Precast beam hogging moment tensioning trolley

Abstract

The utility model belongs to the technical field of bridge construction, and discloses a precast beam hogging moment tensioning trolley which comprises a frame, moving wheels are installed at the bottom corners of the left side and the right side of the frame, a fixing sleeve is welded to the frame, and a cross beam is fixedly connected to the bottom of the fixing sleeve. The left end and the right end of the bottom of the cross beam are connected with a left fixed hanging lug and a right fixed hanging lug respectively, grooves are formed in the two sides of the cross beam, walking wheels are arranged in the grooves, the sides, away from each other, of the walking wheels are connected with movable hanging lugs through bearings, and adjusting supporting legs are installed at the four corners of the bottom of the frame. The cross beam is fixed to the middle of the bottom of the top square frame, the ends of the cross beam extend to the positions above the wet joints on the left side and the right side, then the movable hanging lugs are moved to the positions above the corresponding wet joints through the walking wheels, and a hanging bracket connected with the movable hanging lugs can work on the three wet joints under the condition that the position of the tensioning trolley is not changed.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a prefabricated beam negative bending moment tensioning trolley. Background Art

[0002] The precast beam negative bending moment tensioning trolley is a kind of equipment used in bridge construction. It is mainly used for tensioning construction of negative bending moment on the outer side of the side span of precast T-beam bridge. The advantages of the precast beam negative bending moment tensioning trolley include easy operation, improved construction efficiency, and reduced risks of high-altitude operations.

[0003] In the prior art, the negative moment tensioning trolley for precast beams can only perform construction work on the corresponding wet joints below them. If construction work is required on the wet joints on the left and right sides, the negative moment tensioning trolley for precast beams needs to be moved horizontally to the top of the corresponding wet joints, resulting in low construction efficiency.

[0004] Therefore, in order to solve the above problems, a prefabricated beam negative moment tensioning trolley is proposed. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a precast beam negative bending moment tensioning trolley, which has the advantage of performing construction operations on wet joints below and on both sides of the precast beam negative bending moment tensioning trolley, thereby improving construction efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a prefabricated beam negative bending moment tensioning trolley, comprising a frame, movable wheels are installed at the bottom corners of the left and right sides of the frame, a fixed sleeve is welded on the frame, a crossbeam is fixedly connected to the bottom of the fixed sleeve, a left fixed ear and a right fixed ear are respectively connected to the left and right ends of the bottom of the crossbeam, grooves are provided on both sides of the crossbeam, walking wheels are provided in the grooves, a movable ear is connected to the side away from the walking wheel through a bearing, and adjustable support legs are installed at the four corners of the bottom of the frame.

[0007] Preferably, the frame comprises a bottom square frame, vertical poles, and a top square frame, and the four corners of the top of the bottom square frame are fixedly connected to the top square frame via vertical poles.

[0008] Preferably, the crossbeam is fixed at the middle position of the bottom of the top square frame, and the length of the crossbeam is greater than the width of the frame.

[0009] Preferably, the movable hanging ear comprises an arc segment and a vertical segment, the top of the arc segment is fixedly connected to the vertical segment, and the opposite side of the vertical segment is connected to the running wheel via a bearing.

[0010] Preferably, a positioning bolt is provided on the vertical section, the end of the positioning bolt abuts against the cross beam, and an anti-slip sheet is provided on the end of the positioning bolt.

[0011] Preferably, the tops of the left fixing ear and the right fixing ear are fixedly connected with fixing plates, and fixing bolts are provided at the four corners of the fixing plate, and the fixing bolts are threadedly connected to the crossbeam.

[0012] Preferably, the adjustable support leg includes a fixed platform, the fixed platform is fixedly connected to the frame, the bottom of the fixed platform is fixedly connected to a screw rod, the screw rod is threadedly connected to a threaded tube, the outer surface of the threaded tube is provided with anti-slip grooves, and the bottom of the threaded tube is connected to a supporting foot.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model uses structures such as a crossbeam whose length is greater than the width of the frame, a running wheel, and a movable hanging ear. The end of the crossbeam is extended to the top of the wet joints on the left and right sides, and then the movable hanging ear is moved to the top of the corresponding wet joint by the running wheel, so that the hanger connected to the movable hanging ear can operate on the three wet joints without changing the position of the tensioning trolley;

[0015] 2. The utility model provides an adjustable support leg, which is moved on the screw rod by rotating the threaded tube, so that the support foot is supported on the T-beam. On the one hand, the position of the tensioning trolley can be fixed, and on the other hand, its height can be adjusted, making the tensioning trolley more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the crossbeam of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the movable hanging ear of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the adjustable support leg of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the left fixed hanging ear of the utility model.

