A reinforcing bar pulling connection device

Abstract

The present application relates to the technical field of steel bar connection in tunnel engineering, and particularly relates to a steel bar traction connection device, which comprises a traction pulling unit, the traction pulling unit comprises a first sleeve and a second sleeve, an external sleeve and a first external support frame, the first external support frame is provided with a second external support frame; a pressing mechanism; and a clamping mechanism. The present application can pull and draw the circular main reinforcement and the inverted arch reserved steel bar close to each other in the assembly area enclosed by the first external support frame and the second external support frame, and realizes the fixed connection of the circular main reinforcement and the inverted arch reserved steel bar in the tunnel under the fixed cooperation of the first external support frame and the second external support frame. The present application can also clamp and fix the circular main reinforcement and the inverted arch reserved steel bar of different specifications in the corresponding first sleeve and second sleeve, which not only increases the universal applicability of the device, but also guarantees the clamping stability of the circular main reinforcement and the inverted arch reserved steel bar in the corresponding sleeve, and has good use effect.

Description

Technical Field

[0001] This invention relates to the field of steel bar connection technology in tunnel engineering, and specifically to a steel bar traction connection device. Background Technology

[0002] With the rapid development of high-speed railways and highways in my country, there are more and more tunnel projects, and the quality requirements for tunnel construction are becoming more and more stringent, requiring more and more accurate binding of secondary lining steel bars.

[0003] The secondary lining of a tunnel is a major support structure in mountainous areas with poor surrounding rock, directly affecting the stability and safety of construction and operation. Among the components, the reinforcing steel is of paramount importance in the secondary lining, and effective measures must be taken to improve the construction quality of the secondary lining reinforcement.

[0004] Currently, in the construction of secondary lining reinforcement, the connection between the circumferential main reinforcement and the reserved reinforcement of the invert arch is achieved using extrusion sleeves. When the reinforcement trolley is loading the reinforcement, one side of the extrusion sleeve is first installed on the circumferential reinforcement. Since the circumferential main reinforcement is processed with a certain length exceeding the design length, after the circumferential main reinforcement is pulled into place, the excess length is cut off as needed. After cutting, the extrusion sleeve is then used to connect with the reserved reinforcement of the invert arch. The above-mentioned existing technology not only makes it difficult to control the length of the circumferential main reinforcement, resulting in a large waste of reinforcement, but also reduces construction efficiency due to the length cutting in actual construction, resulting in poor performance.

[0005] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is the closest prior art. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a rebar traction connection device.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a rebar traction connection device, comprising a traction and pulling unit for fixing and connecting a single set of circumferential main bars and invert arch reserved rebars, wherein the traction and pulling unit comprises a first sleeve and a second sleeve respectively sleeved and installed outside the circumferential main bars and the invert arch reserved rebars, and an outer sleeve correspondingly provided outside the first sleeve and the second sleeve, wherein a first outer support frame is provided on one side of the outer side of the two outer sleeves, and a second outer support frame for fixing and connecting the circumferential main bars and the invert arch reserved rebars is provided on the first outer support frame;

[0008] The extrusion mechanism is set on the opposite end faces of the two outer sleeves and is used to extrude from both sides within the closed cavity of the first outer support frame and the second outer support frame to bring the circumferential main reinforcement and the reserved reinforcement of the invert arch closer to each other.

[0009] The clamping mechanism is correspondingly installed inside the first sleeve and the second sleeve to clamp and fix the circumferential main reinforcement and the reserved reinforcement of the invert arch respectively sleeved on the first sleeve and the second sleeve.

[0010] Furthermore, the extrusion mechanism includes a first wedge body correspondingly disposed on the two outer sleeves at opposite end faces, and a second wedge body closely attached to the first wedge body and vertically slotted and slidably installed on the inner side of the first outer support frame. The second wedge body is provided with a lead screw rotatably connected to the upper and lower ends of the first outer support frame.

[0011] Furthermore, several first springs are provided between the two outer sleeves to support the two outer sleeves as they move closer or further apart in the horizontal direction.

[0012] Furthermore, the clamping mechanism includes two sets of clamping arc plates coaxially disposed inside the first sleeve and the second sleeve, and a translation component correspondingly disposed inside the outer sleeve and pushing one set of the clamping arc plates toward each other or apart on the horizontal plane.

