Core mold fixing device for concrete hollow floor system

Abstract

The invention relates to the technical field of building construction, and discloses a concrete hollow floor mandrel fixing device which comprises a concrete reinforcement beam, a formwork fixedly connected to the outer wall of the concrete reinforcement beam, a lower plate rib fixedly connected to the outer wall of the concrete reinforcement beam, and an upper plate rib fixedly connected to the outer wall of the concrete reinforcement beam. After the fixing nut is screwed down, the two handles are pulled to move oppositely, the sliding rod is driven to move downwards, meanwhile, the pull rod is driven to move downwards, the fixing nut connected to the pull rod in a threaded mode is subjected to downward pulling force of the pull rod, the positioning strip is driven to apply downward force to the core mold, and the core mold is made to make close contact with a concrete protection layer; and the situation that in the concrete pouring process, flowing concrete generates upward buoyancy on the core mold, so that the core mold deviates, floats upwards and the like, a preset cavity structure in the floor system is damaged, and finally the pouring quality and subsequent structure performance of the concrete hollow floor system are affected is avoided.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a core mold fixing device for hollow concrete floor slabs. Background Technology

[0002] Hollow concrete floor slabs are a new type of horizontal load-bearing structure optimized from traditional solid concrete floor slabs. The core of this structure is to replace some of the concrete that does not participate in the main load-bearing by setting up cavities inside. This reduces the weight of the floor slab while ensuring or even optimizing the load-bearing performance. It can also accommodate pipeline laying and improve sound and heat insulation. The core mold is the core component that forms the internal cavity of the hollow concrete floor slab.

[0003] The core mold is placed inside the formwork before concrete pouring to create a cavity in the concrete. During pouring, the flowing concrete exerts an upward lifting force on the core mold, similar to the buoyancy of a liquid. When the core mold is made of lightweight materials such as plastic or foam, its density is much lower than that of concrete. This density difference further amplifies the upward buoyancy, causing the core mold to float. If the core mold is not firmly fixed, floating during the pouring process will weaken the overall load-bearing capacity of the floor slab and reduce the safety and stability of the structure. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a core mold fixing device for hollow concrete floor slabs, including a reinforced concrete beam, a template fixedly connected to the outer wall of the reinforced concrete beam, lower slab reinforcement fixedly connected to the outer wall of the reinforced concrete beam, upper slab reinforcement fixedly connected to the outer wall of the reinforced concrete beam, two concrete protective layers fixedly connected to the top of the lower slab reinforcement, a core mold fixedly connected to the top of the two concrete protective layers, and several positioning strips fixedly connected to the outer wall of the core mold, and further comprising: The clamping mechanism is fixedly connected to the bottom of the template and is used to clamp the core mold; The scaling mechanism is fixedly connected to the top of the clamping mechanism and is used for demolding after the casting is completed. The limiting mechanism is fixedly connected to the outer wall of the clamping mechanism and is used to lock the clamping mechanism. The process involves installing the bottom reinforcement bars after the formwork is installed, then installing the concrete protective layer on top of the bottom reinforcement bars, followed by installing the core mold and positioning strips, then installing the fixing device, and finally installing the top reinforcement bars.

[0005] Preferably, the clamping mechanism includes: The pressing component is fixedly connected to the bottom of the template by fasteners; The fasteners include the fixing shell at the bottom of the fixing connection template; The pull assembly is slidably connected to the outer wall of the fixed shell via a sliding component; The sliding component includes a slide rod that is slidably connected to the outer wall of the fixed housing; a pull rod is fixedly connected to the outer wall of the slide rod. The pressing component is used to drive the pulling component to slide on the fixed shell.

[0006] Preferably, the scaling mechanism includes: The sliding components are provided in several parts, and all of the sliding components are slidably connected to the top of the fixed shell; The connecting components are provided in several parts, and each of the connecting components is fixedly connected to the outer wall of the tie rod by a connecting rod; The connecting rod includes a fixing block that is fixedly connected to the outer wall of the tie rod; The sliding component is fixedly connected to the outer wall of the pull rod by three connecting components.

