Reinforcing steel bar penetrating and conveying equipment and method for silo slip-form construction

Abstract

The invention relates to the technical field of silo slip-form construction assistance, in particular to steel bar penetrating and conveying equipment and method for silo slip-form construction, and the penetrating and conveying method comprises the steps that a plurality of conveying mechanisms are selected to be spliced along open frames arranged on the two sides of a silo slip-form in the circumferential direction, and steel bars are moved to a steel bar bending machine to be bent and formed; the formed reinforcing steel bars are output from the output end of the reinforcing steel bar arc bending machine and enter the corresponding roller conveyors to be conveyed; the formed steel bars are detected by a sensor moving to the designated position, a baffle is adjusted to descend, and a push plate is adjusted to push out the multiple formed steel bars to fall onto a slip form platform; the penetrating and conveying equipment is applied to the penetrating and conveying method, each roller conveyor comprises multiple sections of conveying mechanisms arranged in the circumferential direction, a working groove is formed between every two conveying mechanisms, and the working grooves are located above a slip form platform; at least one steel bar arc bending machine is arranged and is positioned at the end part of the roller conveyor; the device can still efficiently operate in a narrow or limited space of the opening frame, the automation degree is high, and the applicability is high.

Description

Technical Field

[0001] This invention relates to the field of auxiliary technology for silo slipform construction, and in particular to a rebar feeding device and method for silo slipform construction. Background Technology

[0002] Slipform construction of silos is a crucial step in the construction of silo-type buildings, offering advantages such as high construction efficiency, short construction period, and low construction cost. The installation of the ring-shaped reinforcing bars along the horizontal direction is a key process. Current technology uses a reinforcing bar bending machine for bending and a simple device for conveying the bent bars, which has the following drawbacks: the conveying power comes from the reinforcing bar bending machine, placing high demands on the machine's mechanical load and making it prone to jamming; it also involves high levels of manual intervention, leading to deformation of the pushed reinforcing bars and limiting forming accuracy.

[0003] Existing equipment for rebar feeding, such as the railcar device and method for rebar feeding in silos disclosed in CN112227729B, uses a bending machine in conjunction with an arc-shaped conveying track. Multiple railcars are evenly spaced on the track, and hooks are set below the railcars. The rebar is bent and moved along the hook by pushing the previous rebar with the next formed rebar. After the formed rebar is moved to the appropriate position by the bending machine, it needs to be removed manually. There is a lack of corresponding rebar positioning and pushing equipment. The construction environment under the scaffold is limited, which affects the construction efficiency. The conveying power comes from the rebar bending machine.

[0004] For example, CN112124939A discloses a conveying track device and method for threading reinforcing bars in silos, which includes an arc-shaped upper rail, a sliding lower rail, a radial sliding drive device for the lower rail, and a bending conveyor. The bending conveyor bends the reinforcing bars and sends them into the arc-shaped groove between the arc-shaped upper rail and the sliding lower rail. The conveying of the reinforcing bars relies entirely on the bending conveyor. When it is necessary to release the circumferential reinforcing bars, the radial sliding drive device for the lower rail drives the sliding lower rail to retract, and the reinforcing bars fall freely. However, when a single circumferential reinforcing bar needs to fall sequentially, the bending conveyor needs to stop bending and conveying until the previous circumferential reinforcing bar falls, and then the bending machine starts working again. The degree of automation is low, and there is a possibility that it cannot be synchronized with the speed of slipform construction. During this process, the reinforcing bars in the bending process of the bending machine push against the reinforcing bars after the previous bending and move, and the conveying power comes from the reinforcing bar bending machine. Summary of the Invention

[0005] The purpose of this invention is to provide a rebar feeding device and method for slipform construction of silos, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A method for threading reinforcing bars in slipform construction of silos includes the following steps:

[0008] S1: Select several transport mechanisms and splice them together along the circumferential frame of the silo slipform platform. Two sets of inner and outer roller conveyors are concentrically arranged along the radial direction of the silo. Install a push-out mechanism on the side of the two sets of roller conveyors that are far apart from each other, and install a lifting and protection mechanism on the other side. Install a sensor on the side where the lifting and protection mechanism is installed. Select transport mechanisms at intervals and install drive mechanisms. Install the rebar bending machine at one end of the roller conveyor.

[0009] S2: Move the steel bar to the input end of the steel bar bending machine and bend it into shape according to the set steel bar curvature parameters. The shaped steel bar is output from the output end of the steel bar bending machine and enters the corresponding roller conveyor for conveying. During the conveying of the shaped steel bar, adjust the lifting and protection mechanism to move the baffle upward to the appropriate position.

