A prefabricated t-beam negative bending moment jack launching trolley

Abstract

The utility model discloses a prefabricated T beam negative bending moment jack lower platform truck, including movable platform truck, longitudinal track, transverse track and hanger subassembly, one side of movable platform truck is installed with vertical support structure, and the other side is installed with counterweight, to balance the overturning moment that jack is in the negative bending moment tensioning operation and produces, improves construction security, longitudinal track is fixed at the top of vertical support structure, and one end of transverse track is slidably connected with longitudinal track, and the other end is slidably connected with hanger subassembly, sets up the support at the bottom of hanger subassembly, and installs jack on the support, so that jack can move in horizontal plane transversely or longitudinally, and through the mode of lifting enters target tensioning slot and carries out tensioning operation, avoids the construction personnel to hang in the air and push and pull jack under the bridge, has improved the security of negative bending moment tensioning operation, and has improved the jack in position efficiency simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of bridge construction technology, specifically relating to a precast T-beam negative bending moment jack lowering trolley. Background Technology

[0002] In the construction of conventional bridges using precast T-beams, negative moment tensioning is typically required for the bridge deck system. Currently, negative moment tensioning slots are generally located on both sides of the web of the precast T-beam, with the bottom of the slots being a suspended structure. Because the jacks used for tensioning are quite heavy, traditional construction methods usually require setting up temporary supports above the negative moment slots, using hand-operated hoists to lift the jacks from the bridge deck to a position below the deck, and then having workers below the deck install the jacks into the tensioning slots for the tensioning operation.

[0003] However, this conventional construction method presents significant safety risks: after the jacks are hoisted below the bridge deck, a certain horizontal distance remains between them and the tensioning slot. Workers must then move the heavy jacks to the slot while suspended below the bridge deck. During this operation, workers not only have to overcome the weight of the jacks but also maintain their balance within a limited working space, making them highly susceptible to falls due to instability or operational difficulties, posing a significant safety hazard. Furthermore, this method is inefficient, with difficulties in positioning the jacks, thus impacting the overall construction progress.

[0004] Therefore, how to provide a trolley for lowering precast T-beam negative moment jacks to save physical labor, effectively improve the safety of negative moment tensioning operations, and reduce construction risks is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to provide a precast T-beam negative bending moment jack lowering trolley to at least solve one of the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model provides a precast T-beam negative moment jack lowering trolley, the lowering trolley comprising: a mobile trolley, one side of which is equipped with a vertical support structure and the other side with a counterweight; a longitudinal track fixed to the top of the vertical support structure; a transverse track, one end of which is slidably connected to the longitudinal track; and a suspension assembly, the top end of which is slidably connected to the other end of the transverse track, and the bottom end of which is provided with a bracket for the jack; wherein, the suspension assembly, under the action of the longitudinal track and the transverse track, drives the bracket to move in space, thereby realizing the lifting and lowering of the jack.

[0007] Preferably, the mobile trolley includes: a plurality of angle steels, which are connected end to end to form a square frame; a plurality of casters, which are installed at the bottom of the square frame; wherein the vertical support structure is fixedly connected to one side of the square frame, and the balance block is detachably connected to the other side of the square frame.

[0008] Preferably, the vertical support structure includes several thin-walled round steel columns, which are vertically fixed to the square frame; the top of each thin-walled round steel column is provided with a longitudinal track.

[0009] Preferably, the lowering trolley further includes a first movable pulley, the fixed end of which is fixedly connected to the transverse track, and the sliding end of which is snapped against both sides of the web of the longitudinal track and slides along the length of the longitudinal track.

[0010] Preferably, the lowering trolley further includes a second movable pulley, the fixed end of which is fixedly connected to the hanging assembly, and the sliding end of which is engaged with the flange plate of the transverse track and slides along the length of the transverse track.

