Pre-tightening equipment for construction of main cable of cable bridge

Abstract

The invention provides pre-tightening equipment for construction of a main cable of a cable bridge, and relates to the technical field of bridge construction, the pre-tightening equipment comprises a first pre-tightening plate and a second pre-tightening plate, the first pre-tightening plate and the second pre-tightening plate are provided with a fastening mechanism facilitating pre-tightening of the main cable of the cable bridge, and the fastening mechanism comprises two L-shaped side plates and two triangular clamping blocks; the two L-shaped side plates are fixedly mounted at the side end parts of the first pre-tightening plate and the second pre-tightening plate respectively. According to the device, through cooperation of the interval clamping plates and the inner interlayer, the pre-tightening effect and the safety of the main cable are improved, the interval clamping plates transmit and adjust the pre-tightening force, the interval clamping plates are made of high-strength alloy steel, can bear large pre-tightening force and are not prone to deformation and damage, and the inner interlayer is made of a soft polyurethane material and can deform and be attached to the main cable according to the shape of the main cable; the friction force is provided and the surface of the main cable is protected, and stable and reliable friction force is provided in the pre-tightening process through the synergistic effect of the friction force and the main cable.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge construction, and more specifically, particularly relates to a pre-tightening device for the main cable construction of a suspension bridge. Background Art

[0002] When erecting a suspension bridge, the main cable of the suspension bridge is the main load-bearing structure. The shape of the main cable determines the basic alignment of the suspension bridge. The main cable is the key link connecting the bridge towers, anchorages, and the bridge deck. The alignment of the main cable of the suspension bridge is crucial for the structural performance and service function of the entire suspension bridge. Pre-tightening can cause the steel wires of the main cable to squeeze against each other, increasing the friction between the steel wires.

[0003] Chinese Patent Publication No.: CN109338888A, a pre-tightening cable device for a suspension bridge main cable and its usage method. In this invention, both ends of the stainless steel pull rod are fixedly connected to the support longitudinal beams on both sides of the main cable respectively. There are two circular handles, which are respectively connected to the stainless steel pull rod and fixed with bolts. The bottom of the traveling crane is provided with moving wheels, and limit blocks are provided at the positions of the moving wheels.

[0004] The existing pre-tightening of the suspension bridge main cable has the following disadvantages:

[0005] 1. The existing pre-tightening methods are usually designed for specific types or conventional specifications of suspension bridge main cables. Generally, after being fixed by hydraulic equipment and then fixed by the cooperation of nuts and screws, they are non-adjustable and lack versatility. Facing main cables with different diameters and various materials, it is difficult to flexibly adjust the pre-tightening method to achieve the best pre-tightening effect.

[0006] 2. Most of the existing pre-tightening operations focus on applying pre-tightening force and neglect the all-round protection of the main cable. The existing pre-tightening devices may lack buffer and wear-resistant designs during the pre-tightening process, easily scratch and wear the surface of the main cable, damage the anti-corrosion layer of the main cable, accelerate the aging of the main cable, and thus affect the long-term use of the main cable.

[0007] In view of this, research and improvement are carried out on the existing structure and deficiencies, and a pre-tightening device for the main cable construction of a suspension bridge is provided, with the expectation of achieving a more practical value. Summary of the Invention

[0008] In order to solve the above technical problems, the present invention provides a pre-tightening device for the main cable construction of a suspension bridge to solve the above problems.

