Track plate mold tensioning device and using method thereof

Abstract

The invention relates to the technical field of prestressed reinforcement tensioning devices, and discloses a track plate mold tensioning device and a using method thereof.The track plate mold tensioning device comprises a conveying track used for conveying a mold body to pass through a portal frame fixedly installed on the ground, and a plurality of prestressed reinforcements are arranged in the mold body in a penetrating mode; the special-shaped sleeve slides on the square cylinder, the linkage assembly enables the two clamping blocks to move on the square cylinder so as to clamp the prestressed reinforcement, and the pulling force borne by the special-shaped sleeve can directly act on the nut through the square cylinder which cannot move; the prestressed steel bar is directly pulled through the nut, so that the prestressed steel bar can be clamped more and more tightly by the two clamping blocks when receiving huge pulling force, the opposite movement of the two clamping blocks ensures that the axis of the prestressed steel bar is always stable, and the problem that the tensioning efficiency is reduced due to axis swinging caused by huge pulling force is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of prestressed steel bar tensioning devices, and in particular to a track slab mould tensioning device and a use method thereof. Background Art

[0002] The track slab mold tensioning device is a key equipment 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. This device usually includes a transverse tensioning unit and a longitudinal tensioning unit, which can tension track slabs of different specifications, thereby improving production efficiency and reducing costs.

[0003] However, each prestressed steel bar has slight differences in elastic modulus, initial length, etc., and when the two ends are tensioned synchronously, the magnitude of the tension output at the two ends will also be slightly different. These situations cause the tension shared by the two ends of the prestressed steel bars to not be exactly the same during the tensioning process. Because of the uneven force, the steel bars will swing. From a microscopic perspective, the axis of the prestressed steel bar no longer maintains a fixed straight line state, but deviates from the ideal straight line trajectory and swings left and right or up and down. As a result of this phenomenon, the transmission of tension is dispersed, and the tensioning efficiency is reduced. What is more serious is that the stability of the tensioning process will also be affected. Based on this, the present invention purposely provides a track plate mold tensioning device and a method of using the same, which can avoid the swing 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 track plate mold tensioning device and a use method thereof to solve the technical problems in the prior art in view of the deficiencies in the prior art.

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

[0006] A track plate mold tensioning device, comprising:

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

[0008] The special-shaped sleeve is slidably mounted on the bottom plate, and a square tube is slidably mounted on the end away from the mold body. The tensioning assembly drives the special-shaped sleeve to move through the connecting assembly. Two clamping blocks are slidably mounted in the square tube, and the axis thereof coincides with the axis of the special-shaped sleeve. The two clamping blocks are driven by the linkage assembly to move toward each other.

[0009] A conveying track is fixedly installed on the ground and used to convey the mold body to the gantry. A plurality of prestressed steel bars are arranged throughout the mold body. Both ends of the prestressed steel bars are threadedly connected with nuts. The nuts abut against a side of the square tube away from the special-shaped sleeve, and the axis thereof coincides with the axis of the square tube. The two clamping blocks are symmetrical about the prestressed steel bars.

[0010] When the special-shaped sleeve moves away from the mold body, it moves on the square cylinder, and drives the two clamps to approach each other through the linkage assembly and clamp the prestressed steel bars. Then the special-shaped sleeve continues to move and clamps the prestressed steel bars through the two clamps to drive the prestressed steel bars to be tensioned. At the same time, the special-shaped sleeve drives the square cylinder to move synchronously, and the square cylinder pushes the nut to tension the prestressed steel bars.

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

[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 smaller than the distance between the upper bottom of the trapezoidal groove and the mold body, the trapezoidal block is fixedly installed on the connecting block, the trapezoidal block is slidably inserted in the trapezoidal groove, the sub-joint is fixedly installed on the connecting block, and it 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 also 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 and the clamping block are slidably clamped.

