaft of the drive motor. A polishing disc is installed at the end of the drive rod. A mounting seat is provided on the upper part of the polishing disc. A spray pipe of the softener spraying mechanism is connected to the side of the mounting seat. A delivery hose is connected to the upper end of the spray pipe. The delivery hose is arranged close to the drive rod. The upper end of the delivery hose passes through the handhold and is connected to the softener inlet pipe. Handles for easy support are also provided on both sides of the handhold.

[0006] In operation, this invention first sprays a concrete softener onto the surface of the steel bars that are covered with concrete using a concrete softening agent spraying mechanism, softening the concrete on the steel bar surface to facilitate subsequent grinding. Then, a rust removal mechanism grinds the concrete and rust on the steel bar surface to remove the concrete, rust, and other attached impurities, thus completing the cleaning of the steel bar surface. During the grinding process, a suction machine can be turned on to remove the dust generated during grinding, preventing dust from escaping from the grinding site and providing a certain degree of protection for the operators.

[0007] Compared with existing technologies, this device first sprays a softening liquid onto the surface of the reinforcing steel to reduce the hardness and strength of the surface concrete, thus softening the surface concrete and facilitating subsequent grinding. During the grinding process, a suction machine can be turned on to collect the dust generated during grinding and dispose of it uniformly, preventing the dust from escaping into the air and protecting the respiratory health of the operators. In addition, this device has a simple structure and is lightweight, and can be operated by simply gripping the handle, making it easy to use.

[0008] Furthermore, a polishing disc is installed at the bottom of the polishing disc, and a steel wire prong is provided at the bottom of the polishing disc for polishing and cleaning. The steel wire prong is densely arranged circumferentially along the bottom surface of the polishing disc. The polishing disc can also be replaced with a spiral polishing disc or a soft polishing disc to thoroughly clean impurities such as concrete, rust, and loose rust from the surface of the reinforcing steel.

[0009] Furthermore, a dust suction hood is installed on the upper part of the polishing disc. The diameter of the dust suction hood is 1.5 times the diameter of the polishing disc. A dust suction pipe is connected to the dust suction hood. The upper end of the dust suction pipe is connected to a suction machine located at the bottom of the handheld base. The suction machine is equipped with a dust box with a dust filter bag. Dust is trapped in the dust filter bag, and clean air is discharged through the air outlet of the suction machine.

[0010] Furthermore, the suction pipe is a retractable soft corrugated pipe, and the air volume of the suction machine is 1000~2000m³ / h.

[0011] Furthermore, the nozzle is an annular nozzle with an opening, and nozzles are evenly spaced on the inner surface of the nozzle. The nozzle is hollow inside, and the nozzles are connected to the inside of the nozzle. The softening liquid in the delivery hose is sprayed out through the nozzles and the nozzle.

[0012] Furthermore, the inner diameter of the nozzle is 30 mm. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] In the image above, 1 is the drive motor, 2 is the handle, 3 is the drive rod, 4 is the spray pipe, 5 is the nozzle, 6 is the grinding disc, 7 is the dust hood, 8 is the dust suction pipe, 9 is the delivery hose, 10 is the handheld base, 11 is the suction machine, and 12 is the softening liquid inlet pipe. Detailed Implementation

[0015] like Figure 1 The precast embedded steel bar surface treatment equipment shown includes a rust grinding mechanism and a concrete softener spraying mechanism. The rust grinding mechanism includes a drive motor 1, and a drive rod 3 is drivenly connected to the output shaft end of the drive motor 1. A polishing disc is installed at the end of the drive rod 3. A mounting seat is provided on the upper part of the polishing disc. A spray pipe 4 of the softener spraying mechanism is connected to the side of the mounting seat. A delivery hose 9 is connected to the upper end of the spray pipe 4. The delivery hose 9 is arranged close to the drive rod 3. The upper end of the delivery hose 9 passes through a handhold 10 and is connected to the softener inlet pipe 12. Handles 2 for easy support are also provided on both sides of the handhold 10.

[0016] A polishing disc 6 is installed at the bottom of the polishing disc. A steel wire prong is provided at the bottom of the polishing disc 6 for polishing and cleaning. The steel wire prong is densely arranged around the bottom surface of the polishing disc 6. The polishing disc 6 can also be replaced with a spiral polishing disc or a soft polishing disc to thoroughly clean the concrete, rust, floating rust and other impurities on the surface of the steel bars.

[0017] A dust hood 7 is installed on the upper part of the grinding disc 6. The diameter of the dust hood 7 is 1.5 times the diameter of the grinding disc 6. A dust suction pipe 8 is connected to the dust hood 7. The upper end of the dust suction pipe 8 is connected to the suction machine 11 located at the bottom of the handheld base 10. The suction machine 11 is equipped with a dust box with a dust filter bag. The suction machine 11 drives the fan blades to rotate and draw in air through the dust suction pipe 8. After being filtered by the dust filter bag, the dust is collected in the dust filter bag and discharged uniformly. Clean air is discharged through the air outlet of the suction machine 11, thereby preventing dust from escaping from the grinding site and protecting the respiratory health of the operators. The dust suction pipe 8 is a retractable soft corrugated pipe, and the air volume of the suction machine 11 is 1000~2000m³ / h.

