Reinforcing steel bar connecting device and process for highway bridge construction

Abstract

The invention relates to the field of reinforcing steel bar mechanical connection, in particular to a reinforcing steel bar connecting device and process for highway bridge construction, and the reinforcing steel bar connecting device for highway bridge construction comprises an unlocking mechanism. The unlocking mechanism is used for limiting the rotating sleeve to drive the clamping block to move to the locking position before the reinforcing steel bars are inserted into the positioning channel and releasing limitation on the rotating sleeve after the reinforcing steel bars are inserted into the positioning channel, so that the rotating sleeve can drive the clamping block to lock the reinforcing steel bars, and therefore axial displacement of the two sections of reinforcing steel bars after connection is completed is prevented. The steel bar arrangement in the highway bridge structure meets the design requirement, and the stress stability of the joint of the two sections of steel bars is improved.

Description

Technical Field

[0001] This invention relates to the field of mechanical connection of reinforcing bars, and in particular to a device and process for connecting reinforcing bars in highway bridge construction. Background Technology

[0002] The flexible self-locking rebar splice quick connector is a high-efficiency device used in the construction industry for rebar connection. It is mainly used for splicing rebar in building structures and is widely used in large-scale projects such as high-rise buildings, bridges, and tunnels. It is also suitable for environments where welding two sections of rebar is difficult, such as underwater engineering or construction in confined spaces. The flexible self-locking rebar splice quick connector includes an outer sleeve, an inner locking core, a compression spring, and anti-slip clips. The outer sleeve is a hollow cylinder with a guide cone surface on its inner wall. The inner locking core is fitted inside the outer sleeve, corresponding to the inserted end of the rebar. The compression spring is placed between the inner locking core and the end of the outer sleeve. The anti-slip clips are embedded in the inner wall of the inner locking core and have teeth that match the rebar ribs. In use, the ends of the two rebars to be connected are inserted into the two ends of the outer sleeve respectively. Each rebar pushes the inner locking core to compress the spring. The anti-slip clips contract radially under the action of the guide cone surface, locking the rebar ribs. The spring rebounds, returning the inner locking core to its original position, achieving self-locking and completing the connection.

[0003] However, in the elastic self-locking rebar splice quick connector, the initial elastic force of the compression spring inside the outer sleeve does not match the radial contraction stroke of the anti-slip clip. When each rebar is inserted, it can only push the inner locking core to compress the spring, causing the anti-slip clip to initially contact the rebar rib, but it does not reach the contraction amount required for complete locking. The rebar needs to be pulled outward to drive the inner locking core to move slightly, allowing the anti-slip clip to further contract along the guide cone surface of the outer sleeve to meet the locking condition. This will lead to a decrease in the dimensional accuracy of the axial position after the two rebars are connected, affecting the accuracy of the rebar arrangement in the building structure; it may also cause uneven force transmission at the rebar joint, reducing the load-bearing stability of the connection part and posing a hidden danger to the safety of the engineering structure. Summary of the Invention

[0004] Therefore, it is necessary to provide a rebar connection device for highway bridge construction to address the problem that existing elastic self-locking rebar connection sleeve quick couplings cause gaps between two rebar sections under tensile or compressive loads, resulting in dimensional changes in the axial position of the rebar.

[0005] The above objectives are achieved through the following technical solutions: A steel reinforcement connection device for highway bridge construction, comprising: The positioning sleeve has a positioning channel, and the ends of two steel bars can be inserted into the positioning channel at the same time.

[0006] The locking mechanism comprises two sets, each set used to fix the end of a rebar within the positioning channel. Each locking mechanism includes a rotating sleeve, multiple clamping blocks, and a first elastic element. One end of the rotating sleeve is threadedly connected to one end of the positioning sleeve. The multiple clamping blocks are located inside the rotating sleeve. The elastic force of the first elastic element always keeps the clamping blocks and the positioning sleeve away from each other. After the end of the rebar is inserted into the positioning channel, rotating the rotating sleeve drives the multiple clamping blocks to lock the rebar.

[0007] Before the end of the reinforcing bar is inserted into the positioning channel, the unlocking mechanism restricts the rotating sleeve from driving the clamping block to move to the locking position; after the end of the reinforcing bar is inserted into the positioning channel, the unlocking mechanism releases the restriction on the rotating sleeve, allowing the rotating sleeve to rotate and drive the clamping block to move to the locking position to lock the reinforcing bar.

