Prefabricated pipe pile using gear to rotate bolt

Abstract

The utility model discloses a prefabricated pipe pile using a gear to rotate a bolt, which mainly comprises an upper prefabricated pipe pile mechanism, a lower prefabricated pipe pile mechanism and a connecting mechanism, and the upper prefabricated pipe pile mechanism comprises an upper prefabricated pipe pile and a sleeve nut arranged in the upper prefabricated pipe pile; the lower prefabricated pipe pile mechanism comprises a lower prefabricated pipe pile and a sleeve nut arranged in the lower prefabricated pipe pile; the connecting mechanism comprises a connecting piece, and the connecting piece comprises a planetary gear bolt, an inner gear ring and an outer gear ring; the steel plate comprises an upper end steel plate and a support steel plate, bolt holes are formed in the steel plate, and planetary gear bolts penetrate through the bolt holes to be connected with the upper end steel plate and are arranged on the upper side; planetary gear bolts penetrate through the bolt holes to be connected with the support steel plate and arranged on the lower side. And the rotating handles are arranged on the two sides of the connecting piece, the upper prefabricated pipe pile and the lower prefabricated pipe pile rotate the connecting piece through the rotating handles, and the planetary gear bolts are screwed into the sleeve nuts for connection. The connector is mechanically connected, so that the connector is high in quality, quick in construction and convenient to operate.

Description

Technical Field

[0001] The utility model relates to a building foundation component and discloses a prefabricated pipe pile which utilizes a gear to rotate a bolt. Background Art

[0002] Prestressed pipe pile connection is a common technology in foundation engineering, which can improve the bearing capacity and stability of the foundation. At present, the most widely used and mature pile connection method is the end plate welding method. The welding connection has high strength, stability and reliability, but quality accidents often occur during construction due to poor welding quality of pipe pile joints, rough welding, insufficient cooling time to form joint quenching, etc., so there is an urgent need to research and develop non-welded joints. Utility Model Content

[0003] The purpose of the utility model is to provide a prefabricated pipe pile that uses gears to rotate bolts to solve the above-mentioned problems existing in the prior art.

[0004] Technical solution: A prefabricated pipe pile that uses gears to rotate bolts, comprising:

[0005] An upper prefabricated pipe pile mechanism, the upper prefabricated pipe pile mechanism comprising an upper prefabricated pipe pile and a sleeve nut placed in the upper prefabricated pipe pile;

[0006] A lower prefabricated pipe pile mechanism, the lower prefabricated pipe pile mechanism comprising a lower prefabricated pipe pile and a sleeve nut placed in the lower prefabricated pipe pile;

[0007] A connecting mechanism, the connecting mechanism comprising:

[0008] A connecting member, the connecting member comprising a predetermined number of planetary gear bolts arranged in a circle, an inner gear ring arranged inside the planetary gear bolts, and an outer gear ring arranged outside the planetary gear bolts;

[0009] Steel plates, the steel plates comprising an upper steel plate and a bracket steel plate, the upper steel plate and the bracket steel plate are provided with bolt holes, the planetary gear bolts pass through the bolt holes to connect with the upper steel plate and are placed on the upper side; the planetary gear bolts pass through the bolt holes to connect with the bracket steel plate and are placed on the lower side;

[0010] The rotating handles are arranged on both sides of the connecting piece. The upper and lower prefabricated pipe piles rotate the connecting piece by rotating the rotating handles, and the planetary gear bolts are screwed into the sleeve nuts for connection.

[0011] According to one aspect of the present application, the sleeve nuts are arranged equidistantly in the upper and lower prefabricated pipe piles, the planetary gear bolts are located between the outer gear ring and the inner gear ring, and the positions of the planetary gear bolts and the sleeve nuts correspond one to one.

