Device for separating high-grade concrete and low-grade concrete at beam-column joint

Abstract

The utility model relates to the technical field of concrete pouring construction, in particular to a high-low grade concrete separating device at a beam-column joint, which comprises a slotted hollow support, a flat iron hollow groove and a fan-shaped device, a plurality of through mounting holes are arranged on the slotted hollow support at intervals, and a vertical steel bar supporting leg is arranged in each mounting hole. A flat iron hollow groove is formed below the slotted hollow support, and a fan-shaped device is arranged on the inner side of the flat iron hollow groove. The fan-shaped device comprises fan ribs and triangular flexible materials, and the center of the bottom of the flat iron hollow groove is connected with a thin filament rod; the device is simple in structure and convenient to use, the purpose of separating high-grade concrete and low-grade concrete is achieved by arranging the fan-shaped device, all manufacturing materials are common materials on a construction site, the cost is low, the device can be recycled and installed before pouring, after pouring is completed, the device can be taken out in time and transferred to a next joint to be used, and the construction efficiency is improved. The problems that a dense-mesh steel wire mesh is difficult to bind, low in speed and cannot be taken out after being installed are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete pouring construction, in particular to a high- and low-grade concrete separation device at a beam-column node. Background Art

[0002] In cast-in-place concrete frame structures, to mitigate the effects of earthquakes, the structural design principles of "strong columns and weak beams," "strong shear and weak bending," and "strong joints and weak components" are employed. Because joints not only connect components but also transmit force between them, a joint failure implies failure of the connected columns and beams. As building height increases, the disparity in concrete strength between columns and beams widens. Furthermore, these disparate joint concrete strengths often create significant construction inconveniences. If not addressed properly, they can reduce joint concrete strength, impacting the structural load.

[0003] Currently, when the concrete strength grades of beam and column components differ by more than two grades, separation is often achieved by tying dense mesh wire mesh at a certain distance from the column or shear wall. Some construction projects use fixed airbags for separation. However, due to the crisscrossing of the main reinforcement and stirrups within the beam reinforcement skeleton, the limited operating space makes tying the dense mesh wire mesh difficult and slow. Furthermore, it must be tied and fixed before the beam side formwork is closed. Tying the dense mesh wire mesh consumes a lot of labor and seriously delays the overall progress of on-site construction. Furthermore, the dense mesh wire mesh cannot be removed after the concrete is poured, posing a visual quality risk. Although airbags can also be used for separation, they are not convenient due to the high procurement cost and the long inflation and deflation cycles. Utility Model Content

[0004] The utility model provides a high- and low-grade concrete separation device at beam-column joints, which overcomes the shortcomings of the above-mentioned existing technologies and can effectively solve the problems of difficult and slow binding of dense mesh steel wire mesh when the existing beam-column joints are separated by dense mesh steel wire mesh.

[0005] To solve the above problems, the utility model discloses a high- and low-grade concrete separation device at a beam-column joint, comprising a slotted hollow bracket, a flat iron hollow slot, and a fan-shaped device. The slotted hollow bracket is provided with a plurality of through-going mounting holes at intervals, each mounting hole is provided with a vertical steel bar support leg, a flat iron hollow slot is provided below the slotted hollow bracket, and a fan-shaped device is provided inside the flat iron hollow slot.

[0006] The fan-shaped device includes fan ribs and triangular flexible material. A thin wire rod is connected to the center of the bottom of the flat iron hollow groove. Multiple fan ribs of different lengths are inserted into the outside of the thin wire rod from front to back, and each adjacent fan rib is connected by a triangular flexible material. Short strip baffles with an opening width smaller than the width of the flat iron hollow groove are welded to the ends of the fan ribs on the front and the rear. A steel spoke is hinged on each short strip baffle, and a control rod is hinged on the upper end of each steel spoke. Two guide rings are provided on opposite sides of the flat iron hollow groove at an upper and lower interval. The upper end of the control rod passes through the two guide rings at corresponding positions from bottom to top and is located above the flat iron hollow groove. A fixed shaft is fixed to the center of the upper part of the flat iron hollow groove, and the upper end of the fan rib in the middle is fixedly connected to the fixed shaft.

