A slow-bonding prestressed tendon support and positioning device

Abstract

This invention provides a support and positioning device for loosely bonded prestressed tendons, comprising multiple support frames and multiple rollers. The support frames are symmetrically distributed on both sides of the same cross-section of the loosely bonded prestressed beam reinforcement skeleton along its width direction. Multiple rollers are rotatably mounted on each support frame, and the rollers on the same support frame are distributed along the length direction of the loosely bonded prestressed beam reinforcement skeleton. Positioning grooves for positioning the loosely bonded prestressed tendons are formed on the support frames or the surface of the rollers. When the support frames are subjected to pressure, they undergo elastic deformation, allowing all the rollers to adhere to the surface of the loosely bonded prestressed tendons. This distributes the supporting force on the loosely bonded prestressed tendons across the rollers, preventing the outer sheath of the loosely bonded prestressed tendons from cracking due to excessive concentration of supporting force.

Description

Technical Field

[0001] This invention relates to the field of prestressed tendon installation technology, and in particular to a support and positioning device for slow-bonding prestressed tendons. Background Technology

[0002] Delayed-bond prestressing is a new type of prestressing technology developed based on bonded and unbonded prestressing techniques. It combines the advantages of convenient construction of unbonded prestressing with the good ductility and superior seismic performance of bonded prestressed structures. During construction, it operates similarly to unbonded prestressing, requiring no drilling, occupying minimal space within beams and slabs, allowing for flexible tensioning end placement, and using simple and easy-to-operate tensioning equipment. Furthermore, after construction, the delay-bonding adhesive gradually hardens, bonding the prestressing tendons to the concrete structure as a whole, without weakening the component's cross-section. Therefore, its fatigue resistance and seismic performance are superior to unbonded prestressing. Delayed-bond prestressing is the third generation of prestressing technology following bonded and unbonded prestressing. It overcomes the disadvantages of bonded prestressing, such as complex construction, difficulty in ensuring the quality of grouting in the ducts, and challenges in tensioning end construction, as well as the shortcomings of unbonded prestressing in seismic resistance and structural systems primarily subjected to dynamic loads. It is the latest prestressing technology developed through scientific research involving materials, structures, and machinery.

[0003] Slow-bonding prestressed tendons consist of prestressed steel strands and an outer sheath. A slow-bonding agent is injected between the prestressed steel strands and the outer sheath. In the construction of slow-bonding prestressed concrete structures, slow-bonding mortar is generally applied along the entire length of the prestressed steel strands before the sheath is wrapped around them. When using the sheathing method described above, the placement and fixation of the outer sheath of the prestressed tendons need to be determined before pouring concrete. After the concrete has reached a certain strength, the post-tensioning of the prestressed steel strands is carried out. Currently, the common practice for fixing the outer sheath of the prestressed tendons is to use binding wire, such as iron wire or steel wire, to tie it to the tie bars or positioning bars of the member. The drawbacks of this approach are: 1) If the outer sheath is not properly secured, it cannot be effectively fixed; 2) Even if the outer sheath is securely secured, the contact area between the outer sheath and the reinforcing steel and binding wire is too small, and vibration of the outer sheath is inevitable during concrete compaction, which can damage the outer sheath, causing some of the lubricating and anti-corrosion material or the slow-bonding mortar to be lost, resulting in weakening or even loss of the function of the prestressed steel reinforcement; 3) When tensioning the prestressed steel strands, the lubricating and anti-corrosion material or the slow-bonding mortar and plastic sheet on the outside of the prestressed steel strands will slip with the steel strands. At this time, the overly tight binding wires can also cause damage to the outer plastic sheet, causing some of the lubricating and anti-corrosion material or the slow-bonding mortar to be lost, resulting in weakening or even loss of the function of the prestressed steel strands, ultimately leading to premature damage to the prestressed tendons, reducing the construction quality and service life of the building.

