A precast concrete box girder beam pad installation device

Abstract

This utility model relates to the field of precast concrete box girders, and more particularly to a precast concrete box girder pad installation device. A steel plate is fixedly mounted on the top of the lifting device. Movable frames are movably mounted on both sides of the steel plate via screw rods, and clamping plates are installed on each movable frame. Friction components are fixedly sleeved on each screw rod. An arc-shaped component is vertically movably mounted above the friction components at the bottom of the steel plate, and the arc-shaped component and the friction components are mutually frictionally locked. In this utility model, the movable frames and clamping plates driven by the screw rods can clamp and position the beam pad from both sides to prevent the beam pad from shifting during installation. The frictional locking mechanism between the vertically movable arc-shaped component and the friction components on the screw rods allows for easy release of the lock for adjustment. After release, the arc-shaped component's own weight enables frictional locking, enhancing the screw rod's self-locking and anti-rotation capabilities, ensuring the stability of the clamping and positioning, and facilitating user operation and beam pad installation.

Description

Technical Field

[0001] This utility model relates to the field of precast concrete box girder technology, and in particular to a precast concrete box girder beam pad installation device. Background Technology

[0002] Precast concrete box girders are widely used in modern bridge construction due to their advantages such as high quality from factory production and fast construction speed. During the erection of box girders, they must first be accurately placed on the permanent supports at the top of the piers. To ensure that the supports are evenly stressed, accurately positioned, and completely in contact with the bottom of the girder, a reinforced concrete or high-strength mortar pad, known as a girder pad, is usually placed between the support and the bottom of the girder.

[0003] The "Precast Concrete Box Girder Pad Installation Device" disclosed in the authorization announcement number "CN 205893921 U" provides a method for installing the beam pad. However, during the implementation process, it was found that no positioning mechanism was set on its steel plate, making it impossible to position the beam pad during installation, which is inconvenient for users. Therefore, there is an urgent need for a precast concrete box girder pad installation device that facilitates the positioning of the beam pad. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a precast concrete box girder beam pad installation device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A precast concrete box girder pad installation device includes a lifting device. A steel plate is fixedly installed on the top of the lifting device. Movable frames are movably installed on both sides of the steel plate via screw rods, and clamps are installed on the movable frames. Friction components are fixedly sleeved on the screw rods. An arc-shaped component is vertically movably installed on the bottom of the steel plate above the friction component, and the arc-shaped component and the friction component are mutually rubbed and locked together.

[0007] In addition, a preferred structure is that multiple fixing plates are fixedly installed on both sides of the bottom of the steel plate, and multiple second guide columns are fixedly installed between the fixing plates on each side.

[0008] Furthermore, in a preferred configuration, a lead screw is rotatably mounted on the fixed plate, and a knob is mounted on one end of the lead screw.

[0009] Furthermore, in a preferred configuration, the movable frame is guided to move by a second guide post, and the movable frame is driven to move by a lead screw.

[0010] In addition, in a preferred structure, the bottom of the steel plate is provided with a groove above the friction element, and multiple first guide posts are installed downward in the groove. The arc-shaped part is provided with through holes corresponding to the first guide posts, and the bottom of each first guide post is provided with an anti-dropping component.

[0011] Furthermore, in a preferred configuration, the friction element is adapted to the arc-shaped element, and the contact surfaces between the friction element and the arc-shaped element are both configured as rough, non-slip surfaces.

[0012] The beneficial effects of this utility model are as follows: the movable frame and clamping plate driven by the lead screw can clamp and position the beam pad from both sides to prevent the beam pad from shifting during installation. Through the friction locking mechanism between the vertically movable arc-shaped part and the friction part on the lead screw, the locking can be easily released for adjustment. After being released, the friction locking can be achieved by the weight of the arc-shaped part itself, thereby enhancing the lead screw's self-locking and anti-rotation capability, ensuring the stability of clamping and positioning, and facilitating user operation and beam pad installation. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of a precast concrete box girder beam pad installation device proposed in this utility model;

[0014] Figure 2 This is a bottom view of the steel plate structure proposed in this utility model;

[0015] Figure 3 This is a schematic diagram of the structure between the movable frame, the lead screw, and the friction component proposed in this utility model.

[0016] Figure 4 This is a schematic diagram of the exploded structure between the lead screw and the friction component proposed in this utility model.

[0017] In the diagram: 1 Lifting device, 2 Steel plate, 21 Fixing plate, 22 Groove, 221 First guide post, 222 Anti-fall-off component, 23 Arc-shaped component, 231 Through hole, 24 Second guide post, 3 Movable frame, 31 Clamping plate, 4 Lead screw, 41 Knob, 42 Friction component. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figure 1-4A precast concrete box girder pad installation device includes a lifting device 1. A steel plate 2 is fixedly mounted on the top of the lifting device 1. Movable frames 3 are movably mounted on both sides of the steel plate 2 via screw rods 4, and clamping plates 31 are installed on each movable frame 3. Friction components 42 are fixedly sleeved on each screw rod 4. An arc-shaped component 23 is vertically movably mounted on the bottom of the steel plate 2 above the friction component 42, and the arc-shaped component 23 and the friction component 42 are mutually rubbed and locked together.

