Prestress tensioning equipment for highway continuous rigid frame bridge

Abstract

The utility model relates to prestressed tension technology field, and disclose a kind of prestressed tension equipment for highway continuous rigid frame bridge, including steel strand, the outside of steel strand is clamped with limit block one and limit block two, the inside of limit block two is provided with clamping groove. The utility model is provided with clamping groove in the inside of limit block two, and connecting block is fixedly installed on the outside of limit block one, the steel strand of different position is clamped into the inside of positioning groove by limit block one and limit block two respectively, limit block one and limit block two are pasted at this time, clamping groove and connecting block are connected at this time by staggering, limit block one and limit block two are fixed, and stud is engaged with limit block one and limit block two respectively, so that limit block one and limit block two are fixed, and the steel strand is sleeved in specified position, reach the effect of subsequent installation conveniently.

Description

Technical Field

[0001] This utility model relates to the field of prestressing tensioning technology, and more specifically, to a prestressing tensioning device for a continuous rigid frame bridge for highways. Background Technology

[0002] A prestressing tensioning device is a device used to apply prestress to bridge structures. By applying tension to the prestressing tendons in advance, the structure can better resist tensile stress when subjected to external loads, thereby improving the structure's load-bearing capacity, crack resistance, and durability. However, during the installation of existing bridge structures, steel strands need to be inserted inside the bridge structure to support the internal structure. At the same time, the steel strands are left at both ends of the bridge structure to apply prestress tension. However, the steel strands left outside are prone to bursting. If they are not aligned and limited, it is difficult to carry out subsequent perforation operations. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a prestressed tensioning device for continuous rigid frame bridges of highways, which has the advantages of limiting the steel strands and facilitating installation.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a prestressed tensioning device for a continuous rigid frame bridge on a highway, comprising a steel strand, wherein a first limiting block and a second limiting block are engaged on the outer side of the steel strand, the second limiting block has a groove inside, a connecting block is fixedly installed on the outer side of the first limiting block, the connecting block is engaged inside the groove, both the first and second limiting blocks have positioning grooves inside, and studs are engaged inside the first and second limiting blocks, the positioning grooves are engaged with the steel strand.

[0005] As a preferred embodiment of this utility model, an anchor plate is sleeved on the outer side of the steel strand, and an anchor clamp is snapped into the inside of the anchor plate. The anchor clamp is sleeved on the outer side of the steel strand and is located on the left side of the limiting block. A limiting plate and a fixing plate are provided on the left side of the anchor plate, and a limiting sleeve is snapped into the inside of both the limiting plate and the fixing plate.

[0006] As a preferred embodiment of this utility model, a hydraulic jack is provided on the outside of the steel strand, the hydraulic jack is located on the left side of the limiting sleeve, and an inner shaft assembly is slidably connected inside the hydraulic jack, through which the steel strand passes.

[0007] As a preferred embodiment of this utility model, a docking plate is fixedly installed on the upper part of the inner shaft assembly, a fixing plate is provided on the left side of the inner shaft assembly, a motor is fixedly installed inside the fixing plate, a lead screw is fixedly installed at the output end of the motor, and the lead screw meshes with the docking plate.

[0008] As a preferred embodiment of this utility model, the hydraulic jack has a groove inside, a slider is slidably connected inside the groove, a scale is fixedly installed on the right side of the slider, and the starting point of the fixed plate is flush with the docking plate.

[0009] As a preferred technical solution of this utility model, the hydraulic jack is fixedly installed with a coupling interface on its outer side. There are two coupling interfaces, and the two coupling interfaces are respectively connected to an external hydraulic device. There are multiple steel strands, and each of the multiple steel strands is formed by winding multiple strands.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. This utility model features a slot inside the limiting block 2 and a connecting block fixedly installed on the outside of the limiting block 1, with the connecting block engaging inside the slot. Both limiting blocks 1 and 2 have positioning slots inside, and studs engage inside them. When prestressing the steel strand is required, the steel strands at different positions are first inserted into the positioning slots using limiting blocks 1 and 2 respectively. Then, the limiting blocks 1 and 2 are brought together, and the slots and connecting blocks engage through misalignment, fixing the limiting blocks 1 and 2. Simultaneously, the studs engage with the limiting blocks 1 and 2 respectively, thus limiting and fixing them, and securing the steel strands in the designated position for convenient subsequent installation.

[0012] 2. This utility model features a fixed plate on the left side of the inner shaft assembly, with a motor fixedly installed inside the fixed plate. A lead screw is fixedly installed at the output end of the motor, and the lead screw meshes with the connecting plate. When the inner shaft assembly prestresses the steel strand through hydraulic action, the motor is started to drive the lead screw to rotate, causing the lead screw to mesh with the connecting plate. This results in the inner shaft assembly being subjected to a certain force pulling to the left during displacement, reducing the force applied to the steel strand by the hydraulic jack. Consequently, the service life of the hydraulic jack is increased, damage is reduced, and the accuracy of the hydraulic jack is maintained. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This utility model Figure 1 Enlarged schematic diagram of the structure at point A;

[0015] Figure 3 This is a schematic diagram of the hydraulic jack structure of this utility model;

[0016] Figure 4 This utility model Figure 3 Enlarged schematic diagram of the structure at point B;

[0017] Figure 5 This is a schematic diagram of the steel strand structure of this utility model.

