A device for preventing jamming of a drill hole cast-in-place pile guide pipe
By combining the design of the platform and the positioning mechanism, the problem of the limited applicability of traditional duct positioning devices has been solved, enabling the centering and positioning of ducts of different specifications, thus saving material and construction costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENGZHOU ENG CO LTD CHINA RAILWAY SEVENTH GRP
- Filing Date
- 2025-08-13
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional catheter positioning devices have limited applicability and cannot simultaneously accommodate catheters of different sizes, leading to increased replacement costs.
An anti-jamming device was designed, comprising a platform, a column, an upper ring frame, a positioning arm, and a lower ring frame. By adjusting the swing angle of the positioning arm and the height of the lower ring frame, the device can achieve centering and positioning of conduits of different diameters.
It achieves applicability to conduits of different specifications, reduces material consumption and construction costs, and improves the effectiveness of use.
Smart Images
Figure CN224531680U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of cast-in-place pile construction technology, and in particular to a device for preventing jamming of the guide pipe for bored cast-in-place piles. Background Technology
[0002] A cast-in-place pile is a type of pile made by drilling a hole in place and then pouring in concrete or reinforced concrete. It is mainly constructed on-site by mechanical drilling (such as rotary drilling or impact drilling) or manual excavation to form a pile hole, followed by installing a reinforcing cage in the hole and pouring in concrete to form a pile foundation.
[0003] During the construction of cast-in-place piles, concrete grouting is carried out through a guide pipe. During this process, the guide pipe needs to be lowered into the reinforcement cage. As the guide pipe moves down, it is easy for it to come into contact with and scrape the inner wall of the reinforcement cage. In some cases, the guide pipe may even get stuck midway down, preventing it from reaching the designated position and affecting normal grouting. Therefore, a simple anti-jamming device, namely a positioning device, is usually used on site to keep the guide pipe in the center of the reinforcement cage during the lowering process to ensure that it accurately reaches the designated position.
[0004] Currently, although traditional positioning devices for duct centering are simple in structure, their applicability is relatively limited. They can only center ducts of the same specification. However, the diameter of the ducts used in different engineering scenarios and needs is also different. When faced with ducts of smaller or larger diameters, a new positioning device that matches them must be replaced, which not only consumes materials but also increases the construction cost of cast-in-place piles.
[0005] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Utility Model Content
[0006] The purpose of this application is to provide a device for preventing jamming of the guide pipe in bored piles, so as to solve or alleviate the problem that traditional positioning devices used for centering guide pipes have limited applicability and cannot be adapted to guide pipes of different sizes at the same time.
[0007] To achieve the above objectives, this application provides the following technical solution: This application provides a device for preventing jamming of the guide pipe in bored piles, comprising: a platform located above the pile hole, with a guide pipe through hole in the center of the platform, and multiple columns evenly distributed around the guide pipe through hole on the platform; a positioning mechanism comprising: an upper ring frame, a positioning arm, and a lower ring frame, the upper ring frame being mounted on the top of the columns, one end of the positioning arm being hinged to the bottom of the upper ring frame, and the hinge position of the positioning arm being offset from the column, the other end of the positioning arm extending downward and swinging toward the center of the guide pipe through hole, multiple positioning arms being evenly distributed along the upper ring frame to form a positioning opening, the lower ring frame being located directly below the upper ring frame, and the lower ring frame being able to move up and down along the axial direction of the column, the swing angle of all the positioning arms can be adjusted simultaneously by the up and down movement of the lower ring frame, thereby changing the size of the positioning opening according to the guide pipe of different diameters.
[0008] Preferably, the platform is supported by legs on all four sides of its bottom, and the platform surface is mesh-like.
[0009] Preferably, the bottom of the column has a mounting plate extending radially.
[0010] Preferably, the column has a groove at the center of its top; The width of the groove is adapted to the thickness of the upper ring frame so that the ring body of the upper ring frame is placed in the groove and the upper ring frame is fixed to the column by fasteners.
[0011] Preferably, the column is provided with external threads, and a support sleeve is fitted onto the external threads of the column.
[0012] Preferably, the ring body of the lower ring frame is slidably fitted onto the outside of the column; The support sleeve is located below the lower ring frame.
[0013] Preferably, the inner side of the lower ring frame has a transverse support arm extending radially corresponding to the positioning arm.
[0014] Preferably, the horizontal support arm is composed of a pair of spaced-apart horizontal bars, and the ends of the two horizontal bars are connected as one unit by a shaft. The surface of the positioning arm is provided with sliding holes.
[0015] Preferably, the two crossbars constituting the cross arm are disposed opposite to each other on both sides of the positioning arm, and the shaft passes through the sliding hole; The diameter of the shaft is the same as the width of the sliding hole, and the swing angle of the positioning arm can be adjusted by the vertical displacement of the shaft.
[0016] Preferably, the swing end of the positioning arm is provided with a hook on the side facing the center of the conduit through-hole.