[0012] According to one aspect of the present application, the upper side of the gear of the planetary gear bolt is a positive thread, and the lower side is a negative thread;

[0013] The sleeve nut embedded in the upper prefabricated pipe pile is a positive thread, and the sleeve nut embedded in the lower prefabricated pipe pile is a reverse thread;

[0014] The positive thread end of the planetary gear bolt is connected with the positive thread sleeve nut in the upper prefabricated pipe pile, and the negative thread end of the planetary gear bolt is connected with the negative thread sleeve nut in the lower prefabricated pipe pile.

[0015] According to one aspect of the present application, a guide positioning section is provided in the sleeve nut, and there is no thread within the range of the guide positioning section.

[0016] According to one aspect of the present application, a longitudinal through-length rib is provided at the bottom of the sleeve nut, a pier head is provided at the end of the longitudinal through-length rib, the longitudinal through-length rib passes through the sleeve nut and is buried in the upper and lower prefabricated pipe piles, and is anchored by the pier head.

[0017] According to one aspect of the present application, the rotating handle is detachable, a notch is formed on the outer gear ring, and the cross-sectional area of ​​the rotating handle is consistent with the shape of the notch.

[0018] According to one aspect of the present application, a spring washer is provided in the sleeve nut.

[0019] According to one aspect of the present application, the steel plates are all hollow circle structures, and the diameter of the hollow circle is the same as the diameter of the inner hollow circle of the internal gear ring.

[0020] According to one aspect of the present application, the internal structure of the sleeve nut is wedge-shaped.

[0021] According to one aspect of the present application, the outer surface of the sleeve nut is provided with threads.

[0022] Beneficial effects: The utility model realizes rapid pile connection and shortens the construction period through mechanical connection joints; when connecting on site, it is only necessary to rotate the outer gear ring to drive the planetary gear bolt to rotate to complete the connection, and the operation is convenient and simple; at the same time, the planetary gear bolt connection can provide higher lateral stiffness and stability, ensuring the high quality of the joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front schematic diagram of the utility model.

[0024] Figure 2 It is a partial enlarged view of the sleeve nut in the utility model.

[0025] Figure 3 It is a three-dimensional schematic diagram of the planetary gear bolt in the utility model.

[0026] Figure 4 It is a three-dimensional schematic diagram of the connecting piece in the utility model.

[0027] Figure 5 It is a plan view of the steel plate in the utility model.

[0028] Figure 6 It is a three-dimensional schematic diagram of the connecting piece and the steel plate in the utility model.

[0029] In the figure: 1. lower prefabricated pipe pile; 2. upper prefabricated pipe pile; 3. connecting piece; 301. inner gear ring; 302. planetary gear bolt; 303. outer gear ring; 4. steel plate; 401. bracket steel plate; 402. upper end steel plate; 403. bolt hole; 5. sleeve nut; 6. longitudinal through-length rib; 7. rotating handle. DETAILED DESCRIPTION

[0030] like Figures 1 to 6 As shown, a prefabricated pipe pile that uses gears to rotate bolts includes an upper prefabricated pipe pile mechanism, a lower prefabricated pipe pile mechanism and a connecting mechanism. The upper prefabricated pipe pile mechanism includes an upper prefabricated pipe pile and a sleeve nut placed in the upper prefabricated pipe pile; the lower prefabricated pipe pile mechanism includes a lower prefabricated pipe pile and a sleeve nut placed in the lower prefabricated pipe pile; the connecting mechanism includes a connecting piece, a steel plate and a rotating handle; the connecting piece includes an inner gear ring, a plurality of planetary gear bolts and an outer gear ring, the plurality of planetary gear bolts are arranged in a circle, the inner gear ring is placed on the inner side of the plurality of planetary gear bolts, and the outer gear ring is placed on the outer side of the planetary gear bolts; the steel plate includes an upper end steel plate and a bracket steel plate, both of which are provided with a plurality of bolt holes, the planetary gear bolts are connected to the upper end steel plate through the bolt holes and are placed on the upper side; the planetary gear bolts are connected to the bracket steel plate through the bolt holes and are placed on the lower side; the rotating handles are arranged on both sides of the connecting piece, and the upper and lower prefabricated pipe piles rotate the connecting piece by rotating the rotating handles, and the planetary gear bolts are screwed into the sleeve nuts for connection.