[0004] Patent publication CN212507073U protects an adjustable loosely bonded prestressed tendon positioning device, comprising two support rods, a horizontal load-bearing positioning bar, and several positioning components. The two support rods are vertically arranged and located on both sides of the same cross section of the loosely bonded prestressed beam reinforcement skeleton. The upper ends of the two support rods are respectively used to fix and connect to the upper row of main reinforcement bars on the loosely bonded prestressed beam reinforcement skeleton. The horizontal load-bearing positioning bar has vertical pupils at both ends that match the diameter of the two support rods and passes through two vertical through holes on the two support rods. Several positioning components are fixed at intervals along the length direction of the horizontal load-bearing positioning bar. The positioning components have U-shaped grooves with the groove openings facing upwards and aligned with the length direction of the loosely bonded prestressed beam reinforcement skeleton. A bundle of loosely bonded prestressed tendons is placed in the groove opening of one U-shaped groove. The above scheme still has the following defects in actual construction: (1) When the slow-bonded prestressing tendon is installed, the slow-bonded prestressing tendon will move in the U-shaped groove of the positioning piece, and the outer sleeve will be at risk of being worn out; (2) The supporting force of the positioning piece on the slow-bonded prestressing tendon is localized, and the slow-bonded prestressing tendon will vibrate when the concrete is vibrated. At this time, the outer sleeve will be broken due to the excessively concentrated supporting force. Summary of the Invention

[0005] Based on the problems existing in the prior art, the present invention aims to solve the technical problem that slow-bonded prestressed tendons have the risk of damage during construction.

[0006] This invention provides a support and positioning device for loosely bonded prestressed tendons, comprising multiple support frames and multiple rollers. The multiple support frames are symmetrically distributed on both sides of the same cross section of the loosely bonded prestressed beam reinforcement skeleton along the width direction. Multiple rollers are rotatably mounted on each support frame, and the multiple rollers on the same support frame are distributed along the length direction of the loosely bonded prestressed beam reinforcement skeleton. When the loosely bonded prestressed tendons are supported, the support frames deform to allow all the rollers to contact the surface of the loosely bonded prestressed tendons.

[0007] The support frame or the surface of the roller has a positioning groove for positioning the loosely bonded prestressing tendon, and the width of the positioning groove matches the outer diameter of the loosely bonded prestressing tendon.

[0008] According to one embodiment of the present invention, the support frame includes:

[0009] A roller frame, wherein multiple sliding grooves are provided on the roller frame, and the multiple sliding grooves are distributed on the roller frame along the length direction of the steel reinforcement skeleton of the slow-bonded prestressed beam;

[0010] Multiple mounting blocks are provided, and the mounting blocks are slidably disposed within the slide groove, and the mounting blocks are capable of sliding in a non-horizontal direction within the slide groove;

[0011] Multiple elastic elements are provided, and the elastic elements are disposed in the slide groove. The two ends of the elastic elements are fixedly connected to the bottom of the slide groove and the mounting block, respectively.

[0012] According to one embodiment of the present invention, the loosely bonded prestressed tendon support and positioning device further includes a load-bearing beam, the two ends of which are detachably connected to the reinforcing bars on both sides of the same cross section of the loosely bonded prestressed tendon skeleton, and a plurality of the support frames are fixedly distributed on the load-bearing beam.

[0013] According to an embodiment of the present invention, the loosely bonded prestressed tendon support positioning device further includes a height adjustment mechanism, the height adjustment mechanism includes two lead screws, the axial direction of the lead screws is vertical, and the two lead screws are respectively rotatably connected to the reinforcing bars on both sides of the same cross section of the loosely bonded prestressed beam reinforcing bar skeleton;

[0014] The load-bearing beam has threaded holes at both ends, and the two lead screws are respectively engaged with the threaded holes at both ends of the load-bearing beam.

[0015] According to one embodiment of the present invention, the height adjustment mechanism further includes at least one first locking nut for cooperating with the lead screw to lock the position of the load-bearing beam.

[0016] According to one embodiment of the present invention, the height adjustment mechanism further includes two sleeve rods corresponding one-to-one with the two lead screws, one end of the sleeve rod being fixedly connected to the reinforcing bar, and the other end being rotatably connected to the corresponding lead screw.

