A surface roughening device for a concrete precast composite floor production line

Abstract

The application belongs to the technical field of prefabricated reinforced concrete structure manufacturing, in particular to a surface roughening device for a prefabricated concrete composite floor production line, comprising a rack, a guide roller mounted on the rack, an electric push rod mounted on the rack, an installation rod mounted on the electric push rod, a slide ring and an extrusion capsule alternately mounted on the installation rod, a roughening knife mounted on the slide ring, the mutually contacting sides of the slide ring and the extrusion capsule being mutually bonded, a flow guide cavity being formed in the installation rod, the flow guide cavity sending or discharging the expansion medium from the outside into or out of the extrusion capsule, a protruding strip being arranged on the surface of the installation rod, a sliding groove being formed in the slide ring, the sliding groove and the protruding strip being mutually matched, and a rubber layer being mounted on the surface of the roughening knife; the application has a simple structure, the distance between the roughening knives is adjusted through the expansion of the extrusion capsule, and the difficulty and workload of adjusting the distance between the roughening knives are reduced.

Description

Technical Field

[0001] This invention belongs to the field of reinforced concrete precast concrete structure manufacturing technology, specifically a surface roughening device for a precast concrete composite floor slab production line. Background Technology

[0002] Composite floor slabs are one of the main components in prefabricated concrete structures, consisting of a precast base slab and post-cast concrete.

[0003] The precast base slabs are manufactured in the factory. During the manufacturing process, the mold is cleaned and a release agent is applied. Then, the steel mesh is tied and fixed inside the mold, and the embedded parts are installed. After that, concrete is poured into the mold and vibrated to ensure that the concrete is fully compacted and air bubbles are eliminated. Before the concrete initially sets and is not fully hardened, the surface of the precast base slab is roughened. Then, the concrete component is cured to accelerate the strength gain. After curing, the concrete component reaches the predetermined strength and is demolded. After that, the concrete component undergoes post-treatment and strength testing. The precast base slabs that meet the production standards are hoisted to the stacking area for storage. When the precast base slabs are to be used, they are transported to the construction site for assembly and post-concrete pouring.

[0004] The precast base slab is not only a component of the floor slab structure, but also a permanent formwork for the cast-in-place reinforced concrete composite layer. After the structure is formed, the joint performance of the precast base slab and the post-cast composite layer is a key factor in ensuring the load-bearing performance of the composite floor slab. Therefore, the bonding quality of the composite surface between the precast base slab and the post-cast composite layer is particularly important. If the bonding quality of the composite surface is poor, the composite floor slab will experience two separate stresses under load, failing to achieve overall load-bearing capacity and posing potential risks to the application of composite floor slabs in engineering projects.

[0005] To improve the bonding quality of the composite surface and increase the bonding force between the composite slab and the upper cast-in-place concrete, the precast base slab needs to be roughened during production to increase the roughness of the composite surface. According to the standard "Code for Acceptance of Construction Quality of Prefabricated Structures" DGJ32 / J184-2016, the roughness is specified as follows: the rough surface of the upper part of the composite component should meet the design requirements. When there are no specific requirements for the rough surface in the design, roughening or chiseling methods can be used to make the rough surface. The depth of the rough surface should not be less than 4mm.

[0006] In the existing precast slab production process, the common roughening method during the roughening process is as follows: when the composite slab passes through the roughening station of the production line, the roughening device lowers the roughening plate to begin roughening; after the composite slab passes, the roughening device raises the roughening plate to await the arrival of the next composite slab. Simultaneously, when roughening precast composite slabs with different thicknesses and roughness requirements, the spacing between the roughening blades needs to be adjusted. However, the spacing between the roughening blades on existing roughening devices is fixed, making it difficult or cumbersome to adjust as needed. Alternatively, different specifications of roughening devices are used to roughen different types of composite slabs separately. This results in only precast concrete structural components with a fixed roughness being produced during roughening, making it impossible to adjust the roughness. Furthermore, after roughening, sand and gravel aggregates from the concrete may be picked up from both sides of the texture, affecting the roughening effect and the normal progress of subsequent processes. Summary of the Invention

[0007] To overcome the shortcomings of existing technologies, this invention proposes a surface roughening device for a precast concrete composite floor slab production line. The spacing of the roughening blades can be adjusted as needed to adapt to the roughening requirements of concrete components with different thicknesses and roughness requirements. Furthermore, the sand and gravel aggregates that may be picked up on both sides of the texture after roughening are scraped and smoothed to ensure the roughening effect.

