Connecting piece and steel bar connecting method

Abstract

The invention relates to the technical field of mechanical manufacturing and fabricated buildings, in particular to a connecting piece. Comprising a first sleeve, a screw assembly and at least two connecting parts. The connecting part is installed on the outer wall of the first sleeve and provided with a second hole, the screw assembly comprises a first screw and a second hanging lug part, and the second hanging lug part is arranged at the end, close to the first sleeve, of the first screw; when the connecting part is mounted on the outer wall of the first sleeve, the second hanging lug part extends into the second hole; the size of the second hanging lug part is smaller than that of the second hole, and the second hanging lug part can translate and / or rotate in the second hole before the connecting piece is tensioned. The split type connecting part is used for replacing an original integrated type, cost is lower, occupied space is smaller, mechanical connection is used for replacing welding, rapid installation is facilitated, the connecting mode is open connection, the connecting quality can be detected, the size of the second hanging lug part is smaller than that of the second hole, connection can still be convenient when an error exists in rib protruding of the prefabricated part, and fault tolerance is good.

Description

Technical Field

[0001] This invention relates to the fields of mechanical manufacturing technology and prefabricated building technology, and more specifically, to a connector and a method for connecting reinforcing bars. Background Technology

[0002] Currently, the main methods for connecting reinforcing bars in precast concrete components include lap splices, welded splices, grouting sleeve connections, single / multiple sleeve connections, and connecting component connections. However, current technologies have the following drawbacks: (1) The lap splice connection of the reinforcing bars requires a long cast-in-place connection section, which results in a large amount of on-site beam formwork installation work and a long installation time, weakening the rapid assembly advantage that prefabricated buildings should have; moreover, the seismic performance of the lap splice connection of the vertical members is poor, and the design code restricts this practice. (2) The welding connection of the reinforcing bars involves a large amount of on-site welding work, which leads to a significant increase in labor costs. Furthermore, the deviation of the reinforcing bars in the precast components can easily lead to potential defects in the welding quality. (3) The grouting sleeve connection is a concealed connection, which has high requirements for the accuracy of the sleeve embedment position and the grouting quality, and the grouting quality is difficult to detect; (4) Single / multiple sleeve connections are open connections, but there are difficulties in implementation. If a single sleeve connection is used, the requirements for the centering accuracy and length accuracy of the reinforcing bars are extremely high and it is not easy to operate. If a multiple sleeve connection is used, not only is the cost of the sleeve high, but the requirements for the centering accuracy and length accuracy of the reinforcing bars are still relatively high. In addition, the quality requirements for the multiple sleeves are also very high.

[0003] (5) The connection of the connector is an open connection and a mechanical connection. It is convenient to construct and reliable in quality. It is a good method for connecting the steel bars of precast concrete components. However, there is currently no large-scale application of connectors that are convenient to connect, reliable in quality and low in cost on the market.

[0004] The prior art discloses a connection device for precast concrete components, which has good tolerance for the position and length of the reinforcing bars in the precast components, and is convenient and reliable in terms of connection. However, it occupies a large space and has a high cost. The large space occupied by the connector will lead to insufficient protective layer of the reinforcing bars at the connector position, which may pose certain quality risks. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, the present invention provides a connector that uses a split connector instead of the original one-piece connector, and can be finely adjusted to adapt to docking deviations during construction.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A connector is provided, comprising a first sleeve, a screw assembly, and at least two connecting parts; the connector is used to connect a first reinforcing bar and a second reinforcing bar. The connecting component is installed on the outer wall of the first sleeve and has a second hole. The screw assembly includes a first screw and a second lug. The second lug is located at the end of the first screw near the first sleeve, and the size of the second lug is smaller than the size of the second hole. When the connecting component is installed on the outer wall of the first sleeve, the second lug extends into the second hole. There is a first adjustment distance between the outer wall of the first screw and the inner wall of the connecting component, and a second adjustment distance between the second lug and the inner wall of the second hole, so that the first screw can translate and / or rotate within the connecting component before the connector is tightened. The first adjustment distance between the outer wall of the first screw and the inner wall of the connecting component allows for fine-tuning of translation. The second adjustment distance between the second lug and the inner wall of the second hole allows for fine-tuning of rotation, facilitating the connection of the first and second reinforcing bars.

