Sprayed concrete circular plate bending toughness test block forming device

Abstract

The utility model relates to the technical field of concrete test block manufacturing, in particular to a sprayed concrete circular plate bending toughness test block forming device which comprises a machine frame and a forming demoulding mechanism detachably connected in the machine frame, the forming demoulding mechanism comprises a reciprocating motion component, a support and a mould ring, the support comprises a circular cage body, and the mould ring is arranged in the cage body. A rotating shaft is arranged at the circumferential end of the cage body, a bearing is arranged on the rack, and the rotating shaft is connected into the bearing; a bottom plate and a fixing plate are arranged at the two ends of the cage body respectively, the reciprocating motion component comprises an electric push rod, the fixed end of the electric push rod is fixed to the fixing plate, a groove is formed in the side, away from the electric push rod, of the bottom plate, a through hole is coaxially formed in the groove, a push plate is arranged at the groove, the free end of the electric push rod penetrates through the through hole to be connected with the push plate, and the shape and size of the push plate are consistent with those of the groove; the mold ring is annular and detachably connected to the face, away from the cage body, of the bottom plate. By implementing the scheme, the test block demolding effect and the operation efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of concrete test block manufacturing technology, specifically to a molding device for a shotcrete circular plate bending toughness test block. Background Technology

[0002] Currently, the equipment for preparing shotcrete circular plate specimens mainly falls into two categories:

[0003] The first method involves using a single steel or wooden ring fixed to a flat plate for specimen molding. This method makes sampling difficult after the specimen is molded, and requires manually inverting the upper surface of the mold on the ground and tapping it to demold it. If the bonding is too tight, the specimen may be damaged during tapping, affecting the test results.

[0004] The second method involves dividing the ring evenly into several semicircles, fixing each semicircle with bolts, and then separating the semicircles by removing the bolts to remove the specimen. However, this method has two drawbacks: firstly, using multiple bolts for fixing requires a significant amount of time for installation, and disassembly requires tools, making the operation cumbersome and inconvenient for quick assembly and disassembly; secondly, the adhesion between the concrete and the mold or base plate can affect the smooth removal of the specimen. Furthermore, because the shotcrete circular plate bending toughness specimen is quite heavy, performing the above operations is very laborious and poses safety hazards.

[0005] In order to overcome the shortcomings of existing technologies and improve the efficiency of disassembly and demolding, there is an urgent need for a shotcrete circular plate bending toughness test block molding device that is simple to operate, easy to disassemble and assemble, and has high demolding efficiency and good effect. Utility Model Content

[0006] The present invention aims to provide a molding device for the bending toughness test block of sprayed concrete circular plate, which is mainly used for molding sprayed concrete test blocks, improving the demolding effect and increasing the operating efficiency.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A molding device for shotcrete circular slab bending toughness test blocks includes a frame and a molding and demolding mechanism detachably connected inside the frame. The molding and demolding mechanism includes a reciprocating motion component, a support, and a mold ring. The support includes a circular cage with a rotating shaft at the circumferential end of the cage. A bearing is provided on the frame, and the rotating shaft is connected to the bearing. A bottom plate and a fixed plate are respectively provided at both ends of the cage. A handle is provided on the side of the fixed plate away from the cage. The reciprocating motion component includes an electric actuator. The fixed end of the electric actuator is fixed to the fixed plate. A groove is provided on the side of the bottom plate away from the electric actuator. A through hole is coaxially provided in the groove, and a push plate is provided at the groove. The free end of the electric actuator passes through the through hole and connects to the push plate. The shape and size of the push plate are consistent with the groove. The mold ring is annular and detachably connected to the side of the bottom plate away from the cage.

[0009] The principles and advantages of this scheme are:

[0010] This solution is an improvement upon traditional concrete block molding equipment. The equipment mainly includes a frame, a molding and demolding mechanism, and bearings on the frame. The molding and demolding mechanism has a rotating shaft fixed within the bearings. The entire molding and demolding mechanism can rotate around the shaft and bearings, and a handle is provided for easy rotation of the cage. The molding and demolding mechanism mainly includes an electric actuator, a support, and a mold ring. The mold ring completes the block molding process, and the electric actuator and support achieve the demolding operation. Existing reciprocating mechanisms generally use mechanical methods, such as lead screws or levers. For blocks that are firmly bonded to the base plate, the operation is very laborious, and there is a possibility that the block cannot be pushed out. Therefore, to improve demolding efficiency, an electric actuator is selected for the demolding operation. After the block is molded within the mold ring, the electric actuator, installed in the support, pushes the push plate to eject the block from the mold ring, thus achieving demolding.

