Steel strand penetrating device for prestress tension

Abstract

The invention relates to a steel strand penetrating device for prestress tensioning, and relates to the technical field of prestress tensioning, the steel strand penetrating device comprises a corrugated header pipe, the corrugated header pipe comprises two first corrugated pipes, two second corrugated pipes and two third corrugated pipes, and the inner walls of the first corrugated pipes, the second corrugated pipes and the third corrugated pipes are all provided with threaded grooves; the number of the steel strands is not less than one, and the steel strands are arranged in the corrugated header pipe in a penetrating manner; the fixing assembly is connected with the corrugated header pipe and used for reinforcing the steel strand; the stirring assembly is installed in the corrugated header pipe and comprises a first stirring piece, a second stirring piece and a third stirring piece, the first stirring piece, the second stirring piece and the third stirring piece are completely identical in structure, the first stirring piece is installed in the first corrugated pipe, and the second stirring piece is installed in the second corrugated pipe; and the third stirring piece is mounted in the third corrugated pipe. The method has the effects of improving the uniformity of the grouting slurry and improving the structural stability of the component.

Description

Technical Field

[0001] The present application relates to the technical field of prestressed tensioning, and in particular to a steel strand threading device for prestressed tensioning. Background Art

[0002] Prestressing is to add tension to the components in advance, so that the prestressed components are subjected to compressive stress, and then cause them to produce a certain deformation to cope with the load on the structure itself. Before the engineering structure components are subjected to external loads, pre-tensioning stress is applied to the steel strands in the tension module to improve the bending resistance and stiffness of the components, delay the appearance of cracks, and increase the durability of the components.

[0003] In the field of cable-stayed bridge construction, due to the large span of the main beam of the cable-stayed bridge, the main beam needs to be prestressed during construction. Before prestressing, the steel strands need to be inserted into the prestressed pipes reserved on the main beams using a steel strand threading device. Since a corrugated pipe will be inserted into the prestressed pipe before transmission, the prestressed pipes need to be grouted after the steel strands are threaded to ensure the stability of the component structure.

[0004] With regard to the above-mentioned related technologies, due to the complex grouting conditions, impurities such as soil, sand and gravel may enter the slurry during the grouting process, resulting in uneven slurry and incomplete grouting. Summary of the invention

[0005] In order to improve the uniformity of grouting slurry and enhance the structural stability of components, the present application provides a prestressed steel strand threading device.

[0006] The present application provides a prestressed steel strand threading device, which adopts the following technical solution: A prestressed steel strand threading device, comprising: A bellows main pipe, the bellows main pipe comprises two first bellows, two second bellows and two third bellows, the two third bellows are connected, the two second bellows are respectively connected with the two third bellows, the two first bellows are respectively connected with one end of the two second bellows away from the first bellows, the diameter of the first bellows is larger than the diameter of the second bellows, the diameter of the second bellows is larger than the diameter of the third bellows, and the inner walls of the first bellows, the second bellows and the third bellows are all provided with thread grooves; At least one steel strand, wherein at least one of the steel strands is inserted into the corrugated main pipe; A fixing assembly, the fixing assembly is connected to the corrugated main pipe, and the fixing assembly is used to reinforce the steel strand; A stirring assembly, the stirring assembly is installed in the corrugated main pipe, the stirring assembly includes a first stirring member, a second stirring member and a third stirring member, the first stirring member, the second stirring member and the third stirring member have the same structure, the first stirring member is installed in the first corrugated pipe, the second stirring member is installed in the second corrugated pipe, and the third stirring member is installed in the third corrugated pipe; Wherein, the first stirring member comprises: a substrate, the substrate being disposed in the first corrugated tube; At least one slurry inlet hole, at least one slurry inlet hole is opened through the substrate, and a pressure valve is installed in the slurry inlet hole; At least one steel strand through-hole is provided, wherein at least one steel strand through-hole is provided through the base plate, and the steel strand is provided in the steel strand through-hole; A first end face ratchet, the first end face ratchet is rotatably mounted on the base plate, two symmetrically arranged sliders are fixedly mounted on the outer side wall of the first end face ratchet, the sliders are slidably arranged in the thread groove, and the first end face ratchet is annular; A position-limiting telescopic rod, wherein a fixed end of the position-limiting telescopic rod is fixedly mounted on the base plate; a second end face ratchet, the second end face ratchet is fixedly connected to the movable end of the position-limiting telescopic rod, the second end face ratchet is meshed with the first end face ratchet, and the second end face ratchet is annular; An internal gear, the internal gear being fixedly mounted on the inner wall of the second end face ratchet; A guide groove, wherein the guide groove is provided on the substrate, and the guiding direction of the guide groove is circular; Four sliding plates, the four sliding plates being evenly and slidably mounted in the guide groove; a threaded sleeve, the threaded sleeve being rotatably mounted on the sliding plate; A first spur gear, which is coaxially sleeved and fixedly mounted on the threaded sleeve, and is meshingly connected with the internal gear; A rotating rod, the rotating rod is coaxially and fixedly mounted on the threaded sleeve; A stirring plate is fixedly mounted on the rotating rod.

