A tensioning device for prestressed track slab

Abstract

The present invention relates to the technical field of track plate tensioning, and specifically to a tensioning device for a prestressed track plate, comprising a base plate, two groups of cross beams and two groups of force transmission piers, the two groups of cross beams are respectively fixedly mounted on the top surface of the base plate near the two ends, the two groups of force transmission piers are respectively fixedly mounted at the front and rear ends between the two groups of cross beams, one group of cross beams is provided with jacks at the front and rear positions on one side away from the force transmission piers, the two groups of jacks are fixedly provided with abutment frames on one end away from the cross beams, and a centering straightening mechanism is commonly provided between the two groups of cross beams near one side; the present invention not only assists in the centering and straightening of a prefabricated hollow mold, but also automatically aligns and straightens the ends of several groups of inserted steel bars, so as to assist in the efficient operation of subsequent tensioning, and at the same time can reduce the influence of the internal force condition of the track plate on the arbitrary movement of the prefabricated mold during the tensioning movement, thereby further improving the tensioning efficiency of the track plate.

Description

Technical Field

[0001] The invention relates to the technical field of track slab tensioning, and in particular to a prestressed track slab tensioning device. Background Art

[0002] In the manufacturing process of high-speed railway track slabs, after the track slab steel bars are tensioned and poured and solidified, the prestressed steel bars distributed laterally in the track slab mold are released after curing;

[0003] In the process of laying out the track slab, the following problems are prone to occur:

[0004] (1) When pouring concrete slurry into the prefabricated hollow mold, if the frame is placed in an offset position, it will not only cause the inserted steel bars to tilt, affecting the subsequent stretching and tensioning, but also cause the lengths of the steel bars extending to both ends of the prefabricated hollow mold to be inconsistent, thereby affecting the subsequent cutting effect of the steel bars;

[0005] (2) After the concrete in the precast hollow mold solidifies, the steel bars are tensioned and stretched. As the traction force of the steel bars increases, the precast hollow mold is likely to move, and the cast track plate inside it will move arbitrarily, increasing the risk of damage to the cast plate and reducing the tensioning efficiency.

[0006] In view of the technical defects in this aspect, a solution is now proposed. Summary of the invention

[0007] The purpose of the present invention is to provide a prestressed track plate tensioning device, which can assist the centering and straightening of the precast hollow mold while automatically aligning and straightening the ends of several groups of inserted steel bars to facilitate the efficient operation of subsequent tensioning. At the same time, it can reduce the influence of arbitrary movement of the precast mold during the tensioning movement on the internal stress of the track plate, thereby further improving the tensioning efficiency of the track plate.

[0008] The purpose of the present invention can be achieved through the following technical solutions: a tensioning device for a prestressed track plate, comprising a bottom plate, two groups of cross beams and two groups of force transmission piers, the two groups of cross beams are respectively fixedly mounted on the top surface of the bottom plate near the two ends, the two groups of force transmission piers are respectively fixedly mounted at the front and rear ends between the two groups of cross beams, one group of cross beams is provided with jacks at the front and rear positions on one side away from the force transmission piers, the two groups of jacks are fixedly provided with abutment frames on one end away from the cross beams, a centering straightening mechanism is commonly provided between the two groups of cross beams near one side, and a limited abutment assembly is provided between the two groups of cross beams near the other side;

[0009] Among them, the centering and straightening mechanism includes a concave movable frame and an L-shaped movable frame, the concave movable frame is arranged through the front end position inside one group of the beams, and one end of the concave movable frame extends between the two groups of beams, the L-shaped movable frame is fixedly arranged at the rear end position of the beam on the same side of the concave movable frame, and one end of the L-shaped movable frame extends to near the other group of beams, a cylinder is arranged at the front end on the side of the beam away from the jack side, and a push rod is arranged at the output end of the cylinder, the end of the push rod away from the cylinder is fixedly connected to the inner wall of the side of the concave movable frame extending outward, and an alignment component is arranged on the top surface of the concave movable frame at the end extending outward.

[0010] Furthermore, round shafts are fixedly installed on the top surface of the concave movable frame and the top surface of the L-shaped movable frame near the side wall of the beam, and the two groups of the round shafts are jointly sleeved with a stop bar on the outside, and the center of the bottom of the stop bar is hinged to the surface of the bottom plate, and the front and rear ends of the stop bar are provided with inner grooves, and the two groups of the round shafts slide inside the two groups of inner grooves respectively.