[0008] Furthermore, the unlocking mechanism includes a stop pin, which is slidably connected to the positioning sleeve perpendicular to the axis of the positioning sleeve. When the reinforcing bar is not inserted into the positioning channel, one end of the stop pin is located outside the positioning sleeve to restrict the rotating sleeve from driving the clamping block to move to the locking position. After the reinforcing bar is inserted into the positioning channel, the stop pin is located inside the positioning sleeve so that the rotating sleeve can drive the clamping block to move to the locking position.

[0009] Furthermore, a second elastic element is provided between the stop pin and the positioning sleeve, and the elastic force of the second elastic element always causes one end of the stop pin to be located outside the positioning sleeve.

[0010] Furthermore, the unlocking mechanism also includes a drive rod, the diameter of the middle part of the drive rod being smaller than the diameter of the end part; the stop pin is provided with a sliding hole, and the drive rod slides in the sliding hole to drive the stop pin to slide into the positioning sleeve; when the reinforcing bar is not inserted into the positioning channel, the middle part of the drive rod is located in the sliding hole, and after the reinforcing bar is inserted into the positioning channel, the end part of the drive rod is located in the sliding hole.

[0011] The positioning sleeve has an inclined groove inside, and the driving rod is slidably connected to the positioning sleeve within the inclined groove. During the process of inserting the reinforcing bar into the positioning channel, the reinforcing bar can drive the driving rod to slide within the inclined groove and the sliding hole.

[0012] Furthermore, the sliding hole has a narrow diameter end and a wide diameter end perpendicular to the axial direction of the positioning sleeve. The wide diameter end is farther away from the axis of the positioning sleeve than the narrow diameter end. The inner wall diameter of the narrow diameter end is equal to the middle diameter of the drive rod, and the inner wall diameter of the wide diameter end is equal to the end diameter of the drive rod.

[0013] Furthermore, the first elastic element is configured as a spring sheet, one end of which is fixedly provided with an upper reverse tooth, and the clamping block is provided with a reverse tooth groove at one end near the positioning sleeve. The upper reverse tooth can be engaged in the reverse tooth groove, and the other end of the spring sheet is fixedly connected to the positioning sleeve. During the process of the rotating sleeve driving the clamping block to lock the reinforcing bar in the forward rotation, the upper reverse tooth can disengage from the reverse tooth groove. When the clamping block locks the reinforcing bar, the upper reverse tooth and the reverse tooth groove are engaged to restrict the rotating sleeve from rotating in the reverse direction.

[0014] Furthermore, a first limiting block and a second limiting block are fixedly provided at both ends of the spring piece, respectively. The first limiting block and the second limiting block are engaged with each other, and the first limiting block and the second limiting block are used to limit the relative deflection of the two ends of the spring piece.

[0015] Furthermore, the corner of the spring piece can clamp the reinforcing bar, and the corner of the spring piece is bent toward the positioning sleeve.

[0016] Furthermore, the corner of the spring sheet can clamp the reinforcing bar, and the corner of the spring sheet is bent toward the clamping block.

[0017] A steel bar connection process for highway bridge construction, applied to the aforementioned steel bar connection device for highway bridge construction, includes the following steps: S100, pre-process the ends of the two sections of steel bars to be connected, ensuring that their outer surfaces are clean and free of rust, and check whether their diameter meets the requirements for insertion into the positioning channel.

[0018] S200, insert the end of one section of the reinforcing bar into the positioning channel.

[0019] S300, release the restriction of the unlocking mechanism on the rotating sleeve.

[0020] S400, rotate the rotating sleeve to drive the plurality of clamping blocks to move to the locking position, and lock the reinforcing bar under the elastic force of the first elastic element.

[0021] S500, repeat steps S200, S300 and S400 to insert and lock another section of steel bar from the other end of the positioning sleeve, thus completing the connection of the two sections of steel bar.