[0007] By adopting the above technical scheme, when a prestressed steel strand bundle threading device is used, the corrugated main pipe is fixedly buried in the bridge, and then the steel strands are threaded into the corrugated main pipe and installed on the stirring assembly, and then the fixed assembly is installed at both ends of the steel strands, and the steel strands are prestressed by the fixed assembly, and then grouting is injected into the corrugated main pipe, and the stirring assembly works. Under the action of the stirring assembly, the uniformity of the grouting slurry is improved, and the structural stability of the component is improved. When grouting into the corrugated main pipe, the slurry enters the first corrugated pipe, and the slurry pushes the substrate to move in the direction close to the second corrugated pipe. While the substrate moves, the slider slides in the threaded groove. The sliding of the slider drives the first end face ratchet to rotate around the axis of the first bellows. The rotation of the first end face ratchet drives the second end face ratchet to rotate. The rotation of the second end face ratchet drives the internal gear to rotate. The rotation of the internal gear drives the first spur gear to rotate around the axis of the screw. The rotation of the first spur gear drives the threaded sleeve to rotate. The rotation of the threaded sleeve drives the rotating rod to rotate. The rotation of the rotating rod drives the stirring plate to rotate. The rotation of the stirring plate realizes the stirring of the grouting slurry, improves the uniformity of the grouting slurry, and improves the structural stability of the component.

[0008] Optionally, the first stirring member further comprises a screw, the screw is fixedly mounted on the sliding plate, and the threaded sleeve is coaxially sleeved and threadedly connected to the screw.

[0009] By adopting the above technical solution, the first spur gear rotates and then drives the threaded sleeve to rotate. Under the action of the screw, the threaded sleeve rotates around the screw axis and moves toward the substrate, thereby driving the rotating rod and the stirring plate to move toward the substrate, thereby improving the uniformity of the grouting slurry and improving the structural stability of the component.

[0010] Optionally, the first stirring member further includes a second spur gear, the second spur gear is fixedly mounted on the substrate, the second spur gear is meshingly connected with the first spur gear, and the second spur gear is annular.

[0011] By adopting the above technical solution, under the action of the second spur gear, the first spur gear rotates while the first spur gear rotates around the axis of the second spur gear, thereby further improving the uniformity of the grouting slurry and improving the structural stability of the component.

[0012] Optionally, a limiting spring is sleeved on the limiting telescopic rod, one end of the limiting spring is fixedly connected to the fixed end of the limiting telescopic rod, and the other end of the limiting spring is fixedly connected to the movable end of the limiting telescopic rod.

[0013] By adopting the above technical solution, it is ensured that the first end face ratchet and the second end face ratchet are always engaged, thereby improving the structural stability of the first stirring member.

[0014] Optionally, the first stirring member further includes a torsion spring, which is sleeved on the screw rod, one end of the torsion spring is fixedly connected to the screw rod, and the other end of the torsion spring is fixedly connected to the threaded sleeve.

[0015] By adopting the above technical solution, the first straight gear rotates and then drives the threaded sleeve to rotate. Under the action of the screw, the threaded sleeve rotates with the screw axis as the center and moves in the direction close to the substrate, thereby driving the rotating rod and the stirring plate to move in the direction close to the substrate. The threaded sleeve applies pressure to the torsion spring while moving. When the substrate stops moving, the torsion spring releases the pressure, and the threaded sleeve rotates under the action of the torsion spring, and the threaded sleeve moves in the direction away from the substrate, thereby driving the rotating rod and the stirring plate to move in the direction away from the substrate. The stirring plate also rotates with the screw axis as the center while moving, so as to achieve the stirring of the grouting slurry, improve the uniformity of the grouting slurry, and improve the structural stability of the component.

[0016] Optionally, three groups of first positioning components are installed on the corrugated main pipe, and the three groups of first positioning components are respectively installed on the first corrugated pipe, the second corrugated pipe and the third corrugated pipe, and the first positioning components include: No less than two first telescopic rods, the fixed ends of the first telescopic rods being evenly and fixedly mounted on one end of the corrugated main pipe, the axes of the first telescopic rods being perpendicular to the axes of the corrugated main pipe, and the movable ends of the first telescopic rods being passed through and slidably mounted on the corrugated main pipe; A first spring, wherein the first spring is sleeved on the first telescopic rod, one end of the first spring is fixedly connected to the movable end of the first telescopic rod, and the other end of the first spring is fixedly connected to the fixed end of the first telescopic rod.

[0017] By adopting the above technical solution, when grouting work is not carried out, the movable end of the first telescopic rod is embedded in the positioning groove, so that the position of the stirring assembly in the corrugated main pipe is relatively fixed, thereby improving the structural stability of a prestressed steel strand threading device, avoiding displacement of the stirring assembly and thus affecting the subsequent work of the stirring assembly.

[0018] Optionally, three groups of second positioning components are installed on the corrugated main pipe, and the three groups of second positioning components are respectively installed on the first corrugated pipe, the second corrugated pipe and the third corrugated pipe, and the second positioning components include: No less than two second telescopic rods, the fixed ends of the second telescopic rods being evenly and fixedly mounted on one end of the bellows main pipe away from the first telescopic rod, the axes of the second telescopic rods being perpendicular to the axis of the bellows main pipe, and the movable ends of the second telescopic rods being passed through and slidably mounted on the bellows main pipe; The second spring is sleeved on the second telescopic rod, one end of the second spring is fixedly connected to the movable end of the second telescopic rod, and the other end of the second spring is fixedly connected to the fixed end of the second telescopic rod.

