Self-locking connecting piece for connecting precast concrete components and connecting method

Abstract

The invention relates to a self-locking connecting piece for connecting precast concrete components. The self-locking connecting piece comprises a pre-embedded nut, an insertion type single-thread connecting pin and a pre-embedded anti-pulling sleeve. A plurality of anti-pulling sections are arranged in the embedded anti-pulling sleeve in the axis direction, and a plurality of deflectable movable anti-pulling blocks are annularly arranged in each anti-pulling section; the threaded section of the insertion type single-thread connecting pin is fixedly connected with the embedded nut, and an anti-pulling pin rod of the insertion type single-thread connecting pin can be inserted into the anti-pulling section in the axis direction. The design is reasonable and ingenious, the plug-in type single-thread connecting pin is inserted into the pre-embedded anti-pulling sleeve to achieve the anti-pulling effect, when the connecting axis deviation of two concrete prefabricated parts needing to be connected occurs, the multiple movable anti-pulling blocks in the anti-pulling section can generate different deflection angles to eliminate the influence caused by the axis deviation, and the anti-pulling effect of the concrete prefabricated parts needing to be connected is achieved. As long as the deviation of the connecting axis is controlled within the design range, the anti-pulling efficiency of the connecting piece cannot be weakened.

Description

Technical Field

[0001] This application relates to the field of precast concrete component assembly and connection technology, and in particular to a self-locking connector for connecting precast concrete components and a connection method implemented by the self-locking connector for connecting precast concrete components. Background Technology

[0002] In the field of precast concrete component assembly, traditional insert-type connectors use a pin body with interlocking annular or spiral teeth and a pre-embedded pin sleeve. During assembly, the teeth of the pin body must be precisely aligned with the interlocking teeth of the pin sleeve to provide pull-out resistance. In cases of under-insertion or over-insertion, the pin body's teeth fail to reach the interlocking position, and the connector cannot immediately provide pull-out resistance. The two precast components must then be further separated until the pin body's teeth reach the interlocking position for the connector to provide pull-out resistance. Furthermore, this type of connector has poor adaptability to axial errors at the connection nodes. It is difficult to install when the assembly axis accuracy is low, and its pull-out resistance is weakened after installation when the assembly axis accuracy is low. Traditional insert connectors can only be coaxially installed with their embedded pin sleeves and pin bodies. When there is a deviation in the connection axis between the two precast concrete components to be connected, the pin body can only be bent very slightly to accommodate the deviation. This type of insert connector is difficult to adapt to large assembly axis deviations.

[0003] The industry needs an insert connector that can adapt to the insertion depth, provide pull-out resistance once inserted, and adapt to assembly axis errors. Summary of the Invention

[0004] In view of at least one of the above technical problems, this application provides a self-locking connector for connecting precast concrete components that can adapt to assembly axis errors and insertion depths.

[0005] This application also provides a connection method implemented through the self-locking connector for connecting the precast concrete components.

[0006] An embodiment of the first aspect of this application provides a self-locking connector for connecting precast concrete components, including an embedded nut for embedding in a precast concrete component A, an insertable single-threaded connecting pin, and an embedded pull-out sleeve for embedding in a precast concrete component B that needs to be connected to the precast concrete component A; the embedded pull-out sleeve has a plurality of pull-out segments along the axial direction, and each pull-out segment has a plurality of deflectable movable pull-out blocks arranged in a ring; the threaded section of the insertable single-threaded connecting pin is fixedly connected to the embedded nut, and the pull-out pin bar of the insertable single-threaded connecting pin can be inserted into the pull-out segment along the axial direction.

[0007] As a further improvement of the present invention, the several deflectable movable anti-pull-out blocks arranged in a ring form an anti-pull-out cone ring, and the inner wall of the anti-pull-out cone ring forms a trumpet-shaped hole to facilitate the insertion of the anti-pull-out pin. The bottom of the anti-pull cone ring is located on the side near the connection part of the precast concrete component B.

