Steel formwork expansion device

Abstract

A steel formwork telescopic device comprises a connecting support, connecting rods are hinged to the two sides of the connecting support, the connecting rods are hinged to side formworks, and the side formworks are hinged to side formwork pulling plates; the side mold pulling plate is connected with the side mold screw rod, the side mold screw rod penetrates through the thread sleeve bracket and is in threaded fit with the thread sleeve bracket, and the thread sleeve bracket is mounted on the connecting bracket; a supporting shaft is mounted in the middle of the connecting support and connected with a screw, and the screw is in threaded fit with the mounting support. The device is fixed on a creeping formwork tank car and climbs along with the creeping formwork tank car, the steel formwork stretches out to be supported and contracts inwards to be demolded after concrete is formed at a door groove, repeated mounting and dismounting of the steel formwork are avoided, the positioning accuracy of the formwork is improved, the construction difficulty is reduced, and the engineering quality is improved.

Description

Technical Field

[0001] This utility model belongs to the field of concrete formwork expansion joints, and specifically relates to a steel formwork expansion joint. Background Technology

[0002] Controlling the dimensions and appearance of cast concrete is inseparable from the use of steel formwork. In water conservancy and hydropower projects, the concrete in the gate slot area is a vertical, straight groove with small dimensions and limited construction space. The construction process includes installing formwork supports, installing formwork, pouring concrete, curing, and removing formwork. During the repeated use and removal of steel formwork, deformation occurs, positioning becomes difficult, and operations are cumbersome, leading to problems such as dimensional deviations or cracking in the cast concrete. In addition, the harsh and limited construction environment makes it impossible to guarantee the stability of the steel formwork and the safety of workers. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a steel formwork expansion device. This device is fixed on the climbing formwork trolley and rises with it. Before the concrete is poured at the gate slot, the steel formwork extends out for support. After the concrete is formed, it retracts inward to demold, avoiding repeated installation and removal of the steel formwork, improving the positioning accuracy of the formwork, reducing the construction difficulty, and improving the quality of the project.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A steel formwork expansion device includes a connecting bracket, with connecting rods hinged to both sides of the connecting bracket, the connecting rods being hinged to the side formwork, and the side formwork being hinged to the side formwork pull plate;

[0006] The side mold pull plate is connected to the side mold screw, the side mold screw passes through the screw sleeve bracket and is threaded into the screw sleeve bracket, and the screw sleeve bracket is installed on the connecting bracket;

[0007] A support shaft is installed in the middle of the connecting bracket. The support shaft is connected to a screw rod, and the screw rod is threaded into the mounting bracket.

[0008] Preferably, the shape of the side formwork is adapted to the reinforcing plate of the steel formwork, and the side formwork is used to slide along the reinforcing plate of the steel formwork.

[0009] Preferably, the connecting bracket is connected to the steel formwork.

[0010] Preferably, the connecting bracket consists of two parallel plates, and the connecting bracket is hinged to the connecting rod.

[0011] Preferably, there are four connecting rods, with two connecting rods hinged to each side of the connecting bracket.

[0012] Preferably, a nut is provided in the middle of the mounting bracket, and the nut is threadedly engaged with the screw.

[0013] Preferably, the mounting bracket and the support shaft are in sliding fit.

[0014] The present invention can achieve the following beneficial effects:

[0015] 1. This utility model solves the problems of repeated disassembly and assembly of steel formwork and insufficient positioning accuracy during the concrete pouring process of door slot. The steel formwork telescopic operation of this device is simple, the structure is reliable, and it is suitable for concrete construction of various shapes.

[0016] 2. The common process of dismantling steel formwork involves manual hoisting or forced removal, which can cause cracks or appearance problems in the concrete. This invention makes the demolding process smooth and reliable.

[0017] 3. Due to limited construction conditions for pouring concrete in the door slot, the steel formwork is prone to deformation and lacks stability during repeated disassembly and assembly. This invention greatly simplifies the disassembly and assembly process of the steel formwork, making it easy for workers to operate.

[0018] 4. Improved construction accuracy and simplified process. This invention only needs to be positioned and installed once before construction and can be used continuously without the need to repeatedly position the steel formwork.

[0019] 5. This invention is also applicable to the molding of other concrete structures, such as large-area planes or irregularly shaped arcs and triangles, which can achieve the effect of repeated use after one positioning. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 This is a partial three-dimensional structural diagram of the present invention. Figure 1 ;

[0022] Figure 2 This is a top view of the present invention;

[0023] Figure 3 This is a partial three-dimensional structural diagram of the present invention. Figure 2 ;

[0024] Figure 4 This is a structural diagram of the present invention;

[0025] Figure 5 This is a schematic diagram of two working states of this utility model.

[0026] In the diagram: 1-Support shaft, 2-Screw rod, 3-Nut, 4-Mounting bracket, 5-Screw sleeve bracket, 6-Side mold screw rod, 7-Side mold tie rod, 8-Side template, 9-Connecting rod, 10-Connecting bracket, 11-Steel template, 12-Reinforcing plate. Detailed Implementation

[0027] The application scenario for this device is as follows: The entire steel formwork is supported by two mechanisms, each symmetrically arranged along the support axis. The extension and retraction of the steel formwork are achieved by operating the screws on the sleeves. The portal steel formwork consists of two side formworks and one flat formwork. The two side formworks are symmetrically arranged, and all three formworks are controlled by the screws on the support axis to move closer or further away as a whole. The flat formwork and the support are relatively fixed, while the side formworks are connected to the support by connecting rods, forming a planar four-bar linkage. Adjusting the side formwork screws controls the retraction of the side formworks. Using the center of the opening and the center of the portal slot as references, the device is positioned and fixed onto the climbing formwork truck at the bottom of the portal slot. Before concrete pouring, the screw mechanism on the support axis is operated to bring the entire device close to the concrete surface reference. After the flat formwork is in place, the side formwork screws are adjusted to bring the side formwork into position. Before pouring, a release agent is applied to the formwork surface to reduce the adhesion between the concrete and the formwork, followed by concrete pouring. After the concrete has cured and matured, the side formwork screws are operated first to retract the side formworks, and then the screws on the support axis are operated to remove the entire device from the portal slot. After further cleaning the template surface, the device rises with the door groove climbing mechanism, thus completing one cycle.

