Hanging bracket for box girder tensioning construction

Abstract

The utility model relates to the technical field of hanging brackets for tensioning construction of box girders, in particular to a hanging bracket for tensioning construction of box girders, which comprises a front bracket body arranged on a box girder template, a rear bracket body arranged on the front side of the front bracket body, and two movable hoisting components separately arranged between a combined bracket body formed by welding the front bracket body and the rear bracket body, two mounting grooves are separately formed in a bottom cross beam of the rear frame body; the protection assembly comprises a first protection plate, a second protection plate and a third protection plate movably arranged between the first protection plate and the second protection plate, and the protection assembly is used for preventing constructors from being hurt by splashing and popping of clamping pieces used for fixing jacks on the steel strand sets in the box girder tensioning construction; and the connecting unit is arranged in the mounting groove. When the jack is used for tensioning a steel strand group on the surface of a box girder, a constructor standing in the forward direction of the steel strand group can be effectively prevented from being injured by splashing and popping of the clamping pieces for fixing, and the life safety of the constructor is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of hangers for box girder tensioning construction, in particular to a hanger for box girder tensioning construction. Background Art

[0002] During bridge construction, the steel strands in precast concrete box girders need to be tensioned. During this process, anchors and jacks are installed at the ends of the strands to apply prestress. Because there are multiple transverse strands at different heights and positions on the box girder cross-section, the jacks need to be moved to the corresponding positions for tensioning. The specialized jacks used for tensioning are heavy and difficult to move and position manually, requiring the use of specialized hangers.

[0003] At present, a special hanger has solved the problem of the inconvenience of transferring the large and heavy jacks at the ends of the box beams. However, in the existing box beam tensioning construction hanger, when the jacks are used for tensioning construction, no warning area is set, and the clips used to fix the jacks on the steel strand groups will fly out, causing nearby construction workers to be injured by the clips, which is not in line with the concept of safe construction.

[0004] The above content is only used to assist in understanding the technical solution of the present invention and does not mean that the above content is the closest prior art. Utility Model Content

[0005] The purpose of the utility model is to solve the above-mentioned deficiencies and provide a hanger for box girder tensioning construction.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: a hanger for box girder tensioning construction, comprising a front frame body arranged on the box girder formwork, a rear frame body welded to the front side of the front frame body through a longitudinal beam, two mobile lifting assemblies for lifting jacks for tensioning steel strand groups up, down, left and right are separately arranged between the combined frame bodies welded between the front frame body and the rear frame body, and two mounting slots are separately arranged on the bottom crossbeam of the rear frame body;

[0007] A protection assembly, comprising a protection plate 1 and a protection plate 2 respectively arranged outside the two mounting slots, and a protection plate 3 movably arranged between the protection plate 1 and the protection plate 2, used for protecting a clip for fixing a jack on the steel strand assembly;

[0008] The connecting unit is arranged inside the installation groove and is used for convenient installation and removal of the protective components assembled on the rear frame.

[0009] Furthermore, the protective assembly also includes a groove arranged on the top of the protective plate 1 and the protective plate 2, and a top block is provided at the bottom of the inner groove of the groove.

[0010] Furthermore, slots for upward and downward sliding connection are provided at both ends of the protective plate three and at the adjacent ends on the protective plate one and the protective plate two.

[0011] Furthermore, a protective pad for mitigating the impact of the clip is provided on one side of the protective plate 1 and the protective plate 2 corresponding to the box beam template.

[0012] Furthermore, the connecting unit includes a trapezoidal wedge block 1 arranged inside the mounting groove, and two trapezoidal wedge blocks 2 symmetrically arranged on both sides of the trapezoidal wedge block 1 and with inclined surfaces fitting together. The bottom of the trapezoidal wedge block 1 is provided with a top rod passing through the bottom of the mounting groove, and the two separated straight surfaces on the trapezoidal wedge blocks 2 are provided with positioning rods passing through the side of the mounting groove.

