A tensioning device for a track slab mold and its usage method

Abstract

The present invention relates to the technical field of prestressed steel bar tensioning devices, and discloses a track slab mold tensioning device and a using method thereof. The device includes: a conveying track for conveying a mold body through a gantry fixedly installed on the ground. A plurality of prestressed steel bars are arranged through the mold body, and anchors are arranged at the positions where the prestressed steel bars penetrate the mold body. In the present invention, the sliding of the special-shaped sleeve on the square tube enables two clamping blocks to move on the square tube through a linkage assembly so as to clamp the prestressed steel bars. The pulling force received by the special-shaped sleeve will also directly act on the nut through the immovable square tube, and the prestressed steel bars are directly pulled through the nut. In this way, when the prestressed steel bars are subjected to a huge pulling force, they can be clamped tighter and tighter by the two clamping blocks, and the opposite movement of the two clamping blocks ensures that the axis of the prestressed steel bars is always stable, avoiding the problem that the axis swings due to the huge pulling force, resulting in a reduction in the tensioning efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of prestressed steel bar tensioning devices, and particularly relates to a tensioning device for a track slab mold and a using method thereof. Background Art

[0002] The tensioning device for a track slab mold is a key device used in the production process of prestressed track slabs. It is mainly used to tension the prestressed steel bars in the track slab mold to ensure the stability and durability of the track slab during use. Such a device usually includes a transverse tensioning unit and a longitudinal tensioning unit, and can tension track slabs of different specifications, improving production efficiency and reducing costs.

[0003] However, there are slight differences in aspects such as the elastic modulus and initial length of each prestressed steel bar. And when tensioning both ends synchronously, there will also be slight differences in the tension magnitudes output at both ends. These situations cause the tensions borne by both ends of the prestressed steel bar during the tensioning process not to be exactly the same. Because of the uneven stress, the steel bar will swing. From a microscopic perspective, the axis of the prestressed steel bar no longer maintains a fixed straight state, but deviates from the ideal straight trajectory, showing a situation of swinging left and right or up and down. The result brought about by this phenomenon is that the transmission of the tension is dispersed, and the tensioning efficiency will thus decrease. More seriously, the stability of the tensioning process will also be affected. Based on this, the present invention purposefully provides a tensioning device for a track slab mold and a using method thereof that can avoid the swinging of the steel bar axis caused by the shaking of the steel bar when tensioning the prestressed steel bar. Summary of the Invention

[0004] The purpose of the present invention is to provide a tensioning device for a track slab mold and a using method thereof in view of the deficiencies of the prior art to solve the technical problems in the prior art.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A tensioning device for a track slab mold includes:

[0007] A gantry, which is fixedly installed on the ground, and an inner lifting frame and an outer lifting frame are sleeved thereon. The inner lifting frame is located inside the outer lifting frame. The inner lifting frame and the outer lifting frame are respectively driven by two driving sources to lift. A first cross beam is fixedly installed around the bottom end of the inner lifting frame, and a plurality of bottom plates are arranged at equal intervals on the first cross beam. A second cross beam is fixedly installed around the bottom end of the outer lifting frame, and a plurality of tensioning components are arranged at equal intervals on the second cross beam;

[0008] The special-shaped sleeve is slidably installed on the bottom plate, and a square tube is slidably installed at one end of the special-shaped sleeve away from the mold body. The tensioning assembly drives the special-shaped sleeve to move through the connecting assembly. Two clamping blocks are slidably installed in the square tube, and their axes coincide with the axis of the special-shaped sleeve. The two clamping blocks are driven by the linkage assembly to move towards each other;

[0009] The conveying track is fixedly installed on the ground and is used to convey the mold body to the gantry. A plurality of prestressed steel bars are arranged through the mold body. Nuts are threadedly connected to both ends of the prestressed steel bars. The nuts abut against one side of the square tube away from the special-shaped sleeve, and their axes coincide with the axis of the square tube. The two clamping blocks are symmetric about the prestressed steel bar;

[0010] When the special-shaped sleeve moves away from the mold body, it moves on the square tube, and drives the two clamping blocks to approach each other through the linkage assembly and clamp the prestressed steel bar. Subsequently, when the special-shaped sleeve continues to move, it will drive the prestressed steel bar to be tensioned by clamping the prestressed steel bar through the two clamping blocks. At the same time, the special-shaped sleeve drives the square tube to move synchronously, and the square tube pushes the nut to tension the prestressed steel bar.