[0010] S3: The sensor detects the movement of the formed steel bars until the sensor at the designated position detects the formed steel bars. The baffle is adjusted to descend, and the push plate is adjusted to push out multiple formed steel bars and fall into the sliding formwork platform.

[0011] S4: Repeat S2-S3 above, stack multiple shaped steel bars on the slipform platform to form a ring-shaped steel bar bundle, and tie the ring-shaped steel bar bundle into shape.

[0012] A rebar conveying device for silo slipform construction, applied to the aforementioned rebar conveying method for silo slipform construction, includes a roller conveyor and a rebar bending machine. The slipform platform for silo slipform construction includes several circumferentially arranged slats. Two sets of roller conveyors are concentrically arranged radially along the silo and located below the slats. Each set of roller conveyors includes multiple transport mechanisms arranged sequentially circumferentially. The lower sides of the slats are respectively connected to one transport mechanism of each set of roller conveyors, forming a working trough between the transport mechanisms on both sides of the slats. The working trough is located above the slipform platform. The roller conveyor also includes a pushing mechanism and a lifting and protective mechanism. The lifting and protective mechanism is installed on the side of each transport mechanism closest to the working trough, and the pushing mechanism is installed on the side furthest from the working trough. The lifting and protective mechanism drives the baffle to rise and fall through a gear and rack structure, and the pushing mechanism drives the push plate to move through an air pump. At least one rebar bending machine is provided, located at the end of the roller conveyor.

[0013] Preferably, the rebar bending machine further includes a base and a gearbox; the two ends of the upper surface of the base are fixedly connected to the gearbox through fixedly installed lifting plates; two guide wheels are rotatably installed on one side of the gearbox at intervals, and an adjusting wheel is rotatably installed on the other side; one end of the gearbox is the rebar input end, and the other end is the shaped rebar output end, which is connected to the end of the roller conveyor.

[0014] Preferably, a push plate is slidably disposed at the bottom of the gearbox, and an adjusting wheel is rotatably disposed below the push plate via a bearing; a limit rod is threadedly connected to the side of the bottom of the gearbox away from the adjusting wheel, and the limit rod abuts against or separates from the side wall of the push plate; a fixed guide rail is fixedly disposed on one side inside the gearbox, and the fixed guide rail is connected to the push plate via a slidingly connected moving rack.

[0015] Preferably, a driving gear is rotatably arranged on the other side of the gearbox, and driven gears are respectively meshed and driven on both sides of the driving gear. The lower part of the driven gear is coaxially driven and connected to the guide wheel.

[0016] Preferably, each group of roller conveyors further includes a drive mechanism, wherein at least one section of the transport mechanism is provided with a drive mechanism, and the drive mechanism realizes the action of the transport mechanism through a transmission sprocket structure.

[0017] Preferably, lifting racks are vertically fixed at both ends of the lower surface of the baffle, and mounting boxes are fixed at both ends of the transport mechanism. Lifting gears are rotatably installed inside the mounting boxes. The two lifting gears are coaxially driven, and the lifting gears mesh with the lifting racks. The racks are slidably connected to the mounting boxes.

[0018] Preferably, the transport mechanism includes mounting rods on both sides, which are fixedly connected to the frame, and sensors are installed on the mounting rods.

[0019] Preferably, it also includes a control module, which is electrically connected to the air pump and the sensor.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] This invention provides a rebar conveying device for silo slipform construction. A rebar bending machine is connected to a modular roller conveyor, which is composed of several standardized transport mechanisms. The conveyor can be flexibly deployed according to the spatial conditions of the construction site, with an overall arc or ring path to ensure that the formed rebar can smoothly enter the guide rail and achieve continuous conveying. Circumferential rebar is automatically conveyed along the roller conveyor. An air pump installed on the transport mechanism drives and pushes out the circumferential rebar, maintaining neat placement and facilitating subsequent centralized bundling, significantly improving work efficiency. During rebar conveying, the lifting and protective mechanism is adjusted to raise the baffle, preventing the circumferential rebar from slipping during transport. When the circumferential rebar moves to the lowering position, the baffle is lowered to facilitate the operation of the ejection mechanism.