[0017] According to one embodiment of the present invention, the loosely bonded prestressed tendon support positioning device further includes an angle adjustment mechanism, the angle adjustment mechanism including a rotating shaft, a crank, a special-shaped connecting rod and a sleeve nut, the rotating shaft being rotatably mounted on the load-bearing beam, and the axial direction of the rotating shaft being parallel to the width direction of the loosely bonded prestressed beam steel reinforcement skeleton; a plurality of the support frames are fixedly mounted on the rotating shaft along the axial direction of the rotating shaft;

[0018] One end of the crank is fixedly connected to the shaft, and the other end is hinged to one end of the shaped connecting rod. The end of the shaped connecting rod away from the crank is rotatably connected to the sleeve nut, and the shaft coincides with the central axis of the sleeve nut. The sleeve nut is threadedly engaged with one of the lead screws.

[0019] According to one embodiment of the present invention, the angle adjustment mechanism further includes a second locking nut for cooperating with the lead screw to lock the position of the sleeve nut.

[0020] According to one embodiment of the present invention, the load-bearing beam includes two load-bearing support beams, which are detachably connected to the reinforcing bars on both sides of the same cross section of the prestressed beam reinforcement skeleton. The rotating shaft is arranged across the two load-bearing support beams, and the two ends of the rotating shaft are respectively rotatably arranged on the two load-bearing support beams.

[0021] According to one embodiment of the present invention, the loosely bonded prestressed tendon support and positioning device further includes a plurality of shock-absorbing sleeves corresponding one-to-one with the rollers, and the shock-absorbing sleeves are fixedly disposed on the surface of each roller.

[0022] The slow-bonding prestressed tendon support and positioning device provided by the present invention has the following beneficial effects:

[0023] (1) The present invention provides a support and positioning device for the slow-bonded prestressed tendon, which can provide support for the slow-bonded prestressed tendon before tensioning, and the positioning groove can position the slow-bonded prestressed tendon.

[0024] (2) When the support frame is subjected to pressure, it will produce elastic deformation so that all of the rollers can fit against the surface of the loosely bonded prestressing tendon, so that the supporting force on the loosely bonded prestressing tendon is distributed on the rollers, so as to avoid the outer sleeve of the loosely bonded prestressing tendon from breaking due to excessive concentration of supporting force.

[0025] (3) Compared with the sliding friction of the slow-bonded prestressing tendon during installation in the prior art, by rotating the roller on the support frame, the sliding friction can be converted into rolling friction, which greatly reduces the friction and can reduce or even eliminate the risk of the slow-bonded prestressing tendon outer sleeve being worn through.

[0026] (4) When tensioning the slow-bonded prestressed steel bars, the rotating rollers will not hinder the outer sleeve from sliding with the slow-bonded prestressed steel bars, thereby avoiding the occurrence of the outer sleeve breaking due to excessively tight binding in the prior art. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments or prior art, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the state of the slow-bonded prestressed tendons before tensioning in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of a slow-bonding prestressed tendon support and positioning device provided by the present invention;

[0030] Figure 3 This is a schematic diagram showing the positional relationship between the support frame and the rollers in an embodiment of the present invention.

[0031] Reference numerals: 100-slow-bonded prestressed tendon; 200-reinforcing bar; 1-support frame; 11-roller frame; 12-mounting block; 13-elastic element; 2-roller; 3-load-bearing beam; 31-load-bearing support beam; 4-height adjustment mechanism; 41-screw rod; 42-first locking nut; 43-sleeve rod; 5-angle adjustment mechanism; 51-rotating shaft; 52-crank; 53-irregular connecting rod; 54-sleeve nut; 55-second locking nut. Detailed Implementation

[0032] The following descriptions of the embodiments are with reference to the accompanying illustrations, illustrating specific embodiments in which the invention can be implemented. Directional terms used in this invention, such as [up], [down], [front], [back], [left], [right], [inner], [outer], [side], etc., are merely for reference to the accompanying illustrations. Therefore, the directional terms used are for illustrating and understanding the invention, and not for limiting the invention. In the figures, structurally similar units are denoted by the same reference numerals.