[0011] Preferably, a turntable is installed between the second movable pulley and the hanging assembly, the rotating shaft of the turntable is connected to the fixed end of the second movable pulley, and the turntable is fixedly connected to the hanging assembly.

[0012] Preferably, the hanging assembly includes: a vertical track, the top end of which is fixedly connected to the turntable; a hand chain hoist, the body of which is detachably connected to the turntable; an upper and lower reversing box, which is slidably connected to the vertical track; the upper and lower reversing box is fixedly connected to the bracket; wherein the chain of the hand chain hoist is connected to the upper and lower reversing box.

[0013] Preferably, the bracket is an "L"-shaped bracket, the vertical arm of the "L"-shaped bracket is fixedly connected to the upper and lower reversing boxes, and the horizontal arm of the "L"-shaped bracket is used to install jacks.

[0014] Preferably, the horizontal arm of the "L"-shaped bracket is provided with mounting holes for fixing the jack.

[0015] Preferably, each of the casters is equipped with a brake.

[0016] Beneficial effects: This utility model provides a precast T-beam negative moment jack lowering trolley, comprising: a mobile trolley, a longitudinal track, a transverse track, and a suspension assembly. A vertical support structure is installed on one side of the mobile trolley, and a counterweight is installed on the other side to balance the overturning moment generated by the jack during negative moment tensioning operations, thereby improving construction safety. The longitudinal track is fixed to the top of the vertical support structure. One end of the transverse track is slidably connected to the longitudinal track, and the other end is slidably connected to the suspension assembly. A bracket is set at the bottom of the suspension assembly, and the jack is installed on the bracket, allowing the jack to move laterally or longitudinally in the horizontal plane. Simultaneously, it enters the target tensioning slot for tensioning operations through lifting and lowering, avoiding the need for construction personnel to push and pull the jack suspended under the bridge deck, thus improving the safety of negative moment tensioning operations and increasing the efficiency of jack placement.

[0017] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the overall structure of a prefabricated T-beam negative bending moment jack lowering trolley provided by this utility model; Figure 2 This is an assembly drawing of the second movable pulley in this utility model; Figure label: 1. Mobile trolley; 11. Angle steel; 12. Casters; 13. Thin-walled round steel column; 14. Balance weight; 2. Longitudinal track; 3. Horizontal track; 4. Suspension assembly; 41. Vertical track; 42. Hand chain hoist; 43. Up and down reversing box; 5. Bracket; 6. Jack; 7. First moving pulley; 8. Second moving pulley; 9. Turntable. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. At the same time, the descriptions involving "first", "second", etc. in the present utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of those features. In addition, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present utility model.

[0021] Example 1 Please see Figure 1-2 This embodiment provides a prefabricated T-beam negative bending moment jack 6 lowering trolley. The lowering trolley includes: a mobile trolley 1, with a vertical support structure installed on one side and a counterweight 14 installed on the other side; a longitudinal track 2, fixed to the top of the vertical support structure; a transverse track 3, one end of which is slidably connected to the longitudinal track 2; and a hanging assembly 4, the top end of which is slidably connected to the other end of the transverse track 3, and a bracket 5 provided at the bottom end of the hanging assembly 4 for the jack 6. The hanging assembly 4, under the action of the longitudinal track 2 and the transverse track 3, drives the bracket 5 to move in space, thereby realizing the lifting and lowering of the jack 6.

[0022] Specifically, the present invention provides a precast T-beam negative moment jack 6 lowering trolley comprising: a mobile trolley 1, a longitudinal track 2, a transverse track 3, and a suspension assembly 4. A vertical support structure is installed on one side of the mobile trolley 1, and a counterweight 14 is installed on the other side to balance the overturning moment generated by the jack 6 during negative moment tensioning operations, thereby improving construction safety. The longitudinal track 2 is fixed to the top of the vertical support structure. One end of the transverse track 3 is slidably connected to the longitudinal track 2, and the other end is slidably connected to the suspension assembly 4. A bracket 5 is installed at the bottom of the suspension assembly 4, and the jack 6 is installed on the bracket 5, allowing the jack 6 to move laterally or longitudinally in the horizontal plane. Simultaneously, it enters the target tensioning slot for tensioning operations via lifting and lowering, avoiding the need for construction personnel to push and pull the jack 6 suspended below the bridge deck, thus improving the safety of negative moment tensioning operations and increasing the positioning efficiency of the jack 6.