[0011] As a further solution of the present invention: The linkage assembly includes a round wheel, an inclined groove, a slider and a chute. The inclined groove is opened on the special-shaped sleeve, and is inclined. The distance between the end of the inclined groove close to the mold body and the axis of the prestressed steel bar is less than the distance between the end of the inclined groove away from the mold body and the axis of the prestressed steel bar. The chute is opened on the square tube and is vertically arranged. The round wheel is slidably installed in the inclined groove, one end of which is fixedly connected to the clamping block, and the other end of which can be fixedly connected to the slider. The slider is slidably installed in the chute.

[0012] As a further solution of the present invention: The connecting assembly includes a connecting block, a sub-joint, a trapezoidal block and a trapezoidal groove. The trapezoidal groove is opened at one end of the special-shaped sleeve away from the mold body, and the distance between the lower bottom of the trapezoidal groove and the mold body is less than the distance between the upper bottom of the trapezoidal groove and the mold body. A trapezoidal block is fixedly installed on the connecting block, and the trapezoidal block is slidably inserted into the trapezoidal groove. The sub-joint is fixedly installed on the connecting block and is connected to the tensioning assembly. When the connecting block is connected to the special-shaped sleeve, the axis of the sub-joint coincides with the axis of the prestressed steel bar.

[0013] As a further solution of the present invention: The connecting assembly further includes a clamping rod and a clamping block. The clamping block is fixedly installed on the outer surface of the special-shaped sleeve, and the clamping rod is fixedly installed on the connecting block. When the trapezoidal block on the connecting block is slidably inserted into the trapezoidal groove, the clamping rod is slidably clamped with the clamping block.

[0014] As a further solution of the present invention: The nut is threadedly connected to the square tube. When the two clamping blocks clamp and fix the prestressed steel bar, the nut spirally enters the square tube, and at the same time, the nut is screwed into the prestressed steel bar.

[0015] As a further solution of the present invention: all four sides of the mold body correspond to a moving plate, the moving plate is slidably mounted on the inner lifting frame, is driven to move by an output source, and abuts against one end of the special-shaped sleeve facing the mold body, and one end of the square tube located inside the special-shaped sleeve is connected to the special-shaped sleeve through a spring.

[0016] As a further solution of the present invention: a groove is provided on the square tube, and the spring is fixedly connected to the bottom of the groove.

[0017] A method for using a tensioning device of a track slab mold, the method is applied to a tensioning device of a track slab mold as described above, and the method includes the following steps:

[0018] Step S1: The mold body is transported to below the gantry through the conveying track. At this time, a driving source drives the inner lifting frame to descend, so that the bottom plate descends to an appropriate height;

[0019] Step S2: All the prestressed steel bars on the mold body pass through the special-shaped sleeve and the square tube on the bottom plate, and the prestressed steel bars are threadedly connected with nuts. At this time, the nuts abut against the square tube;

[0020] Step S3: The special-shaped sleeves are connected through the connecting components, and then another driving source drives the outer lifting frame to descend to an appropriate height, so that the tensioning components on the outer lifting frame are connected with the connecting components;

[0021] Step S4: The tensioning component drives the special-shaped sleeve away from the mold body through the connecting component. The special-shaped sleeve moves on the square tube, and the special-shaped sleeve drives two clamping blocks to approach each other and clamp the prestressed steel bar through the linkage component;

[0022] Step S5: At this time, when the special-shaped sleeve continues to move, it will drive the prestressed steel bar to be tensioned by clamping the prestressed steel bar through the two clamping blocks. At the same time, the special-shaped sleeve drives the square tube to move synchronously, and the square tube pushes the nut to tension the prestressed steel bar.

[0023] The beneficial effects of the present invention:

[0024] 1. In the present invention, the prestressed steel bar passes through the special-shaped sleeve and the square tube, and the prestressed steel bar is threadedly connected with the nut, so that the nut abuts against the square tube, ensuring that the prestressed steel bar is in a straight state. Subsequently, the tensioning assembly is connected to the square tube through the connecting assembly, and a huge tensile force is directly applied to the special-shaped sleeve. The sliding of the special-shaped sleeve on the square tube causes the two clamping blocks to move on the square tube through the linkage assembly, thereby clamping the prestressed steel bar. Moreover, the clamping force on the prestressed steel bar is proportional to the tensile force received by the special-shaped sleeve, and the clamping blocks are clamped on the prestressed steel bar and cannot move, which directly manifests as the inability of the special-shaped sleeve to move on the square tube. The tensile force received by the special-shaped sleeve will also directly act on the nut through the square tube, and the prestressed steel bar is directly pulled by the nut. In this way, when the prestressed steel bar is subjected to a huge tensile force, it can be clamped tighter and tighter by the two clamping blocks, and the opposite movement of the two clamping blocks ensures that the axis of the prestressed steel bar is always stable, avoiding the problem of reduced tensioning efficiency caused by the axis swing due to the huge tensile force;