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

[0015] As a further solution of the present invention: the four sides of the mold body correspond to a movable plate, the movable plate is slidably installed on the inner lifting frame, it is driven to move by the output source, and it abuts against one end of the special-shaped sleeve facing the mold body, and the end of the square tube located in 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 track slab mold tensioning device, the method is applied to a track slab mold tensioning device as described above, the method comprising the following steps:

[0018] Step S1: The mold body is transported to the bottom of the gantry through the conveying track, and a driving source drives the inner lifting frame to descend so that the bottom plate descends to a suitable height;

[0019] Step S2: Pass all the prestressed steel bars on the mold body through the special-shaped sleeves and the square tube on the bottom plate, and thread the prestressed steel bars with the nuts, at which time the nuts abut against the square tube;

[0020] Step S3: Connect the special-shaped sleeve through the connecting assembly, and then another driving source drives the outer lifting frame to descend to a suitable height, so that the tensioning assembly on the outer lifting frame is connected to the connecting assembly;

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

[0022] Step S5: At this time, the special-shaped sleeve continues to move and clamps the prestressed steel bars through two clamping blocks to drive the prestressed steel bars to be tensioned. 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 bars.

[0023] Beneficial effects of the present invention:

[0024] 1. In the present invention, the prestressed steel bar is passed 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 and ensures that the prestressed steel bar is in a straight state. Then, the tensioning assembly is connected to the square tube through the connecting assembly, and the 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 to clamp the prestressed steel bar, and the clamping force on the prestressed steel bar is proportional to the magnitude of the tensile force applied to the special-shaped sleeve, and the clamping block is clamped on the prestressed steel bar and cannot move, which is directly manifested as the special-shaped sleeve cannot move on the square tube. The tensile force applied to the special-shaped sleeve will also directly act on the nut through the square tube, and the prestressed steel bar is directly pulled through the nut, so that the prestressed steel bar can be clamped tighter and tighter by the two clamping blocks when subjected to the huge tensile force, and the relative movement of the two clamping blocks ensures that the axis of the prestressed steel bar is always stable, avoiding the problem of the axis swinging due to the huge tensile force, which leads to the reduction of tensioning efficiency;

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

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

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

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

[0029] Figure 2 It is a schematic diagram of the structure of the external lifting frame after it is lowered in the present invention;

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

[0031] Figure 4 The present invention Figure 3 The enlarged structural diagram of part A in the middle;

[0032] Figure 5 It is a structural schematic diagram of the prestressed steel bar passing 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] Fig. 9 It is a schematic diagram of the structure of the nut abutting against the square tube in the present invention;

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

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

[0039] Fig.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] Fig.13 It is a structural schematic diagram of the threaded connection between the nut and the square tube in the present invention;

[0041] Fig.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] Fig.15 The present invention Fig.14 A schematic diagram of the structure in cross-section;

[0043] Fig.16 It is a schematic diagram of the structure of the special-shaped sleeve and the square cylinder being separated in the present invention;

[0044] Fig.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 following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0047] See also Figure 1-Figure 17 As shown, the present invention is a track plate mold tensioning device, comprising:

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

[0049] The special-shaped sleeve 9 is slidably mounted on the bottom plate 8, and a square tube 10 is slidably mounted on the end 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 tube 10, and its axis 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;

[0050] 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 its axis coincides with the axis of the square tube 10. The two clamping blocks 12 are symmetrical about the prestressed steel bars 3.

[0051] 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 and clamp the prestressed steel bar 3 through the linkage assembly. 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.

[0052] In one case of the present embodiment, an anchor is provided at the place where the prestressed steel bar 3 passes 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 an electric cylinder, an electric telescopic rod and other components, and other mechanisms that can realize lifting and lowering movements can also be selected. This embodiment does not make specific limitations here; the tensioning assembly includes a hydraulic jack, a guide system, a displacement sensor, a tension meter, etc. It should be noted that the above-mentioned components are all prior art, and the present invention does not improve them. Therefore, there is no need to disclose their specific mechanical structure and circuit structure, which does not affect the integrity of the present invention.

