Bridge hogging moment convenient and fast integrated tensioning device

Abstract

The utility model discloses a bridge hogging moment convenient integrated tensioning device which comprises a moving trolley, a support, a suspender, a cross rod and a jack, the support is of a vertically-arranged square frame structure, a vertically-arranged guide assembly is arranged outside the support, and the suspender is vertically arranged in the guide assembly in a penetrating mode so that the suspender can move in the vertical direction of the support; a lifting mechanism is arranged on the support, the cross rod is fixed to the bottom of the lifting rod, one end of the cross rod extends outwards to form a lifting part, the other end of the cross rod is used for containing a jack, and the jack moves along the cross rod. A fixing frame is arranged at the end, away from the support, of the moving trolley, and the tensioning equipment main machine is arranged in the fixing frame. According to the tensioning device, the square frame structure is adopted for guiding the guide rod, meanwhile, the lifting point is moved to the transverse rod from the top, the tensioning equipment main machine serves as a balance weight at the tail end of the trolley, and therefore the problem that the stability of the trolley is poor due to the fact that the lifting point is located at the top of the lifting rod and the triangular support inclines forwards is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to a convenient integrated tensioning device for bridge negative bending moment. Background Technology

[0002] Negative moment tensioning is a key technology in the construction of prestressed concrete bridges. It is mainly used to counteract the negative bending moment generated by the bridge structure under load, thereby preventing concrete cracking and improving the load-bearing capacity and durability of the structure.

[0003] Chinese patent CN 215104743 U discloses a bridge negative bending moment tensioning device and an operating platform lifting device. The front end of the trolley platform is constructed using welded steel pipes to form a triangular support. A pulley is installed at the top of the triangular support, and a hoisting rod is lowered from the top of the hoisting rod via a winch. With this structure, the triangular support needs to be tilted forward at a certain angle to avoid interference between the hoisting rod and the trolley, resulting in relatively poor overall structural stability.

[0004] Therefore, a bridge negative bending moment tensioning device with good stability is needed. Utility Model Content

[0005] To address the aforementioned issues, this utility model provides a convenient integrated tensioning device for bridge negative bending moment. It adopts a square frame structure, which avoids the stability problems caused by the forward tilting of existing triangular supports. At the same time, by using the main tensioning equipment as a counterweight, the overall structural stability can be effectively improved.

[0006] Specifically, this utility model is implemented as follows:

[0007] A convenient integrated tensioning device for negative bending moment of a bridge includes: a mobile trolley, a support, a hanger, a crossbar, and a jack. The support is a vertically arranged square frame structure, and a vertically arranged guide component is provided on the outside of the support. The hanger is vertically inserted into the guide component so that the hanger can move along the vertical direction of the support.

[0008] The support is equipped with a lifting mechanism. The crossbar is fixed to the bottom of the lifting rod, and one end of the crossbar extends outward to form a lifting part, while the other end is used to place the jack. The jack is configured to move along the crossbar.

[0009] The mobile trolley is equipped with a fixed frame at the end away from the support, and the main unit of the tensioning device is set inside the fixed frame.

[0010] Furthermore, the guide assembly includes at least one guide sleeve, and the boom passes through the guide sleeve.

[0011] Furthermore, two guide sleeves are provided and distributed at the upper and lower ends of the bracket, and a guide ring is provided between the two guide sleeves.

[0012] Furthermore, the guide sleeve is provided with a plurality of balls arranged along the inner circumference of the guide sleeve.

[0013] Furthermore, a slide rail is provided on the crossbar, and the jack is slidably connected to the slide rail.

[0014] Furthermore, the jack is mounted on a rotating seat, which is rotatably connected to a sliding seat, and the sliding seat is slidably connected to the slide rail.

[0015] Furthermore, a pulley is provided at the bottom of the sliding seat.

[0016] Furthermore, a locking element is provided on the rotating base, which is used to lock the rotating base to lock the jack.

[0017] Furthermore, the lifting mechanism is a manual hoist, and a lifting ring is provided on the lifting part, with the manual hoist connected to the lifting ring.

[0018] Furthermore, the end of the mobile trolley away from the support is provided with a support leg.

