A concrete test block demolding device

Abstract

The utility model belongs to the field of concrete construction, especially relates to a concrete test block stripping device. Including multiple moulds, demoulding auxiliary frame, top block mechanism, manual jacking device, the multiple moulds include a plurality of mould cavities for concrete compression resistance test block forming, each mould cavity bottom is equipped with round opening, the round opening covers gasket plate on, top block mechanism passes through round opening and extends into gasket plate below, the demoulding auxiliary frame sequentially includes the mounting seat connected on the frame body, the supporting longitudinal beam, the limiter from below to above, the manual jacking device upper portion and the mounting plate contact of top block mechanism. The utility model is applicable to concrete laboratory compression resistance test block stripping operation. Have the simple mould, stripping efficiency fast, not easy to damage, single person can operate, low carbon environmental protection, the advantages such as high safety.

Description

Technical Field

[0001] This utility model belongs to the field of concrete construction, and specifically relates to a concrete test block demolding device. Background Technology

[0002] Concrete test blocks are used to determine the compressive strength and other properties of concrete. In my country, cubic molds are commonly used for concrete compressive strength testing, typically 15 cm cubes. Concrete test blocks are an indispensable part of concrete testing, and their results directly affect the quality of civil engineering projects.

[0003] In the preparation of concrete test blocks, the separation of the test block from the mold is a crucial step. Traditional demolding methods, such as using a demolding air gun or manual tapping, while achieving demolding, have several drawbacks. Using a demolding air gun requires significant pressure to demold the test block, placing high demands on the equipment. Furthermore, because the test block may adhere to the mold, it is difficult to inflate initially, easily leading to equipment and test block damage. Additionally, the demolding air gun requires pre-drilled holes and is covered with tape to prevent grout leakage, but grout leakage is still common in practice. Moreover, the air pump is noisy, requires skilled operation, and poses certain safety hazards. Manual tapping demolding, on the other hand, is labor-intensive, inefficient, and causes significant noise pollution. Moreover, the need to tap and bump the test block during demolding easily damages it.

[0004] Chinese utility model patent CN 221112300 U discloses a demolding mechanism for ceramsite concrete test blocks, which uses three hydraulic cylinders for lifting and demolding. Demolding is achieved by pushing a top block with the hydraulic cylinders. However, such devices often lack effective fixing components, making the test block prone to displacement or tilting during demolding, affecting the demolding effect. Furthermore, these devices often only push the test block in one direction during demolding, making them unsuitable for test blocks of different shapes and sizes. Utility Model Content

[0005] To address the problems associated with traditional demolding methods, this invention provides a novel concrete specimen demolding device. This improves the efficiency and quality of concrete specimen demolding, while reducing specimen damage and safety hazards.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A concrete test block demolding device includes: a multi-unit mold, a demolding auxiliary frame, a top block mechanism, and a manual lifting device; the multi-unit mold includes multiple mold cavities for forming concrete compressive strength test blocks, each mold cavity having a circular opening at its bottom, and a gasket plate covering the circular opening; the top block mechanism includes a mounting plate and multiple top blocks connected to it, the top blocks extending under the gasket plate through the circular opening; the demolding auxiliary frame, from bottom to top, includes a mounting base connected to the frame body, a supporting longitudinal beam, and a limiter, the mounting base being used to connect the manual lifting device, the top block mechanism being placed on the manual lifting device, the supporting longitudinal beam being used to place the multi-unit mold, and the limiter being used to limit and fix the multi-unit mold; the upper part of the manual lifting device is in contact with the mounting plate of the top block mechanism.

[0007] The limiter is a sliding limiter, which includes two limit rods that limit the two sides of the multi-unit mold. The two ends of the limit rods are connected to the upper crossbeam of the demolding auxiliary frame through sliding sleeves.

[0008] The manual lifting device is a diamond-shaped jack. The base of the diamond-shaped jack is fixedly connected to the mounting seat and the jack head by bolts to smoothly lift the jacking block mechanism.

[0009] The circular opening has a diameter of 120mm; the gasket plate has a flat size of 150mm × 150mm and a thickness of 5mm.

[0010] The top block is a cylinder with a height of 80mm and a diameter of 100mm, and the mounting plate is 10mm thick.

[0011] The multi-unit mold, shim plate, and top block are all made of plastic, while the demolding auxiliary frame and manual lifting device are made of stainless steel.