[0008] The technical solution adopted by the present invention to solve its technical problem is: the surface roughening device for a precast concrete composite floor slab production line of the present invention includes a frame, a guide roller is installed on the frame, and the guide roller moves the mold table on which the composite slab is placed;

[0009] An electric push rod is mounted on the frame, a lifting plate is mounted on the electric push rod, a mounting rod is mounted on the lifting plate via a mounting seat, a brushing knife is mounted on the mounting rod, a fixed seat is mounted on the frame, and a guide rod is mounted on the lifting plate, the guide rod being slidably mounted on the fixed seat;

[0010] The mounting rod is alternately equipped with slip rings and compression bladders. The scribing knife is installed at the lower end of the slip rings. There is a magnetic attraction between the slip rings. The slip rings and the sides of the compression bladders that are in contact with each other are bonded together. A flow guide cavity is opened in the mounting rod. The flow guide cavity is connected to an external control mechanism through a connecting pipe. The flow guide cavity is interconnected with the compression bladder. The flow guide cavity sends the expansion medium into or out of the compression bladder.

[0011] The mounting rod has a raised strip on its surface, the slip ring has a groove that matches the raised strip, and the surface of the brushing knife is covered with a rubber layer.

[0012] Preferably, the mounting rod is symmetrically equipped with limit blocks, the brushing knife is located between the two limit blocks, the limit blocks are fixed to the mounting rod by screws, and the surface of the mounting rod is engraved with size markings;

[0013] The limiting block has an abutment rod installed on the side facing the brushing knife, and the abutment rod is in contact with the end face of the slip ring.

[0014] Preferably, a connecting block is installed on the slip ring, an mounting cylinder is installed on the connecting block, and a rotating shaft is installed on the brushing knife, with the rotating shaft rotatably mounted inside the mounting cylinder;

[0015] A spring is installed between the brushing blade and the connecting block, and the spring is symmetrically installed on both sides of the rotating shaft along the width direction of the brushing blade.

[0016] Preferably, the two ends of the spring are respectively connected to the connecting block and the brushing knife by fixing pins, and there is a gap between the connecting block and the brushing knife, which serves as space for the spring to undergo torsional deformation;

[0017] The spring has a tendency to contract in its initial state.

[0018] Preferably, a fixing frame is installed on the mounting rod, a second rotating shaft is installed on the fixing frame, and a smoothing roller is installed on the second rotating shaft. The smoothing roller is in contact with the surface of the laminated plate.

[0019] The lower end of the brushing knife is beveled, and the beveled surface of the brushing knife contacts the laminated plate first, while the brushing knife contacts the laminated plate first relative to the smoothing roller.

[0020] Preferably, the smoothing roller is made of rubber material, the smoothing roller has a deformation cavity, the rotating shaft has a connecting cavity, the connecting cavity is connected to an external air source, and the deformation cavity and the connecting cavity are interconnected.

[0021] The fixing bracket does not contact the protruding strip on the mounting rod.

[0022] Preferably, after the texturing device completes the texturing process, it controls the compression bladder to periodically expand and contract, causing the compression bladder to drive the texturing blade to vibrate.

[0023] Preferably, the compression bladder is a hydraulic bladder, the expansion medium is hydraulic oil, and a solenoid valve is installed at one end of the connecting pipe near the mounting rod. The solenoid valve opens and closes rapidly when the hydraulic oil in the compression bladder is discharged.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. The surface roughening device for a precast concrete composite floor slab production line of the present invention, by setting a slip ring, an extrusion bladder, and a limiting block, allows the operator to adjust the position of the limiting block according to the size markings when it is necessary to adjust the spacing of the roughening blades to roughen composite slabs with different thicknesses and roughness requirements. Then, hydraulic oil is injected into the extrusion bladder to expand it, thereby pushing the slip ring and the roughening blades to move and adjust the spacing of the roughening blades. At the same time, the limiting block restricts the adjustment range of the roughening blade spacing, reducing the difficulty of adjusting the roughening blade spacing by the expansion of the extrusion bladder, avoiding the need for multiple adjustments, and improving the uniformity and accuracy of the spacing between the roughening blades after adjustment.

[0026] 2. The surface roughening device for a precast concrete composite floor slab production line of the present invention, by setting up a connecting block, roughening, rotating shaft, spring, and smoothing roller, under the mutual cooperation of the spring and the extrusion bladder, when the roughening blade encounters obstacles such as steel bars and trusses in the composite slab, the roughening blade can be affected by the force of the obstacle, causing the roughening blade to deflect and twist, so that the roughening blade can pass over the obstacle, avoiding interference or forced collision between the roughening blade and the obstacle, which would damage the roughening blade and affect the normal operation of the roughening device. Attached Figure Description

[0027] The invention will now be further described with reference to the accompanying drawings.