[0009] A pre-tightening device for the main cable construction of a suspension bridge, comprising a first pre-tightening plate and a second pre-tightening plate. A fastening mechanism for facilitating the pre-tightening of the main cable of the suspension bridge is provided on the first pre-tightening plate and the second pre-tightening plate. The fastening mechanism includes two L-shaped side plates, two triangular clamping blocks, two spaced clamping plates and a mounting member. The two L-shaped side plates are respectively fixedly installed at the side ends of the first pre-tightening plate and the second pre-tightening plate, and the installation directions of the two L-shaped side plates are opposite. Arc-shaped plates are fixedly installed at the side ends of the two L-shaped side plates. The two triangular clamping blocks are respectively slidably installed on the inner side walls of the arc-shaped plates. The mounting member is fixedly installed at the lower end of the second pre-tightening plate. A fixing block is fixedly installed at the lower end of the first pre-tightening plate. A damping pad is fixedly installed on the inner side wall of the fixing block. Channel steels are fixedly installed at the side ends of the first pre-tightening plate and the second pre-tightening plate. At least two first limiting grooves are equidistantly penetrated and opened at the side ends of the first pre-tightening plate and the second pre-tightening plate. Thread grooves are penetrated and opened at the side ends of the two arc-shaped plates. Side positioning rods are fixedly installed at the side ends of the two L-shaped side plates. Arc-shaped baffles are fixedly installed at the side ends of the two side positioning rods. Thread grooves are penetrated and opened at the side ends of the two arc-shaped baffles. The two triangular clamping blocks are respectively slidably installed on the inner side walls of the two second limiting grooves. Threaded rods are rotatably installed at the side ends of the two triangular clamping blocks. The two threaded rods are respectively threadedly rotated and installed on the inner side walls of the thread grooves. Two telescopic rods are respectively fixedly installed between the two triangular clamping blocks and the arc-shaped baffles. The ends of the two triangular clamping blocks are both inclined cutting surfaces.

[0010] Preferably, a guide rod is fixedly installed at the side end of the mounting member, and the guide rod is slidably installed on the inner side wall of the damping pad.

[0011] Preferably, the two spaced clamping plates are respectively fixedly installed on the inner side walls of the first pre-tightening plate and the second pre-tightening plate, and inner interlayers are fixedly installed on the inner side walls of the two spaced clamping plates.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In the present invention, through the coordinated operation of the first pre-tightening plate, the second pre-tightening plate and the hydraulic equipment, the high-precision and high-strength pre-tightening clamping effect on the main cable of the suspension bridge is realized. During the pre-tightening construction operation of the main cable of the suspension bridge, the main cable is placed in the clamping interval constructed by the first pre-tightening plate and the second pre-tightening plate, and the hydraulic equipment is seamlessly docked on both sides. Relying on the stable and accurate driving force of the hydraulic system, the two are urged to approach each other, so as to realize the uniform and continuous pressure acting on the main cable, ensure that sufficient and effective extrusion is generated between the steel wires inside the main cable, significantly improve the friction force between the steel wires, and then promote the close connection of many steel wires to form a force-bearing structure with excellent integrity and bearing capacity.

[0014] In the present invention, by providing a spaced splint and an inner sandwich layer in cooperation, the pre-tightening effect and the safety of the main cable are improved. The spaced splint transmits and adjusts the pre-tightening force. Its material is high-strength alloy steel, which can withstand a large pre-tightening force and is not easily deformed or damaged. The inner sandwich layer is made of soft polyurethane material, which can deform according to the shape of the main cable, fit the main cable, provide frictional force and protect the surface of the main cable. The two work together to provide stable and reliable frictional force during the pre-tightening process, ensure the effective transmission of the pre-tightening force, and at the same time protect the surface of the main cable from scratches, abrasions and other damages, enhancing the overall performance.

[0015] In the present invention, by means of the cooperation of the arc-shaped plate, the triangular clamping block and the threaded groove, when the first pre-tightening plate and the second pre-tightening plate pre-tighten the main cable of the cable bridge, the pre-tightening force can be adjusted according to actual needs, ensuring that the pre-tightening force applied by the first pre-tightening plate and the second pre-tightening plate to the main cable of the cable bridge adapts to the requirements of the actual working conditions, and improving the adaptability of the device when gradually pre-tightening different cable bridges.