[0022] This invention provides a rebar feeding device for slipform construction of silos. By rotating a handle, a worm gear is driven to rotate, which in turn drives a worm wheel to rotate. The worm wheel further drives a gear and rack mechanism to move the adjusting wheel. The relative position between the adjusting wheel and the guide wheel can be precisely controlled by a limit rod threaded on the gearbox, outputting circumferential rebars of various curvatures to adapt to silos of various specifications.

[0023] The present invention provides a method for feeding rebar in silo slipform construction, which is applied to a rebar feeding equipment for silo slipform construction. It can still operate efficiently in narrow or confined spaces of the scaffold, without manual intervention, with a high degree of automation, high rebar forming accuracy, low mechanical load on the rebar bending machine, and smooth operation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the rebar conveying equipment for silo slipform construction according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the connection structure between a support frame and a powered transport mechanism in a roller conveyor, according to one embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the connection structure between a support frame and a non-powered transport mechanism in a roller conveyor, according to one embodiment of the present invention.

[0027] Figure 4 This is a schematic diagram of the connection structure of the transportation mechanism according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the mechanism connection structure according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the connection structure of the lifting and protection mechanism according to an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the connection structure of the rebar bending machine in the front view according to an embodiment of the present invention;

[0031] Figure 8 This is a cross-sectional view of the connection between the gearbox and the rotary handle in an embodiment of the present invention;

[0032] Figure 9 This is a cross-sectional view of the rebar bending machine according to an embodiment of the present invention from another side.

[0033] Figure 10 This is a sectional view of a rebar bending machine according to an embodiment of the present invention;

[0034] Figure 11 This is a schematic diagram of the connection between the guide wheel and the driven gear in an embodiment of the present invention;

[0035] Figure 12 This is a schematic diagram of the connection structure of the limiting rod, guide wheel, adjusting wheel and propulsion plate in an embodiment of the present invention;

[0036] Figure 13 This is a schematic diagram of the connection between the drive mechanism and the transport mechanism in an embodiment of the present invention.

[0037] Reference numerals: 1. Roller conveyor; 11. Transport mechanism; 1101. Conveyor roller; 1102. Rotating rod; 1103. Transmission belt; 12. Drive mechanism; 1201. Adjusting motor; 1202. Reducer; 1203. Transmission chain; 13. Pushing mechanism; 1301. Push plate; 1303. Air pump; 14. Fixed plate; 15. Lifting and protective mechanism; 1501. Lifting motor; 1502. Mounting box; 1503. Lifting rack; 1504. Baffle; 1505. Lifting gear; 16. Sensor; 17. Mounting rod; 2. Rebar bending machine; 21. Moving roller; 22. Base; 23. Adjusting wheel; 24. Push plate 25. Guide wheel; 26. Limiting rod; 27. Gearbox; 28. Drive motor; 29. ​​Rotary handle; 2701. Mounting bearing seat; 2702. Coupling; 2703. Worm gear; 2704. Cylindrical bearing; 2705. Cylindrical gear; 2706. Vertical base; 2707. Fixed guide rail; 2708. Moving rack; 2709. Rotating shaft; 2710. Matching bearing; 2712. Driven gear; 2713. Driving gear; 2714. Bushing; 2715. Connecting bearing seat; 2501. Socket head screw; 2502. Lower end cover plate; 2503. Connecting key; 3. Opening frame; 31. Suspension frame; 32. Support frame. Detailed Implementation

[0038] 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.

[0039] In the following description of the invention, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. The term "connection" simply indicates a connection between devices and has no special meaning.

[0040] Furthermore, the technical fields and installation methods involved in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] For specific implementation examples, please refer to: Figures 1-13 A rebar conveying device for silo slipform construction includes a roller conveyor 1 and a rebar bending machine 2. The slipform platform for silo slipform construction includes several slatted frames 3 evenly arranged along the circumference of the silo. Two sets of roller conveyors 1 are arranged concentrically along the radial direction of the silo and located below the slatted frames 3. Each set of roller conveyors 1 includes multiple transport mechanisms 11 arranged approximately in an arc shape along the circumference of the silo. The lower sides of the slatted frames 3 are respectively connected to one section of the transport mechanism 11 of each set of roller conveyors 1, forming a working trough between the transport mechanisms 11 on both sides of the lower part of the slatted frames 3. The roller conveyor 1 also includes an ejection mechanism 13 and a lifting and protection mechanism 15. The lifting and protection mechanism 15 is installed on the side of each transport mechanism 11 near the working groove, and the ejection mechanism 13 is installed on the side away from the working groove. The lifting and protection mechanism 15 drives the baffle 1504 to rise and fall through the gear and rack structure. The baffle 1504 can prevent the formed steel bars from falling off the transport mechanism 11. The ejection mechanism 13 drives the push plate 1301 to push the formed steel bars through the air pump 1303 and fall down. The working groove is located above the slipform platform. At least one steel bar bending machine 2 is provided. The steel bar bending machine 2 is located at the end of the roller conveyor 1.