[0008] As a further improvement of the present invention, the top inner edge of the movable anti-pull-out block is set as a curved surface corresponding to the anti-pull-out pin.

[0009] As a further improvement of the present invention, the outer circumference of the anti-pull-out cone ring is provided with a plurality of springs that reduce the inner diameter of the movable anti-pull-out block.

[0010] As a further improvement of the present invention, the outer circumference of the anti-pull-out cone ring is provided with a positioning structure for placing the spring; The positioning structure is located on the outer side of the upper end of the anti-pull-out cone ring.

[0011] As a further improvement of the present invention, the anti-pull segment includes a limiting ring and a supporting ring, the limiting ring and the supporting ring being sequentially arranged in the pre-embedded anti-pull sleeve, the supporting ring being located on the side near the connection part of the precast concrete component B; the movable anti-pull block is movably arranged in the internal space formed by the inner walls of the limiting ring and the supporting ring.

[0012] As a further improvement of the present invention, the diameter of the internal space formed by the inner walls of the limiting ring and the support ring gradually decreases from the limiting ring to the support ring; a supporting inner arc surface adapted to the bottom of the movable pull-out block is provided at the angle between the end face of the inner hole of the limiting ring near the support ring and the inner wall; a limiting inner arc surface adapted to the bottom of the movable pull-out block is provided at the part of the support ring near the inner hole of the limiting ring, and the limiting inner arc surface and the supporting inner arc surface cooperate so that the movable pull-out block can deflect within the arc groove formed by the limiting inner arc surface and the supporting inner arc surface without dislodging from the support ring.

[0013] As a further improvement of the present invention, the pre-embedded anti-pull-out sleeve includes an anti-pull-out anchoring ring and an anchoring back cover. The anchoring back cover and the anti-pull-out anchoring ring are joined to form a receiving space with an open bottom end. A plurality of the anti-pull-out segments are disposed in the receiving space, and the bottom end of the receiving space is located on the side near the connection part of the precast concrete component B.

[0014] A connection method implemented using the self-locking connector for connecting precast concrete components, comprising the following steps: The pre-embedded nut is pre-embedded into the connection part of the precast concrete component A; The pre-embedded anti-pull-out sleeve is pre-embedded into the connection part of the precast concrete component B; The pre-embedded anti-pull-out sleeve is provided with several anti-pull-out segments, and several deflectable movable anti-pull-out blocks are arranged in a ring in the anti-pull-out segments; Screw the insert-type single-threaded connecting pin into the prefabricated nut; The anti-pull-out pin of the insert-type single threaded connecting pin is inserted into the pre-embedded anti-pull-out sleeve, and the anti-pull-out pin passes through the anti-pull-out segment; When precast concrete component A and precast concrete component B tend to move away from each other, the movable pull-out block generates pull-out restraint on the pull-out pin, and the force of this pull-out restraint is transmitted to the pull-out anchor ring and then to the concrete structure.

[0015] As a further improvement of the present invention, a plurality of springs are provided on the outer periphery of the movable anti-pull block to reduce the inner diameter of the movable anti-pull block. When a deviation occurs in the direction of the connecting axis during assembly, the spring drives the movable anti-pull-out blocks to deflect at different angles, so that each movable anti-pull-out block contacts the outer wall of the anti-pull-out pin located in an eccentric position, thereby generating an anti-pull-out effect.

[0016] The embodiments of this application have the following technical effects: The present invention is reasonably and ingeniously designed. The insertion-type single-threaded connecting pin can generate pull-out resistance when inserted into the pre-embedded pull-out sleeve. When the connection axis of two precast concrete components that need to be connected deviates, the multiple movable pull-out blocks in the pull-out segment can deflect at different angles to eliminate the influence caused by the axis deviation. As long as the connection axis deviation is controlled within the design range, the pull-out resistance of the connector will not be weakened. When the two components after connection move closer to each other, the insertion-type single-threaded connecting pin will be inserted deeper into the pre-embedded pull-out sleeve and can immediately generate pull-out resistance.