[0007] Preferably, the limiting mechanism includes: There are two adjustment components, both of which are fixedly connected to the outer wall of the slide rod via connectors. The connector includes a connecting block that is fixedly connected to the outer wall of the slide rod; There are two fixing components, both of which are located on the outer wall of the fixing shell. The system includes three adjustment components and three fixing components, arranged in a circular array. The adjustment components are adapted to the fixing components to achieve the function of limiting movement.

[0008] Preferably, the pressing assembly includes a plurality of limiting blocks fixedly connected to the outer wall of the fixed housing, and the outer wall of the plurality of limiting blocks is rotatably connected to two handles; The two limit blocks on the left are mirror images of the two limit blocks on the right.

[0009] Preferably, the pulling assembly includes two connecting rods 1 rotatably connected to the outer wall of the slide rod, and two connecting rods 2 rotatably connected to the outer wall of the slide rod. Both connecting rods 1 are rotatably connected to the handle located on the left side, and both connecting rods 2 are rotatably connected to the handle located on the right side. A fixing nut is threadedly connected to the side of the pull rod away from the slide rod. Among them, the two connecting rods one and the two connecting rods two are set in a mirror image.

[0010] Preferably, the sliding assembly includes an outer sliding plate slidably connected to the top of the fixed shell, a groove is provided on the outer wall of the outer sliding plate, an inner sliding plate is rotatably connected to the outer wall of the groove, a movable plate is slidably connected to the outer wall of the outer sliding plate, and a spring is fixedly connected to the outer wall of the outer sliding plate. The outer sliding plate is connected to the inner sliding plate in a counterclockwise direction. The inner sliding plate is adapted to the next sliding groove in the counterclockwise direction. The outer sliding plate has a protruding plate in the counterclockwise direction, which contacts the moving plate.

[0011] Preferably, the connecting assembly includes a connecting rod three rotatably connected to the outer wall of the fixed block one, a fixed block two fixedly connected to the outer wall of the outer slide plate, a connecting rod three rotatably connected to the fixed block two on the side away from the fixed block one, and a tension spring fixedly connected to the outer wall of the pull rod; The side of the tension spring furthest from the pull rod is fixedly connected to the outer sliding plate, and the tension spring is in a free state under normal conditions.

[0012] Preferably, the adjusting component includes two sliding plates slidably connected to the inner wall of the connecting block, with springs fixedly connected to the sides of the two sliding plates that are far apart from each other, and arc-shaped plates fixedly connected to the sides of the two sliding plates that are close to each other. Both springs are fixedly connected to the connecting block on the side away from the sliding plate, and the springs are in a free state under normal conditions.

[0013] Preferably, the fixing component includes a fixed trapezoidal block fixedly connected to the outer wall of the fixing shell, and a sliding trapezoidal block slidably connected to the outer wall of the fixing shell; In this case, the base edges of the fixed trapezoidal block and the sliding trapezoidal block are opposite to each other.

[0014] The present invention has the following beneficial effects: (1) After the fixed nut is tightened, the two handles are pulled to make them move towards each other. At this time, the angle between the connecting rod 1 and the connecting rod 2 connected to the handle becomes smaller, which drives the sliding rod to move downward and at the same time drives the pull rod to move downward. The fixed nut threaded on the pull rod is pulled downward by the pull rod, which drives the positioning strip to apply a downward force to the core mold, so that the core mold is in close contact with the concrete protective layer. Through the application of the above components, the upward floating force of the flowing concrete on the core mold during the concrete pouring process is avoided, which causes the core mold to shift position or float upward, destroying the pre-set cavity structure inside the floor slab and ultimately affecting the pouring quality and subsequent structural performance of the hollow concrete floor slab.