[0019] By adopting the above technical solution, after the grouting work is completed, the movable end of the second telescopic rod is embedded in the positioning groove, so that the position of the stirring assembly in the corrugated main pipe is relatively fixed, thereby improving the structural stability of a prestressed steel strand threading device.

[0020] Optionally, a positioning groove is formed on the periphery of the base plate, and both the movable end of the first telescopic rod and the movable end of the second telescopic rod can be embedded in the positioning groove.

[0021] By adopting the above technical solution, it is ensured that the movable end of the first telescopic rod and the movable end of the second telescopic rod are embedded in the positioning groove, thereby improving the structural stability of the first positioning assembly and the second positioning assembly.

[0022] Optionally, three groups of buffer components are installed on the corrugated main pipe, and the three groups of buffer components are respectively installed on the first corrugated pipe, the second corrugated pipe and the third corrugated pipe, and the buffer components include: No less than two buffer telescopic rods, which are evenly and fixedly mounted on one end of the bellows main pipe away from the first telescopic rod, the axis of the buffer telescopic rod is parallel to the axis of the bellows main pipe, and the movable ends of the buffer telescopic rods are passed through and slidably mounted on the bellows main pipe; A buffer spring is sleeved on the buffer telescopic rod, one end of the buffer spring is fixedly connected to the movable end of the buffer telescopic rod, and the other end of the buffer spring is fixedly connected to the fixed end of the buffer telescopic rod.

[0023] By adopting the above technical solution, during the grouting process, the substrate moves toward the direction close to the movable end of the buffer telescopic rod and abuts against the movable end of the buffer telescopic rod. Under the action of the buffer spring, the substrate has a buffering effect, reducing the grouting speed, avoiding the grouting speed being too fast and causing too many bubbles to appear in the slurry, affecting the uniformity of the grouting slurry.

[0024] Optionally, the fixing component includes: Two anchor pads, which are symmetrical and fixedly sleeved at both ends of the corrugated main pipe; Two spiral ribs, the two spiral ribs are symmetrical and sleeved at two ends of the corrugated main pipe, and the spiral ribs are fixedly connected to the anchor plate; a first anchor plate, the first anchor plate abutting against one end of the anchor pad away from the spiral reinforcement, the first anchor plate being provided with at least one first anchor clip, the steel strand being provided on the first anchor clip; A limiting plate, the limiting plate abuts against one end of the first anchor plate away from the anchor pad, and the steel strand is passed through the limiting plate; A jack, wherein a fixed end of the jack abuts against an end of the limit plate away from the first anchor plate, and the steel strand is passed through the jack; a second anchor plate, the second anchor plate being fixedly mounted on the movable end of the jack, the second anchor plate being provided with at least one second anchor clip, the steel strand being provided on the second anchor clip; A grouting pipe is provided on the anchor plate and is connected to the corrugated main pipe.

[0025] By adopting the above technical solution, when the steel strand is prestressed, the jack works and the movable end of the jack moves away from the fixed end of the jack, thereby driving the two ends of the steel strand to stretch, so that the steel strand applies a vertical upward force to the corrugated main pipe, thereby realizing prestressed tensioning.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. When using a prestressed steel strand threading device, the corrugated main pipe is fixedly buried in the bridge, and then the steel strand is threaded into the corrugated main pipe and installed on the stirring assembly, and then the fixed assembly is installed at both ends of the steel strand, and the steel strand is prestressed through the fixed assembly, and then grouting is injected into the corrugated main pipe, and the stirring assembly works, and the uniformity of the grouting slurry is improved under the action of the stirring assembly, and the structural stability of the component is improved; 2. When grouting into the corrugated main pipe, the slurry enters the first corrugated pipe, and the slurry pushes the substrate to move in the direction close to the second corrugated pipe. While the substrate moves, the slider slides in the thread groove, and the sliding of the slider drives the first end face ratchet to rotate around the axis of the first corrugated pipe. The rotation of the first end face ratchet drives the second end face ratchet to rotate. The rotation of the second end face ratchet drives the internal gear to rotate. The rotation of the internal gear drives the first spur gear to rotate around the axis of the screw. The rotation of the first spur gear drives the threaded sleeve to rotate. The rotation of the threaded sleeve drives the rotating rod to rotate. The rotation of the rotating rod drives the stirring plate to rotate. The stirring plate rotates to achieve stirring of the grouting slurry, improve the uniformity of the grouting slurry, and improve the structural stability of the component. 3. When the steel strand is prestressed, the jack works and the movable end of the jack moves away from the fixed end of the jack, thereby driving the two ends of the steel strand to stretch, so that the steel strand applies a vertical upward force to the corrugated main pipe to achieve prestressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the installation of an embodiment of the present application; Figure 2 It is a schematic diagram of the structure of an embodiment of the present application; Figure 3 It is a schematic diagram for showing the structure inside the corrugated main pipe; Figure 4 yes Figure 2 A magnified image of point A; Figure 5 yes Figure 2 The enlarged view of point B; Figure 6 It is a schematic diagram for showing the structure of the stirring assembly; Figure 7 It is a cross-sectional view used to show the structure of the stirring assembly; Figure 8 It is used to show the structural explosion diagram of the grouting pipeline; Fig. 9 It is a schematic diagram used to show the structure of fixed components.