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the pre-embedded nut in this invention; Figure 3 This is a schematic diagram of the insert-type single-threaded connecting pin in this invention; Figure 4 This is a schematic diagram of the anti-pull-out anchoring ring in this invention; Figure 5 This is a schematic diagram of the anchoring back cover in this invention; Figure 6 This is a schematic diagram of the pre-embedded anti-pull-out sleeve in this invention; Figure 7 This is a cross-sectional view of the pre-embedded anti-pull-out sleeve in this invention; Figure 8 This is a schematic diagram of the assembly of the anti-uplift segment and the movable anti-uplift block in this invention; Figure 9 This is a schematic diagram of the insertable single-threaded connecting pin in this invention when it is not inserted; Figure 10 This is a schematic diagram of the insert-type single-threaded connecting pin after it has been screwed into the pre-embedded nut in this invention; Figure 11 This is a schematic diagram of the connection between the insert-type single-threaded connecting pin and the pre-embedded nut and pre-embedded anti-pull-out sleeve in this invention; Figure 12 This is a schematic diagram of the eccentric connection of the insert-type single-threaded connecting pin with the pre-embedded nut and the pre-embedded anti-pull-out sleeve in this invention. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0021] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In the embodiments of this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this invention can be understood according to the specific circumstances.

[0024] like Figures 1 to 12 As shown, an embodiment of this application provides a self-locking connector for connecting precast concrete components, including an embedded nut 1 for embedding into a precast concrete component A4, an insertable single-threaded connecting pin 2, and an embedded pull-out sleeve 3 for embedding into a precast concrete component B5 that needs to be connected to the precast concrete component A4. The embedded pull-out sleeve 3 has several pull-out segments 6 along its axial direction, and each pull-out segment 6 has several deflectable movable pull-out blocks 7 arranged in a ring. The threaded section 21 of the insertable single-threaded connecting pin 2 is fixedly connected to the embedded nut 1, and the pull-out pin 22 of the insertable single-threaded connecting pin 2 can be inserted into the pull-out segment 6 along its axial direction. Specifically, it is inserted into the several deflectable movable pull-out blocks 7 arranged in a ring.

[0025] The embedded nut 1 includes an outer annular or threaded anchoring rib, anti-rotation rib, and internal thread. The embedded nut 1 may also include other anchoring structures to provide anchoring performance.

[0026] One end of the insertable single-threaded connecting pin 2 is an external thread structure that adapts to the internal thread of the pre-embedded nut 1, and the other end is an anti-pull-out pin 22. The anti-pull-out pin 22 can be a round bar with a reverse taper or a straight bar with a rough outer surface.

[0027] The several deflectable movable anti-pull-out blocks 7 arranged in a ring form an anti-pull-out cone ring, and the inner wall of the anti-pull-out cone ring forms a trumpet-shaped hole 71 to facilitate the insertion of the anti-pull-out pin 22. The bottom of the anti-pull-out cone ring is located on the side near the connection part of the precast concrete component B5. The larger end of the funnel-shaped hole 71 is the bottom, and the anti-pull-out pin 22 passes through the funnel-shaped hole 71 from the bottom of the anti-pull-out cone ring.

[0028] The top inner edge of the movable pull-out block 7 is set as a curved surface 72 corresponding to the pull-out pin 22.

[0029] The outer circumference of the anti-pull-out cone ring is provided with several springs 8 that reduce the inner diameter of the anti-pull-out cone ring.

[0030] Specifically, multiple springs 8 are installed at appropriate positions on the movable anti-pull block 7 or on the support ring. The springs 8 act to cause the movable anti-pull block 7 to deflect at the smallest deflection angle to the inner diameter of the anti-pull cone ring formed by the multiple movable anti-pull blocks 7 within the anti-pull segment 6.