[0011] Compared to existing specimen molding devices, this solution offers several advantages. Traditional devices require rotating the entire device to face upwards after receiving concrete for easy specimen molding. Demolding then necessitates rotating the device to orient the mold ring opening towards a horizontal or downward direction, a laborious and cumbersome process requiring manual operation. This solution incorporates bearings, allowing for easy rotation. Furthermore, unlike traditional demolding methods, this solution uses an electric actuator to separate the specimen from the mold ring, eliminating the need for hammering and preserving the specimen's physical and mechanical properties, thus ensuring accurate experimental data. Finally, compared to traditional mold rings, this solution uses two semi-circular rings, avoiding both the cumbersome installation of multi-segment mold rings and the difficulty of demolding integrated mold rings.

[0012] Preferably, as an improvement, the frame is also provided with an electric lifting mechanism, and the bearing is fixedly connected to the moving end of the electric lifting mechanism.

[0013] The current demolding operation involves manually lifting the demolding device, rotating it 90°, and then placing it on the ground. To adapt this device to different environments and devices, and to further optimize the entire test block molding and demolding process, an electric lifting mechanism is installed on the frame. This electric lifting mechanism eliminates the need for manual lifting. Once the electric lifting mechanism has raised the device to the required height, the operator can grasp the handle and rotate it to adjust the orientation of the cage. This significantly reduces the intensity of manual operation, prevents injuries to operators, and avoids potential safety hazards.

[0014] Preferably, as an improvement, the frame also includes two uprights, and the electric lifting mechanism is installed inside the two uprights. Each upright is provided with a sliding groove, and the bearing is slidably connected in the sliding groove.

[0015] To protect the electric lifting mechanism and provide a more stable working environment, the electric lifting mechanism is installed inside the two uprights, and grooves for the bearings to slide are opened on the uprights. In this way, the stability of the electric lifting mechanism is greatly improved, thus enhancing the overall stability.

[0016] Preferably, as an improvement, a fixing ring is provided at the end of the cage away from the bottom plate, and the fixing plate is detachably connected to the fixing ring.

[0017] To facilitate the installation and maintenance of the electric actuator, the bracket was optimized by adding a fixing ring to the cage. The base plate, which was originally welded to the cage, was connected to the fixing ring in a detachable manner. During maintenance, the fixing plate can be directly removed to facilitate maintenance of the cage interior and the electric actuator.

[0018] Preferably, as an improvement, the mold ring includes two semicircular rings that are detachably connected; a support lug is provided on one bottom surface of the semicircular ring, and screw holes are provided on both the support lug and the bottom plate.

[0019] Existing mold rings generally use either a one-piece ring or a multi-segment ring. While one-piece rings eliminate the need for time-consuming fixing during use, they tend to adhere to the base plate and sidewalls after concrete molding, making demolding and sampling difficult. Furthermore, manual demolding requires placing the upper surface of the mold upside down on the ground and tapping it. If the adhesion is too tight, tapping may damage the specimen, affecting test results. Multi-segment rings use multiple bolts for fixing, requiring significant installation time and tools for disassembly, making the process cumbersome and inconvenient for quick assembly and disassembly. Therefore, this solution prioritizes ease of installation and demolding by designing two semi-circular rings. The two rings are detachably connected at their ends and secured to the base plate of the support plate via lugs with screw holes on one side of the semi-circular ring's bottom surface. Compared to traditional multi-segment mold rings, this design simplifies overall installation and disassembly, significantly reducing installation and disassembly time.

[0020] Preferably, as an improvement, the push plate is a circular push plate, and the groove in the bottom plate is a circular groove.

[0021] Considering that frequent use can cause the connection between the electric actuator and the push plate to loosen, leading to the push plate rotating, the polygonal push plate may become misaligned and unable to retract into the groove, requiring manual adjustment, increasing workload, and potentially damaging the push plate if the problem is not detected and addressed promptly. Therefore, a circular push plate and groove are chosen to avoid this issue and enhance the stability of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the shotcrete circular plate bending toughness test block forming device according to an embodiment of this utility model.

[0023] Figure 2 This is an exploded view of the structure of the shotcrete circular plate bending toughness test block forming device according to an embodiment of this utility model.

[0024] Figure 3 This is a schematic diagram of the ejector plate of the shotcrete circular plate bending toughness test block forming device according to an embodiment of this utility model.