[0007] When connecting precast concrete components, the connecting parts are installed on the outer wall of the first sleeve, and the second lug of the screw assembly is inserted into the second hole to complete the assembly of the connecting parts. Then, the first sleeve is screwed into the first reinforcing bar of a precast concrete component, and the second lug is adjusted to move and / or rotate within the second hole. After the position of the first screw is adjusted, it is then connected to the second reinforcing bar of another precast concrete component. The first screw can be directly connected to the second reinforcing bar or connected to the second reinforcing bar through other connecting parts. After the connection is completed, the connecting section is poured. After the grout solidifies, it will cover the entire connecting section.

[0008] Compared to existing technologies, this solution uses separate connecting components instead of the original one-piece design, and mechanical connections instead of welding. Furthermore, the position of the first screw can be finely adjusted. The advantages are: First, it is more cost-effective and occupies less space, avoiding quality issues caused by insufficient concrete cover at the connecting component location due to its large footprint. Second, the mechanical connection significantly reduces the length of the pre-cast connection section, allowing for the use of tool-type templates for quick installation. Third, the connection method is an exposed connection, making the connection quality inspectable. Fourth, even with slight deviations in the length and / or alignment of the first and second reinforcing bars in the precast component, the first and second reinforcing bars can still be easily connected by translating and / or rotating the first screw, providing good tolerance for errors in component prefabrication and construction.

[0009] Furthermore, the outer wall of the first sleeve is provided with at least two first lugs, and the connecting component is correspondingly provided with a first hole; when the connecting component is installed on the outer wall of the first sleeve, the first lugs are inserted into the first holes. After the connecting component is installed on the outer wall of the first sleeve, the first lugs and the connecting component are connected by tenon and mortise joints to achieve force transmission, thereby achieving a good connection effect.

[0010] Furthermore, the outer wall of the first sleeve is provided with a first corrugated portion, and the inner wall of the connecting component is correspondingly provided with a second corrugated portion. When the connecting component is installed on the outer wall of the first sleeve, the first corrugated portion and the second corrugated portion engage with each other. Force transmission is achieved through the engagement between the first corrugated portion and the second corrugated portion, thereby improving the connection strength of the connecting component.

[0011] Furthermore, the connecting component is also provided with a first cover plate and / or a second cover plate; when the connecting component is installed on the outer wall of the first sleeve, the first cover plate abuts against the end of the first sleeve away from the screw assembly, and the second cover plate abuts against the end of the first sleeve near the screw assembly. The first cover plate and the second cover plate respectively support the two ends of the first sleeve in the axial direction, which can improve the connection strength of the connecting component and facilitate the positioning of the first sleeve. This invention does not require that the first cover plate and the second cover plate must be provided or be provided simultaneously. When it is necessary to enhance the tensile connection between the first sleeve and the connecting component, the first cover plate is provided; when it is necessary to enhance the compressive connection between the first sleeve and the connecting component, the second cover plate is provided.

[0012] Furthermore, the connecting component is also provided with a support beam, which is located on the side of the second hole near the screw assembly, and the support beam is used to support the second lug.

[0013] Furthermore, the screw assembly also includes a washer fitted around the first screw and a locking nut threadedly connected to the first screw. The washer is located between the locking nut and the connecting component, and the locking nut is used to drive the washer to press the connecting component. When the connecting component is tightened, rotating the locking nut drives the washer to press the end of the connecting component, locking all connecting components. The locking nut improves the reliability of pressure transmission in the connecting component.

[0014] Furthermore, it also includes a tensioning assembly; the tensioning assembly includes a second sleeve, a second screw, and a third sleeve; the second screw is a double-threaded rod with left-hand and right-hand threads respectively, and its two ends are threadedly connected to the second sleeve and the third sleeve respectively; the internal threads of the second sleeve and the third sleeve have opposite directions of rotation and mesh with the thread of the second screw. During the installation of the connector, the tensioning assembly can be adjusted to tighten all components and ensure effective force transmission.

[0015] Furthermore, one end of the tensioning assembly is connected to the first screw, and the other end is connected to the second reinforcing bar; the tensioning assembly is used to tension the first screw and the second reinforcing bar; the second sleeve is threadedly connected to the first screw, and the third sleeve is used to connect to the second reinforcing bar.