[0021] In the figure: 1, frame; 101, bottom square frame; 102, upright pole; 103, top square frame;

[0022] 2. Moving wheel; 3. Fixed sleeve; 4. Crossbeam; 5. Left fixed lug; 6. Right fixed lug; 7. Groove; 8. Travel wheel;

[0023] 9. movable hanging ear; 901. arc segment; 902. vertical segment;

[0024] 10. Adjust the support legs; 1001. Fix the platform; 1002. Screw rod; 1003. Threaded pipe; 1004. Support feet;

[0025] 11. Positioning bolt; 12. Anti-slip sheet; 13. Fixing plate; 14. Fixing bolt. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] Example. Figures 1 to 5 As shown, the utility model provides a prefabricated beam negative bending moment tensioning trolley, including a frame 1, and movable wheels 2 are installed at the bottom corners of the left and right sides of the frame 1. The construction personnel can push the frame 1 to make the movable wheels 2 rotate, which is used for the movement of the prefabricated beam negative bending moment tensioning trolley. A fixing sleeve 3 is welded on the frame 1, and a cross beam 4 is fixedly connected to the bottom of the fixing sleeve 3. The left and right ends of the bottom of the cross beam 4 are respectively connected to a left fixed hanging ear 5 and a right fixed hanging ear 6. The left fixed hanging ear 5 and the right fixed hanging ear 6 are both connected to a safety rope, and the other end of the safety rope is connected to the beam sheet, which can effectively prevent the prefabricated beam negative bending moment tensioning trolley from tipping over and ensure the stability of the prefabricated beam negative bending moment tensioning trolley during construction. Grooves 7 are provided on both sides of the cross beam 4, and the walking wheels 8 roll in the grooves 7 to form a movable hanging ear 9. The movable ear 9 can be moved to the top of the left, middle and right three wet joints to facilitate construction work on the three wet joints without moving the negative bending moment tensioning trolley of the precast beam, so as to expand the construction range of the negative bending moment tensioning trolley of the precast beam. Adjustable support legs 10 are installed at the four corners of the bottom of the frame 1. The threaded tube 1003 is rotated to move it up and down on the screw rod 1002, and then the support foot 1004 is supported on the top surface of the T beam, which can not only ensure the fixation of the position of the negative bending moment tensioning trolley of the precast beam, but also prevent the uneven top surface of the T beam from causing the negative bending moment tensioning trolley of the precast beam to shake, thereby greatly improving the stability of the negative bending moment tensioning trolley of the precast beam during construction.

[0028] Specifically, the frame 1 includes a bottom square frame 101 , a vertical pole 102 , and a top square frame 103 . The top four corners of the bottom square frame 101 are fixedly connected to the top square frame 103 via the vertical pole 102 .

[0029] Furthermore, the crossbeam 4 is fixed at the middle position of the bottom of the top square frame 103, the length of the crossbeam 4 is greater than the width of the frame 1, and both ends of the crossbeam 4 should reach above the wet joints on the left and right sides, so that the movable hanging ears 9 can be moved to above the wet joints on the left and right sides to facilitate the construction operation of the precast beam negative bending moment tensioning trolley.

[0030] Furthermore, the movable hanging ear 9 includes an arc segment 901 and a vertical segment 902. The top of the arc segment 901 is fixedly connected to the vertical segment 902. The opposite side of the vertical segment 902 is connected to the running wheel 8 through a bearing. The vertical segment 902 is located on both sides of the beam 4 to form a limit.

[0031] It is worth mentioning that a positioning bolt 11 is provided on the vertical section 902, and the end of the positioning bolt 11 is against the cross beam 4. An anti-slip sheet 12 is provided at the end of the positioning bolt 11, and the end of the positioning bolt 11 is against the cross beam 4 to fix the position of the movable hanging ear 9 to prevent movement during construction.

[0032] It is worth noting that the tops of the left fixed ear 5 and the right fixed ear 6 are fixedly connected with a fixing plate 13, and fixing bolts 14 are provided at the four corners of the fixing plate 13. The fixing bolts 14 are threadedly connected to the crossbeam 4, so that the left fixed ear 5 and the right fixed ear 6 can be installed and disassembled, so that the left fixed ear 5, the right fixed ear 6, and the movable ear 9 can be replaced when damaged.

