Guide device for cast-in-situ bored pile construction
By installing a combined telescopic guide pipe and an electrically controlled spiral scraper mechanism at the lower end of the guide hopper, the problem of obstructed material guiding during bored pile construction was solved, achieving continuous and efficient material guiding and ensuring construction quality.
Patent Information
- Application Number
- CN202511602834.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-04
- Publication Date
- 2026-02-24
AI Technical Summary
In existing bored pile construction, problems such as pipe blockage, pipe jamming, inability to pull out guide pipes, pile necking, or poor concrete diffusion often occur, affecting the material delivery effect.
The material guide hopper is fitted with a combined telescopic guide pipe at the lower end, combined with an electrically controlled spiral scraper guide mechanism and an embedded worm gear adjustment component, to achieve uniform and continuous material conveying and avoid frequent pipe disassembly.
It improves the continuity and efficiency of material delivery, reduces construction time, lowers the risk of pipe blockage, and ensures smooth concrete flow and pile integrity.
Smart Images
Figure CN121556462A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of building construction technology, and in particular to a material guiding device for bored pile construction. Background Technology
[0002] The construction of bored piles can be roughly divided into three main stages: pre-drilling preparation, drilling process, and pile formation process.
[0003] (a) Preparations before drilling Site leveling and surveying: Clean and level the construction site, use a total station and other equipment to accurately mark the center point of the pile position, and set up protective piles for verification.
[0004] Installing casing: Steel or concrete casings are installed at the pile location. Their functions are: positioning and guidance, preventing the borehole opening from collapsing, and maintaining the water head pressure inside the borehole (higher than the groundwater level).
[0005] Drilling rig positioning and commissioning: Move the drilling rig to the pile location and adjust its levelness and verticality to ensure that the center of the drill bit coincides with the center of the pile location.
[0006] (II) Hole Formation Process Drilling: Select different drilling rigs (such as rotary drilling rigs, gyratory drilling rigs, impact drilling rigs, etc.) according to geological conditions. During the process, control the drilling speed to prevent hole collapse and deviation, and remove excavated soil in a timely manner.
[0007] Hole cleaning: After drilling to the design elevation, the hole needs to be cleaned to remove sediment from the bottom. This is usually done in two steps: One-time hole cleaning: This is carried out immediately after hole drilling to replace the mud and reduce the thickness of sediment.
[0008] Secondary hole cleaning: This is carried out after the reinforcement cage and the guide pipe are lowered and before concrete is poured to ensure that the thickness of the sediment at the bottom of the hole meets the specifications.
[0009] (III) Pile Formation Process Reinforcing cage fabrication and placement: The reinforcing cage is fabricated in the processing plant according to the design drawings, and then hoisted into the hole in sections by a crane. Welding or mechanical connection is then carried out at the hole opening to ensure verticality and accurate elevation.
[0010] Lowering guide tube: This is the key equipment for material feeding. The guide tube is a sealed pipe made up of multiple seamless steel pipes connected by quick couplings, extending from the orifice to a certain distance from the bottom of the orifice (usually 30-50cm).
[0011] Underwater concrete pouring (material delivery): This is the most critical step in pile formation, which will be explained in detail below.
[0012] Pile head treatment and testing: After the concrete is poured and its strength reaches the required level, the laitance layer at the top of the pile (pile head) is excavated and removed. Finally, the integrity of the pile body is tested (such as low strain method, sonic logging method, etc.).
[0013] In bored pile construction, "material guiding" specifically refers to underwater concrete pouring via a tremie pipe. Its core principle is to utilize the fact that concrete has a higher density than mud, allowing the concrete flowing from the bottom of the tremie pipe to push the mud upwards, forming a continuous pile body. The entire process must be continuous and rapid to prevent pile breakage.
[0014] The initial volume of concrete is a crucial step in the success of the material delivery! It must be accurate to ensure that the volume of concrete poured in the first instance is sufficient to embed the bottom of the guide pipe into the concrete at least 1.0 meter in one go.
