Equipment for detecting strength of cured high-density recycled concrete

Abstract

The utility model provides a post-curing strength detection device for high-density recycled concrete, and relates to the technical field of concrete detection, the post-curing strength detection device comprises a detection table, a discharging mechanism is arranged above the detection table, the discharging mechanism comprises a rectangular placing frame, and the lower end of the rectangular placing frame is fixedly communicated with the upper end of the detection table; an insertion groove is formed in the front face of the rectangular placement frame, a placement plate is slidably connected to the inner wall of the insertion groove in an inserted mode, the lower end of the placement plate makes contact with the upper end of the detection table, and by means of the discharging mechanism, after the placement plate is pulled out, concrete waste stacked on the placement plate falls into a collection box to be collected, the waste cleaning time is shortened, and the working efficiency is improved. And through the detection protection mechanism, when the lifting plate descends, a pull rope ingeniously drives a movable frame to ascend and move, so that a rectangular corrugated shrinkage cover is stretched upwards, protection is accurately formed above a detection area, subsequent scrap cleaning is avoided, and potential safety hazards caused by scrap splashing are eliminated.

Description

Technical Field

[0001] This utility model relates to the field of concrete testing technology, and in particular to a device for testing the post-curing strength of high-density recycled concrete. Background Technology

[0002] Recycled concrete, with its resource-saving and environmentally friendly characteristics, is gradually becoming an important alternative to traditional concrete and is widely used in various construction projects. Recycled concrete is made by crushing, screening, and reprocessing waste concrete, and then mixing it with cement, aggregates, admixtures, etc. in a specific ratio. This effectively realizes the resource utilization of construction waste, reduces dependence on natural aggregates, and reduces negative environmental impacts. Compared with ordinary concrete, recycled concrete has more complex raw material sources and greater differences in internal composition and microstructure. Therefore, it is necessary to test the strength of recycled concrete to ensure construction safety.

[0003] For example, a concrete strength testing device disclosed in Chinese patent literature (publication number: CN222049789U) uses a motor to drive a pulley to rotate around a threaded rod. The threaded block inside the fixed cylinder rises and falls along the threaded rod and drives the L-shaped connecting rod to rise and fall, causing the fixed cylinder at the top of the threaded rod to rotate and no longer press against the material drop plate. Ultimately, one side of the material drop plate rotates and tilts around the rotating rod, thereby enabling the concrete that has been tested in the testing frame to fall into the storage box in the frame. This facilitates automatic material drop, makes it convenient for staff to continue testing the strength of the remaining concrete, and improves the efficiency of strength testing.

[0004] However, when the material drop plate is subjected to testing pressure, it will directly transmit the pressure to the threaded block through the L-shaped connecting rod and act on the outside of the threaded rod, which will aggravate the wear of the threaded rod. Furthermore, the single lifting motion cannot be coordinated with the arc swing of the material drop plate through the hinge seat, which may cause mechanical jamming. In addition, during pressure testing, broken concrete debris will fly everywhere, which not only increases the subsequent cleaning labor but also poses a safety hazard to the operators. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies. Currently, the use of screw drives to drive the unloading plate results in mechanical jamming and increased wear, leading to low practicality. Furthermore, it easily generates debris during inspection, posing safety hazards and increasing the labor burden for cleaning.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A device for testing the post-curing strength of high-density recycled concrete includes a testing platform, an unloading mechanism above the testing platform, and the unloading mechanism includes a rectangular placement frame, the lower end of which is fixedly connected to the upper end of the testing platform.

[0008] The rectangular placement frame has a slot on its front side, and a placement plate is slidably inserted into the inner wall of the slot. The lower end of the placement plate contacts the upper end of the testing platform, and the back of the placement plate contacts the rear inner wall of the rectangular placement frame. The testing platform has an inspection door on its front side and a collection box on its inner bottom wall.

[0009] The upper end of the rectangular placement frame is equipped with a detection and protection mechanism.

[0010] Preferably, the detection and protection mechanism includes a rectangular corrugated shrink hood, the lower end of which is fixedly connected to the upper end of the rectangular placement frame, and a movable frame is fixedly connected to the upper end of the rectangular corrugated shrink hood.

[0011] Preferably, the lower end of the movable frame is fixedly connected with symmetrically distributed return springs, and one end of the return spring is fixedly connected to the upper end of the rectangular placement frame.

[0012] Preferably, the upper end of the testing platform is fixedly connected to symmetrically distributed support blocks, and the upper ends of both support blocks are fixedly connected to top plates, with hydraulic cylinders fixedly installed on the upper ends of the top plates.