[0013] Furthermore, the push rod and the positioning rod are both provided with springs fixed to the inner wall of the installation groove.

[0014] Furthermore, circular hole channels for limiting and fixing the positioning rod are provided on the supporting surfaces on both sides of the groove.

[0015] Furthermore, the top opening of the installation slot is provided with an inspection cover.

[0016] Compared with the existing technology, the utility model has the following beneficial effects: the utility model, through the protective component arranged on the bottom cross beam of the rear frame, can effectively prevent construction workers standing in the forward direction of the steel strand group from being injured by the splashing and popping of the fixing clips during the tensioning construction of the steel strand group on the surface of the box beam using a jack, thereby protecting the lives of construction workers; and through the provided connection unit, the protective component installed on the frame can be quickly constructed, saving installation and disassembly time, improving construction efficiency, and facilitating later replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A three-dimensional structural diagram of an embodiment of the present invention from one perspective;

[0019] Figure 2 A three-dimensional structural diagram of a protective assembly according to an embodiment of the present invention from one perspective;

[0020] Figure 3 A three-dimensional structural diagram of an embodiment of the present invention from another perspective;

[0021] Figure 4 for Figure 3Enlarged structural diagram at point A in the middle.

[0022] In the figure: 1. Front frame; 2. Rear frame; 3. Mobile lifting assembly; 4. Mounting slot; 5. Protection assembly; 51. Protection plate 1; 52. Protection plate 2; 53. Protection plate 3; 54. Groove; 55. Top block; 56. Slot; 57. Protection pad; 58. Circular hole channel; 6. Connecting unit; 61. Trapezoidal wedge block 1; 62. Trapezoidal wedge block 2; 63. Top rod; 64. Positioning rod; 7. Inspection cover. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes in which A and B are satisfied at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] like Figure 1-4As shown, the utility model is a hanger for box girder tensioning construction, comprising a front frame body 1 arranged on the box girder formwork, a rear frame body 2 welded to the front side of the front frame body 1 through a longitudinal beam, two mobile lifting assemblies 3 for lifting jacks for tensioning steel strand groups up, down, left, and right are separately provided between the combined frame bodies welded between the front frame body 1 and the rear frame body 2, and two mounting slots 4 are separately provided on the bottom crossbeam of the rear frame body 2;

[0027] The protection assembly 5 includes a protection plate 1 51 and a protection plate 2 52 respectively arranged outside the two mounting slots 4, and a protection plate 3 53 movably arranged between the protection plate 1 51 and the protection plate 2 52, which is used to protect the clip used to fix the jack on the steel strand group;

[0028] The connecting unit 6 is disposed within the mounting slot 4 and is used to facilitate installation and removal of the protective assembly 5 assembled on the rear frame 2. This design, through the two separately designed mounting slots 4 machined on the bottom crossbeam of the rear frame 2 and the protective frame composed of a combination of protective plate 1 51, protective plate 2 52, and protective plate 3 53 connected to the outside of the mounting slot 4, can prevent the clips used to secure the jacks on the steel strand assembly from flying out and injuring construction workers standing in front of the steel strand assembly during box girder tensioning construction, thereby protecting the lives of construction workers and improving the safety of this embodiment.

[0029] Furthermore, by designing the connection unit 6 in the installation groove 4, the protective assembly 5 can be quickly installed on the frame, saving installation and disassembly time, improving construction efficiency, and facilitating later replacement.

[0030] It should be noted that the mobile lifting assembly 3 includes but is not limited to two hand-pushed carriages that move on the top crossbeams of the front frame 1 and rear frame 2, longitudinally distributed sliding beams fixed to the support frames of the two hand-pushed carriages, and an electric hoist with a load capacity of 1 ton that slides longitudinally on the sliding beams, and the electric hoist is used to pull the jack equipment used for tensioning construction. This design allows the jack to be lifted up, down, left, and right, so that it can be moved to the position corresponding to the steel strand group to perform box girder tensioning construction.