[0015] This creates a sufficient pressure difference to ensure the smooth flow of subsequent concrete and effectively prevents slurry backflow.
[0016] The entire pouring process must be carried out continuously without interruption. The pause time must not exceed the initial setting time of the concrete.
[0017] At the same time, it is necessary to control the timing of pipe pulling, which requires frequent pipe disassembly. In actual construction, the following problems often occur in the material guiding process: pipe blockage, pipe jamming, inability to pull out the guide pipe, pile necking, or poor concrete diffusion, which greatly affect the material guiding. Summary of the Invention
[0018] The technical problem this invention aims to solve is that the current material guiding environment is prone to pipe blockage, pipe jamming, inability to pull out the guide tube, pile necking, or poor concrete diffusion, which greatly affects material guiding.
[0019] The technical solution adopted by the present invention to solve its technical problem is: a material guiding device for bored pile construction, including a material guiding hopper, the upper end of which has an integral structure top hanging ring, the lower end of which is fitted with a combined telescopic material guiding pipe on the outside of the discharge section, and an electrically controlled spiral scraping material guiding mechanism is movably assembled inside the upper opening of the material guiding hopper.
[0020] The guide hopper consists of an upper hopper, an inverted conical hopper fixed at the lower end of the upper hopper, and a vertical guide pipe axially fixed at the bottom end of the inverted conical hopper.
[0021] The combined telescopic guide tube includes a first extension tube fitted outside the vertical guide tube, a second extension tube slidably fitted outside the first extension tube, and a third extension tube slidably fitted outside the second extension tube.
[0022] The bottom of the outer wall of the vertical guide tube, the first extension tube, the second extension tube, and the third extension tube all have an outwardly protruding outer limiting drive ring, and an embedded worm gear adjustment assembly is installed inside the outer limiting drive ring.
[0023] The first, second, and third extension tubes have a plurality of longitudinally placed guide racks that cooperate with the embedded worm gear adjustment assembly on their inner arc-shaped surfaces, and the outer arc-shaped surface of the outer limiting drive ring has a lateral transmission groove.
[0024] The embedded worm gear adjustment assembly includes an annular adjustment motor installed inside the outer limit drive ring, an annular gear fixed on the annular rotor outside the annular adjustment motor, a control worm gear meshing with the annular gear through an end gear, a control worm wheel meshing with the control worm gear, and an annular tooth groove formed on one side of the control worm wheel.
[0025] The electrically controlled spiral scraping and guiding mechanism includes a side-mounted adjusting motor fixed on the outer side of the guide hopper, an inner adjusting ring slidably inserted into the inner arc-shaped surface of the guide hopper, an inner scraper fixed inside the inner side of the inner adjusting ring, a conical guide frame fixed to the inner end of the inner scraper, and spiral guiding blades fixed to the bottom end of the conical guide frame.
[0026] The upper inner sides of the first, second, and third extension tubes are bolted with top side limiting blocks that cooperate with the outer limiting drive ring.
[0027] The spiral guide blades are inserted into the inverted conical hopper and the vertical guide tube to guide the material evenly.
[0028] The bottom contact surface of the internal scraper is provided with a bottom telescopic groove, and a bottom extrusion spring is elastically fitted inside the lower opening of the bottom telescopic groove. An electric heating module is installed inside the bottom extrusion spring, and the lower end of the bottom extrusion spring has a bottom bending scraper.
