A device for detecting mechanical properties of recycled concrete with improved detection accuracy

Abstract

The application discloses a recycled concrete mechanical property detection device capable of improving detection accuracy. The detection device comprises a support seat, the top of the support seat is fixed with an operation table, the top of the support seat is provided with a pressing assembly, the top of the operation table is provided with a clamping assembly near the center, the operation table is provided with multiple sets of adjusting assemblies, the multiple sets of adjusting assemblies are distributed around the clamping assembly, the top of the operation table is provided with a flatness detection assembly near one side edge, and the flatness detection assembly comprises a fixing seat, and the top of the fixing seat is provided with an air cylinder. Before mechanical detection, the position of the concrete block is adjusted through the adjusting assembly, the flatness detection assembly can detect the concave-convex surface of the concrete, the clamping assembly can fix the concrete block during the mechanical detection process, and the overall detection accuracy is improved.

Description

TECHNICAL FIELD

[0001] The application relates to a concrete performance detection device, in particular to a recycled concrete mechanical property detection device capable of detecting the flatness of the top surface of a concrete test block and improving detection accuracy. BACKGROUND

[0002] The recycled concrete mechanical property detection device is mainly used for evaluating the mechanical properties of recycled concrete to ensure that the recycled concrete meets engineering requirements. The recycled concrete is made by recycling waste concrete, and the mechanical property detection of the recycled concrete includes parameters such as compressive strength, tensile strength, flexural strength and elastic modulus. The adjustable recycled concrete mechanical property detection device is a device that can be adjusted and configured according to different testing requirements, and is used for evaluating various mechanical properties of recycled concrete. The flexibility and multifunctionality of such devices make them widely used in laboratory and field detection.

[0003] Most existing concrete mechanical property detection devices directly fix the concrete on the operation panel during the detection process, and start detection after visually checking whether the contact surface of the concrete and the detection equipment is flat. However, human visual inspection has a large error, and an uneven contact surface will lead to uneven pressure distribution, so that the measured pressure value cannot truly reflect the actual compressive strength of the concrete. Local areas may bear excessive pressure and be damaged in advance, thereby underestimating the overall compressive strength of the concrete and reducing the accuracy of the measurement results of the recycled concrete mechanical property detection device.

[0004] Therefore, we propose a recycled concrete mechanical property detection device to improve detection accuracy to solve the problems mentioned above. SUMMARY

[0005] The application aims to provide a recycled concrete mechanical property detection device that can improve detection accuracy. The detection device can detect the flatness of the top surface of a concrete test block before the mechanical property detection of the concrete, thereby avoiding the problem of large measurement error caused by uneven top surface of the concrete block. The device can also fix the concrete test block, thereby improving the accuracy of the mechanical detection of the concrete.

[0006] In order to achieve the above object, the application provides a recycled concrete mechanical property detection device for improving detection accuracy, which comprises a supporting seat, the top of the supporting seat is fixed with an operation table, a pressing assembly is arranged above the operation table, a clamping assembly is arranged at the top of the operation table close to the center, the clamping assembly is located directly below the pressing assembly and comprises a supporting base, a limiting ring and two groups of clamping mechanisms symmetrically arranged on the limiting ring, the supporting base is fixed on the operation table, the limiting ring is arranged on the supporting base, and a working position for placing a recycled concrete block to be detected is formed in the limiting ring; a plurality of adjustment assemblies are arranged on the operation table, the plurality of adjustment assemblies are distributed around the clamping assembly, installation sliding grooves are formed on the operation table at positions corresponding to each adjustment assembly, each adjustment assembly is slidingly installed in the corresponding installation sliding groove and moves along the sliding groove towards or away from the center position of the limiting ring.

[0007] A flatness detection assembly is arranged at the top of the operation table close to one side edge; the flatness detection assembly comprises a fixed seat, a bearing plate and a supporting frame which are arranged vertically, the fixed seat is fixed on the operation table, a cylinder is arranged at the top of the fixed seat, the bearing plate is vertically arranged at the top end of the cylinder, a first electric push rod is fixedly installed at the upper portion of the bearing plate, the supporting frame is fixedly installed at the end portion of the first electric push rod and is controlled to move horizontally by the first electric push rod, and a flatness detection mechanism is arranged on the supporting frame.