[0013] Furthermore, the translation component includes a first rack respectively disposed on the opposite end faces of a set of two clamping arc plates, a double gear correspondingly meshing on one side of the first rack, an internal gear ring externally meshing on the upper tooth block portion of the double gear, a connecting rod disposed on the double gear, a gear disposed at the lower end of the connecting rod, and a second rack meshing on one side of the gear.

[0014] Furthermore, a linkage mechanism connected to the lead screw drive is horizontally arranged on the internal gear ring;

[0015] The linkage mechanism includes a pulley sleeved on the lead screw, a transmission belt mounted on the pulley and wound around the internal gear ring for transmission, and two tensioning pulleys vertically arranged on the center connection line between the pulley and the internal gear ring, which are wound around the belt surface of the transmission belt. Each of the two tensioning pulleys is provided with a wheel axle that is horizontally slidably limited within the upper surface of the first outer support frame, and the lower ends of the two wheel axles are correspondingly provided with support seats connected by a second spring.

[0016] Furthermore, the upper and lower end faces of the second outer support frame are provided with slots adapted for the lead screw to pass through.

[0017] Furthermore, nuts that are fixedly connected are respectively provided at the upper and lower ends of the lead screw and on the upper and lower outer surfaces of the combined first and second outer support frames.

[0018] Furthermore, the top end of the lead screw is provided with a cross groove for use with a screwdriver.

[0019] Compared with the prior art, the present invention has the following beneficial effects: The present invention, through its extrusion mechanism, can pull and draw the circumferential main reinforcement and the reserved reinforcement of the invert arch closer together within the assembly area enclosed by the first and second outer support frames. With the fixed cooperation of the first and second outer support frames, a fixed connection between the circumferential main reinforcement and the reserved reinforcement of the invert arch within the tunnel is achieved. Furthermore, through its clamping mechanism, different specifications of circumferential main reinforcement and reserved reinforcement of the invert arch can be clamped and fixed inside the corresponding first and second sleeves. This not only increases the universal applicability of the equipment but also ensures the clamping stability of the circumferential main reinforcement and the reserved reinforcement of the invert arch within the corresponding sleeves, resulting in good performance. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 This is a cross-sectional perspective view of the interior of an embodiment of the present invention.

[0022] Figure 2 This is a three-dimensional structural view of the interior of an embodiment of the present invention from another perspective;

[0023] Figure 3 This is a perspective view of the combination of translation component and linkage mechanism according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the overall frontal planar structure according to an embodiment of the present invention;

[0025] Figure 5 This is a perspective view of the second outer support frame according to an embodiment of the present invention.

[0026] Figure 6 This is a perspective view of the assembled three-dimensional structure of an embodiment of the present invention, showing the application of connecting the circumferential main reinforcement and the reserved reinforcement of the invert arch.

[0027] Figure 7 This is a three-dimensional structural diagram of an embodiment of the present invention applied to a steel bar trolley.

[0028] In the diagram: 100, traction and pulling unit; 1, first sleeve; 2, second sleeve; 3, outer sleeve; 31, first spring; 4, first outer support frame; 41, second outer support frame; 411, slot; 5, extrusion mechanism; 51, first wedge; 52, second wedge; 53, lead screw; 6, clamping mechanism; 61, clamping arc plate; 62, translation assembly; 621, first rack; 622, double gear; 623, internal gear ring; 624, connecting rod; 625, gear; 626, second rack; 7, nut; 8, linkage mechanism; 81, pulley; 82, transmission belt; 83, tensioning pulley; 831, axle; 84, second spring. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0032] like Figure 1-7As shown, the present invention discloses a rebar traction connection device, which is used for the fixed installation of circumferential main bars in tunnels. It includes a traction and pulling unit 100 for fixing and connecting a single set of circumferential main bars and pre-reserved rebars for the invert arch. The traction and pulling unit 100 includes a first sleeve 1 and a second sleeve 2 respectively sleeved and installed outside the circumferential main bars and the pre-reserved rebars for the invert arch. The outer sleeves 3 are correspondingly provided on the outside of the first sleeve 1 and the second sleeve 2. A first outer support frame 4 is provided on one side of the outer sleeves 3. A second outer support frame 41 for fixing and connecting the circumferential main bars and the pre-reserved rebars for the invert arch is provided on the first outer support frame 4.

[0033] The extrusion mechanism 5 is set on the opposite end faces of the two outer sleeves 3, and is used to extrude from both sides in the closed cavity of the first outer support frame 4 and the second outer support frame 41 to make the circumferential main reinforcement and the reserved reinforcement of the invert arch approach each other.