[0022] The beneficial effects of this invention are: This invention provides a rebar connection device and process for highway bridge construction. The rebar connection device includes an unlocking mechanism. Before the rebar is inserted into the positioning channel, the unlocking mechanism restricts the rotating sleeve from driving the clamping block to the locking position. After the rebar is inserted into the positioning channel, the unlocking mechanism releases the restriction on the rotating sleeve, ensuring that the clamping block's locking action can only occur after the rebar is fully inserted into the positioning channel. This ensures the dimensional accuracy of the two rebar segments in the axial position after connection, improves the stress stability of the connection point, and provides reliable protection for the safety of the highway bridge structure. Attached Figure Description

[0023] Figure 1 A structural schematic diagram of a steel bar connection device for highway bridge construction provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a steel bar connection device for highway bridge construction, showing the clamping block in the locking position, according to an embodiment of the present invention. Figure 3 for Figure 1 Side view of the structure shown; Figure 4 for Figure 2 Side view of the structure shown; Figure 5 for Figure 3 A cross-sectional view along the AA direction; Figure 6 for Figure 4 Cross-sectional view along the BB direction; Figure 7 for Figure 5 A magnified view of a section at point C; Figure 8 for Figure 6 A magnified view of a section at point D; Figure 9 An exploded view of a steel reinforcement connection device for highway bridge construction provided in an embodiment of the present invention; Figure 10 A schematic diagram of the structure of a stop pin in a steel bar connection device for highway bridge construction provided by an embodiment of the present invention; Figure 11 This invention provides a schematic diagram of the structure of multiple clamping blocks in a steel reinforcement connection device for highway bridge construction, as provided in an embodiment of the present invention. Figure 12 A schematic diagram of the spring sheet in a steel bar connection device for highway bridge construction provided by an embodiment of the present invention; Figure 13 for Figure 12 A schematic diagram of the structure in which the spring clip bends toward the positioning sleeve; Figure 14 for Figure 12A schematic diagram of the structure in which the spring clip bends toward the clamping block.

[0024] in: 110. Rotating sleeve; 120. Clamping block; 121. First reverse tooth groove; 130. Spring piece; 131. Upper reverse tooth; 132. First limiting block; 133. Second limiting block; 210. Positioning sleeve; 310. Stop pin; 320. Second elastic element; 330. Drive rod. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0026] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They 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, and therefore should not be construed as limiting the invention.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] The following reference Figures 1 to 14 This invention describes a steel reinforcement connection device for highway bridge construction provided in an embodiment of the invention.

[0029] The steel bar connection device for highway bridge construction provided in this embodiment of the invention includes a positioning sleeve 210 and two sets of locking mechanisms.

[0030] The positioning sleeve 210 is a hollow cylindrical structure with positioning channels inside. When connecting two sections of reinforcing bars, the two sections of reinforcing bars are inserted into the positioning channels from both ends of the positioning sleeve 210. The positioning sleeve 210 is used to provide centering and positioning for the two sections of reinforcing bars, ensuring that the two sections of reinforcing bars are on the same axis, thereby ensuring the stress stability of the connection part of the two sections of reinforcing bars in the highway bridge structure.

[0031] Each locking mechanism includes a rotating sleeve 110, multiple clamping blocks 120, and a first elastic element. The rotating sleeve 110 has a cylindrical structure with internal threads on its inner wall. The outer walls at both ends of the positioning sleeve 210 have external threads that mate with the internal threads. The rotating sleeve 110 and the positioning sleeve 210 are coaxially connected by threads. The multiple clamping blocks 120 are all block structures with external conical surfaces. The multiple clamping blocks 120 are evenly distributed circumferentially inside the rotating sleeve 110. The outer walls of the multiple clamping blocks 120 are in contact with the inner wall of the rotating sleeve 110 and can move axially within the rotating sleeve 110. The elastic force of the first elastic element always causes the clamping blocks 120 and the positioning sleeve 210 to move away from each other or tend to move away from each other.

[0032] As the reinforcing bar is inserted into the positioning channel from one end of the positioning sleeve 210, the outer wall of the reinforcing bar pushes multiple clamping blocks 120 toward the positioning sleeve 210, compressing the first elastic element. After the reinforcing bar is inserted into the positioning channel, the elastic force of the first elastic element pushes the clamping blocks 120 away from the positioning sleeve 210, using friction and clamping force to lock the reinforcing bar, preventing it from loosening or coming out, and ensuring a firm connection.

[0033] When assembling the rebar connection device for highway bridge construction, multiple clamping blocks 120 and the first elastic element are sequentially placed inside the rotating sleeve 110, ensuring that the outer walls of the clamping blocks 120 are in contact with the inner wall of the rotating sleeve 110. Then, the rotating sleeve 110 is screwed to one end of the positioning sleeve 210 until it reaches the middle position, completing the assembly of one locking mechanism. Another locking mechanism is assembled in the same manner, with the rotating sleeve 110 of the other locking mechanism screwed to the other end of the positioning sleeve 210, completing the assembly of the connection device.

