Smearing device and process for improving appearance quality of prefabricated UHPC component

Abstract

The invention discloses a smearing device and process for improving the appearance quality of a prefabricated UHPC component. The smearing device comprises a flexible vibration roller and a U-shaped support, the U-shaped support is fixedly connected with a handle, a sealed feeding barrel is arranged on the U-shaped support, a plurality of discharging pipes are arranged at the bottom of the feeding barrel, and a feeding mechanism is arranged at the top of the feeding barrel; and a vibration motor is fixed in the vibration spring. The method further comprises a technological method of S1-S4. The feeding barrel is matched with the feeding mechanism and can be matched with a plurality of discharging pipes to achieve uniform discharging of the ultra-high performance concrete, the flexible vibration roller can vibrate while rolling, the ultra-high performance concrete is evenly smeared, and the flexible vibration roller can be matched with vibration of the defoaming column on smearing to conduct defoaming operation on an ultra-high performance concrete smearing layer. Therefore, no bubbles exist between the coating layer and the mold, and the surface appearance quality of the ultra-high performance concrete after demolding is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of building technology, and in particular to a coating device and process for improving the appearance quality of prefabricated UHPC components. Background Art

[0002] UHPC (ultra-high performance concrete) is a self-compacting material that combines ultra-high strength, ultra-high toughness and high durability, and can be cast into shape. Due to the ultra-high performance of UHPC, architectural designers can implement an integrated structural and decorative design, using UHPC materials to form the structure in one step. The structure has a clear water decorative effect as soon as it is demoulded, which not only reduces the weight of the structure, but also greatly reduces the construction process and saves construction costs.

[0003] In the existing production of ultra-high performance concrete (UHPC), to improve the appearance quality of UHPC components, the UHPC is generally first applied with a brush and then brushed onto the inner surface of the concrete mold. This pre-coating of the UHPC on the inner surface of the concrete mold effectively reduces the number of surface bubbles in the UHPC, thereby improving the appearance quality of the UHPC. However, brushing the UHPC onto the inner surface of the concrete mold results in uneven application of the UHPC, making it difficult to control the uniformity of the application, thus failing to ensure the appearance quality of the UHPC. Therefore, it is necessary to provide a coating device and process for improving the appearance quality of precast UHPC components. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a coating device and process for improving the appearance quality of prefabricated UHPC components.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is: Provided are a coating device and process for improving the appearance quality of prefabricated UHPC components. The device comprises a flexible vibration roller and a U-shaped bracket for mounting the flexible vibration roller. The U-shaped bracket is fixedly connected to a handle. A sealed feeding barrel is provided on the U-shaped bracket. A plurality of discharge pipes are provided at the bottom of the feeding barrel. A feeding mechanism is provided at the top of the feeding barrel. The feeding mechanism is used to cooperate with the discharge pipes to achieve uniform feeding. A vibration motor is fixed in the flexible vibration roller, and a vibration block is fixed to the output end of the vibration motor.

[0006] Furthermore, the flexible vibration roller includes a vibration spring, a rubber roller sleeve is provided on the outer side of the vibration spring, and a number of bubble removal columns are provided on the rubber roller sleeve. Fixed end covers are fixed at both ends of the vibration spring, and each fixed end cover is fixed to the U-shaped bracket through a sliding telescopic shaft. The U-shaped bracket is provided with a sliding hole that cooperates with the sliding telescopic shaft, and each fixed end cover is provided with a ball bowl hole. The sliding telescopic shaft is provided with a ball head limiting part that cooperates with the ball bowl hole, and the ball head limiting part is installed on the fixed end cover through a ball head limiting ring cover.

[0007] Furthermore, a return spring is sleeved on each of the sliding and telescopic shafts, and the return spring is located between the ball head limiting portion and the U-shaped bracket.

[0008] Furthermore, the debubble column is made of nylon or polypropylene.