[0016] In the present invention, by providing the L-shaped side plate, the triangular clamping block, the first limiting groove and the second limiting groove in cooperation, the flexible adjustment and stable limiting of the pre-tightening stress are realized. After the first pre-tightening plate and the second pre-tightening plate on both sides apply appropriate pressure to pre-tighten the main cable, rotate the threaded rod to drive the triangular clamping block to slide and insert into the first limiting groove and the second limiting groove, which can limit the position of the pre-tightening plate. And the end inclined plane design of the triangular clamping block enables it to smoothly embed into the groove through the guiding and adapting characteristics of the inclined plane in the face of different working conditions, even if the first limiting groove and the second limiting groove are not completely coincident due to slight displacement deviation, realizing the multi-faceted adaptation of the pre-tightening stress.

[0017] In the present invention, by providing the fixed block, the damping pad and the guide rod in cooperation, the functions of guiding and auxiliary limiting are realized when the first pre-tightening plate and the second pre-tightening plate are installed. During the dynamic process of the first pre-tightening plate and the second pre-tightening plate approaching each other, the guide rod is inserted into the damping pad inside the fixed block, providing linear guidance for the movement of the pre-tightening plate, ensuring the consistency and stability of the relative movement trajectories of the two. At the same time, the damping pad relies on its damping characteristics to generate an appropriate and stable resistance to the movement of the guide rod. When the hydraulic equipment stops working instantaneously, this resistance can be converted into an auxiliary limiting force, cooperating with other limiting structures to jointly lock the positions of the first pre-tightening plate and the second pre-tightening plate. Description of the Drawings

[0018] Figure 1 is a schematic structural view of the first pre-tightening plate of the present invention;

[0019] Figure 2 is an exploded schematic structural view of the first pre-tightening plate of the present invention;

[0020] Figure 3 is a schematic structural view of the fixed block of the present invention;

[0021] Figure 4 It is a schematic top view structure of the first pre-tightening plate of the present invention;

[0022] Figure 5 It is a schematic cross-sectional view structure of the first pre-tightening plate of the present invention;

[0023] Figure 6 It is a schematic structure diagram of the second pre-tightening plate of the present invention;

[0024] Figure 7 It is an exploded schematic structure diagram of the L-shaped side plate of the present invention;

[0025] Figure 8 It is an exploded schematic structure diagram of the triangular clamping block of the present invention.

[0026] In the figure, the corresponding relationship between the component names and the drawing numbers is as follows: 1, the first pre-tightening plate; 11, the fixing block; 12, the damping pad; 13, the channel steel; 14, the first limiting groove; 2, the L-shaped side plate; 21, the arc plate; 22, the second limiting groove; 23, the side positioning rod; 24, the arc baffle; 25, the thread groove; 3, the triangular clamping block; 31, the telescopic rod; 32, the threaded rod; 4, the mounting member; 41, the guide rod; 5, the spacer clamp plate; 51, the inner sandwich layer; 6, the second pre-tightening plate. Specific Embodiments

[0027] The following further describes in detail the embodiments of the present invention in conjunction with the drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0028] Please refer to Figures 1 - 8, the present invention provides a pre-tightening device for the main cable construction of a cable bridge, including a first pre-tightening plate 1 and a second pre-tightening plate 6. The first pre-tightening plate 1 and the second pre-tightening plate 6 are provided with a fastening mechanism for facilitating the pre-tightening of the main cable of the cable bridge. The fastening mechanism includes two L-shaped side plates 2, two triangular clamping blocks 3, two spaced clamping plates 5 and a mounting member 4. The two L-shaped side plates 2 are respectively fixedly installed at the side ends of the first pre-tightening plate 1 and the second pre-tightening plate 6, and the installation directions of the two L-shaped side plates 2 are opposite. Arc-shaped plates 21 are fixedly installed at the side ends of the two L-shaped side plates 2. When the user pre-tightens the main cable of the cable bridge, the device can be assembled to pre-tighten the main cable of the cable bridge. When the device is assembled, the main cable of the cable bridge can be placed between the first pre-tightening plate 1 and the second pre-tightening plate 6. The two sides of the first pre-tightening plate 1 and the second pre-tightening plate 6 can be connected to a hydraulic device to assist in the assembly. During the process of pre-tightening the main cable of the cable bridge, the first pre-tightening plate 1 and the second pre-tightening plate 6 are driven by the hydraulic device to approach each other to pre-tighten and clamp the main cable of the cable bridge. When the first pre-tightening plate 1 and the second pre-tightening plate 6 approach each other, the first pre-tightening plate 1 will be inserted between the second pre-tightening plate 6 and the L-shaped side plate 2 on the second pre-tightening plate 6, and the second pre-tightening plate 6 will be inserted between the first pre-tightening plate 1 and the L-shaped side plate 2 on the first pre-tightening plate 1;