[0034] However, when the reinforcing bar is inserted into the positioning channel, the reaction force generated by the compression of the first elastic element can only push the outer wall of the multiple clamping blocks 120 to initially fit with the inner wall of the rotating sleeve 110, failing to allow the inner hole formed by the multiple clamping blocks 120 to fully lock the shrinkage of the reinforcing bar. Only by pulling the reinforcing bar outward to drive the multiple clamping blocks 120 to move slightly axially, increasing the clamping depth between the inner wall of the multiple clamping blocks 120 and the outer wall of the reinforcing bar, can locking be achieved. This will cause uncontrollable deviations in the axial position of the two sections of reinforcing bar, compromising the accuracy of the reinforcing bar arrangement in highway bridge construction and affecting the consistency of the structural stress design. Based on this, the reinforcing bar connection device for highway bridge construction provided in this embodiment of the invention also includes an unlocking mechanism. Before the end of the reinforcing bar is inserted into the positioning channel, the unlocking mechanism restricts the rotating sleeve 110 from driving the multiple clamping blocks 120 to move to the locking position; after the end of the reinforcing bar is inserted into the positioning channel, the unlocking mechanism releases the restriction on the rotating sleeve 110, allowing the rotating sleeve 110 to rotate and drive the multiple clamping blocks 120 to move to the locking position to lock the reinforcing bar.

[0035] Specifically, the unlocking mechanism includes a stop pin 310, a second elastic element 320, and a drive rod 330.

[0036] The stop pin 310 has a columnar structure and forms a sliding connection with the positioning sleeve 210. Its sliding direction is perpendicular to the axis of the positioning sleeve 210.

[0037] The second elastic element 320 is installed between the stop pin 310 and the positioning sleeve 210. The elastic force of the second elastic element 320 always makes one end of the stop pin 310 located outside the positioning sleeve 210.

[0038] The drive rod 330 is a variable-diameter cylindrical structure, with its central diameter smaller than its end diameter. The stop pin 310 has a through sliding hole, which is perpendicular to the axis of the positioning sleeve 210 and has a narrow-diameter end and a wide-diameter end. The inner walls of the narrow-diameter end and the wide-diameter end are smoothly connected, and the wide-diameter end is positioned further away from the axis of the positioning sleeve 210 than the narrow-diameter end, allowing the drive rod 330 to slide smoothly within the sliding hole. The inner diameter of the narrow-diameter end is equal to the central diameter of the drive rod 330, and the inner diameter of the wide-diameter end is equal to the end diameter of the drive rod 330. The positioning sleeve 210 has a slanted groove, the extension direction of which forms a predetermined angle with the axis of the positioning sleeve 210. The drive rod 330 can be completely placed within the slanted groove and simultaneously passes through the sliding hole of the stop pin 310. The sliding of the drive rod 330 within the slanted groove drives the stop pin 310 to slide on the positioning sleeve 210.

[0039] When the reinforcing bar is not inserted into the positioning channel, one end of the drive rod 330 is located outside the inclined groove and inside the positioning channel. At this time, the middle part of the drive rod 330 is located at the narrow diameter end of the sliding hole. Due to the restriction of the narrow diameter end of the sliding hole, the drive rod 330 cannot slide along the inclined groove. At the same time, the elastic force of the second elastic element 320 pushes the stop pin 310 to slide away from the axis of the positioning sleeve 210, so that one end of the stop pin 310 extends out of the positioning sleeve 210. This extended part restricts the rotating sleeve 110 from being screwed toward the middle position of the positioning sleeve 210.

[0040] During the insertion of the reinforcing bar into the positioning channel, the outer wall of the end of the reinforcing bar contacts the end of the drive rod 330, driving the drive rod 330 to slide along the inclined groove. As the drive rod 330 slides, its end gradually approaches the narrow diameter end of the sliding hole, and the outer wall of the end of the drive rod 330 generates a thrust on the inner wall of the narrow diameter end of the sliding hole. This thrust overcomes the elastic force of the second elastic element 320, driving the stop pin 310 to slide towards the axis of the positioning sleeve 210, and the drive rod 330 gradually enters the wide diameter end of the sliding hole. When the stop pin 310 is fully retracted into the positioning sleeve 210, the restriction of the stop pin 310 on the rotating sleeve 110 is released. After the reinforcing bar is fully inserted into the positioning channel, rotating the rotating sleeve 110 drives multiple clamping blocks 120 to lock the reinforcing bar.

