Combined type movable box girder formwork

Abstract

The utility model provides a combined type movable box girder formwork which comprises a bridge pier, a movable box girder formwork body is installed at the upper end of the bridge pier, a set of hydraulic abutting foot columns located above the bridge pier are arranged at the lower end of the movable box girder formwork body, and the upper end of the bridge pier is fixedly connected with a contact top plate. The lower end of the movable box girder formwork body is fixedly connected with a set of bearing stand column rods located between the two hydraulic abutting foot columns, a telescopic inner rod is fixedly connected between the two bearing stand column rods, the outer end of the telescopic inner rod is sleeved with an elastic connecting piece, and a built-in motor driving box drives sweeping vertical strips to rotate to clean and make contact with impurities on the surface of a top plate. Meanwhile, an airflow pipeline below an auxiliary inner cavity is linked with a pump machine in a sweeping vertical strip to blow away impurities, so that uneven stress on the contact surface of the hydraulic abutting foot column and the pier caused by impurity accumulation is effectively avoided, the contact position of the hydraulic abutting foot column and the pier is flat and stable, and the stability of the formwork in the construction process is improved; and potential safety hazards and construction errors caused by unstable contact are reduced.

Description

Technical Field

[0001] This utility model relates to a composite mobile box girder formwork, belonging to the field of engineering construction technology. Background Technology

[0002] In the field of modern bridge construction, box girders, as key load-bearing structures, directly affect the overall performance and construction period of bridges through their construction quality and efficiency. Moving box girder formwork, as the core equipment for box girder construction, plays a decisive role in the safety, accuracy, and progress of the construction process.

[0003] A trolley for installing the outer formwork of the vertical wall of a concrete box girder, Chinese Patent No. CN215482403U, belongs to the field of bridge construction technology. This trolley features a truss beam at the top of the concrete box girder, with the length of the truss beam exceeding the width of the box girder. Suspended baskets are suspended at both ends of the truss beam. The suspended baskets provide a working platform for construction workers, allowing them to install and dismantle the outer vertical wall formwork of the concrete box girder within the baskets, thus improving the safety of working at heights near edges.

[0004] In traditional mobile box girder formwork construction, the lack of an effective cleaning mechanism at the contact area between the pier and the formwork legs makes it difficult to completely remove impurities such as loose dust and gravel from the top of the pier, resulting in uneven stress on the contact surface between the formwork legs and the pier. This not only affects the stability of the formwork and increases safety risks, but may also cause displacement and deformation during the box girder pouring process.

[0005] To address this, a composite movable box girder formwork is proposed. Summary of the Invention

[0006] In view of this, the present invention provides a composite movable box girder formwork to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial option.

[0007] The technical solution of this utility model is implemented as follows: A composite mobile box girder formwork includes a pier, a mobile box girder formwork body is installed on the upper end of the pier, a set of hydraulic abutment columns located above the pier is provided at the lower end of the mobile box girder formwork body, a contact top plate is fixedly connected to the upper end of the pier, a set of load-bearing columns located between two hydraulic abutment columns is fixedly connected to the lower end of the mobile box girder formwork body, a telescopic inner rod is fixedly connected between the two load-bearing columns, an elastic connector is sleeved on the outer end of the telescopic inner rod, an internal motor drive box is fixedly connected to the lower end of the load-bearing columns, an X-shaped rotating plate is installed at the lower end of the internal motor drive box, and several brush vertical bars are fixedly connected to the lower end of the X-shaped rotating plate.

[0008] More preferably, the inner end of the movable box girder formwork is provided with a template cavity, and the inner end of the built-in motor drive box is fixedly connected with an auxiliary cavity.

[0009] More preferably, a pump is installed at the inner end of the auxiliary cavity, and a pair of airflow pipes are provided at the output end of the pump.

[0010] More preferably, the two airflow pipes are located on both sides of the X-shaped rotating plate, and the brush strips are in contact with the upper ends of the hydraulically abutting foot posts.

[0011] More preferably, the lower end of the hydraulic abutment foot is fixedly connected to a stabilizing bottom ring, and the stabilizing bottom ring and the contact top plate are in contact with each other.

[0012] More preferably, the lower end of the hydraulic abutment foot is fixedly connected to a reinforcing bottom ring block, and the inner end of the reinforcing bottom ring block has an internal cavity.

[0013] More preferably, a plurality of triangular stabilizing support blocks are fixedly connected between the upper and lower inner walls of the internal cavity, and the plurality of triangular stabilizing support blocks are arranged in a ring at equal intervals.