[0029] Two triangular clamping blocks 3 are respectively slidably installed on the inner side wall of the arc-shaped plate 21. The mounting member 4 is fixedly installed at the lower end of the second pre-tightening plate 6. The lower end of the first pre-tightening plate 1 is fixedly installed with a fixing block 11. A damping pad 12 is fixedly installed on the inner side wall of the fixing block 11. Channel steels 13 are fixedly installed at the side ends of the first pre-tightening plate 1 and the second pre-tightening plate 6. At least two first limiting grooves 14 are equidistantly penetrated and opened at the side ends of the first pre-tightening plate 1 and the second pre-tightening plate 6. Thread grooves 25 are penetrated and opened at the side ends of the two arc-shaped plates 21. Side positioning rods 23 are fixedly installed at the side ends of the two L-shaped side plates 2. Arc-shaped baffles 24 are fixedly installed at the side ends of the two side positioning rods 23. Thread grooves 25 are penetrated and opened at the side ends of the two arc-shaped baffles 24. Two triangular clamping blocks 3 are respectively slidably installed on the inner side walls of the two second limiting grooves 22. Threaded rods 32 are rotatably installed at the side ends of the two triangular clamping blocks 3. The two threaded rods 32 are respectively threadedly rotated and installed on the inner side walls of the thread grooves 25. Two telescopic rods 31 are fixedly installed between the two triangular clamping blocks 3 and the arc-shaped baffles 24 respectively. When the first pre-tightening plates 1 and the second pre-tightening plates 6 on both sides approach each other to clamp the main cable, when the first pre-tightening plates 1 and the second pre-tightening plates 6 on both sides apply appropriate pressure to pre-tighten the main cable, the driving of the first pre-tightening plates 1 and the second pre-tightening plates 6 by the hydraulic devices on both sides can be braked. The user can limit the positions of the first pre-tightening plates 1 and the L-shaped side plates 2. Taking one side of the second pre-tightening plate 6 as an example, the user can rotate the threaded rod 32 on one side of the second pre-tightening plate 6. The rotation of the threaded rod 32 in the thread groove 25 will drive the triangular clamping block 3 to slide towards one side of the second limiting groove 22 and the first limiting groove 14. After the triangular clamping block 3 slides and inserts into the second limiting groove 22 and the first limiting groove 14, the limiting of the second pre-tightening plate 6 and the first pre-tightening plate 1 is completed;

[0030] The ends of the two triangular clamping blocks 3 are both beveled surfaces. The end of the triangular clamping block 3 is a beveled surface. Even when the second pre-tightening plate 6 and the first pre-tightening plate 1 move, so that the second limiting groove 22 and the first limiting groove 14 are not completely in a coincident state, it can still limit the first pre-tightening plate 1 and the second pre-tightening plate 6 by inserting the triangular clamping block 3 into the second limiting groove 22 and the first limiting groove 14, making the adjustment of its pre-tightening stress variable and having high adaptability;