[0041] Therefore, the unlocking mechanism, through the stop pin 310, the second elastic element 320, and the drive rod 330, allows the reinforcing bar to be inserted into the positioning channel, and then drives multiple clamping blocks 120 to lock the reinforcing bar, preventing axial displacement of the two sections of reinforcing bar after connection, and ensuring that the arrangement of reinforcing bars in the highway bridge structure meets the design requirements.

[0042] It is understood that the second elastic element 320 can be an elastic rubber column, a disc spring, a wave spring, or other structures. These structures can be coaxially sleeved outside the stop pin 310 or embedded in the positioning sleeve 210. However, these structures should always be able to generate an elastic force that keeps one end of the stop pin 310 outside the positioning sleeve 210, ensuring that when the reinforcing bar is not inserted into the positioning channel, one end of the stop pin 310 can stably extend outside the positioning sleeve 210, forming an effective block against the rotation of the rotating sleeve 110.

[0043] In other embodiments, the diameters of the narrow and wide ends of the sliding hole on the stop pin 310 are equal to the diameter of the end of the drive rod 330, so that the difference between the middle diameter and the end diameter of the drive rod 330 can meet the displacement requirements of the stop pin 310. That is, when the end of the drive rod 330 enters the sliding hole, the thrust generated by the diameter difference can just push the stop pin 310 to move completely into the positioning sleeve 210, ensuring that the rotating sleeve 110 can drive the multiple clamping blocks 120 to lock the reinforcing bars smoothly.

[0044] In one embodiment, since the positioning sleeve 210 and the rotating sleeve 110 are locked solely by the friction between their threads, in the construction environment of highway bridges, factors such as vehicle vibration, structural stress deformation, and temperature changes continuously act on the connection between the two sections of reinforcing bars, causing the friction between the threads to decrease. Simultaneously, the threaded connection itself has a small gap, which gradually widens under long-term dynamic loads, further weakening the locking effect. This can easily lead to circumferential loosening of the rotating sleeve 110 and the positioning sleeve 210, causing relative rotation between them, disrupting the clamping force of the multiple clamping blocks 120 on the reinforcing bars, and ultimately resulting in axial displacement of the reinforcing bars or connection failure. Therefore, the first elastic element is set as a spring sheet 130.

[0045] Specifically, the spring piece 130 is an annular sheet structure with a preset elastic deformation capability. The spring piece 130 is located between multiple clamping blocks 120 and the positioning sleeve 210. An upper countertooth 131 is fixedly provided at one end of the spring piece 130 near the multiple clamping blocks 120. The upper countertooth 131 has a protruding structure with an inclined surface and a vertical surface, which together form the tip of the upper countertooth 131, pointing away from the positioning sleeve 210. A first countertooth groove 121 is provided on the wall surface of one end of the multiple clamping blocks 120 near the positioning sleeve 210. The upper countertooth 131 can be embedded in the first countertooth groove 121, forming a snap-fit ​​relationship. The other end of the spring piece 130 is fixedly connected to the wall surface of the positioning sleeve 210 near the multiple clamping blocks 120.

[0046] During the forward rotation of the rotating sleeve 110 driving the multiple clamping blocks 120 to lock the reinforcing bars, the inner wall of the rotating sleeve 110 generates an axial thrust on the multiple clamping blocks 120, pushing them towards the positioning sleeve 210. The movement of the multiple clamping blocks 120 generates axial pressure on the spring piece 130, causing it to undergo elastic compression deformation. Simultaneously, under the action of friction, the multiple clamping blocks 120 rotate synchronously with the rotating sleeve 110. The inner wall of the first inverted groove 121 of the multiple clamping blocks 120 exerts a squeezing force on the upper inverted tooth 131, causing the first inverted groove 121 to slide along the inclined surface of the upper inverted tooth 131 and briefly disengage. As the rotating sleeve 110 continues to rotate, the movement of the multiple clamping blocks 120 repeatedly completes the engagement and disengagement of the first inverted groove 121 and the upper inverted tooth 131.