[0025] 2. In the present invention, the trapezoidal block on the connecting block is aligned with the trapezoidal groove and inserted into the special-shaped sleeve from top to bottom. At this time, the axis of the sub-joint on the connecting block coincides with the axis of the prestressed steel bar. Subsequently, the tensioning assembly is connected to the sub-joint and pulls the sub-joint. The sub-joint can transmit the force to the connecting block and the special-shaped sleeve, and finally act on the prestressed steel bar. In this way, it is ensured that the transmission path of the force output by the tensioning assembly is straight and stable, which can minimize the dispersion and loss of force, ensure that all the tensioning forces act effectively on the prestressed steel bar, and improve the tensioning efficiency;

[0026] 3. In the present invention, through the design of the threaded connection between the nut and the square tube, it can be ensured that the axis of the nut always coincides with the axis of the prestressed steel bar, thereby ensuring that the axis of the prestressed steel bar is always a horizontal line, which is beneficial to the action of the force of the tensioning assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 is a schematic diagram of the structure after the outer lifting frame descends in the present invention;

[0030] Figure 3 is a schematic diagram of the structure of the inner lifting frame in the present invention;

[0031] Figure 4 is in the present invention Figure 3 is an enlarged schematic diagram of part A in;

[0032] Figure 5 is a schematic diagram of the structure where the prestressed steel bar passes through the special-shaped sleeve in the present invention;

[0033] Figure 6 The present invention Figure 5 A schematic diagram of the structure in cross-section;

[0034] Figure 7 The present invention Figure 6 The enlarged structural diagram of part B in the middle;

[0035] Figure 8 It is a schematic diagram of the connection structure between the prestressed steel bar and the nut in the present invention;

[0036] Figure 9 It is a schematic diagram of the structure of the nut abutting against the square tube in the present invention;

[0037] Figure 10 The present invention Figure 9 A schematic diagram of the structure in cross-section;

[0038] Figure 11 It is a schematic diagram of the structure of the clamping block clamping the prestressed steel bar in the present invention;

[0039] Figure 12 It is a structural schematic diagram of a cross-section of the threaded connection between the nut and the square tube in the present invention;

[0040] Figure 13 It is a structural schematic diagram of the threaded connection between the nut and the square tube in the present invention;

[0041] Figure 14 It is a schematic diagram of the structure of the connection between the connecting block and the special-shaped sleeve in the present invention;

[0042] Figure 15 The present invention Figure 14 A schematic diagram of the structure in cross-section;

[0043] Figure 16 It is a schematic diagram of the structure of the separation of the special-shaped sleeve and the square cylinder in the present invention;

[0044] Figure 17 It is a schematic diagram of the structure of the split clamp block and the square tube in the present invention.

[0045] In the figure: 1. conveying track; 2. mold body; 3. prestressed steel bar; 4. gantry; 5. inner lifting frame; 501. first crossbeam; 6. outer lifting frame; 601. second crossbeam; 7. moving plate; 8. bottom plate; 801. slideway; 9. special-shaped sleeve; 901. flank; 10. square tube; 1001. groove; 11. nut; 12. clamping block; 13. spring; 14. connecting block; 15. sub-joint; 16. trapezoidal block; 17. trapezoidal groove; 18. clamping rod; 19. clamping block; 20. round wheel; 21. inclined groove; 22. slider; 23. slide groove. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0047] Please refer to Figures 1 - 17 As shown in the figure, the present invention is a tensioning device for a track slab mold, including:

[0048] A gantry 4, which is fixedly installed on the ground, and an inner lifting frame 5 and an outer lifting frame 6 are sleeved thereon. The inner lifting frame 5 is located inside the outer lifting frame 6. The inner lifting frame 5 and the outer lifting frame 6 are respectively driven by two driving sources to lift. A first cross beam 501 is fixedly installed around the bottom end of the inner lifting frame 5. A plurality of bottom plates 8 are arranged at equal intervals on the first cross beam 501. A second cross beam 601 is fixedly installed around the bottom end of the outer lifting frame 6. A plurality of tensioning components are arranged at equal intervals on the second cross beam 601;

[0049] A special-shaped sleeve 9, which is slidably installed on the bottom plate 8, and a square tube 10 is slidably installed at one end of the special-shaped sleeve 9 away from the mold body 2. The tensioning component drives the special-shaped sleeve 9 to move through a connecting component. Two clamping blocks 12 are slidably installed in the square tube 10, and their axes coincide with the axis of the special-shaped sleeve 9. The two clamping blocks 12 are driven by a linkage component to move towards each other;