[0031] A guide rod 41 is fixedly installed at the side end of the mounting member 4. The guide rod 41 is slidably installed on the inner side wall of the damping pad 12. When the first pre-tightening plate 1 and the second pre-tightening plate 6 approach each other, the guide rod 41 on one side of the mounting member 4 will insert into the damping pad 12 in the fixing block 11. In this way, when the first pre-tightening plate 1 and the second pre-tightening plate 6 approach and move, it plays a certain guiding role. By setting the damping pad 12, a certain resistance is generated to the movement of the guide rod 41. When the hydraulic devices on both sides stop working, it assists in limiting the positions of the first pre-tightening plate 1 and the second pre-tightening plate 6;

[0032] Two spaced clamping plates 5 are respectively fixedly installed on the inner side walls of the first pre-tightening plate 1 and the second pre-tightening plate 6. Inner sandwich layers 51 are fixedly installed on the inner side walls of the two spaced clamping plates 5. When the first pre-tightening plate 1 and the second pre-tightening plate 6 on both sides move closer to each other, driving the two inner sandwich layers 51 on the inner side walls of the first pre-tightening plate 1 and the second pre-tightening plate 6 to contact and fasten with the circumferential ends of the main cable of the cable-stayed bridge, the pre-tightening of the main cable of the cable-stayed bridge is achieved. During the pre-tightening process when applying force, the first pre-tightening plate 1, the second pre-tightening plate 6, the spaced clamping plates 5 and the inner sandwich layers 51 cooperate to apply force. The materials of the first pre-tightening plate 1 and the second pre-tightening plate 6 are both hard structural steel, which can provide sufficient stiffness to resist the influence of external loads on clamping the main cable of the cable-stayed bridge. The materials of the two spaced clamping plates 5 are high-strength alloy steel, which can withstand and transmit large pre-tightening forces and are not prone to deformation or damage under the repeated action of the pre-tightening force. The materials of the two inner sandwich layers 51 are soft polyurethane materials. Polyurethane has good flexibility and wear resistance. It can deform to a certain extent according to the shape of the main cable to ensure the degree of fit with the main cable. At the same time, it can resist the wear generated during the installation and pre-tightening processes, protecting the integrity of the surface of the main cable. Furthermore, the two inner sandwich layers 51 provide good friction and protection for the main cable. The two spaced clamping plates 5 are used to transmit and adjust the pre-tightening force, and the first pre-tightening plate 1 and the second pre-tightening plate 6 enhance the stiffness and stability of the overall structure. Through the cooperative action of multiple layers of clamping plates, the pre-tightening effect and the safety of the main cable are improved.

[0033] Working principle:

[0034] First step, when erecting the cable-stayed bridge, the main cable of the cable-stayed bridge is the main load-bearing structure. The shape of the main cable determines the basic alignment of the cable-stayed bridge. The main cable is the key link connecting the bridge towers, anchorages and the bridge deck. The alignment of the main cable of the cable-stayed bridge is crucial for the structural performance and service function of the entire cable-stayed bridge. Pre-tightening can cause the steel wires in the main cable to be pressed against each other, increasing the friction between the steel wires. This friction can effectively connect the steel wires together to form an integral force-bearing structure.

[0035] Second step, when the user pre-tightens the main cable of the cable-stayed bridge, the cable-stayed bridge main cable can be pre-tightened by assembling this device. When assembling this device, the main cable of the cable-stayed bridge can be placed between the first pre-tightening plate 1 and the second pre-tightening plate 6. Both sides of the first pre-tightening plate 1 and the second pre-tightening plate 6 can be connected to hydraulic equipment to assist in the assembly. During the process of pre-tightening the main cable of the cable-stayed bridge, the first pre-tightening plate 1 and the second pre-tightening plate 6 are driven by the hydraulic equipment to move closer to each other to pre-tighten and clamp the main cable of the cable-stayed bridge. When the first pre-tightening plate 1 and the second pre-tightening plate 6 move closer to each other, the first pre-tightening plate 1 will insert between the second pre-tightening plate 6 and the L-shaped side plate 2 on the second pre-tightening plate 6, and the second pre-tightening plate 6 will insert between the first pre-tightening plate 1 and the L-shaped side plate 2 on the first pre-tightening plate 1, as shown in the attachment Figure 4 as shown;