[0047] When the rotating sleeve 110 drives the multiple clamping blocks 120 to complete the locking of the reinforcing bar, the upper reverse tooth 131 engages again in the first reverse tooth groove 121. At this time, if the rotating sleeve 110 tends to rotate in the opposite direction, that is, rotates away from the positioning sleeve 210, the vertical surface of the upper reverse tooth 131 will abut against the wall of the first reverse tooth groove 121, preventing the wall of the first reverse tooth groove 121 from sliding in the opposite direction. This abutting force is transmitted to the spring piece 130 through the multiple clamping blocks 120. Due to the fixed connection between the spring piece 130 and the positioning sleeve 210, resistance is formed, thereby completely preventing the reverse rotation of the rotating sleeve 110 and ensuring that the clamping force of the multiple clamping blocks 120 on the reinforcing bar is always kept within the preset range.

[0048] It is understandable that the unlocking mechanism can precisely set the turning angle of the rotating sleeve 110 driving multiple clamping blocks 120 to the locking position, so that when the rotating sleeve 110 drives multiple clamping blocks 120 to lock the steel bar, the upper back tooth 131 can accurately engage in the first back tooth groove 121.

[0049] It is understandable that the connection relationship between the spring piece 130 and the multiple clamping blocks 120 and the positioning sleeve 210 can be varied. For example, the spring piece 130 can be fixedly connected to the multiple clamping blocks 120, and a lower countertooth is fixedly provided at the end away from the multiple clamping blocks 120. The lower countertooth has the same structure as the upper countertooth 131, with the tooth tip facing away from the multiple clamping blocks 120. A second countertooth groove is provided at the end of the positioning sleeve 210 near the multiple clamping blocks 120, and the lower countertooth can be embedded in the second countertooth groove. During the process of the rotating sleeve 110 driving the multiple clamping blocks 120 to lock the reinforcing bar in the forward rotation, the rotating sleeve 110 drives the multiple clamping blocks 120 and the spring piece 130 to rotate synchronously, so that the lower countertooth slides along its own inclined surface and disengages from the second countertooth groove. When the multiple clamping blocks 120 have locked the reinforcing bar, if the rotating sleeve 110 shows a tendency to rotate in the opposite direction, the vertical surface of the lower countertooth will abut against the wall of the second countertooth groove, thereby preventing the rotating sleeve 110 from rotating in the opposite direction.

[0050] Furthermore, a first limiting block 132 and a second limiting block 133 are fixedly provided at both ends of the spring piece 130. The first limiting block 132 is a block-shaped groove structure, and the second limiting block 133 is a block-shaped protrusion structure that cooperates with the first limiting block 132. The first limiting block 132 and the second limiting block 133 can form a gapless snap-fit. The first limiting block 132 and the second limiting block 133 are used to limit the deflection of both ends of the spring piece 130 in the axial direction of the positioning sleeve 210. During use, when the rotating sleeve 110 drives multiple clamping blocks 120 to rotate synchronously, the snap-fit ​​relationship between the first limiting block 132 and the second limiting block 133 constrains the deformation direction of the spring piece 130, allowing the spring piece 130 to be stretched or compressed only along the axial direction of the positioning sleeve 210, and limiting the deflection or circumferential torsion of both ends of the spring piece 130.

[0051] In one embodiment, the connection between the two steel bars needs to withstand dynamic loads for a long time. If the steel bar and the connecting device rely solely on the clamping force of multiple clamping blocks 120, when the clamping force decreases due to long-term use, the steel bar is prone to axial sliding in the direction away from the positioning sleeve 210, affecting the force transmission stability of the structure. Based on this, in order to increase the clamping force on the steel bar, the corner of the spring piece 130 can clamp the steel bar, and the corner of the spring piece 130 is bent towards the positioning sleeve 210.

[0052] When the reinforcing bar is not inserted into the positioning channel, there is a preset gap between the corner of the spring piece 130 and the positioning channel to ensure that the reinforcing bar can be smoothly inserted into the positioning channel. After the reinforcing bar is inserted into the positioning channel, the corner of the spring piece 130 makes initial contact with the outer wall of the reinforcing bar. When the rotating sleeve 110 drives the multiple clamping blocks 120 to lock the reinforcing bar, the movement of the multiple clamping blocks 120 will generate axial pressure on the spring piece 130, causing the spring piece 130 to undergo elastic compression deformation, thereby generating pressure on the outer wall of the reinforcing bar at the corner of the spring piece 130. Since the corner of the spring piece 130 extends towards the positioning sleeve 210, the force generated when the spring piece 130 presses the reinforcing bar will prevent the reinforcing bar from moving away from the positioning sleeve 210, ensuring that the two sections of reinforcing bar always maintain the axial position of being inserted in place after connection, reducing the risk of connection failure due to reinforcing bar slippage.