[0050] A conveying track 1, which is fixedly installed on the ground and is used to convey the mold body 2 to the gantry 4. A plurality of prestressed steel bars 3 are arranged through the mold body 2. Both ends of the prestressed steel bars 3 are threadedly connected with nuts 11. The nuts 11 abut against one side of the square tube 10 away from the special-shaped sleeve 9, and their axes coincide with the axis of the square tube 10. The two clamping blocks 12 are symmetric about the prestressed steel bar 3;

[0051] When the special-shaped sleeve 9 moves away from the mold body 2, it moves on the square tube 10, and the special-shaped sleeve 9 drives the two clamping blocks 12 to approach each other and clamp the prestressed steel bar 3 through the linkage component. Subsequently, when the special-shaped sleeve 9 continues to move, it will drive the prestressed steel bar 3 to be tensioned by clamping the prestressed steel bar 3 through the two clamping blocks 12. At the same time, the special-shaped sleeve 9 drives the square tube 10 to move synchronously, and the square tube 10 pushes the nut 11 to tension the prestressed steel bar 3.

[0052] In a case of this embodiment, an anchor is provided at the position where the prestressed steel bar 3 penetrates through the mold body 2. The anchor is used to lock the prestressed steel bar 3 on the mold body 2 after the prestressed steel bar 3 is tensioned. The driving source can be selected from components such as an electric cylinder and an electric telescopic rod, and other mechanisms capable of realizing lifting motion can also be selected. This embodiment does not specifically limit this here; the tensioning assembly includes a hydraulic jack, a guiding system, a displacement sensor, a tensiometer, etc. It should be noted that the above components are all prior arts, and the present invention has not improved them. Therefore, it is not necessary to disclose their specific mechanical structures and circuit structures, which does not affect the integrity of the present invention.

[0053] The working principle of the present invention: The mold body 2 is transported to the lower part of the gantry 4 through the conveying track 1. At this time, a driving source drives the inner lifting frame 5 to descend, so that the bottom plate 8 descends to an appropriate height. At this time, as Figure 5 shown as an example, the prestressed steel bar 3 can pass through the special-shaped sleeve 9 and the square tube 10, and through Figure 6 it can be seen that the two clamping blocks 12 are in a state of being away from the prestressed steel bar 3. Subsequently, as Figure 9 shown as an example, the nut 11 is threadedly connected to the prestressed steel bar 3. At this time, the nut 11 will abut against the square tube 10. If the special-shaped sleeve 9 is subjected to a tensile force and moves away from the mold body 2 at this time, because the square tube 10 is slidably installed in the special-shaped sleeve 9, when the special-shaped sleeve 9 moves away from the mold body 2, it will inevitably drive the square tube 10 to move away from the mold body 2. And the nut 11 abuts against the square tube 10 and is threadedly connected to the prestressed steel bar 3. Therefore, the tensile force can be applied to the prestressed steel bar 3. At this time, the tensile force received by the prestressed steel bar 3 can be regarded as an embodiment of the common threaded connection method. And the square tube 10 is slidably installed in the special-shaped sleeve 9. When the prestressed steel bar 3 is in a straightened state, that is, the positions of the nuts 11 at both ends of the prestressed steel bar 3 do not change without being subjected to a huge tensile force. Therefore, before the special-shaped sleeve 9 drives the square tube 10 to move synchronously, there is a distance during which the special-shaped sleeve 9 moves towards the square tube 10. At this time, the position of the square tube 10 remains unchanged, and when the special-shaped sleeve 9 moves, it drives the two clamping blocks 12 to approach each other through the linkage assembly, thereby clamping the prestressed steel bar 3. The above process is as Figures 10 - 11 shown as an example. When the prestressed steel bar 3 blocks the two clamping blocks 12 from continuing to approach, and the clamping blocks 12 slide on the square tube 10, on the contrary, after the clamping blocks 12 stop moving, they can directly drive the square tube 10 to move synchronously with the special-shaped sleeve 9, and the clamping blocks 12 will also move synchronously with the square tube 10. At this time, the prestressed steel bar 3 not only receives the tensile force generated by the movement of the nut 11, but also the movement of the clamping blocks 12 after clamping the prestressed steel bar 3 will also cause a tensile force on the prestressed steel bar 3, and the clamping force received by the prestressed steel bar 3 from the clamping blocks 12 is proportional to the tensile force received by the special-shaped sleeve 9;

[0054] Based on the above principle, after the nut 11 is threadedly connected to the prestressed steel bar 3, the connecting assembly is connected to the special-shaped sleeve 9. Subsequently, another driving source is used to drive the outer lifting frame 6 to descend to an appropriate height, so that the tensioning assembly on the outer lifting frame 6 is connected to the connecting assembly, thereby applying a huge tensile force to the special-shaped sleeve 9. Until each prestressed steel bar 3 is tensioned to the qualified standard, the prestressed steel bar 3 is fixed to the mold body 2 through the anchor, that is, the tensioning of the prestressed steel bar 3 is completed.

