Clamping and locking type connecting piece for concrete precast pile and connecting pile
Through the mechanical connection of the locked connector, the problems of easy corrosion and strong operation dependence of traditional welding connections are solved, and efficient and stable connection of prefabricated piles are achieved.
Patent Information
- Application Number
- CN202422315947.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-09-23
AI Technical Summary
The welding connection method of traditional prefabricated piles is susceptible to corrosion and workers' technical level, resulting in connection failure and the connection quality cannot be guaranteed.
The locking connector is adopted, including the upper nut sleeve, the lower nut sleeve and the snap connector, which is replaced by threaded connection and mechanical connection of the elastic insert rod to the barb, replacing the traditional end plate welding.
It realizes efficient connection of the upper and lower section pile bodies, with simple connection method and easy operation, enhances the prefabricated capability and avoids corrosion problems.
Smart Images
Figure CN223269206U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of reinforced concrete precast piles, in particular to a locking type connector for concrete precast piles and a connecting pile. Background Art
[0002] During the use of precast piles, different diameters, lengths and types of precast piles are selected according to different geological conditions and force requirements. These precast piles need to be reliably connected to form a pile body that meets the use length.
[0003] Traditional prefabricated pipe piles are connected with end plates at both ends, and the pipe piles need to be connected by welding. After the connection, the pile foundation is driven into the ground by piling equipment. However, because the underground soil contains corrosive substances to steel, especially chloride salts, the steel plates buried in the soil will be corroded to varying degrees, causing the connection between the pipe piles to break, making the connection invalid and unable to exert the bearing capacity of the pile foundation. This is very common in many damaged piles. In addition, the steel plate welding connection method is also greatly affected by the workers' technical level and weather, which is why the connection quality cannot be guaranteed. Utility Model Content
[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.
[0005] In view of the above problems and / or the problems existing in the existing reinforced concrete precast piles, the present utility model is proposed.
[0006] Therefore, the purpose of the present invention is to provide a locking connector and connecting piles for precast concrete precast piles. Precast piles of different diameters, lengths and types are selected according to different geological conditions and force requirements, and a mechanical connection method is set to achieve efficient connection of the upper and lower sections of the pile body, replacing traditional end plate welding, making the assembly capacity stronger, the connection method simpler and easier to operate.
[0007] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:
[0008] A locking connector for a precast concrete pile, used to connect an upper pile section and a lower pile section, comprising an upper nut sleeve, a lower nut sleeve and a clamping member;
[0009] The clamping member includes a threaded connector, an elastic rod and a barb; the threaded connector is a cylindrical connector with an external thread, and the elastic rod is provided at the bottom; the elastic rod is a hollow cylindrical ring-shaped column; a plurality of vertical openings are evenly and symmetrically arranged along the circumference of the elastic rod, and a barb is provided between each two vertical openings, the barb being provided on a side away from the center of the elastic rod and integrally formed with the bottom of the elastic rod; the entire elastic rod and barb can be retracted toward the center of the elastic rod under the action of an external force;
[0010] The upper nut sleeve is provided with an internal thread for connecting to the threaded connector;
[0011] The lower nut sleeve is provided with a convex-shaped socket which is narrow at the top and wide at the bottom. The upper part of the socket is used to accommodate the elastic plug rod, and the inner diameter of the lower part is larger than that of the upper part to form a slot for clamping the barb.
[0012] As a preferred technical solution, the outer diameter of the lower nut sleeve is greater than the outer diameter of the upper nut sleeve.
[0013] As a preferred technical solution, the outer wall of the elastic insertion rod is inclined inward from the threaded connector side to the barb side.
[0014] As a preferred technical solution, the upper portion of the barb is a right-angled section so as to fit with the top and side walls of the slot, and the lower portion of the barb is an inclined surface.
[0015] A connecting pile comprises a plurality of pile bodies connected longitudinally, wherein adjacent upper pile bodies and lower pile bodies are connected as a whole via a locking connector to form a pile body that meets use requirements.
[0016] As a preferred technical solution, based on the cross-sectional shape, the pile body includes a square, circular or variable diameter solid pile or hollow pile.
[0017] As a preferred technical solution, a plurality of upper nut sleeves are pre-embedded at the bottom of the upper pile body, and an equal number of lower nut sleeves are pre-embedded at the top of the lower pile body.
[0018] As a preferred technical solution, a steel cage is pre-embedded in both the upper and lower pile sections, and the main bars of the steel cage are connected between the upper nut sleeve and the lower nut sleeve of the same pile section.
[0019] As an optimal technical solution, the top end of the upper nut sleeve is opened with a hole for connecting to the bottom end of the main reinforcement of the upper section of the pile body; the bottom end of the lower nut sleeve is opened with a hole for connecting to the top end of the main reinforcement of the lower section of the pile body.
[0020] As a preferred technical solution, the inner sides of the upper and lower nut sleeves are clamped with the ends of the main reinforcement through a limiting structure.