[0042] The pre-cut steel bars are moved to the input end of the steel bar bending machine 2. The steel bar bending machine 2 is started, and the steel bars are cold-bent into shape according to the steel bar curvature parameters set in the silo design scheme. The shaped steel bars are consistent with the curvature of the silo. The shaped steel bars are automatically output from the output end of the steel bar bending machine 2 via the transport mechanism 11 or pushed by the subsequent shaped steel bars, and are transported onto the roller conveyor 1 corresponding to the output end of the steel bar bending machine 2. The roller conveyor 1 is approximately consistent with the curvature of the shaped steel bars. In this embodiment, the multiple transport mechanisms 11 of each set of roller conveyors 1 are spliced ​​to form two semi-circular conveying tracks. A gap is set between the two conveying tracks of each set. The steel bar bending machine 2 can be placed in the gap between the two conveying tracks for segmented construction. Alternatively, multiple steel bar bending machines 2 can be placed in the gap between the two conveying tracks for simultaneous construction. In other embodiments, the multiple transport mechanisms 11 of each set of roller conveyors 1 can be spliced ​​to form an approximately circular conveying track. A gap is set between the beginning and end of each conveying track for placing the steel bar bending machine 2 for operation.

[0043] Each transport mechanism 11 includes mounting rods 17 on both sides, and is mounted to the frame 3 via the mounting rods 17; each transport mechanism 11 includes multiple conveying rollers 1101, multiple rotating rods 1102, and several transmission belts 1103. The conveying rollers 1101 and rotating rods 1102 correspond one-to-one. The conveying rollers 1101 are rotatably mounted on the rotating rods 1102. Adjacent conveying rollers 1101 are driven by the transmission belts 1103. Figure 4 As shown, taking three adjacent conveying rollers 1101 in one section of the conveying mechanism 11 as an example, each rotating rod 1102 has two pulleys sleeved at both ends. One pulley at each end is connected to the pulley on the adjacent rotating rod 1102 on one side through the transmission belt 1103, and the other pulley at each end is connected to the pulley on the adjacent rotating rod 1102 on the other side through the transmission belt 1103. The pulley and the transmission belt 1103 can be a toothed pulley and a toothed synchronous belt structure, or a sprocket and a chain structure. The specific structure and connection method are existing technologies and will not be described in detail here.

[0044] The roller conveyor 1 further includes a drive mechanism 12 and a fixed plate 14; preferably, the three sequentially arranged transport mechanisms 11 are provided with one drive mechanism 12, and the powered transport mechanism 11 with the drive mechanism 12 is followed by two unpowered transport mechanisms 11 in sequence; the drive mechanism 12 includes an adjusting motor 1201, a reducer 1202 and a transmission chain 1203, the adjusting motor 1201 is installed below the transport mechanism 11, the output shaft of the adjusting motor 1201 is fixedly connected to the reducer 1202, and a transmission sprocket is fixedly installed on the reducer 1202, corresponding to the starting point of the transport mechanism 11. The rotating rod 1102 of the position is equipped with a transmission wheel, and a transmission chain 1203 is wound around the transmission sprocket and the transmission wheel, thereby driving the transport mechanism 11 to work. The shaped steel bars output by the powered transport mechanism 11 enter the unpowered transport mechanism 11 under the action of its own inertia and forward thrust, and drive the conveying roller 1101 on the unpowered transport mechanism 11 to rotate. The shaped steel bars are continuously conveyed forward along the unpowered transport mechanism 11, thereby realizing the continuous conveying by one section of powered transport mechanism 11 and two sections of unpowered transport mechanism 11, ensuring that the shaped steel bars are conveyed on the circular path of the roller conveyor 1.

[0045] The open frame 3 includes a suspension frame 31 and a support frame 32. The support frame 32 is fixedly installed on the inner side of the lower part of the suspension frame 31. A protrusion is provided at the end of the support frame 32. The transport mechanism 11 is installed on the support frame 32. The protrusion is fixedly connected to the mounting rod 17. An inclined rod is provided at the lower part of the support frame 32 for support.