[0055] As Figures 5 - 17 shown, as a preferred embodiment of the present invention, the linkage assembly includes a round wheel 20, an inclined groove 21, a slider 22 and a chute 23. The inclined groove 21 is opened on the special-shaped sleeve 9, which is inclined, and the distance between the end of the inclined groove 21 close to the mold body 2 and the axis of the prestressed steel bar 3 is less than the distance between the end of the inclined groove 21 far from the mold body 2 and the axis of the prestressed steel bar 3. The chute 23 is opened on the square tube 10 and is vertically arranged. The round wheel 20 is slidably installed in the inclined groove 21, one end of which is fixedly connected to the clamping block 12, and the other end of which can be fixedly connected to the slider 22. The slider 22 is slidably installed in the chute 23.

[0056] In the actual application of this embodiment, as Figure 16 shown, the clamping block 12 is slidably installed on the square tube 10 through the slider 22. And as Figure 17 shown, the clamping block 12 and the slider 22 are fixedly connected through the round wheel 20, and the round wheel 20 is slidably installed in the inclined groove 21, and the inclined groove 21 is inclined. When the position of the square tube 10 remains unchanged and the special-shaped sleeve 9 is subjected to a tensile force in the direction away from the mold body 2, it will force the round wheels 20 of the upper and lower clamping blocks 12 to slide in the inclined groove 21, and the sliding trend is to approach each other. The mutual approach of the two round wheels 20 will cause the sliders 22 to slide closer to each other in the chute 23, that is, the two clamping blocks 12 can clamp the prestressed steel bar 3, and under the action of the huge tensile force of the tensioning assembly on the special-shaped sleeve 9, it can make the clamping block 12 clamp the prestressed steel bar 3 tighter and tighter, ensuring sufficient clamping force.

[0057] As Figures 5 - 17 shown, as a preferred embodiment of the present invention, the connecting assembly includes a connecting block 14, a sub-joint 15, a trapezoidal block 16 and a trapezoidal groove 17. The trapezoidal groove 17 is opened at one end of the special-shaped sleeve 9 far from the mold body 2, and the distance between the lower bottom of the trapezoidal groove 17 and the mold body 2 is less than the distance between the upper bottom of the trapezoidal groove 17 and the mold body 2. The trapezoidal block 16 is fixedly installed on the connecting block 14, and the trapezoidal block 16 is slidably inserted into the trapezoidal groove 17. The sub-joint 15 is fixedly installed on the connecting block 14 and is connected to the tensioning assembly. When the connecting block 14 is connected to the special-shaped sleeve 9, the axis of the sub-joint 15 coincides with the axis of the prestressed steel bar 3.

[0058] Among them, a slideway 801 is formed on the bottom plate 8, a side wing 901 is fixedly installed on the special-shaped sleeve 9, and the side wing 901 is slidably installed in the slideway 801.

[0059] In one case of this embodiment, the tensioning assembly further includes a female plug that cooperates with the sub-joint 15, and the female plug is fixedly installed at the movable end of the hydraulic jack. When the sub-joint 15 is inserted into the female plug, the two will be tightly connected and can withstand a great load.

[0060] When this embodiment is actually applied, as Figure 17 shown, align the trapezoidal block 16 on the connecting block 14 with the trapezoidal groove 17 and insert it into the special-shaped sleeve 9 from top to bottom. At this time, the axis of the sub-joint 15 on the connecting block 14 coincides with the axis of the prestressed steel bar 3. Subsequently, the tensioning assembly is connected to the sub-joint 15 and pulls the sub-joint 15. The sub-joint 15 can transmit the force to the connecting block 14 and the special-shaped sleeve 9, and finally act on the prestressed steel bar 3. In this way, it is ensured that the transmission path of the output force of the tensioning assembly is straight and stable, which can minimize the dispersion and loss of force, ensure that all the tensioning forces act effectively on the prestressed steel bar 3, improve the tensioning efficiency, and the trapezoidal design of the trapezoidal groove 17 ensures the stability of the connection between the connecting block 14 and the special-shaped sleeve 9;

[0061] Moreover, due to the restrictive effect of the slideway 801 on the side wing 901 in the longitudinal direction, the force for pulling out the connecting block 14 from the special-shaped sleeve 9 can be resisted, thereby facilitating the separation of the connecting block 14 from the special-shaped sleeve 9.