[0008] In a further technical solution of the application, the plurality of adjustment assemblies are uniformly distributed around the clamping assembly, each adjustment assembly comprises an installation rod and a correction plate, the installation rod is a vertical frame structure, a sliding block matched with the installation sliding groove is arranged at the bottom of the installation rod, each adjustment assembly is slidingly connected with the inside of the corresponding installation sliding groove through the sliding block, a hydraulic push rod is arranged on the inner wall of each installation sliding groove, the hydraulic push rod is fixed at one end of the installation sliding groove away from the clamping assembly, and the piston end of the hydraulic push rod is fixedly connected with the corresponding sliding block; two second dampers are arranged on the inner frame of each installation rod, the two second dampers are symmetrically arranged upward and downward, a second spring is fixedly sleeved on the outer surface of each second damper; two correction plates are arranged on each installation rod, the two correction plates are arranged at the adjacent ends of the two second dampers, the two correction plates are vertically arranged with the installation rod, and the plurality of correction plates horizontally extend towards the center of the limiting ring; one end of the two second springs on each installation rod away from the correction plate is connected with the installation rod.

[0009] The further technical scheme of the present application is that the flatness detection mechanism comprises a rotating plate and a measuring block arranged at the end of the rotating plate away from the bearing plate, the rotating plate is connected with the support frame in up-down rotation through a rotating shaft, two sealing tanks are symmetrically arranged on the end of the rotating plate away from the measuring block, the weight of the measuring block is much greater than the weight of the sealing tanks filled with the marking liquid, the two sealing tanks are fixed on the support frame through two groups of compression-resistant frames respectively, the first piston plates are slidably connected in the two sealing tanks, the push blocks are fixed on the outer surfaces of the two first piston plates, the outer surfaces of the two push blocks are movably penetrated to the outside of the two sealing tanks, the conveying pipes are fixedly connected to the outer surfaces of the two sealing tanks and extend to the measuring block, the measuring assemblies are arranged at the ends of the two conveying pipes located in the measuring block, and the two measuring assemblies are arranged in the corresponding measuring through holes in the bottom of the measuring block.

[0010] The preferable technical scheme of the present application is that the pressing assembly comprises two auxiliary plates, the two auxiliary plates are symmetrically fixed on the operation table, the positive and negative motors are fixedly installed on the top of the two auxiliary plates through screws, the output shafts of the two positive and negative motors are fixedly connected with the lead screws, the lifting plates are threadedly connected between the outer surfaces of the two lead screws, the pressure sensor is arranged on the top of the lifting plate, the sliding grooves are arranged on the outer surfaces of the two auxiliary plates, the two ends of the two lead screws are movably penetrated to the opposite inner walls of the two sliding grooves to the outside, the opposite outer surfaces of the lifting plate are slidably connected with the interiors of the two sliding grooves, and the pressing device body is arranged on the bottom of the lifting plate and located directly above the clamping assembly.

[0011] The preferable technical scheme of the present application is that the limiting rods are symmetrically arranged on the two sides of the first electric push rod, one end of each limiting rod is fixedly connected with the support frame, and the other end is slidably penetrated through the bearing plate and connected into one through the connecting rod, when the support frame is controlled to move horizontally by the first electric push rod, the limiting rods can be used for guiding and limiting.

[0012] The preferable technical scheme of the present application is that each clamping mechanism comprises an installation block, a second electric push rod and a clamping block, the installation block is fixed on the support base, the clamping block is located in the inner ring of the limiting ring, the second electric push rod is located between the installation and the limiting ring, is fixed on the inner wall of the installation block, and the piston rod thereof is fixedly connected with the clamping block through the limiting ring.

[0013] The preferred technical scheme of the present application is that two correction plates on each mounting rod are movably penetrated to the outside of the corresponding mounting rod from the end away from the clamping assembly and extend upward and downward to form L-shaped support plates; a piston control mechanism is arranged between the horizontal support plates of the two L-shaped support plates, the piston control mechanism comprises a negative pressure pump and two sets of piston mechanisms, a cavity is formed between the piston plates of the two sets of piston mechanisms, the gas inlet pipe and the gas outlet pipe of the negative pressure pump are both connected to the cavity, and valves are arranged on the outer surfaces of the gas inlet pipe and the gas outlet pipe of the negative pressure pump; the gas in the cavity is injected by the negative pressure pump to control the reverse movement of the two correction plates, or the gas in the cavity is sucked away by the negative pressure pump to control the opposite movement of the correction plates.