[0007] The inner side of the slot of the slotted hollow bracket is slidably connected with a movable fixing bracket, and one end of the movable fixing bracket far away from the slotted hollow bracket is connected with the fixed shaft.

[0008] The above also includes a fixing mouth, and each vertical steel bar support leg and the slotted hollow bracket are connected with a fixing mouth, and the diameter of the fixing mouth is smaller than the opening width of the slotted hollow bracket.

[0009] The above also includes a steel wire, and the upper end of the fan rib located in the middle is fixedly connected to the fixed shaft through the steel wire.

[0010] The above also includes a soft steel wire, and the fixed shaft and the movable fixing frame are connected together through the soft steel wire.

[0011] The height of the guide ring located at the lower position in the hollow groove of the flat iron is greater than the sum of the lengths of the outermost fan rib and the steel spokes connected thereto.

[0012] The utility model has a simple structure and is easy to use. It achieves the purpose of separating high and low grade concrete by setting a fan-shaped device. All its manufacturing materials are common materials on the construction site, with low cost and can be used in turn. It can be installed before pouring and can be taken out in time after pouring is completed and used at the next node, solving the problems of difficult and slow binding of dense mesh wire mesh and inability to be removed after installation. In addition, compared with the existing high and low grade concrete separation device using air bags, the utility model is simple to operate and low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the main structure of the fan-shaped device in the embodiment of the present invention when it is not unfolded.

[0015] Figure 2 This is a schematic diagram of the main structure of the fan-shaped device when it is unfolded in the embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the fan-shaped device in the embodiment of the present invention when it is not unfolded.

[0017] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle.

[0018] Figure 5 It is a side view of the fan-shaped device in the embodiment of the present invention when it is unfolded.

[0019] Figure 6 for Figure 5 Enlarged structural diagram at point B in the middle.

[0020] In the figure: 1- slotted hollow bracket, 2- flat iron hollow slot, 3- vertical steel bar support leg, 4- fan rib, 5- triangular flexible material, 6- short baffle, 7- steel spoke, 8- control rod, 9- guide ring, 10- fixed shaft, 11- movable fixing frame, 12- fixed mouth, 13- soft steel wire. DETAILED DESCRIPTION

[0021] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0022] The present invention will be further described below in conjunction with the embodiments and accompanying drawings:

[0023] like Figure 1-6 As shown, a high- and low-grade concrete separation device at a beam-column node includes a slotted hollow bracket 1, a flat iron hollow groove 2, and a fan-shaped device. The slotted hollow bracket 1 is provided with a plurality of through-going mounting holes at intervals, each mounting hole is provided with a vertical steel bar support leg 3, a flat iron hollow groove 2 is provided below the slotted hollow bracket 1, and a fan-shaped device is provided inside the flat iron hollow groove 2;

[0024] The fan-shaped device includes a fan rib 4 and a triangular flexible material 5. A thin wire rod is connected to the center of the bottom of the flat iron hollow groove 2. A plurality of fan ribs 4 of different lengths are inserted into the outside of the thin wire rod from front to back in sequence, and each adjacent fan rib 4 is connected by a triangular flexible material 5; the ends of the fan rib 4 located at the front side and the fan rib 4 at the rear side are welded with a short baffle 6 with an opening width smaller than the width of the flat iron hollow groove 2, each short baffle 6 is hinged with a steel spoke 7, and the upper end of each steel spoke 7 is hinged with a control rod 8. Two guide rings 9 spaced apart from each other are provided on the opposite sides of the flat iron hollow groove 2. The upper end of the control rod 8 passes through the two guide rings 9 at the corresponding positions in sequence from bottom to top and is located above the flat iron hollow groove 2; a fixed shaft 10 is fixed to the center of the upper part of the flat iron hollow groove 2, and the upper end of the fan rib 4 located in the middle is fixedly connected to the fixed shaft 10;

[0025] A movable fixing frame 11 is slidably connected to the inner side of the slot of the slotted hollow bracket 1 , and one end of the movable fixing frame 11 away from the slotted hollow bracket 1 is connected to the fixed shaft 10 .