[0062] As Figures 14 - 17 shown, as a preferred embodiment of the present invention, the connecting assembly further includes a clamping rod 18 and a clamping block 19. The clamping block 19 is fixedly installed on the outer surface of the special-shaped sleeve 9, and the clamping rod 18 is fixedly installed on the connecting block 14. When the trapezoidal block 16 on the connecting block 14 is slidably inserted into the trapezoidal groove 17, the clamping rod 18 and the clamping block 19 are slidably clamped.

[0063] When this embodiment is actually applied, as Figure 14 shown as an example, when the clamping rod 18 and the clamping block 19 are slidably clamped, when the tensioning assembly pulls the connecting block 14 to move, the clamping point of the clamping rod 18 and the clamping block 19 can provide multiple additional support points for the connecting block 14 and the square tube 10, improving the stability of the connection between the connecting block 14 and the special-shaped sleeve 9.

[0064] As Figures 4 - 17 shown, as a preferred embodiment of the present invention, the nut 11 is threadedly connected to the square tube 10. When the two clamping blocks 12 clamp and fix the prestressed steel bar 3, the nut 11 is screwed into the square tube 10, and at the same time, the nut 11 is screwed into the prestressed steel bar 3.

[0065] In actual application of this embodiment, since the square tube 10 and the nut 11 are only in an abutting connection relationship, when the square tube 10 abuts against the nut 11, the nut 11 will shift, resulting in the misalignment of the axis of the nut 11 and the axis of the prestressed steel bar 3 and unstable tensioning. However, through the design of threading the nut 11 and the square tube 10, it can be ensured that the axis of the nut 11 always coincides with the axis of the prestressed steel bar 3, thereby ensuring that the axis of the prestressed steel bar 3 is always a horizontal line, which is beneficial to the action of the tensioning assembly force;

[0066] At this time, the steps of installing the nut 11 need to be changed. As Figure 5 shown, at this time, the prestressed steel bar 3 passes through the special-shaped sleeve 9 and the square tube 10, and then as Figure 9 shown, after partially threading the nut 11 and the prestressed steel bar 3, it abuts against the square tube 10. The detailed situation is as Figure 10 shown, and then as Figure 11 shown, manually move the special-shaped sleeve 9 close to the square tube 10 so that the clamping block 12 clamps and fixes the prestressed steel bar 3. At this time, as Figure 12 shown, the nut 11 can be manually rotated into the square tube 10 while completely threading the nut 11 and the prestressed steel bar 3.

[0067] As Figures 3 - 17 shown, as a preferred embodiment of the present invention, all four sides of the mold body 2 correspond to a moving plate 7. The moving plate 7 is slidably installed on the inner lifting frame 5, and is driven by an output source to move, and it abuts against one end of the special-shaped sleeve 9 facing the mold body 2. One end of the square tube 10 located inside the special-shaped sleeve 9 is connected to the special-shaped sleeve 9 through a spring 13.

[0068] In one case of this embodiment, the output source can be selected from components such as electric cylinders and electric telescopic rods, and other mechanisms capable of realizing linear reciprocating motion can also be selected. This embodiment does not make specific limitations here.

[0069] In actual application of this embodiment, as Figure 3 shown as an example, the four moving plates 7 can simultaneously drive all the special-shaped sleeves 9 away from the mold body 2, eliminating the need for manual operation to move each special-shaped sleeve 9 away from the mold body 2 one by one, saving a large amount of time. The setting of the spring 13 ensures that when the special-shaped sleeve 9 moves away from the mold body 2, the square tube 10 will also move away from the mold body 2 synchronously until the square tube 10 abuts against the nut 11 and pushes the nut 11 to move, thereby tensioning the prestressed steel bar 3 from the relaxed state to the straightened state. At this time, when the moving plate 7 continues to push the special-shaped sleeve 9 to move, the square tube 10 will not be able to move, and the special-shaped sleeve 9 will compress the spring 13 and slide on the square tube 10, thereby triggering the two clamping blocks 12 to clamp the prestressed steel bar 3, thus improving the efficiency of connecting all the nuts 11 and the square tubes 10.