[0033] This invention provides a support and positioning device for slow-bonding prestressed tendons, such as... Figure 1 The diagram shown is a schematic representation of the state of the loosely bonded prestressed tendon before tensioning in an embodiment of the present invention. Figure 2 The slow-bonding prestressed tendon support and positioning device shown is installed on Figure 1 The cross-section of the loosely bonded prestressed tendon support and positioning device includes multiple support frames 1 and multiple rollers 2. The multiple support frames 1 are symmetrically distributed on both sides of the same cross-section of the loosely bonded prestressed beam reinforcement skeleton along the width direction. Multiple rollers 2 are rotatably mounted on each support frame 1, and the multiple rollers 2 on the same support frame 1 are distributed along the length direction of the loosely bonded prestressed beam reinforcement skeleton. When the loosely bonded prestressed tendon 100 is supported, the support frame 1 will undergo elastic deformation so that the multiple rollers 2 can all fit against the surface of the loosely bonded prestressed tendon 100.

[0034] A positioning groove for positioning the loosely bonded prestressing tendon 100 is formed on the support frame 1 or the surface of the roller 2. The width of the positioning groove matches the outer diameter of the loosely bonded prestressing tendon 100. Specifically, the positioning groove can be a first positioning groove formed at the top of the support frame 1 along the length direction of the loosely bonded prestressed beam reinforcement skeleton, and the installation height of the roller 2 on the support frame 1 is lower than the height of the opening end of the first positioning groove; alternatively, it can be a second positioning groove formed on the surface of the roller 2. In this embodiment, the positioning groove is formed on the surface of the roller 2.

[0035] Compared with the prior art, the present invention provides a support and positioning device for the loosely bonded prestressed tendon 100 before tensioning, which can provide support for the loosely bonded prestressed tendon 100, and the positioning groove can position the loosely bonded prestressed tendon 100; secondly, when the support frame 1 is subjected to pressure, it will generate elastic deformation so that the multiple rollers 2 can all be in contact with the surface of the loosely bonded prestressed tendon 100, so that the supporting force on the loosely bonded prestressed tendon 100 is distributed on the multiple rollers 2, thereby avoiding the rupture of the outer sleeve of the loosely bonded prestressed tendon 100 due to excessive concentration of supporting force; furthermore... In addition, compared with the sliding friction experienced by the loosely bonded prestressed tendon 100 during installation in the prior art, by rotating the roller 2 on the support frame 1, the sliding friction can be converted into rolling friction, which greatly reduces the friction force and can reduce or even eliminate the risk of the outer tube of the loosely bonded prestressed tendon 100 being worn through. Furthermore, when tensioning the loosely bonded prestressed tendon, the rotating roller 2 will not hinder the outer tube from sliding with the loosely bonded prestressed tendon 100, thereby avoiding the occurrence of the outer tube breaking due to excessively tight binding in the prior art.

[0036] like Figure 3 The diagram shows the positional relationship between the support frame 1 and the roller 2 in an embodiment of the present invention. Specifically, the support frame 1 includes a roller frame 11, multiple mounting blocks 12, and multiple elastic elements 13. The roller frame 11 has multiple sliding grooves distributed along the length of the prestressed steel reinforcement skeleton of the loosely bonded beam. The mounting blocks 12 are slidably disposed within the sliding grooves, and the mounting blocks 12 can slide in a non-horizontal direction within the sliding grooves. The elastic elements 13 are disposed within the sliding grooves, and both ends of the elastic elements 13 are fixedly connected to the bottom of the sliding groove and the mounting blocks 12, respectively. In a specific embodiment, the elastic element 13 is a spring.

[0037] It is understood that when supporting the loosely bonded prestressed tendon 100, the elastic element 13 will undergo elastic deformation, so that the corresponding roller 2 is in contact with the surface of the loosely bonded prestressed tendon 100, thereby distributing the supporting force on the loosely bonded prestressed tendon 100 across multiple rollers 2; at the same time, when the surrounding environment vibrates, such as during concrete vibration, the elastic element 13 can buffer the vibration received by the loosely bonded prestressed tendon, so as to avoid the outer sleeve from breaking due to the vibration of the loosely bonded prestressed tendon 100.