[0034] The clamping mechanism 6 is correspondingly disposed inside the first sleeve 1 and the second sleeve 2, and clamps and fixes the circumferential main reinforcement and the reserved reinforcement of the invert arch respectively sleeved on the first sleeve 1 and the second sleeve 2.

[0035] In practice, the steel bar trolley is used to move the steel bar into the tunnel, and the circumferential main bars are distributed at equal intervals on the steel bar trolley so that each circumferential main bar corresponds to and approaches the reserved steel bar of the invert arch. Then, the disassembled first outer support frame 4 in this equipment is taken out, and the first sleeve 1 and the second sleeve 2, which are combined in the two outer sleeves 3 installed inside the first outer support frame 4, are respectively fitted and installed on the outside of a set of circumferential main bars and reserved steel bars of the invert arch. Then, the second outer support frame 41 is pushed in from the front of the first outer support frame 4. At this time, the pressing mechanism 5 is operated, and the circumferential main bars and reserved steel bars of the invert arch, as well as the two outer sleeves 3 that are correspondingly fitted and combined in the closed assembly cavity of the first outer support frame 4 and the second outer support frame 41, are brought closer to each other. With the cooperation of the clamping mechanism 6, not only is the stable clamping effect of the circumferential main bars and reserved steel bars of the invert arch installed in the first sleeve 1 and the second sleeve 2 achieved, but also the fixed connection of a single set of circumferential main bars and reserved steel bars of the invert arch is achieved in the tunnel.

[0036] It should be noted that the upper ends of the first outer support frame 4 and the upper ends of the second outer support frame 41 are assembled by overlapping, while the lower ends of the first outer support frame 4 and the lower ends of the second outer support frame 41 are connected by slots and inserts.

[0037] In one embodiment, the extrusion mechanism 5 includes a first wedge 51 disposed on the opposite end faces of the two outer sleeves 3, and a second wedge 52 which is closely attached to the first wedge 51 and vertically slotted and slidably installed on the inner side of the first outer support frame 4. The second wedge 52 is provided with a lead screw 53 rotatably connected to the upper and lower ends of the first outer support frame 4. This design, with a first wedge 51 welded to the outer side of the outer sleeve 3 and a second wedge 52 whose inclined surface abuts against the first wedge 51, allows the screw 53 protruding from the upper end of the first outer support frame 4 to rotate. This rotation drives the second wedge 52, which is threaded and rotates within the slot in the first outer support frame 4, to move vertically. Since the inclined surfaces of the first wedge 51 and the second wedge 52 are always in contact, when the second wedge 52 moves downward, the resulting vertical downward thrust is converted into a horizontal thrust by the first wedge 51. This causes the outer sleeve 3 and the reinforcing bars installed inside the outer sleeve 3 to move horizontally. When the screw 53 installed on the outer side of the two outer sleeves 3 are operated in turn, the two outer sleeves 3 are moved closer to each other, thus bringing the circumferential main reinforcement and the reserved reinforcing bars of the inverted arch installed in the first sleeve 1 and the second sleeve 2 closer together.

[0038] In one embodiment, several first springs 31 are provided between the two outer sleeves 3 to support the two outer sleeves 3 as they move closer or further apart in the horizontal direction. This design, with several vertically equidistant first springs 31 welded to the two outer sleeves 3, can horizontally pull the two outer sleeves 3, providing not only support but also allowing the spacing between the two outer sleeves 3 to change under the pressure of the compression mechanism 5, resulting in good performance.

[0039] In one embodiment, the clamping mechanism 6 includes two sets of clamping arc plates 61 coaxially disposed inside the first sleeve 1 and the second sleeve 2, and a translation component 62 correspondingly disposed inside the outer sleeve 3 and pushing one set of clamping arc plates 61 to move towards or away from each other on the horizontal plane. This design, by using two sets of clamping arc plates 61 coaxially installed inside the first sleeve 1 and the second sleeve 2, and driving the two clamping arc plates 61 included in one set of clamping arc plates 61 to translate on the horizontal plane, achieves a stable clamping effect for multi-specification steel bars by bringing the two clamping arc plates 61 close together. It also allows for adjustment of the clamping degree of the steel bars, making overall operation convenient and improving the versatility of the device.

[0040] It should be noted that the ends of the two clamping arc plates 61 that are close to each other are not completely closed, which improves the clamping effect of steel bars of various specifications.