[0029] The beneficial effects of this invention are: (1) The drilling and grouting pile construction material guiding device of the present invention adopts a combined telescopic material guiding pipe fitted on the outside of the material discharge section at the lower end of the material guiding hopper. It can be evenly lifted according to the material guiding process, and then stored and attached to the outside of the material discharge section at the lower end of the material guiding hopper. It does not require frequent lifting and disassembly of the pipe, saving construction time and ensuring the continuity of material guiding. (2) The combined telescopic guide tube is limited by the outer limit drive ring, and the electric lifting adjustment is carried out by the embedded worm gear adjustment component inside the outer limit drive ring. The whole operation process is simple and convenient. At the same time, the drive unit adopts a built-in design and has a long service life. (3) An electrically controlled spiral scraping and guiding mechanism is installed inside the upper opening of the guide hopper. It can be driven by an externally designed side-mounted adjusting motor, which can prevent the raw material from sticking to the inside of the upper hopper. At the same time, the spiral guide blades at the bottom can be used to evenly convey the internal raw material downwards, improving the guiding efficiency. (4) The combined telescopic guide pipe adopts a detachable structure design, which can be connected by sleeve or pipe as needed. The number of pipes can also be increased or decreased as needed to improve applicability. Attached Figure Description
[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0031] Figure 1 This is a schematic diagram of the structure of the present invention.
[0032] Figure 2 This is a schematic diagram of the internal structure of the feed hopper in this invention.
[0033] Figure 3 This is a schematic diagram of the internal structure of the outer limiting drive ring in this invention.
[0034] Figure 4 This is a schematic diagram of the structure of the bottom compression spring in a partial state in this invention.
[0035] In the diagram: 1. Guide hopper, 101. Upper hopper, 102. Inverted conical hopper, 103. Vertical guide tube, 2. Top hanging ring, 3. Combined telescopic guide tube, 31. First extension tube, 32. Second extension tube, 33. Third extension tube, 34. Outer limiting drive ring, 35. Top side limiting block, 4. Electrically controlled spiral scraping and guiding mechanism, 41. Side-mounted adjusting motor, 42. Inner adjusting ring, 43. Internal scraper plate, 44. Conical guide frame, 45. Spiral guide blade, 46. Bottom extrusion spring, 47. Electric heating module, 48. Bottom bending scraper, 5. Embedded worm gear adjusting assembly, 51. Ring adjusting motor, 52. Ring gear, 53. Control worm, 54. Control worm wheel, 55. Ring tooth groove, 6. Longitudinal guide rack. Detailed Implementation
[0036] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.
[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0038] Figure 1 , Figure 2 and Figure 3The drilling pile construction material guiding device shown includes a material guiding hopper 1, an integrated top hanging ring 2 at the upper end of the material guiding hopper 1, a combined telescopic material guiding pipe 3 fitted on the outer side of the material discharge section at the lower end of the material guiding hopper 1, and an electrically controlled spiral scraping material guiding mechanism 4 movably assembled inside the opening at the upper end of the material guiding hopper 1.
[0039] To facilitate the top material feeding, the guide hopper 1 consists of an upper hopper 101, an inverted conical hopper 102 fixed at the lower end of the upper hopper 101, and a vertical guide pipe 103 axially fixed at the bottom end of the inverted conical hopper 102.
[0040] People hang the material from the top ring 2 on the hoisting rope, place the guide hopper 1 in the designated guiding position, and then control the combined telescopic guide pipe 3 to extend downward. Then the hopper car guides the raw material into the upper opening of the guide hopper 1. At the same time, the electrically controlled spiral scraping guide mechanism 4 ensures that the raw material can be guided downward evenly.
[0041] To accommodate extension and contraction, the combined telescopic guide tube 3 includes a first extension tube 31 fitted outside the vertical guide tube 103, a second extension tube 32 slidably fitted outside the first extension tube 31, and a third extension tube 33 slidably fitted outside the second extension tube 32.
[0042] The combined telescopic guide tube 3 can be extended by the above-mentioned sliding method, or it can be extended without electrical control and connected by conventional assembly. In this case, the diameters of the first extension tube 31, the second extension tube 32, and the third extension tube 33 are the same as those of the vertical guide tube 103, which is suitable for use in scenarios where the internal space of the borehole is small.
[0043] In order to cooperate with external limiting and drive adjustment lifting, the bottom of the outer wall of the vertical guide tube 103, the first extension tube 31, the second extension tube 32 and the third extension tube 33 are all provided with an outwardly protruding outer limiting drive ring 34, and an embedded worm gear adjustment assembly 5 is installed inside the outer limiting drive ring 34.