[0028] The specific structure of this device is as follows: Figures 1 to 5 As shown, a steel formwork telescopic device includes a connecting bracket 10, with connecting rods 9 hinged to both sides of the connecting bracket 10. The connecting rods 9 are hinged to the side formwork 8, and the side formwork 8 is hinged to the side formwork pull plate 7. The side formwork pull plate 7 is connected to the side formwork screw 6, and the side formwork screw 6 passes through the screw sleeve bracket 5 and is threadedly engaged with the screw sleeve bracket 5. The screw sleeve bracket 5 is installed on the connecting bracket 10. A support shaft 1 is installed in the middle of the connecting bracket 10, and the support shaft 1 is connected to the screw 2. The screw 2 is threadedly engaged with the mounting bracket 4.

[0029] The shape of the side formwork 8 is adapted to the reinforcing plate 12 of the steel formwork 11, and the side formwork 8 is used to slide along the reinforcing plate of the steel formwork.

[0030] The connecting bracket 10 is connected to the steel formwork 11. The connecting bracket 10 consists of two parallel plates, and the connecting bracket 10 is hinged to the connecting rod 9.

[0031] There are four connecting rods 9, with two connecting rods 9 hinged to each side of the connecting bracket 10. A nut 3 is located in the middle of the mounting bracket 4, and the nut 3 is threaded into the screw 2. The mounting bracket 4 is slidably fitted with the support shaft 1.

[0032] The working principle of this device is as follows:

[0033] The implementation of this device involves adjusting the screws before pouring to extend the side formwork and the flat formwork into place. After the concrete is formed, the formwork retracts inward to allow it to continue to rise, and this process is repeated.

[0034] When it is necessary to support the unformed concrete fluid, the sleeve is manually used to turn the screw 2. The support shaft 1 and the connecting bracket 10 are threaded, so that the whole device moves closer to the groove until the steel formwork 11 reaches the reference. The side formwork screw 6 passes through the screw sleeve bracket 5 and is threadedly engaged with the screw sleeve bracket 5. The side formwork 8 is hinged to the connecting rod 9 to allow rotation in the plane. The side formwork 7 is fixedly connected to the connecting rod 9. The sleeve is used to adjust the side formwork screw 6 so that the side formwork 8 is flush with the steel formwork 11 under the movement trajectory of the four-bar linkage formed by the connecting rod 9. The other side formwork screw is adjusted with the center of the groove as the reference. The screw 2 and the two side formwork screws 6 are checked, measured and fine-tuned. A release agent is applied before pouring concrete.

[0035] When the concrete has set and demolding is required, first adjust the side formwork screw 7. Similarly, during the movement of the four-bar linkage of connecting rod 9, the side formwork 8 stops moving due to the limiting position of the steel formwork reinforcement plate. The same applies to the other side formwork. At this point, the side formwork is demolded first. Then, adjust screw 2, and the connecting bracket 10 drives the steel formwork 11 and the two side formwork 8 to exit the doorway as a whole, satisfying the overall climbing conditions. Then, clean the formwork surface to prepare for the next extension.

[0036] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A steel formwork expansion joint, characterized in that: Includes a connecting bracket (10), with connecting rods (9) hinged on both sides of the connecting bracket (10), the connecting rods (9) being hinged to the side template (8), and the side template (8) being hinged to the side mold plate (7); The side mold pull plate (7) is connected to the side mold screw (6). The side mold screw (6) passes through the screw sleeve bracket (5) and is threadedly engaged with the screw sleeve bracket (5). The screw sleeve bracket (5) is fixedly installed on the connecting bracket (10). A support shaft (1) is installed in the middle of the connecting bracket (10). The support shaft (1) is threadedly connected to the screw (2). The screw (2) is welded to the mounting bracket (4) with a nut.

2. The steel formwork expansion joint device according to claim 1, characterized in that: The shape of the side formwork (8) is adapted to the reinforcing plate (12) of the steel formwork (11), and the side formwork (8) is used to slide along the reinforcing plate of the steel formwork.

3. The steel formwork expansion joint device according to claim 2, characterized in that: The connecting bracket (10) is connected to the steel template (11).

4. A steel formwork expansion joint according to claim 3, characterized in that: The connecting bracket (10) consists of two parallel plates, and the connecting bracket (10) is hinged to the connecting rod (9).

5. A steel formwork expansion joint according to claim 4, characterized in that: There are four connecting rods (9), and two connecting rods (9) are hinged to each side of the connecting bracket (10).

6. The steel formwork expansion joint device according to claim 1, characterized in that: The mounting bracket (4) has a nut (3) in the middle, and the nut (3) is threadedly engaged with the screw (2).

7. A steel formwork expansion joint according to claim 6, characterized in that: The mounting bracket (4) and the support shaft (1) slide together.

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