[0041] In one embodiment, the translation component 62 includes a first rack 621 disposed on the opposite end faces of a set of two clamping arc plates 61, and a double gear 622 correspondingly meshing on one side of the first rack 621. The upper tooth block portion of the double gear 622 is externally meshed with an internal gear ring 623. A connecting rod 624 is disposed on the double gear 622, and a gear 625 is disposed at the lower end of the connecting rod 624. A second rack 626 is meshed on one side of the gear 625. This design, through the first rack 621 welded to the opposite end faces of two clamping arc plates 61, and the double gear 622 meshing on the first rack 621 and the internal gear ring 623 meshing on the upper tooth block portion of the double gear 622, when the internal gear ring 623 is subjected to rotational force, will drive the upper tooth block portion of the two symmetrically meshing double gears 622 on the internal gear ring 623 to rotate, thereby driving the double gear 622 to rotate as a whole. Under the meshing of the first rack 621 and the double gear 622, the force can be transmitted to the clamping arc plate 61 welded to the inner end of the first rack 621 to move towards each other, thus achieving the stable clamping effect of the corresponding steel bar;

[0042] Furthermore, by slotting and fixing a connecting rod 624 at the center of the end face of the double gear 622, and a gear 625 sleeved at the lower end of the connecting rod 624, and a second rack 626 meshing and driving on the side of the gear 625, the second rack 626 welded to the lower end of the clamping arc plate 61 and symmetrical to the first rack 621 can be moved synchronously. This allows for positioning and clamping of the upper and lower points of the reinforcing bar within the first sleeve 1 and the second sleeve 2, thus improving the two-point clamping effect.

[0043] It should be noted that the first rack 621 and the second rack 626 are slotted at corresponding positions on the outer sleeve 3 for sliding guide connection.

[0044] In one embodiment, a linkage mechanism 8, which is connected to the lead screw 53, is horizontally arranged on the internal gear ring 623.

[0045] The linkage mechanism 8 includes a pulley 81 sleeved on the lead screw 53 and a transmission belt 82 mounted on the pulley 81 and wound around the internal gear ring 623 for transmission. Two tensioning pulleys 83 are vertically arranged on the center connection line between the pulley 81 and the internal gear ring 623 and are wound around the belt surface of the transmission belt 82. Each of the two tensioning pulleys 83 is provided with a wheel axle 831 that is horizontally slidably limited within the upper surface of the first outer support frame 4. The lower ends of the two wheel axles 831 are correspondingly provided with support seats connected by a second spring 84. This design involves mounting a fixed pulley 81 on the lead screw 53 and winding a transmission belt 82 around it. The other end of the transmission belt 82 is then wound around the outer support wall of the internal gear ring 623. When the lead screw 53 rotates, it drives the fixed pulley 81 to rotate, which in turn drives the internal gear ring 623 via the transmission belt 82. This achieves synchronous movement between the internal gear ring 623 and the second wedge 52 on the lead screw 53, which is in helical rotational engagement. The interconnected use of these structures improves installation efficiency.

[0046] Furthermore, by vertically installing two tensioning pulleys 83 on the center connection line between the internal gear ring 623 and the pulley 81, which are wound around the inner surface of the transmission belt 82, and by installing a fixed axle 831 on the end face of the corresponding tensioning pulley 83 and a second spring 84 for lateral elastic tension between the support seat installed at the lower end of the axle 831, the tension of the transmission belt 82 can be maintained by the lateral expansion and contraction of the tensioning pulleys 83 when the center distance between the internal gear ring 623 and the pulley 81 changes, thus achieving a good transmission effect.

[0047] It should be noted that the upper end of the axle 831 is adapted to be installed in the slot on the corresponding upper surface of the first outer support frame 4, which enables the lateral positioning of the axle 831.

[0048] In one embodiment, the upper and lower end faces of the second outer support frame 41 are both provided with slots 411 adapted to the passage of the lead screw 53. With this design, the second outer support frame 41 can be laterally pushed to assemble with the first outer support frame 4 by means of the slots 411 machined on the upper and lower end faces of the second outer support frame 41 to slide and match the outer diameter of the lead screw 53.

[0049] In one embodiment, nuts 7 are fixedly connected to the upper and lower ends of the lead screw 53 and to the upper and lower outer surfaces of the combined first outer support frame 4 and second outer support frame 41, respectively. This design achieves the fixation of the first outer support frame 4 and the second outer support frame 41 by using two nuts 7 for upper and lower limiting fixation at the upper and lower ends of the lead screw 53 and to the upper and lower outer surfaces of the combined overlapping first outer support frame 4 and second outer support frame 41.