[0028] Figure 1 This is a perspective view of the texturing device of the present invention;

[0029] Figure 2 This is a schematic diagram of the installation of the brushing knife in the brushing device of the present invention;

[0030] Figure 3 This is a schematic diagram of the smoothing roller in the roughening device of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the brushing knife in the brushing device of the present invention;

[0032] Figure 5 yes Figure 1 Enlarged view of a portion of point A in the middle;

[0033] Figure 6 yes Figure 2 Enlarged view of a section at point B in the middle;

[0034] In the diagram: Frame 1, Fixed base 11, Guide roller 12, Electric push rod 2, Lifting plate 21, Guide rod 22, Mounting base 23, Mounting rod 3, Protruding strip 31, Guide cavity 32, Connecting pipe 33, Scrubbing knife 4, Slip ring 41, Connecting block 411, Mounting cylinder 412, Rotating shaft one 413, Spring 414, Fixing pin 415, Squeezing bladder 42, Smoothing roller 5, Rotating shaft two 51, Deformation cavity 52, Fixed frame 53, Limiting block 6, Abutment rod 61, Mold table 7, Stacking plate 8. Detailed Implementation

[0035] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0036] like Figures 1 to 6 As shown, the surface roughening device for a precast concrete composite floor slab production line of the present invention includes a frame 1, on which a guide roller 12 is installed, and the guide roller 12 moves the mold table 7 on which the composite slab 8 is placed.

[0037] An electric push rod 2 is installed on the frame 1. A lifting plate 21 is installed on the electric push rod 2. An mounting rod 3 is installed on the lifting plate 21 via a mounting seat 23. A brushing knife 4 is installed on the mounting rod 3. A fixed seat 11 is installed on the frame 1. A guide rod 22 is installed on the lifting plate 21. The guide rod 22 is slidably installed on the fixed seat 11.

[0038] Slip rings 41 and compression bladders 42 are alternately mounted on the mounting rod 3. The buffing knife 4 is mounted on the lower end of the slip rings 41. There is a magnetic attraction between the slip rings 41. The sides of the slip rings 41 and the compression bladder 42 that are in contact with each other are bonded together. A flow guide cavity 32 is opened in the mounting rod 3. The flow guide cavity 32 is connected to an external control mechanism through a connecting pipe 33. The flow guide cavity 32 is interconnected with the compression bladder 42. The flow guide cavity 32 sends the expansion medium into or out of the compression bladder 42.

[0039] The mounting rod 3 has a raised strip 31 on its surface, the slip ring 41 has a sliding groove, the sliding groove matches the raised strip 31, and the surface of the brushing knife 4 is covered with a rubber layer.

[0040] In the production process of precast composite slabs for concrete components, the surface of the mold is first cleaned to remove impurities. Then, a release agent is applied to the mold surface. Next, the cut steel bars are welded or tied into a steel mesh. The processed steel mesh is placed on the mold and tied and fixed. Necessary embedded parts are then installed inside the mold. Finally, a concrete placing boom is used to evenly pour concrete onto the mold. After pouring, the concrete is vibrated to ensure thorough compaction and eliminate air bubbles. Finally, before the concrete initially sets, the surface of the composite slab is roughened. The process involves creating a rough surface on the composite slab. Afterward, the mold and concrete are placed together in a curing device for curing. Once curing is complete and the concrete component reaches its predetermined strength, it is demolded. Following this, the demolded concrete component undergoes cleaning, repair, and other post-treatments. Simultaneously, test blocks prepared under the same conditions are subjected to strength testing. After passing the tests, the precast composite slab is hoisted to the storage area and stored for natural curing to the specified age. During the roughening process, the mold passes through a roughening device, allowing the roughening blade to roughen the surface of the composite slab.

[0041] During operation, the controller controls the electric push rod 2 to move, causing the lifting plate 21 to rise and the guide rod 22 to move upward, which in turn causes the mounting rod 3 and the brushing knife 4 to move upward, so that the lower end of the brushing knife 4 is above the edge of the mold table 7, thus preventing interference and collision between the two when the mold table 7 passes under the brushing knife 4.

[0042] When the mold table 7 moves on the roughening device via the guide roller 12 and the edge of the mold table 7 has passed the roughening knife 4, the controller controls the mold table 7 to stop moving. At the same time, the controller controls the electric push rod 2 to move in the opposite direction, driving the lifting plate 21 to move downward, so that the mounting rod 3 and the roughening knife 4 descend until the lower end of the roughening knife 4 is inserted into the surface of the laminated plate 8 on the mold table 7. After that, the controller controls the mold table 7 to continue moving, so that the roughening knife 4 completes the roughening action on the surface of the laminated plate 8. At the same time, when the mold table 7 is about to completely pass under the roughening knife 4 and the roughening knife 4 has completed the roughening, the controller controls the roughening knife 4 to rise, thereby avoiding interference and collision between the roughening knife 4 and the edge of the mold table 7, so that the roughening knife 4 is in the raised state, waiting for the subsequent roughening treatment of the laminated plate 8.