[0031] Compared with the 30 minutes required for welding to complete each joint plus the cooling time required by the specification, the connection method in this embodiment only takes 5 to 10 minutes, which greatly improves the speed of pile connection, greatly shortens the construction period, and does not need to consider the influence of construction weather, saving time and cost; the use of several planetary gear bolts can not only provide higher lateral stiffness and stability, ensure the strength of the joint, but also ensure the uniform distribution of the connection force, and reduce the risk of damage or deformation of the pipe pile due to uneven force; when connecting on site, only the outer gear ring needs to be rotated to drive the planetary gear bolt to rotate, and the connection can be completed. The operation is convenient and simple. In addition, the connector consists of an inner and outer gear ring and several planetary gear bolts, which can be assembled and disassembled, and is easy to carry and transport; the reversibility of this connection method also provides convenience for future maintenance and disassembly. If the pipe pile needs to be replaced or repaired, the construction personnel can simply rotate the handle in the opposite direction to remove the planetary gear bolt from the sleeve nut, so that the pipe pile can be easily disassembled. The modular characteristics of the utility model make it widely used in various engineering projects, including but not limited to subway stations, underground parking lots, deep foundation pit support, etc.

[0032] According to another aspect of the present application, the sleeve nuts are arranged in equal intervals in the upper and lower prefabricated pipe piles, the planetary gear bolts are located between the outer gear ring and the inner gear ring, and the positions of the planetary gear bolts and the sleeve nuts correspond one to one. In this way, the connection of the pipe piles can be completed quickly and accurately, greatly shortening the construction time.

[0033] According to another aspect of the present application, the upper side of the gear of the planetary gear bolt is a positive thread, and the lower side is a negative thread; the sleeve nut embedded in the upper prefabricated pipe pile is a positive thread, and the sleeve nut embedded in the lower prefabricated pipe pile is a negative thread; the positive thread end of the planetary gear bolt is connected to the positive thread sleeve nut in the upper prefabricated pipe pile, and the negative thread end of the planetary gear bolt is connected to the negative thread sleeve nut in the lower prefabricated pipe pile.

[0034] In this embodiment, since the two ends of the planetary gear bolt are respectively positive thread and negative thread, they can be screwed into the sleeve nuts in the upper and lower pipe piles at the same time, thereby realizing quick connection. The design of positive thread and negative thread makes the connection more firm, avoids loosening when stressed, and ensures the safety of the building.

[0035] According to another aspect of the present application, a guide positioning section is provided in the sleeve nut, and the guide positioning section does not contain threads, but is a smooth, non-threaded area. When in use, the positive thread end of the planetary gear bolt is inserted into the positive thread sleeve nut in the upper prefabricated pipe pile, and the planetary gear bolt is rotated clockwise by rotating the handle until it is aligned with the guide positioning section. At this time, the planetary gear bolt should be able to smoothly enter the guide positioning section without excessive force.

[0036] The present embodiment facilitates the connection between the planetary gear bolt and the sleeve nut through the design of the guide positioning section, so that the planetary gear bolt can be more accurately aligned with the sleeve nut, reducing the deviation during connection; at the same time, the guide positioning section ensures the stability of the connection and avoids thread misalignment or loosening. Due to the precise alignment, the operator can complete the connection faster, thereby improving the construction efficiency.

[0037] According to another aspect of the present application, a hole is drilled at the bottom of the sleeve nut, and the diameter of the hole should be slightly larger than the diameter of the longitudinal through-length reinforcement to facilitate insertion. A pier head is provided at the end of the longitudinal through-length reinforcement, which passes through the sleeve nut and is buried in the upper and lower prefabricated pipe piles, and is anchored by the bottom steel bar pier head.