[0021] Compared with the existing technology, the utility model has the beneficial effect of achieving efficient connection of the upper and lower pile sections by setting a mechanical connection component, replacing the traditional end plate welding, making the assembly capability stronger, the connection method simpler and easier to operate. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive labor. Among them:
[0023] Figure 1 A schematic diagram of a locking connector according to the present invention;
[0024] Figure 2 Schematic diagram of the connecting pile of the present invention.
[0025] In the figure: 100, upper section of the pile body; 101, lower section of the pile body; 102, main reinforcement; 210, upper nut sleeve; 220, lower nut sleeve; 230, slot; 240, limiting structure; 250, threaded connector; 260, elastic plug rod; 270, barb. DETAILED DESCRIPTION
[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0027] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing the embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.
[0028] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.
[0029] See also Figure 1 、 2 The present invention provides a locking connector for a precast concrete pile, which is used to connect an upper pile body 100 and a lower pile body 101, and includes an upper nut sleeve 210, a lower nut sleeve 220 and a clamping member;
[0030] The clamping part includes a threaded connector 250, an elastic rod 260 and a hook 270; the threaded connector is a cylindrical connector with an external thread, and an elastic rod 260 is provided at the bottom; the elastic rod is a cylindrical hollow annular column as a whole; four vertical openings are evenly and symmetrically arranged along the circumference of the elastic rod 260, and a hook 270 is provided between each two vertical openings. The hook 270 is provided on the side away from the center of the elastic rod and is integrally formed with the bottom of the elastic rod 260; the entire elastic rod 260 and the hook 270 can be retracted toward the center of the elastic rod 260 under the action of external force.
[0031] The outer diameter of the lower nut sleeve is greater than the outer diameter of the upper nut sleeve.
[0032] The upper nut sleeve 210 is provided with an internal thread for connecting to the threaded connector 250 .
[0033] The outer wall of the lower nut sleeve 220 is a smooth inscribed decagonal cylinder, and a convex-shaped smooth inner wall socket with a narrow upper part and a wide lower part is provided inside; the upper half of the socket is used to accommodate the elastic plug rod 260, and the lower half has a thinner wall thickness and a larger inner diameter than the upper half, forming a slot 230 for clamping the hook.
[0034] Preferably, the outer wall of the elastic rod 260 is inclined toward the center of the elastic rod from the side of the threaded connector 250 to the side of the barb 270. Preferably, the barb 270 is smoothly connected to the elastic rod 260, and the corners are provided with rounded corners for easy insertion. More preferably, the upper portion of the barb is a right-angle section so as to fit with the top and side walls of the slot, and the lower portion of the barb is an inclined surface so as to be inserted into the socket during installation. In a natural state, the outer wall size of the barb at the largest point is larger than the top opening of the socket of the lower nut sleeve. During installation, the elastic rod is compressed inwardly. After entering the socket of the lower nut sleeve, as the inner diameter of the socket increases, the barb expands outward and locks with the slot.
[0035] The utility model also provides a connecting pile, comprising a plurality of pile bodies longitudinally connected by the locking connector, an upper pile body and a lower pile body, wherein adjacent upper pile bodies and lower pile bodies are connected as a whole by the locking connector to form a pile body that meets the use requirements.
[0036] Preferably, based on the cross-sectional shape, the pile body includes a square, circular or variable diameter solid pile or hollow pile.
[0037] Preferably, a plurality of upper nut sleeves are embedded in the bottom of the upper pile body, and an equal number of lower nut sleeves are embedded in the top of the lower pile body. The number of nut sleeves is determined according to the pile foundation pipe diameter and the number of steel bars.
[0038] Preferably, a steel cage is embedded in both the upper and lower pile sections, and the main bars 102 of the steel cage are connected between the upper nut sleeve and the lower nut sleeve of the same pile section.
[0039] Preferably, the top end of the upper nut sleeve is opened with a hole for connecting to the bottom end of the main reinforcement of the upper pile section; similarly, the bottom end of the lower nut sleeve is opened with a hole for connecting to the top end of the main reinforcement of the lower pile section. The two ends of the same main reinforcement are respectively connected to the upper nut sleeve 210 and the lower nut sleeve 220 inside the pile section. The upper and lower nut sleeves are connected by a clamping member to achieve a mechanical connection between the upper and lower pile sections. Structural adhesive is also applied to the surface where the upper and lower pile sections meet, which is squeezed out when the upper and lower pile sections are connected, thereby achieving a stable connection between the two pile sections.
[0040] Preferably, in this embodiment, the inner sides of the upper and lower nut sleeves are clamped with the ends of the main reinforcement through the limiting structure 240, ensuring the stable connection between the upper nut sleeve 210 and the lower nut sleeve 220, and further ensuring the stable connection between the two concrete pile bodies.