[0015] (2) This invention utilizes the characteristic of the sliding rod driving the pull rod downwards in the above-mentioned equipment. At this time, the pull rod moves downwards. Due to the combined action of the fixed shell and the fixed nut, the longitudinal position of the outer sliding plate remains unchanged. At this time, the angle between the connecting rod and the pull rod increases, the tension spring is stretched, and the distance between the outer sliding plate and the pull rod increases, causing the outer sliding plate to slide. This causes the inner sliding plate to disengage from the groove in the outer sliding plate, and the diameter of the cylinder formed by the three outer sliding plates increases. At this time, a first pour is performed. After the concrete poured in the first pour reaches the specified strength, the handle is pulled to make it move in the opposite direction, driving the pull rod upwards, thereby reducing the diameter of the cylinder formed by the three outer sliding plates, so that the outer wall of the outer sliding plate is separated from the concrete. The tension spring reduces the difficulty of separation, and the fixed nut is removed. Through the application of the above components, the problem of difficulty in disassembling the subsequent fixing device due to excessive friction between the outer sliding plate and the concrete is solved, avoiding damage to the concrete structure caused by forced disassembly, and ensuring the smoothness of construction and the integrity of the components. (3) The present invention utilizes the feature of the pull rod of the above-mentioned device to drive the outer sliding plate to slide. A protruding plate is provided on the outer wall of the outer sliding plate in the counterclockwise direction. The protruding plate contacts the moving plate. Through the spring, when the diameter of the cylinder decreases, the protruding plate presses the moving plate to move inward, driving the spring to compress, so that the inner sliding plate and the chute can smoothly close together and reduce the diameter of the cylinder. When the diameter of the cylinder increases, the spring releases the elastic force and drives the moving plate to move outward. At this time, the protruding plate and the moving plate cooperate with each other. Through the application of the above-mentioned components, the flowing concrete during the pouring process is blocked from entering the inside of the cylinder, avoiding the problem of concrete intruding into the fixed device and causing damage to the device.

[0016] (4) This invention utilizes the characteristic of the sliding rod moving up and down. When the sliding rod is at its highest point, the arc-shaped plate is located above the top of the fixed trapezoidal block. During the downward movement of the sliding rod, the arc-shaped side of the arc-shaped plate contacts the fixed trapezoidal block, causing the arc-shaped plate to compress the spring through the sliding plate, allowing the arc-shaped plate to pass over the bottom of the fixed trapezoidal block and enter the middle position between the fixed trapezoidal block and the sliding trapezoidal block. Under the buoyancy of the core mold, the non-arc section of the arc-shaped plate cannot pass over the bottom of the fixed trapezoidal block, thereby achieving the fixing effect. After one pouring is completed, pull the two handles. The sliding rod continues to move downwards as the curved plate passes the bottom of the sliding trapezoidal block. At this point, the two handles move in opposite directions, causing the curved plate to slide the sliding trapezoidal block upwards, bringing the bottom of the fixed trapezoidal block into contact with the bottom of the sliding trapezoidal block. As the sliding rod continues to move upwards, the curved plate passes the bottom of the fixed trapezoidal block, and the sliding trapezoidal block falls to the lowest point due to gravity. By applying the above components, the problems of floating and displacement that may occur due to the lack of continuous constraint of the core mold are solved, thus improving the quality stability and efficiency of a single pouring operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural diagram of the present invention; Figure 3 This is a partial cross-sectional view of the structure of the present invention; Figure 4 This is a schematic diagram of the overall structure of the clamping mechanism of the present invention; Figure 5 For the present invention Figure 4 A magnified structural diagram of A in the middle; Figure 6This is a partial structural diagram of the scaling mechanism of the present invention; Figure 7 For the present invention Figure 6 A magnified structural diagram of B in the diagram; Figure 8 This is a partial cross-sectional schematic diagram of the scaling mechanism of the present invention; Figure 9 For the present invention Figure 8 A magnified structural diagram of C; Figure 10 For the present invention Figure 8 A magnified structural diagram of D in the diagram; Figure 11 This is a schematic diagram of the overall structural motion of the present invention.