[0012] This invention effectively solves the problems of low demolding efficiency, easily damaged test blocks, complex operation, and high safety risks. It has the advantages of simple molds, fast demolding efficiency, durability, single-person operation, low carbon footprint, environmental friendliness, and high safety. Specifically, these advantages are reflected in the following aspects.

[0013] 1. Efficient and convenient demolding process: This invention achieves efficient demolding of concrete test blocks by using a three-piece mold in conjunction with a demolding auxiliary frame. The circular opening and shim plate at the bottom of the three-piece mold, combined with the manual lifting device and top block, make the demolding process smoother, reducing tedious steps such as manual hammering and prying, and improving demolding efficiency.

[0014] 2. Precise and stable demolding control: The supporting longitudinal beams and sliding limiters on the demolding aid frame ensure the stability and positional accuracy of the mold during demolding. The sliding limiter design prevents the mold from moving freely during demolding, effectively avoiding problems such as test block damage and mold deformation.

[0015] 3. High adaptability and versatility: The three-part mold has a circular opening at the bottom of each cavity with a diameter of 120mm, and the spacer plate has a flat size of 150mm×150mm and a thickness of 5mm. These standardized designs make the device suitable for making concrete test blocks of various sizes, improving the device's versatility and flexibility.

[0016] 4. Simple structure and easy maintenance: The demolding device of this invention has a simple structure, mainly composed of a three-piece mold, a demolding auxiliary frame, a top block, and a manual lifting device. The components are tightly connected and easy to disassemble, facilitating daily maintenance and upkeep. Furthermore, the design of the manual lifting device makes operation more intuitive and simple, requiring no complex electrical or hydraulic systems.

[0017] 5. The materials are carefully selected and highly durable. The mold and shim plate are made of plastic, which has the advantages of being lightweight, corrosion-resistant and easy to process; the auxiliary demolding frame and manual lifting device are made of stainless steel, which has the characteristics of high strength, wear resistance and corrosion resistance, ensuring the long-term stable operation of the device.

[0018] 6. Improved operational safety and reduced labor intensity: The manual lifting device allows operators to easily raise and lower the top block by manually driving the rotating shaft through the handle, avoiding potential safety hazards and physical exertion associated with traditional demolding methods. Furthermore, the stability and precise control during demolding further reduce operational difficulty and labor intensity. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a 3D schematic diagram of a multi-unit mold: Figure 3 This is a cross-sectional view of a multi-unit mold; Figure 4 This is a top view of a multi-unit mold (excluding the gasket plate). Figure 5 This is a schematic diagram of the top block mechanism; Figure 6 This is a schematic diagram of the demolding auxiliary frame structure; Figure 7 This is a schematic diagram of the manual lifting device. In the figure, there is a multi-unit mold 1, a gasket plate 101, a circular opening 102, a demolding auxiliary frame 2, a mounting base 201, a supporting longitudinal beam 202, a limiter 203, a sliding sleeve 204, a top block mechanism 3, a mounting plate 301, a top block 302, a manual lifting device 4, a base 401, and a top head 402. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to the specific embodiments.

[0021] Example 1

[0022] like Figure 1 As shown, a concrete test block demolding device includes: a multi-unit mold 1, a demolding auxiliary frame 2, a block lifting mechanism 3, and a manual lifting device 4; like Figures 2-4 As shown, the multi-unit mold 1 includes multiple mold cavities for forming concrete compressive strength test blocks. Each mold cavity has a circular opening 102 at the bottom, and a gasket plate 101 covers the circular opening 102. like Figure 5 As shown, the top block mechanism 3 includes a mounting 301 and a plurality of top blocks 302 connected thereto. The top blocks 302 extend into the underside of the gasket plate 101 through a circular opening 102. like Figure 6 As shown, the demolding auxiliary frame 2 includes, from bottom to top, a mounting base 201 connected to the frame body, a supporting longitudinal beam 202, and a limiter 203. The mounting base 201 is used to connect the manual lifting device 4. The mounting plate 301 of the top block mechanism 3 is placed on the manual lifting device 4. The supporting longitudinal beam 202 is used to place the multi-unit mold 1. The limiter 203 is used to limit and fix the multi-unit mold 1. The limiter 203 is a sliding limiter, comprising two limit rods positioned on both sides of the multi-unit mold 1. The two ends of the limit rods are connected to the upper crossbeam of the demolding auxiliary frame 2 via sliding sleeves 204. The sliding sleeves 204 can slide left and right to facilitate the placement of the demolding device and serve as a limiter. After the sliding sleeves 204 are in place, they will not slide left or right during the pushing operation due to vertical pressure and friction. Figure 7 As shown, the manual lifting device 4 is a diamond-shaped jack. The base 401 of the diamond-shaped jack is fixedly connected to the mounting base 201 and the jack head 402 by bolts to smoothly lift the jacking mechanism 3.