[0009] Furthermore, an axial through hole is provided on the ball head limiting portion and the sliding telescopic shaft.

[0010] Furthermore, the feeding mechanism includes a barrel-shaped feeding pipe, a feed pipe and a feeding motor. The feed pipe is arranged obliquely upward on the feeding pipe, the feeding motor is fixed at the closed end of the feeding pipe, the open end of the feeding pipe is connected to the feeding cylinder, and the output end of the feeding motor passes through the inside of the feeding pipe and is fixed with a spiral blade.

[0011] Furthermore, a concrete pump is included. The concrete pump is connected to the feed pipe through a pipeline and is used to transport concrete.

[0012] Furthermore, a vibration bracket for mounting the vibration spring is fixed in the middle of the vibration spring. The vibration bracket is in a straight line shape and is provided with a mounting hole for mounting the vibration motor.

[0013] Furthermore, a radial opening is provided at the bottom of the discharge pipe, the radial opening is triangular or rectangular, and the discharge pipe is made of rubber.

[0014] A coating process of a coating device for improving the appearance quality of prefabricated UHPC components includes the following steps: S1. When preparing ultra-high performance concrete, a portion of the ultra-high performance concrete without reinforcing fibers is taken out for coating the mold, wherein the reinforcing fibers include steel fibers or organic fibers; S2. Prepare the mold and clean it in advance; S3. Use a coating device to coat the inner surface of the mold until all positions on the inner surface of the mold are coated with ultra-high performance concrete. Specifically: S31, start the feeding motor, concrete pump and vibration motor, and adjust the discharge of the discharge pipe; S32, the feeding mechanism continuously feeds the super high performance concrete into the feeding barrel, and when the feeding barrel is fully filled with the super high performance concrete, the super high performance concrete in the feeding barrel is continuously discharged from the discharge pipe under the continuous feeding operation of the feeding mechanism; S33, when the super high performance concrete is continuously discharged from the discharge pipe, the feeding motor and the concrete pump are controlled to stop working; S34, moving a plurality of discharge pipes to the place where the mold needs to be coated, so that the lower end of the discharge pipe and the bottom of the flexible vibration roller are in contact with the mold, and then the feeding motor and the concrete pump are started again to work, and the discharge pipe discharges at the coating position of the mold; S35, moving the coating device, using the flexible vibration roller to vibrate and smooth the coated super high performance concrete, and using the vibration generated by the flexible vibration roller and the bubble removing column to remove bubbles from the super high performance concrete to ensure that the coated concrete layer adheres uniformly S36, repeating steps S34-S35 to complete the super high performance concrete coating operation on the inner surface of the mold; S4, the super high performance concrete mixed with reinforcing fibers is poured into the mold by layering to complete the pouring process of the super high performance concrete.

[0015] The beneficial effects of the present application are: The coating device of the present application can form a uniform super high performance concrete layer on the inner surface of the mold, the feeding barrel cooperates with the discharge pipe to uniformly extrude the super high performance concrete, cooperates with the rolling coating of the flexible vibration roller to make the super high performance concrete layer more uniform, cooperates with the vibration motor arranged in the flexible vibration roller, and the flexible vibration roller cooperates with the vibration to better uniformly vibrate and coat the super high performance concrete, so that the super high performance concrete coating layer is more uniform, and the bubble removing column cooperates with the vibration to remove bubbles from the super high performance concrete coating layer, thereby ensuring the adhesion effect of the super high performance concrete coating layer on the inner surface of the mold, so that the contact surface of the super high performance concrete coating layer and the mold will not have bubbles, thereby ensuring the surface quality of the super high performance concrete after demolding, and effectively improving the appearance quality of the super high performance concrete component.