[0031] When the curved surface 72 of the movable anti-pull block 7 is in close contact with the outer peripheral surface of the anti-pull pin 22 under the action of the spring 8, and the two precast concrete components tend to move away from each other, the anti-pull pin 22 tends to move away from the anti-pull cone ring. The anti-pull pin 22 tends to deflect the movable anti-pull block 7 at a larger angle and bring the curved surface 72 closer to the connecting axis. At the same time, the outer peripheral surface of the anti-pull pin 22 resists the movable anti-pull block 7 from deflecting at a larger angle, preventing the curved surface 72 of the movable anti-pull block 7 from getting closer to the connecting axis. Thus, the movable anti-pull block 7 generates an anti-pull action against the anti-pull pin 22.

[0032] The spring 8 is a ring tension spring or a regular compression spring.

[0033] The outer circumference of the anti-pull-out cone ring is provided with a positioning structure 74 for placing the spring 8; The positioning structure 74 is located on the outer side of the upper end of the anti-pull-out cone ring.

[0034] The positioning structure 74 can be one or more, and each positioning structure 74 holds one or more springs 8, depending on the usage requirements. In this embodiment, the positioning structure can be a groove or other structure that can be used to position the spring 8.

[0035] The anti-uplift segment 6 includes a limiting ring 61 and a supporting ring 62. The limiting ring 61 and the supporting ring 62 are sequentially arranged in the pre-embedded anti-uplift sleeve 3. The supporting ring 62 is located on the side near the opening of the connection part of the precast concrete component B5. The movable anti-uplift block 7 is movably arranged in the internal space formed by the inner walls of the limiting ring 61 and the supporting ring 62.

[0036] The diameter of the internal space formed by the inner walls of the limiting ring 61 and the support ring 62 gradually decreases from the limiting ring 61 to the support ring 62; a supporting inner arc surface adapted to the bottom of the movable anti-pull-out block 7 is provided at the angle between the end face of the inner hole of the limiting ring 61 near the support ring 62 and the inner wall; a limiting inner arc surface adapted to the bottom of the movable anti-pull-out block 7 is provided at the part of the support ring 62 near the inner hole of the limiting ring 61. The limiting inner arc surface and the supporting inner arc surface cooperate so that the movable anti-pull-out block 7 can deflect within the arc groove formed by the limiting inner arc surface and the supporting inner arc surface without falling out.

[0037] The pre-embedded anti-pull-out sleeve 3 includes an anti-pull-out anchoring ring 31 and an anchoring back cover 32. The anchoring back cover 32 and the anti-pull-out anchoring ring 31 are joined to form a receiving space with a bottom opening 311. Several anti-pull-out segments 6 are arranged in the receiving space. The bottom end of the receiving space is located on the side near the connection part of the precast concrete component B5.

[0038] The anchoring back cover 32 and the pull-out anchoring ring 31 are connected by a thread or other connection method that can generate pull-out resistance. The front end of the anchoring back cover 32 is also provided with a pull-out reinforcing block 321.

[0039] Specifically, the pre-embedded anti-pull-out sleeve 3 includes multiple anti-pull-out segments 6 installed on the anti-pull-out anchoring ring 31. Each anti-pull-out segment 6 includes a limiting ring 61 and a supporting ring 62. The limiting ring 61 and the supporting ring 62 have arc-shaped grooves, which are the inner walls of the limiting ring 61 and the supporting ring 62. Multiple movable anti-pull-out blocks 7 are movably annularly installed within the arc-shaped grooves of the limiting ring 61 and the supporting ring 62. The movable anti-pull-out blocks 7 can rotate freely within the arc-shaped grooves but cannot disengage from them. When the anti-pull-out pin 22 is inserted, a ring tension spring or a regular compression spring drives the movable anti-pull-out blocks 7 to rotate within the arc-shaped grooves to the position with the smallest inner diameter formed by the movable anti-pull-out blocks 7. The anchoring cover 32 is installed at the end of the anti-pull-out anchoring ring 31 to close the anti-pull-out anchoring ring 31.

[0040] In this embodiment, a receiving cavity 312 can also be provided in the pre-embedded anti-pull-out sleeve 3 for each anti-pull-out segment 6, and each anti-pull-out segment 6 is placed in a receiving cavity 312. Multiple anti-pull-out segments 6 are arranged in sequence and thus fixed in the receiving space.