[0018] In the diagram: 1. Steel strand; 2. Limiting block one; 3. Limiting block two; 4. Slot; 5. Connecting block; 6. Positioning slot; 7. Stud; 8. Anchor plate; 9. Anchor clamp; 10. Limiting plate; 11. Fixing disc; 12. Limiting sleeve; 13. Hydraulic jack; 14. Inner shaft assembly; 15. Connecting plate; 16. Fixing plate; 17. Motor; 18. Lead screw; 19. Slide groove; 20. Sliding block; 21. Scale; 22. Connecting interface. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figures 1 to 5 As shown, this utility model provides a prestressed tensioning device for a continuous rigid frame bridge on a highway, including a steel strand 1. A limiting block 2 and a limiting block 3 are engaged on the outer side of the steel strand 1. A groove 4 is provided inside the limiting block 3. A connecting block 5 is fixedly installed on the outer side of the limiting block 2 and is engaged inside the groove 4. A positioning groove 6 is provided inside both the limiting block 2 and the limiting block 3. A stud 7 is engaged inside the limiting block 2 and the limiting block 3. The positioning groove 6 is engaged with the steel strand 1.

[0021] When prestressing is required on the steel strand 1, firstly, limit block 1 2 and limit block 2 3 are used to insert the steel strand 1 at different positions into the positioning groove 6. Then, limit block 1 2 and limit block 2 3 are fitted together. At this time, the slot 4 and the connecting block 5 are engaged by misalignment, so that limit block 1 2 and limit block 2 3 are fixed. At the same time, the stud 7 is engaged with limit block 1 2 and limit block 2 3 respectively, so that limit block 1 2 and limit block 2 3 are limited and fixed, so that the steel strand 1 is sleeved in the designated position, which facilitates subsequent installation.

[0022] An anchor plate 8 is sleeved on the outside of the steel strand 1. An anchor clamp 9 is snapped into the inside of the anchor plate 8. The anchor clamp 9 is sleeved on the outside of the steel strand 1. The anchor clamp 9 is located on the left side of the limiting block 2. A limiting plate 10 and a fixing plate 11 are provided on the left side of the anchor plate 8. A limiting sleeve 12 is snapped into the inside of both the limiting plate 10 and the fixing plate 11.

[0023] The main function of the anchor clamp 9 is to lock the steel strand 1 on the outside of the anchor plate 8 by sleeve on the outside of the anchor clamp 9, thereby limiting the steel strand 1. When the steel strand 1 is pulled to the left, the outside of the steel strand 1 is squeezed, and there will be no reset.

[0024] Among them, a hydraulic jack 13 is provided on the outside of the steel strand 1. The hydraulic jack 13 is located on the left side of the limiting sleeve 12. An inner shaft assembly 14 is slidably connected inside the hydraulic jack 13, and the steel strand 1 passes through the inside of the inner shaft assembly 14.

[0025] When it is necessary to prestress the steel strand 1, the steel strand 1 is first fixed, the hydraulic jack 13 is connected to the external hydraulic device, and after starting, the inner shaft assembly 14 is moved to the left, so that the steel strand 1 is pulled to the left, thereby achieving the effect of prestress tensioning.

[0026] Among them, a docking plate 15 is fixedly installed on the upper part of the inner shaft assembly 14, a fixing plate 16 is provided on the left side of the inner shaft assembly 14, a motor 17 is fixedly installed inside the fixing plate 16, and a lead screw 18 is fixedly installed at the output end of the motor 17, and the lead screw 18 meshes with the docking plate 15.

[0027] When the inner shaft assembly 14 applies prestress to the steel strand 1 through hydraulic action, the starting motor 17 drives the lead screw 18 to rotate, causing the lead screw 18 to mesh with the docking plate 15. This causes the inner shaft assembly 14 to be subjected to a certain pulling force to the left when it is displaced, thus reducing the force applied to the steel strand 1 by the hydraulic jack 13. This increases the service life of the hydraulic jack 13, reduces damage, and maintains the accuracy of the hydraulic jack 13.

[0028] The hydraulic jack 13 has a groove 19 inside, and a slider 20 is slidably connected inside the groove 19. A scale 21 is fixedly installed on the right side of the slider 20, and the starting point of the fixed plate 11 is flush with the docking plate 15.

[0029] When the inner shaft assembly 14 moves inside the hydraulic jack 13 to apply tension to the steel strand 1, it will drive the steel strand 1 to move. The distance moved can be observed through the scale 21, allowing for the calculation of the corresponding stress, determining whether the tension is sufficient, and improving overall accuracy.

[0030] Among them, the hydraulic jack 13 has a fixed interface 22 on its outer side. There are two interfaces 22, which are connected to the external hydraulic device respectively. There are multiple steel strands 1, and each steel strand 1 is formed by winding multiple strands.