[0023] The circular opening 102 has a diameter of 120mm; the gasket plate 101 has a planar dimension of 150mm×150mm and a thickness of 5mm.

[0024] The top block 302 is a cylinder with a height of 80mm and a diameter of 100mm, and the mounting plate 301 is 10mm thick.

[0025] The multi-unit mold 1, the gasket plate 101, and the top block mechanism 3 are all made of plastic, while the demolding auxiliary frame 2 and the manual lifting device 4 are made of stainless steel.

[0026] Example 2

[0027] A method for demolding concrete test blocks using the apparatus described in Example 1 includes the following steps: S1: Multi-unit mold assembly. Clean the multi-unit mold 1 thoroughly, place the gasket plate 101 inside the mold cavity, covering the bottom circular opening 102. Then apply the release agent evenly.

[0028] S2: Test block molding. Concrete is poured into the mold cavity, vibrated to compact, and then cured.

[0029] S3: Demolding Preparation. Secure the manual lifting device 4 to the mounting base 201 of the demolding auxiliary frame 2. Place the concrete multi-unit mold 1, which meets the demolding requirements, and the concrete test block on the supporting longitudinal beam 202. Slide the limiters 203, allowing the two limiters 203 to move and be fixed above both sides of the mold via sliding sleeves 204. This prevents the mold from moving upwards during demolding and allows the concrete test block to be ejected. Place the top block 302 below the multi-unit mold 1, with the center of the multi-unit mold 1 located above the manual lifting device 4. Ensure the three cylindrical top blocks are concentric with the circular opening 102 at the bottom of the multi-unit mold 1.

[0030] S4: Demolding. Operate the manual lifting device 4 so that its top head 402 presses against the top block 302 and slowly rises. Under the pressure of the top block 302, the pad plate 101 pushes the test block out of the mold slowly.

[0031] S5: Demolding complete. Place the test block properly in the curing room for continued curing.

[0032] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although references are made to this embodiment, The embodiments provide a detailed description of the present invention. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A concrete test block demolding device, characterized in that: include: The system comprises a multi-unit mold, a demolding auxiliary frame, a top block mechanism, and a manual lifting device. The multi-unit mold includes multiple mold cavities for forming concrete compressive strength test blocks, each cavity having a circular opening at its bottom covered by a gasket plate. The top block mechanism includes a mounting plate and multiple top blocks connected to it, each top block extending through the circular opening below the gasket plate. The demolding auxiliary frame, from bottom to top, includes a mounting base connected to the frame body, a supporting longitudinal beam, and a limiter. The mounting base connects to the manual lifting device, the top block mechanism is placed on the manual lifting device, the supporting longitudinal beam holds the multi-unit mold, and the limiter limits and fixes the multi-unit mold. The upper part of the manual lifting device contacts the mounting plate of the top block mechanism.

2. The concrete test block demolding device according to claim 1, characterized in that: The limiter is a sliding limiter, which includes two limit rods that limit the two sides of the multi-unit mold. The two ends of the limit rods are connected to the upper crossbeam of the demolding auxiliary frame through sliding sleeves.

3. The concrete test block demolding device according to claim 1, characterized in that: The manual lifting device is a diamond-shaped jack. The base of the diamond-shaped jack is fixedly connected to the mounting seat and the jack head by bolts to smoothly lift the jacking block mechanism.

4. A concrete test block demolding device according to claim 1, characterized in that: The circular opening has a diameter of 120mm; the gasket plate has a flat size of 150mm × 150mm and a thickness of 5mm.

5. A concrete test block demolding device according to claim 1, characterized in that: The top block is a cylinder with a height of 80mm and a diameter of 100mm, and the mounting plate is 10mm thick.

6. A concrete test block demolding device according to any one of claims 1 to 5, characterized in that: The multi-unit mold, shim plate, and top block are all made of plastic, while the demolding auxiliary frame and manual lifting device are made of stainless steel.

Images