[0019] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Clamping mechanism; 11. Pressing assembly; 12. Pulling assembly; 13. Reinforced concrete beam; 14. Formwork; 15. Lower slab reinforcement; 16. Upper slab reinforcement; 17. Concrete protective layer; 18. Core mold; 19. Positioning strip; 111. Fixing shell; 112. Limiting block; 113. Handle; 121. Sliding rod; 122. Pull rod; 123. Connecting rod one; 124. Connecting rod two; 125. Fixing nut; 2. Scaling mechanism; 21. Sliding assembly Components; 22. Connecting assembly; 211. Outer sliding plate; 212. Slide groove; 213. Inner sliding plate; 214. Moving plate; 215. Spring; 221. Fixing block one; 222. Link three; 223. Fixing block two; 224. Tension spring; 3. Limiting mechanism; 31. Adjusting assembly; 32. Fixing assembly; 311. Connecting block; 312. Sliding plate; 313. Spring; 314. Arc plate; 321. Fixed trapezoidal block; 322. Sliding trapezoidal block. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1, please refer to Figures 1-8This invention relates to a core mold fixing device for a hollow concrete floor slab, comprising a reinforced concrete beam 13, a template 14 fixedly connected to the outer wall of the reinforced concrete beam 13, lower reinforcement bars 15 fixedly connected to the outer wall of the reinforced concrete beam 13, upper reinforcement bars 16 fixedly connected to the outer wall of the reinforced concrete beam 13, two concrete protective layers 17 fixedly connected to the top of the lower reinforcement bars 15, a core mold 18 fixedly connected to the top of the two concrete protective layers 17, and a plurality of positioning strips 19 fixedly connected to the outer wall of the core mold 18, and further comprising: The clamping mechanism 1 is fixedly connected to the bottom of the template 14 and is used to clamp the core mold 18. Scaling mechanism 2 is fixedly connected to the top of clamping mechanism 1 and is used for demolding after pouring; Limiting mechanism 3 is fixedly connected to the outer wall of pressing mechanism 1 and is used to lock pressing mechanism 1; Among them, after the template 14 is installed, the lower slab reinforcement 15 is installed, the concrete protective layer 17 is installed on the top of the lower slab reinforcement 15, the core mold 18 and positioning strip 19 are then installed, the fixing device is then installed, and finally the upper slab reinforcement 16 is installed. When in use, after the template 14 is installed, the lower slab reinforcement 15 is installed, the concrete protective layer 17 is installed on the top of the lower slab reinforcement 15, the core mold 18 and the positioning strip 19 are then installed, and the fixing device is then installed. The scaling mechanism 2 is passed through the hole on the core mold 18 and tightened with the fixing nut 125.

[0022] The clamping mechanism 1 includes: Pressing component 11 is fixedly connected to the bottom of template 14 by fasteners; The fasteners include the fixing shell 111 at the bottom of the fixing connection template 14; Pull component 12 is slidably connected to the outer wall of fixed shell 111 via a slider; The sliding component includes a slide rod 121 slidably connected to the outer wall of the fixed housing 111; a pull rod 122 is fixedly connected to the outer wall of the slide rod 121. The pressing component 11 is used to drive the pulling component 12 to slide on the fixed shell 111.

[0023] Scaling mechanism 2 includes: Sliding component 21, several sliding components 21 are provided, and several sliding components 21 are slidably connected to the top of the fixed shell 111; A number of connecting components 22 are provided, and all of the connecting components 22 are fixedly connected to the outer wall of the tie rod 122 by connecting rods; The connecting rod includes a fixing block 221 that is fixedly connected to the outer wall of the tie rod 122; The sliding component 21 is fixedly connected to the outer wall of the pull rod 122 by three connecting components 22.

[0024] Limiting mechanism 3 includes: There are two adjustment components 31, and both adjustment components 31 are fixedly connected to the outer wall of the slide rod 121 by connectors. The connector includes a connecting block 311 that is fixedly connected to the outer wall of the slide rod 121; There are two fixing components 32, and both fixing components 32 are disposed on the outer wall of the fixing shell 111. There are three adjusting components 31 and three fixing components 32. The three adjusting components 31 and fixing components 32 are arranged in a circular array. The adjusting components 31 and fixing components 32 are adapted to each other to achieve the function of limiting.

[0025] Example 2, please refer to Figures 4-11 This invention is a core mold fixing device for hollow concrete floor slabs, based on Example 1. The pressing assembly 11 includes a plurality of limiting blocks 112 fixedly connected to the outer wall of the fixed housing 111, and two handles 113 are rotatably connected to the outer wall of the plurality of limiting blocks 112. The two limit blocks 112 on the left are mirror images of the two limit blocks 112 on the right.