[0031] Multiple steel strands 1 are threaded through the interior of the bridge, which increases the compressive strength of the bridge interior and improves the overall performance.

[0032] Working principle and usage process of this utility model:

[0033] Firstly, a slot 4 is provided inside the second limiting block 3, and a connecting block 5 is fixedly installed on the outside of the first limiting block 2, with the connecting block 5 engaging inside the slot 4. Simultaneously, positioning slots 6 are provided inside both the first limiting block 2 and the second limiting block 3, and studs 7 are engaged inside the first limiting block 2 and the second limiting block 3. When prestressing of the steel strand 1 is required, the first limiting block 2 and the second limiting block 3 are used to insert the steel strand 1 at different positions into the positioning slots 6. Then, the first limiting block 2 and the second limiting block 3 are brought together. The slot 4 and the connecting block 5 are engaged through misalignment, thus fixing the first limiting block 2 and the second limiting block 3. Simultaneously, the studs 7 are engaged with the first limiting block 2 and the second limiting block 3, thereby limiting and fixing the first limiting block 2 and the second limiting block 3, and ensuring the steel strand 1 is fitted into the designated position for convenient subsequent installation.

[0034] At the same time, the anchor clamp 9, the limiting plate 10, the fixing plate 11 and the limiting sleeve 12 are respectively put into the outside of the steel strand 1 in the corresponding order, and the steel strand 1 is passed through the inside of the hydraulic jack 13. The anchor clamp 9 limits the position of the steel strand 1. After the hydraulic jack 13 is started, the inner shaft assembly 14 is moved to the left, and the steel strand 1 is pulled to the left, thereby achieving the effect of prestressing tension.

[0035] Finally, a fixing plate 16 is provided on the left side of the inner shaft assembly 14. A motor 17 is fixedly installed inside the fixing plate 16, and a lead screw 18 is fixedly installed at the output end of the motor 17. The lead screw 18 meshes with the docking plate 15. When the inner shaft assembly 14 performs prestress tensioning on the steel strand 1 through hydraulic action, the motor 17 is started to drive the lead screw 18 to rotate, so that the lead screw 18 meshes with the docking plate 15. When the inner shaft assembly 14 is displaced, it is subjected to a certain force pulling to the left, so that the force applied by the hydraulic jack 13 to the steel strand 1 is less, thereby increasing the service life of the hydraulic jack 13, reducing damage, and maintaining the accuracy of the hydraulic jack 13.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prestressed tensioning device for a continuous rigid frame bridge on a highway, comprising steel strands (1), characterized in that: The outer side of the steel strand (1) is engaged with a first limiting block (2) and a second limiting block (3). The second limiting block (3) has a slot (4) inside. A connecting block (5) is fixedly installed on the outer side of the first limiting block (2). The connecting block (5) is engaged in the slot (4). The first limiting block (2) and the second limiting block (3) are both provided with positioning slots (6). Studs (7) are engaged in the interior of the first limiting block (2) and the second limiting block (3). The positioning slots (6) are engaged with the steel strand (1).

2. The prestressing tensioning device for a continuous rigid frame bridge on a highway according to claim 1, characterized in that: An anchor plate (8) is sleeved on the outside of the steel strand (1). An anchor clamp (9) is snapped into the inside of the anchor plate (8). The anchor clamp (9) is sleeved on the outside of the steel strand (1). The anchor clamp (9) is located on the left side of the limiting block (2). A limiting plate (10) and a fixing plate (11) are provided on the left side of the anchor plate (8). A limiting sleeve (12) is snapped into the inside of both the limiting plate (10) and the fixing plate (11).

3. A prestressing tensioning device for a continuous rigid frame bridge on a highway according to claim 2, characterized in that: A hydraulic jack (13) is provided on the outside of the steel strand (1). The hydraulic jack (13) is located on the left side of the limiting sleeve (12). An inner shaft assembly (14) is slidably connected inside the hydraulic jack (13). The steel strand (1) passes through the inside of the inner shaft assembly (14).

4. A prestressing tensioning device for a continuous rigid frame bridge on a highway according to claim 3, characterized in that: A docking plate (15) is fixedly installed on the top of the inner shaft assembly (14). A fixing plate (16) is provided on the left side of the inner shaft assembly (14). A motor (17) is fixedly installed inside the fixing plate (16). A lead screw (18) is fixedly installed at the output end of the motor (17). The lead screw (18) meshes with the docking plate (15).

5. A prestressing tensioning device for a continuous rigid frame bridge on a highway according to claim 4, characterized in that: The hydraulic jack (13) has a groove (19) inside, and a slider (20) is slidably connected inside the groove (19). A scale (21) is fixedly installed on the right side of the slider (20), and the starting point of the fixed plate (11) is flush with the docking plate (15).

6. A prestressing tensioning device for a continuous rigid frame bridge on a highway according to claim 5, characterized in that: The hydraulic jack (13) has a fixed interface (22) installed on its outer side. There are two interfaces (22), which are connected to external hydraulic devices respectively. There are multiple steel strands (1), and each steel strand (1) is formed by winding multiple strands.

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