[0038] It should be noted that, in addition to setting the support frame 1 to the structure described above, the support frame 1 can also be set to other structures, such as the hinge assembly of a folding screen. However, since the hinge assembly of a folding screen is only used to open or fold the two sides of the flexible screen, when used in this embodiment, it can only provide support from both sides. In contrast, the multiple rollers 2 in this embodiment can provide multi-point support for the loosely bonded prestressed tendons 100. Obviously, the technical solution of this embodiment is superior.

[0039] According to an embodiment of the present invention, in order to further improve the damping effect, the loosely bonded prestressed tendon support positioning device further includes a plurality of damping sleeves corresponding one-to-one with the rollers 2, and the damping sleeves (not shown in the figure) are fixedly provided on the surface of each roller 2.

[0040] Please continue to refer to Figure 2 According to an embodiment of the present invention, the loosely bonded prestressed tendon support positioning device further includes a load-bearing beam 3, the two ends of which are detachably connected to the reinforcing bars 200 on both sides of the same cross section of the loosely bonded prestressed tendon skeleton, and a plurality of the support frames 1 are fixedly distributed on the load-bearing beam 3.

[0041] According to an embodiment of the present invention, in order to match the loosely bonded prestressed tendons 100 at different installation heights and to provide effective support for them, the loosely bonded prestressed tendon support positioning device further includes a height adjustment mechanism 4. The height adjustment mechanism 4 includes two lead screws 41, the axial direction of which is vertical. The two lead screws 41 are rotatably connected to the reinforcing bars 200 on both sides of the same cross section of the loosely bonded prestressed beam reinforcing bar skeleton. Threaded holes are respectively opened at both ends of the load-bearing beam 3, and the two lead screws 41 are respectively engaged with the threaded holes at both ends of the load-bearing beam 3.

[0042] It is understandable that, since the two threaded rods 41 are rotatably connected to the reinforcing bars 200 on both sides of the same cross section of the prestressed beam reinforcement skeleton, and the two threaded rods 41 are respectively engaged with the threaded holes at both ends of the load-bearing beam 3, rotating the threaded rods 41 can adjust the position of the load-bearing beam 3. Since the height of the prestressed tendons will be different during the installation process and after fixing, by setting the height of the load-bearing beam 3 to be adjustable, it can provide support and positioning for the prestressed tendons 100 at different height positions.

[0043] It should be noted that adjusting the height of the load-bearing beam 3 by engaging the lead screw 41 with the threaded hole on the load-bearing beam 3 is only a preferred embodiment of the present invention. In other embodiments, the height of the load-bearing beam 3 can also be achieved in other ways. For example, a lifting drive can be fixedly installed on the reinforcing bar 200, and the output end of the lifting drive can be fixedly connected to the load-bearing beam 3. The lifting drive can be a cylinder, a hydraulic cylinder, or an electric push rod.

[0044] According to one embodiment of the present invention, the height adjustment mechanism 4 further includes at least one first locking nut 42 for cooperating with the lead screw 41 to lock the position of the load-bearing beam 3.

[0045] According to an embodiment of the present invention, in order to connect the lead screw 41 to the reinforcing bar 200, the height adjustment mechanism 4 further includes two sleeve rods 43 corresponding to the two lead screws 41 one by one. One end of the sleeve rod 43 is fixedly connected to the reinforcing bar 200, and the other end is rotatably connected to the corresponding lead screw 41.

[0046] According to an embodiment of the present invention, in order to adjust the angle of the support frame 1 according to the bending state of the loosely bonded prestressing tendon 100 so that the supporting force on the loosely bonded prestressing tendon 100 is relatively evenly distributed on the plurality of rollers 2 on the same support frame 1, the loosely bonded prestressing tendon support positioning device further includes an angle adjustment mechanism 5. The angle adjustment mechanism 5 includes a rotating shaft 51, a crank 52, a special-shaped connecting rod 53, and a sleeve nut 54. The rotating shaft 51 is rotatably mounted on the load-bearing beam 3, and the axial direction of the rotating shaft 51 is parallel to the width direction of the steel reinforcement skeleton of the loosely bonded prestressing beam. The plurality of support frames 1 are fixedly mounted on the rotating shaft 51 along the axial direction of the rotating shaft 51.