[0023] In some possible implementations, the mobile trolley 1 includes: a plurality of angle steels 11, which are connected end to end in sequence to form a square frame; a plurality of casters 12, which are installed at the bottom of the square frame; wherein the vertical support structure is fixedly connected to one side of the square frame, and the balance block 14 is detachably connected to the other side of the square frame.

[0024] In this application, the mobile trolley 1 includes several angle steels 11 and several casters 12. The angle steels 11 are connected end to end to form a square frame to ensure the stability and load-bearing capacity of the mobile trolley 1. The casters 12 are installed at the bottom of the square frame, so that the mobile trolley 1 can move easily on the bridge deck, improving construction efficiency. At the same time, a vertical support structure is fixed on one side of the square frame to connect the jack 6. A balance block 14 is installed on the other side of the square frame. The balance block 14 can effectively balance the torque, ensuring that the mobile trolley 1 does not overturn during construction, and also ensuring the safety of personnel and equipment.

[0025] In some possible implementations, the vertical support structure includes a plurality of thin-walled round steel columns 13, which are vertically fixed to the square frame; the top of the thin-walled round steel columns 13 is provided with a longitudinal track 2.

[0026] Specifically, the vertical support structure includes several thin-walled round steel columns 13, which are vertically fixed to the square frame. While providing support for the jack 6, they also provide a suspended space for the jack 6. In a specific embodiment, four thin-walled round steel columns 13 are vertically fixed to the square frame, and the four thin-walled round steel columns 13 together form a cuboid.

[0027] In some possible implementations, the lowering trolley further includes a first movable pulley 7, the fixed end of which is fixedly connected to the transverse track 3, and the sliding end of which is snapped against both sides of the web of the longitudinal track 2 and slides along the length of the longitudinal track 2.

[0028] In this application, the lowering trolley also includes a first movable pulley 7. The fixed end of the first movable pulley 7 is fixed on the transverse rail 3, and the sliding end is a pulley structure that abuts against both sides of the web of the longitudinal rail 2 by means of a reverse snap-fit ​​connection, so that the first movable pulley 7 slides in the length direction of the longitudinal rail 2. This not only reduces the frictional resistance of movement, but also prevents the first movable pulley 7 from falling off the longitudinal rail 2. In a specific embodiment, if it contains four thin-walled round steel columns 13, two longitudinal rails 2 can be set. Both longitudinal rails 2 are I-beams. The two longitudinal rails 2 are two parallel sides of a cuboid formed by the four thin-walled round steel columns 13, and two first movable pulleys 7 are set. One first movable pulley 7 is installed on each longitudinal rail 2, and then both first movable pulleys 7 are fixed on the transverse rail 3.

[0029] In some possible implementations, the lowering trolley further includes a second movable pulley 8, the fixed end of which is fixedly connected to the hanging assembly 4, and the sliding end of which is engaged with the flange plate of the transverse track 3 and slides along the length of the transverse track 3.

[0030] In this application, the lowering trolley also includes a second movable pulley 8. The fixed end of the second movable pulley 8 is fixed to the hanging assembly 4, and the sliding end of the second movable pulley 8 is engaged with the flange plate of the transverse track 3 and can move along the length direction of the transverse track 3. The jack 6 can move flexibly in the horizontal or vertical direction on the horizontal plane through the first movable pulley 7 and the second movable pulley 8.