[0026] The pulling assembly 12 includes two connecting rods 123 rotatably connected to the outer wall of the slide rod 121, and two connecting rods 124 rotatably connected to the outer wall of the slide rod 121. Both connecting rods 123 are rotatably connected to the handle 113 located on the left side, and both connecting rods 124 are rotatably connected to the handle 113 located on the right side. A fixing nut 125 is threadedly connected to the side of the pull rod 122 away from the slide rod 121. Among them, the two connecting rods 123 and the two connecting rods 124 are arranged in a mirror image; After the fixing nut 125 is tightened, pull the two handles 113 to make them move towards each other. At this time, the included angle between the connecting rod 123 and the connecting rod 124 connected to the handle 113 becomes smaller, causing the sliding rod 121 to move downward. At the same time, the pull rod 122 is pulled downward. The fixing nut 125 threadedly connected to the pull rod 122 is pulled downward by the pull rod 122, which causes the positioning strip 19 to apply a downward force to the core mold 18, so that the core mold 18 is in close contact with the concrete protective layer 17. This prevents the core mold 18 from changing position due to buoyancy during pouring, which would affect the pouring performance.

[0027] The sliding assembly 21 includes an outer sliding plate 211 slidably connected to the top of the fixed shell 111, a groove 212 is provided on the outer wall of the outer sliding plate 211, an inner sliding plate 213 is rotatably connected to the outer wall of the groove 212, a movable plate 214 is slidably connected to the outer wall of the outer sliding plate 211, and a spring piece 215 is fixedly connected to the outer wall of the outer sliding plate 211. Among them, the outer sliding plate 211 is rotatably connected to the inner sliding plate 213 in the counterclockwise direction. The inner sliding plate 213 is adapted to the next sliding groove 212 in the counterclockwise direction. The outer sliding plate 211 is provided with a protruding plate in the counterclockwise direction, which is in contact with the moving plate 214. A protruding plate is provided on the outer wall of the outer sliding plate 211 in a counterclockwise direction. The protruding plate contacts the movable plate 214. Through the spring piece 215, when the diameter of the cylinder decreases, the protruding plate presses the movable plate 214 to move inward, causing the spring piece 215 to compress, so that the inner sliding plate 213 and the slide groove 212 can smoothly close together, reducing the diameter of the cylinder. When the diameter of the cylinder increases, the spring piece 215 releases its elastic force, causing the movable plate 214 to move outward. At this time, the protruding plate and the movable plate 214 cooperate with each other to prevent concrete from entering the inside of the cylinder, thus preventing the device from failing due to concrete entering the fixed device.

[0028] The connecting assembly 22 includes a connecting rod 3 222 rotatably connected to the outer wall of the fixed block 1 221, a fixed block 223 fixedly connected to the outer wall of the outer slide plate 211, the side of the connecting rod 3 222 away from the fixed block 1 221 being rotatably connected to the fixed block 223, and a tension spring 224 fixedly connected to the outer wall of the pull rod 122. Among them, the side of the tension spring 224 away from the pull rod 122 is fixedly connected to the outer slide plate 211, and the tension spring 224 is in a free state under normal conditions; A protruding plate is provided on the outer wall of the outer sliding plate 211 in a counterclockwise direction. The protruding plate contacts the movable plate 214. Through the spring piece 215, when the diameter of the cylinder decreases, the protruding plate presses the movable plate 214 to move inward, causing the spring piece 215 to compress, so that the inner sliding plate 213 and the slide groove 212 can smoothly close together, reducing the diameter of the cylinder. When the diameter of the cylinder increases, the spring piece 215 releases its elastic force, causing the movable plate 214 to move outward. At this time, the protruding plate and the movable plate 214 cooperate with each other to prevent concrete from entering the inside of the cylinder, thus preventing the device from failing due to concrete entering the fixed device.

[0029] The adjustment assembly 31 includes two sliding plates 312 that are slidably connected to the inner wall of the connecting block 311. A spring 313 is fixedly connected to the side of the two sliding plates 312 that are far apart from each other, and an arc plate 314 is fixedly connected to the side of the two sliding plates 312 that are close to each other. Both springs are fixedly connected to the connecting block 311 on the side away from the sliding plate 312, and spring 313 is in a free state under normal conditions.