[0038] This embodiment can significantly improve the connection strength between the upper and lower prefabricated pipe piles by anchoring the bottom steel bar pier head, effectively bear the longitudinal and lateral loads, and enhance the stability of the structure; through the combination of the pier head and concrete, the loose connection caused by vibration or temperature changes is reduced, the service life of the prefabricated pipe pile connection is extended, and the maintenance cost is reduced.

[0039] According to another aspect of the present application, the rotating handle is a detachable bidirectional rotating handle, and a notch is formed on the outer gear ring, and the shape of the notch can be square, V-shaped or U-shaped. The cross-sectional area of ​​the rotating handle is consistent with the shape of the notch, and they are perfectly matched to ensure a tight fit during rotation. The connection can be completed by rotating the outer gear ring with the rotating handle to drive the planetary gear bolt to rotate and screw into the sleeve nut, and the construction operation is convenient.

[0040] In this embodiment, the connection is more stable through the close fit between the notch and the rotating handle, which prevents the rotating handle from loosening or falling off during operation, thereby ensuring the reliability of the connection. After the pile connection is completed, the rotating handle is disassembled, and the entire structure is not exposed, so the joint has strong corrosion resistance and good durability. The length of the planetary gear bolt screwed into the sleeve is preferably 8 to 10 cm, which can be used for a long time in harsh environments.

[0041] According to another aspect of the present application, a spring washer is provided in the sleeve nut. One of the main functions of the spring washer is to prevent the sleeve nut from loosening by itself after vibration, impact or long-term use. When the sleeve nut is subjected to external forces, the spring washer will produce elastic deformation to keep the sleeve nut in a tightened state. This is very important for prefabricated pipe pile connections, because in underground environments, the pipe piles may be affected by earthquakes, water flows or other external forces. The spring washer can help evenly distribute the pressure applied by the nut. When the nut is tightened, the spring washer forms a buffer layer between the nut and the connector, which helps to reduce local stress concentration and prevent deformation or damage to the nut and the connector. In addition, the connection of prefabricated pipe piles is usually carried out on a surface that is not completely flat. The spring washer can adapt to the irregular surface, fill the gap between the surfaces, and ensure close contact between the nut and the connector. This is crucial to ensure the stability and sealing of the connection. The spring washer is made of stainless steel or other corrosion-resistant materials, which can prevent the nut and the connector from being corroded in a humid and corrosive environment.

[0042] According to another aspect of the present application, the steel plates are all hollow circle structures, and the diameter of the hollow circle is the same as the diameter of the inner hollow circle of the internal gear ring.

[0043] In this embodiment, on the one hand, the two steel plates can disperse the impact force during piling and prevent the bolts from loosening; on the other hand, the bracket steel plate can support the planetary gear bolts and play a positioning role; at the same time, since the diameter of the hollow circle is the same as the inner hollow circle diameter of the inner gear ring, the pressure between the bolts and the nuts is evenly distributed, which helps to prevent local stress concentration and improve the stability of the connection.

[0044] The connection method in this embodiment is applicable to the connection of prefabricated pipe piles, and its scope of application can also be expanded. The connection method in this embodiment can also be considered for the connection of solid square piles, round piles, pipes and other structural components. If connecting solid piles, it is recommended that no hole is opened in the center of the steel plate, so that the impact load can be better shared and transmitted, and a uniform support surface can be provided.