[0033] It is worth mentioning that the adjustable support leg 10 includes a fixed platform 1001, the fixed platform 1001 is fixedly connected to the frame 1, the bottom of the fixed platform 1001 is fixedly connected with a screw rod 1002, the screw rod 1002 is threadedly connected with a threaded tube 1003, the outer surface of the threaded tube 1003 is provided with anti-slip grooves, and the bottom of the threaded tube 1003 is connected with a supporting foot 1004 to ensure the stability of the prefabricated beam negative bending moment tensioning trolley during construction.

[0034] Working principle and process: The precast beam negative bending moment tensioning trolley spans over the wet joint, and the moving wheel 2 moves on the top surface of the T-beam on both sides of the wet joint. After reaching the working position, the threaded tube 1003 of the support leg 10 is rotated and adjusted, and the threaded tube 1003 moves downward along the screw rod 1002 until the supporting foot 1004 at the bottom of the threaded tube 1003 is against the top surface of the T-beam to fix the position of the precast beam negative bending moment tensioning trolley to prevent the precast beam negative bending moment tensioning trolley from moving during construction, and can adjust the position of the four corners of the bottom of the precast beam negative bending moment tensioning trolley to avoid the negative bending moment of the precast beam due to the uneven top surface of the T-beam. The tensioning trolley shakes to ensure the stability of the precast beam negative bending moment tensioning trolley during construction. The left fixed hanging ear 5 and the right fixed hanging ear 6 are both connected to safety ropes, and the other ends of the safety ropes are respectively connected to the corresponding beam pieces to prevent the precast beam negative bending moment tensioning trolley from tipping over during construction. By pushing the movable hanging ear 9, the movable hanging ear 9 can be located above one of the three wet joints on the left, middle and right, and then the positioning bolt 11 is rotated to make its end rest against the cross beam 4 to fix the position of the movable hanging ear 9, thereby carrying out construction operations, effectively expanding the construction range of the precast beam negative bending moment tensioning trolley and improving construction efficiency.

[0035] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical solution and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A prefabricated beam negative moment tensioning trolley, comprising a frame (1), characterized in that: The frame (1) is provided with movable wheels (2) at the bottom corners on both sides. A fixing sleeve (3) is welded on the frame (1). The bottom of the fixing sleeve (3) is fixedly connected to a crossbeam (4). The left and right ends of the bottom of the crossbeam (4) are respectively connected to a left fixed hanging ear (5) and a right fixed hanging ear (6). Grooves (7) are provided on both sides of the crossbeam (4). Traveling wheels (8) are provided in the grooves (7). The side away from the traveling wheel (8) is connected to a movable hanging ear (9) via a bearing. Adjustable support legs (10) are provided at the four corners of the bottom of the frame (1).

2. The precast beam negative moment tensioning trolley according to claim 1, characterized in that: The frame (1) comprises a bottom square frame (101), vertical poles (102), and a top square frame (103); the top four corners of the bottom square frame (101) are fixedly connected to the top square frame (103) via the vertical poles (102).

3. The precast beam negative moment tensioning trolley according to claim 2, characterized in that: The crossbeam (4) is fixed to the middle of the bottom of the top square frame (103), and the length of the crossbeam (4) is greater than the width of the frame (1).

4. The precast beam negative moment tensioning trolley according to claim 1, characterized in that: The movable hanging ear (9) comprises an arc segment (901) and a vertical segment (902); the top of the arc segment (901) is fixedly connected to the vertical segment (902); and the opposite side of the vertical segment (902) is connected to a running wheel (8) via a bearing.

5. The negative moment tensioning trolley for precast beams according to claim 4, characterized in that: The vertical section (902) is provided with a positioning bolt (11), the end of the positioning bolt (11) abuts against the crossbeam (4), and the end of the positioning bolt (11) is provided with an anti-slip sheet (12).

6. The precast beam negative moment tensioning trolley according to claim 1, characterized in that: The tops of the left fixed hanging ear (5) and the right fixed hanging ear (6) are both fixedly connected to a fixing plate (13), and fixing bolts (14) are provided at four corners of the fixing plate (13), and the fixing bolts (14) are threadedly connected to the crossbeam (4).

7. The precast beam negative moment tensioning trolley according to claim 1, characterized in that: The adjustable support leg (10) comprises a fixed platform (1001), the fixed platform (1001) is fixedly connected to the frame (1), the bottom of the fixed platform (1001) is fixedly connected to a screw rod (1002), the screw rod (1002) is threadedly connected to a threaded tube (1003), the outer surface of the threaded tube (1003) is provided with anti-slip grooves, and the bottom of the threaded tube (1003) is connected to a support foot (1004).

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