[0016] Furthermore, it also includes a tensioning assembly; the tensioning assembly includes a second sleeve and a second screw; the second screw is a double-threaded rod with left-hand and right-hand threads respectively, and its two ends are threadedly connected to the second sleeve and the first sleeve respectively; the internal threads of the second sleeve and the first sleeve are opposite in direction and mesh with the threads of the second screw, the tensioning assembly is used to tension the first reinforcing bar and the first sleeve, and the second sleeve is threadedly connected to the first reinforcing bar.

[0017] A method for connecting reinforcing bars includes the following steps: S1: Insert the first hook into the first hole of the connecting component, and at the same time insert the second hook into the second hole of the connecting component; S2: Screw the first sleeve into the first reinforcing bar, and screw the second sleeve and the third sleeve into the first screw and the second reinforcing bar respectively; S3: Screw the second screw into both the second and third sleeves simultaneously for pre-connection; S4: Apply high-strength mortar to the contact surface between the second lug and the connecting component; S5: Continue to screw the second screw into the second sleeve and the third sleeve until all components of the connector are tightened; S6: Tighten the lock nut to press the lock nut and washer against the end of the connecting part.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. This solution uses separate connecting parts instead of the original one-piece design, which is cheaper and occupies less space. It uses mechanical connections instead of welding, which facilitates quick installation. The connection method is an exposed connection, and the connection quality can be inspected. Since the size of the second hanging ear is smaller than the size of the second hole, the exposed ribs of the prefabricated parts can still be easily connected even if there are errors in prefabrication and construction, which is more tolerant of errors. 2. The first lug and the connecting component are connected by mortise and tenon joints to achieve force transmission, thereby achieving a good connection effect; 3. Force transmission is achieved through the interlocking between the first and second corrugated parts, which improves the connection strength of the connector. 4. The first cover plate and the second cover plate respectively support the two ends of the first sleeve in the axial direction, which improves the connection strength of the connector and facilitates the positioning of the first sleeve. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure after the connector and reinforcing steel are connected and assembled in Embodiment 1; Figure 2 yes Figure 1 A structural diagram showing the components before they are assembled and connected to the reinforcing bars; Figure 3 This is a side view of the first sleeve in Embodiment 1; Figure 4 yes Figure 3 Top view; Figure 5 This is a three-dimensional structural schematic diagram of the first sleeve in Embodiment 1; Figure 6 This is a side view of the two connecting components in Embodiment 1; Figure 7 yes Figure 6 View B (side view from another direction); Figure 8 yes Figure 6 Top view; Figure 9 yes Figure 8 A vertical sectional view of the "AA" position; Figure 10 yes Figure 9 A cross-sectional view at the horizontal position of “CC”; Figure 11 yes Figure 9 A sectional view at the horizontal position of “DD”; Figure 12 yes Figure 9 A cross-sectional view of “EE” at a horizontal position; Figure 13 yes Figure 9 A cross-sectional view at the horizontal position of “FF”; Figure 14 yes Figure 9 A cross-sectional view of “GG” at a horizontal position; Figure 15 yes Figure 9 A cross-sectional view of the horizontal position of “HH”; Figure 16 This is a three-dimensional structural schematic diagram of a connecting component in Embodiment 1; Figure 17 This is a three-dimensional structural diagram of the two connecting components in Embodiment 1 from another direction; Figure 18 This is a side view of the screw assembly in Embodiment 1; Figure 19 yes Figure 18 Top view; Figure 20 This is a three-dimensional structural diagram of the first screw and the second lug of the screw assembly in Embodiment 1; Figure 21 This is a side view of the tensioning component in Embodiment 1 (in its unassembled state); Figure 22 This is a side view of the first sleeve in Embodiment 2; Figure 23 This is a vertical sectional view of the two connecting components in Embodiment 2 (the cutting position is the same as the "AA" position in Embodiment 1). Figure 24 This is a vertical sectional view of the two connecting parts in Embodiment 3 (the cutting position is the same as the "AA" position in Embodiment 1).