[0028] Description of reference numerals: 1. bellows main pipe; 11. first bellows; 12. second bellows; 13. third bellows; 14. thread groove; 2. Steel strand; 3. Fixing assembly; 31. Spiral reinforcement; 32. First anchor plate; 321. First anchor clip; 33. Limiting plate; 34. Jack; 35. Second anchor plate; 351. Second anchor clip; 36. Grouting pipe; 37. Anchor pad; 4. Stirring assembly; 41. First stirring member; 411. Base plate; 4111. Slurry inlet hole; 4112. Steel strand penetration hole; 4113. Positioning groove; 4114. Guide groove; 4115. Sliding plate; 412. First end face ratchet; 4121. Sliding block; 413. Second end face ratchet; 414. Position limiting telescopic rod; 415. Position limiting spring; 416. Internal gear; 417. First spur gear; 4171. Threaded sleeve; 4172. Rotating rod; 4173. Stirring plate; 418. Screw; 4181. Torsion spring; 419. Second spur gear; 42. Second stirring member; 43. Third stirring member; 5. first positioning assembly; 51. first telescopic rod; 52. first spring; 6. second positioning assembly; 61. second telescopic rod; 62. second spring; 7. Buffer assembly; 71. Buffer telescopic rod; 72. Buffer spring. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0032] The following is combined with Figure 1-9 This application is described in further detail.

[0033] The embodiment of the present application discloses a steel strand threading device for prestressed tensioning.

[0034] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5The prestressed steel strand bundle threading device comprises a corrugated main pipe 1, a steel strand 2 of not less than one number, a fixing assembly 3 and a stirring assembly 4. The corrugated main pipe 1 comprises two first corrugated pipes 11, two second corrugated pipes 12 and two third corrugated pipes 13, the two third corrugated pipes 13 are connected, the two second corrugated pipes 12 are respectively connected with the two third corrugated pipes 13, the two first corrugated pipes 11 are respectively connected with one end of the two second corrugated pipes 12 away from the first corrugated pipe 11, the diameter of the first corrugated pipe 11 is larger than the diameter of the second corrugated pipe 12, the diameter of the second corrugated pipe 12 is larger than the diameter of the third corrugated pipe 13, the inner walls of the first corrugated pipe 11, the second corrugated pipe 12 and the third corrugated pipe 13 are all provided with a thread groove 14, and the inner wall of the thread groove 14 is smooth. At least one steel strand 2 is inserted into the corrugated main pipe 1. The fixing assembly 3 is connected to the corrugated main pipe 1, and the fixing assembly 3 is used to reinforce the steel strand 2. The stirring component 4 is installed in the corrugated main pipe 1, and the stirring component 4 includes a first stirring member 41, a second stirring member 42 and a third stirring member 43. The first stirring member 41, the second stirring member 42 and the third stirring member 43 are completely the same in structure. The first stirring member 41 is installed in the first corrugated pipe 11, the second stirring member 42 is installed in the second corrugated pipe 12, and the third stirring member 43 is installed in the third corrugated pipe 13.

[0035] When using a prestressed steel strand threading device, the corrugated main pipe 1 is fixedly buried in the bridge, and then the steel strand 2 is passed through the corrugated main pipe 1 and installed on the stirring component 4, and then the fixing component 3 is installed at both ends of the steel strand 2, and the steel strand 2 is prestressed through the fixing component 3, and then grouting is injected into the corrugated main pipe 1, and the stirring component 4 works. Under the action of the stirring component 4, the uniformity of the grouting slurry is improved, and the structural stability of the component is improved.

[0036] Reference Figure 3 , Figure 6 as well as Figure 7 Taking the structure of the first stirring member 41 as an example, the first stirring member 41 includes a base plate 411, at least one slurry inlet hole 4111, at least one steel strand through hole 4112, a first end face ratchet 412, a limiting telescopic rod 414, a second end face ratchet 413, an internal gear 416, a guide groove 4114, four sliding plates 4115, a threaded sleeve 4171, a first spur gear 417, a rotating rod 4172, a stirring plate 4173, a screw 418, a second spur gear 419 and a torsion spring 4181.