[0044] To facilitate lifting and adjusting, a plurality of longitudinally placed guide racks 6 are provided on the inner arc-shaped surfaces of the first extension tube 31, the second extension tube 32, and the third extension tube 33, which cooperate with the embedded worm gear adjustment assembly 5. A lateral transmission groove is provided on the outer arc-shaped surface of the outer limiting drive ring 34.
[0045] To cooperate with the electric control drive, the embedded worm gear adjustment assembly 5 includes an annular adjustment motor 51 installed inside the outer limit drive ring 34, an annular gear 52 fixed on the annular rotor outside the annular adjustment motor 51, a control worm 53 meshing with the annular gear 52 through an end gear, a control worm wheel 54 meshing with the control worm 53, and an annular tooth groove 55 opened on one side of the control worm wheel 54.
[0046] The ring-shaped regulating motor 51 drives the ring gear 52 to rotate. The ring gear 52 drives the control worm 53 by driving the end gear. The control worm 53 then drives the control worm wheel 54 to rotate. The control worm wheel 54 then uses the ring tooth groove 55 to drive the longitudinal guide rack 6 to rise and fall along the lateral transmission groove, thereby controlling the independent rising and falling adjustment of the first extension tube 31, the second extension tube 32, and the third extension tube 33.
[0047] To facilitate the spiral material guiding, the electrically controlled spiral scraping and guiding mechanism 4 includes a side-mounted adjusting motor 41 fixed on the outer side of the guide hopper 1, an inner adjusting ring 42 slidably inserted into the inner arc-shaped surface of the guide hopper 1, an inner scraper plate 43 fixed inside the inner adjusting ring 42, a conical guide frame 44 fixed at the inner end of the inner scraper plate 43, and a spiral guiding blade 45 fixed at the bottom end of the conical guide frame 44.
[0048] The inner adjusting ring 42 has an annular toothed surface on its outer arc-shaped surface, and the outer surface of the guide hopper 1 has an arc-shaped transmission port for driving the side-mounted adjusting motor 41 and the inner adjusting ring 42. The spiral guide blade 45 includes a conical spiral section that cooperates with the inverted conical hopper 102 and a vertical spiral section that cooperates with the vertical guide tube 103.
[0049] To facilitate loading and unloading, the upper inner sides of the first extension tube 31, the second extension tube 32, and the third extension tube 33 are bolted with top side limiting blocks 35 that cooperate with the outer limiting drive ring 34.
[0050] The first extension tube 31 can be limited to the outside of the vertical guide tube 103 by the top side limiting block 35, the second extension tube 32 can be limited to the outside of the first extension tube 31, and the third extension tube 33 can be limited to the outside of the second extension tube 32.
[0051] To facilitate material feeding, the spiral guide blades 45 are inserted into the inverted conical hopper 102 and the vertical guide tube 103 to uniformly guide the material.
[0052] The side-mounted adjustment motor 41 engages with the annular tooth surface on the outer arc surface of the inner adjustment ring 42 via the adjustment gear on the adjustment shaft. By driving the adjustment gear to rotate, the inner adjustment ring 42 is rotated, thereby controlling the internal scraper 43 and the spiral guide blade 45 to rotate at a uniform speed.
[0053] The raw materials introduced into the feed hopper 1 can be evenly fed downwards, ensuring uniform pressure.
[0054] To improve scraping efficiency, a bottom telescopic groove is provided on the bottom contact surface of the internal scraper plate 43. A bottom extrusion spring 46 is elastically fitted inside the lower opening of the bottom telescopic groove. An electric heating module 47 is installed inside the bottom extrusion spring 46. A bottom bending scraper 48 is provided at the lower end of the bottom extrusion spring 46.
[0055] The bottom extrusion spring 46 can improve the fit between the internal scraper 43 and the bottom contact surface. Then, when the internal scraper 43 moves, the bottom bending scraper 48 assists in scraping the bottom, thereby improving the scraping effect. Then, the electric heating module 47 is used for electric heating to improve the raw material temperature and scraping efficiency.