[0014] The preferred technical scheme of the present application is that the measuring assembly comprises a trapezoidal barrel fixed at the end of the conveying pipe, an auxiliary rod fixed on the inner wall of the trapezoidal barrel, a first damper arranged at the bottom of the auxiliary rod, and a flow-stopping ball fixedly arranged at the bottom end of the first damper; first springs are arranged on the outer surface of the first damper, one end of the first spring is fixedly connected with the outer surface of the auxiliary rod, and the other end is fixedly connected with the outer surface of the flow-stopping ball; the large end of the trapezoidal barrel faces the measuring through hole, the outer diameter of the flow-stopping ball is smaller than the large end of the trapezoidal barrel and the measuring through hole, and larger than the diameter of the middle upper part of the trapezoidal barrel, and the flow-stopping ball blocks the trapezoidal barrel in the normal state.

[0015] The preferred technical scheme of the present application is that each set of compression-resistant frame comprises two L-shaped supports symmetrically arranged on both sides of the sealed tank, and one end of the conveying pipe on the lower side penetrates to the upper part of the support frame and extends to the measuring block from above, and penetrates to the inside of the measuring block.

[0016] The preferred technical scheme of the present application is that a fixed rod is arranged outside each mounting rod, the fixed rod is located between the horizontal plate support plates of the two L-shaped support plates, two mounting brackets are fixedly connected to the outer surface of each mounting rod, and the fixed rod is fixed through the two mounting brackets; the two sets of piston mechanisms are symmetrically installed in the fixed rod in an up-down manner, each set of piston mechanism comprises a telescopic rod and a second piston plate, the second piston plates of the two sets of piston mechanisms are arranged adjacent to each other and form a cavity therebetween, and the two piston rods extend out of the two ends of the fixed rod from the ends away from the second piston plates and are fixed on the horizontal support plates of the L-shaped support plates on the corresponding sides.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] (1) in the process of mechanical detection of recycled concrete, first, the measuring block is moved to the top surface edge of the concrete, so that the measuring block and the support frame are kept horizontal, taking the place as the reference height, the first electric push rod is started, the measuring block is pushed to continue to move to the top surface of the concrete, when the top surface of the concrete block appears upward protrusion, the protrusion mark liquid can be marked at the place, when the top surface of the concrete block appears concave, the concave mark liquid can be marked at the place, so that the staff can accurately judge whether the top of the concrete block is in the flat state, and the problem that the concrete mechanical detection device in the prior art cannot detect the flatness of the top surface of the concrete and is easy to cause measurement error is solved.

[0019] (2) when the recycled concrete is placed in the inside of the limiting ring, the plurality of correction plates are moved to the position in contact with the center of the concrete block, the position of the concrete block is corrected through the up-down movement of the plurality of correction plates, so that the front, back, left and right surfaces of the concrete block are perpendicular to the top of the operation table, thereby improving the measurement accuracy in the later period.

[0020] (3) when the perpendicularity adjustment of the concrete block is completed, then the two second electric push rods are respectively started to be elongated, driving the two clamping blocks to respectively start to the center position of the limiting ring, so as to clamp and fix the concrete, through the fixation of the concrete block, the concrete block will not move in the later extrusion process, thereby improving the accuracy of the concrete mechanical detection result. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a front view of the present application;

[0022] Figure 2 It is a structure diagram of the clamping assembly in the present application;

[0023] Figure 3 It is an expanded diagram of the clamping assembly in the present application;

[0024] Figure 4 It is a three-dimensional structure diagram of the pressing assembly part in the present application;

[0025] Figure 5 It is a three-dimensional structure diagram of the operation table part in the present application;

[0026] Figure 6 It is a three-dimensional structure diagram of the adjusting assembly part in the present application;

[0027] Figure 7 It is a sectional view of the fixed rod part in the present application;

[0028] Figure 8 It is Figure 7 the enlarged view of A in the present application;

[0029] Figure 9 It is a structural schematic view of the flatness detection assembly of the present application;

[0030] Figure 10 It is a partial cross-sectional perspective view of the support frame part of the medium flatness detection assembly of the present application;

[0031] Figure 11 It is a partial cross-sectional perspective view of the conveying pipe part of the medium flatness detection assembly of the present application;

[0032] Figure 12 It is a partial cross-sectional perspective view of the conveying pipe part of the medium flatness detection assembly of the present application; Figure 11 It is an enlarged view at B.