[0045] According to another aspect of the present application, the internal structure of the sleeve nut is wedge-shaped. The wedge-shaped structure can produce a self-locking effect when the bolt is screwed in. When the bolt enters the sleeve nut, the wedge-shaped structure will tightly grasp the bolt due to friction to prevent it from rotating in the opposite direction and loosening. This self-locking mechanism is essential to ensure long-term stability and safety; at the same time, the wedge-shaped structure can more effectively transmit and disperse the load pressure. When an external force acts on the connection, the wedge-shaped structure helps to evenly distribute the force over the entire connection surface, thereby reducing the possibility of stress concentration and fatigue damage; under earthquake or other vibration conditions, the sleeve nut with a wedge structure can provide additional stability. The wedge-shaped structure can maintain a tight state when subjected to vibration, reducing the loosening of the connection caused by vibration. Although the wedge-shaped structure provides a self-locking function, it also allows the bolt to be easily installed and removed when necessary, because the wedge-shaped structure can be unlocked by applying a rotational force, making maintenance and replacement simple.

[0046] According to another aspect of the present application, the outer surface of the sleeve nut is provided with threads. The threads can increase the friction between the sleeve nut and the upper and lower prefabricated pipe piles, thereby improving the stability and safety of the connection. When the planetary gear bolt is screwed into the sleeve nut, the threads can effectively convert the rotational power into an axial tightening force, thereby ensuring that the connection will not loosen due to vibration or external force.

[0047] During the use of the present application, first, the sleeve nut is embedded. An anchoring steel bar is welded to the end of the sleeve nut, and it is embedded in the pipe pile when the prestressed pipe pile is made. A positive thread sleeve nut is embedded at one end of the pipe pile, and a reverse thread sleeve nut is embedded at the other end; a hole is drilled at the bottom of the sleeve nut, and the bottom pier head of the longitudinal through-long steel bar (including prestressed steel bar) becomes thicker and passes through the sleeve nut to be anchored in the pile. A positive thread sleeve nut is set at one end of the pipe pile, and a reverse thread sleeve nut is set at the other end.

[0048] Then, put the lower prefabricated pipe pile into the soil. Position and lay out the lines, drive the lower prefabricated pipe pile into the pile hole for fixation, and stop piling at a height of about 0.5m from the ground. At this time, the sleeve nut at the connection of the lower prefabricated pipe pile is reverse threaded.

[0049] Next, lift and center the upper prefabricated pipe pile. Lift the upper prefabricated pipe pile, at which point the sleeve nut at the upper prefabricated pipe pile connection is a positive thread, and lift the upper prefabricated pipe pile to just above the lower prefabricated pipe pile.

[0050] Then assemble the connector. Pass the planetary gear bolts through the bolt holes on the bracket steel plate and place them on the upper side; place the inner gear ring on the inner side of the planetary gear bolts and the outer gear ring on the outer side of the planetary gear bolts, paying attention to the gear meshing; pass the upper steel plate through the planetary gear bolts and place it on the upper side.

[0051] Finally, connect the piles. Clean the surface of the lower prefabricated pipe pile and connect them with manual assistance. The planetary gear bolts and sleeve nuts correspond one by one and enter the guide section. Use the rotating handle to rotate the outer gear ring, and the planetary gear bolts only rotate on their own. Slowly lower the upper prefabricated pipe pile, and the outer gear ring drives the planetary gear bolts to screw into the sleeve nut until the planetary gear bolts are completely screwed into the sleeve nut. After tightening, remove the rotating handle on the outer gear ring. At this time, the upper and lower prefabricated pipe piles become a whole.

[0052] The mechanical connection method of the present application not only has fast pile connection and no exposure of the entire structure, but also the connection of several planetary gear bolts can provide higher lateral rigidity and stability, and the joint strength can be guaranteed.

[0053] Furthermore, a standardized, modular, and detachable planetary gear bolt and sleeve nut design can be adopted to reduce processing difficulty and cost, and improve production efficiency and quality control; corrosion-resistant, wear-resistant, and high-strength materials can be used to make planetary gear bolts and sleeve nuts, and surface treatment or coating protection can be performed to extend service life and durability; a double-layer or multi-layer planetary gear bolt and sleeve nut structure can be adopted to increase the bearing capacity and stiffness of the joint, and improve resistance to horizontal loads or bending moments; an adjustable or deformable planetary gear bolt and sleeve nut structure can be adopted to increase the ductility and toughness of the joint, and improve seismic resistance and safety.