[0016] The feeding barrel of the present application cooperates with the feeding mechanism to uniformly discharge the super high performance concrete with a plurality of discharge pipes, the flexible vibration roller not only vibrates while rolling to uniformly coat the super high performance concrete, but also cooperates with the bubble removing column to remove bubbles from the super high performance concrete coating layer, thereby ensuring that there will be no bubbles between the coating layer and the mold, effectively improving the surface appearance quality of the super high performance concrete after demolding.

[0017] The flexible vibration roller of the present invention adopts a vibration spring and a rubber roller sleeve to form a coating main body. The vibration spring and the vibration spring can adapt to the coating surface and realize coating operations on flat and curved surfaces; between the two ends of the vibration spring and the sliding telescopic shaft, a spherical contact setting of a ball bowl hole and a ball head limit part is adopted, so that the end of the vibration spring can also better adapt to the curvature of the curved surface for fitting coating, so that the flexible vibration roller can adapt to the ultra-high performance concrete coating operation of the curved mold; a reset spring is provided between the ball head limit part and the U-shaped bracket. When the vibration spring and the rubber roller sleeve move on the curved surface, the sliding telescopic shafts at both ends of the vibration spring can cooperate to slide, and under the reset action of the reset spring, the deformation of the vibration spring can be better coordinated to perform the coating operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the overall structure of the coating device for improving the appearance quality of prefabricated UHPC components in the present invention Figure 1 ; Figure 2 Schematic diagram of the overall structure of the coating device for improving the appearance quality of prefabricated UHPC components in the present invention Figure 2 ; Figure 3 Schematic diagram of the overall structure of the flexible vibration roller; Figure 4 Schematic diagram of the internal structure of the flexible vibration roller Figure 2 ; Figure 5 for Figure 4 A partial enlarged view of point A in the middle; Figure 6 Schematic diagram of the working of the coating device for improving the appearance quality of prefabricated UHPC components in the present invention The main components in the figure are described as follows: 1. Flexible vibration roller; 11. Vibration spring; 12. Rubber roller sleeve; 13. Debubble column; 14. Vibration motor; 15. Fixed end cover; 16. Sliding telescopic shaft; 17. Ball head limiter; 18. Ball head limit ring cover; 19. Return spring; 2. U-shaped bracket; 3. Handle; 4. Feed barrel; 5. Discharge pipe; 6. Feed pipe; 7. Feed pipe; 8. Feed motor; 9. Switch. DETAILED DESCRIPTION

[0019] The specific embodiments of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all inventions and creations utilizing the concepts of the present invention are protected.

[0020] like Figure 1 and 2 As shown, the coating device for improving the appearance quality of prefabricated UHPC components includes a flexible vibration roller 1 and a U-shaped bracket 2 on which the flexible vibration roller 1 is mounted. The U-shaped bracket 2 is fixedly connected to a handle 3, which is provided with a silicone sleeve or sponge sleeve to facilitate the operator's grip and make it more comfortable. A sealed feed barrel 4 is provided on the U-shaped bracket 2. A plurality of discharge pipes 5 are provided at the bottom of the feed barrel 4. The inner diameter of the discharge pipe 5 is larger than the diameter of the aggregate. A feeding mechanism is provided at the top of the feed barrel 4. The feeding mechanism is used to cooperate with the discharge pipe 5 to achieve uniform feeding. A radial opening is provided at the bottom of the discharge pipe 5. The radial opening is triangular or rectangular. The discharge pipe 5 is made of rubber. The radial opening faces the side away from the flexible vibration roller 1. Two radial openings can be provided on each discharge pipe 5. The two radial openings are symmetrically arranged and face a direction perpendicular to the axis of the flexible vibration roller 1.

[0021] The feeding mechanism includes a barrel-shaped feeding pipe 6, a feed pipe 7, and a feeding motor 8. The feed pipe 7 is positioned obliquely upward on the feeding pipe 6. The feeding motor 8 is fixed to the closed end of the feeding pipe 6. The open end of the feeding pipe 6 is connected to the feeding drum 4. The output end of the feeding motor 8 extends into the interior of the feeding pipe 6 and is fixed with a spiral blade. A concrete pump is also included, connected to the feed pipe 7 via a pipeline, and is used to transport concrete. A small screw conveyor can also be used as the feeding mechanism.