[0033] In the figure: 1, support seat; 2, operation table; 3, clamping assembly; 300, support base; 301, limiting ring; 302, mounting block; 303, second electric push rod; 304, clamping block; 4, pressing assembly; 401, auxiliary support plate; 402, forward and reverse motor; 403, screw rod; 404, pressure sensor; 405, lifting plate; 406, sliding groove; 407, pressing device body; 5, mounting sliding groove; 6, adjusting assembly; 601, sliding block; 602, hydraulic push rod; 603, mounting rod; 604, second damper; 605, second spring; 606, correction plate; 607, mounting frame; 608, fixed rod; 609, telescopic rod; 610, cavity; 611, first piston plate; 612, fixed frame; 613, negative pressure pump; 614, valve; 615, L-shaped support plate; 7, flatness detection assembly; 701, fixed seat; 702, air cylinder; 703, bearing plate; 704, limiting rod; 705, first electric push rod; 706, measuring block; 707, support frame; 708, rotating shaft; 709, rotating plate; 710, compression-resistant frame; 711, sealed tank; 712, first piston plate; 713, push block; 714, conveying pipe; 715, trapezoidal barrel; 716, auxiliary rod; 717, first damper; 718, first spring; 719, flow-stopping ball. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0035] The device for detecting mechanical properties of recycled concrete provided by the embodiments improves the detection accuracy. Figure 1As shown, including support seat 1, the top of support seat 1 is fixed with operation table 2, the top of support seat 1 is provided with pressing assembly 4, the top of operation table 2 is provided with clamping assembly 3 near the center, and the top of operation table 2 is provided with flatness detection assembly 7 near one side edge. As Figure 1 And Figure 4 , the pressing assembly 4 comprises two auxiliary support plates 401, the two auxiliary support plates 401 are symmetrically fixed on the operation table 2, the top of each of the two auxiliary support plates 401 is fixedly provided with a reversible motor 402 through a screw, the output shaft of each of the two reversible motors 402 is fixedly connected with a lead screw 403, the outer surfaces of the two lead screws 403 are threadedly connected with a lifting plate 405, the top of the lifting plate 405 is provided with a pressure sensor 404, the outer surfaces of the two auxiliary support plates 401 are each provided with a sliding groove 406, the two ends of the two lead screws 403 are respectively movably penetrated to the opposite inner walls of the two sliding grooves 406 to the outside, the opposite outer surfaces of the lifting plate 405 are respectively slidably connected with the interiors of the two sliding grooves 406, the lifting plate 405 can move up and down along the two auxiliary support plates 401 under the action of the two reversible motors 402, and the bottom of the lifting plate 405 is provided with a pressing device body 407, the pressing device body 407 is used for pressing the concrete block to detect the mechanical property.