[0013] Preferably, one end of the hydraulic cylinder piston rod passes through and extends below the top plate, and a lifting plate is fixedly connected to one end of the hydraulic cylinder piston rod, with a pressure sensor fixedly installed at the lower end of the lifting plate.

[0014] Preferably, a detection block is fixedly installed at the lower end of the pressure sensor, a symmetrically distributed through groove is provided at the upper end of the top plate, and guide wheels are rotatably connected to the front and rear inner walls of the through groove via bearings, and a symmetrically distributed pull rope is fixedly connected to the upper end of the lifting plate.

[0015] Preferably, one end of the pull rope passes through the through groove and rolls in contact with the inner wall above the guide wheel, and is fixedly connected to the upper end of the movable frame.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In this invention, the unloading mechanism allows the concrete waste accumulated on top of the placement plate to fall into the collection box after the placement plate is pulled out, reducing the waste cleaning time and improving continuous testing efficiency. Furthermore, the detection protection mechanism uses a pull rope to cleverly drive the movable frame upward when the lifting plate descends, thereby stretching the rectangular corrugated shrink cover upward and precisely forming a protection above the detection area. This not only avoids subsequent debris cleaning but also eliminates the safety hazards caused by flying debris. Attached Figure Description

[0018] Figure 1 A schematic diagram of the main structure of a post-curing strength testing device for high-density recycled concrete provided by this utility model;

[0019] Figure 2 A three-dimensional view of the testing platform structure of a high-density recycled concrete post-curing strength testing device provided by this utility model;

[0020] Figure 3 A three-dimensional view of the testing block structure of a high-density recycled concrete post-curing strength testing device provided by this utility model;

[0021] Figure 4 An exploded view of the rectangular placement frame structure of a high-density recycled concrete post-curing strength testing device provided by this utility model.

[0022] Legend: 1. Testing table; 2. Rectangular placement frame; 21. Slot; 22. Placement plate; 23. Inspection door; 24. Collection box; 3. Rectangular corrugated shrink cover; 31. Movable frame; 32. Return spring; 33. Support block; 34. Top plate; 35. Hydraulic cylinder; 36. Lifting plate; 37. Pressure sensor; 38. Testing block; 39. Through slot; 310. Guide wheel; 311. Pull rope. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] Example

[0028] like Figure 1-4 As shown, this utility model provides a technical solution: a high-density recycled concrete post-curing strength testing device, including a testing platform 1. The testing platform 1 is made of high-strength, high-stability steel with good rust resistance through precision welding and machining. The testing platform 1 not only provides stable support for the components above, but also effectively resists vibration and impact during the testing process, ensuring the overall stable operation of the equipment and guaranteeing testing accuracy. A material unloading mechanism is cleverly arranged above the testing platform 1, which greatly simplifies the sample replacement and waste disposal process, creating favorable conditions for continuous and rapid testing. The material unloading mechanism includes a rectangular placement frame 2. The lower end of the rectangular placement frame 2 is fixedly connected to the upper end of the testing platform 1 through a high-strength welding process to form an integrated structure, ensuring a stable connection when subjected to material impact and vibration, without loosening or deformation.

[0029] The front of the rectangular placement frame 2 is precision-milled to create a slot 21. The inner wall of the slot 21 is finely polished to ensure a high degree of sliding fit between it and the placement plate 22. This ensures smooth sliding of the placement plate 22 while effectively preventing excessive gaps that could lead to concrete debris leakage. The placement plate 22 is slidably inserted into the inner wall of the slot 21. The placement plate 22 is made of a smooth, wear-resistant metal material, and its lower end is in close contact with the upper end of the testing platform 1. The back of the placement plate 22 fits well against the rear inner wall of the rectangular placement frame 2, ensuring a smooth sliding fit. The device remains stable during normal use and during operation without shifting. The front of the testing station 1 is fitted with a maintenance door 23 via a hinge. The maintenance door 23 is made of a material with good sealing properties, which can effectively prevent dust and moisture from entering the interior of the testing station 1 when closed, ensuring the normal operation of the internal components. The inner bottom wall of the testing station 1 is fitted with a collection box 24 via a slot or welding method. The collection box 24 is made of corrosion-resistant and easy-to-clean plastic or metal material, and its capacity is reasonably designed to accommodate waste generated from multiple tests, avoiding frequent cleaning and improving testing efficiency.