[0043] Meanwhile, by controlling the raising and lowering of the mounting rod 3 and the brushing knife 4 through the electric push rod 2, the depth of the marks made by the brushing knife 4 on the surface of the laminated plate 8 can be easily adjusted, so that the surface of the laminated plate 8 can be brushed to obtain consistent groove depth and good groove straightness, ensuring stable and good brushing effect. Thus, it can be adjusted according to the laminated plate 8 of different thicknesses, expanding the applicable range of the brushing device.

[0044] Meanwhile, since the slip ring 41 and the extrusion bladder 42 are alternately installed on the mounting rod 3, when it is necessary to perform surface roughening treatment on the composite plate 8 with different thicknesses and surface roughness requirements, the controller controls the external control mechanism to send the expansion medium into the extrusion bladder 42, causing the extrusion bladder 42 to expand, which in turn drives the slip ring 41 to move on the mounting rod 3, increasing or decreasing the distance between the slip rings 41, thereby adjusting the distance between the roughening blades 4 to adapt to the composite plate 8 with different thicknesses and surface roughness requirements, further expanding the application range of the roughening device. At the same time, adjusting the distance between the roughening blades 4 through the extrusion bladder 42 is relatively convenient and quick, reducing the workload of the staff in adjusting the roughening blades 4.

[0045] Meanwhile, due to the magnetic attraction between the slip rings 41 and the bonding of the surfaces of the slip rings 41 and the compression bladder 42, there is a tendency for the gap between the buffing blades 4 to decrease. Thus, the gap between the buffing blades 4 can be adjusted stably and quickly when the compression bladder 42 expands or contracts.

[0046] Meanwhile, since the surface of the ribbing knife 4 is covered with a rubber layer, when the lower end of the ribbing knife 4 is inserted into the composite plate 8 for ribbing, the rubber layer isolates the ribbing knife 4 from the concrete, minimizing direct contact between the ribbing knife 4 and the concrete, and preventing inconsistent ribbing depth after the ribbing knife 4 is severely worn, which would affect the ribbing effect and reduce the service life of the ribbing knife 4.

[0047] Meanwhile, the matching between the protrusion 31 on the mounting rod 3 and the sliding groove on the slip ring 41 ensures that the brushing knife 4 always remains vertical, preventing the brushing knife 4 from rotating relative to the mounting rod 3 and affecting the normal brushing process.

[0048] In one embodiment of the present invention, the mounting rod 3 is symmetrically equipped with limiting blocks 6, the brushing knife 4 is located between the two limiting blocks 6, the limiting blocks 6 are fixed on the mounting rod 3 by screws, and the mounting rod 3 is engraved with size markings.

[0049] The limiting block 6 is equipped with an abutment rod 61 on the side facing the brushing knife 4, and the abutment rod 61 is in contact with the end face of the slip ring 41.

[0050] Because the mounting rod 3 is equipped with symmetrically distributed limiting blocks 6, the adjustment distance between the limiting blocks 6 is fixed. Simultaneously, since the compression bladders 42 are interconnected through the guide cavity 32, when the external control mechanism sends the expansion medium into the guide cavity 32 and then into the compression bladders 42, each compression bladder 42 expands to the same size, thereby causing the slip rings 41 and the roughening blades 4 to distribute evenly. In this situation, when roughening laminated plates 8 with different thicknesses and roughness requirements, the operator adjusts the position of the limiting blocks 6 according to the size markings on the mounting rod 3. Adjustments are made to change the range of adjustment distance. After the compression bladder 42 expands, the buffing blades 4 will be evenly distributed within the adjustment distance range, and the spacing between each buffing blade 4 will be precise. This avoids the relatively long adjustment time required when adjusting by expanding the compression bladder 42, as well as the relatively high difficulty or need for multiple adjustments when adjusting the spacing between the buffing blades 4 by expanding the compression bladder 42. This speeds up the adjustment of the spacing between the buffing blades 4, reduces the difficulty of adjusting the spacing between the buffing blades 4, and improves the uniformity and accuracy of the spacing between the buffing blades 4 after adjustment.

[0051] At the same time, the limiting block 6 contacts the slip ring 41 near both ends of the mounting rod 3 through the abutment rod 61, so that the distance between the limiting block 6 and the slip ring 41 is relatively large, so as to avoid the limitation block 6 being too close to the slip ring 41, which would make it inconvenient for the staff to see the size markings and adjust the position of the limiting block 6 on the mounting rod 3.

[0052] In one embodiment of the present invention, a connecting block 411 is installed on the slip ring 41, an mounting cylinder 412 is installed on the connecting block 411, and a rotating shaft 413 is installed on the brushing knife 4, with the rotating shaft 413 rotatably installed inside the mounting cylinder 412.

[0053] A spring 414 is installed between the brushing blade 4 and the connecting block 411. The spring 414 is symmetrically installed on both sides of the rotating shaft 413 along the width direction of the brushing blade 4.