[0036] The embodiment provides a regenerated concrete mechanical property detection device for improving detection accuracy, which comprises Figure 1 、 Figure 8 And Figure 10As shown, the flatness detection assembly 7 comprises a fixed seat 701, a bearing plate 703 and a support frame 707 arranged perpendicular to each other, the fixed seat 701 is fixed on the operation table 2, a gas cylinder 702 is arranged at the top of the fixed seat 701, the bearing plate 703 is vertically arranged at the top end of the gas cylinder 702, a first electric push rod 705 is fixedly installed at the upper part of the bearing plate 703, the support frame 707 is fixedly installed at the end of the first electric push rod 705, the support frame 707 is controlled to move horizontally through the first electric push rod 705, and the limiting rods 704 are symmetrically arranged on both sides of the first electric push rod 705, one end of the two limiting rods 704 is fixedly connected with the support frame 707, the other end of the two limiting rods 704 slides through the bearing plate 703 and is connected into one through the connecting rod, and when the support frame 707 is controlled to move horizontally through the first electric push rod 705, the limiting rods 704 can be used for guiding and limiting.The support frame 707 is provided with a flatness detection mechanism, which comprises a rotating plate 709 and a measuring block 706 provided at one end of the rotating plate 709 away from the bearing plate 703, the rotating plate 709 is connected with the support frame 707 in up-down rotation through a rotating shaft 708, two sealed tanks 711 are symmetrically provided on the one end of the rotating plate 709 away from the measuring block 706, the weight of the measuring block 706 is much greater than that of the sealed tanks 711 filled with marking liquid, the two sealed tanks 711 are fixed on the support frame 707 through two groups of compression-resistant frames 710 respectively, each group of compression-resistant frames 710 comprises two L-shaped supports symmetrically provided on both sides of the sealed tank 711; the first piston plate 712 is slidably connected in the two sealed tanks 711 respectively, the push block 713 is fixed on the outer surface of the two first piston plates 712 respectively, the outer surfaces of the two push blocks 713 are movably penetrated to the outside of the two sealed tanks 711 respectively, the conveying pipes 714 are fixedly and communicatively arranged on the outer surfaces of the two sealed tanks 711, the other ends of the two conveying pipes 714 extend to the measuring block 706, one end of the lower conveying pipe 714 penetrates to the upper part of the support frame 707 and extends to the measuring block 706 from above, the two conveying pipes 714 penetrate to the inside of the measuring block 706, the measuring assemblies are arranged at the ends of the two conveying pipes 714 in the measuring block 706, the two measuring through holes are formed in the bottom of the measuring block 706, the trapezoidal barrel 715 is fixed on the end of the conveying pipe 714, the auxiliary rod 716 is fixed on the inner wall of the trapezoidal barrel 715, the first damper 717 is arranged at the bottom of the auxiliary rod 716, and the flow-stopping ball 719 is fixedly arranged at the bottom end of the first damper 717, the first spring 718 is arranged on the outer surface of the first damper 717, one end of the first spring 718 is fixedly connected with the outer surface of the auxiliary rod 716, and the other end is fixedly connected with the outer surface of the flow-stopping ball 719, the large end of the trapezoidal barrel 715 faces the measuring through hole, and the diameters of the large end of the trapezoidal barrel 715 and the measuring through hole are slightly greater than the outer diameter of the flow-stopping ball 719, the outer diameter of the flow-stopping ball 719 is greater than the diameter of the upper part of the trapezoidal barrel 715, and the flow-stopping ball 719 is blocked by the first damper 717 and the first spring 718.

[0037] In the embodiment, in the process of mechanical detection of the recycled concrete, first, the concrete to be detected is placed inside the limiting ring 301, and then the specific position of the concrete is adjusted by the adjusting assembly 6, so that it remains perpendicular to the top of the operation table 2, realizing the automatic adjustment of the position of the concrete block by the concrete mechanical detection device. Then the concrete can be fixed on the top of the operation table 2 by the clamping assembly 3, and then the air cylinder 702 is started to be elongated or shortened, driving the bottom of the measuring block 706 to rise to the top of the concrete block, and then the first electric push rod 705 is started to be elongated, driving the measuring block 706 to move to the top edge of the concrete, so that the measuring block 706 remains horizontal with the support frame 707. Take this place as the reference height, start the first electric push rod 705 to be elongated, drive the measuring block 706 to continue to move to the top surface of the concrete. At this time, when the concrete block appears upward convex, under the action of the rotating plate 709, it will drive the measuring block 706 to rotate upward. The side adjacent to the measuring block 706 of the rotating plate 709 rotates upward, and the end provided with the sealing tank 711 rotates downward, thereby extruding the push block 713 located on the lower side, driving the first piston plate 712 located on the lower side to move downward, so that the marker liquid placed in the sealing tank 711 on the lower side enters the inside of the delivery pipe 714 connected therewith under the action of pressure, enters the inside of the trapezoidal barrel 715 through the delivery pipe 714, and presses downward on the flow stopping ball 719, so that the first spring 718 connected with the flow stopping ball 719 is elongated, driving the flow stopping ball 719 to move downward. Among them, if the concrete block does not appear upward convex, the first spring 718 connected with the flow stopping ball 719 is in a state of being compressed, and the flow stopping ball 719 is in a state of being pressed upward by the first spring 718. Figure 11As shown, the outer diameter of the flow stopping ball 719 is greater than the inner diameter of the upper part of the trapezoidal barrel 715, and the inner diameter of the lower part of the trapezoidal barrel 715, when the flow stopping ball 719 and the inner wall of the trapezoidal barrel 715 form a gap, the marking liquid can flow out from the gap between the flow stopping ball 719 and the trapezoidal barrel 715 to the surface of the concrete block to mark. When the top surface of the concrete block is concave, the measuring block 706 will move downward under the action of gravity, wherein the measuring block 706 is made of heavy metal iron and its weight is much greater than that of the two sealed tanks 711, when the top surface of the concrete block is concave, the measuring block 706 will rotate downward under its own gravity, so that the rotating plate 709 on the same side as the sealed tank 711 rotates upward, so that the upper push block 713 provides an upward thrust to the upper first piston plate 712, so that the upper first piston plate 712 pushes the marking liquid in the upper sealed tank 711 upward, through the connecting pipe 714 into the trapezoidal barrel 715 inside, so that the flow stopping ball 719 inside is extruded, so that the marking liquid representing the concave surface of the concrete drops on the top of the concrete, wherein the marking liquids in the two sealed tanks 711 are different in color, and through different colors of marking, workers can see the specific position of the concave and convex surface of the concrete, which is convenient for later use of external polishing equipment to polish the surface of the concrete to be flat. Through the action of the flatness detection assembly 7, workers can observe whether the top of the concrete block is in a flat state, if the top plane of the concrete block is not flat, different marking liquids in the flatness detection assembly 7 can be used for marking, which is convenient for later polishing treatment, solving the problem that the concrete mechanics detection device in the prior art cannot detect the flatness of the top surface of the concrete block, which is prone to cause large measurement error.