[0054] It should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A prefabricated pipe pile that uses gears to rotate bolts, characterized in that: include: An upper prefabricated pipe pile mechanism, the upper prefabricated pipe pile mechanism comprising an upper prefabricated pipe pile and a sleeve nut placed in the upper prefabricated pipe pile; A lower prefabricated pipe pile mechanism, the lower prefabricated pipe pile mechanism comprising a lower prefabricated pipe pile and a sleeve nut placed in the lower prefabricated pipe pile; A connecting mechanism, the connecting mechanism comprising: A connecting member, the connecting member comprising a predetermined number of planetary gear bolts arranged in a circle, an inner gear ring arranged inside the planetary gear bolts, and an outer gear ring arranged outside the planetary gear bolts; Steel plates, the steel plates comprising an upper steel plate and a bracket steel plate, the upper steel plate and the bracket steel plate are provided with bolt holes, the planetary gear bolts pass through the bolt holes to connect with the upper steel plate and are placed on the upper side; the planetary gear bolts pass through the bolt holes to connect with the bracket steel plate and are placed on the lower side; The rotating handles are arranged on both sides of the connecting piece. The upper and lower prefabricated pipe piles rotate the connecting piece by rotating the rotating handles, and the planetary gear bolts are screwed into the sleeve nuts for connection.

2. The prefabricated pipe pile using gears to rotate bolts according to claim 1, characterized in that: The sleeve nuts are arranged in equal intervals in the upper and lower prefabricated pipe piles, the planetary gear bolts are located between the outer gear ring and the inner gear ring, and the positions of the planetary gear bolts and the sleeve nuts correspond one to one.

3. The prefabricated pipe pile using gears to rotate bolts according to claim 2, characterized in that: The planetary gear bolt has a positive thread on the upper side of the gear and a negative thread on the lower side; The sleeve nut embedded in the upper prefabricated pipe pile is a positive thread, and the sleeve nut embedded in the lower prefabricated pipe pile is a reverse thread; The positive thread end of the planetary gear bolt is connected with the positive thread sleeve nut in the upper prefabricated pipe pile, and the negative thread end of the planetary gear bolt is connected with the negative thread sleeve nut in the lower prefabricated pipe pile.

4. The prefabricated pipe pile using gears to rotate bolts according to claim 3, characterized in that: The sleeve nut is provided with a guide and positioning section, and there is no thread within the range of the guide and positioning section.

5. The prefabricated pipe pile using gears to rotate bolts according to claim 1 or 4, characterized in that: The bottom of the sleeve nut is provided with a longitudinal through-length rib, and the end of the longitudinal through-length rib is provided with a pier head. The longitudinal through-length rib passes through the sleeve nut and is buried in the upper and lower prefabricated pipe piles and is anchored by the pier head.

6. The prefabricated pipe pile using gears to rotate bolts according to claim 1, characterized in that: The rotating handle is detachable, a notch is provided on the outer gear ring, and the cross-sectional area of ​​the rotating handle is consistent with the shape of the notch.

7. The prefabricated pipe pile using gears to rotate bolts according to claim 1, characterized in that: A spring washer is arranged in the sleeve nut.

8. The prefabricated pipe pile using gears to rotate bolts according to claim 1, characterized in that: The steel plates are all hollow circle structures, and the diameter of the hollow circle is the same as the inner hollow circle diameter of the internal gear ring.

9. The prefabricated pipe pile using gears to rotate bolts according to claim 1, characterized in that: The internal structure of the sleeve nut is wedge-shaped.

10. The prefabricated pipe pile using gears to rotate bolts according to claim 1, characterized in that: The outer surface of the sleeve nut is provided with threads.

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