[0070] As Figures 6 - 7 shown, as a preferred embodiment of the present invention, a groove 1001 is formed on the square cylinder 10, and the spring 13 is fixedly connected to the bottom of the groove 1001.

[0071] In actual application of this embodiment, since the special-shaped sleeve 9 compresses the spring 13, the spring 13 is arranged in the groove 1001, so as to avoid the situation that when the two clamping blocks 12 do not clamp the prestressed steel bar 3, the special-shaped sleeve 9 may come into contact with the square cylinder 10, and at this time the spring 13 will be compressed into the groove 1001 by the special-shaped sleeve 9, thus avoiding being clamped and squeezed by the special-shaped sleeve 9 and the square cylinder 10 and causing damage to the spring 13, ensuring that the spring 13 can always be safely located between the special-shaped sleeve 9 and the square cylinder 10.

[0072] Please refer to Figures 1 - 17 shown, the present invention is a method for using a tensioning device of a track slab mold. The method is applied to a tensioning device of a track slab mold as described in the above embodiment. The method includes the following steps:

[0073] Step S1: The mold body 2 is transported to below the gantry 4 through the conveying track 1. At this time, a driving source drives the inner lifting frame 5 to descend, so that the bottom plate 8 descends to an appropriate height;

[0074] Step S2: All the prestressed steel bars 3 on the mold body 2 pass through the special-shaped sleeve 9 and the square cylinder 10 on the bottom plate 8, and the prestressed steel bars 3 are threadedly connected with the nuts 11. At this time, the nuts 11 abut against the square cylinder 10;

[0075] Step S3: The special-shaped sleeve 9 is connected through the connecting component. Subsequently, another driving source drives the outer lifting frame 6 to descend to an appropriate height, so that the tensioning component on the outer lifting frame 6 is connected to the connecting component;

[0076] Step S4: The tensioning component drives the special-shaped sleeve 9 away from the mold body 2 through the connecting component. The special-shaped sleeve 9 moves on the square cylinder 10, and the special-shaped sleeve 9 drives the two clamping blocks 12 to approach each other and clamp the prestressed steel bar 3 through the linkage component;

[0077] Step S5: At this time, when the special-shaped sleeve 9 continues to move, it will drive the prestressed steel bar 3 to be tensioned by clamping the prestressed steel bar 3 through the two clamping blocks 12. At the same time, the special-shaped sleeve 9 drives the square cylinder 10 to move synchronously, and the square cylinder 10 pushes the nut 11 to tension the prestressed steel bar 3.

[0078] The above has described a detailed description of an embodiment of the present invention, but the above content is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention application should still fall within the scope covered by the patent of the present invention.

Claims

1. A track plate mold tensioning device, characterized in that: include: A gantry (4) is fixedly mounted on the ground, and an inner lifting frame (5) and an outer lifting frame (6) are sleeved thereon, wherein the inner lifting frame (5) is located inside the outer lifting frame (6), the inner lifting frame (5) and the outer lifting frame (6) are respectively driven by two driving sources to be lifted and lowered, a first crossbeam (501) is fixedly mounted around the bottom end of the inner lifting frame (5), a plurality of base plates (8) arranged at equal intervals are arranged on the first crossbeam (501), and a second crossbeam (601) is fixedly mounted around the bottom end of the outer lifting frame (6), a plurality of tensioning components arranged at equal intervals are arranged on the second crossbeam (601); The special-shaped sleeve (9) is slidably mounted on the bottom plate (8), and a square cylinder (10) is slidably mounted on the end of the special-shaped sleeve (9) away from the mold body (2). The tensioning assembly drives the special-shaped sleeve (9) to move through the connecting assembly. Two clamping blocks (12) are slidably mounted in the square cylinder (10), and the axis thereof coincides with the axis of the special-shaped sleeve (9). The two clamping blocks (12) are driven by the linkage assembly to move toward each other. A conveying track (1) is fixedly installed on the ground and is used to convey the mold body (2) to the gantry (4). A plurality of prestressed steel bars (3) are arranged through the mold body (2). Both ends of the prestressed steel bars (3) are threadedly connected with nuts (11). The nuts (11) abut against a side of the square tube (10) away from the special-shaped sleeve (9), and the axis thereof coincides with the axis of the square tube (10). The two clamping blocks (12) are symmetrical about the prestressed steel bars (3). When the special-shaped sleeve (9) moves away from the mold body (2), it moves on the square cylinder (10), and (9) drives the two clamping blocks (12) to approach each other through the linkage assembly and clamp the prestressed steel bar (3). Then, the special-shaped sleeve (9) continues to move and clamps the prestressed steel bar (3) through the two clamping blocks (12) to drive the prestressed steel bar (3) to be tensioned. At the same time, the special-shaped sleeve (9) drives the square cylinder (10) to move synchronously, and the square cylinder (10) pushes the nut (11) to tension the prestressed steel bar (3). The linkage assembly comprises a round wheel (20), an inclined groove (21), a slider (22) and a slide groove (23); the inclined groove (21) is provided on the special-shaped sleeve (9), is arranged obliquely, and the distance between the end thereof close to the mold body (2) and the axis of the prestressed steel bar (3) is smaller than the distance between the end thereof far from the mold body (2) and the axis of the prestressed steel bar (3); the slide groove (23) is provided on the square cylinder (10) and is arranged vertically; the round wheel (20) is slidably mounted in the inclined groove (21), one end of which is fixedly connected to the clamping block (12), and the other end of which can be fixedly connected to the slider (22); the slider (22) is slidably mounted in the slide groove (23); The connection assembly comprises a connection block (14), a sub-joint (15), a trapezoidal block (16) and a trapezoidal groove (17); the trapezoidal groove (17) is provided at one end of the special-shaped sleeve (9) away from the mold body (2); the distance between the lower bottom of the trapezoidal groove (17) and the mold body (2) is smaller than the distance between the upper bottom of the trapezoidal groove (17) and the mold body (2); the trapezoidal block (16) is fixedly mounted on the connection block (14); the trapezoidal block (16) is slidably inserted into the trapezoidal groove (17); the sub-joint (15) is fixedly mounted on the connection block (14) and is connected to the tensioning assembly; when the connection block (14) is connected to the special-shaped sleeve (9), the axis of the sub-joint (15) coincides with the axis of the prestressed steel bar (3).