[0047] One end of the crank 52 is fixedly connected to the rotating shaft 51, and the other end is hinged to one end of the irregular connecting rod 53. The end of the irregular connecting rod 53 away from the crank 52 is rotatably connected to the sleeve nut 54, and the rotating shaft coincides with the central axis of the sleeve nut 54. The sleeve nut 54 is threadedly engaged with one of the lead screws 41.

[0048] It is understood that by rotating the sleeve nut 54 or the lead screw 41, the sleeve nut 54 can be moved along the axial direction of the lead screw 41, and the rotating shaft 51 can be driven to rotate through the irregular connecting rod 53 and the crank 52, so as to simultaneously complete the angle adjustment of multiple support frames 1. Thus, the angle of the support frame 1 can be adjusted according to the bending state of the loosely bonded prestressing tendon 100, so that the supporting force on the loosely bonded prestressing tendon 100 is relatively evenly distributed on multiple rollers 2 on the same support frame 1.

[0049] According to one embodiment of the present invention, in order to maintain the support frame 1 at a fixed angle, it is necessary to lock the position of the sleeve nut 54. The angle adjustment mechanism 5 further includes a second locking nut 55, which is used to cooperate with the lead screw 41 to lock the position of the sleeve nut 54.

[0050] It should be noted that setting the angle adjustment mechanism 5 to cooperate with the sleeve nut 54 and the crank connecting rod mechanism is only a preferred embodiment of the present invention. In other embodiments, the angle adjustment mechanism 5 can also be set in other forms. For example, a rotation drive mechanism can be set, and the output end of the rotation drive mechanism can be directly connected to the rotating shaft 51. In this way, the angle of the support frame 1 can also be adjusted by driving the rotating shaft 51 to rotate. In this embodiment of the present invention, the angle adjustment mechanism 5 is set in the above-described structural form so that the angle adjustment mechanism 5 and the height adjustment mechanism 4 share the same component (lead screw 41), so as to avoid adding other components and making the overall size of the device larger.

[0051] According to an embodiment of the present invention, the load-bearing beam 3 includes two load-bearing support beams 31, which are detachably connected to the reinforcing bars 200 on both sides of the same cross section of the prestressed beam reinforcement skeleton. The rotating shaft 51 is arranged across the two load-bearing support beams 31, and the two ends of the rotating shaft 51 are respectively rotatably arranged on the two load-bearing support beams 31.

[0052] It is understood that by setting the load-bearing beam 3 to include two load-bearing support beams 31 and setting the rotating shaft 51 across the two load-bearing support beams 31, the weight of the device can be reduced and the load-bearing beam 3 can be prevented from interfering with the moving irregular connecting rod 53.

[0053] In summary, the loosely bonded prestressing tendon support and positioning device provided by the present invention can provide support and positioning for multiple loosely bonded prestressing tendons 100. Furthermore, when the support frame 1 is subjected to pressure, it undergoes elastic deformation, allowing multiple rollers 2 to adhere to the surface of the loosely bonded prestressing tendon 100. This distributes the supporting force on the loosely bonded prestressing tendon 100 across the multiple rollers 2, preventing the outer sheath of the loosely bonded prestressing tendon 100 from cracking due to excessively concentrated supporting force. Moreover, the height adjustment mechanism 4 and the angle adjustment mechanism 5 can respectively adjust the height and angle of the loosely bonded prestressing tendon 100, ensuring that the supporting force on the loosely bonded prestressing tendon 100 is relatively evenly distributed across the multiple rollers 2 on the same support frame 1. This provides effective support for the loosely bonded prestressing tendon while also preventing the outer sheath from cracking due to excessive localized supporting force, thus effectively protecting the outer sheath of the loosely bonded prestressing tendon 100.