[0014] The present invention has the following advantages due to the adoption of the above technical solution:

[0015] I. This utility model uses a built-in motor drive box to drive the vertical brush strips to rotate and clean impurities on the surface of the contact plate. At the same time, the airflow pipe below the auxiliary cavity works in conjunction with the pump inside the brush strips to blow away impurities. This effectively avoids uneven force on the contact surface between the hydraulic abutment column and the pier due to the accumulation of impurities, ensuring that the contact position between the two is flat and stable. This improves the stability of the formwork during construction and reduces safety hazards and construction errors caused by unstable contact.

[0016] Second, this utility model achieves a large-area contact between the stable bottom ring and the contact top plate, which evenly distributes various loads such as the self-weight and dynamic load of the formwork to the bridge pier. The triangular stabilizing support block inside the reinforced bottom ring provides internal support and reinforcement for the hydraulically abutting columns. The two work together from the two dimensions of bottom bearing and internal support, which greatly improves the overall stability of the formwork under complex construction conditions, ensures the safe and reliable operation of the formwork, and extends the service life of the formwork.

[0017] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

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

[0019] Figure 1 This is a schematic diagram of the axial structure of the movable box girder formwork of this utility model;

[0020] Figure 2 This is a schematic diagram of the lifting state structure of the mobile box girder formwork of this utility model;

[0021] Figure 3 This is a schematic diagram of the elastic connector structure of this utility model;

[0022] Figure 4 For the present utility model Figure 3 Enlarged schematic diagram of a partial section of the formwork for the China Mobile box girder;

[0023] Figure 5 This is a schematic diagram of the reinforced bottom ring block structure of this utility model;

[0024] Figure 6 This is a partially truncated enlarged structural diagram of the reinforced bottom ring block structure of this utility model.

[0025] Reference numerals: 1. Movable box girder formwork; 2. Pier; 3. Hydraulic abutment column; 4. Stabilizing bottom ring; 5. Built-in motor drive box; 6. X-shaped rotating plate; 8. Auxiliary inner cavity; 9. Sweeping vertical bar; 11. Telescopic inner rod; 12. Elastic connector; 13. Contact top plate; 14. Formwork inner cavity; 15. Reinforced bottom ring block; 16. Internal opening; 17. Triangular stabilizing support inner block; 18. Load-bearing column rod; 19. Airflow duct. Detailed Implementation

[0026] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0027] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Example 1

[0028] like Figure 1-4As shown, this utility model embodiment provides a composite mobile box girder formwork, including a pier 2. A mobile box girder formwork body 1 is installed on the upper end of the pier 2. A set of hydraulic abutment columns 3 located above the pier 2 is provided at the lower end of the mobile box girder formwork body 1. A contact top plate 13 is fixedly connected to the upper end of the pier 2. A set of load-bearing column rods 18 located between two hydraulic abutment columns 3 is fixedly connected to the lower end of the mobile box girder formwork body 1. A telescopic inner rod 11 is fixedly connected between the two load-bearing column rods 18. An elastic connector 12 is sleeved on the outer end of the telescopic inner rod 11. An internal motor drive box 5 is fixedly connected to the lower end of the load-bearing column rod 18. An X-shaped rotating plate 6 is installed at the lower end of the internal motor drive box 5. Several brush vertical strips 9 are fixedly connected to the lower end of the X-shaped rotating plate 6.

[0029] The inner end of the movable box girder formwork 1 is provided with a template cavity 14. The inner end of the built-in motor drive box 5 is fixedly connected to an auxiliary cavity 8. A pump is installed in the inner end of the auxiliary cavity 8. The output end of the pump is provided with a pair of airflow pipes 19. The two airflow pipes 19 are located on both sides of the X-shaped rotating plate 6. The brush vertical bar 9 is in contact with the upper end of the hydraulic abutment foot column 3. The lower end of the hydraulic abutment foot column 3 is fixedly connected to a stabilizing bottom ring 4. The stabilizing bottom ring 4 is in contact with the contact top plate 13. Example 2

[0030] like Figure 5-6 As shown, in one embodiment, a reinforcing bottom ring block 15 is fixedly connected to the lower end of the hydraulic abutment foot column 3. An internal cavity 16 is opened at the inner end of the reinforcing bottom ring block 15. Multiple triangular stabilizing support inner blocks 17 are fixedly connected between the upper and lower inner walls of the internal cavity 16. The multiple triangular stabilizing support inner blocks 17 are arranged in a ring at equal intervals.

[0031] By reinforcing the inner cavity 16 at the inner end of the bottom ring block 15, multiple triangular stabilizing support blocks 17 are distributed in a ring shape at equal intervals. With the stability of the triangular structure, they support and reinforce the hydraulically abutting foot column 3 from the inside. The bottom ring 4 and the triangular stabilizing support blocks 17 work together from the two dimensions of bottom bearing and internal support, respectively, to further improve the overall stability of the formwork during construction and ensure that the formwork can operate safely and stably under complex working conditions.