[0046] Preferably, each segment of the transport mechanism 11 is provided with multiple sets of ejection mechanisms 13, and multiple fixed plates 14 are fixedly arranged at intervals on the side of each segment of the transport mechanism 11. A clearance groove is provided between two adjacent fixed plates 14, and the ejection mechanism 13 is installed in the clearance groove; for example... Figure 2 As shown, two fixed plates 14 are provided on the side of the transport mechanism 11. Taking a set of push-out mechanism 13 as an example, the fixed end of the air pump 1303 is fixedly set on the transport mechanism 11. The telescopic end of the air pump 1303 is fixedly connected to the push plate 1301. The push plate 1301 can pass through the clearance groove and move to the top of the transport mechanism 11, thereby pushing the formed steel bar to move. After the telescopic end of the air pump 1303 retracts, the push plate 1301 is initially located outside the conveying roller 1101, which facilitates the movement of the formed steel bar on the conveying roller 1101.

[0047] Each set of lifting and protective mechanisms 15 further includes a lifting motor 1501, a mounting box 1502, a lifting rack 1503, and a lifting gear 1505. Two mounting boxes 1502 are provided, fixedly mounted at both ends of the bottom of the transport mechanism 11. A drive shaft rotatably passes between the two mounting boxes 1502, driven by the lifting motor 1501. A lifting gear 1505 is rotatably mounted inside each mounting box 1502. The drive shaft is fixedly connected to the lifting gear 1505. A lifting rack 1503 meshes with one side of the lifting gear 1505, and the lifting rack 1503 is connected to a corresponding mounting box 1502. The upper end of the lifting rack 1503 is fixedly connected to the baffle 1504 via a sliding connection. When the formed steel bar passes through, the lifting motor 1501 starts, driving the lifting gear 1505 to rotate, causing the lifting rack 1503 to drive the baffle 1504 to rise or fall. The baffle 1504 moves upward until its upper end is higher than the upper surface of the conveying roller 1101, which can be used to prevent the formed steel bar from falling off the transport mechanism 11. If the formed steel bar moves to the designated position, the baffle 1504 is adjusted to move downward, and the push plate 1301 moves to push the formed steel bar out through the working groove and fall into the sliding mold platform. After the formed steel bar is pushed out, the pushing mechanism 13 is reset, which facilitates the subsequent movement and transportation of the formed steel bar.

[0048] A rebar conveying device for silo slipform construction also includes a control module. A sensor 16 is installed on the mounting rod 17. The sensor 16 can be used to detect whether there are formed rebars passing on the transport mechanism 11. The control module is electrically connected to the sensor 16. The sensor 16 detects the circumferential rebars and transmits the detected signal to the control module. The control module is electrically connected to the air pump 1303, the lifting motor 1501, and the adjusting motor 1201. The control module can adjust the start of the lifting motor 1501 and the adjusting motor 1201 to convey the circumferential rebars. The control module adjusts the operation of the air pump 1303 according to the position of the circumferential rebars to push the circumferential rebars into the slipform platform.

[0049] The rebar bending machine 2 also includes a base 22, a push plate 24, and a gearbox 27. The base 22 has four rotatable rollers 21 at its four corners to move the rebar bending machine 2. Lifting plates are fixedly installed at both ends of the upper surface of the base 22. Two guide wheels 25 are rotatably installed on one side of the space below the lifting plates, and an adjusting wheel 23 is rotatably installed on the other side. One end of the guide wheel 25 is the rebar input end inside the rebar bending machine 2, and the other end is the output end of the formed rebar. The direction in which the rebar is fed into the rebar bending machine 2 is as follows: Figure 12 As indicated by the arrow, one end of the steel bar passes between the guide wheel 25 and the adjusting wheel 23. After being bent by the cooperation of the guide wheel 25 and the adjusting wheel 23, it passes out from the other side of the guide wheel 25 and the adjusting wheel 23. The output end of the formed steel bar is connected to the roller conveyor 1.

[0050] A gearbox 27 is fixedly installed above the lifting plate, and a drive motor 28 is fixedly installed above the gearbox 27. The drive motor 28 is electrically connected to the control module. The output shaft of the drive motor 28 passes through the gearbox 27 and is fixedly connected to the driving gear 2713. Driven gears 2712 are meshed and driven on both sides of the driving gear 2713. A mating shaft is fixedly installed inside the driven gear 2712. The mating shaft passes through the gearbox 27 and extends downward to connect with the base 22. The mating shaft is connected to the connecting bearing seat 2715 at the bottom of the gearbox 27 through a mating bearing 2710 to prevent axial detachment during operation. The guide wheel 25 is fixedly connected to the mating shaft through a connecting key 2503. The mating shaft is supported by the mating bearing 2710 that mates with the bushing 2714 to seal and prevent dust from entering. The rotational power of the driven gear 2712 above is transmitted to the guide wheel 25 below, driving the guide wheel 25 to rotate.

