Bridge prestress tensioning device

Abstract

The utility model discloses a bridge prestress tensioning device which comprises a transversely-arranged telescopic rod, a fixing plate is fixedly connected to the telescopic rod in a sleeved mode, a spring gasket, a tensioning spring, a limiting disc and a nut are connected to the telescopic rod in a sleeved mode, and the spring gasket and the limiting disc are located at the left end and the right end of the tensioning spring respectively. The side, away from the tension spring, of the spring gasket is fixed to the fixing plate, the limiting disc is slidably connected with the telescopic rod, a transversely-formed guide groove is formed in the upper side wall of the telescopic rod, and a guide block is slidably connected to the inner side wall of the guide groove. The upper end of the guide block penetrates through the guide groove and is fixedly connected with the inner side wall of the limiting disc, the nut is in threaded connection with the telescopic rod, and the nut is located on the side, away from the tension spring, of the limiting disc. The bridge prestress tensioning device is improved and optimized, effective fixing of the spring is achieved, the locking and anti-disengaging functions are achieved, and therefore reliability is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of bridge technology, and in particular to a bridge prestressing tensioning device. Background Technology

[0002] A bridge generally refers to a structure erected over rivers, lakes, or seas to allow vehicles and pedestrians to pass smoothly. To adapt to the modern, rapidly developing transportation industry, the term "bridge" has also been extended to refer to structures erected to cross mountain streams, adverse geological conditions, or meet other transportation needs, making travel more convenient. A bridge generally consists of a superstructure, substructure, supports, and ancillary structures. The superstructure, also known as the bridge span structure, is the main structure that crosses obstacles. The substructure includes abutments, piers, and foundations. Supports are force-transmitting devices installed at the support points of the bridge span structure and the piers or abutments. Ancillary structures refer to bridge approach slabs, tapered slopes, revetments, and diversion works, etc.

[0003] The existing utility model patent with application number CN201720926072.8 proposes a bridge prestressing tensioning device, including a protective cover, a telescopic rod fixing block, a rod sleeve, a telescopic rod, a tension spring, threads, spring washers, a fixing plate, and positioning holes. The positioning holes are evenly distributed on the surface of the fixing plate, and the fixing plate is connected through the two ends of the telescopic rod... This enables the bridge prestressing tensioning device to adjust the rod length for different sizes of bridges by incorporating a telescopic rod, thereby improving the practicality of the device.

[0004] Despite the numerous advantages shown in the comparative document, its reliance on only two fixing blocks to ensure the stability and anti-detachment of the tension spring poses a safety risk that the fixing blocks may loosen or fall off. Therefore, its reliability still needs further improvement and optimization. Utility Model Content

[0005] The purpose of this utility model is to solve the problems mentioned in the background art and to propose a bridge prestressing tensioning device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A bridge prestressing tensioning device includes a transversely arranged telescopic rod, a fixed plate fixedly sleeved on the telescopic rod, and a spring washer, a tension spring, a limiting plate, and a nut respectively sleeved on the telescopic rod. The spring washer and the limiting plate are located at the left and right ends of the tension spring, respectively. The side of the spring washer away from the tension spring is fixed to the fixed plate. The limiting plate is slidably connected to the telescopic rod. The upper side wall of the telescopic rod has a transversely arranged guide groove. A guide block is slidably connected to the inner side wall of the guide groove. The upper end of the guide block passes through the guide groove and is fixedly connected to the inner side wall of the limiting plate. The nut is threadedly connected to the telescopic rod. The nut is located on the side of the limiting plate away from the tension spring. A sliding groove is provided inside the nut and near the top. The inner side wall of the sliding groove slides... A slider is connected to the sliding block. A horizontally arranged locking rod is fixedly connected to the side of the slider facing the limiting plate. The limiting plate has multiple grooves in a ring shape corresponding to the locking rod on the side facing the nut. The nut has a through hole corresponding to the locking rod on the side facing the limiting plate. One end of the locking rod slides into the through hole. A horizontally arranged lead screw is slidably inserted into the slider. Both ends of the lead screw pass through the slider and are rotatably connected to the inner wall of the slide groove. A worm gear is fixedly sleeved at the end of the lead screw away from the locking rod. A worm gear meshing with the worm gear is vertically rotatably connected to the inner bottom of the slide groove. An opening is provided at the inner top of the slide groove. A knob is rotatably embedded on the inner wall of the opening. The upper end of the worm gear extends into the opening and is fixedly connected to the lower end of the knob. The upper end of the knob has an internal hexagonal groove.

[0008] Preferably, a first fixing ring is fixedly sleeved on the telescopic rod, and one side of the first fixing ring is fixedly connected to the side of the fixing plate away from the tension spring.

[0009] Preferably, a second fixing ring is fixedly sleeved on the lever, and one side of the second fixing ring is fixedly connected to the outer wall of the slider.

[0010] Preferably, a horizontally arranged guide rod is slidably inserted into the slider, and both ends of the guide rod pass through the slider and are fixedly connected to the inner sidewall of the groove.

[0011] Preferably, a support block is rotatably sleeved on the worm gear, and one end of the support block is fixedly connected to the inner sidewall of the slide groove.