[0017] Compared with the closest prior art, the technical solution of this application has the following beneficial effects: This application can center and position conduits of different sizes and specifications, has a wide range of applications, can effectively reduce material consumption and save on the construction cost of cast-in-place piles, has strong practicality and good performance. Attached Figure Description
[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein: Figure 1 This is a schematic diagram illustrating the practical application of this application; Figure 2 This is a schematic diagram of the overall structure of this application; Figure 3 This is an overall schematic diagram of the column structure of this application; Figure 4 This is an overall schematic diagram of the positioning arm structure of this application; Figure 5 This is a schematic diagram of the overall structure of the lower ring frame in this application.
[0019] In the diagram: 1. Platform; 2. Guide pipe through hole; 3. Column; 4. Upper ring frame; 5. Positioning arm; 6. Lower ring frame; 7. Support leg; 8. Mounting plate; 9. Slot platform; 10. Support sleeve; 11. Crossbar; 12. Shaft; 13. Sliding hole; 14. Hook. Detailed Implementation
[0020] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present application without departing from the scope or spirit thereof. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present application encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.
[0021] In the following description, the terms "first / second / third" are used merely to distinguish similar objects and do not represent a specific order of objects. It is understood that "first / second / third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.
[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing embodiments of this disclosure only and is not intended to limit this disclosure.
[0023] In the description of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and do not require that this application be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The terms "connected," "linked," and "set up" used in this application should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; direct connections or indirect connections through intermediate components; wired connections, radio connections, or wireless communication signal connections. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0024] This embodiment aims to provide a device for preventing jamming of guide pipes in bored piles. Its main function is to center and position guide pipes of different specifications during the construction of bored piles. It has a wide range of applications and saves materials and construction costs.
[0025] Reference Figure 1 and Figure 2 The system includes: a platform 1 and a positioning mechanism. The platform 1 is located directly above the pile hole. A guide pipe through hole 2 is provided in the center of the platform. Specifically, four support legs 7 are vertically welded around the bottom of the platform 1 so that the height of the platform 1 exceeds that of the casing and the reinforcing cage. The platform surface of the platform 1 is mesh-like. The entire platform 1 is made of steel and can be constructed by welding rectangular steel pipes or other materials to prevent concrete slurry falling onto the platform 1 from accumulating. A ring-shaped component is welded separately in the center of the platform surface to form the guide pipe through hole 2. Four columns 3 are evenly distributed around the guide pipe through hole 2 on the platform 1. The bottom of the column 3 has a mounting plate 8 extending radially. The mounting plate 8 increases the contact area between the bottom of the column 3 and the platform surface of the platform 1 so that the mounting plate 8 can be fixed to the platform surface of the platform 1 by bolts.
[0026] Reference Figures 1-3The positioning mechanism includes an upper ring frame 4, a positioning arm 5, and a lower ring frame 6. The upper ring frame 4 is located on the top of the column 3. A U-shaped groove 9 is provided in the center of the top of the column 3. The width of the groove 9 is adapted to the thickness of the upper ring frame 4 so that the ring body of the upper ring frame 4 can be placed in the groove 9 on the top of the four columns 3 at the same time. The upper ring frame 4 is fixed to the column 3 by fasteners, which are bolts. One end of the positioning arm 5 is hinged to the bottom of the upper ring frame 4. The bottom of the upper ring frame 4 is provided with a pair of hinge ears corresponding to the positioning arm 5. One end of the positioning arm 5, i.e., the upper end, is inserted between the two hinge ears and connected together by a pin or bolt, so that the other end of the positioning arm 5, i.e., the lower end, can swing toward the center of the guide hole 2. The hinge end of the positioning arm 5 must be offset from the column 3 to avoid mutual interference.
[0027] Reference Figures 1-4 The swing end of the positioning arm 5 extends downward and swings at a certain angle toward the center of the guide tube through hole 2. Six positioning arms 5 are evenly distributed along the upper ring frame 4. The swing ends of the six positioning arms 5 form a positioning port, through which the guide tube can be centered. The lower ring frame 6 is located directly below the upper ring frame 4, and the lower ring frame 6 can move up and down along the axis of the column 3. By moving the lower ring frame 6 up and down, the swing angle of all positioning arms 5 can be adjusted at the same time, thereby changing the size of the positioning port according to the guide tubes of different diameters. Specifically, the column 3 is provided with external threads, and a support sleeve 10 is fitted on the external threads of the column 3. The ring body of the lower ring frame 6 is slidably fitted on the outside of the column 3. The support sleeve 10 is located below the lower ring frame 6 to support the lower ring frame 6. Rotating the support sleeve 10 can make it move up and down along the column 3, thereby adjusting the height of the lower ring frame 6.