[0026] Among them, the slotted hollow bracket 1 can adjust the height of the vertical steel bar support leg 3 outside the vertical steel bar support leg 3, and the slotted hollow bracket 1 is vertically arranged between the vertical steel bar support leg 3. When working, the vertical steel bar support leg 3 is inserted into the gap between the main bars of the beam, and the intersection of the support leg and the beam steel bar skeleton is supported by the stirrups and tied and fixed, which plays the role of fixing the slotted hollow bracket 1, and the vertical steel bar support leg 3 serves as a bracket for the fan ribs 4 and the triangular flexible material 5 to separate the concrete when the fan-shaped device is deformed; the flat iron hollow groove 2 can be formed by fixing two flat irons of the same size using two sets of bolts; a circular hole is provided on one side of the end of the bottom of each fan rib 4, and each fan rib 4 is sequentially inserted into the thin wire rod at the bottom of the flat iron hollow groove 2 along the beam height direction according to the beam cross-section. The length and arrangement of the fan ribs 4 need to be adapted to the width and height of the beam steel bar skeleton. The fan ribs 4 are connected with triangular flexible materials 5. The function of the triangular flexible material 5 is to separate high and low grade concrete and pull the adjacent fan ribs 4 to rotate.

[0027] As needed, the height of the guide ring 9 located at the lower position in the flat iron hollow groove 2 is greater than the sum of the lengths of the outermost fan rib 4 and the steel spoke 7 connected to it; and the guide ring 9 located at the upper position and the guide ring 9 at the lower position are in the same vertical position and staggered at an appropriate distance.

[0028] Among them, the function of the short baffle 6 is to push the other fan bones 4 to rotate when the fan-shaped device is folded. The short baffle 6 is hingedly connected to the steel spoke 7 of appropriate length; two identical guide rings 9 are set at the opposite positions of the two flat irons inside the flat iron hollow groove 2, and the control rod 8 is movably passed through the guide ring 9 to control the opening and closing of the fan bone 4. The two guide rings 9 limit the movable track of the control rod 8 to ensure that the control rod 8 can only move up and down; the length of the control rod 8 should ensure that the upper end of the control rod 8 is slightly higher than the flat iron hollow groove 2 when the fan-shaped device is unfolded.

[0029] As needed, a steel wire is further included, and the upper end of the middle fan rib 4 is fixedly connected to the fixed shaft 10 by the steel wire. Thus, the middle fan rib 4 is fixed to the fixed shaft 10 using the steel wire to prevent the fan-shaped device from rotating.

[0030] Among them, one end of the movable fixing frame 11 can be inserted into the slotted hollow bracket 1, and is fixed to the slotted hollow bracket 1 by the weight of the flat iron hollow slot 2, and can move left and right in the slotted hollow bracket 1 to adapt to different working conditions.

[0031] Among them, the foldable and expandable fan-shaped device fixed on the flat iron hollow groove 2 has the function of passing through the gap between the main reinforcement of the beam in a folded state and tilting at an appropriate angle before pouring concrete, so that the entire fan-shaped device can be inserted into the interior of the steel frame; the length of the flat iron hollow groove 2 should be slightly longer than the longest fan bone 4.

[0032] During use, after the entire fan-shaped device is inserted into the steel frame and the expansion direction of the fan-shaped device is adjusted to be consistent with the direction of the beam stirrups, the two control rods are pushed downward to expand the two side fan bones 4, and then the remaining fan bones 4 connected by the triangular flexible material 5 are expanded until the entire fan-shaped device is fully opened. The vertical steel support legs 3 are inserted according to the distribution of the longitudinal reinforcement of the beam and fixed to the slotted hollow bracket 1 and the upper part of the beam stirrups to support the fan-shaped device and achieve the purpose of separating high and low grade concrete; when the low grade concrete is poured, the fan-shaped device needs to be taken out and folded, and the two side fan bones 4 are pulled upward by pulling the control rod 8 to rotate and fold, and rotate to the upper fan bone 4, and the short strip baffles 6 welded at the ends of the two outermost fan bones 4 are used to push the remaining fan bones 4 to rotate and fold until the entire outermost fan bone 4 is received in the flat iron hollow groove 2, thereby realizing the foldable function of the fan-shaped device. After the fan-shaped device is folded, it is rotated and taken out from the gap between the longitudinal reinforcement of the beam.