[0022] like Figure 3 、 4 As shown in Figure 5, the flexible vibration roller 1 includes a vibration spring 11, and the outer surface of the vibration spring 11 is provided with a rubber roller sleeve 12. The rubber roller sleeve 12 is provided with a number of bubble removal columns 13. The bubble removal columns 13 are preferably made of nylon or polypropylene. Nylon or polypropylene has good hardness. The diameter of the bubble removal columns 13 is preferably 0.05mm-0.3mm, and the length is preferably 0.5mm-15mm. Fixed end caps 15 are fixed at both ends of the vibration spring 11. Each fixed end cap 15 is fixed to the U-shaped bracket 2 through a sliding telescopic shaft 16. The U-shaped bracket 2 is provided with a sliding hole that cooperates with the sliding telescopic shaft 16. A fluff layer can also be provided on the surface of the rubber roller sleeve 12. The fluff layer can be made of fluffy cloth for wall painting, specifically including wool or white pigeon down or a chemical fiber mixed material or foam material.

[0023] Each fixed end cap 15 is provided with a bowl hole, and the sliding and telescopic shaft 16 is provided with a ball head stopper 17 that cooperates with the bowl hole. The ball head stopper 17 is mounted on the fixed end cap 15 via a ball head stopper ring cover 18. The bowl hole and the spherical surface of the ball head stopper 17 are connected between the fixed end cap 15 and the sliding and telescopic shaft 16. This allows the end of the vibration spring 11 to swing within a small range between the U-shaped bracket 2, allowing the vibration spring 11 and the rubber roller 12 to better adapt to the coating operation on curved surfaces.

[0024] A return spring 19 is sleeved on each of the sliding and telescopic shafts 16, and is located between the ball head stop 17 and the U-shaped bracket 2. When the vibration spring 11 and the rubber roller 12 move on the curved surface, the sliding and telescopic shafts 16 at both ends of the vibration spring 11 can slide in coordination, and under the reset action of the return spring 19, the deformation of the vibration spring 11 can be better coordinated to perform the smearing operation.

[0025] A vibration motor 14 is fixed inside the flexible vibration roller 1, and a vibration block is fixed to the output end of the vibration motor 14. A vibration bracket for mounting the vibration spring 11 is fixed to the middle of the vibration spring 11. The vibration bracket is in a straight line shape, and a mounting hole for mounting the vibration motor 14 is provided on the vibration bracket. The vibration motor 14 is fixed on the vibration spring 11 and can drive the vibration spring 11 and the rubber roller sleeve 12 to vibrate, thereby utilizing the rubber roller sleeve 12 to achieve uniform application of ultra-high performance concrete. At the same time, the debubble column 13 on the rubber roller sleeve 12 can vibrate and debubble the applied ultra-high performance concrete, thereby improving the external auxiliary quality of the ultra-high performance concrete coating layer on the mold, and can effectively improve the appearance quality of the ultra-high performance concrete. The vibration motor 14, the vibration spring 11, the rubber roller sleeve 12 and the debubble column 13 cooperate to achieve uniform vibration application and vibration debubble removal of the ultra-high performance concrete, ensuring the adhesion quality of the ultra-high performance concrete coating layer on the mold.

[0026] An axial through hole is provided on the ball head limiting portion 17 and the sliding telescopic shaft 16 . The vibration motor 14 is connected to the PLC controller through a guide slip ring. The axial through hole facilitates the passage of the connecting wire of the vibration motor 14 .