[0051] Specifically, a positioning hole is provided at the lower end of the connecting shaft, and a lower end cover plate 2502 is provided at the lower end of the guide wheel 25. The lower end cover plate 2502 is fastened by inserting hexagonal screws 2501 into the positioning hole in sequence, which can effectively prevent the connecting shaft from falling.

[0052] A push plate 24 is slidably mounted on the bottom of the gearbox 27. The push plate 24 is rotatably connected to the adjusting wheel 23 via a bearing. A fixed guide rail 2707 is fixedly mounted on the inner side wall of the gearbox 27 to limit the running direction of the push plate 24 and provide stable support. A movable rack 2708 is slidably connected to the fixed guide rail 2707. The movable rack 2708 is fixedly connected to the upper end of the push plate 24. A cylindrical gear 2705 is meshed on the side of the movable rack 2708. The movable rack 2708 drives the cylindrical gear 2705 to rotate through a worm gear 2703 structure to move, thereby driving the adjusting wheel 23 to move in a straight line to adjust its position, so as to bend the steel bar according to different curvature requirements. When the guide wheel 25 rotates to drive the steel bar to bend, the adjusting wheel 23 can rotate synchronously to match the stress state of the steel bar. This setting can realize the step-by-step transmission and smooth conversion of power, which not only ensures the linear movement accuracy of the push plate 24, but also ensures the rotational coordination of the steel bar during the bending process.

[0053] The gearbox 27 is connected to a limit rod 26 by a thread on the side away from the adjusting wheel 23. The limit rod 26 abuts against or separates from the side wall of the push plate 24 to limit the movement distance of the push plate 24 and prevent it from exceeding the predetermined adjustment range. It can apply a precise and uniform bending moment to steel bars of different specifications and lengths to ensure that the bending angle and bending radius of the steel bars meet the construction design requirements. The diameter of the steel bars is in the range of 16~28mm.

[0054] Specifically, taking a steel bar with a diameter of 25mm and a length of 9m as an example, the radius R of the bending arc of the steel bar is:

[0055] ,

[0056]

[0057] Where L is the center distance between the two guide wheels 25; y is the midpoint compression sag, which is the vertical distance from the midpoint of the original straight state of the steel bar to the lowest point of the curved arc after compression; S is the arc length.

[0058] When adjusting the adjusting wheel 23 to adapt to different steel bar curvatures, first adjust the limit rod 26 to move the set length and record it, then adjust the push plate 24 to move until it abuts against the limit rod 26. The downward pressure y of the steel bar is approximately equal to the set length of the limit rod 26.

[0059] See Table 1 below for the R values ​​corresponding to common y values.

[0060] Table 1. R corresponding to common y values.

[0061]

[0062] A rotating handle 29 is rotatably mounted inside the gearbox 27. The rotating handle 29 passes through the gearbox 27 and is connected to the worm gear 2703 via a coupling 2702. The coupling 2702 not only transmits torque but also compensates for minor installation deviations and absorbs impact loads. A vertical base 2706 is mounted at the other end of the worm gear 2703. The vertical base 2706 is fixedly connected to the gearbox 27 and rotatably connected to the worm gear 2703. The rotating handle 29 is connected to the gearbox 27 via a bearing housing 2701 and its internal bearings, ensuring stable support when bearing external loads and resisting torsional forces. The worm gear 2703 structure has good self-locking performance to ensure the worm gear 2703 remains horizontal during rotation. Degree and stability; a rotating shaft 2709 is rotatably installed inside the gearbox 27. The upper and lower ends of the rotating shaft 2709 are respectively rotatably connected to cylindrical bearings 2704 fixed on the upper and lower sides of the gearbox 27, ensuring the smooth operation of the rotating shaft 2709 under high-speed rotation; a worm gear is fixedly sleeved on the upper part of the rotating shaft 2709, which is connected to the worm 2703; a cylindrical gear 2705 is fixedly sleeved on the lower part of the rotating shaft 2709, which is meshed with the moving rack 2708; when adjusting the position of the adjusting wheel 23, the rotating handle 29 is rotated, causing the worm 2703 to drive the rotating shaft 2709 and the cylindrical gear 2705 to rotate, thereby driving the moving rack 2708 to move along the fixed guide rail 2707, and thus causing the adjusting wheel 23 to move.