[0028] Reference Figures 2-5 The inner side of the lower ring frame 6 has a horizontal support arm extending radially corresponding to the positioning arm 5. The horizontal support arm is composed of a pair of spaced horizontal bars 11. The ends of the two horizontal bars 11 are welded and fixed to the inner side of the lower ring frame 6. The ends of the two horizontal bars 11 are connected as one unit by a shaft 12. The surface of the positioning arm 5 is provided with a sliding hole 13. The sliding hole 13 extends along the length direction of the positioning arm 5. The two horizontal bars 11 that constitute the horizontal support arm are arranged opposite to each other on both sides of the positioning arm 5, and the shaft 12 passes through the sliding hole 13. The diameter of the shaft 12 is the same as the width of the sliding hole 13. When the shaft 12 moves up and down with the lower ring frame 6, it can adjust the swing angle of the positioning arm 5. The greater the swing amplitude of the positioning arm 5 toward the center of the guide tube through hole 2, the smaller the positioning opening and the larger the positioning opening.
[0029] In this embodiment, a hook 14 is welded to the side of the swing end of the positioning arm 5 facing the center of the conduit through hole 2. The hook 14 is mainly used to temporarily prevent the conduit located in the steel cage from falling, so as to connect the subsequently lowered conduit with the conduit in the steel cage. In reality, the diameter of the connecting end of the conduit is usually thicker than its body diameter. Therefore, the hook 14 can effectively prevent the conduit from falling, which greatly facilitates the connection between the ends of the conduits.
[0030] When lowering the guide pipe into the reinforcing cage, first hoist the guide pipe into the guide pipe through hole 2. The workers then raise the lower ring frame 6. During this process, the lower ends of the six positioning arms 5 will swing toward the guide pipe until they touch it, thus determining the size of the positioning opening and the position of the lower ring frame 6. Rotate the support sleeve 10 to move it upward, so that the support sleeve 10 can resume supporting the lower ring frame 6. Then, lower the guide pipes one by one. During the lowering process, the horizontal height of the lower ring frame 6 can be flexibly adjusted as needed to change the size of the positioning opening.
[0031] The conduit anti-jamming device provided in this embodiment can center and position conduits of different sizes and specifications. It has a wide range of applications, can effectively reduce material consumption and save on the construction cost of cast-in-place piles, and is highly practical with good performance.
[0032] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A device for preventing jamming of a guide pipe in bored piles, characterized in that, include: The platform is located above the pile hole. A guide pipe hole is provided in the center of the platform, and multiple columns are evenly distributed around the guide pipe hole on the platform. The positioning mechanism includes an upper ring frame, a positioning arm, and a lower ring frame. The upper ring frame is mounted on the top of the column. One end of the positioning arm is hinged to the bottom of the upper ring frame, and the hinge position of the positioning arm is offset from the column. The other end of the positioning arm extends downward and swings toward the center of the conduit through-hole. Multiple positioning arms are evenly distributed along the upper ring frame to form a positioning port. The lower ring frame is located directly below the upper ring frame and can move up and down along the axial direction of the column. The swing angle of all the positioning arms can be adjusted simultaneously by the up and down movement of the lower ring frame, thereby changing the size of the positioning port according to the conduit with different diameters.
2. The anti-jamming device for bored pile guide pipes according to claim 1, characterized in that, The platform is supported by legs on all four sides of its bottom, and the platform surface is mesh-like.
3. The anti-jamming device for bored pile guide pipes according to claim 1, characterized in that, The bottom of the column has a mounting plate extending radially.
4. The anti-jamming device for bored pile guide pipes according to claim 1, characterized in that, The top center of the column is provided with a groove platform; The width of the groove is adapted to the thickness of the upper ring frame so that the ring body of the upper ring frame is placed in the groove and the upper ring frame is fixed to the column by fasteners.
5. The anti-jamming device for bored pile guide pipes according to claim 1, characterized in that, The column is provided with external threads, and a support sleeve is fitted onto the external threads of the column.
6. The anti-jamming device for bored pile guide pipes according to claim 5, characterized in that, The ring body of the lower ring frame is slidably fitted onto the outside of the column; The support sleeve is located below the lower ring frame.
7. The anti-jamming device for bored pile guide pipes according to claim 1, characterized in that, The inner side of the lower ring frame has a transverse support arm extending radially corresponding to the positioning arm.
8. The anti-jamming device for bored pile guide pipes according to claim 7, characterized in that, The horizontal support arm is composed of a pair of spaced-apart horizontal bars, and the ends of the two horizontal bars are connected as one unit by a shaft. The surface of the positioning arm is provided with sliding holes.
9. The anti-jamming device for bored pile guide pipes according to claim 8, characterized in that, The two crossbars constituting the horizontal support arm are positioned opposite each other on both sides of the positioning arm, and the shaft passes through the sliding hole; The diameter of the shaft is the same as the width of the sliding hole, and the swing angle of the positioning arm can be adjusted by the vertical displacement of the shaft.
10. The anti-jamming device for bored pile guide pipes according to claim 1, characterized in that, The swing end of the positioning arm is provided with a hook on one side facing the center of the conduit through hole.