[0020] In the attached diagram: 1. First sleeve; 11. First lug; 12. First corrugated part; 2. Connecting component; 21. First hole; 22. Second hole; 23. Second corrugated part; 24. First cover plate; 25. Second cover plate; 26. Support beam; 3. Screw assembly; 31. First screw; 32. Second lug; 33. Washer; 34. Locking nut; 4. Tensioning assembly; 41. Second sleeve; 42. Second screw; 43. Third sleeve; 5. First reinforcing bar; 6. Second reinforcing bar. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0022] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," and "fitting," 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In the description of this specification, references to terms such as "embodiment" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0025] Example 1 This embodiment is a first embodiment of a connector, such as... Figure 1 and Figure 2 As shown, it includes a first sleeve 1, a screw assembly 3, a tensioning assembly 4, and two connecting parts 2. The connecting parts are used to connect the reinforcing bars of two precast concrete components, one of which has a first reinforcing bar 5 and the other has a second reinforcing bar 6. The first sleeve 1 is used to thread a connection with the first reinforcing bar 5.

[0026] like Figure 6-17 As shown, the connecting component 2 has a first hole 21 and a second hole 22, and the inner wall of the connecting component 2 is provided with a second corrugated part 23, a first cover plate 24, a second cover plate 25, and a supporting crossbeam 26. Figure 3-5As shown, the outer wall of the first sleeve 1 is provided with two first lugs 11 corresponding to the first hole 21 and a first corrugated part 12 corresponding to the second corrugated part 23. The support beam 26 is located on the side of the second hole 22 near the screw assembly 3, and the support beam 26 is used to support the second lug 32.

[0027] like Figure 18-20 As shown, the screw assembly 3 includes a first screw 31, a second lug 32, a washer 33 fitted outside the first screw 31, and a locking nut 34 threadedly connected to the first screw 31. The second lug 32 is located at one end of the first screw 31 near the first sleeve 1, and the washer 33 is located between the locking nut 34 and the connecting component 2.

[0028] like Figure 21 As shown, the tensioning assembly 4 includes a second sleeve 41, a second screw 42 and a third sleeve 43. The two ends of the second screw 42 are threaded to the second sleeve 41 and the third sleeve 43 respectively. The second sleeve 41 is threaded to the first screw 31, and the third sleeve 43 is used to thread to the second reinforcing bar 6.

[0029] In this embodiment, the second screw 42 is a double-threaded rod with left-hand and right-hand threads respectively, also known as a left-hand and right-hand threaded screw or a forward and reverse threaded screw. The internal threads of the second sleeve 41 and the third sleeve 43 have opposite directions and mesh with the threads of the second screw 42.

[0030] like Figure 1 As shown, when the connecting component 2 is installed on the outer wall of the first sleeve 1, the first lug 11 is inserted into the first hole 21, the second lug 32 extends into the second hole 22, the first corrugated part 12 and the second corrugated part 23 engage with each other, the first cover plate 24 abuts against the end of the first sleeve 1 away from the screw assembly 3, the second cover plate 25 abuts against the end of the first sleeve 1 near the screw assembly 3, and the net distance between the first cover plate 24 and the second cover plate 25 is the same as the height of the first sleeve 1.

[0031] The size of the second lug 32 is smaller than the size of the second hole 22. More specifically, when the connector is in an untensioned state, the second lug 32 is movably connected to the second hole 22. There is a first adjustment distance between the outer wall of the first screw 31 and the inner wall of the connecting component 2, and a second adjustment distance between the second lug 32 and the inner wall of the second hole 22, so that the first screw 31 can translate and / or rotate within the connecting component 2. There are three possibilities: before the tensioning assembly 4 is tightened, the second lug 32 can only be adjusted by translation, can only be adjusted by rotation, or can be adjusted by both translation and rotation simultaneously.

[0032] For example, when there is a small deviation in the length of the first reinforcing bar 5 and the second reinforcing bar 6 of the precast component and / or in the alignment, the first reinforcing bar 5 and the second reinforcing bar 6 can still be easily connected by the translation and / or rotation of the first screw 31, which has good fault tolerance for component prefabrication and construction.

[0033] In this embodiment, both the second hanging ear 32 and the second hole 22 are rectangles with different cross-sectional sizes. This does not hinder the rotation of the second hanging ear 32, and even after tightening, it will not result in only line contact between the second hanging ear 32 and the supporting beam 26. This is because, in actual construction, mortar is applied to the supporting beam 26 before tightening, which fills the gap between the second hanging ear 32 and the supporting beam 26. Furthermore, the cross-sections of the second hole 22 and the second hanging ear 32 are not limited to rectangles; they can also be circular, arc-shaped, etc.