[0053] The working principle of the present invention is as follows: the mold body 2 is transported to the bottom of the gantry 4 through the conveying track 1, and then a driving source drives the inner lifting frame 5 to descend, so that the bottom plate 8 is lowered to a suitable height. Figure 5 As shown in the example, the prestressed steel bar 3 can be passed through the special-shaped sleeve 9 and the square tube 10, and the Figure 6 It can be seen that the two clamping blocks 12 are away from the prestressed steel bar 3. Fig. 9 As shown in the figure, the nut 11 is threadedly connected to the prestressed steel bar 3. At this time, the nut 11 will abut on the square tube 10. If the special-shaped sleeve 9 is pulled 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 is away from the mold body 2, it will inevitably drive the square tube 10 away from the mold body 2, and the nut 11 abuts on the square tube 10 and is threadedly connected to the prestressed steel bar 3, so the tension can be applied to the prestressed steel bar 3. At this time, the tension on the prestressed steel bar 3 can be regarded as In a common embodiment of the threaded connection method, the square tube 10 is slidably installed in the special-shaped sleeve 9. When the prestressed steel bar 3 is in a straight state, that is, the nuts 11 at both ends of the prestressed steel bar 3 do not change their positions 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 for the special-shaped sleeve 9 to move toward the square tube 10. At this time, the square tube 10 does not move, and when the special-shaped sleeve 9 moves, the two clamping blocks 12 are driven to approach each other through the linkage assembly, thereby clamping the prestressed steel bar 3. The above process is as follows Figure 10-11 As shown in the figure, when the prestressed steel bar 3 blocks the two clamping blocks 12 from continuing to approach, and the clamping block 12 slides on the square tube 10, conversely, after the clamping block 12 stops moving, it can directly drive the square tube 10 and the special-shaped sleeve 9 to move synchronously, and the clamping block 12 will also move synchronously with the square tube 10. At this time, the prestressed steel bar 3 is not only subjected to the tension force of the movement of the nut 11, but also the movement of the clamping block 12 after clamping the prestressed steel bar 3 will also cause tension to the prestressed steel bar 3, and the clamping force of the prestressed steel bar 3 by the clamping block 12 is proportional to the tension force on 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, and then the outer lifting frame 6 is driven down to a suitable height by another driving source, 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, and the prestressed steel bar 3 is fixed to the mold body 2 by the anchor, that is, the tensioning of the prestressed steel bar 3 is completed.

[0055] like Figure 5-Figure 17 As 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 slide groove 23. The inclined groove 21 is opened on the special-shaped sleeve 9, which is arranged obliquely, and the distance between the end close to the mold body 2 and the axis of the prestressed steel bar 3 is smaller than the distance between the end away from the mold body 2 and the axis of the prestressed steel bar 3. The slide groove 23 is opened on the square tube 10 and is arranged vertically. 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 can be fixedly connected to the slider 22, and the slider 22 is slidably installed in the slide groove 23.

[0056] In practical application, if Fig.16 As shown, the clamping block 12 is slidably mounted on the square tube 10 through the slider 22. Fig.17 As shown, the clamping block 12 and the sliding block 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 arranged obliquely. When the position of the square tube 10 is fixed and the special-shaped sleeve 9 is subjected to a pulling force in the direction away from the mold body 2, the round wheels 20 of the upper and lower clamping blocks 12 will be forced to slide in the inclined groove 21, and the sliding trend is to approach each other, and the two round wheels 20 approaching each other will cause the sliding block 22 to slide close to each other in the sliding groove 23, that is, the two clamping blocks 12 can clamp the prestressed steel bar 3, and when the special-shaped sleeve 9 is subjected to the huge pulling force of the tensioning assembly, the clamping blocks 12 can clamp the prestressed steel bar 3 tighter and tighter, ensuring that sufficient clamping force is generated.

[0057] like Figure 5-Figure 17 As 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 away from the mold body 2, and 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 installed on the connecting block 14, and the trapezoidal block 16 is slidably inserted in 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] The bottom plate 8 is provided with a slideway 801 , and the special-shaped sleeve 9 is fixedly provided with a side wing 901 , and the side wing 901 is slidably installed in the slideway 801 .