[0041] In this embodiment, the position of the smallest inner diameter means that when the anti-pull-out pin 22 is inserted into the anti-pull-out cone ring, the top inner wall of the trumpet-shaped hole 71 of the anti-pull-out cone ring will contract to the smallest position that can be reached under the action of the spring 8. The inner wall of the trumpet-shaped hole 71 surrounds the outer circumference of the anti-pull-out pin 22. At this time, the inner diameter is the smallest value that can be reached, and the movable anti-pull-out block 7 generates an anti-pull-out effect on the anti-pull-out pin 22.

[0042] The diameter of the pull-out anchoring ring 31 gradually decreases from the end to the front end, and the front end of the pull-out anchoring ring 31 is close to or level with the connection part of the precast concrete component B5.

[0043] Multiple limiting rings 61 are installed inside the pull-out anchoring ring 31. Multiple movable pull-out blocks 7 are arranged in a ring and are movably installed at appropriate positions on the limiting rings 61. Multiple supporting rings 62 are respectively installed on the rear side of the multiple limiting rings 61, which restricts the movable pull-out blocks 7 from coming out but allows the movable pull-out blocks 7 to deflect appropriately. One limiting ring 61 and one supporting ring 62 form a pull-out segment 6, and multiple movable pull-out blocks 7 are movably installed in one pull-out segment 6.

[0044] A connection method implemented using the self-locking connector for connecting precast concrete components, comprising the following steps: The pre-embedded nut 1 is pre-embedded into the connection part of the precast concrete component A4; The pre-embedded anti-pull-out sleeve 3 is pre-embedded into the connection part of the precast concrete component B5; The pre-embedded anti-pull-out sleeve 3 is provided with a number of anti-pull-out segments 6, and a number of deflectable movable anti-pull-out blocks 7 are arranged in a ring in the anti-pull-out segments 6. Screw the insert-type single-threaded connecting pin 2 into the prefabricated nut; The anti-pull-out pin 22 of the insert-type single thread connecting pin 2 is inserted into the pre-embedded anti-pull-out sleeve 3, and the anti-pull-out pin 22 passes through the anti-pull-out segment 6; Specifically, when connecting two precast concrete components, the precast concrete component A4 is gradually moved closer to the precast concrete component B5 along the connecting axis, and the pull-out pin 22 of the insert-type single thread connecting pin 2 is gradually inserted into the pre-embedded pull-out sleeve 3, while the pull-out pin 22 passes through the pull-out cone ring and is inserted into several deflectable movable pull-out blocks 7 arranged in a ring.

[0045] Under the action of spring 8, each of the movable anti-pull-out blocks 7 in the anti-pull-out cone ring is pressed against and adheres to the outer peripheral surface of the anti-pull-out pin 22; When precast concrete component A4 and precast concrete component B5 tend to move away from each other, the movable pull-out block 7 generates pull-out restraint on the pull-out pin 22, and the force of this pull-out restraint is transmitted to the pull-out anchor ring 31 and then to the concrete structure.

[0046] A plurality of springs 8 are arranged around the outer periphery of the movable anti-pull block 7 to reduce the inner diameter of the movable anti-pull block 7; When a deviation occurs in the direction of the connecting axis during assembly, the spring 8 drives the movable anti-pull block 7 to deflect at different angles, so that each movable anti-pull block 7 contacts the outer wall of the anti-pull pin 22 located in the eccentric position, thereby generating an anti-pull effect.