[0032] In operation, when the movable box girder formwork 1 is in a displacement state, the motor in the built-in motor drive box 5 starts running. The motor output shaft transmits rotational power to the X-shaped rotating plate 6 through a coupling, thereby driving the brush vertical bar 9, which is fixedly connected to the X-shaped rotating plate 6, to rotate. During the continuous rotation of the brush vertical bar 9, its bristles rub against the surface of the contact top plate 13 at the upper end of the pier 2, removing the floating dust and impurities accumulated on the surface of the contact top plate 13. At the same time, the airflow pipe 19 set below the auxiliary inner cavity 8 interacts with the airflow pipe 9 inside the brush vertical bar 9. The pump operates in conjunction with the pier. After the pump starts, it changes the air pressure in the pipeline to generate a directional airflow. This airflow acts on the impurities swept down by the vertical brushes 9, blowing them away from the surface of the contact plate 13. This coordinated operation effectively ensures that the contact position between the hydraulic abutment column 3 and the pier 2 remains flat and stable, avoiding uneven stress on the contact surface due to impurity accumulation, which would affect the stability of the formwork during construction. When the hydraulic abutment column 3 drives the moving box girder formwork 1 to be erected on the pier 2, gravity keeps the formwork between the two hydraulic abutment columns 3 in place. The load-bearing column 18 retracts synchronously, effectively avoiding interference with the smooth repositioning of the hydraulic abutment column 3. This ensures that the hydraulic abutment column 3 can accurately abut against the contact top plate 13 on the pier 2 according to the preset path and position, providing a guarantee for the stable construction of the moving box girder formwork 1. The stabilizing bottom ring 4 connected to the lower end of the hydraulic abutment column 3 directly contacts the contact top plate 13 during the formwork operation. Through a large contact area, the stabilizing bottom ring 4 distributes various loads borne by the formwork, including the self-weight of the moving box girder formwork 1 and the construction process. Dynamic loads during the process are evenly distributed to the piers 2, thereby enhancing the overall stability of the formwork. In addition, multiple triangular stabilizing support blocks 17, which are distributed in a ring at equal intervals in the inner cavity 16 of the reinforcing bottom ring block 15, provide support and reinforcement to the hydraulically abutting foot column 3 from the inside by means of the stability of the triangular structure. The stable bottom ring 4 and the triangular stabilizing support blocks 17 work together from the two dimensions of bottom bearing and internal support, respectively, to further improve the overall stability of the formwork during the construction process and ensure that the formwork can operate safely and stably under complex working conditions.

[0033] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A composite movable box girder formwork, comprising piers (2), characterized in that: The upper end of the pier (2) is equipped with a movable box girder formwork (1). The lower end of the movable box girder formwork (1) is provided with a set of hydraulic abutment columns (3) located above the pier (2). The upper end of the pier (2) is fixedly connected with a contact top plate (13). The lower end of the movable box girder formwork (1) is fixedly connected with a set of load-bearing column rods (18) located between two hydraulic abutment columns (3). The two load-bearing column rods (18) are fixedly connected with a telescopic inner rod (11). The outer end of the telescopic inner rod (11) is fitted with an elastic connector (12). The lower end of the load-bearing column rod (18) is fixedly connected with a built-in motor drive box (5). The lower end of the built-in motor drive box (5) is equipped with an X-shaped rotating plate (6). The lower end of the X-shaped rotating plate (6) is fixedly connected with several horizontally equidistant sweeping vertical strips (9).

2. The composite mobile box girder formwork according to claim 1, characterized in that: The inner end of the movable box girder formwork (1) is provided with a template cavity (14), and the inner end of the built-in motor drive box (5) is fixedly connected with an auxiliary cavity (8).

3. The composite movable box girder formwork according to claim 2, characterized in that: A pump is installed at the inner end of the auxiliary cavity (8), and a pair of airflow pipes (19) are provided at the output end of the pump.

4. The composite movable box girder formwork according to claim 3, characterized in that: The two airflow pipes (19) are located on both sides of the X-shaped rotating plate (6), and the brush vertical bar (9) is in contact with the upper end of the hydraulic abutment foot column (3).

5. A composite movable box girder formwork according to claim 1, characterized in that: The lower end of the hydraulic abutment foot (3) is fixedly connected to a stabilizing bottom ring (4), and the stabilizing bottom ring (4) and the contact top plate (13) are in contact with each other.

6. The composite mobile box girder formwork according to claim 1, characterized in that: The lower end of the hydraulic abutment foot (3) is fixedly connected to a reinforcing bottom ring block (15), and the inner end of the reinforcing bottom ring block (15) is provided with an internal cavity (16).

7. A composite movable box girder formwork according to claim 6, characterized in that: Multiple triangular stabilizing support blocks (17) are fixedly connected between the upper and lower inner walls of the internal cavity (16), and the multiple triangular stabilizing support blocks (17) are arranged in a ring at equal intervals.

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