[0019] The working principle of this utility model:

[0020] In operation, the mobile trolley is moved to the edge of the bridge, and then the boom, crossbar, and jacks are lowered using a manual hoist so that the jacks are located under the bridge. The boom and crossbar are then manually rotated so that the crossbar faces inward. The jacks are then moved so that they align with the prestressed steel strands of the bridge. After the jacks are aligned with the prestressed steel strands by rotating them, they are connected to the prestressed steel strands. The jacks apply the design tension to the steel strands, thereby achieving negative bending moment tensioning of the bridge.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] (1) The bridge negative bending moment convenient integrated tensioning device provided by this utility model adopts a square frame structure to guide the guide rod, and moves the lifting point from the top to the crossbar. The end of the trolley uses the main unit of the tensioning equipment as a counterweight, thereby effectively solving the problem of poor trolley stability caused by the lifting point being located at the top of the suspender rod and the triangular bracket tilting forward.

[0023] (2) The position and direction of the jack can be adjusted according to the actual situation, which effectively improves the applicability of the tensioning device. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the bridge negative bending moment convenient integrated tensioning device in Example 1;

[0025] Figure 2 This is a schematic diagram of the structure of the jack and crossbar in Example 1;

[0026] Figure 3 This is a cross-sectional view of the guide sleeve portion in Example 1;

[0027] Figure 4 This is a schematic diagram of the movement of the jack in Example 1;

[0028] Figure 5 This is a schematic diagram of the jack's rotation in Example 1;

[0029] Figure 6 This is a schematic diagram showing the usage status of the bridge negative bending moment convenient integrated tensioning device in Example 1.

[0030] Figure label:

[0031] 1-Mobile trolley; 11-Fixed frame; 12-Outrigger; 2-Bracket; 3-Hanging rod; 4-Horizontal bar; 41-Slide rail; 42-Lifting part; 43-Lifting ring; 5-Jack; 51-Pulley; 52-Sliding seat; 53-Rotating seat; 54-Locking bolt; 6-Tensioning equipment main unit; 71-Guide sleeve; 72-Guide ring; 73-Ball bearing; 8-Manual hoist; 9-Bridge. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] like Figure 1-2 As shown, this embodiment provides a convenient integrated tensioning device for bridge negative bending moment, including: a mobile trolley 11, a support 2, a suspender 3, a crossbar 4, and a jack 5. The mobile trolley 11 is welded from steel pipes and has wheels at the bottom. One end is the support 2, which is supported by diagonal braces. The other end of the mobile trolley 11 is a push handle end, which is equipped with a fixed frame 11 for placing the tensioning equipment host 6 and a support leg 12 for supporting the mobile trolley 1. The tensioning equipment host 6 acts as a counterweight, increasing the weight at the end of the tensioning device to improve the overall stability.

[0035] The crossbar 4 is fixed to the bottom of the lifting rod 3, with one end extending outward to form a lifting section 42 and the other end being a slide rail 41. The jack 5 is slidably connected to the slide rail 41 via a sliding seat 52. A manual hoist 8 is installed on the bracket 2. The lifting end of the manual hoist 8 extends to the lifting section 42 of the crossbar 4 and is connected to it via a lifting ring 43, so that the crossbar 4 can be raised and lowered by the manual hoist 8 to realize the hoisting and lowering of the jack 5 and the adjustment of its height.

[0036] The support 2 is a vertically arranged square frame structure. A vertically arranged guide assembly is set on the outside of the support. The guide assembly consists of two guide sleeves 71 and a guide ring 72 in the middle. The guide sleeves 71 and the lifting rod 3 are in movable fit. Since the lifting point is located at the bottom, there is a problem of sliding friction between the lifting rod 3 and the guide sleeves 71 during the lifting process. In order to improve the smoothness of lifting, several balls 73 are arranged along the inner circumference of the guide sleeves 71. The balls 73 convert the sliding friction into rolling friction, thereby improving the smoothness of lifting.