[0030] The fixing component 32 includes a fixed trapezoidal block 321 fixedly connected to the outer wall of the fixing shell 111, and a sliding trapezoidal block 322 slidably connected to the outer wall of the fixing shell 111. Among them, the base edges of the fixed trapezoidal block 321 and the sliding trapezoidal block 322 are opposite to each other; When the sliding rod 121 is at its highest point, the arc-shaped plate 314 is positioned above the upper bottom of the fixed trapezoidal block 321. As the sliding rod 121 moves downward, the arc-shaped side of the arc-shaped plate 314 contacts the fixed trapezoidal block 321, causing the arc-shaped plate 314 to compress the spring 313 via the sliding plate 312. This allows the arc-shaped plate 314 to pass over the lower bottom of the fixed trapezoidal block 321 and enter the position between the fixed trapezoidal block 321 and the sliding trapezoidal block 322. Due to the buoyancy of the core mold 18, the non-arc section of the arc-shaped plate 314 cannot pass over the lower bottom of the fixed trapezoidal block 321, thus achieving a fixing effect. This is achieved in one pouring. Then, pull the two handles 113 to move them toward each other, so that the slide rod 121 continues to move downwards. The arc plate 314 passes over the bottom of the sliding trapezoidal block 322. At this time, move the two handles 113 toward each other, so that the arc plate 314 drives the sliding trapezoidal block 322 to slide upwards, so that the fixed trapezoidal block 321 contacts the bottom of the sliding trapezoidal block 322. As the slide rod 121 continues to move upwards, the arc plate 314 passes over the bottom of the fixed trapezoidal block 321, and the sliding trapezoidal block 322 falls to the lowest point due to gravity. This solves the problem that the fixing device cannot continuously press down the core mold 18 during a single pour.

[0031] A specific application of this embodiment is as follows: When in use, after the template 14 is installed, the lower slab reinforcement 15 is installed, the concrete protective layer 17 is installed on the top of the lower slab reinforcement 15, the core mold 18 and the positioning strip 19 are then installed, and the fixing device is then installed. The scaling mechanism 2 is passed through the hole on the core mold 18 and tightened with the fixing nut 125. After the fixing nut 125 is tightened, pull the two handles 113 to make them move towards each other. At this time, the included angle between the connecting rod 123 and the connecting rod 124 connected to the handle 113 becomes smaller, which drives the sliding rod 121 to move downward and at the same time drives the pull rod 122 to move downward. The fixing nut 125 threadedly connected to the pull rod 122 is pulled downward by the pull rod 122, which drives the positioning strip 19 to apply a downward force to the core mold 18, so that the core mold 18 is in close contact with the concrete protective layer 17, preventing the core mold 18 from changing position due to buoyancy during pouring, thus affecting the pouring performance.