[0037] The base plate 411 is arranged in the first bellows 11, and a positioning groove 4113 is provided on the periphery of the base plate 411, and the positioning groove 4113 is in a circular ring shape. There are at least one slurry inlet hole 4111, and at least one slurry inlet hole 4111 is provided through the base plate 411, and a pressure valve is installed in the slurry inlet hole 4111. There are at least one steel strand through hole 4112 is provided through the base plate 411, and the steel strand 2 is provided in the steel strand through hole 4112. The first end face ratchet 412 is rotatably mounted on the base plate 411, and two symmetrically arranged sliders 4121 are fixedly mounted on the outer side wall of the first end face ratchet 412, and the sliders 4121 are slidably arranged in the thread groove 14, and the first end face ratchet 412 is annular. The fixed end of the limit telescopic rod 414 is fixedly mounted on the base plate 411. The limit telescopic rod 414 is sleeved with a limit spring 415. One end of the limit spring 415 is fixedly connected to the fixed end of the limit telescopic rod 414, and the other end of the limit spring 415 is fixedly connected to the movable end of the limit telescopic rod 414. The limit spring 415 always applies a force close to the fixed end of the limit telescopic rod 414 to the movable end of the limit telescopic rod 414. The second end face ratchet 413 is fixedly connected to the movable end of the limit telescopic rod 414, and the second end face ratchet 413 is meshed with the first end face ratchet 412. The second end face ratchet 413 is annular. The internal gear 416 is fixedly mounted on the inner wall of the second end face ratchet 413. The guide groove 4114 is opened on the base plate 411, and the guide direction of the guide groove 4114 is circular. Four sliding plates 4115 are evenly and slidably mounted in the guide groove 4114. The threaded sleeve 4171 is rotatably mounted on the sliding plate 4115. The first spur gear 417 is coaxially sleeved and fixedly mounted on the threaded sleeve 4171, and the first spur gear 417 is meshed with the internal gear 416. The rotating rod 4172 is coaxially and fixedly mounted on the threaded sleeve 4171. The stirring plate 4173 is fixedly mounted on the rotating rod 4172. The screw 418 is fixedly mounted on the sliding plate 4115, and the threaded sleeve 4171 is coaxially sleeved and threadedly connected to the screw 418. The second spur gear 419 is fixedly mounted on the base plate 411, and the second spur gear 419 is meshed with the first spur gear 417, and the second spur gear 419 is annular. The internal gear 416 and the second spur gear 419 are always meshed with the first spur gear 417. The torsion spring 4181 is sleeved on the screw 418, and one end of the torsion spring 4181 is fixedly connected to the screw 418, and the other end of the torsion spring 4181 is fixedly connected to the threaded sleeve 4171.

[0038] When grouting into the corrugated main pipe 1, the slurry enters the first corrugated pipe 11, and the slurry pushes the substrate 411 to move in the direction close to the second corrugated pipe 12. While the substrate 411 moves, the slider 4121 slides in the thread groove 14, and the slider 4121 slides and drives the first end face ratchet 412 to rotate around the axis of the first bellows 11. The first end face ratchet 412 rotates and drives the second end face ratchet 413 to rotate. The second end face ratchet 413 rotates and drives the internal gear 416 to rotate. The internal gear 416 rotates and drives the first spur gear 417 to rotate around the axis of the screw 418. The first spur gear 417 rotates and drives the threaded sleeve 4171 to rotate. The threaded sleeve 4171 rotates and drives the rotating rod 4172 to rotate. The rotating rod 4172 rotates and drives the stirring plate 4173 to rotate. The stirring plate 4173 rotates to achieve stirring of the grouting slurry, improve the uniformity of the grouting slurry, and improve the structural stability of the component.

[0039] Under the action of the second spur gear 419, the first spur gear 417 rotates while the first spur gear 417 rotates around the axis of the second spur gear 419, further improving the uniformity of the grouting slurry and improving the structural stability of the component.

[0040] The first straight gear 417 rotates and drives the threaded sleeve 4171 to rotate. Under the action of the screw 418, the threaded sleeve 4171 rotates around the axis of the screw 418 and moves toward the substrate 411, thereby driving the rotating rod 4172 and the stirring plate 4173 to move toward the substrate 411. The threaded sleeve 4171 applies pressure to the torsion spring 4181 while moving. When the substrate 411 stops moving, the torsion spring 4181 releases the pressure. Under the action of the torsion spring 4181, the threaded sleeve 4171 rotates and moves away from the substrate 411, thereby driving the rotating rod 4172 and the stirring plate 4173 to move away from the substrate 411. The stirring plate 4173 also rotates around the axis of the screw 418 while moving, thereby stirring the grouting slurry, improving the uniformity of the grouting slurry, and improving the structural stability of the component.

[0041] When the pressure in the first bellows 11 increases to a preset value, the pressure valve opens, and the grouting slurry enters the second bellows 12 through the grouting hole 4111, and grouting is performed on the second bellows 12. Similarly, when the pressure in the second bellows 12 increases to a preset value, the pressure valve opens, and the grouting slurry enters the third bellows 13 through the grouting hole 4111, and grouting is performed on the third bellows 13, realizing the segmented grouting operation of the bellows main pipe 1, and improving the grouting uniformity with the cooperation of the stirring assembly 4.