[0037] like Figure 4-5 As shown, the jack 5 is mounted on a rotating seat 53, which is rotatably connected to a sliding seat 52. A bearing is installed between the rotating seat 53 and the sliding seat 52. The rotating seat 53 is fixedly connected to the inner ring of the bearing, and the sliding seat 52 is fixedly connected to the outer ring of the bearing, allowing the rotating seat 53 to rotate horizontally. A locking bolt 54 is installed on the rotating seat 53. The locking bolt 54 passes through the rotating seat 53 and abuts against the upper end face of the sliding seat 52, locking the rotating seat 53 and preventing further horizontal rotation. A pulley 51 is installed at the bottom of the sliding seat 52, and the pulley 51 is located within the slide rail 41 of the crossbar 4, allowing the lateral position of the jack 5 to be adjusted.

[0038] Specifically, such as Figure 6 As shown, during use, the trolley 1 is moved to the edge of the bridge 9, and then the hoist 8 is used to lower the boom 3, crossbar 4 and jack 5 so that the jack 5 is located below the bridge 9. Then, the boom 3 and crossbar 4 are manually rotated so that the crossbar 4 faces inward. Then, the jack 5 is moved so that the jack 5 corresponds to the position of the prestressed steel strand of the bridge. Then, the jack 5 is rotated by the rotating seat 53 so that the jack 5 is aligned with the prestressed steel strand of the bridge. After that, the jack 5 is connected to the prestressed steel strand. The jack 5 applies the design tension to the steel strand, thereby realizing the negative bending moment tensioning of the bridge 9.

[0039] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A convenient integrated tensioning device for bridge negative bending moment, comprising: The mobile trolley (1), support (2), boom (3), crossbar (4) and jack (5) are characterized in that the support (2) is a vertically arranged square frame structure, the support (2) is provided with a vertically arranged guide component on the outside of the support (2), and the boom (3) is vertically inserted in the guide component so that the boom (3) can move along the vertical direction of the support (2); The bracket (2) is provided with a lifting mechanism. The crossbar (4) is fixed to the bottom of the lifting rod (3), and one end of it extends outward to form a lifting part (42), while the other end is used to place the jack (5). The jack (5) is configured to move along the crossbar (4). The mobile trolley (1) has a fixed frame (11) at the end away from the support, and the tensioning equipment host (6) is set inside the fixed frame (11).

2. The convenient integrated tensioning device for bridge negative bending moment as described in claim 1, characterized in that, The guide assembly includes at least one guide sleeve (71), and the boom (3) passes through the guide sleeve (71).

3. The convenient integrated tensioning device for bridge negative bending moment as described in claim 2, characterized in that, Two guide sleeves (71) are provided and distributed at the upper and lower ends of the bracket (2), and a guide ring (72) is provided between the two guide sleeves (71).

4. The convenient integrated tensioning device for bridge negative bending moment as described in claim 2 or 3, characterized in that, The guide sleeve (71) is provided with a plurality of balls (73) arranged along the inner circumference of the guide sleeve (71).

5. The convenient integrated tensioning device for bridge negative bending moment as described in claim 1, characterized in that, A slide rail (41) is provided on the crossbar (4), and the jack (5) is slidably connected to the slide rail (41).

6. The convenient integrated tensioning device for bridge negative bending moment as described in claim 5, characterized in that, The jack (5) is mounted on the rotating seat (53), which is rotatably connected to the sliding seat (52), and the sliding seat (52) is slidably connected to the slide rail (41).

7. The convenient integrated tensioning device for bridge negative bending moment as described in claim 6, characterized in that, The bottom of the sliding seat (52) is provided with a pulley (51).

8. The convenient integrated tensioning device for bridge negative bending moment as described in claim 6 or 7, characterized in that, The rotating seat (53) is provided with a locking element, which is used to lock the rotating seat (53) to lock the jack (5).

9. The bridge negative bending moment convenient integrated tensioning device as described in claim 1, characterized in that, The lifting mechanism is a manual hoist (8), and a lifting ring (43) is provided on the lifting part (42). The manual hoist (8) is connected to the lifting ring (43).

10. The convenient integrated tensioning device for bridge negative bending moment as described in claim 1, characterized in that, The mobile trolley (1) is provided with a support leg (12) at the end away from the support (2).

Images