[0034] In this embodiment, the two connecting parts 2 are completely symmetrical. However, the present invention does not require that different connecting parts 2 be symmetrically arranged, nor does it limit the number of connecting parts 2. Three, four, etc. can be set according to actual needs.

[0035] The present invention does not require that the first cover plate 24 and the second cover plate 25 be provided or be provided simultaneously. When it is necessary to enhance the tensile connection between the first sleeve 1 and the connecting component 2, the first cover plate 24 is provided; when it is necessary to enhance the pressure connection between the first sleeve 1 and the connecting component 2, the second cover plate 25 is provided.

[0036] The working principle of this embodiment is as follows: When connecting precast concrete components, the first lug 11 of the first sleeve 1 is inserted into the first hole 21 of the connecting component 2, and the second lug 32 of the screw assembly 3 is inserted into the second hole 22 to complete the assembly of the connecting component. Then, the first sleeve 1 is screwed into the first reinforcing bar 5 of a precast concrete component, and the second sleeve 41 and the third sleeve 43 are screwed into the first screw 31 and the second reinforcing bar 6 respectively. Then, the second screw 42 is screwed into the second sleeve 41 and the third sleeve 43 at the same time to complete the pre-connection. Then, the position and direction of the first screw 31 are adjusted to accommodate construction errors. Then, by rotating the second screw 42, the distance between the second sleeve 41 and the third sleeve 43 can be shortened, thereby tightening the entire connecting component. Then, the locking nut 34 is rotated to drive the washer 33 to press the end of the connecting component 2, locking all the connecting components 2, thereby completing the connection of the precast concrete component. Then, grout will be poured in the connecting section, and after the grout solidifies, it will cover the entire connecting section.

[0037] In this embodiment, the connection between the connecting component 2 and the first sleeve 1 and the screw assembly 3 is guaranteed by three factors: First, the first lug 11 of the first sleeve 1 extends into the first hole 21, and the two are connected by a tenon and mortise joint to transmit force; second, the first corrugated part 12 of the first sleeve 1 and the second corrugated part 23 of the connecting component 2 are interlocked to transmit force; third, the first cover plate 24 and the second cover plate 25 of the connecting component 2 are inserted into both ends of the first sleeve 1, and the force is transmitted through the nested connection between the first sleeve 1 and the connecting component 2.

[0038] The force transmission method for the first reinforcing bar 5 and the second reinforcing bar 6 is as follows: The second lug 32 of the first screw 31 extends into the second hole 22 of the connecting component 2. When tightened, the second lug 32 is supported on the support beam 26 of the connecting component 2, thus transmitting the tension of the first screw 31 to the connecting component 2, thereby realizing the transmission of reinforcing bar tension. After the connecting component is tightened, the locking nut 34 is tightened, so that it and the washer 33 press together against the end of the connecting component 2. Therefore, the pressure of the first screw 31 can be transmitted to the connecting component 2 through the locking nut 34, thereby realizing the transmission of reinforcing bar pressure.

[0039] The beneficial effects of this embodiment are as follows: Compared to existing technologies, this solution uses a split connecting component 2 instead of the original one-piece design, resulting in lower costs and a smaller footprint. Mechanical connection replaces welding, facilitating rapid installation. The connection method is an exposed connection, allowing for quality inspection. Since the size of the second lug 32 is smaller than the size of the second hole 22, even with errors in prefabrication and construction, the exposed ribs of the prefabricated component can still be easily connected, offering better fault tolerance. The first lug 11 and the connecting component 2 are connected via mortise and tenon joints to achieve force transmission, resulting in a good connection effect. The interlocking between the first corrugated part 12 and the second corrugated part 23 enhances the connection strength of the connector. The first cover plate 24 and the second cover plate 25 respectively support the two ends of the first sleeve 1, further enhancing the connection strength and facilitating the positioning of the first sleeve 1.

[0040] Example 2 This embodiment is a second embodiment of a connector. This embodiment is similar to the first embodiment, except that, as shown in the example... Figure 22-23 As shown, the outer wall of the first sleeve 1 does not have a first corrugated part 12, and the inner wall of the connecting component 2 does not have a second corrugated part 23.