[0033] Among them, the length of the fan rib 4 is determined according to the size of the beam section. The outermost fan rib 4 is half the width of the bottom edge of the beam section, the middle fan rib 4 is consistent with the beam height, and the length of the remaining fan ribs 4 is the same as the distance from the fifth-dividing point in the beam height direction to the midpoint of the bottom edge of the beam section.

[0034] Among them, the steel spokes 7 and the control rod 8, as well as the steel spokes 7 and the short baffles 6 are all hinged, and should meet the rigidity requirements and not bend under the axial force generated by unfolding and folding.

[0035] like Figure 1-6 As shown, it also includes a fixing nozzle 12. Each vertical steel bar leg 3 is provided with a fixing nozzle 12 at the connection between the slotted hollow bracket 1. The diameter of the fixing nozzle 12 is smaller than the opening width of the slotted hollow bracket 1. Therefore, the leg can be removed or fixed by rotating the fixing nozzle 12, meeting the requirements of different working conditions.

[0036] like Figure 1-6 As shown, the flexible steel wire 13 is also included, connecting the fixed shaft 10 and the movable fixing frame 11 together. Thus, the flexible steel wire 13 suspends the flat iron hollow slot 2, preventing the fan-shaped device from falling into the steel frame and being unable to be removed. The flexible steel wire 13 also controls the fan-shaped device to unfold in a controllable direction to the sides through the fixed shaft 10, and the fan-shaped device is folded into the flat iron hollow slot 2 after completion.

[0037] In summary, the utility model has a simple structure and is easy to use. It achieves the purpose of separating high and low grade concrete by setting a fan-shaped device. All its manufacturing materials are common materials on the construction site, with low cost and can be used in turn. It can be installed before pouring, and can be taken out in time after pouring is completed and used at the next node, solving the problems of difficulty and slow speed in tying dense wire mesh and inability to be removed after installation. In addition, compared with the existing high and low grade concrete separation device using air bags, it is simple to operate and low cost.

Claims

1. A high- and low-grade concrete separation device at beam-column joints, characterized in that: It includes a slotted hollow bracket, a flat iron hollow slot and a fan-shaped device. The slotted hollow bracket is provided with a plurality of through-going mounting holes at intervals. Each mounting hole is provided with a vertical steel support leg. A flat iron hollow slot is provided below the slotted hollow bracket, and a fan-shaped device is provided inside the flat iron hollow slot. The fan-shaped device includes fan ribs and triangular flexible material. A thin wire rod is connected to the center of the bottom of the flat iron hollow groove. Multiple fan ribs of different lengths are inserted into the outside of the thin wire rod from front to back, and each adjacent fan rib is connected by a triangular flexible material. Short strip baffles with an opening width smaller than the width of the flat iron hollow groove are welded to the ends of the fan ribs on the front and the rear. A steel spoke is hinged on each short strip baffle, and a control rod is hinged on the upper end of each steel spoke. Two guide rings are provided on opposite sides of the flat iron hollow groove at an upper and lower interval. The upper end of the control rod passes through the two guide rings at corresponding positions from bottom to top and is located above the flat iron hollow groove. A fixed shaft is fixed to the center of the upper part of the flat iron hollow groove, and the upper end of the fan rib in the middle is fixedly connected to the fixed shaft. The inner side of the slot of the slotted hollow bracket is slidably connected with a movable fixing bracket, and one end of the movable fixing bracket far away from the slotted hollow bracket is connected with the fixed shaft.

2. A high- and low-grade concrete separation device at a beam-column joint according to claim 1, characterized in that: It also includes a fixing mouth. A fixing mouth is provided at the connection between each vertical steel bar support leg and the slotted hollow bracket. The diameter of the fixing mouth is smaller than the opening width of the slotted hollow bracket.

3. The high- and low-grade concrete separation device at the beam-column joint according to claim 1, characterized in that: It also includes a steel wire, which is used to fix the upper end of the middle fan rib and the fixed shaft.

4. The high- and low-grade concrete separation device at the beam-column joint according to claim 1, characterized in that: The utility model also comprises a soft steel wire, through which the fixed shaft and the movable fixing frame are connected.

5. The high- and low-grade concrete separation device at beam-column joints according to claim 1, characterized in that: The height of the guide ring located at the lower position in the hollow groove of the flat iron is greater than the sum of the lengths of the outermost fan rib and the steel spokes connected thereto.

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