[0063] A method for feeding reinforcing bars in silo slipform construction, using the aforementioned reinforcing bar feeding equipment for silo slipform construction, includes the following steps:

[0064] S1: Select several transport mechanisms 11 and splice them together along the circumferential frame 3 of the silo slipform platform. Two sets of inner and outer roller conveyors 1 are concentrically arranged along the radial direction of the silo. Install a push-out mechanism 13 on the side of the two sets of roller conveyors 1 where the transport mechanisms 11 are far apart, and install a lifting and protection mechanism 15 on the side of the two sets of roller conveyors 1 where the transport mechanisms 11 are close together. Install a sensor 16 on the side where the lifting and protection mechanism 15 is installed. Select transport mechanisms 11 at intervals and install drive mechanisms 12. Install the rebar bending machine 2 to one end of the roller conveyor 1.

[0065] Specifically, the center line of the output end of the rebar bending machine 2 is about 15cm lower than the lower beam of the suspension frame 31 and the lifting protection mechanism. At the same time, it is ensured that the clearance between the output end and the operating surface of the sliding formwork platform is not less than 40cm to ensure that the rebar can be smoothly discharged after forming. Several transport mechanisms 11 are fixedly connected by bolts or pins to ensure accurate installation position. Preferably, the width of the transport mechanism 11 is designed to be 15cm. The length of the rebar is at least three times the length of the transport mechanism 11.

[0066] In one embodiment, taking a silo with a diameter of 27m as an example, its inner wall radius is approximately 13.5m. The length of the selected transport mechanism 11 is set to 3m. According to the perimeter calculation formula, at least 28 transport mechanisms 11 need to be spliced ​​together to form an approximately circular conveyor track.

[0067] The diameter D of the reinforcing bar is set to 25mm and the length to 9m. The gap between two adjacent conveying rollers 1101 in each conveying mechanism 11 is... The calculation formula is:

[0068]

[0069] Then, the gap between two adjacent conveyor rollers 1101 It should be less than 10mm;

[0070] The width of the selected conveyor roller 1101 The calculation formula is:

[0071]

[0072] in, To ensure a safe operating factor, a value of 1.5 is used here; The value range for assembly error and vibration allowance is 0.5–1.0 of the steel bar diameter, and 1 is taken here;

[0073] Therefore, the minimum width of conveyor roller 1101 It is 150mm;

[0074] The central angle corresponding to each transportation agency 11 Calculation yields: .

[0075] S2: Move the steel bar to the input end of the steel bar bending machine 2 and bend it into shape according to the set steel bar curvature parameters. The shaped steel bar is output from the output end of the steel bar bending machine 2 and enters the corresponding roller conveyor 1 for conveying. During the conveying of the shaped steel bar, adjust the lifting and protection mechanism 15 so that the baffle 1504 moves upward to a suitable position.

[0076] S3: Sensor 16 detects the movement of the formed steel bar until sensor 16 at the designated position detects the formed steel bar. Adjust baffle 1504 to descend and push plate 1301 to push out multiple formed steel bars and drop them onto the sliding formwork platform.

[0077] S4: Repeat S2-S3 above, stack multiple shaped steel bars on the slipform platform to form a ring-shaped steel bar bundle, and tie the ring-shaped steel bar bundle into shape.

[0078] Specifically, after the first shaped steel bar is placed, the steel bar bending machine 2 and the roller conveyor 1 can continue to bend and transport the next steel bar. Multiple steel bars are bent, transported and pushed down in sequence, and stacked layer by layer on the previous steel bar to form a multi-layered ring steel bar bundle, providing the necessary foundation for the subsequent steel bar skeleton.

[0079] Furthermore, construction workers can simultaneously perform binding operations on the slipform platform below, using binding tools or automatic binding machines to connect the horizontal ring reinforcement bars to the pre-fixed vertical reinforcement bars one by one at the designed nodes until a complete spatial reinforcement skeleton network is formed. This parallel construction of automated reinforcement conveying and manual binding not only significantly improves construction efficiency but also greatly reduces the dangers of manual handling and high-altitude operations, enabling the reinforcement installation process of the silo to achieve an efficient, safe, and continuous assembly-line construction mode.