[0041] The purpose of eliminating the corrugations in this embodiment is to reduce the production cost of the connectors. It is applicable to situations where the first sleeve 1 and the connecting component 2 do not use corrugated interlocking connections and the connection strength between the two is sufficient.

[0042] The remaining working principles of this embodiment are the same as those of Embodiment 1.

[0043] Example 3 This embodiment is a third embodiment of a connector. This embodiment is similar to embodiment two, except that, as shown in the following... Figure 24 As shown, the connecting component 2 is not provided with a first cover plate 24 and a second cover plate 25.

[0044] The purpose of omitting the first cover plate 24 and the second cover plate 25 in this embodiment is to reduce the production cost of the connector. It is applicable when the first sleeve 1 and the connecting component 2 do not use a corrugated interlocking connection and do not have a nested connection with the first cover plate 24 and the second cover plate 25, and the connection strength between the two is still sufficient. The rest of the working principle of this embodiment is the same as that of Embodiment 2.

[0045] Regarding the three connection methods between the first sleeve 1 and the connecting component 2: the first sleeve 1 is mortised and tenoned with the connecting component 2 via the first lug 11; the first sleeve 1 and the connecting component 2 are connected via corrugated interlocking; and the first sleeve 1 and the connecting component 2 are nested together via the first cover plate 24 and the second cover plate 25. In other embodiments, one or more of these three methods can be combined, as long as the connection strength requirements are met and the cost of the connector is minimized. The connection methods in Embodiments 1, 2, and 3 belong to one of these combinations.

[0046] Example 4 This embodiment is a fourth embodiment of a connector. This embodiment is similar to the first embodiment, except that the tensioning assembly 4 includes a second sleeve 41 and a second screw 42. The second screw 42 is a double-threaded rod with left-hand and right-hand threads respectively. Its two ends are threadedly connected to the second sleeve 41 and the first sleeve 1 respectively. The internal threads of the second sleeve 41 and the first sleeve 1 are opposite in direction and mesh with the threads of the second screw 42. The tensioning assembly 4 is used to tension the first reinforcing bar 5 and the first sleeve 1. The second sleeve 41 is threadedly connected to the first reinforcing bar 5.

[0047] Compared to Embodiment 1, the installation position of the tensioning component 4 differs in this embodiment. In Embodiment 1, the tensioning component 4 is installed between the first screw 31 and the second reinforcing bar 6, while in this embodiment, the tensioning component 4 is installed between the first reinforcing bar 5 and the first sleeve 1. In this embodiment, the tensioning effect can also be achieved by rotating the second screw 42. The remaining working principles of this embodiment are the same as in Embodiment 1.

[0048] Example 5 An embodiment of a rebar connection method, based on the connector described in any one of embodiments one to three, includes the following steps: S1: Insert the first hook 11 into the first hole 21 of each connecting component 2, and at the same time insert the second hook 32 into the second hole 22 of each connecting component 2; S2: Screw the first sleeve 1 into the first reinforcing bar 5, and screw the second sleeve 41 and the third sleeve 43 into the first screw 31 and the second reinforcing bar 6 respectively; S3: Screw the second screw 42 into the second sleeve 41 and the third sleeve 43 simultaneously for pre-connection; S4: Apply high-strength mortar to the contact surface between the second lug 32 and the connecting component 2; S5: Continue to screw the second screw 42 into the second sleeve 41 and the third sleeve 43 until the components of the connector are tightened; S6: Tighten the locking nut 34 to press the locking nut and washer 33 against the end of the connecting part 2.

[0049] The technology presented in this application can be used for the connection of steel bars in precast components. It is convenient to construct, reliable in quality, occupies little space, and has good tolerance for errors in the precasting and construction stages. It has significant advantages over existing technologies.

[0050] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0051] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make various variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A connector, characterized in that, It includes a first sleeve (1), a screw assembly (3), and at least two connecting parts (2); the connecting parts are used to connect the first reinforcing bar (5) and the second reinforcing bar (6); The connecting component (2) is installed on the outer wall of the first sleeve (1) and has a second hole (22). The screw assembly (3) includes a first screw (31) and a second lug (32). The second lug (32) is located at one end of the first screw (31) near the first sleeve (1). The size of the second lug (32) is smaller than the size of the second hole (22). When the connecting component (2) is installed on the outer wall of the first sleeve (1), the second lug (32) extends into the second hole (22). There is a first adjustment distance between the outer wall of the first screw (31) and the inner wall of the connecting component (2), and a second adjustment distance between the second lug (32) and the inner wall of the second hole (22), so that the first screw (31) can translate and / or rotate within the connecting component (2) before the connector is tightened.