[0011] Furthermore, the alignment component includes several groups of convex inserts, which are respectively fixedly installed on the top surface of one end of the concave movable frame extending outward, and a circular baffle is provided at the middle interface inside the convex insert, and a spring damping shock absorber is jointly provided between the center of one side of the circular baffle and the corresponding inner wall of the convex insert, and horizontal bars are fixedly installed on the inner wall of the convex insert at the upper and lower ends and both sides of the spring damping shock absorber.

[0012] Furthermore, the circular baffle is provided with limiting grooves at the upper and lower ends and both sides, and a wedge-shaped stop block is slidably connected to the middle section of the limiting groove, and two spring damping shock absorbers are commonly arranged between the bottom of each group of the wedge-shaped stop blocks and the corresponding inner wall of the bottom of the limiting groove, and a vertical pole is fixedly installed at the center of one side of the wedge-shaped stop block away from the horizontal bar, and the vertical pole is arranged outside the limiting groove.

[0013] Furthermore, a limiting cylinder is fixedly provided through the center of one side of the L-shaped movable frame away from the resistance bar, and both ends of the limiting cylinder are connected to the outside, a T-shaped resistance cylinder is provided through one end of the limiting cylinder, and one end of the T-shaped resistance cylinder extends to the outside of the limiting cylinder, and a spring coil is wound around the cylinder body outside the limiting cylinder outside the T-shaped resistance cylinder.

[0014] Furthermore, the limiting abutment assembly includes a concave clamping frame, which is fixedly installed at the center of the side wall of another group of cross beams, and a vertical plate is hinged at the opening of the concave clamping frame, and the upper and lower ends of the vertical plate are respectively hinged with a push bar 1 and a push bar 2, and one end of the push bar 1 passes through the interior of the cross beam and is fixedly connected to the side wall of the abutment frame, and one end of the push bar 2 extends to the T-shaped abutment tube and is hinged to the end of the T-shaped abutment tube.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention is to set a centering and straightening mechanism, first use a cylinder to drive the concave movable frame to move, and one side of the concave movable frame moves toward the side of the prefabricated empty frame, and the circular shaft on the same side moves synchronously with the concave movable frame, and pulls the front end of the push bar to move, forcing the push bar to rotate counterclockwise, and the rear end of the push bar pulls the L-shaped movable frame to move in the opposite direction, and the end frame edge thereof continuously moves toward the other side of the prefabricated empty frame until the concave movable frame and the L-shaped movable frame jointly press against the two ends of the prefabricated hollow mold, so as to center and straighten the prefabricated hollow mold and reduce the influence on the subsequent release effect;

[0017] At the same time, the alignment components are utilized, the convex insertion cylinder moves with the concave movable frame and approaches the side walls of the beam respectively, the ends of several groups of steel bars are respectively inserted into the corresponding convex insertion cylinders, the ends of the steel bars are abutted against the circular baffles, the cross bars gradually move toward the corresponding limit grooves, the ends of the cross bars continuously press against the inclined surface of the wedge-shaped block, forcing the wedge-shaped block and the vertical pole to settle, the spring damping shock absorber is compressed twice, and the four groups of vertical poles jointly press against the ends of the steel bars, assist in straightening the ends of the steel bars and aligning the ends of several groups of steel bars, thereby further improving the tensioning efficiency.

[0018] 2. The present invention also sets a limiting resistance component, which cooperates with the centering straightening mechanism. The jack presses the resistance frame, and one side of the resistance frame presses several groups of nuts at the same time, thereby pulling the corresponding steel bars to stretch, and the steel bar segments inside the prefabricated track plate are released. At the same time, the resistance frame pulls the push bar one end to move synchronously, and under the action of the traction force, the vertical plate is forced to deflect clockwise, so that the bottom end of the vertical plate pushes the push bar two and the T-shaped resistance cylinder to move, and the T-shaped resistance cylinder is gradually inserted into the limit cylinder, the spring group coil is compressed, and one end of the T-shaped resistance cylinder presses the side of the prefabricated empty frame, which can reduce the internal force of the track plate caused by the arbitrary movement of the prefabricated mold during the release movement, and effectively improve the release efficiency of the track plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 A top view of the overall structure of the present invention;

[0022] Figure 3 It is a three-dimensional schematic diagram of the combination of the centering and righting mechanism and the crossbeam structure of the present invention;

[0023] Figure 4 is a cross-sectional view of an alignment assembly of the present invention;

[0024] Figure 5 is a side sectional view of an alignment assembly of the present invention;

[0025] Figure 6 It is a half-section view of the combination of the abutment frame, the cross beam, the limiting cylinder and the limiting abutment assembly of the present invention.