[0025] Figure 4 This is a schematic diagram of the electric lifting mechanism of the shotcrete circular plate bending toughness test block forming device according to an embodiment of this utility model.

[0026] Figure 5 This is a schematic diagram of the working state of the test block forming device for the bending toughness test block of sprayed concrete circular plate according to an embodiment of this utility model.

[0027] Figure 6 This is a side view of the core part of the shotcrete circular plate bending toughness test block forming device according to an embodiment of this utility model.

[0028] Figure 7 for Figure 5 A sectional view.

[0029] Figure 8 This is a schematic diagram showing the placement of sprayed concrete in the bending toughness test block forming device of the sprayed concrete circular plate according to an embodiment of this utility model. Detailed Implementation

[0030] The following detailed description illustrates the specific implementation method:

[0031] The reference numerals in the accompanying drawings include: frame 1, bearing 101, slide 102, electric lifting mechanism 2, fixing plate 3, handle 301, bracket 4, rotating shaft 401, fixing ring 402, base plate 403, cage 404, electric push rod 5, push plate 6, and mold ring 7.

[0032] The basic implementation examples are as follows: Figure 1-8 As shown:

[0033] As attached Figure 1 As shown, the entire assembly, from the outside in, includes a frame 1 and a molding and demolding mechanism. The four corners of the bottom of the frame 1 are bolted to the ground to prevent the device from tipping over. (See attached diagram.) Figure 2 As shown, the molding and demolding mechanism includes a reciprocating motion component, a support 4, and a mold ring 7. The support 4 includes a circular cage 404, with rotating shafts 401 symmetrically mounted on the left and right sides of the circumferential ends of the cage 404. The support 4 is located inside the frame 1. (See attached diagram) Figure 4As shown, an electric lifting mechanism 2 is installed in the two uprights of the frame 1. In this embodiment, the electric lifting mechanism 2 is a hydraulic cylinder. Slide grooves 102 are provided on the uprights on both the left and right sides of the frame 1. The hydraulic cylinder is installed inside the upright, and a bearing 101 is fixedly connected to the side of the hydraulic cylinder's telescopic rod facing the slide groove. The rotating shaft 401 is connected to the bearing 101. For ease of observation, Figure 4 In the diagram on the right, only the pivot 401 is shown in the bracket 4; the other parts are not depicted. The bracket 4 is lifted by the electric lifting mechanism 2, which drives the bearing 101. The electric lifting mechanism 2 eliminates the need for manual lifting, improving overall operational efficiency and avoiding potential safety hazards. The cage 404 has a bottom plate 403 at its bottom. The side of the bottom plate 403 away from the bracket 4 has a groove, and a through hole is located in the center of the groove.

[0034] The reciprocating motion component includes an electric push rod 5. To improve demolding efficiency, the electric push rod 5 is selected for the pushing demolding operation. The left and right ends of the cage 404 are respectively equipped with a fixing ring 402 and a base plate 403. The right side of the base plate 403 has a groove with a through hole coaxially arranged within it, and a push plate 6 is located at the groove. The left end of the electric push rod 5 is bolted to the fixing plate 3, which is bolted to the fixing ring 402 of the bracket 4. The free end of the electric push rod 5 passes through the through hole and connects to the push plate. A handle 301 is located on the side of the fixing plate away from the cage 404, allowing the operator to easily rotate the cage 404. Both the push plate 6 and the groove are circular. The diameter of the push plate 6 is equal to the diameter of the groove, and the thickness of the push plate 6 is equal to the depth of the groove. Using a circular push plate 6 and groove eliminates the need for manual adjustment of the push plate 6's position. (See attached diagram) Figure 6 , 7 As shown, when the push plate 6 is fully retracted, it fits snugly inside the groove, filling the groove and making the base plate 403 a complete flat surface. The mold ring 7 includes two semicircular rings connected by bolts. Each semicircular ring has a lug with a screw hole on one side of its bottom surface. The mold ring 7 is fixed to the base plate 403 with bolts. The two semicircular rings are also fixed at their ends with bolts, and then fixed to the base plate 403 of the bracket 4 by the lugs with screw holes on one side of their bottom surfaces. The overall installation and disassembly are simple, greatly reducing installation and disassembly time.

[0035] The shotcrete circular plate bending toughness test block molding device of this solution adopts electric demolding and lifting, which greatly reduces the labor intensity of operators, improves the demolding effect and efficiency, and solves the problems of difficult demolding and complicated operation of existing test block molding devices.