[0020] Multiple fixing plates 21 are fixedly installed on both sides of the bottom of the steel plate 2, and multiple second guide columns 24 are fixedly installed between the fixing plates 21 on each side. The installation of the second guide columns 24 can improve the stability of the movable frame 3 during movement.

[0021] A lead screw 4 is rotatably mounted on the fixed plate 21, and a knob 41 is installed at one end of the lead screw 4. The movable frame 3 has a threaded hole adapted to the lead screw 4; rotation of the lead screw 4 can move the movable frame 3. A threaded self-locking structure is provided between the movable frame 3 and the lead screw 4; these are existing technologies and will not be described in detail.

[0022] The movable frame 3 is guided to move by the second guide post 24, and the movable frame 3 is driven to move by the lead screw 4.

[0023] The bottom of the steel plate 2, above the friction element 42, has a groove 22. Multiple first guide posts 221 are installed downwards within the groove 22. The arc-shaped component 23 has through holes 231 corresponding to the first guide posts 221, and each of the first guide posts 221 has an anti-detachment component 222 installed at its bottom. The arc-shaped component 23 moves guided by the first guide posts 221, and the diameter of the anti-detachment component 222 is larger than the diameter of the through hole 231, thus preventing the arc-shaped component 23 from detaching from the first guide posts 221.

[0024] The friction element 42 is adapted to the arc-shaped element 23, and the contact surfaces between the friction element 42 and the arc-shaped element 23 are both set as rough anti-slip surfaces.

[0025] In this embodiment, the technical solution is based on the technical solution disclosed in the prior art document. The basic implementation method can be referred to the prior art document, so it will not be described in detail in this embodiment.

[0026] When it is necessary to position and clamp the beam pad, simply lift the arc-shaped part 23 upwards to release the friction lock caused by the arc-shaped part 23 on the friction part 42. Then, simply turn the knob 41 to drive the lead screw 4 to rotate, which in turn drives the movable frame 3 and the clamping plate 31 to move synchronously, thereby achieving fixed clamping of the beam pad through the clamping plates 31 on both sides.

[0027] After the user has adjusted the positions of the movable frame 3 and the clamping plate 31, simply loosen the arc-shaped component 23. The arc-shaped component 23 will then automatically fall under gravity, thus re-locking the friction component 42 through friction. This method further increases the damping force required for the rotation of the lead screw 4, further preventing its self-rotation and improving the clamping and positioning effect on the beam pad. Positioning the beam pad prevents displacement during installation with the precast concrete box girder, improving the user's experience during installation.

[0028] It is worth noting that the arc-shaped component 23 has a large weight, which can further improve the damping effect of the arc-shaped component 23 on the friction component 42, so as to ensure the stability of positioning.

[0029] In this invention, the movable frame 3 driven by the lead screw 4 and the clamping plate 31 can clamp and position the beam pad from both sides to prevent the beam pad from shifting during installation. Through the friction locking mechanism between the vertically movable arc-shaped part 23 and the friction part 42 on the lead screw 4, the locking can be easily released for adjustment. After being released, the arc-shaped part 23 can achieve friction locking by its own weight, thereby enhancing the lead screw's self-locking and anti-rotation capability, ensuring the stability of clamping and positioning, and facilitating user operation and beam pad installation.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A precast concrete box girder beam pad installation device, comprising a lifting device (1), wherein a steel plate (2) is fixedly disposed on the top of the lifting device (1), characterized in that, Both sides of the steel plate (2) are equipped with movable frames (3) via screw rods (4), and clamps (31) are installed on the movable frames (3). Friction components (42) are fixedly sleeved on each of the lead screws (4). A curved component (23) is vertically and movably arranged above the friction component (42) on the bottom of the steel plate (2). The curved component (23) and the friction component (42) rub against each other and lock together.

2. The precast concrete box girder beam pad installation device according to claim 1, characterized in that, Multiple fixing plates (21) are fixedly installed on both sides of the bottom of the steel plate (2), and multiple second guide columns (24) are fixedly installed between the fixing plates (21) on each side.

3. The precast concrete box girder beam pad installation device according to claim 2, characterized in that, A lead screw (4) is rotatably mounted on the fixed plate (21), and a knob (41) is mounted on one end of the lead screw (4).

4. The precast concrete box girder beam pad installation device according to claim 3, characterized in that, The movable frame (3) is guided to move by the second guide column (24) and driven to move by the lead screw (4).

5. The precast concrete box girder beam pad installation device according to claim 1, characterized in that, The bottom of the steel plate (2) is provided with a groove (22) above the friction member (42). Multiple first guide posts (221) are installed downward in the groove (22). The arc-shaped member (23) is provided with through holes (231) corresponding to the first guide posts (221), and anti-dropping members (222) are installed at the bottom of the first guide posts (221).

6. The precast concrete box girder beam pad installation device according to claim 1, characterized in that, The friction element (42) is adapted to the arc-shaped element (23), and the contact surfaces between the friction element (42) and the arc-shaped element (23) are both set as rough anti-slip surfaces.

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