Claims

1. A method for threading reinforcing bars during slipform construction of silos, characterized in that: Includes the following steps: S1: Select several transport mechanisms and splice them together along the circumferential frame of the silo slipform platform. Two sets of inner and outer roller conveyors are concentrically arranged along the radial direction of the silo. Install a push-out mechanism on the side of the two sets of roller conveyors that are far apart from each other, and install a lifting and protection mechanism on the other side. Install a sensor on the side where the lifting and protection mechanism is installed. Select transport mechanisms at intervals and install drive mechanisms. Install the rebar bending machine at one end of the roller conveyor. S2: Move the steel bar to the input end of the steel bar bending machine and bend it into shape according to the set steel bar curvature parameters. The shaped steel bar is output from the output end of the steel bar bending machine and enters the corresponding roller conveyor for conveying. During the conveying of the shaped steel bar, adjust the lifting and protection mechanism to move the baffle upward to the appropriate position. S3: The sensor detects the movement of the formed steel bars until the sensor at the designated position detects the formed steel bars. The baffle is adjusted to descend, and the push plate is adjusted to push out multiple formed steel bars and fall into the sliding formwork platform. S4: Repeat S2-S3 above, stack multiple shaped steel bars on the slipform platform to form a ring-shaped steel bar bundle, and tie the ring-shaped steel bar bundle into shape.

2. A rebar conveying device for silo slipform construction, applied to the rebar conveying method for silo slipform construction as described in claim 1, characterized in that: The system includes roller conveyors and rebar bending machines. The slipform platform for silo slipform construction includes several circumferentially arranged trusses. Two sets of roller conveyors are concentrically arranged radially along the silo and located below the trusses. Each set of roller conveyors includes multiple transport mechanisms arranged sequentially along the circumferential direction. The lower sides of the trusses are connected to one of the transport mechanisms of each set of roller conveyors, forming a working trough between the transport mechanisms on both sides of the trusses. The working trough is located above the slipform platform. The roller conveyors also include a pushing mechanism and a lifting and protection mechanism. The lifting and protection mechanism is installed on the side of each transport mechanism closest to the working trough, and the pushing mechanism is installed on the side away from the working trough. The lifting and protection mechanism drives the baffle to rise and fall through a gear and rack structure, and the pushing mechanism drives the push plate to move through an air pump. At least one rebar bending machine is provided and is located at the end of the roller conveyors.

3. The rebar conveying equipment for silo slipform construction according to claim 2, characterized in that: The rebar bending machine also includes a base and a gearbox; the two ends of the upper surface of the base are fixedly connected to the gearbox through fixed lifting plates; two guide wheels are rotatably arranged on one side of the gearbox at intervals, and an adjusting wheel is rotatably arranged on the other side; one end of the gearbox is the rebar input end, and the other end is the shaped rebar output end, which is connected to the end of the roller conveyor.

4. The rebar conveying equipment for silo slipform construction according to claim 3, characterized in that: A push plate is slidably mounted on the bottom of the gearbox, and an adjusting wheel is rotatably mounted below the push plate via a bearing; a limit rod is threadedly connected to the side of the gearbox away from the adjusting wheel, and the limit rod abuts against or separates from the side wall of the push plate; a fixed guide rail is fixedly mounted on one side inside the gearbox, and the fixed guide rail is connected to the push plate via a slidingly connected moving rack.

5. The rebar conveying equipment for silo slipform construction according to claim 3, characterized in that: A drive gear is rotatably mounted on the other side of the gearbox. Driven gears are meshed and connected to both sides of the drive gear. The lower part of the driven gear is coaxially connected to the guide wheel.

6. The rebar conveying equipment for silo slipform construction according to claim 2, characterized in that: Each set of roller conveyors also includes a drive mechanism, and at least one section of the transport mechanism is equipped with a drive mechanism. The drive mechanism realizes the action of the transport mechanism through a transmission sprocket structure.

7. The rebar conveying equipment for silo slipform construction according to claim 2, characterized in that: Lifting racks are vertically fixed at both ends of the lower surface of the baffle, and mounting boxes are fixed at both ends of the transport mechanism. Lifting gears are rotatably installed inside the mounting boxes. The two lifting gears are coaxially driven, and the lifting gears mesh with the lifting racks. The racks are slidably connected to the mounting boxes.

8. The rebar conveying equipment for silo slipform construction according to claim 2, characterized in that: The transport mechanism includes mounting rods on both sides, which are fixedly connected to the frame, and sensors are installed on the mounting rods.

9. The rebar conveying equipment for slipform construction of silos according to claim 8, characterized in that: It also includes a control module, which is electrically connected to the air pump and sensors.

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