[0036] This device realizes the high-precision and high-strength pre-tightening and clamping effect of the main cable of the cable bridge through the coordinated operation of the first pre-tightening plate 1, the second pre-tightening plate 6 and the hydraulic equipment. In the pre-tightening construction of the main cable of the cable bridge, the main cable is placed in the clamping interval constructed by the first pre-tightening plate 1 and the second pre-tightening plate 6, and the hydraulic equipment on both sides is seamlessly connected. With the stable and precise driving force of the hydraulic system, the two are urged to approach each other, so as to achieve uniform and continuous pressure on the main cable, ensure sufficient and effective extrusion between the steel wires inside the main cable, and significantly increase the friction between the steel wires, thereby urging many steel wires to be closely connected to form a force-bearing structure with excellent integrity and bearing capacity;

[0037] In the third step, when the first pre-tightening plate 1 and the second pre-tightening plate 6 on both sides are close to each other, the two inner interlayers 51 of the inner side walls of the first pre-tightening plate 1 and the second pre-tightening plate 6 are brought into contact and tightened with the circumferential ends of the cable bridge main cable, the pre-tightening of the cable bridge main cable is realized. When the pre-tightening process is applied, the first pre-tightening plate 1, the second pre-tightening plate 6, the spacing clamping plate 5 and the inner interlayer 51 cooperate to apply force. The materials of the first pre-tightening plate 1 and the second pre-tightening plate 6 are both hard structural steel, which can provide sufficient rigidity to resist the influence of external loads on the clamping of the cable bridge main cable. The material of the two spacing clamping plates 5 is high-strength alloy steel, which can withstand and transmit a large pre-tightening force, and It is not easy to be deformed or damaged under repeated action. The material of the two inner interlayers 51 is soft polyurethane material. Polyurethane has good flexibility and wear resistance. It can produce a certain degree of deformation according to the shape of the main cable to ensure the fit with the main cable. At the same time, it can resist the wear and tear generated during the installation and pre-tightening process, protect the integrity of the main cable surface, and then realize that the two inner interlayers 51 provide good friction and protection for the main cable. The two spacer clamps 5 are used to transmit and adjust the pre-tightening force. The first pre-tightening plate 1 and the second pre-tightening plate 6 enhance the rigidity and stability of the overall structure. Through the synergistic effect of the multi-layer clamps, the pre-tightening effect and the safety of the main cable are improved;

[0038] The device improves the pre-tightening effect and the safety of the main cable by cooperating with the spacer clamp 5 and the inner interlayer 51. The spacer clamp 5 transmits and adjusts the pre-tightening force. The material of the spacer clamp 5 is high-strength alloy steel, which can withstand a large pre-tightening force and is not easy to deform and damage. The inner interlayer 51 is made of soft polyurethane material, which can deform according to the shape of the main cable, fit the main cable, provide friction and protect the surface of the main cable. The two work together to provide stable and reliable friction during the pre-tightening process, ensure the effective transmission of the pre-tightening force, and protect the surface of the main cable from scratches, wear and other damage, thereby enhancing the overall performance.