[0030] The upper part of the rectangular placement frame 2 is finely constructed with a detection protection mechanism to protect the detection area in all directions, prevent debris from flying and causing safety accidents, and at the same time avoid debris from falling and affecting the operation of the equipment and the detection environment.

[0031] The detection and protection mechanism includes a rectangular corrugated shrink hood 3. The rectangular corrugated shrink hood 3 is made of high-strength, flexible rubber or plastic material with certain wear resistance. Its lower end is firmly fixed to the upper end of the rectangular placement frame 2 by strong glue or sealing strip to ensure a tight connection and prevent gaps from appearing during stretching and shrinking, effectively preventing debris from spilling out. The upper end of the rectangular corrugated shrink hood 3 is fixedly connected to a movable frame 31 by welding or riveting. The movable frame 31 is made of metal or engineering plastic material with moderate rigidity and light weight. Its structural design fully considers the coordination with the pull rope 311 and the return spring 32 to ensure smooth and stable operation during the execution of the protection action.

[0032] The lower end of the movable frame 31 is fixedly connected by welding to symmetrically distributed return springs 32. The return springs 32 are stainless steel springs with suitable elastic coefficient and long fatigue life. One end of the return springs 32 is firmly fixedly connected to the upper end of the rectangular placement frame 2 by spot welding. During the operation of the equipment, the return springs 32 flexibly adjust the position of the movable frame 31 according to the system requirements to ensure that the protective components fit tightly and ensure the protective effect.

[0033] The upper end of the testing platform 1 is fixedly connected by welding to symmetrically distributed support blocks 33. The support blocks 33 are made of high-strength, structurally stable metal material, providing solid support for the top plate 34. The upper ends of the two support blocks 33 are fixedly connected to the top plate 34 by welding. The top plate 34 is made of metal plate with high flatness and high rigidity. The upper end of the top plate is fixedly installed with a hydraulic cylinder 35 by bolts. The hydraulic cylinder 35 is an industrial-grade, high-precision, high-thrust hydraulic power unit. Its installation position and fixing method have been precisely calibrated to ensure that the piston rod extension direction is vertically downward, providing power guarantee for precise pressure application.

[0034] One end of the piston rod of the hydraulic cylinder 35 passes through a precision-machined guide sleeve and extends to the bottom of the top plate 34. The guide sleeve is made of wear-resistant and low-friction coefficient material to ensure smooth extension and retraction of the piston rod without jamming or deflection. One end of the piston rod of the hydraulic cylinder 35 is fixedly connected to a lifting plate 36 by welding. The lifting plate 36 is made of high-strength and lightweight metal material. A pressure sensor 37 is fixedly installed at its lower end by bolts. The pressure sensor 37 is a high-precision and high-sensitivity strain gauge sensor, which can monitor the pressure applied by the pressure block 38 in real time and accurately, and feed the signal back to the control system.

[0035] The lower end of the pressure sensor 37 is fixedly mounted with a detection block 38 by bolts. The detection block 38 is made of metal with moderate hardness and low surface roughness. Its shape and size are designed according to the specifications of common recycled concrete test blocks to ensure full and uniform pressure with the test block. The upper end of the top plate 34 is provided with symmetrically distributed through grooves 39 through precision milling. The front and rear inner walls of the through grooves 39 are rotatably connected to guide wheels 310 through high-precision bearings. The guide wheels 310 are made of metal or engineering plastic with low friction coefficient and high wear resistance. They rotate flexibly and provide precise guidance for the pull rope 311 to ensure that the pull rope 311 does not tangle or jam during the lifting process. The upper end of the lifting plate 36 is fixedly connected with symmetrically distributed pull ropes 311 by welding. The pull ropes 311 are made of high-strength and flexible steel wire rope or fiber rope. Their length and thickness are reasonably configured according to the structural dimensions of the equipment to ensure stable and reliable force transmission during linkage.

[0036] One end of the pull rope 311 is inserted into the through groove 39 and rolls in contact with the inner wall above the guide wheel 310. It is then fixedly connected to the upper end of the movable frame 31 by welding or hooking to ensure a firm connection. During the pulling of the pull rope 311, the movable frame 31 can respond precisely and drive the rectangular corrugated shrink cover 3 to move synchronously, achieving efficient protection.