[0056] Operating principle of the device 1. Lifting principle of combined telescopic guide tube Power source: The ring-shaped adjusting motor 51 in the embedded worm gear adjusting assembly 5 provides driving power.
[0057] Transmission path: The ring regulating motor 51 drives the ring gear 52 to rotate → the ring gear 52 drives the control worm 53 through the end gear → the control worm 53 meshes with the control worm wheel 54 → the control worm wheel 54 meshes with the longitudinal guide rack 6 through the ring tooth groove 55 → driving the first extension tube 31, the second extension tube 32, and the third extension tube 33 to rise and fall independently.
[0058] Limiting protection: The top side limiting block 35 cooperates with the outer side limiting drive ring 34 to prevent the extension tubes from detaching and ensure stability during the expansion and contraction process.
[0059] 2. Principle of Electrically Controlled Spiral Scraper Material Guiding Drive method: The side-mounted adjustment motor 41 drives the inner adjustment ring 42 to rotate through the meshing structure of "adjustment gear + outer ring tooth surface of inner adjustment ring 42".
[0060] Dual function: The inner adjusting ring 42 synchronously drives the internal scraper 43 and the spiral guide blade 45 to rotate; the internal scraper 43, through the elastic pressure of the bottom squeezing spring 46, makes the bottom bent scraper 48 fit against the inner wall of the guide hopper 1 to avoid the material sticking, while the electric heating module 47 can improve the flowability of the material; the spiral guide blade 45 (including the conical spiral section + the vertical spiral section) evenly conveys the material to the vertical guide tube 103 to ensure stable guide pressure.
[0061] 3. Anti-clogging pipe auxiliary principle The continuous conveying of the spiral guide blades 45 can prevent the raw materials from accumulating in the inverted conical hopper 102 and the vertical guide tube 103; the electric heating module 47 heats the easily solidified raw materials, reducing their viscosity and reducing the risk of pipe blockage.
[0062] Device operation process 1. Pre-construction preparation: hoisting and positioning The material guiding device is hoisted to the designated material guiding position of the bored pile using a crane via the top hanging ring 2, ensuring that the center of the material guiding hopper 1 is aligned with the center of the pile hole.
[0063] Check the initial state of the combined telescopic guide tube 3 (default retracted, fitting the outside of the vertical guide tube 103) and confirm that the embedded worm gear adjustment assembly 5 and the side-mounted adjustment motor 41 are powered normally.
[0064] 2. Pre-feeding adjustment: Extension of the telescopic tube Start the embedded worm gear adjustment assembly 5, and control the first extension tube 31, the second extension tube 32, and the third extension tube 33 to extend downward in sequence according to the construction requirements, so that the bottom end of the combined telescopic guide tube 3 is 30-50cm away from the bottom of the hole (in accordance with the specifications). After stopping the extension, lock the position of each extension tube.
[0065] 3. Core Process: Raw Material Introduction and Feeding The hopper truck pours concrete raw materials into the upper hopper 101, and at the same time starts the side-mounted regulating motor 41, which drives the internal scraper 43 and spiral guide blades 45 to rotate.
[0066] After the raw material is scraped off from the inner wall by the internal scraper 43, it is evenly transported to the vertical guide tube 103 by the spiral guide blade 45, and then injected into the pile hole through the combined telescopic guide tube 3. During the process, the electric heating module 47 can be turned on and off to adapt to the material guiding needs of raw materials with different viscosities.
[0067] 4. Adjustment during material feeding: Dynamic lifting of the telescopic tube As the concrete level inside the pile hole rises, the combined telescopic guide pipe 3 is gradually controlled to retract upwards through the embedded worm gear adjustment component 5 (single or multiple pipes can be adjusted synchronously), always keeping its bottom end buried more than 1.0m into the concrete surface (meeting the requirements for the first batch of concrete pipe embedding and preventing mud backflow), without the need for frequent pipe disassembly, ensuring the continuity of material delivery.