[0059] In one case of this embodiment, the tensioning assembly also includes a female plug that cooperates with the sub-connector 15, and the female plug is fixedly installed on the movable end of the hydraulic jack. When the sub-connector 15 is inserted into the female plug, the two will be tightly connected and can withstand extremely large loads.

[0060] In practical application, if Fig.17 As shown, align the trapezoidal block 16 on the connecting block 14 with the trapezoidal groove 17, and insert 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. Then the tension component is connected to the sub-joint 15, and the sub-joint 15 is pulled. 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, so as to ensure that the transmission path of the output force of the tension component is straight and stable, which can minimize the dispersion and loss of force, ensure that all the tensioning force effectively acts on the prestressed steel bar 3, and improve the tensioning efficiency. 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] Furthermore, the longitudinal limiting effect of the slideway 801 on the side wing 901 can resist the force of pulling the connecting block 14 out of the special-shaped sleeve 9, thereby facilitating the separation of the connecting block 14 from the special-shaped sleeve 9.

[0062] like Figure 14-17 As shown, as a preferred embodiment of the present invention, the connecting assembly also includes 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, and the clamping rod 18 is fixedly mounted 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] In practical application, if Fig.14 As shown in the example, when the clamping rod 18 and the clamping block 19 are slidably engaged, when the tensioning assembly pulls the connecting block 14 to move, the clamping points 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, thereby improving the stability of the connection between the connecting block 14 and the special-shaped sleeve 9.

[0064] like Figure 4-Figure 17 As shown, as a preferred embodiment of the present invention, the nut 11 is threadedly connected to the square tube 10. When the two clamps 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 in at the same time.

[0065] In actual application of this embodiment, since the square tube 10 and the nut 11 are only in abutment connection, when the square tube 10 abuts on the nut 11, the nut 11 will be offset, resulting in the misalignment of the axis of the nut 11 and the axis of the prestressed steel bar 3 and the problem of unstable tensioning. However, the design of the threaded connection between the nut 11 and the square tube 10 can ensure that the axis of the nut 11 and the axis of the prestressed steel bar 3 always coincide with each other, thereby ensuring that the axis of the prestressed steel bar 3 is always a horizontal line, which is conducive to the action of the tensioning component force;

[0066] At this time, the steps of installing the nut 11 need to be changed, such as Figure 5 As shown, at this time, the prestressed steel bar 3 passes through the special-shaped sleeve 9 and the square tube 10, and then Fig. 9 As shown in the figure, the nut 11 is partially threadedly connected with the prestressed steel bar 3 and then abutted against the square tube 10. The details are as follows Fig.10 As shown, then Fig.11 As shown, the special-shaped sleeve 9 is manually moved close to the square tube 10, so that the clamping block 12 clamps and fixes the prestressed steel bar 3. Fig.12 As shown, the nut 11 can be manually rotated into the square tube 10 while the nut 11 and the prestressed steel bar 3 are completely threadedly connected.

[0067] like Figure 3-Figure 17 As shown, as a preferred embodiment of the present invention, the four sides of the mold body 2 correspond to a movable plate 7, and the movable plate 7 is slidably installed on the inner lifting frame 5. It 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. The end of the square tube 10 located in 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 may be an electric cylinder, an electric telescopic rod, or other components, or other mechanisms capable of achieving linear reciprocating motion, which is not specifically limited in this embodiment.

[0069] In practical application, if Figure 3 As shown in the example, four movable plates 7 can simultaneously drive all the special-shaped sleeves 9 away from the mold body 2, and there is no need to manually move the special-shaped sleeves 9 away from the mold body 2 one by one, which saves a lot 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 cylinder 10 will also move away from the mold body 2 synchronously until the square cylinder 10 abuts against the nut 11 and pushes the nut 11 to move, thereby the tensioned prestressed steel bar 3 is changed from a relaxed state to a stretched state. At this time, when the movable plate 7 continues to push the special-shaped sleeve 9 to move, the square cylinder 10 will not be able to move, and the special-shaped sleeve 9 will compress the spring 13, thereby sliding on the square cylinder 10, and then triggering the two clamps 12 to clamp the prestressed steel bar 3, thereby improving the efficiency of connecting all the nuts 11 and the square cylinder 10.

