A prefabricated plugging block for a steel hole and a mold

Abstract

A kind of section steel hole prefabricated plugging block and mould belong to the field of construction engineering, it is suitable for the large-scale application of high-rise building standardization construction scene, it is composed of concrete plugging block, steel wire mesh, its characterized in that concrete plugging block is a four prism, steel wire mesh is embedded into concrete plugging block and extends 10cm to the periphery of concrete plugging block.Its manufacturing mould is composed of two open-end rectangular tubes and a bottom plate, the edge of one end of rectangular tube is provided with connecting lug, one end of rectangular tube and bottom plate are connected by connecting lug and bolt connection;Rectangular tube is composed of two n-shaped templates buckled together, the edge of n-shaped template is provided with connecting lug, connecting lug is provided with connecting hole.The utility model improves construction efficiency and safety.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a device and construction method for sealing openings after the dismantling of steel cantilever scaffolding, which is particularly suitable for preventing leakage and structural strength defects caused by pre-reserved openings in cast-in-place concrete structures. Background Technology

[0002] In the construction of cast-in-place concrete structures, the sealing of rectangular openings left after the dismantling of steel cantilever scaffolding has long faced systemic challenges, including inaccurate depth control, shrinkage crack leakage, and high risks associated with working at heights. Traditional methods rely on on-site formwork casting or foam filling, which suffers from significant depth deviations exceeding specifications and high rework rates. Concrete shrinkage stress causes circumferential cracks, posing a significant leakage hazard, especially in freeze-thaw regions, resulting in substantial maintenance costs. Furthermore, high-altitude formwork operations violate safety regulations, posing a significant risk of falling objects. Summary of the Invention

[0003] To address the problems of inaccurate depth control, frequent shrinkage cracks, and high risks associated with high-altitude operations in sealing openings of cantilevered steel scaffolding, this utility model provides a prefabricated sealing block for steel openings and its manufacturing mold.

[0004] A prefabricated steel opening sealing block is composed of a concrete sealing block and a wire mesh. The concrete sealing block is a quadrangular prism, with the wire mesh embedded within it and extending 10cm around the block. The mold for the concrete sealing block consists of two open-ended rectangular tubes and a 200mm x 140mm rectangular base plate. One end of each rectangular tube has a connecting lug, and one end of the rectangular tube is connected to the base plate via a connecting lug and bolts. The rectangular tube is composed of two n-shaped templates interlocked together. The n-shaped templates have connecting lugs with connecting holes on their edges. The horizontal width of the n-shaped template is 200mm, and its vertical height is the same as the wall thickness.

[0005] The working principle of this invention is as follows: Standardized concrete sealing blocks are prefabricated in batches using molds. During production, two n-shaped templates are assembled into a rectangular cylinder using connecting lugs and adjusting bolts, according to the wall thickness, and fixed to a base plate to form a mold of customized size. A wire mesh is placed in the cavity, concrete is poured, and the block is demolded to obtain the prefabricated sealing block. The integrated design of the prefabricated concrete sealing block and the extended wire mesh utilizes the automatic limiting of the wire mesh's bending points to control the installation depth; its horizontal extension section combines with the plaster layer to form a crack-resistant interface, effectively preventing shrinkage cracks and leakage.

[0006] The beneficial effects of this utility model are as follows: This utility model achieves standardized and mass production of sealing blocks through molds. The molds are flexible and adjustable, and can quickly adapt to different wall thicknesses, ensuring product dimensional accuracy and production efficiency. The resulting sealing blocks utilize pre-embedded steel wire mesh to achieve automatic depth limiting, ensuring precise and efficient construction; the extended mesh combines with the plaster layer to form a crack-resistant interface, effectively preventing shrinkage cracks and leakage, and improving structural sealing. Attached Figure Description

[0007] Figure 1 This is a diagram showing the prefabrication status of prefabricated sealing blocks for steel openings.

[0008] Figure 2 This is a structural diagram of the prefabricated sealing block for medium-sized steel openings according to this utility model.

[0009] Figure 3 Structural diagram of the mold for making prefabricated sealing blocks for medium-sized steel openings according to this utility model.

[0010] In the diagram, 1. Wire mesh, 2. Concrete block, 3. Base plate, 4. Mold, 5. Connecting hole, 6. Adjusting bolt, 7. Interface agent layer, 8. Crack-resistant plaster layer. Detailed Implementation

[0011] Figure 2 As shown: A prefabricated steel opening sealing block is composed of a concrete sealing block 2 and a wire mesh 1. The characteristic is that the concrete sealing block 2 is a quadrangular prism, and the wire mesh 1 is pre-embedded in the concrete sealing block and extends 10cm around the concrete sealing block.

[0012] Figure 3 As shown: A mold for making prefabricated sealing blocks for steel openings consists of two rectangular tubes with open ends and a base plate 3. One end of the rectangular tube is provided with a connecting lug 9. One end of the rectangular tube is connected to the base plate 3 through the connecting lug 9 and an adjusting bolt 6. The rectangular tube is composed of two n-shaped templates that are fastened together. The edge of the n-shaped template is provided with a connecting lug, and the connecting lug is provided with a connecting hole 5.

[0013] The concrete sealing block 2 is a C25 fine stone concrete casting body (length × width × thickness = 200 mm × 140 mm × wall thickness mm), with a steel wire mesh embedded throughout its length. The embedded steel wire mesh is pre-folded at 90° at 30 mm from the installation end to form a horizontal extension section (100 mm long).

[0014] The base plate measures 200mm x 140mm, the horizontal width of the n-shaped plate is 200mm, and the vertical height is the same as the wall thickness.

Claims

1. A precast sealing block for steel openings, comprising concrete sealing blocks and wire mesh, characterized in that the concrete... The sealing block is a quadrangular prism, with wire mesh pre-embedded inside the concrete sealing block and extending 10cm around it. The mold for the concrete sealing block consists of two rectangular tubes with open ends and a 200mm×140mm rectangular base plate. One end of the rectangular tube has a connecting lug, and one end of the rectangular tube is connected to the base plate via the connecting lug and bolts. The rectangular tube is composed of two n-shaped templates that are fastened together. The n-shaped templates have connecting lugs on their edges, and the connecting lugs have connecting holes. The horizontal width of the n-shaped template is 200mm, and its vertical height is the same as the wall thickness.

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