[0032] Utilizing the characteristic of the aforementioned device that the sliding rod 121 drives the pull rod 122 to move downwards, the pull rod 122 moves downwards. Due to the combined action of the fixed shell 111 and the fixed nut 125, the longitudinal position of the outer sliding plate 211 remains unchanged. At this time, the angle between the connecting rod 222 and the pull rod 122 increases, and the tension spring 224 is stretched, increasing the distance between the outer sliding plate 211 and the pull rod 122, causing the outer sliding plate 211 to slide. This causes the inner sliding plate 213 to disengage from the groove 212 in the outer sliding plate 211. The diameter of the cylinder formed by the three outer sliding plates 211 increases. At this time, a pour is made. After the concrete reaches the specified strength, the handle 113 is pulled to move it in the opposite direction, which drives the pull rod 122 to move upward, thereby reducing the diameter of the cylinder formed by the three outer sliding plates 211. This allows the outer wall of the outer sliding plate 211 to separate from the concrete. The tension spring 224 reduces the difficulty of separation. The fixing nut 125 is removed, and the entire fixing device is taken out. At this time, the problem of the fixing device being difficult to remove due to excessive friction between the outer sliding plate 211 and the concrete is solved. Taking advantage of the characteristic of the pull rod 122 of the above-mentioned device to drive the outer slide plate 211 to slide, a protruding plate is provided on the outer wall of the outer slide plate 211 in the counterclockwise direction. The protruding plate contacts the moving plate 214. Through the spring piece 215, when the diameter of the cylinder decreases, the protruding plate presses the moving plate 214 to move inward, driving the spring piece 215 to compress, so that the inner slide plate 213 and the slide groove 212 can smoothly close together and reduce the diameter of the cylinder. When the diameter of the cylinder increases, the spring piece 215 releases the elastic force, driving the moving plate 214 to move outward. At this time, the protruding plate and the moving plate 214 cooperate with each other to prevent concrete from entering the inside of the cylinder and prevent the device from failing due to concrete entering the fixed device. Utilizing the characteristic of the sliding rod 121 moving up and down, when the sliding rod 121 is at its highest point, the arc-shaped plate 314 is positioned above the upper bottom of the fixed trapezoidal block 321. As the sliding rod 121 moves downwards, the arc-shaped side of the arc-shaped plate 314 contacts the fixed trapezoidal block 321, causing the arc-shaped plate 314 to compress the spring 313 via the sliding plate 312. This allows the arc-shaped plate 314 to pass over the lower bottom of the fixed trapezoidal block 321 and enter the position between the fixed trapezoidal block 321 and the sliding trapezoidal block 322. Subjected to the buoyancy of the core mold 18, the non-arc section of the arc-shaped plate 314 cannot pass over the lower bottom of the fixed trapezoidal block 321, thus achieving a fixed position. As a result, after one pour is completed, the two handles 113 are pulled to move towards each other, causing the slide rod 121 to continue to move downward. The arc plate 314 passes over the bottom of the sliding trapezoidal block 322. At this time, the two handles 113 are moved towards each other, and the arc plate 314 drives the sliding trapezoidal block 322 to slide upward, so that the fixed trapezoidal block 321 contacts the bottom of the sliding trapezoidal block 322. As the slide rod 121 continues to move upward, the arc plate 314 passes over the bottom of the fixed trapezoidal block 321, and the sliding trapezoidal block 322 falls to the lowest point due to gravity. This solves the problem that the fixing device cannot continuously press down the core mold 18 during one pour. After the first pour reaches a certain strength, the entire fixing device is removed, the contact surface is cleaned, the leaks are sealed, and the second pour begins.

[0033] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A core mold fixing device for a hollow concrete floor slab, comprising a reinforced concrete beam (13), a template (14) fixedly connected to the outer wall of the reinforced concrete beam (13), a lower slab reinforcement (15) fixedly connected to the outer wall of the reinforced concrete beam (13), an upper slab reinforcement (16) fixedly connected to the outer wall of the reinforced concrete beam (13), two concrete protective layers (17) fixedly connected to the top of the lower slab reinforcement (15), a core mold (18) fixedly connected to the top of the two concrete protective layers (17), and a plurality of positioning strips (19) fixedly connected to the outer wall of the core mold (18). Its features are, Also includes: A clamping mechanism (1) is fixedly connected to the bottom of the template (14) and is used to clamp the core mold (18). Scaling mechanism (2), which is fixedly connected to the top of clamping mechanism (1) and is used for demolding after casting; Limiting mechanism (3), which is fixedly connected to the outer wall of pressing mechanism (1) and is used to lock pressing mechanism (1). After the template (14) is installed, the lower reinforcement (15) is installed, the concrete protective layer (17) is installed on the top of the lower reinforcement (15), the core mold (18) and positioning strip (19) are then installed, the fixing device is then installed, and finally the upper reinforcement (16) is installed.

2. The core mold fixing device for a hollow concrete floor slab according to claim 1, characterized in that: The clamping mechanism (1) includes: The pressing component (11) is fixedly connected to the bottom of the template (14) by a fastener; The fastener includes a fixing shell (111) at the bottom of the fixing connection template (14). A pull assembly (12) is slidably connected to the outer wall of the fixed shell (111) via a sliding member; The sliding component includes a slide rod (121) slidably connected to the outer wall of the fixed housing (111); a pull rod (122) is fixedly connected to the outer wall of the slide rod (121). The pressing component (11) is used to drive the pulling component (12) to slide on the fixed shell (111).

3. The core mold fixing device for a hollow concrete floor slab according to claim 2, characterized in that: The scaling mechanism (2) includes: A sliding component (21) is provided, and a plurality of sliding components (21) are slidably connected to the top of the fixed shell (111); A connecting component (22) is provided, and a plurality of the connecting components (22) are fixedly connected to the outer wall of the tie rod (122) by connecting rods; The connecting rod includes a fixing block (221) that is fixedly connected to the outer wall of the tie rod (122); The sliding component (21) is fixedly connected to the outer wall of the pull rod (122) by three connecting components (22).