[0047] In use, the pre-embedded nut 1 is pre-embedded into the connection part of the precast concrete component A4, and the pre-embedded anti-pull-out sleeve 3 is pre-embedded into the connection part of the precast concrete component B5. When it is necessary to connect two precast concrete components, the insertable single-threaded connecting pin 2 is screwed into the pre-embedded nut 1 of the precast concrete component A4, causing the precast concrete component A4, which has the insertable single-threaded connecting pin 2 installed, to move closer to the precast concrete component B5, and to roughly align the connecting axes of the two precast concrete components. Then, the two precast concrete components continue to move closer to each other along the connecting axis, so that the insertable single-threaded connecting pin 2 enters the pre-embedded anti-pull-out sleeve 3. When the insertable single-threaded connecting pin 2 contacts the movable anti-pull-out block 7 of one of the anti-pull-out segments 6... As the insertable single-threaded connecting pin 2 enters, the movable pull-out block 7 is pushed by the insertable single-threaded connecting pin 2, causing the movable pull-out block 7 to deflect outward, allowing the insertable single-threaded connecting pin 2 to pass through the pull-out segment 6. When the two precast concrete components can no longer approach each other, the spring 8 drives all the movable pull-out blocks 7 in the pull-out segment 6 to contact the pull-out pin 22 of the insertable single-threaded connecting pin 2. Once the two precast concrete components tend to move away from each other, the insertable single-threaded connecting pin 2 is subjected to pull-out constraint from the movable pull-out block 7 during the process of being pulled out away from the embedded pull-out sleeve 3. The force generating this pull-out constraint is transmitted to the limiting ring 61 and the pull-out anchoring ring 31, and then to the concrete structure. If the two precast concrete components continue to move closer after connection, causing the insertable single-threaded connecting pin 2 to continue moving deeper into the embedded anti-pull-out sleeve 3, when the movement stops, the spring 8 still drives all the curved surfaces 72 of all the movable anti-pull-out blocks 7 within the anti-pull-out segment 6 to contact the anti-pull-out pin 22 of the insertable single-threaded connecting pin 2. Once the two precast concrete components tend to move away from each other, the anti-pull-out pin 22 tends to leave the anti-pull-out cone ring. The anti-pull-out pin 22 generates a tendency to deflect the movable anti-pull-out block 7 at a larger angle and for the curved surface 72 to move closer to the connecting axis. At the same time, the outer peripheral surface of the anti-pull-out pin 22 resists the movable anti-pull-out block 7 from deflecting at a larger angle, preventing the curved surface 72 of the movable anti-pull-out block 7 from moving closer to the connecting axis. The movable anti-pull-out block 7 then generates an anti-pull-out effect on the anti-pull-out pin 22. The anti-pull-out effect generated by the above mechanism can work under any circumstances, and this effect is not sensitive to the insertion depth of the insertable single-threaded connecting pin 2.

[0048] When a deviation of the connecting axis occurs during assembly, the spring 8 drives different movable anti-pull-out blocks 7 within the anti-pull-out segment 6 to deflect at different angles. However, all curved surfaces 72 of each movable anti-pull-out block 7 can contact the outer wall of the insertable single-threaded connecting pin 2 located at the eccentric position. As long as the axis deviation is within the design range and the insertable single-threaded connecting pin 2 can be inserted into the inner hole of the pre-embedded anti-pull-out sleeve 3, the connector can normally generate anti-pull-out performance.

[0049] The invention is reasonably and ingeniously designed. The insertable single-threaded connecting pin 2 can generate pull-out resistance when inserted into the pre-embedded pull-out sleeve 3. When the connecting axes of two precast concrete components to be connected deviate, the multiple movable pull-out blocks 7 in the pull-out segment 6 can deflect at different angles to eliminate the influence caused by the axis deviation. As long as the axis deviation is controlled within the design range, the pull-out resistance of the connector will not be weakened. When the two connected components move closer together, the insertable single-threaded connecting pin 2 will be inserted deeper into the pre-embedded pull-out sleeve 3 and can immediately generate pull-out resistance.

[0050] The above description is merely a preferred embodiment of this application and does not constitute any limitation on this application. Any person skilled in the art can make many possible variations and modifications to the technical solution of this application, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this application. Therefore, all equivalent changes made based on the shape, structure, and principle of this application without departing from the content of the technical solution of this application should be covered within the protection scope of this application.