[0042] Reference Figure 2 , Figure 3 as well as Figure 4, three groups of first positioning components 5 are installed on the bellows main pipe 1, and the three groups of first positioning components 5 are respectively installed on the first bellows 11, the second bellows 12 and the third bellows 13. The first positioning component 5 includes at least two first telescopic rods 51 and first springs 52. The fixed ends of at least two first telescopic rods 51 are evenly and fixedly installed on one end of the bellows main pipe 1, the axis of the first telescopic rod 51 is perpendicular to the axis of the bellows main pipe 1, and the movable end of the first telescopic rod 51 is penetrated and slidably installed on the bellows main pipe 1. The movable end of the first telescopic rod 51 can be embedded in the positioning groove 4113. The first spring 52 is sleeved on the first telescopic rod 51, one end of the first spring 52 is fixedly connected to the movable end of the first telescopic rod 51, and the other end of the first spring 52 is fixedly connected to the fixed end of the first telescopic rod 51, and the first spring 52 always applies a force to the movable end of the first telescopic rod 51 away from the fixed end of the first telescopic rod 51.

[0043] When grouting is not being performed, the movable end of the first telescopic rod 51 is embedded in the positioning groove 4113, so that the position of the stirring assembly 4 in the corrugated main pipe 1 is relatively fixed, thereby improving the structural stability of a prestressed steel strand threading device and avoiding displacement of the stirring assembly 4 and thus affecting the subsequent operation of the stirring assembly 4.

[0044] Reference Figure 2 , Figure 3 as well as Figure 4 , three groups of second positioning components 6 are installed on the bellows main pipe 1, and the three groups of second positioning components 6 are respectively installed on the first bellows 11, the second bellows 12 and the third bellows 13. The second positioning components 6 include at least two second telescopic rods 61 and second springs 62. The fixed ends of at least two second telescopic rods 61 are evenly and fixedly installed on the end of the bellows main pipe 1 away from the first telescopic rod 51, the axis of the second telescopic rod 61 is perpendicular to the axis of the bellows main pipe 1, and the movable end of the second telescopic rod 61 is penetrated and slidably installed on the bellows main pipe 1. The movable end of the second telescopic rod 61 can be embedded in the positioning groove 4113. The second spring 62 is sleeved on the second telescopic rod 61, one end of the second spring 62 is fixedly connected to the movable end of the second telescopic rod 61, and the other end of the second spring 62 is fixedly connected to the fixed end of the second telescopic rod 61. The second spring 62 always applies a force to the movable end of the second telescopic rod 61 away from the fixed end of the second telescopic rod 61.

[0045] After the grouting work is completed, the movable end of the second telescopic rod 61 is embedded in the positioning groove 4113, so that the position of the stirring assembly 4 in the corrugated main pipe 1 is relatively fixed, thereby improving the structural stability of a prestressed steel strand threading device.

[0046] Reference Figure 2 and Figure 4Three groups of buffer components 7 are installed on the bellows main pipe 1. The three groups of buffer components 7 are installed on the first bellows 11, the second bellows 12 and the third bellows 13 respectively. The buffer components 7 include no less than two buffer telescopic rods 71 ​​and buffer springs 72. No less than two buffer telescopic rods 71 ​​are evenly and fixedly installed on the end of the bellows main pipe 1 away from the first telescopic rod 51. The axis of the buffer telescopic rod 71 is parallel to the axis of the bellows main pipe 1. The movable end of the buffer telescopic rod 71 is penetrated and slidably installed on the bellows main pipe 1. The buffer spring 72 is sleeved on the buffer telescopic rod 71. One end of the buffer spring 72 is fixedly connected to the movable end of the buffer telescopic rod 71, and the other end of the buffer spring 72 is fixedly connected to the fixed end of the buffer telescopic rod 71.

[0047] During the grouting process, the substrate 411 moves toward the direction close to the movable end of the buffer telescopic rod 71 and abuts against the movable end of the buffer telescopic rod 71. Under the action of the buffer spring 72, the substrate 411 has a buffering effect, reducing the grouting speed, avoiding the grouting speed being too fast and causing too many bubbles to appear in the slurry, affecting the uniformity of the grouting slurry.

[0048] Reference Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 8 as well as Fig. 9 The fixing assembly 3 includes two anchor plates 37, two spiral ribs 31, a first anchor plate 32, a limiting plate 33, a jack 34, a second anchor plate 35 and a grouting pipe 36. The two anchor plates 37 are symmetrically and fixedly sleeved on both ends of the corrugated main pipe 1. The two spiral ribs 31 are symmetrically and sleeved on both ends of the corrugated main pipe 1, and the spiral ribs 31 are fixedly connected to the anchor plates 37. The first anchor plate 32 abuts against the end of the anchor plate 37 away from the spiral ribs 31. The first anchor plate 32 is provided with at least one first anchor clip 321, and the steel strand 2 is penetrated on the first anchor clip 321. The first anchor clip 321 is in a truncated cone shape, and the diameter of the end of the first anchor clip 321 close to the anchor plate 37 is smaller than the diameter of the end of the first anchor clip 321 close to the limiting plate 33. The limiting plate 33 abuts against the end of the first anchor plate 32 away from the anchor plate 37, and the steel strand 2 is penetrated on the limiting plate 33. The fixed end of the jack 34 abuts against the end of the limit plate 33 away from the first anchor plate 32, and the steel strand 2 is passed through the jack 34. The second anchor plate 35 is fixedly installed on the movable end of the jack 34, and the second anchor plate 35 is passed through with at least one second anchor clip 351, and the steel strand 2 is passed through the second anchor clip 351. The second anchor clip 351 is in a truncated cone shape, and the diameter of the end of the second anchor clip 351 close to the jack 34 is smaller than the diameter of the end of the first anchor clip 321 away from the jack 34. The grouting pipe 36 is passed through the anchor pad 37, and the grouting pipe 36 is connected to the corrugated main pipe 1.