4. The core mold fixing device for a hollow concrete floor slab according to claim 2, characterized in that: The limiting mechanism (3) includes: Adjustment component (31), two adjustment components (31) are provided, and both adjustment components (31) are fixedly connected to the outer wall of slide rod (121) by connectors; The connector includes a connecting block (311) that is fixedly connected to the outer wall of the slide rod (121). Two fixing components (32) are provided, and both fixing components (32) are provided on the outer wall of the fixing shell (111); Among them, there are three adjustment components (31) and three fixing components (32). The three adjustment components (31) and the fixing components (32) are arranged in a circular array. The adjustment components (31) and the fixing components (32) are adapted to each other to achieve the function of limiting.

5. A core mold fixing device for hollow concrete floor slabs according to claim 2, characterized in that: The pressing assembly (11) includes a plurality of limiting blocks (112) fixedly connected to the outer wall of the fixed shell (111), and two handles (113) are rotatably connected to the outer wall of the plurality of limiting blocks (112). Among them, the two limit blocks (112) on the left side are mirror images of the two limit blocks (112) on the right side.

6. The core mold fixing device for a hollow concrete floor slab according to claim 5, characterized in that: The pulling assembly (12) includes two connecting rods (123) rotatably connected to the outer wall of the slide rod (121), and two connecting rods (124) rotatably connected to the outer wall of the slide rod (121). Both connecting rods (123) are rotatably connected to the handle (113) on the left side, and both connecting rods (124) are rotatably connected to the handle (113) on the right side. A fixing nut (125) is threaded onto the side of the pull rod (122) away from the slide rod (121). Among them, the two connecting rods one (123) and the two connecting rods two (124) are set in a mirror image.

7. A core mold fixing device for hollow concrete floor slabs according to claim 3, characterized in that: The sliding assembly (21) includes an outer sliding plate (211) slidably connected to the top of the fixed shell (111), a groove (212) is provided on the outer wall of the outer sliding plate (211), an inner sliding plate (213) is rotatably connected to the outer wall of the groove (212), a movable plate (214) is slidably connected to the outer wall of the outer sliding plate (211), and a spring piece (215) is fixedly connected to the outer wall of the outer sliding plate (211). The outer slide plate (211) is rotatably connected to the inner slide plate (213) in the counterclockwise direction. The inner slide plate (213) is adapted to the next slide groove (212) in the counterclockwise direction. The outer slide plate (211) is provided with a protruding plate in the counterclockwise direction, which is in contact with the moving plate (214).

8. A core mold fixing device for hollow concrete floor slabs according to claim 7, characterized in that: The connecting assembly (22) includes a connecting rod three (222) rotatably connected to the outer wall of the fixed block one (221), a fixed block two (223) fixedly connected to the outer wall of the outer slide plate (211), the side of the connecting rod three (222) away from the fixed block one (221) rotatably connected to the fixed block two (223), and a tension spring (224) fixedly connected to the outer wall of the pull rod (122). Among them, the side of the tension spring (224) away from the pull rod (122) is fixedly connected to the outer slide plate (211), and the tension spring (224) is in a free state under normal conditions.

9. A core mold fixing device for hollow concrete floor slabs according to claim 4, characterized in that: The adjustment assembly (31) includes two sliding plates (312) slidably connected to the inner wall of the connecting block (311). A spring (313) is fixedly connected to the side of the two sliding plates (312) that are far apart from each other, and an arc plate (314) is fixedly connected to the side of the two sliding plates (312) that are close to each other. Among them, the side of each of the two springs away from the sliding plate (312) is fixedly connected to the connecting block (311), and the spring (313) is in a free state under normal conditions.

10. A core mold fixing device for hollow concrete floor slabs according to claim 9, characterized in that: The fixing component (32) includes a fixed trapezoidal block (321) fixedly connected to the outer wall of the fixing shell (111), and a sliding trapezoidal block (322) is slidably connected to the outer wall of the fixing shell (111). Among them, the bottom edges of the fixed trapezoidal block (321) and the sliding trapezoidal block (322) are opposite to each other.

Images