[0026] In the figure: 1, bottom plate; 2, cross beam; 3, force transmission pier; 4, jack; 5, stop frame; 6, centering and straightening mechanism; 61, concave movable frame; 62, L-shaped movable frame; 63, cylinder; 64, push rod; 65, alignment assembly; 651, convex insert cylinder; 652, circular baffle; 653, spring damping shock absorber 1; 654, cross bar; 655, limiting groove; 656, wedge-shaped stop block; 657, spring damping shock absorber 2; 658, vertical rod; 66, round shaft; 67, stop bar; 68, inner groove; 69, limiting cylinder; 610, T-shaped stop cylinder; 611, spring assembly coil; 7, stop assembly; 71, concave clamping frame; 72, vertical plate; 73, push bar 1; 74, push bar 2. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example 1: Please refer to Figure 1 - Figure 6 As shown, a tensioning device for a prestressed track plate comprises a bottom plate 1, two groups of cross beams 2 and two groups of force transfer piers 3. The two groups of cross beams 2 are respectively fixedly mounted on the top surface of the bottom plate 1 near the two ends, and the two groups of force transfer piers 3 are respectively fixedly mounted at the front and rear ends between the two groups of cross beams 2. A jack 4 is arranged at the front and rear positions on one side of one group of cross beams 2 away from the force transfer piers 3, and a support frame 5 is fixedly mounted on one end of the two groups of jacks 4 away from the cross beams 2. First, a group of prefabricated hollow molds are built between the two groups of cross beams 2, and then a single or a single bundle of steel bars are sequentially passed through the interior of the cross beams 2, the prefabricated hollow molds and the support frame 5, and both ends of the steel bars are extended to the outside;

[0029] A centering straightening mechanism 6 is commonly provided near one side between the two groups of beams 2. The centering straightening mechanism 6 includes a concave movable frame 61 and an L-shaped movable frame 62. The concave movable frame 61 is provided through the front end position inside one group of beams 2, and one end of the concave movable frame 61 extends between the two groups of beams 2. The L-shaped movable frame 62 is fixedly provided at the rear end position of the beam 2 on the same side of the concave movable frame 61, and one end of the L-shaped movable frame 62 extends to the position near the other group of beams 2. A cylinder 63 is provided at the front end of the side of the beam 2 away from the jack 4 side.

[0030] A push rod 64 is provided at the output end of the cylinder 63, and one end of the push rod 64 away from the cylinder 63 is fixedly connected to the inner wall of one side of the concave movable frame 61 extending outward, and an alignment component 65 is provided on the top surface of the concave movable frame 61 at the end extending outward; a round shaft 66 is fixedly installed on the top surface of the concave movable frame 61 and the top surface of the L-shaped movable frame 62 near the side wall of the crossbeam 2, and the outside of the two groups of round shafts 66 are jointly sleeved with a push bar 67, and the bottom center of the push bar 67 is hinged to the surface of the bottom plate 1, and the front and rear ends of the push bar 67 are both provided with inner grooves 68, and the two groups of round shafts 66 slide inside the two groups of inner grooves 68 respectively;

[0031] Start the cylinder 63, which drives the push rod 64 to contract and pull the concave movable frame 61, and one side of the concave movable frame 61 moves toward the side of the prefabricated empty frame, and the circular shaft 66 on the same side moves synchronously with the concave movable frame 61, and pulls the front end of the abutment bar 67 to move, forcing the abutment bar 67 to rotate counterclockwise, and the rear end of the abutment bar 67 deflects and pulls the L-shaped movable frame 62 to move in the opposite direction, and the end frame edge of the L-shaped movable frame 62 continuously moves toward the other side of the prefabricated hollow mold until the concave movable frame 61 and the L-shaped movable frame 62 jointly press the two ends of the prefabricated hollow mold to achieve the centering of the prefabricated hollow mold, so as to reduce the position deviation of the prefabricated hollow mold and affect the casting of the track plate and the subsequent release and cutting of the steel bars, thereby improving the production efficiency of the track plate.