[0049] When the steel strand 2 is prestressed, the jack 34 works, and the movable end of the jack 34 moves away from the fixed end of the jack 34, thereby driving the two ends of the steel strand 2 to stretch, so that the steel strand applies a vertical upward force to the corrugated main pipe 1 to achieve prestressed tensioning.

[0050] The implementation principle of a prestressed steel strand bundle threading device in an embodiment of the present application is as follows: a corrugated main pipe 1 is fixedly buried in a bridge, and then the steel strand 2 is threaded into the corrugated main pipe 1 and the steel strand 2 is installed on a stirring assembly 4, and then the fixing assembly 3 is installed at both ends of the steel strand 2, and the steel strand 2 is prestressed by the fixing assembly 3, and then grouting is injected into the corrugated main pipe 1, and the stirring assembly 4 works. Under the action of the stirring assembly 4, the uniformity of the grouting slurry is improved, and the structural stability of the component is improved.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A prestressed steel strand threading device, characterized in that: include: A bellows main pipe (1), the bellows main pipe (1) comprising two first bellows (11), two second bellows (12) and two third bellows (13), the two third bellows (13) being connected, the two second bellows (12) being connected respectively to the two third bellows (13), the two first bellows (11) being connected respectively to one end of the two second bellows (12) away from the first bellows (11), the diameter of the first bellows (11) being larger than the diameter of the second bellows (12), the diameter of the second bellows (12) being larger than the diameter of the third bellows (13), and the inner walls of the first bellows (11), the second bellows (12) and the third bellows (13) being provided with a thread groove (14); No less than one steel strand (2), wherein no less than one steel strand (2) is inserted into the corrugated main pipe (1); A fixing component (3), the fixing component (3) being connected to the corrugated main pipe (1), and the fixing component (3) being used to reinforce the steel strand (2); A stirring assembly (4), the stirring assembly (4) being installed in the corrugated main pipe (1), the stirring assembly (4) comprising a first stirring member (41), a second stirring member (42) and a third stirring member (43), the first stirring member (41), the second stirring member (42) and the third stirring member (43) having the same structure, the first stirring member (41) being installed in the first corrugated pipe (11), the second stirring member (42) being installed in the second corrugated pipe (12), and the third stirring member (43) being installed in the third corrugated pipe (13); Wherein, the first stirring member (41) comprises: A substrate (411), the substrate (411) being arranged inside the first corrugated tube (11); No less than one pulp inlet hole (4111), wherein no less than one pulp inlet hole (4111) is opened through the substrate (411), and a pressure valve is installed in the pulp inlet hole (4111); At least one steel strand through-hole (4112), wherein at least one steel strand through-hole (4112) is formed through the base plate (411), and the steel strand (2) is inserted into the steel strand through-hole (4112); a first end face ratchet (412), the first end face ratchet (412) being rotatably mounted on the base plate (411), two symmetrically arranged sliding blocks (4121) being fixedly mounted on an outer side wall of the first end face ratchet (412), the sliding blocks (4121) being slidably arranged in the thread groove (14), and the first end face ratchet (412) being annular; A position-limiting telescopic rod (414), wherein a fixed end of the position-limiting telescopic rod (414) is fixedly mounted on the base plate (411); a second end face ratchet (413), the second end face ratchet (413) being fixedly connected to the movable end of the position-limiting telescopic rod (414), the second end face ratchet (413) being meshed with the first end face ratchet (412), and the second end face ratchet (413) being annular; An internal gear (416), the internal gear (416) being fixedly mounted on an inner wall of the second end face ratchet (413); A guide groove (4114), wherein the guide groove (4114) is provided on the substrate (411), and the guiding direction of the guide groove (4114) is circular; Four sliding plates (4115), the four sliding plates (4115) being evenly and slidably mounted in the guide groove (4114); a threaded sleeve (4171), the threaded sleeve (4171) being rotatably mounted on the sliding plate (4115); a first spur gear (417), the first spur gear (417) being coaxially sleeved and fixedly mounted on the threaded sleeve (4171), the first spur gear (417) being meshingly connected with the internal gear (416); A rotating rod (4172), the rotating rod (4172) being coaxially and fixedly mounted on the threaded sleeve (4171); A stirring plate (4173), wherein the stirring plate (4173) is fixedly mounted on the rotating rod (4172).

2. The prestressed steel strand threading device according to claim 1 is characterized in that: The first stirring member (41) further comprises a screw (418), wherein the screw (418) is fixedly mounted on the sliding plate (4115), and the threaded sleeve (4171) is coaxially sleeved and threadedly connected to the screw (418).

3. The prestressed steel strand threading device according to claim 2 is characterized in that: The first stirring member (41) further comprises a second spur gear (419), the second spur gear (419) being fixedly mounted on the base plate (411), the second spur gear (419) being meshingly connected with the first spur gear (417), and the second spur gear (419) being ring-shaped.