Claims

1. A self-locking connector for connecting precast concrete components, characterized in that, The device includes an embedded nut for embedding into a precast concrete component A, an insertable single-threaded connecting pin, and an embedded pull-out sleeve for embedding into a precast concrete component B that needs to be connected to the precast concrete component A. The embedded pull-out sleeve has several pull-out segments along the axial direction, and several deflectable movable pull-out blocks are arranged in a ring in each pull-out segment. The threaded section of the insertable single-threaded connecting pin is fixedly connected to the embedded nut, and the pull-out pin bar of the insertable single-threaded connecting pin can be inserted into the pull-out segment along the axial direction.

2. The self-locking connector for connecting precast concrete components according to claim 1, characterized in that, The several deflectable movable anti-pull-out blocks arranged in a ring form an anti-pull-out cone ring, and the inner wall of the anti-pull-out cone ring forms a trumpet-shaped hole to facilitate the insertion of the anti-pull-out pin. The bottom of the anti-pull cone ring is located on the side near the connection part of the precast concrete component B.

3. The self-locking connector for connecting precast concrete components according to claim 2, characterized in that, The top inner edge of the movable pull-out block is set as a curved surface corresponding to the pull-out pin.

4. The self-locking connector for connecting precast concrete components according to claim 2, characterized in that, The outer circumference of the anti-pull-out cone ring is provided with several springs.

5. The self-locking connector for connecting precast concrete components according to claim 4, characterized in that, The outer circumference of the anti-pull-out cone ring is provided with a positioning structure for placing the spring; The positioning structure is located on the outer side of the upper end of the anti-pull-out cone ring.

6. The self-locking connector for connecting precast concrete components according to claim 1, characterized in that, The anti-uplift segment includes a limiting ring and a supporting ring, which are sequentially arranged in the pre-embedded anti-uplift sleeve. The supporting ring is located on the side near the connection part of the precast concrete component B. The movable anti-uplift block is movably arranged in the internal space formed by the inner walls of the limiting ring and the supporting ring.

7. The self-locking connector for connecting precast concrete components according to claim 6, characterized in that, The diameter of the internal space formed by the inner walls of the limiting ring and the support ring gradually decreases from the limiting ring to the support ring.

8. The self-locking connector for connecting precast concrete components according to claim 1, characterized in that, The pre-embedded anti-pull-out sleeve includes an anti-pull-out anchoring ring and an anchoring back cover. The anchoring back cover and the anti-pull-out anchoring ring are joined to form a receiving space with an open bottom end. Several anti-pull-out segments are arranged in the receiving space. The bottom end of the receiving space is located on the side near the connection part of the precast concrete component B.

9. A connection method implemented using a self-locking connector for connecting precast concrete components according to any one of claims 1 to 8, characterized in that, It includes the following steps: The pre-embedded nut is pre-embedded into the connection part of the precast concrete component A; The pre-embedded anti-pull-out sleeve is pre-embedded into the connection part of the precast concrete component B; The pre-embedded anti-pull-out sleeve is provided with several anti-pull-out segments, and several deflectable movable anti-pull-out blocks are arranged in a ring in the anti-pull-out segments; Screw the insert-type single-threaded connecting pin into the prefabricated nut; The anti-pull-out pin of the insert-type single threaded connecting pin is inserted into the pre-embedded anti-pull-out sleeve, and the anti-pull-out pin passes through the anti-pull-out segment; When precast concrete component A and precast concrete component B tend to move away from each other, the movable pull-out block generates pull-out restraint on the pull-out pin, and the force of this pull-out restraint is transmitted to the pull-out anchor ring and then to the concrete structure.

10. The connection method implemented by a self-locking connector for connecting precast concrete components according to claim 9, characterized in that, A plurality of springs are arranged around the outer periphery of the movable anti-pull block to reduce the inner diameter of the movable anti-pull block; When a deviation occurs in the direction of the connecting axis during assembly, the spring drives the movable anti-pull-out blocks to deflect at different angles, so that each movable anti-pull-out block contacts the outer wall of the anti-pull-out pin located in an eccentric position, thereby generating an anti-pull-out effect.

Images