2. A connector according to claim 1, characterized in that, The outer wall of the first sleeve (1) is also provided with at least two first lugs (11), and the connecting component (2) is provided with a first hole (21); when the connecting component (2) is installed on the outer wall of the first sleeve (1), the first lugs (11) are inserted into the first hole (21).

3. A connector according to claim 1, characterized in that, The outer wall of the first sleeve (1) is also provided with a first corrugated part (12), and the inner wall of the connecting part (2) is provided with a second corrugated part (23). When the connecting part (2) is installed on the outer wall of the first sleeve (1), the first corrugated part (12) and the second corrugated part (23) engage with each other.

4. A connector according to claim 1, characterized in that, The connecting component (2) is also provided with a first cover plate (24) and / or a second cover plate (25); when the connecting component (2) is installed on the outer wall of the first sleeve (1), the first cover plate (24) abuts against the end of the first sleeve (1) away from the screw assembly (3), and the second cover plate (25) abuts against the end of the first sleeve (1) near the screw assembly (3).

5. A connector according to claim 1, characterized in that, The connecting component (2) is also provided with a support beam (26), which is located on the side of the second hole (22) near the screw assembly (3) and is used to support the second lug (32).

6. A connector according to claim 1, characterized in that, The screw assembly (3) further includes a washer (33) fitted outside the first screw (31) and a locking nut (34) threadedly connected to the first screw (31). The washer (33) is located between the locking nut (34) and the connecting member (2). The locking nut (34) is used to drive the washer (33) to press the connecting member (2).

7. A connector according to claim 1, characterized in that, It also includes a tensioning assembly (4); the tensioning assembly (4) includes a second sleeve (41), a second screw (42) and a third sleeve (43); the second screw (42) is a double-ended threaded rod with left-hand and right-hand threads respectively, and its two ends are threadedly connected to the second sleeve (41) and the third sleeve (43) respectively; the internal threads of the second sleeve (41) and the third sleeve (43) are opposite in direction and mesh with the threads of the second screw (42).

8. A connector according to claim 7, characterized in that, One end of the tensioning assembly (4) is connected to the first screw (31), and the other end is connected to the second reinforcing bar (6); the tensioning assembly (4) is used to tension the first screw (31) and the second reinforcing bar (6); the second sleeve (41) is threadedly connected to the first screw (31), and the third sleeve (43) is threadedly connected to the second reinforcing bar (6).

9. A connector according to claim 1, characterized in that, It also includes a tensioning assembly (4); the tensioning assembly (4) includes a second sleeve (41) and a second screw (42); the second screw (42) is a double-ended threaded rod with left-hand and right-hand threads respectively, and its two ends are threadedly connected to the second sleeve (41) and the first sleeve (1) respectively; the internal threads of the second sleeve (41) and the first sleeve (1) are opposite in direction and mesh with the threads of the second screw (42), the tensioning assembly (4) is used to tension the first steel bar (5) and the first sleeve (1), and the second sleeve (41) is threadedly connected to the first steel bar (5).

10. A method for connecting reinforcing bars, based on the connector according to any one of claims 1-8, characterized in that, The method includes the following steps: S1: Insert the first hook (11) into the first hole (21) of each connecting part (2), and at the same time insert the second hook (32) into the second hole (22) of each connecting part (2); S2: Screw the first sleeve (1) into the first reinforcing bar (5), and screw the second sleeve (41) and the third sleeve (43) into the first screw (31) and the second reinforcing bar (6) respectively; S3: Screw the second screw (42) into the second sleeve (41) and the third sleeve (43) at the same time to perform pre-connection; S4: Apply high-strength mortar to the contact surface between the second lug (32) and the connecting part (2); S5: Continue to screw the second screw (42) into the second sleeve (41) and the third sleeve (43) until the components of the connector are tightened; S6: Tighten the locking nut (34) to press the locking nut (34) and the washer (33) against the end of the connecting part (2).

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