[0070] like Figure 6-Figure 7 As shown, as a preferred embodiment of the present invention, a groove 1001 is opened on the square tube 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 will compress the spring 13, the spring 13 is arranged in the groove 1001. In this way, when the two clamping blocks 12 do not clamp the prestressed steel bar 3, the special-shaped sleeve 9 may abut against the square cylinder 10. At this time, the spring 13 will be compressed into the groove 1001 by the special-shaped sleeve 9, thereby avoiding the situation where the spring 13 is clamped and squeezed by the special-shaped sleeve 9 and the square cylinder 10, causing damage to the spring 13, and ensuring that the spring 13 can always be safely located between the special-shaped sleeve 9 and the square cylinder 10.

[0072] See also Figure 1-Figure 17 As shown, the present invention is a method for using a track plate mold tensioning device, the method is applied to a track plate mold tensioning device as described in the above embodiment, and the method comprises the following steps:

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

[0074] Step S2: Pass 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 thread the prestressed steel bars 3 with the nuts 11, at which time the nuts 11 abut against the square tube 10;

[0075] Step S3: Connect the special-shaped sleeve 9 through the connecting assembly, and then another driving source drives the outer lifting frame 6 to descend to a suitable height, so that the tensioning assembly on the outer lifting frame 6 is connected to the connecting assembly;

[0076] Step S4: the tensioning assembly drives the special-shaped sleeve 9 away from the mold body 2 through the connecting assembly, 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 assembly and clamp the prestressed steel bar 3;

[0077] 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.

[0078] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A track plate mold tensioning device, characterized in that: include: A gantry (4) is fixedly installed on the ground, and an inner lifting frame (5) and an outer lifting frame (6) are sleeved thereon, and the inner lifting frame (5) is located inside the outer lifting frame (6), and 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 installed around the bottom end of the inner lifting frame (5), and a plurality of base plates (8) arranged at equal intervals are arranged on the first crossbeam (501), and a second crossbeam (601) is fixedly installed around the bottom end of the outer lifting frame (6), and 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 tube (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 tube (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 tube (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 tube (10) to move synchronously, and the square tube (10) pushes the nut (11) to tension the prestressed steel bar (3).

2. A track plate mold tensioning device according to claim 1, characterized in that: 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 tube (10) and is arranged vertically. 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 slide groove (23).

3. A track plate mold tensioning device according to claim 1, characterized in that: 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).

4. A track plate mold tensioning device according to claim 3, characterized in that: The connecting 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 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.

5. 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 at the same time, the nut (11) and the prestressed steel bar (3) are screwed into each other.

6. A track plate mold tensioning device according to claim 5, 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, and is in contact with one end of the special-shaped sleeve (9) facing the mold body (2), and one end of the square tube (10) located in the special-shaped sleeve (9) is connected to the special-shaped sleeve (9) through a spring (13).

7. A track plate mold tensioning device according to claim 6, 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).

8. 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 7, 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: Pass all the prestressed steel bars (3) on the mold body (2) through the special-shaped sleeve (9) and the square tube (10) on the bottom plate (8), and thread the prestressed steel bars (3) with the nut (11), at which time the nut (11) abuts against the square tube (10); Step S3: connecting the special-shaped sleeve (9) through the connecting assembly, and then another driving source drives the outer lifting frame (6) to descend to a suitable height, so that the tensioning assembly on the outer lifting frame (6) is connected to the connecting assembly; Step S4: the tensioning assembly drives the special-shaped sleeve (9) away from the mold body (2) through the connecting assembly, the special-shaped sleeve (9) moves on the square tube (10), and the special-shaped sleeve (9) drives the two clamping blocks (12) to approach each other through the linkage assembly 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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