[0038] The regeneration concrete mechanics performance detection device provided in the embodiment can improve the detection accuracy. Figure 2 and Figure 3 As shown, the clamping assembly 3 is located directly below the pressing device body 407, the clamping assembly 3 comprises a supporting base 300, a limiting ring 301 and two sets of clamping mechanisms symmetrically arranged on the limiting ring 301, the supporting base 300 is fixed on the operation table 2, and the limiting ring 301 is arranged on the supporting base 300; each set of clamping mechanisms comprises a mounting block 302, a second electric push rod 303 and a clamping block 304, the mounting block 302 is fixed on the supporting base 300, the clamping block 304 is located in the inner ring of the limiting ring 301, and the second electric push rod 303 is located between the mounting block 302 and the limiting ring 301 and is fixed on the inner wall of the mounting block 302, and the piston rod thereof is fixedly connected with the clamping block 304 through the limiting ring 301. Figure 5As shown, the operation table 2 is provided with four sets of adjusting assemblies 6, which are uniformly distributed around the clamping assembly 3. Installation sliding grooves 5 are formed on the operation table 2 at positions corresponding to the installation positions of each set of adjusting assemblies 6. The four installation sliding grooves 5 are radially distributed around the center of the limiting ring 301. Each installation sliding groove 5 is in the shape of a strip. The four sets of adjusting assemblies 6 are respectively slidably installed in the corresponding installation sliding grooves 5.

[0039] In the embodiment, as shown in Figure 1 and Figure 5 、 Figure 6As shown, each adjusting assembly 6 comprises a mounting rod 603 which is a vertical frame structure, and a correction plate 606, the bottom of the mounting rod 603 is provided with a sliding block 601 matched with the mounting sliding groove 5, four adjusting assemblies 6 are respectively connected with the inner part of the four mounting sliding grooves 5 through the sliding blocks 601, the inner wall of the four mounting sliding grooves 5 is provided with a hydraulic push rod 602, each hydraulic push rod 602 is fixed at the end of the mounting sliding groove 5 away from the clamping assembly 3, and the piston end is fixedly connected with the corresponding sliding block 601. The inner frame of each mounting rod 603 is provided with two second dampers 604, the two second dampers 604 are symmetrically arranged upward and downward, and the outer surface of each second damper 604 is fixedly provided with a second spring 605; each mounting rod 603 is provided with two correction plates 606, the two correction plates 606 are arranged at the adjacent ends of the two second dampers 604, and the two correction plates 606 are arranged perpendicularly to the mounting rod 603; all the correction plates 606 on the four mounting rods 603 extend towards the center of the limiting ring 301; the ends of the two second springs 605 on each mounting rod 603 away from the correction plate 606 are in the mounting rod 603. The ends of the two correction plates 606 on each mounting rod 603 away from the clamping assembly 3 are movably penetrated to the outside of the corresponding mounting rod 603, and extend upward and downward respectively to form L-shaped support plates 615; a fixed rod 608 is arranged outside each mounting rod 603, and the fixed rod 608 is located between the horizontal plate support plates of the two L-shaped support plates 615; two mounting racks 607 are fixedly connected to the outer surface of each mounting rod 603, and the fixed rod 608 is fixed through the two mounting racks 607. Two groups of piston mechanisms are arranged in each fixed rod 608, and the two groups of piston mechanisms are symmetrically distributed upward and downward on the center of the fixed rod 608, each group of piston mechanisms comprises a telescopic rod 609 and a second piston plate 611, the second piston plates 611 of the two groups of piston mechanisms are arranged adjacent to each other, a cavity 610 is arranged between the two second piston plates 611, and the two piston rods 609 extend out of the two ends of the fixed rod 608 respectively, and are fixed on the horizontal support plates of the L-shaped support plates 615 on the corresponding side. A negative pressure pump 613 is arranged outside the cavity 610 of each fixed rod 608, the negative pressure pump 613 is fixed on the two mounting racks 607 of each mounting rod 603 through a mounting rack 612, one end of the air inlet pipe and the air outlet pipe of the negative pressure pump 613 respectively leads to the inside of the corresponding cavity 610, and a valve 614 is arranged on the outer surface of the air inlet pipe and the air outlet pipe of each negative pressure pump 613.