[0053] In one embodiment, since excessive friction between the spring 130 and the reinforcing bar can cause damage to the surface of the reinforcing bar or wear of the spring 130, the corner of the spring 130 is bent towards the multiple clamping blocks 120 to reduce wear. During the process of the reinforcing bar being inserted into the positioning channel and locked, the spring 130 undergoes elastic deformation due to the axial movement of the multiple clamping blocks 120. Because the corner of the spring 130 is bent towards the multiple clamping blocks 120, it is possible to ensure that the spring 130 provides effective clamping force while avoiding damage to the surface of the reinforcing bar due to friction, thus extending the service life of the spring 130.

[0054] The steel reinforcement connection process for highway bridge construction provided in this embodiment of the invention, applied to the steel reinforcement connection device for highway bridge construction in the above embodiment, includes the following steps: S100, Pre-treatment of reinforcing bars to be connected.

[0055] S110, check whether the specifications of the two sections of steel bars to be connected meet the design requirements.

[0056] S120 is used to clean the ends of the reinforcing bars, removing rust, oil, and concrete residue to ensure a clean surface.

[0057] S200, Assembly and pre-setting of the connecting device.

[0058] S210, multiple clamping blocks 120 and spring pieces 130 are installed inside the rotating sleeve 110 to ensure that the outer conical surfaces of the multiple clamping blocks 120 are in contact with the inner wall of the rotating sleeve 110.

[0059] S220, check whether the stop pin 310 extends outside the positioning sleeve 210 under the action of the second elastic element 320, and confirm that the unlocking mechanism is in the initial restricted state.

[0060] S230, screw the assembled rotating sleeve 110 to one end of the positioning sleeve 210.

[0061] S240, repeat steps S210 and S230 to install another set of locking mechanisms at the other end of the positioning sleeve 210.

[0062] S300, insert reinforcing bar.

[0063] S310, insert the end of one of the reinforcing bars into the positioning channel of the positioning sleeve 210.

[0064] S320, push the steel bar until its end contacts the drive rod 330, and trigger the unlocking mechanism.

[0065] S330, confirm that the stop pin 310 retracts into the positioning sleeve 210 under the action of the drive rod 330, releasing the restriction on the rotating sleeve 110.

[0066] S340, repeat steps S310-S330 to insert another rebar into the positioning channel from the other end of the positioning sleeve 210.

[0067] S400, locking operation.

[0068] S410, using a special wrench to turn the rotating sleeve 110, drives multiple clamping blocks 120 to move toward the positioning sleeve 210.

[0069] S420, continuously rotate the sleeve 110 until the multiple clamping blocks 120 completely lock the reinforcing bar.

[0070] S430, confirm that the upper reverse tooth 131 of the spring 130 is engaged with the first reverse tooth groove 121 of the multiple clamping blocks 120 to prevent the rotating sleeve 110 from rotating in the opposite direction.

[0071] S440, repeat steps S410-S430 to lock the rotating sleeve 110 at the other end.

[0072] S500, connecting quality inspection and recording.

[0073] S510, check whether the reinforcing bars are free from axial loosening and circumferential rotation.

[0074] S520, use a torque wrench to check whether the locking torque of the rotating sleeve 110 meets the design requirements.

[0075] S600, Cleanup and Handover.

[0076] S610, clean dirt and oil stains from the surface of the connecting device.

[0077] S620, after confirming that the connection is correct, hand it over to the next process.