2. A track plate mold tensioning device according to claim 1, characterized in that: The connection assembly further comprises a clamping rod (18) and a clamping block (19); the clamping block (19) is fixedly mounted on the outer surface of the special-shaped sleeve (9); the clamping rod (18) is fixedly mounted on the connection block (14); when the trapezoidal block (16) on the connection block (14) is slidably inserted into the trapezoidal groove (17), the clamping rod (18) and the clamping block (19) are slidably clamped.

3. A track plate mold tensioning device according to claim 1, characterized in that: The nut (11) is threadedly connected to the square tube (10). When the two clamping blocks (12) clamp and fix the prestressed steel bar (3), the nut (11) is screwed into the square tube (10) and the nut (11) and the prestressed steel bar (3) are screwed into each other at the same time.

4. A track plate mold tensioning device according to claim 3, characterized in that: The four sides of the mold body (2) correspond to a movable plate (7), which is slidably mounted on the inner lifting frame (5) and is driven to move by an output source. The movable plate (7) abuts against one end of the special-shaped sleeve (9) facing the mold body (2), and one end of the square tube (10) located inside the special-shaped sleeve (9) is connected to the special-shaped sleeve (9) via a spring (13).

5. A track plate mold tensioning device according to claim 4, characterized in that: The square tube (10) is provided with a groove (1001), and the spring (13) is fixedly connected to the bottom of the groove (1001).

6. A method for using a track plate mold tensioning device, characterized in that: The method is applied to a track plate mold tensioning device as described in any one of claims 1 to 5, and the method comprises the following steps: Step S1: The mold body (2) is transported to the bottom of the gantry (4) via the transport track (1), and a driving source drives the inner lifting frame (5) to descend, so that the bottom plate (8) descends to a suitable height; Step S2: passing all the prestressed steel bars (3) on the mold body (2) through the special-shaped sleeves (9) and the square tube (10) on the bottom plate (8), and threading the prestressed steel bars (3) with the nuts (11), wherein the nuts (11) abut against the square tube (10); Step S3: connecting the special-shaped sleeve (9) through the connecting component, and then another driving source drives the outer lifting frame (6) to descend to a suitable height, so that the tensioning component on the outer lifting frame (6) is connected to the connecting component; Step S4: the tensioning component drives the special-shaped sleeve (9) away from the mold body (2) through the connecting component, the special-shaped sleeve (9) moves on the square cylinder (10), and the special-shaped sleeve (9) drives the two clamping blocks (12) to approach each other through the linkage component and clamp the prestressed steel bar (3); Step S5: At this time, the special-shaped sleeve (9) continues to move and clamps the prestressed steel bar (3) through the two clamping blocks (12) to drive the prestressed steel bar (3) to be tensioned. At the same time, the special-shaped sleeve (9) drives the square tube (10) to move synchronously, and the square tube (10) pushes the nut (11) to tension the prestressed steel bar (3).

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