[0039] Step 4, when the first pre-tightening plates 1 and the second pre-tightening plates 6 on both sides approach each other to clamp the main cable, when the first pre-tightening plates 1 and the second pre-tightening plates 6 on both sides apply appropriate pressure to pre-tighten the main cable, the driving of the first pre-tightening plates 1 and the second pre-tightening plates 6 by the hydraulic devices on both sides can be braked. The user can limit the positions of the first pre-tightening plates 1 and the L-shaped side plates 2. Taking one side of the second pre-tightening plate 6 as an example, the user can rotate the threaded rod 32 on one side of the second pre-tightening plate 6. When the threaded rod 32 rotates in the threaded groove 25, it will drive the triangular clamping block 3 to slide towards one side of the second limiting groove 22 and the first limiting groove 14. After the triangular clamping block 3 slides and inserts into the second limiting groove 22 and the first limiting groove 14, the limiting of the second pre-tightening plate 6 and the first pre-tightening plate 1 is completed. The user can use the same method to operate the triangular clamping block 3 on the first pre-tightening plate 1 on the other side, so that it also abuts against the second limiting groove 22 and the first limiting groove 14, so as to stably limit the positions of the pre-tightened first pre-tightening plate 1 and the second pre-tightening plate 6. Through the cooperation of a plurality of first limiting grooves 14 and second limiting grooves 22, the pre-tightening stress is adjustable, which can meet the different pre-tightening force requirements during actual pre-tightening. Moreover, the end of the triangular clamping block 3 is an inclined plane. Even when the second pre-tightening plate 6 and the first pre-tightening plate 1 move, so that the second limiting groove 22 and the first limiting groove 14 are not completely in a coincident state, it can still limit the first pre-tightening plate 1 and the second pre-tightening plate 6 by inserting the triangular clamping block 3 into the second limiting groove 22 and the first limiting groove 14, making the adjustment of the pre-tightening stress variable and the adaptability high;

[0040] By means of the cooperation of the arc-shaped plate 21, the triangular clamping block 3 and the threaded groove 25, the pre-tightening force of the first pre-tightening plate 1 and the second pre-tightening plate 6 can be adjusted according to actual needs when pre-tightening the main cable of the cable bridge, ensuring that the pre-tightening force applied by the first pre-tightening plate 1 and the second pre-tightening plate 6 to the main cable of the cable bridge meets the requirements of the actual working conditions, and improving the adaptability of the device when gradually pre-tightening different cable bridges;

[0041] Through the cooperation of the L-shaped side plate 2, the triangular clamping block 3, the first limiting groove 14 and the second limiting groove 22, the device realizes the flexible adjustment and stable limiting of the pre-tightening stress. After the first pre-tightening plates 1 and the second pre-tightening plates 6 on both sides apply appropriate pressure to pre-tighten the main cable, rotate the threaded rod 32 to drive the triangular clamping block 3 to slide and insert into the first limiting groove 14 and the second limiting groove 22, and the position of the pre-tightening plate can be limited. Moreover, due to the inclined plane design of the end of the triangular clamping block 3, in the face of different working conditions, even if the first limiting groove 14 and the second limiting groove 22 are not completely coincident due to slight displacement deviation, the triangular clamping block 3 can smoothly embed into the groove through the guiding and adapting characteristics of the inclined plane, realizing the diversified adaptation of the pre-tightening stress;

[0042] Fifth step, when the first pre-tightening plate 1 and the second pre-tightening plate 6 approach each other, the guide rod 41 on one side of the mounting member 4 will insert into the damping pad 12 in the fixing block 11, so as to play a certain guiding role when the first pre-tightening plate 1 and the second pre-tightening plate 6 approach and move. By setting the damping pad 12, a certain resistance is generated to the movement of the guide rod 41, and when the hydraulic devices on both sides stop working, it assists in limiting the positions of the first pre-tightening plate 1 and the second pre-tightening plate 6.

[0043] Through the cooperation of the fixing block 11, the damping pad 12 and the guide rod 41, this device realizes the functions of guiding and auxiliary limiting during the installation of the first pre-tightening plate 1 and the second pre-tightening plate 6. During the dynamic process of the first pre-tightening plate 1 and the second pre-tightening plate 6 approaching each other, the guide rod 41 inserts into the damping pad 12 inside the fixing block 11, providing linear guidance for the movement of the pre-tightening plate to ensure the consistency and stability of the relative movement trajectories of the two. At the same time, relying on its damping characteristics, the damping pad 12 generates a moderate and stable resistance to the movement of the guide rod 41. When the hydraulic device stops working instantaneously, this resistance can be converted into an auxiliary limiting force, which, together with other limiting structures, jointly locks the positions of the first pre-tightening plate 1 and the second pre-tightening plate 6.