[0068] 5. Post-construction storage: Repositioning of the equipment. After the concrete pouring is completed, first turn off the side-mounted adjusting motor 41, then start the embedded worm gear adjusting assembly 5 to control the third extension tube 33, the second extension tube 32, and the first extension tube 31 to retract upwards in sequence, returning to the initial fitting state. Finally, use the top hanging ring 2 to lift the device away from the construction area, completing one material guiding operation. Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A material guiding device for bored pile construction, comprising a material guiding hopper (1), characterized in that: The upper end of the guide hopper (1) has an integrated top hanging ring (2), the lower end of the guide hopper (1) is fitted with a combined telescopic guide pipe (3) on the outside, and the upper end of the guide hopper (1) is equipped with an electrically controlled spiral scraping guide mechanism (4).
2. The material guiding device for bored pile construction according to claim 1, characterized in that: The guide hopper (1) consists of an upper hopper (101), an inverted conical hopper (102) fixed at the lower end of the upper hopper (101), and a vertical guide pipe (103) axially fixed at the bottom end of the inverted conical hopper (102).
3. The material guiding device for bored pile construction according to claim 2, characterized in that: The combined telescopic guide tube (3) includes a first extension tube (31) fitted on the outside of the vertical guide tube (103), a second extension tube (32) slidably fitted on the outside of the first extension tube (31), and a third extension tube (33) slidably fitted on the outside of the second extension tube (32).
4. The material guiding device for bored pile construction according to claim 3, characterized in that: The bottom of the outer wall of the vertical guide tube (103), the first extension tube (31), the second extension tube (32) and the third extension tube (33) are all provided with an outwardly protruding outer limit drive ring (34), and an embedded worm gear adjustment assembly (5) is installed inside the outer limit drive ring (34).
5. The material guiding device for bored pile construction according to claim 4, characterized in that: The inner arc surface of the first extension tube (31), the second extension tube (32) and the third extension tube (33) is provided with a plurality of longitudinally placed guide racks (6) that cooperate with the embedded worm gear adjustment assembly (5), and the outer arc surface of the outer limiting drive ring (34) is provided with a lateral transmission groove.
6. The material guiding device for bored pile construction according to claim 5, characterized in that: The embedded worm gear adjustment assembly (5) includes an annular adjustment motor (51) installed inside the outer limit drive ring (34), an annular gear (52) fixed on the annular rotor outside the annular adjustment motor (51), a control worm (53) meshing with the annular gear (52) through an end gear, a control worm wheel (54) meshing with the control worm (53), and an annular tooth groove (55) opened on one side of the control worm wheel (54).
7. The material guiding device for bored pile construction according to claim 1, characterized in that: The electrically controlled spiral scraping and guiding mechanism (4) includes a side-mounted adjusting motor (41) fixed on the outer side of the guide hopper (1), an inner adjusting ring (42) slidably inserted into the inner arc surface of the guide hopper (1), an inner scraper plate (43) fixed inside the inner side of the inner adjusting ring (42), a conical guide frame (44) fixed at the inner end of the inner scraper plate (43), and a spiral guiding blade (45) fixed at the bottom end of the conical guide frame (44).
8. The material guiding device for bored pile construction according to claim 5, characterized in that: The upper end of the inner side of the first extension tube (31), the second extension tube (32) and the third extension tube (33) is bolted with a top side limiting block (35) that cooperates with the outer limiting drive ring (34).
9. The material guiding device for bored pile construction according to claim 7, characterized in that: The spiral guide blades (45) are inserted into the inverted conical bucket (102) and the vertical guide tube (103) to guide the material evenly.
10. The material guiding device for bored pile construction according to claim 7, characterized in that: The bottom contact surface of the internal scraper (43) is provided with a bottom telescopic groove. The bottom extrusion spring (46) is elastically assembled inside the lower opening of the bottom telescopic groove. An electric heating module (47) is installed inside the bottom extrusion spring (46). The lower end of the bottom extrusion spring (46) has a bottom bending scraper (48).