[0018] The nozzle 4 is an annular nozzle with an opening. Nozzles 5 are evenly spaced on the inner surface of the nozzle 4. The nozzle 4 is hollow inside, and the nozzles 5 are connected to the inside of the nozzle 4. The softening liquid in the delivery hose 9 is sprayed out through the nozzles 5 and the nozzle 4. The inner diameter of the nozzle 4 is 30mm. The softening liquid can be an aminosulfonic acid softener to improve the chemical properties of the concrete surface, soften the concrete structure, thereby reducing the hardness and strength of the concrete and facilitating subsequent grinding.

[0019] In operation, this device is moved to the rebar grinding and cleaning work area. The softening liquid inlet pipe 12 is connected to the softening agent storage tank. The operator holds the handle 2 and places the spray pipe 4 onto the rebar to be treated. The softening liquid is sprayed onto the surface of the rebar through the nozzle 5. The inner diameter of the spray pipe 4 is 30mm, which can accommodate most specifications of rebar commonly used in construction. The softening liquid in the softening agent storage tank can be continuously supplied to the delivery hose 9 through a small corrosion-resistant booster pump. Then, the rust grinding mechanism grinds the concrete and rust on the surface of the rebar. The drive motor 1 drives the grinding disc 6 to rotate through the drive rod 3, and the speed can reach 500-2000 rpm. At rpm, the steel wire tentacles at the bottom of the grinding disc 6 are densely arranged circumferentially along the bottom surface of the grinding disc 6, forming dense contact with the surface of the reinforcing bar, which facilitates the removal of heavy rust on the surface of the reinforcing bar. The concrete attached to the surface of the reinforcing bar falls off during the grinding process. When fine polishing is required, the grinding disc 6 can be replaced with a soft polishing disc. During the grinding process, the suction machine 11 can be turned on simultaneously to extract and collect the dust generated by grinding, avoiding dust dispersion at the grinding site. The dust concentration is reduced by 80%, which significantly improves the construction environment and protects the respiratory health of operators. The rust removal efficiency of reinforcing bars by this device can reach 3m / min, the rust removal rate is ≥98%, and the surface roughness Ra is controlled within the range of 20~50 μm, which meets the requirements of GB / T13912-2020 "Technical Requirements and Test Methods for Hot-Dip Galvanized Coatings of Steel Components with Metallic Coatings", and is suitable for use in the surface treatment of reinforcing bars.

[0020] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A prefabricated embedded steel bar surface treatment apparatus, characterized by: Including rust polishing mechanism and concrete softener spraying mechanism, the rust polishing mechanism includes a driving motor, an output shaft end of the driving motor is drivingly connected with a driving rod, an end of the driving rod is provided with a polishing disc, an upper portion of the polishing disc is provided with a mounting seat, a side of the mounting seat is connected with a spray pipe of the softener spraying mechanism, an upper end of the spray pipe is connected with a conveying hose, the conveying hose is arranged close to the driving rod, an upper end of the conveying hose is communicated with a softener inlet pipe through a hand-held seat, both sides of the hand-held seat are further provided with handles for conveniently holding.

2. A precast pre-embedded steel reinforcement surface treatment apparatus as claimed in claim 1, wherein: A polishing piece is mounted at a bottom of the polishing disc, and a steel wire feeler for polishing and cleaning is arranged at a bottom of the polishing piece.

3. A precast pre-sleeved rebar surface treatment apparatus as described in claim 2, wherein: A dust suction cover is mounted at an upper portion of the polishing piece, the dust suction cover has a diameter of 1.5 times of a diameter of the polishing piece, a dust suction pipe is connected to the dust suction cover, an upper end of the dust suction pipe is connected with a suction machine arranged at a bottom of the hand-held seat, the suction machine is provided with a dust box with a dust filtering bag, dust is intercepted by the dust filtering bag, and clean air is discharged through an air outlet of the suction machine.

4. A precast pre-sleeved rebar surface treatment apparatus as described in claim 3, wherein: The dust suction pipe is a flexible corrugated pipe, and an air volume of the suction machine is 1000-2000 m³ / h.

5. A precast pre-embedded steel reinforcement surface treatment apparatus as claimed in claim 1, wherein: The spray pipe is a ring-shaped spray pipe with openings, inner circle surfaces of the spray pipe are provided with nozzles at equal intervals, the spray pipe is hollow, and the nozzles are communicated with the inside of the spray pipe, so that the softener in the conveying hose is sprayed out through the nozzles and the spray pipe.

6. A precast pre-sleeved rebar surface treatment apparatus as described in claim 5, wherein: The inner circle diameter of the spray pipe is 30 mm.

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