[0027] Handle 3 is equipped with switches 9, which include a feed motor switch, a concrete pump switch, and a vibration motor switch. These switches control the feed motor 8, the concrete pump, and the vibration motor 14, respectively, thereby enabling continuous concrete application to the concrete mold. These switches are all located on handle 3 and are electrically connected to a PLC controller. These switches, the concrete pump switch, and the vibration motor switch, control the feed motor 8, the concrete pump, and the vibration motor 14 through the PLC controller.

[0028] A coating process for a coating device for improving the appearance quality of prefabricated UHPC components includes the following steps: Figure 6 , the thick black line represents the applied ultra-high performance concrete coating: S1. When preparing ultra-high performance concrete, a portion of the ultra-high performance concrete without reinforcing fibers is taken out for coating the mold, wherein the reinforcing fibers include steel fibers or organic fibers; S2. Prepare the mold and clean it in advance; S3. Use a coating device to coat the inner surface of the mold until all positions on the inner surface of the mold are coated with ultra-high performance concrete. Specifically: S31, start the feeding motor 8, the concrete pump and the vibration motor 14 to adjust the discharge of the discharge pipe 5; S32, the feeding mechanism continuously feeds the ultra-high performance concrete into the feeding barrel 4. When the ultra-high performance concrete fully fills the feeding barrel 4, the ultra-high performance concrete inside the feeding barrel 4 is continuously discharged from the discharge pipe 5 under the continuous feeding operation of the feeding mechanism; S33, when the ultra-high performance concrete is continuously discharged from the discharge pipe 5, the feeding motor 8 and the concrete pump are controlled to stop operation; S34, move the discharge pipes 5 to the position where the mold needs to be coated, so that the lower end of the discharge pipe 5 and the bottom of the flexible vibration roller 1 are in contact with the mold, and then start the feeding motor 8 and the concrete pump again, and the discharge pipe 5 is discharged at the coating position of the mold; S35, moving the coating device, using the flexible vibration roller 1 to vibrate and grind the applied ultra-high performance concrete, and simultaneously using the vibration generated by the flexible vibration roller and the defoaming column 13 to defoam the ultra-high performance concrete, to ensure that the applied concrete layer is evenly adhered; S36: Repeat steps S34-S35 to complete the ultra-high performance concrete coating operation on the inner surface of the mold; S4. The ultra-high performance concrete mixed with the reinforcing fiber is poured into the mold in layers to complete the ultra-high performance concrete pouring process.

Claims

1. A coating device for improving the appearance quality of prefabricated UHPC components, characterized in that: The invention comprises a flexible vibration roller (1) and a U-shaped bracket (2) for mounting the flexible vibration roller (1), wherein the U-shaped bracket (2) is fixedly connected to a handle (3), a sealed feeding cylinder (4) is provided on the U-shaped bracket (2), a plurality of discharge pipes (5) are provided at the bottom of the feeding cylinder (4), and a feeding mechanism is provided at the top of the feeding cylinder (4), and the feeding mechanism is used to cooperate with the discharge pipes (5) to achieve uniform feeding; A vibration motor (14) is fixed inside the flexible vibration roller (1), and a vibration block is fixed to the output end of the vibration motor (14).

2. The coating device for improving the appearance quality of prefabricated UHPC components according to claim 1 is characterized in that: The flexible vibration roller (1) comprises a vibration spring (11), the vibration spring (11) is externally covered with a rubber roller sleeve (12), the rubber roller sleeve (12) is provided with a plurality of bubble removal columns (13), both ends of the vibration spring (11) are fixed with fixed end covers (15), each of the fixed end covers (15) is fixed to a U-shaped bracket (2) via a sliding telescopic shaft (16), the U-shaped bracket (2) is provided with a sliding hole that cooperates with the sliding telescopic shaft (16), each of the fixed end covers (15) is provided with a ball bowl hole, the sliding telescopic shaft (16) is provided with a ball head limiting portion (17) that cooperates with the ball bowl hole, and the ball head limiting portion (17) is mounted on the fixed end cover (15) via a ball head limiting ring cover (18).