[0054] Due to factors such as vibration, error or offset caused by operator operation, the position of the mold table 7 may be offset when passing through the roughening device, which may cause the position of the steel bars and trusses in the composite plate 8 on the mold table 7 to change. That is, there is a possibility that the roughening knife 4 may accidentally touch the steel bars, trusses, etc. in the composite plate 8.

[0055] Meanwhile, since the brushing blade 4 and the connecting block 411 are symmetrically distributed on both sides of the rotating shaft 413, the brushing blade 4 is restricted from rotating by the springs 414. Thus, under normal conditions, the brushing blade 4 and the connecting block 411 are parallel to each other and there is no angle between them. At the same time, due to the presence of the springs 414, when the brushing blade 4 is subjected to a large external force, the brushing blade 4 still has the possibility of deflection and torsion.

[0056] Therefore, through the cooperation of spring 414 and compression bladder 42, when the brushing knife 4 brushes the surface of the composite plate 8, if the brushing knife 4 encounters an obstacle, such as the steel bars or trusses inside the composite plate 8, the obstacle will compress the brushing knife 4, causing the brushing knife 4 to be subjected to a lateral force. That is, under the action of spring 414, the brushing knife 4 twists and deflects around the pivot 413 as the center line, so that the brushing knife 4 passes over the obstacle. Afterwards, the brushing knife will return to the initial position under the action of spring 414, completing the brushing work. During this process, the deflection and twisting of the brushing knife 4 prevents interference or forced collision between the brushing knife 4 and the steel bars or trusses inside the composite plate 8, and prevents damage to the brushing knife 4 and affecting the normal operation of the brushing device.

[0057] In one embodiment of the present invention, the two ends of the spring 414 are respectively connected to the connecting block 411 and the brushing knife 4 by fixing pins 415. There is a gap between the connecting block 411 and the brushing knife 4, which serves as the space for the spring 414 to undergo torsional deformation.

[0058] The spring 414 has a tendency to contract in its initial state;

[0059] The two ends of the spring 414 are connected to the connecting block 411 and the brushing knife 4. With the tension that exists in the initial state of the spring 414, the brushing knife 4 is stably installed on the connecting block 411, preventing the brushing knife 4 from shifting in the vertical direction, ensuring the brushing depth is stable, and avoiding affecting the brushing quality. At the same time, since the brushing knife 4 is installed on the connecting block 411 through the spring 414 and the rotating shaft 413, the complexity and volume of the connecting mechanism are reduced, thereby making it easier to install and replace the brushing knife 4 and to replace it after wear or damage.

[0060] In one embodiment of the present invention, a fixing frame 53 is installed on the mounting rod 3, a second rotating shaft 51 is installed on the fixing frame 53, a smoothing roller 5 is installed on the second rotating shaft 51, and the smoothing roller 5 is in contact with the surface of the laminated plate 8.

[0061] The lower end of the brushing knife 4 is beveled, and the beveled surface on the brushing knife 4 contacts the laminated plate 8 first. The brushing knife 4 contacts the laminated plate 8 first relative to the smoothing roller 5.

[0062] By beveling the lower end of the roughening knife 4, the beveled surface contacts the composite plate 8 first. During the roughening process, the beveled surface guides and presses down the sand and gravel aggregate encountered in the composite plate 8, reducing the possibility of the sand and gravel aggregate being scraped and scraped up by the roughening knife 4, ensuring the normal progress of subsequent processes and ensuring the surface quality of the composite plate 8 after roughening.

[0063] Meanwhile, after the roughening knife 4 roughens the surface of the laminated plate 8, the smoothing roller 5 located behind the roughening knife 4 will coat and smooth the surface of the laminated plate 8, further smoothing the surface of the laminated plate 8, avoiding the presence of sand and gravel aggregates turned up during the roughening process on the surface of the laminated plate 8, so that the surface quality and roughening effect of the laminated plate 8 are good.

[0064] In one embodiment of the present invention, the smoothing roller 5 is made of rubber material, the smoothing roller 5 has a deformation cavity 52, the rotating shaft 51 has a connecting cavity, the connecting cavity is connected to an external air source, and the deformation cavity 52 and the connecting cavity are interconnected.

[0065] The fixing bracket 53 does not contact the protruding strip 31 on the mounting rod 3;

[0066] By using rubber material to make the smoothing roller 5, the wear on the surface of the laminated plate 8 during the smoothing roller 5 is reduced, the service life of the smoothing roller 5 is extended, and the normal operation of the roughening device is ensured.