[0031] It should be noted that the shape of the frame composed of the protective plate 1 51 , the protective plate 2 52 and the protective plate 3 53 matches the distribution shape of the steel strand group passing through the box beam template.

[0032] In one embodiment, the protective assembly 5 further includes a groove 54 formed on the top of the first protective plate 51 and the second protective plate 52, with a top block 55 disposed at the bottom of the inner groove of the groove 54. This design allows the first protective plate 51 and the second protective plate 52 to be moved upwards on the assembled frame, with the top block 55 on the top of the first protective plate 51 and the second protective plate 52 generating an upward extrusion thrust, thereby achieving the subsequent connection function.

[0033] In one embodiment, slots 56 for upward and downward sliding connection are provided at both ends of the third guard plate 53, near the ends of the first guard plate 51 and the second guard plate 52. This design allows the third guard plate 53 to be vertically inserted from top to bottom into the slots 56 near the bottom of the first guard plate 51 and the second guard plate 52, thus completing the assembly of the third guard plate 53 on the first guard plate 51 and the second guard plate 52. If damaged, only the damaged portion needs to be replaced, reducing maintenance costs.

[0034] In one embodiment, protective pads 57 for mitigating impacts from clips are provided on the sides of the first and second protective plates 51, 52 corresponding to the box girder formwork. This design, by adhering protective pads 57 to the surfaces of the combined frame of the first, second, and third protective plates 51, 52, and 53, effectively mitigates the impact of the clips used to secure the jacks on the strand assembly on the protective assembly 5, thereby extending the service life of the protective assembly 5.

[0035] In one embodiment, the connecting unit 6 includes a trapezoidal wedge block 61 arranged inside the mounting groove 4, and two trapezoidal wedge blocks 62 symmetrically arranged on both sides of the trapezoidal wedge block 61 and with inclined surfaces fitted together. The bottom of the trapezoidal wedge block 61 is provided with a top rod 63 passing through the bottom of the mounting groove 4, and the two separated straight surfaces of the trapezoidal wedge blocks 62 are provided with positioning rods 64 passing through the side of the mounting groove 4. With this design, the trapezoidal wedge block 1 61 welded on the top of the top rod 63 that is vertically slidably connected in the groove turned at the bottom of the installation groove 4, as well as the trapezoidal wedge block 2 62 that fits the two inclined surfaces of the trapezoidal wedge block 1 61 and the positioning rod 64 that is directly welded on the trapezoidal wedge block 2 62, can drive the top rod 63 and the trapezoidal wedge block 1 61 welded on the top rod 63 to move upward when the top rod 63 is subjected to the upward extrusion force of the top block 55. At this time, the trapezoidal wedge block 2 62 that fits the inclined surface of the trapezoidal wedge block 1 61 will move away from each other under the horizontal guidance of the positioning rod 64, so that the positioning rod 64 horizontally welded on the trapezoidal wedge block 2 62 moves outward and is horizontally connected with the corresponding protective plate 1 51 or protective plate 2 52, thereby realizing the fixed assembly of the protective component 5 on the bottom crossbeam of the rear frame 2.

[0036] In one embodiment, both the push rod 63 and the positioning rod 64 are provided with springs fixed to the inner wall of the mounting groove 4. This design facilitates the installation of a spring sleeved on the push rod 63, with the lower end of the spring welded to the inner bottom surface of the mounting groove 4 and the upper end of the spring welded to the bottom surface of the first trapezoidal wedge 61. Furthermore, the spring sleeved on the positioning rod 64 has one end welded to the inner side surface of the mounting groove 4 and the other end welded to the straight surface of the corresponding second trapezoidal wedge 62. Due to the elastic action of these two springs, the first trapezoidal wedge 61 and the second trapezoidal wedge 62 will automatically return to their initial state when no external force is applied, thereby facilitating the installation process and simplifying the operation.