[0031] In some possible implementations, a turntable 9 is installed between the second movable pulley 8 and the hanging assembly 4, the rotating shaft of the turntable 9 is connected to the fixed end of the second movable pulley 8, and the turntable 9 is fixedly connected to the hanging assembly 4.

[0032] Furthermore, a turntable 9 is installed between the second movable pulley 8 and the hanging assembly 4. The rotating shaft of the turntable 9 is connected to the fixed end of the second movable pulley 8, so that the turntable 9 can rotate 360° around the second movable pulley 8, thereby driving the hanging assembly 4 to rotate and realize the direction adjustment of the jack 6 to align with the tensioning slot opening.

[0033] In some possible implementations, the hanging assembly 4 includes: a vertical track 41, the top end of which is fixedly connected to the turntable 9; a hand chain hoist 42, the body of which is detachably connected to the turntable 9; an upper and lower reversing box 43, which is slidably connected to the vertical track 41; the upper and lower reversing box 43 is fixedly connected to the bracket 5; wherein the chain of the hand chain hoist 42 is connected to the upper and lower reversing box 43.

[0034] Specifically, the suspension assembly 4 includes a vertical rail 41, a hand-operated hoist 42, and an upper and lower reversing box 43. The top of the vertical rail 41 is fixedly connected to a turntable 9, and the orientation of the vertical rail 41 can be adjusted via the turntable 9. The body of the hand-operated hoist 42 is detachably connected to the turntable 9, and the chain of the hand-operated hoist 42 is connected to the upper and lower reversing box 43. The hand-operated hoist 42 drives the upper and lower reversing box 43 to slide on the vertical rail 41, thereby driving the support 5 and the jack 6 to rise and fall to reach the target tensioning slot, greatly saving the physical strength of construction workers and improving construction efficiency. In addition, the hand-operated hoist 42 can achieve stable and controllable vertical lifting and lowering of the jack 6, ensuring the stability and safety of the jack 6 placement process.

[0035] In some possible implementations, the bracket 5 is an "L"-shaped bracket 5, the vertical arm of the "L"-shaped bracket 5 is fixedly connected to the upper and lower reversing box 43, and the horizontal arm of the "L"-shaped bracket 5 is used to install the jack 6.

[0036] In some possible implementations, the horizontal arm of the "L"-shaped bracket 5 is provided with mounting holes for fixing the jack 6.

[0037] In this application, the bracket 5 for fixing the jack 6 is an "L"-shaped bracket 5. By fixing the vertical arm of the "L"-shaped bracket 5 to the upper and lower reversing boxes 43, the lifting force is transmitted. Fixing the jack 6 on the horizontal arm helps to fit the jack 6 more closely to the web of the precast T-beam, improving the positioning rate of the jack 6. In addition, the jack 6 can be fixed to the horizontal arm at the mounting hole with high-strength bolts to prevent the jack 6 from loosening during construction and reduce construction risks.

[0038] In some possible implementations, each of the casters 12 is equipped with a brake.

[0039] Specifically, each caster wheel 12 is equipped with a brake, which can be used to control the movement or stop of the mobile trolley 1. In this application, it is preferred to provide four caster wheels 12, which are located at the four right corners of the square frame.

[0040] The working principle of this utility model: This utility model provides a precast T-beam negative bending moment jack 6 lowering trolley. In specific use, the trolley is first moved to the tensioning position by the universal wheels 12. Then, the positions of the first moving pulley 7 on the longitudinal track 2 and the second moving pulley 8 on the transverse track 3 are adjusted so that the jack 6 is near the tensioning slot. Next, the orientation of the vertical track 41 is adjusted by the turntable 9, and the jack 6 is lifted from the ground to the tensioning slot by the hand-operated hoist 42 to perform the negative bending moment tensioning operation. After the tensioning operation is completed, the jack 6 is retrieved and moved to the next work position for operation.