[0067] Meanwhile, the fixing frame 53 does not contact the protruding strip 31 on the mounting rod 3, allowing the mounting frame to rotate relative to the mounting rod 3. This makes it easy to adjust the height of the smoothing roller 5 to accommodate laminated plates 8 of different thicknesses, expanding the applicability of the roughening device. At the same time, since the smoothing roller 5 has a deformation cavity 52 inside, when the height of the smoothing roller 5 to be adjusted does not change much, the height adjustment requirements of the smoothing roller 5 can be met by adjusting the diameter of the smoothing roller 5, so that the smoothing roller 5 can fit against the surface of the laminated plate 8, ensuring the surface quality of the laminated plate 8, and reducing the difficulty and workload of adjusting the height of the smoothing roller 5.

[0068] Meanwhile, because the smoothing roller 5 has a deformation cavity 52 inside, the smoothing roller 5 has a relatively small mass, which makes it easier to adjust and install the smoothing roller 5, reducing the difficulty and workload of the workers.

[0069] Meanwhile, since the smoothing roller 5 is made of rubber, it is elastic. Therefore, when the smoothing roller 5 comes into contact with the edge of the mold table 7, the surface of the smoothing roller 5 will deform to adapt to the shape of the edge of the mold table 7, so that there will be no collision or forced squeezing between the two, thereby avoiding damage to both and affecting the normal operation of the roughening device.

[0070] In one embodiment of the present invention, after the roughening device completes the roughening process, it controls the compression bladder 42 to expand and contract periodically, so that the compression bladder 42 drives the roughening knife 4 to vibrate.

[0071] Since the roughening blade 4 is in contact with the concrete on the composite slab 8, some concrete will adhere to the surface of the roughening blade 4 after roughening is completed. At this time, the controller controls the external control mechanism to periodically deliver and discharge the expansion medium into the extrusion bladder 42, causing the extrusion bladder 42 to continuously expand and contract. During this process, the extrusion bladder 42 will drive the slip ring 41 and the roughening blade 4 to reciprocate, thereby causing the roughening blade 4 to vibrate and shake, so that the concrete adhering to the surface of the roughening blade 4 will detach, so as to facilitate the subsequent cleaning of the roughening device and avoid concrete adhesion corroding the roughening blade 4, thus extending the service life of the roughening blade 4.

[0072] In one embodiment of the present invention, the compression bladder 42 is a hydraulic bladder, the expansion medium is hydraulic oil, and a solenoid valve is installed at one end of the connecting pipe 33 near the mounting rod 3. When the hydraulic oil in the compression bladder 42 is discharged, the solenoid valve opens and closes rapidly.

[0073] By filling the compression bladder 42 with hydraulic oil, the compression bladder 42 is not easily compressed after it expands, thereby stabilizing the gap between the slip ring 41 and the brushing knife 4 and preventing the brushing knife 4 from swinging or shaking during operation, which would affect the brushing effect.

[0074] Meanwhile, as the hydraulic oil in the compression bladder 42 is discharged stably and rapidly, the rapid opening and closing of the solenoid valve will continuously cut off and restore the flow of hydraulic oil. During this process, the hydraulic oil in the hydraulic bladder and the pipeline between the hydraulic bladder and the solenoid valve will be impacted, i.e., water hammer phenomenon will be generated. In turn, the water hammer phenomenon will further cause the compression bladder 42 to oscillate, increase the vibration effect on the roughening knife 4, and cause the concrete attached to the roughening knife 4 to fall off or loosen, making it easier to clean the roughening knife 4 in the future.

[0075] The specific workflow is as follows:

[0076] During operation, the controller controls the electric push rod 2 to move, causing the lifting plate 21 to rise and the guide rod 22 to move upward, which in turn causes the mounting rod 3 and the brushing knife 4 to move upward, so that the lower end of the brushing knife 4 is above the edge of the mold table 7.

[0077] When the mold table 7 moves on the roughening device via the guide roller 12 and the edge of the mold table 7 has passed the roughening knife 4, the controller controls the mold table 7 to stop moving. At the same time, the controller controls the electric push rod 2 to move in the opposite direction, driving the lifting plate 21 to move downward, so that the mounting rod 3 and the roughening knife 4 descend until the lower end of the roughening knife 4 is inserted into the surface of the laminated plate 8 on the mold table 7. After that, the controller controls the mold table 7 to continue moving, so that the roughening knife 4 completes the roughening action on the surface of the laminated plate 8. At the same time, when the mold table 7 is about to completely pass under the roughening knife 4 and the roughening knife 4 has completed the roughening, the controller controls the roughening knife 4 to rise, waiting for the subsequent roughening treatment of the laminated plate 8.

[0078] Meanwhile, the raising and lowering of the mounting rod 3 and the scratching knife 4 by the electric push rod 2 makes it easy to adjust the depth of the scratches made by the scratching knife 4 on the surface of the composite plate 8.