3. The coating device for improving the appearance quality of prefabricated UHPC components according to claim 2, characterized in that: The sliding telescopic shaft (16) is sleeved with a return spring (19), and the return spring (19) is located between the ball head limiting portion (17) and the U-shaped bracket (2).

4. The coating device for improving the appearance quality of prefabricated UHPC components according to claim 2, characterized in that: The debubble column (13) is made of nylon or polypropylene.

5. The coating device for improving the appearance quality of prefabricated UHPC components according to claim 1, characterized in that: Axial through holes are provided on the ball head limiting portion (17) and the sliding telescopic shaft (16).

6. The coating device for improving the appearance quality of prefabricated UHPC components according to claim 1, characterized in that: The feeding mechanism comprises a barrel-shaped feeding pipe (6), a feed pipe (7) and a feeding motor (8), wherein the feed pipe (7) is arranged obliquely upward on the feeding pipe (6), the feeding motor (8) is fixed to the closed end of the feeding pipe (6), the open end of the feeding pipe (6) is connected to the feeding cylinder (4), and the output end of the feeding motor (8) passes through the inside of the feeding pipe (6) and is fixed with a spiral blade.

7. The coating device for improving the appearance quality of prefabricated UHPC components according to claim 5, characterized in that: It also includes a concrete pump, which is connected to the feed pipe (7) through a pipeline and is used to transport concrete.

8. The coating device for improving the appearance quality of prefabricated UHPC components according to claim 1, characterized in that: A vibration bracket for mounting the vibration spring (11) is fixed in the middle of the vibration spring (11), the vibration bracket is in a straight line shape, and a mounting hole for mounting the vibration motor (14) is provided on the vibration bracket.

9. The coating device for improving the appearance quality of prefabricated UHPC components according to claim 1, characterized in that: A radial opening is provided at the bottom of the discharge pipe (5), and the radial opening is triangular or rectangular. The discharge pipe (5) is made of rubber.

10. A coating process for improving the appearance quality of prefabricated UHPC components using the coating device according to any one of claims 1 to 9, characterized in that: The steps include: S1. When preparing ultra-high performance concrete, a portion of the ultra-high performance concrete without reinforcing fibers is taken out for coating the mold, wherein the reinforcing fibers include steel fibers or organic fibers; S2. Prepare the mold and clean it in advance; S3. Use a coating device to coat the inner surface of the mold until all positions on the inner surface of the mold are coated with ultra-high performance concrete. Specifically: S31, start the feeding motor (8), the concrete pump and the vibration motor (14), and adjust the discharge of the discharge pipe (5); S32, the feeding mechanism continuously feeds the ultra-high performance concrete into the feeding barrel (4). When the ultra-high performance concrete fully fills the feeding barrel (4), the ultra-high performance concrete inside the feeding barrel (4) is continuously discharged from the discharge pipe (5) under the continuous feeding operation of the feeding mechanism; S33, when the ultra-high performance concrete is continuously discharged from the discharge pipe (5), the feeding motor (8) and the concrete pump are controlled to stop operation; S34, moving the plurality of discharge pipes (5) to the position where the mold needs to be coated, so that the lower end of the discharge pipe (5) and the bottom of the flexible vibration roller 1 are in contact with the mold, and then starting the feeding motor (8) and the concrete pump again, and the discharge pipe (5) is discharged at the coating position of the mold; S35, moving the coating device, using the flexible vibration roller 1 to vibrate and grind the applied ultra-high performance concrete, and simultaneously using the vibration generated by the flexible vibration roller and the defoaming column 13 to defoam the ultra-high performance concrete, to ensure that the applied concrete layer is evenly adhered; S36: Repeat steps S34-S35 to complete the ultra-high performance concrete coating operation on the inner surface of the mold; S4. The ultra-high performance concrete mixed with the reinforcing fiber is poured into the mold in layers to complete the ultra-high performance concrete pouring process.

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