[0032] Example 2: Please refer to Figure 2 - Figure 4 As shown, the alignment assembly 65 includes a plurality of groups of convex inserts 651, which are respectively fixedly mounted on the top surface of one end of the concave movable frame 61 extending outward, and a circular baffle 652 is provided at the middle interface inside the convex insert 651, and a spring damping shock absorber 653 is provided between the center of one side of the circular baffle 652 and the corresponding inner wall of the convex insert 651;

[0033] The inner wall of the convex insert 651 is fixedly installed with horizontal bars 654 at the upper and lower ends and both sides of the spring damping shock absorber 1 653. The upper and lower ends and both sides of the circular baffle 652 are provided with limiting grooves 655, and the middle section of the limiting groove 655 is slidably connected with a wedge-shaped stopper 656. A spring damping shock absorber 2 657 is commonly arranged between the bottom of each group of wedge-shaped stoppers 656 and the inner wall of the bottom of the corresponding limiting groove 655. A vertical rod 658 is fixedly installed at the center of the side of the wedge-shaped stopper 656 away from the horizontal bar 654, and the vertical rod 658 is arranged outside the limiting groove 655.

[0034] During the movement of the concave movable frame 61, several groups of convex insert cylinders 651 move accordingly and approach the side walls of the beam 2 respectively. The ends of several groups of steel bars are respectively inserted into the corresponding convex insert cylinders 651. When the ends of the steel bars are inserted into the middle section of the convex insert cylinders 651, they abut against the center of the circular baffle 652 and push the circular baffle 652 to move. The spring damping shock absorber 653 is compressed, and the cross bar 654 gradually moves toward the corresponding limit groove 655. The end of the cross bar 654 continuously presses against the tilt of the wedge-shaped block 656. The inclined surface forces the wedge-shaped stopper 656 and the vertical rod 658 to settle, the spring damping shock absorber 657 is compressed, and the four vertical rods 658 simultaneously move toward the center of the circular baffle 652 and jointly press the ends of the steel bars to assist in straightening the ends of the steel bars to reduce the situation where the ends are bent and affect the penetration of the nuts. Meanwhile, several groups of convex inserts 651 simultaneously press one end of the steel bars, forcing the ends of several groups of steel bars to be aligned, and the lengths reserved at both ends of the steel bars for the nut connection remain the same, so as to facilitate the stretching and cutting;

[0035] After the position of the prefabricated hollow mold is adjusted to the center and the ends of several groups of steel bars are aligned, the ends of each group of steel bars are respectively installed with suitable nuts, and the nuts are respectively attached to the corresponding cross beam 2 or the side wall of the frame 5, thereby further limiting the position of the steel bars, and then the prepared concrete slurry is injected into the prefabricated hollow mold until the slurry solidifies and takes shape.

[0036] Example 3: Please refer to Figure 6 As shown, a limiting cylinder 69 is fixedly provided at the center of one side of the L-shaped movable frame 62 away from the stop bar 67, and both ends of the limiting cylinder 69 are connected to the outside, a T-shaped stop cylinder 610 is provided at one end of the limiting cylinder 69, and one end of the T-shaped stop cylinder 610 extends to the outside of the limiting cylinder 69, and a spring coil 611 is wound around the cylinder outside the T-shaped stop cylinder 610 and located outside the limiting cylinder 69;

[0037] A limited abutment assembly 7 is provided between the two groups of beams 2 near the other side, and the limited abutment assembly 7 includes a concave clamping frame 71, the concave clamping frame 71 is fixedly installed at the center of the side wall of the other group of beams 2, and a vertical plate 72 is hinged at the opening of the concave clamping frame 71, and a push bar 1 73 and a push bar 2 74 are hinged at the upper and lower ends of the vertical plate 72, and one end of the push bar 1 73 passes through the interior of the beam 2 and is fixedly connected to the side wall of the abutment frame 5, and one end of the push bar 2 74 extends to the T-shaped abutment cylinder 610 and is hinged to the end of the T-shaped abutment cylinder 610;