[0079] Meanwhile, when it is necessary to perform surface roughening treatment on the laminated plate 8 with different thicknesses and surface roughness requirements, the controller controls the external control mechanism to send the expansion medium into the extrusion bladder 42, causing the extrusion bladder 42 to expand, thereby driving the slip ring 41 to move on the mounting rod 3, increasing or decreasing the distance between the slip rings 41, and adjusting the distance between the roughening knives 4.

[0080] Meanwhile, due to the magnetic attraction between the slip rings 41 and the bonding of the surfaces of the slip rings 41 and the compression bladder 42, there is a tendency for the gap between the buffing knives 4 to decrease.

[0081] Meanwhile, a rubber layer is installed on the surface of the texturing blade 4 to isolate the texturing blade 4 from the concrete;

[0082] Meanwhile, the matching between the protrusion 31 on the mounting rod 3 and the sliding groove on the slip ring 41 ensures that the brushing knife 4 always remains vertical.

[0083] When roughening the laminated plates 8 with different thicknesses and roughness requirements, the staff adjusts the position of the limit block 6 according to the size markings on the mounting rod 3, changing the range of adjustment distance. After the compression bladder 42 expands, the roughening blades 4 will be evenly distributed within the range of adjustment distance, and the spacing between each roughening blade 4 will be precise.

[0084] At the same time, the limiting block 6 contacts the slip ring 41 near both ends of the mounting rod 3 through the abutting rod 61, making the distance between the limiting block 6 and the slip ring 41 relatively large.

[0085] Through the cooperation of spring 414 and compression bladder 42, when the roughening knife 4 roughens the surface of the composite plate 8, when the roughening knife 4 encounters an obstacle, such as the steel bars or trusses in the composite plate 8, the obstacle will squeeze the roughening knife 4, causing the roughening knife 4 to be subjected to a lateral force. That is, under the action of spring 414, the roughening knife 4 will twist and deflect around the pivot 413 as the center line, so that the roughening knife 4 can pass over the obstacle. After that, the roughening knife will return to the initial position under the action of spring 414, completing the roughening work.

[0086] The two ends of the spring 414 are connected to the connecting block 411 and the brushing knife 4. With the tension that the spring 414 has in its initial state, the brushing knife 4 is stably installed on the connecting block 411. At the same time, since the brushing knife 4 is installed on the connecting block 411 through the spring 414 and the rotating shaft 413, the complexity and volume of the connecting mechanism are reduced, and the difficulty of installing and replacing the brushing knife 4 is reduced.

[0087] By beveling the lower end of the texturing knife 4, the beveled surface contacts the composite plate 8 first, thereby guiding and pressing down the sand and gravel aggregate encountered in the composite plate 8 during the texturing process, reducing the possibility of the sand and gravel aggregate being scraped and scraped up by the texturing knife 4.

[0088] Meanwhile, after the roughening knife 4 roughens the surface of the laminated board 8, the smoothing roller 5 located behind the roughening knife 4 will coat and smooth the surface of the laminated board 8.

[0089] By using rubber material to make the smoothing roller 5, the wear on the surface of the laminated plate 8 during scraping is reduced;

[0090] Meanwhile, the fixing frame 53 does not contact the protruding strip 31 on the mounting rod 3, so that the mounting frame can rotate relative to the mounting rod 3, which facilitates the adjustment of the height of the smoothing roller 5. At the same time, since the smoothing roller 5 has a deformation cavity 52 inside, when the height of the smoothing roller 5 to be adjusted does not change much, the height adjustment requirements of the smoothing roller 5 can be met by adjusting the diameter of the smoothing roller 5.

[0091] Meanwhile, because the smoothing roller 5 has a deformation cavity 52 inside, the smoothing roller 5 has a relatively small mass, which makes it easier to adjust and install the smoothing roller 5.

[0092] Meanwhile, since the smoothing roller 5 is made of rubber, it is elastic. Therefore, when the smoothing roller 5 comes into contact with the edge of the mold table 7, the surface of the smoothing roller 5 will deform to adapt to the shape of the edge of the mold table 7, so that there will be no collision or forced squeezing between the two.

[0093] After the roughening is completed, some concrete will be attached to the surface of the roughening knife 4. At this time, the controller controls the external control mechanism to periodically deliver and discharge the expansion medium into the extrusion bladder 42, causing the extrusion bladder 42 to continuously expand and shrink. During this process, the extrusion bladder 42 will drive the slip ring 41 and the roughening knife 4 to reciprocate, thereby causing the roughening knife 4 to oscillate and shake, causing the concrete attached to the surface of the roughening knife 4 to detach.

[0094] By filling the compression bladder 42 with hydraulic oil, the compression bladder 42 is not easily compressed after it expands, thereby stabilizing the gap between the slip ring 41 and the buffing knife 4.