[0012] Preferably, the lower end of the guide block is provided with an arc-shaped groove, and a ball bearing is rotatably connected to the inner sidewall of the arc-shaped groove, with part of the ball bearing penetrating through the arc-shaped groove.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model utilizes the design of a nut and a limiting plate to effectively fix the tension spring and prevent it from falling off. Simultaneously, through the ingenious combination of a knob, worm gear, worm wheel, lead screw, slider, locking rod, and locking groove, the nut is prevented from loosening, avoiding the problem of spring falling off due to nut loosening and significantly improving overall reliability.

[0015] 2. The internal hexagonal groove design in this utility model makes it easy for users to rotate the knob, while the support block effectively supports the worm gear and enhances its stability during rotation. In addition, the guide block and guide groove are set as a limiting plate to provide a moving guide function, prevent it from rotating, and further ensure the reliability of the structure.

[0016] 3. This utility model improves and optimizes the prestressed tensioning device for bridges, which not only effectively fixes the springs but also provides a locking and anti-detachment function, thereby significantly improving reliability. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of a bridge prestressing tensioning device proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the nut in a bridge prestressing tensioning device proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the structure at point A of a bridge prestressing tensioning device proposed in this utility model;

[0020] Figure 4 This is a partial side sectional view of the telescopic rod structure of a bridge prestressing tensioning device proposed in this utility model.

[0021] In the diagram: 1-Telescopic rod, 2-Fixing plate, 3-First fixing ring, 4-Spring washer, 5-Tension spring, 6-Limiting plate, 7-Nut, 8-Guide block, 9-Clamping rod, 10-Slider, 11-Lead screw, 12-Worm gear, 13-Worm, 14-Knob, 15-Support block, 16-Guide rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-4A bridge prestressing tensioning device includes a transversely arranged telescopic rod 1, a fixed plate 2 for installing spring washers 4, and a first fixed ring 3 for improving the firmness between the fixed plate 2 and the telescopic rod 1. One side of the first fixed ring 3 is fixedly connected to the side of the fixed plate 2 away from the tension spring 5. Spring washers 4, tension spring 5, limiting discs 6 and nuts 7 are respectively fitted on the telescopic rod 1. The telescopic rod 1, fixed plate 2, spring washers 4 and tension spring 5 have been disclosed in prior art and will not be described again here. The limiting discs 6 and nut 7 are used to prevent the tension spring 5 from loosening.

[0024] In this embodiment, the spring washer 4 and the limiting plate 6 are located at the left and right ends of the tension spring 5, respectively. The side of the spring washer 4 away from the tension spring 5 is fixed to the fixing plate 2. The limiting plate 6 and the telescopic rod 1 are slidably connected. The upper side wall of the telescopic rod 1 is provided with a horizontally arranged guide groove. A guide block 8 is slidably connected to the inner side wall of the guide groove to guide the movement of the limiting plate 6. The upper end of the guide block 8 passes through the guide groove and is fixedly connected to the inner side wall of the limiting plate 6. The lower end of the guide block 8 is provided with an arc-shaped groove. A ball is rolled on the inner side wall of the arc-shaped groove to reduce the resistance when the guide block 8 moves. The ball part passes through the arc-shaped groove.

[0025] In this embodiment, the nut 7 and the telescopic rod 1 are connected by a thread. The nut 7 is located on the side of the limiting plate 6 away from the tension spring 5. A sliding groove is provided inside the nut 7 and near the top. A slider 10 is slidably connected to the inner wall of the sliding groove to drive the locking rod 9 to move. A horizontally arranged guide rod 16 is slidably inserted inside the slider 10 to guide the slider 10 to move. The two ends of the guide rod 16 pass through the slider 10 and are fixedly connected to the inner wall of the sliding groove.

[0026] In this embodiment, a horizontally arranged locking rod 9 is fixedly connected to the side of the slider 10 facing the limiting disk 6, which is used to cooperate with the locking nut 7. The limiting disk 6 has a plurality of locking grooves corresponding to the locking rod 9 arranged in a ring on the side facing the nut 7. The nut 7 has a through hole corresponding to the locking rod 9 on the side facing the limiting disk 6. One end of the locking rod 9 slides into the through hole. A second fixing ring is fixedly sleeved on the locking rod 9 to improve the firmness between the locking rod 9 and the slider 10. One side of the second fixing ring is fixedly connected to the outer wall of the slider 10.

[0027] In this embodiment, a horizontally arranged lead screw 11 is slidably inserted into the slider 10 to drive the slider 10 to move. The lead screw 11 and the slider 10 are connected by a thread. Both ends of the lead screw 11 pass through the slider 10 and are rotatably connected to the inner sidewall of the slide groove. A worm gear 12 is fixedly sleeved at the end of the lead screw 11 away from the locking rod 9 to drive the lead screw 11 to rotate. A worm 13 that meshes with the worm gear 12 is vertically rotatably connected to the bottom of the slide groove to drive the worm gear 12 to rotate. The helix angle of the worm 13 is smaller than that of the worm gear 12. The friction angle of the worm 13 serves as a self-locking and anti-loosening mechanism. A support block 15 is rotatably sleeved on the worm 13 to support it. One end of the support block 15 is fixedly connected to the inner wall of the slide groove. The top of the slide groove has an opening, and a knob 14 is rotatably embedded in the inner wall of the opening to drive the worm 13 to rotate. The upper end of the worm 13 extends into the opening and is fixedly connected to the lower end of the knob 14. The upper end of the knob 14 has an internal hexagonal groove to facilitate the user to rotate the knob 14 using an internal hexagonal wrench.