[0038] When the jack 4 is used to press the frame 5, one side of the frame 5 presses several groups of nuts at the same time, and the several groups of nuts respectively pull the corresponding steel bars to stretch, thereby realizing the tensioning of the steel bar segments inside the prefabricated track plate. At the same time, the frame 5 pulls one end of the push bar 1 73 to move synchronously, and under the action of the traction force, forces the vertical plate 72 to rotate clockwise, so that the bottom end of the vertical plate 72 pushes the push bar 2 74 and the T-shaped resistance cylinder 610 to move, and the T-shaped resistance cylinder 610 is gradually inserted into the limit cylinder 69, the spring coil 611 is compressed, and one end of the T-shaped resistance cylinder 610 presses the side of the prefabricated empty frame, thereby reducing the internal force of the track plate affected by the arbitrary movement of the prefabricated mold during the tensioning movement, and further improving the tensioning efficiency.

[0039] Additionally, the present invention further provides an operating method for a tensioning device of a prestressed track slab, the method specifically comprising the following steps:

[0040] Step 1: First, a set of prefabricated hollow molds are built between the two sets of beams 2, and then a single steel bar is passed through the beam 2, the prefabricated hollow mold and the inside of the frame 5 in sequence, with the ends of the steel bar extending outside;

[0041] Step 2: Start the cylinder 63 again, which drives the push rod 64 to contract and pull the concave movable frame 61 to move, and one side of the concave movable frame 61 moves toward the side of the prefabricated empty frame, and the circular shaft 66 on the same side moves synchronously with the concave movable frame 61, and pulls the front end of the bar 67 to move, forcing the bar 67 to rotate counterclockwise, and the rear end of the bar 67 deflects, and pulls the L-shaped movable frame 62 to move in the opposite direction, and the end frame edge thereof continuously moves toward the other side of the prefabricated empty frame until the concave movable frame 61 and the L-shaped movable frame 62 jointly press against the two ends of the prefabricated hollow mold, so as to center the prefabricated hollow mold;

[0042] Step 3: Several groups of convex inserts 651 move with the concave movable frame 61 and approach the side wall of the beam 2 respectively. The ends of several groups of steel bars are respectively inserted into the corresponding convex inserts 651. The ends of the steel bars abut against the circular baffles 652. The horizontal bar 654 gradually moves toward the corresponding limiting groove 655. The ends of the horizontal bar 654 continuously press against the inclined surface of the wedge-shaped block 656, forcing the wedge-shaped block 656 and the vertical rod 658 to settle. The spring damping shock absorber 2 657 is compressed. The four vertical rods 658 jointly press against the ends of the steel bars to assist in straightening the ends of the steel bars and aligning the ends of several groups of steel bars.

[0043] Step 4: After the position of the prefabricated hollow mold is adjusted to the center and the ends of several groups of steel bars are aligned, the ends of each group of steel bars are respectively installed with matching nuts, and the nuts are respectively attached to the corresponding cross beam 2 or the side wall of the frame 5, thereby further limiting the position of the steel bars, and then the prepared concrete slurry is injected into the prefabricated hollow mold until the slurry is solidified;

[0044] Step 5: Then use the jack 4 to press the frame 5, and one side of the frame 5 presses several groups of nuts at the same time, so that the several groups of nuts pull the corresponding steel bars to stretch, and the steel bar segments inside the prefabricated track plate are released. At the same time, the frame 5 pulls one end of the push bar 1 73 to move synchronously, and under the action of the traction force, the vertical plate 72 is forced to rotate clockwise, so that the bottom end of the vertical plate 72 pushes the push bar 2 74 and the T-shaped push tube 610 to move, and the T-shaped push tube 610 is gradually inserted into the inside of the limit tube 69, the spring group coil 611 is compressed, and one end of the T-shaped push tube 610 presses the side of the prefabricated hollow frame to reduce the displacement of the prefabricated hollow mold;

[0045] Step 6: After the tensioning movement is completed, the steel bars extending to both sides of the prefabricated frame are cut off, and then the formed track slab is demoulded.