[0095] Meanwhile, as the hydraulic oil in the compression bladder 42 is discharged stably and quickly, the rapid opening and closing of the solenoid valve will continuously cut off and restore the flow of hydraulic oil. During this process, the hydraulic oil in the hydraulic bladder and the pipeline between the hydraulic bladder and the solenoid valve will be impacted, that is, water hammer phenomenon will be generated. In turn, the water hammer phenomenon will further cause the compression bladder 42 to oscillate, increase the vibration effect on the roughening knife 4, and cause the concrete attached to the roughening knife 4 to fall off or loosen.

[0096] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A surface roughening device for a precast concrete composite floor slab production line, comprising a frame (1), wherein a guide roller (12) is installed on the frame (1), and the guide roller (12) moves a mold table (7) on which the composite slab (8) is placed; Its features are: An electric push rod (2) is installed on the frame (1), a lifting plate (21) is installed on the electric push rod (2), an mounting rod (3) is installed on the lifting plate (21) via a mounting seat (23), a brushing knife (4) is installed on the mounting rod (3), a fixed seat (11) is installed on the frame (1), a guide rod (22) is installed on the lifting plate (21), and the guide rod (22) is slidably installed on the fixed seat (11); Slip rings (41) and compression bladders (42) are alternately mounted on the mounting rod (3). The buffing knife (4) is installed at the lower end of the slip rings (41). There is a magnetic attraction between the slip rings (41). The sides of the slip rings (41) and the compression bladders (42) that are in contact with each other are bonded together. A flow guide cavity (32) is opened in the mounting rod (3). The flow guide cavity (32) is connected to an external control mechanism through a connecting pipe (33). The flow guide cavity (32) is interconnected with the compression bladders (42). The flow guide cavity (32) sends the expansion medium into or out of the compression bladders (42). The mounting rod (3) has a raised strip (31) on its surface, and the slip ring (41) has a groove that matches the raised strip (31). The surface of the burr cutter (4) is covered with a rubber layer.

2. The surface roughening device for a precast concrete composite floor slab production line according to claim 1, characterized in that: Limiting blocks (6) are symmetrically installed on the mounting rod (3). The buffing knife (4) is located between the two limiting blocks (6). The limiting blocks (6) are fixed on the mounting rod (3) by screws. Size markings are engraved on the surface of the mounting rod (3). The limiting block (6) has an abutment rod (61) installed on the side facing the buffing knife (4), and the abutment rod (61) is in contact with the end face of the slip ring (41).

3. The surface roughening device for a precast concrete composite floor slab production line according to claim 1, characterized in that: A connecting block (411) is installed on the slip ring (41), an mounting cylinder (412) is installed on the connecting block (411), and a rotating shaft (413) is installed on the brushing knife (4). The rotating shaft (413) is rotatably installed inside the mounting cylinder (412). A spring (414) is installed between the brushing knife (4) and the connecting block (411). The spring (414) is symmetrically installed on both sides of the rotating shaft (413) along the width direction of the brushing knife (4).

4. The surface roughening device for a precast concrete composite floor slab production line according to claim 3, characterized in that: The two ends of the spring (414) are connected to the connecting block (411) and the brushing knife (4) respectively by fixing pins (415). There is a gap between the connecting block (411) and the brushing knife (4), which serves as the space for the spring (414) to undergo torsional deformation. The spring (414) has a tendency to contract in its initial state.

5. The surface roughening device for a precast concrete composite floor slab production line according to claim 1, characterized in that: A fixing frame (53) is installed on the mounting rod (3), a rotating shaft (51) is installed on the fixing frame (53), a smoothing roller (5) is installed on the rotating shaft (51), and the smoothing roller (5) is in contact with the surface of the composite plate (8). The lower end of the brushing knife (4) is beveled, and the beveled surface of the brushing knife (4) contacts the laminated plate (8) first. The brushing knife (4) contacts the laminated plate (8) first relative to the smoothing roller (5).

6. The surface roughening device for a precast concrete composite floor slab production line according to claim 5, characterized in that: The smoothing roller (5) is made of rubber material. A deformation cavity (52) is provided inside the smoothing roller (5). A connecting cavity is provided inside the rotating shaft (51). The connecting cavity is connected to an external air source. The deformation cavity (52) and the connecting cavity are connected to each other. The fixing bracket (53) does not contact the protrusion (31) on the mounting rod (3).

7. The surface roughening device for a precast concrete composite floor slab production line according to claim 1, characterized in that: After the texturing device completes the texturing process, it controls the compression bladder (42) to periodically expand and contract, causing the compression bladder (42) to drive the texturing knife (4) to vibrate.

8. The surface roughening device for a precast concrete composite floor slab production line according to claim 7, characterized in that: The compression bladder (42) is a hydraulic bladder, the expansion medium is hydraulic oil, and a solenoid valve is installed at one end of the connecting pipe (33) near the mounting rod (3). When the hydraulic oil in the compression bladder (42) is discharged, the solenoid valve opens and closes rapidly.

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