[0037] In one embodiment, circular hole channels 58 are provided on opposite supporting surfaces on both sides of the groove 54 for limiting and fixing the positioning rods 64. This design allows two circular hole channels 58 to be formed through the opposite supporting surfaces on both sides of the groove 54 by turning. Since the openings on both sides of the circular hole channels 58 are interconnected, the opening on one side of the circular hole channel 58 can be connected to the positioning rods 64 welded on the horizontally outwardly moved trapezoidal wedge block 2 62 to achieve a locking effect, while the opening on the other side of the circular hole channel 58 can be used to use a tool to press the ends of the positioning rods 64 welded on the trapezoidal wedge block 2 62 inward to separate the protective assembly 5 of the bottom crossbeam on the rear frame 2, thereby achieving convenient installation and disassembly, improving construction efficiency, and facilitating inspection and maintenance.

[0038] In one embodiment, the top opening of the mounting slot 4 is provided with an inspection cover 7. This design allows the inspection cover 7 to be fixed with screws on both sides of the top opening of the mounting slot 4, allowing the inspection cover 7 to be removed regularly to inspect and maintain the relevant structures inside the mounting slot 4, which is convenient to operate.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A hanger for box girder tensioning construction, comprising a front frame (1) arranged on a box girder formwork, a rear frame (2) welded to the front side of the front frame (1) via a longitudinal beam, two movable lifting assemblies (3) for lifting jacks for tensioning steel strands in the upper, lower, left, and right directions are separately arranged between the welded combined frame of the front frame (1) and the rear frame (2), and characterized in that: Two mounting slots (4) are separately provided on the bottom crossbeam of the rear frame (2); A protection assembly (5) includes a protection plate 1 (51) and a protection plate 2 (52) correspondingly arranged outside the two mounting slots (4), and a protection plate 3 (53) movably arranged between the protection plate 1 (51) and the protection plate 2 (52), and is used for securing a clamping piece for a jack on the protection steel strand assembly; The connection unit (6) is arranged inside the installation groove (4) and is used for conveniently installing and removing the protective component (5) assembled on the rear frame (2).

2. A hanger for box girder tensioning construction according to claim 1, characterized in that: The protection assembly (5) further comprises a groove (54) arranged on the top of the first protection plate (51) and the second protection plate (52), and a top block (55) is arranged at the bottom of the inner groove of the groove (54).

3. A hanger for box girder tensioning construction according to claim 2, characterized in that: Slots (56) for upward and downward sliding connection are provided at both ends of the protective plate three (53) and at the adjacent ends on the protective plate one (51) and the protective plate two (52).

4. A hanger for box girder tensioning construction according to claim 3, characterized in that: A protective pad (57) for alleviating the impact of the clip is provided on one side of the protective plate 1 (51) and the protective plate 2 (52) corresponding to the box beam template.

5. A hanger for box girder tensioning construction according to claim 4, characterized in that: The connecting unit (6) comprises a trapezoidal wedge block (61) arranged inside the mounting groove (4), and two trapezoidal wedge blocks (62) symmetrically arranged on both sides of the trapezoidal wedge block (61) and with inclined surfaces fitted together. The bottom of the trapezoidal wedge block (61) is provided with a top rod (63) passing through the bottom of the mounting groove (4), and the two separated straight surfaces of the two trapezoidal wedge blocks (62) are provided with positioning rods (64) passing through the side of the mounting groove (4).

6. A hanger for box girder tensioning construction according to claim 5, characterized in that: The push rod (63) and the positioning rod (64) are both provided with springs fixed to the inner wall of the installation groove (4).

7. The hanger for box girder tensioning construction according to claim 5, characterized in that: Circular hole channels (58) for limiting and fixing the positioning rod (64) are provided on opposite supporting surfaces on both sides of the groove (54).

8. The hanger for box girder tensioning construction according to claim 1, characterized in that: The top opening of the installation slot (4) is provided with an inspection cover (7).

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