[0050] It should be noted that the upper and lower ends of the lead screw 53 are machined with an external thread that matches the nut 7, similar to the fastening connection of the lead screw and nut 7.

[0051] In one embodiment, the top end of the lead screw 53 is provided with a cross-shaped groove for use with a screwdriver. This design, by machining the cross-shaped groove at the top end of the lead screw 53 to fit the screwdriver tip, facilitates the rotation of the lead screw 53 using an external auxiliary tool, the screwdriver, thus improving operational convenience.

[0052] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A rebar traction connection device, comprising a traction and pull-out unit (100) for fixing and connecting a single set of circumferential main bars and pre-reserved rebar for an invert arch, wherein the traction and pull-out unit (100) comprises a first sleeve (1) and a second sleeve (2) respectively sleeved and installed outside the circumferential main bars and the pre-reserved rebar for the invert arch, characterized in that: The first sleeve (1) and the second sleeve (2) are respectively provided with an outer sleeve (3). A first outer support frame (4) is provided on one side of the two outer sleeves (3). A second outer support frame (41) is provided on the first outer support frame (4) for fixing and connecting the circumferential main reinforcement and the reserved reinforcement of the invert arch. The extrusion mechanism (5) is set on the two outer sleeves (3) at their opposite ends. It is used to extrude from both sides in the closed cavity of the first outer support frame (4) and the second outer support frame (41) to make the circumferential main reinforcement and the reserved reinforcement of the invert arch approach each other. The extrusion mechanism (5) includes a first wedge (51) correspondingly set on the two outer sleeves (3) at their opposite ends, and a second wedge (52) closely attached to the first wedge (51) and vertically slotted and slidably installed on the inner side of the first outer support frame (4). The second wedge (52) is provided with a screw (53) rotatably connected to the upper and lower ends of the first outer support frame (4). The clamping mechanism (6) is correspondingly disposed inside the first sleeve (1) and the second sleeve (2) to clamp and fix the circumferential main reinforcement and the reserved reinforcement of the invert arch respectively sleeved on the first sleeve (1) and the second sleeve (2). The clamping mechanism (6) includes two sets of clamping arc plates (61) coaxially disposed inside the first sleeve (1) and the second sleeve (2), and a translation component (62) correspondingly disposed inside the outer sleeve (3) to push a set of clamping arc plates (61) to face each other or move apart on the horizontal plane. The translation component (62) includes a first rack (621) disposed on the opposite end faces of two clamping arc plates (61) respectively, and a double gear (622) meshing with one side of the first rack (621). The upper tooth block portion of the double gear (622) is externally meshed with an internal gear ring (623). A connecting rod (624) is disposed on the double gear (622). A gear (625) is disposed at the lower end of the connecting rod (624). A second rack (626) meshes with one side of the gear (625). The internal gear ring (623) is horizontally provided with a linkage mechanism (8) that is connected to the lead screw (53) for transmission. The linkage mechanism (8) includes a pulley (81) sleeved on the lead screw (53) and a transmission belt (82) mounted on the pulley (81) and wound around the internal gear ring (623). Two tensioning pulleys (83) are vertically arranged on the center connection line between the pulley (81) and the internal gear ring (623) and are wound around the belt surface of the transmission belt (82). Each of the two tensioning pulleys (83) is provided with a wheel axle (831) that slides horizontally and is limited to the upper surface of the first outer support frame (4). The lower ends of the two wheel axles (831) are respectively provided with a support seat connected by a second spring (84).

2. The rebar traction and connection device according to claim 1, characterized in that: Several first springs (31) are provided between the two outer sleeves (3) to support the two outer sleeves (3) to move closer or further apart in the horizontal direction.

3. The rebar traction and connection device according to claim 1, characterized in that: The upper and lower end faces of the second outer support frame (41) are provided with slots (411) adapted to the passage of the lead screw (53).

4. The rebar traction and connection device according to claim 3, characterized in that: The upper and lower ends of the lead screw (53) and the upper and lower outer surfaces of the combined first outer support frame (4) and second outer support frame (41) are respectively provided with nuts (7) for fixed connection.

5. A rebar traction and connection device according to claim 1, characterized in that: The top end of the lead screw (53) is provided with a cross groove for use with a screwdriver.

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