[0036] The specific implementation method is as follows:

[0037] To protect and facilitate maintenance, the device is normally in the following state: Figure 5 As shown, when needed, please refer to the attached document. Figure 4As shown, the forming and demolding mechanism is lifted by the electric lifting mechanism 2, and then the cage 404 is rotated by grasping the handle 301 to make the cage 404 horizontal. The electric lifting mechanism then lowers the cage 404, and the cage 404 rests against the lower part of the frame, as shown in the attached figure. Figure 1 As shown, the process enters the shotcrete receiving state. The shotcrete is sprayed into the mold ring 7, with the base plate 403 as the plane and the inside of the mold ring 7 as the sidewall, to form a circular plate bending toughness test block. (See attached diagram) Figure 8 As shown, operate the rotary molding and demolding mechanism to a horizontal position with the opening of mold ring 7 facing upwards. After the concrete test block is formed, as shown in the attached diagram. Figure 5 As shown, the rotary molding demolding mechanism is operated 180°, with the opening of the mold ring 7 facing the ground. The forklift is positioned so that the forks are below the opening of the mold ring 7. The electric push rod 5 is activated to push the test block away from the mold ring 7, completing the molding and demolding operation of the circular plate bending toughness test block.

[0038] The operation method for shotcrete with added accelerator is as follows:

[0039] As attached Figure 4 As shown, the forming and demolding mechanism is lifted by the electric lifting mechanism 2, and then the cage 404 is rotated by grasping the handle 301 to make the cage 404 horizontal. The electric lifting mechanism then lowers the cage 404, and the cage 404 rests against the lower part of the frame, as shown in the attached figure. Figure 1 As shown, the process enters the shotcrete receiving state. The shotcrete is sprayed into the mold ring 7, with the base plate 403 as the plane and the inside of the mold ring 7 as the sidewall, to form a circular plate bending toughness test block. Due to the addition of a quick-setting agent, the shotcrete sets quickly, and the test block can be formed without rotating the device. After the concrete test block is formed, as shown in the attached diagram... Figure 5 As shown, the rotary molding demolding mechanism is operated at 90°, with the opening of the mold ring 7 facing the ground. The forklift is positioned so that the forks are below the opening of the mold ring 7. The electric push rod 5 is activated to push the test block away from the mold ring 7, completing the molding and demolding operation of the circular plate bending toughness test block.

[0040] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A molding device for shotcrete circular plate bending toughness test blocks, characterized in that: The device includes a frame and a molding and demolding mechanism detachably connected inside the frame. The molding and demolding mechanism includes a reciprocating motion component, a support, and a mold ring. The support includes a circular cage with a rotating shaft at the circumferential end. A bearing is provided on the frame, and the rotating shaft is connected to the bearing. A bottom plate and a fixed plate are respectively provided at both ends of the cage. The reciprocating motion component includes an electric push rod. The fixed end of the electric push rod is fixed to the fixed plate. A groove is provided on the side of the bottom plate away from the electric push rod. A through hole is coaxially provided in the groove, and a push plate is provided at the groove. The free end of the electric push rod passes through the through hole and connects to the push plate. The shape and size of the push plate are consistent with the groove. The mold ring is ring-shaped and can be detachably connected to the side of the bottom plate away from the cage.

2. The device for forming a shotcrete circular plate bending toughness test block according to claim 1, characterized in that: The frame is also equipped with an electric lifting mechanism, and the bearing is fixedly connected to the moving end of the electric lifting mechanism.

3. The device for forming a shotcrete circular plate bending toughness test block according to claim 2, characterized in that: The frame also includes two uprights, and the electric lifting mechanism is installed inside the two uprights. Both uprights are provided with sliding grooves, and the bearings are slidably connected in the sliding grooves.

4. The device for forming a shotcrete circular plate bending toughness test block according to claim 3, characterized in that: The cage body is also provided with a fixing ring at the end away from the bottom plate, and the fixing plate is detachably connected to the fixing ring.

5. The device for forming a shotcrete circular plate bending toughness test block according to claim 4, characterized in that: The mold ring includes two semicircular rings that are detachably connected; a support lug is provided on one bottom surface of the semicircular ring, and screw holes are provided on both the support lug and the bottom plate.

6. A molding device for the bending toughness test block of shotcrete circular plate according to any one of claims 1-5, characterized in that: The push plate is a circular push plate, and the groove in the bottom plate is a circular groove.

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