[0046] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A tensioning device for a prestressed track plate, comprising a base plate (1), two groups of cross beams (2) and two groups of force transfer piers (3), wherein the two groups of cross beams (2) are respectively fixedly mounted on the top surface of the base plate (1) near the two ends, and the two groups of force transfer piers (3) are respectively fixedly mounted at the front and rear ends between the two groups of cross beams (2), wherein a jack (4) is arranged at the front and rear positions on one side of one group of cross beams (2) away from the force transfer piers (3), and a stop frame (5) is fixedly mounted on one end of the two groups of jacks (4) away from the cross beams (2), characterized in that: A centering straightening mechanism (6) is commonly provided between the two groups of cross beams (2) near one side, and a limited resistance component (7) is provided between the two groups of cross beams (2) near the other side; The centering and straightening mechanism (6) comprises a concave movable frame (61) and an L-shaped movable frame (62); the concave movable frame (61) is arranged at a front end position inside one group of the cross beams (2), and one end of the concave movable frame (61) extends between the two groups of cross beams (2); the L-shaped movable frame (62) is fixedly arranged at a rear end position of the cross beam (2) on the same side of the concave movable frame (61), and one end of the L-shaped movable frame (62) extends to a position close to the other group of cross beams (2); a cylinder (63) is arranged at the front end of the side of the cross beam (2) away from the jack (4), and a push rod (64) is arranged at the output end of the cylinder (63); the end of the push rod (64) away from the cylinder (63) is fixedly connected to the inner wall of the side of the concave movable frame (61) extending outward, and an alignment component (65) is arranged at the top surface of the concave movable frame (61) at the end extending outward; The alignment assembly (65) comprises a plurality of groups of convex insert cylinders (651), wherein the plurality of groups of convex insert cylinders (651) are respectively fixedly mounted on the top surface of one end extending outward from the concave movable frame (61), and a circular baffle (652) is provided at the middle interface inside the convex insert cylinder (651), and a spring damping shock absorber (653) is provided between the center of one side of the circular baffle (652) and the inner wall of the corresponding convex insert cylinder (651), and horizontal bars (654) are fixedly mounted on the inner wall of the convex insert cylinder (651) and at the upper and lower ends and both sides of the spring damping shock absorber (653); The circular baffle (652) is provided with limiting grooves (655) at the upper and lower ends and both sides, and a wedge-shaped stopper (656) is slidably connected to the middle section of the limiting groove (655), and a spring damping shock absorber (657) is provided between the bottom of each group of the wedge-shaped stoppers (656) and the inner wall of the bottom of the corresponding limiting groove (655), and a vertical rod (658) is fixedly installed at the center of the side of the wedge-shaped stopper (656) away from the horizontal bar (654), and the vertical rod (658) is provided outside the limiting groove (655); The limiting abutment assembly (7) comprises a concave clamping frame (71), the concave clamping frame (71) being fixedly mounted at the center of the side wall of another group of cross beams (2), and a vertical plate (72) being hingedly connected at the opening of the concave clamping frame (71), and a first push bar (73) and a second push bar (74) being hingedly connected at the upper and lower ends of the vertical plate (72), respectively, and one end of the first push bar (73) passes through the interior of the cross beam (2) and is fixedly connected to the side wall of the abutment frame (5), and one end of the second push bar (74) extends to the T-shaped abutment tube (610) and is hingedly connected to the end of the T-shaped abutment tube (610).

2. A tensioning device for a prestressed track slab according to claim 1, characterized in that: Round shafts (66) are fixedly mounted on the top surfaces of the concave movable frame (61) and the top surfaces of the L-shaped movable frame (62) near the side walls of the cross beam (2); abutment bars (67) are sleeved on the outside of the two groups of round shafts (66); and the bottom center of the abutment bars (67) is hinged to the surface of the bottom plate (1); the abutment bars (67) are provided with inner grooves (68) at the front and rear ends, and the two groups of round shafts (66) slide inside the two groups of inner grooves (68) respectively.

3. The tensioning device for a prestressed track slab according to claim 2, characterized in that: A limiting cylinder (69) is fixedly provided through the center of one side of the L-shaped movable frame (62) away from the stop bar (67), and both ends of the limiting cylinder (69) are connected to the outside. A T-shaped stop cylinder (610) is provided through one end of the limiting cylinder (69), and one end of the T-shaped stop cylinder (610) extends to the outside of the limiting cylinder (69). A spring coil (611) is wound around a cylinder outside the limiting cylinder (69) outside the T-shaped stop cylinder (610).

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