[0044] The embodiments of the present invention are given for purposes of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better explain the principles of the invention and its practical applications, and to enable those of ordinary skill in the art to understand the invention so as to design various embodiments with various modifications suitable for specific purposes.

Claims

1. A pre-tensioning device for main cable construction of a cable bridge, comprising a first pre-tensioning plate (1) and a second pre-tensioning plate (6), characterized in that: The first pre-tightening plate (1) and the second pre-tightening plate (6) are provided with a fastening mechanism for pre-tightening the main cable of the cable bridge; The fastening mechanism comprises two L-shaped side plates (2), two triangular clamping blocks (3), two spacer clamping plates (5) and a mounting member (4); the two L-shaped side plates (2) are respectively fixedly mounted on the side ends of the first pre-tightening plate (1) and the second pre-tightening plate (6); the mounting directions of the two L-shaped side plates (2) are opposite; the side ends of the two L-shaped side plates (2) are both fixedly mounted with an arc plate (21); the two triangular clamping blocks (3) are respectively slidably mounted on the inner side walls of the arc plate (21); and the mounting member (4) is fixedly mounted on the lower end of the second pre-tightening plate (6).

2. A pre-tensioning device for main cable construction of a cable bridge as claimed in claim 1, characterized in that: A fixing block (11) is fixedly mounted on the lower end of the first preload plate (1), and a damping pad (12) is fixedly mounted on the inner side wall of the fixing block (11).

3. A pre-tensioning device for main cable construction of a cable bridge as claimed in claim 2, characterized in that: Channel steels (13) are fixedly mounted on the side ends of the first pre-tightening plate (1) and the second pre-tightening plate (6).

4. A pre-tensioning device for main cable construction of a cable bridge as claimed in claim 3, characterized in that: At least two first limiting grooves (14) are equidistantly provided through the side ends of the first pre-tightening plate (1) and the second pre-tightening plate (6).

5. A pre-tensioning device for main cable construction of a cable bridge as claimed in claim 4, characterized in that: The side ends of the two arc-shaped plates (21) are penetrated by thread grooves (25), the side ends of the two L-shaped side plates (2) are fixedly mounted with side positioning rods (23), and the side ends of the two side positioning rods (23) are fixedly mounted with arc-shaped baffles (24).

6. A pre-tensioning device for main cable construction of a cable bridge as claimed in claim 5, characterized in that: The side ends of the two arc-shaped baffles (24) are both penetrated by a threaded groove (25), and the two triangular clamping blocks (3) are respectively slidably mounted on the inner side walls of the two second limiting grooves (22).

7. A pre-tensioning device for main cable construction of a cable bridge as claimed in claim 6, characterized in that: The side ends of the two triangular clamping blocks (3) are both rotatably mounted with threaded rods (32), and the two threaded rods (32) are respectively threadably mounted on the inner side walls of the thread groove (25).

8. A pre-tensioning device for main cable construction of a cable bridge as claimed in claim 7, characterized in that: Two telescopic rods (31) are respectively fixedly installed between the two triangular clamping blocks (3) and the arc-shaped baffle (24), and the ends of the two triangular clamping blocks (3) are both beveled surfaces.

9. A pre-tensioning device for main cable construction of a cable bridge as claimed in claim 8, characterized in that: A guide rod (41) is fixedly mounted on the side end of the mounting member (4), and the guide rod (41) is slidably mounted on the inner side wall of the damping pad (12).

10. A pre-tensioning device for main cable construction of a cable bridge as claimed in claim 9, characterized in that: The two spacing clamps (5) are respectively fixedly mounted on the inner side walls of the first pre-tightening plate (1) and the second pre-tightening plate (6), and the inner side walls of the two spacing clamps (5) are both fixedly mounted with inner interlayers (51).

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