[0078] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A steel reinforcement connection device for highway bridge construction, characterized in that, The utility model relates to a positioning sleeve, the positioning sleeve has a positioning channel, the end of two reinforced concretes can be inserted into the positioning channel simultaneously, locking mechanism, locking mechanism is provided with two groups, and each group locking mechanism is used for fixing the end of a reinforced concrete in the positioning channel, locking mechanism includes rotating sleeve, a plurality of clamping blocks and first elastic member, the one end of rotating sleeve is connected with the positioning sleeve through the thread, a plurality of clamping blocks are located in the rotating sleeve, and the elastic force of first elastic member makes clamping block and positioning sleeve away from each other, after the end of reinforced concrete is inserted into the positioning channel, rotating the rotating sleeve can drive a plurality of clamping blocks to lock the reinforced concrete, unlocking mechanism, before the end of reinforced concrete is inserted into the positioning channel, the unlocking mechanism restricts rotating sleeve to drive clamping block to move to the locking position, after the end of reinforced concrete is inserted into the positioning channel, the unlocking mechanism removes the restriction of rotating sleeve, and after rotating, the rotating sleeve can drive clamping block to move to the locking position and lock the reinforced concrete. The unlocking mechanism includes a stop pin that is slidingly connected to the positioning sleeve perpendicular to the axis of the positioning sleeve, when the reinforced concrete is not inserted into the positioning channel, one end of the stop pin is located outside the positioning sleeve to restrict the rotating sleeve from driving the clamping block to move to the locking position, after the reinforced concrete is inserted into the positioning channel, the stop pin is located inside the positioning sleeve to enable the rotating sleeve to drive the clamping block to move to the locking position. A second elastic member is provided between the stop pin and the positioning sleeve, and the elastic force of the second elastic member always makes one end of the stop pin located outside the positioning sleeve. The unlocking mechanism further includes a drive rod, the middle part of the drive rod has a smaller diameter than the end part, a sliding hole is provided on the stop pin, the drive rod slides in the sliding hole to drive the stop pin to slide into the positioning sleeve, when the reinforced concrete is not inserted into the positioning channel, the middle part of the drive rod is located in the sliding hole, after the reinforced concrete is inserted into the positioning channel, the end part of the drive rod is located in the sliding hole. An inclined groove is provided inside the positioning sleeve, the drive rod is slidingly connected to the positioning sleeve in the inclined groove, during the process of inserting the reinforced concrete into the positioning channel, the reinforced concrete can drive the drive rod to slide in the inclined groove and the sliding hole.

2. A reinforcing bar coupling device for highway bridge construction as claimed in claim 1, wherein The sliding hole has a narrow end and a wide end perpendicular to the axis of the positioning sleeve, the wide end is farther away from the axis of the positioning sleeve than the narrow end, the inner wall diameter of the narrow end is equal to the middle part diameter of the drive rod, and the inner wall diameter of the wide end is equal to the end part diameter of the drive rod. ​ 3. A reinforcing bar coupling device for highway bridge construction as claimed in claim 2, wherein ​ 4. A reinforcing bar coupling device for highway bridge construction according to claim 2, wherein ​ ​ 5. A reinforcing bar coupling device for highway bridge construction as claimed in claim 4, wherein ​ 6. A reinforcing bar coupling device for highway bridge construction as defined in claim 1, wherein The first elastic member is provided as an elastic sheet, one end of the elastic sheet is fixedly provided with an upper inverted tooth, the clamping block is provided with an inverted tooth slot at one end close to the positioning sleeve, the upper inverted tooth can be clamped in the inverted tooth slot, and the other end of the elastic sheet is fixedly connected to the positioning sleeve; in the process that the rotating sleeve drives the clamping block to lock the steel bars in a forward rotation, the upper inverted tooth can be disengaged from the inverted tooth slot; when the clamping block locks the steel bars, the upper inverted tooth and the inverted tooth slot are clamped to limit reverse rotation of the rotating sleeve.

7. A reinforcing bar coupling device for highway bridge construction as claimed in claim 6, wherein The two ends of the elastic sheet are respectively fixedly provided with a first limiting block and a second limiting block, the first limiting block and the second limiting block are clamped with each other, and the first limiting block and the second limiting block are used for limiting relative deflection of the two ends of the elastic sheet.

8. A reinforcing bar coupling device for highway bridge construction as claimed in claim 6, wherein The corner of the elastic sheet can clamp the steel bars, and the corner of the elastic sheet is bent towards the positioning sleeve.

9. A reinforcing bar coupling device for highway bridge construction as defined in claim 6, wherein The corner of the elastic sheet can clamp the steel bars, and the corner of the elastic sheet is bent towards the clamping block.

10. A reinforcing bar connecting process for highway bridge construction, applied to the reinforcing bar connecting device for highway bridge construction according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: S100, pretreating end portions of two steel bars to be connected, ensuring that the outer surfaces of the end portions are clean and free of rust, and checking whether the diameters of the end portions meet the requirements of being inserted into the positioning channels; S200, inserting an end portion of one of the steel bars into the positioning channel; S300, releasing the restriction of the unlocking mechanism on the rotating sleeve; S400, rotating the rotating sleeve to drive the plurality of clamping blocks to move to a locking position and lock the steel bars under the elastic force of the first elastic member; S500, repeating steps S200, S300 and S400 to insert and lock the other steel bar from the other end of the positioning sleeve, and completing the connection of the two steel bars.

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