[0037] The working process of this utility model:

[0038] Step 1: Place the high-density recycled concrete test block to be tested stably on the placement plate 22, ensuring that the test block is directly below the testing pressure block 38. After the test block is placed, the testing process can be started. Start the hydraulic cylinder 35, and the piston rod extends under the hydraulic power, pushing the lifting plate 36 and the testing pressure block 38 below to move vertically downward at a uniform speed. At the same time, one end of the pull rope 311 descends synchronously with the lifting plate 36. Under the precise guidance of the guide wheel 310, the pull rope 311 pulls the movable frame 31 to overcome the elastic force of the return spring 32 and rise steadily. The rectangular corrugated shrinkage cover 3 is then precisely stretched upward, making way for the testing pressure block 38 and forming a tight protection above the testing area. After the testing pressure block 38 contacts the test block, it continuously applies pressure. The pressure sensor 37 records the pressure data in real time and transmits it to the control system. The control system accurately determines the strength after curing based on the preset algorithm, combined with the test block's deformation under pressure and pressure changes.

[0039] Step two: After the test is completed, the piston rod of the hydraulic cylinder 35 retracts under the command of the control system, the lifting plate 36 rises accordingly, the pull rope 311 gradually loosens, and the movable frame 31 quickly falls back under the drive of the return spring 32. The rectangular corrugated shrink cover 3 retracts back to its original state. At this time, if the test block breaks and produces flying debris during the test, it will fall above the placement plate 22 due to the obstruction of the rectangular corrugated shrink cover 3. Then, the placement plate 22 is pulled out, and the concrete waste and debris on the placement plate 22 will automatically fall into the collection box 24, ready for the next round of testing. When the waste in the collection box 24 accumulates to a certain level and needs to be cleaned, the operator opens the maintenance door 23, takes out the collection box 24 for cleaning, puts it back in its original position after cleaning, and closes the maintenance door 23.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for testing the post-curing strength of high-density recycled concrete, comprising a testing platform (1), characterized in that: A material unloading mechanism is provided above the testing platform (1), and the material unloading mechanism includes a rectangular placement frame (2), the lower end of the rectangular placement frame (2) being fixedly connected to the upper end of the testing platform (1); The rectangular placement frame (2) has a slot (21) on its front side. A placement plate (22) is slidably inserted into the inner wall of the slot (21). The lower end of the placement plate (22) contacts the upper end of the testing table (1). The back of the placement plate (22) contacts the rear inner wall of the rectangular placement frame (2). The testing table (1) has an inspection door (23) on its front side. A collection box (24) is provided on the inner bottom wall of the testing table (1). The upper end of the rectangular placement frame (2) is provided with a detection and protection mechanism.

2. The post-curing strength testing equipment for high-density recycled concrete according to claim 1, characterized in that: The detection and protection mechanism includes a rectangular corrugated shrink hood (3), the lower end of which is fixedly connected to the upper end of the rectangular placement frame (2), and a movable frame (31) is fixedly connected to the upper end of the rectangular corrugated shrink hood (3).

3. The post-curing strength testing equipment for high-density recycled concrete according to claim 2, characterized in that: The lower end of the movable frame (31) is fixedly connected with symmetrically distributed reset springs (32), and one end of the reset springs (32) is fixedly connected to the upper end of the rectangular placement frame (2).

4. The post-curing strength testing equipment for high-density recycled concrete according to claim 2, characterized in that: The upper end of the testing platform (1) is fixedly connected to symmetrically distributed support blocks (33), and the upper ends of the two support blocks (33) are fixedly connected to top plates (34), and the upper ends of the top plates (34) are fixedly installed with hydraulic cylinders (35).

5. The post-curing strength testing equipment for high-density recycled concrete according to claim 4, characterized in that: One end of the piston rod of the hydraulic cylinder (35) passes through and extends to the bottom of the top plate (34). A lifting plate (36) is fixedly connected to one end of the piston rod of the hydraulic cylinder (35). A pressure sensor (37) is fixedly installed at the lower end of the lifting plate (36).

6. The post-curing strength testing equipment for high-density recycled concrete according to claim 5, characterized in that: The pressure sensor (37) is fixedly installed with a detection block (38) at its lower end. The top plate (34) has symmetrically distributed through grooves (39) at its upper end. The front and rear inner walls of the through grooves (39) are rotatably connected to guide wheels (310) through bearings. The upper end of the lifting plate (36) is fixedly connected with symmetrically distributed pull ropes (311).

7. The post-curing strength testing equipment for high-density recycled concrete according to claim 6, characterized in that: One end of the pull rope (311) passes through the through groove (39) and rolls in contact with the inner wall above the guide wheel (310) and is fixedly connected to the upper end of the movable frame (31).

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