4. The prestressed steel strand threading device according to claim 3 is characterized in that: A limiting spring (415) is sleeved on the limiting telescopic rod (414), one end of the limiting spring (415) is fixedly connected to the fixed end of the limiting telescopic rod (414), and the other end of the limiting spring (415) is fixedly connected to the movable end of the limiting telescopic rod (414).

5. The prestressed steel strand threading device according to claim 4 is characterized in that: The first stirring member (41) further comprises a torsion spring (4181), wherein the torsion spring (4181) is sleeved on the screw rod (418), one end of the torsion spring (4181) is fixedly connected to the screw rod (418), and the other end of the torsion spring (4181) is fixedly connected to the threaded sleeve (4171).

6. The prestressed steel strand threading device according to claim 5, characterized in that: Three groups of first positioning components (5) are installed on the corrugated main pipe (1), and the three groups of first positioning components (5) are installed on the first corrugated pipe (11), the second corrugated pipe (12) and the third corrugated pipe (13) respectively. The first positioning components (5) include: No less than two first telescopic rods (51), the fixed ends of the no less than two first telescopic rods (51) being evenly and fixedly mounted on one end of the corrugated main pipe (1), the axes of the first telescopic rods (51) being perpendicular to the axis of the corrugated main pipe (1), and the movable ends of the first telescopic rods (51) being passed through and slidably mounted on the corrugated main pipe (1); A first spring (52), the first spring (52) being sleeved on the first telescopic rod (51), one end of the first spring (52) being fixedly connected to the movable end of the first telescopic rod (51), and the other end of the first spring (52) being fixedly connected to the fixed end of the first telescopic rod (51).

7. The prestressed steel strand threading device according to claim 6, characterized in that: Three sets of second positioning components (6) are installed on the main bellows pipe (1), and the three sets of second positioning components (6) are installed on the first bellows (11), the second bellows (12) and the third bellows (13) respectively. The second positioning components (6) include: No less than two second telescopic rods (61), the fixed ends of the no less than two second telescopic rods (61) being evenly and fixedly mounted on an end of the corrugated main pipe (1) away from the first telescopic rod (51), the axes of the second telescopic rods (61) being perpendicular to the axis of the corrugated main pipe (1), and the movable ends of the second telescopic rods (61) being passed through and slidably mounted on the corrugated main pipe (1); A second spring (62), the second spring (62) is sleeved on the second telescopic rod (61), one end of the second spring (62) is fixedly connected to the movable end of the second telescopic rod (61), and the other end of the second spring (62) is fixedly connected to the fixed end of the second telescopic rod (61).

8. The prestressed steel strand threading device according to claim 7, characterized in that: A positioning groove (4113) is provided on the circumferential side of the base plate (411), and the movable end of the first telescopic rod (51) and the movable end of the second telescopic rod (61) can both be embedded in the positioning groove (4113).

9. The prestressed steel strand threading device according to claim 8, characterized in that: Three groups of buffer components (7) are installed on the corrugated main pipe (1), and the three groups of buffer components (7) are installed on the first corrugated pipe (11), the second corrugated pipe (12) and the third corrugated pipe (13) respectively. The buffer components (7) include: No less than two buffer telescopic rods (71), the number of which is no less than two, being evenly and fixedly mounted on one end of the corrugated main pipe (1) away from the first telescopic rod (51), the axis of the buffer telescopic rod (71) being parallel to the axis of the corrugated main pipe (1), and the movable ends of the buffer telescopic rods (71) being passed through and slidably mounted on the corrugated main pipe (1); A buffer spring (72), the buffer spring (72) being sleeved on the buffer telescopic rod (71), one end of the buffer spring (72) being fixedly connected to the movable end of the buffer telescopic rod (71), and the other end of the buffer spring (72) being fixedly connected to the fixed end of the buffer telescopic rod (71).

10. The prestressed steel strand threading device according to claim 9, characterized in that: The fixing component (3) comprises: Two anchor plates (37), the two anchor plates (37) being symmetrical and fixedly sleeved on both ends of the corrugated main pipe (1); Two spiral ribs (31), the two spiral ribs (31) are symmetrical and sleeved on two ends of the corrugated main pipe (1), and the spiral ribs (31) are fixedly connected to the anchor plate (37); a first anchor plate (32), the first anchor plate (32) being abutted against an end of the anchor pad (37) away from the spiral rib (31), the first anchor plate (32) being provided with at least one first anchor clip (321), and the steel strand (2) being provided on the first anchor clip (321); a limiting plate (33), the limiting plate (33) being in contact with an end of the first anchor plate (32) away from the anchor pad (37), and the steel strand (2) being passed through the limiting plate (33); a jack (34), wherein a fixed end of the jack (34) abuts against an end of the limit plate (33) away from the first anchor plate (32), and the steel strand (2) is passed through the jack (34); a second anchor plate (35), the second anchor plate (35) being fixedly mounted on the movable end of the jack (34), the second anchor plate (35) being provided with at least one second anchor clip (351), and the steel strand (2) being provided on the second anchor clip (351); A grouting pipe (36), wherein the grouting pipe (36) is passed through the anchor plate (37), and the grouting pipe (36) is connected to the corrugated main pipe (1).

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