[0028] In this embodiment, firstly, a wrench is used to rotate and tighten the nut 7. The nut 7 moves on the telescopic rod 1 by means of the thread engagement principle until it is in close contact with the limiting plate 6. During this process, the nut 7 applies a pushing force and pressure to the limiting plate 6, pushing it to move and resist the tension spring 5, effectively preventing the spring from loosening. At the same time, the movement of the limiting plate 6 drives the guide block 8 to slide smoothly in the guide groove, ensuring the direction of movement of the limiting plate 6 and preventing it from rotating. Next, an Allen wrench is inserted into the Allen groove to rotate the knob 14. The rotation of the knob 14 drives the worm gear 13 to rotate. The meshing action of the worm gear 13 and the worm wheel 12 further drives the lead screw 11 to rotate. The lead screw 11, through thread engagement, pushes the slider 10 to move towards the limiting plate 6. The movement of the slider 10 drives the locking rod 9 to pass through the through hole and insert into the locking groove, thereby locking the rotation capability of the nut 7 and preventing it from loosening or falling off, further improving the overall reliability.

[0029] As described above, the telescopic rod, fixing plate, spring washer and tension spring have been disclosed in the prior art or are existing mature technologies. Their working principle and internal structure are known to those skilled in the art. This application only utilizes their function and does not improve their internal structure. Therefore, they will not be described in detail.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bridge prestressing tensioning device, comprising a transversely arranged telescopic rod (1), characterized in that: A fixing plate (2) is fixedly sleeved on the telescopic rod (1). A spring washer (4), a tension spring (5), a limiting plate (6), and a nut (7) are respectively sleeved on the telescopic rod (1). The spring washer (4) and the limiting plate (6) are located at the left and right ends of the tension spring (5), respectively. The side of the spring washer (4) away from the tension spring (5) is fixed to the fixing plate (2). The limiting plate (6) is slidably connected to the telescopic rod (1). The upper side wall of the telescopic rod (1) A guide groove is provided horizontally, and a guide block (8) is slidably connected to the inner wall of the guide groove. The upper end of the guide block (8) passes through the guide groove and is fixedly connected to the inner wall of the limiting plate (6). The nut (7) is threadedly connected to the telescopic rod (1). The nut (7) is located on the side of the limiting plate (6) away from the tension spring (5). A sliding groove is provided inside the nut (7) and near the top. A slider (10) is slidably connected to the inner wall of the sliding groove. A horizontally arranged locking rod (9) is fixedly connected to the side facing the limiting plate (6). The limiting plate (6) has multiple grooves in a ring shape corresponding to the locking rod (9) on the side facing the nut (7). The nut (7) has a through hole corresponding to the locking rod (9) on the side facing the limiting plate (6). One end of the locking rod (9) slides into the through hole. A horizontally arranged lead screw (11) is slidably inserted into the slider (10). Both ends of the lead screw (11) pass through the slider (10). 10) and rotates to the inner wall of the slide. The end of the lead screw (11) away from the clamp (9) is fixedly sleeved with a worm gear (12). The bottom of the slide is vertically rotated to be connected to a worm (13) that meshes with the worm gear (12). The top of the slide is provided with an opening. A knob (14) is rotatably embedded on the inner wall of the opening. The upper end of the worm (13) extends into the opening and is fixedly connected to the lower end of the knob (14). The upper end of the knob (14) is provided with an internal hexagonal groove.

2. The bridge prestressing tensioning device according to claim 1, characterized in that: A first fixing ring (3) is fixedly sleeved on the telescopic rod (1), and one side of the first fixing ring (3) is fixedly connected to the side of the fixing plate (2) away from the tension spring (5).

3. A bridge prestressing tensioning device according to claim 1, characterized in that: A second fixing ring is fixedly sleeved on the lever (9), and one side of the second fixing ring is fixedly connected to the outer wall of the slider (10).

4. A bridge prestressing tensioning device according to claim 1, characterized in that: A horizontally arranged guide rod (16) is slidably inserted inside the slider (10). The two ends of the guide rod (16) pass through the slider (10) and are fixedly connected to the inner sidewall of the groove.

5. A bridge prestressing tensioning device according to claim 1, characterized in that: A support block (15) is rotatably sleeved on the worm (13), and one end of the support block (15) is fixedly connected to the inner sidewall of the slide groove.

6. A bridge prestressing tensioning device according to claim 1, characterized in that: The lower end of the guide block (8) is provided with an arc-shaped groove, and a ball is rolled on the inner side wall of the arc-shaped groove, with part of the ball passing through the arc-shaped groove.

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