[0054] It should be noted that although the present invention has been disclosed above with specific embodiments, the above embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A support and positioning device for slow-bonding prestressed tendons, characterized in that, It includes multiple support frames (1) and multiple rollers (2). The multiple support frames (1) are symmetrically distributed on both sides of the same cross section of the prestressed beam reinforcement skeleton along the width direction of the prestressed beam reinforcement skeleton. Multiple rollers (2) are rotatably arranged on each support frame (1), and multiple rollers (2) on the same support frame (1) are distributed along the length direction of the prestressed beam reinforcement skeleton. When the prestressed tendon (100) is supported, the support frame (1) will undergo elastic deformation so that multiple rollers (2) can fit against the surface of the prestressed tendon (100). The roller (2) on the support frame (1) has a positioning groove on its surface for positioning the slow-bonding prestressing tendon (100), and the width of the positioning groove matches the outer diameter of the slow-bonding prestressing tendon (100). The support frame (1) includes: A roller frame (11) is provided with a plurality of sliding grooves, which are distributed along the length of the steel reinforcement skeleton of the slow-bonded prestressed beam on the roller frame (11). Multiple mounting blocks (12) are slidably disposed in the groove, and the mounting blocks (12) can slide in the groove in a non-horizontal direction; Multiple elastic elements (13) are provided in the groove, and the two ends of the elastic elements (13) are fixedly connected to the bottom of the groove and the mounting block (12) respectively.

2. The prestressed tendon support and positioning device according to claim 1, characterized in that, It also includes a load-bearing beam (3), the two ends of which are detachably connected to the steel bars (200) on both sides of the same cross section of the prestressed beam steel skeleton, and multiple support frames (1) are fixedly distributed on the load-bearing beam (3).

3. The prestressed tendon support and positioning device according to claim 2, characterized in that, It also includes a height adjustment mechanism (4), which includes two lead screws (41), the axis of which is vertical, and the two lead screws (41) are rotatably connected to the steel bars (200) on both sides of the same cross section of the prestressed beam steel skeleton. The load-bearing beam (3) has threaded holes at both ends, and the two lead screws (41) are respectively engaged with the threaded holes at both ends of the load-bearing beam (3).

4. The prestressed tendon support and positioning device according to claim 3, characterized in that, The height adjustment mechanism (4) also includes at least one first locking nut (42) for cooperating with the lead screw (41) to lock the position of the load-bearing beam (3).

5. The prestressed tendon support and positioning device according to claim 3, characterized in that, The height adjustment mechanism (4) also includes two sleeves (43) that correspond one-to-one with the two lead screws (41). One end of the sleeve (43) is fixedly connected to the reinforcing bar (200), and the other end is rotatably connected to the corresponding lead screw (41).

6. The prestressed tendon support and positioning device according to claim 3, characterized in that, It also includes an angle adjustment mechanism (5), which includes a rotating shaft (51), a crank (52), a shaped connecting rod (53), and a sleeve nut (54). The rotating shaft (51) is rotatably mounted on the load-bearing beam (3), and the axial direction of the rotating shaft (51) is parallel to the width direction of the steel reinforcement skeleton of the slow-bonded prestressed beam. A plurality of the support frames (1) are fixedly mounted on the rotating shaft (51) along the axial direction of the rotating shaft (51). One end of the crank (52) is fixedly connected to the shaft (51), and the other end is hinged to one end of the shaped connecting rod (53). The end of the shaped connecting rod (53) away from the crank (52) is rotatably connected to the sleeve nut (54), and the shaft coincides with the central axis of the sleeve nut (54). The sleeve nut (54) is threadedly engaged with one of the lead screws (41).

7. The prestressed tendon support and positioning device according to claim 6, characterized in that, The angle adjustment mechanism (5) also includes a second locking nut (55) for cooperating with the lead screw (41) to lock the position of the sleeve nut (54).

8. The prestressed tendon support and positioning device according to claim 6, characterized in that, The load-bearing beam (3) includes two load-bearing support beams (31), which are detachably connected to the steel bars (200) on both sides of the same cross section of the prestressed beam steel reinforcement skeleton. The rotating shaft (51) is set across the two load-bearing support beams (31), and the two ends of the rotating shaft (51) are respectively rotatably set on the two load-bearing support beams (31).

9. The prestressed tendon support and positioning device according to claim 1, characterized in that, It also includes multiple shock-absorbing sleeves that correspond one-to-one with the rollers (2), and the shock-absorbing sleeves are fixedly provided on the surface of each roller (2).

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