[0041] The main reinforcement 102 can be made of threaded steel, PC steel rod or steel strand. The main reinforcement 102 made of various materials enhances the practicality of the device, allowing the operator to select the appropriate material according to the actual use situation:
[0042] When the main reinforcement 102 is made of threaded steel, a threaded through hole matching the threaded end is provided in the upper nut sleeve 210 and the lower nut sleeve 220, and the thread of the main reinforcement is screwed into the threaded through hole. The limiting structure is an enlarged portion provided at the threaded end, and the diameter of the enlarged portion is larger than the diameter of the threaded through hole, so that the main reinforcement can be limited in the nut sleeve; when the main reinforcement 102 is a PC steel bar, the limiting structure includes a through hole provided at the bottom of the upper nut sleeve 210 and the lower nut sleeve 220 and a flange provided on the inner side of the through hole, and the internal space of the flange is The space is funnel-shaped and cooperates with the steel rod; when the main reinforcement 102 is a steel strand, the limiting structure includes a conical hole provided at the bottom of the upper nut sleeve 210 and the lower nut sleeve 220 and with the large mouth facing inward, and a steel strand anchor head with a conical outer surface is provided in the conical hole. The outer surface of the steel strand anchor head cooperates with the conical hole, and the steel strand anchor head is limited in the conical hole, and a steel wire retaining spring is provided on the outside of the steel strand anchor head. The steel strand anchor head is sleeved and fixed on the end of the steel strand to realize the connection between the steel strand and the upper nut sleeve 210 and the lower nut sleeve 220.
[0043] Working principle: Before connecting the piles, the elastic rod 250 is fixed to the upper nut sleeve through a threaded connection. When the upper and lower pile sections are connected, the elastic rod 250 is inserted into the lower nut sleeve 220. Under the compression of the pile body, the elastic rod is tightened inward and continuously squeezed into the lower nut sleeve 220 until the hook reaches the position of the slot 230. The elastic rod 250 is stressed and rebounds, and the hook and the slot 230 are locked, completing the mechanical connection of the connector, thereby realizing the connection between the upper and lower pile sections.
[0044] While the present invention has been described above with reference to specific embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as no structural conflicts exist, the various features of the embodiments disclosed herein may be combined with one another in any manner, and the omission of an exhaustive description of these combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.
Claims
1. A locking connector for a precast concrete pile, used to connect an upper pile section and a lower pile section, characterized in that: It includes an upper nut sleeve, a lower nut sleeve and a clamping piece; The clamping member includes a threaded connector, an elastic rod and a barb; the threaded connector is a cylindrical connector with an external thread, and the elastic rod is provided at the bottom; the elastic rod is an annular column with a cylindrical hollow; a plurality of vertical openings are evenly and symmetrically arranged along the circumference of the elastic rod, and a barb is provided between each two vertical openings, the barb being provided on a side away from the center of the elastic rod and integrally formed with the bottom of the elastic rod; the entire elastic rod and barb can be retracted toward the center of the elastic rod under the action of an external force; The upper nut sleeve is provided with an internal thread for connecting to the threaded connector; The lower nut sleeve is provided with a convex-shaped socket which is narrow at the top and wide at the bottom. The upper part of the socket is used to accommodate the elastic plug rod, and the inner diameter of the lower part is larger than that of the upper part to form a slot for clamping the barb.
2. The locking connector for precast concrete piles according to claim 1, characterized in that: The outer diameter of the lower nut sleeve is greater than the outer diameter of the upper nut sleeve.
3. The locking connector for precast concrete piles according to claim 1, characterized in that: The outer wall of the elastic insertion rod is inclined inwardly from the threaded connector side to the barb side.
4. The locking connector for precast concrete piles according to claim 1, characterized in that: The upper portion of the barb is a right-angled section so as to fit with the top and side walls of the slot, and the lower portion of the barb is an inclined surface.
5. A connecting pile, characterized in that: It comprises a plurality of pile bodies connected longitudinally, wherein the adjacent upper pile body sections and lower pile body sections are connected as a whole via a locking type connector to form a pile body that meets the use requirements.
6. The connecting pile according to claim 5, characterized in that: According to the cross-sectional shape, the pile body includes a square, circular or variable diameter solid pile or a hollow pile.
7. The connecting pile according to claim 5, characterized in that: A plurality of upper nut sleeves are pre-buried at the bottom of the upper pile body, and an equal number of lower nut sleeves are pre-buried at the top of the lower pile body.
8. The connecting pile according to claim 5, characterized in that: Steel cages are embedded in both the upper and lower pile bodies, and the main bars of the steel cages are connected between the upper nut sleeve and the lower nut sleeve of the same pile.
9. The connecting pile according to claim 8, characterized in that: The top end of the upper nut sleeve is opened with a hole for connecting to the bottom end of the main reinforcement of the upper section of the pile body; the bottom end of the lower nut sleeve is opened with a hole for connecting to the top end of the main reinforcement of the lower section of the pile body.
10. The connecting pile according to claim 9, characterized in that: The inner sides of the upper and lower nut sleeves are clamped with the ends of the main reinforcement through a limiting structure.