[0041] In summary, compared with the prior art, this utility model has the following advantages: (1) This utility model can achieve precise positioning of the jack through the connection between the longitudinal track, the transverse track and the vertical track, and the positioning process is stable, safe and controllable.

[0042] (2) By installing universal wheels, this utility model is suitable for different bridge road conditions and can easily transport jacks on the bridge, thus improving construction efficiency.

[0043] (3) This utility model eliminates the traditional operation of construction workers directly holding the jack. This utility model saves time and effort, will not cause excessive fatigue to construction workers, and also reduces the risk of falling during the installation of the jack to a certain extent, ensuring the safety of personnel during the construction process. It is suitable for promotion and use.

[0044] Finally, it should be noted that the above embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. All should be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

[0045] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A precast T-beam negative bending moment jack lowering trolley, characterized in that, The lowering trolley includes: A mobile trolley, with a vertical support structure installed on one side and a counterweight installed on the other side; A longitudinal track, which is fixed to the top of the vertical support structure; A transverse track, one end of which is slidably connected to the longitudinal track; A suspension assembly, the top end of which is slidably connected to the other end of the transverse track, and a bracket is provided at the bottom end of the suspension assembly for use as a jack; The suspension assembly, under the action of the longitudinal and transverse rails, drives the support to move in space, thereby realizing the lifting and lowering of the jack.

2. The precast T-beam negative bending moment jack lowering trolley as described in claim 1, characterized in that, The mobile trolley includes: A number of angle steels are connected end to end to form a square frame; Several casters are mounted on the bottom of the square frame; The vertical support structure is fixedly connected to one side of the square frame, and the balance block is detachably connected to the other side of the square frame.

3. The precast T-beam negative bending moment jack lowering trolley as described in claim 2, characterized in that, The vertical support structure includes several thin-walled round steel columns, which are vertically fixed to the square frame; the top of each thin-walled round steel column is provided with a longitudinal track.

4. The precast T-beam negative bending moment jack lowering trolley as described in claim 3, characterized in that, The lowering trolley also includes a first movable pulley, the fixed end of which is fixedly connected to the transverse track, and the sliding end of which is snapped against both sides of the web of the longitudinal track and slides along the length of the longitudinal track.

5. The precast T-beam negative bending moment jack lowering trolley as described in claim 4, characterized in that, The lowering trolley also includes a second movable pulley. The fixed end of the second movable pulley is fixedly connected to the hanging assembly, and the sliding end of the second movable pulley is engaged with the flange plate of the transverse track and slides along the length direction of the transverse track.

6. The precast T-beam negative bending moment jack lowering trolley as described in claim 5, characterized in that... A turntable is installed between the second movable pulley and the hanging assembly. The rotating shaft of the turntable is connected to the fixed end of the second movable pulley, and the turntable is fixedly connected to the hanging assembly.

7. The precast T-beam negative bending moment jack lowering trolley as described in claim 6, characterized in that, The suspension assembly includes: A vertical track, the top of which is fixedly connected to the turntable; A hand chain hoist, wherein the body of the hand chain hoist is detachably connected to the turntable; The upper and lower reversing box is slidably connected to the vertical track; the upper and lower reversing box is fixedly connected to the bracket. The chain of the hand-operated hoist is connected to the upper and lower reversing box.

8. The precast T-beam negative bending moment jack lowering trolley as described in claim 7, characterized in that, The bracket is an "L"-shaped bracket, the vertical arm of the "L"-shaped bracket is fixedly connected to the upper and lower reversing boxes, and the horizontal arm of the "L"-shaped bracket is used to install jacks.

9. The precast T-beam negative bending moment jack lowering trolley as described in claim 8, characterized in that... The horizontal arm of the "L"-shaped bracket is provided with mounting holes for fixing the jack.

10. The precast T-beam negative bending moment jack lowering trolley as described in claim 9, characterized in that, Each of the casters is equipped with a brake.

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