[0040] In this embodiment, when the recycled concrete is placed inside the limiting ring 301, first start the four hydraulic push rods 602 to extend, respectively drive multiple correction plates 606 to move towards the center position of the limiting ring 301 at the same time, move to contact with the outer surface of the middle part of the concrete block, when the concrete block is not inclined, the positions of the four groups of correction plates 606 contacting with the concrete block are in the same plane, at this time the four groups of correction plates 606 just clamp the concrete block; when the concrete block is in an inclined state, the four negative pressure pumps 613 can be started to adjust the concrete block; the specific adjustment process is: when the concrete block is inclined, the concrete block will be inclined to a certain direction, start the four negative pressure pumps 613, open the valve 614 on the surface of the air inlet pipe, and transport gas into the cavity 610, under the action of the pressure of the gas, the two second piston plates 611 in each fixed rod 608 move away from each other, respectively, so that the telescopic rods 609 on the upper and lower sides move in opposite directions along the concrete block, thereby driving multiple correction plates 606 on the upper and lower sides to move, in the moving process, one of the correction plates 606 on the inclined side will slowly push the concrete block outward, until the contact surface of the correction plate 606 and the concrete is completely horizontal. For example, when the concrete block is inclined to the left, during the upward movement of the two correction plates on the left side, the lower correction plate moves away from the concrete block, and the upper correction plate is in close contact with the outer surface of the concrete block, giving the concrete block a rightward pushing force, thereby righting the concrete block. Each pair of correction plates 606 respectively corrects the two sides of the concrete block, and through the movement of the four groups of correction plates 606, the left and right, front and back positions of the concrete block are perpendicular to the top of the operation table 2, through the action of the adjusting assembly 6, the complete perpendicularity between the concrete block and the operation table 2 is realized, thereby improving the measurement accuracy in the later stage, then respectively start the two second electric push rods 303 to extend, respectively drive the two clamping blocks 304 to start towards the center position of the limiting ring 301, thereby clamping and fixing the concrete, then start the four hydraulic push rods 602 to shorten, thereby moving the four adjusting assemblies 6 away from the concrete block, preventing the concrete block from being pressed in the later stage. Then the flatness detection assembly 7 detects the flatness of the top surface of the concrete, when the flatness of the top surface of the concrete block reaches the required standard, start the two positive and negative motors 402 to drive the two lead screws 403 to rotate, thereby driving the lifting plate 405 to move downward, thereby driving the pressing device body 407 to move downward, and pressing the concrete block, then the pressure sensor 404 detects the pressure value, thereby obtaining the mechanical properties of the recycled concrete.

[0041] The method for using the device and the working principle are as follows: in the process of mechanical detection of the recycled concrete, first, the concrete to be detected is placed in the inside of the limiting ring 301, four hydraulic push rods 602 are started first to be elongated to drive a plurality of correction plates 606 to move to the position in contact with the center of the concrete block, then four negative pressure pumps 613 are started, and the valve 614 on the surface of the air inlet pipe is opened to convey gas into the inside of the cavity 610, under the action of the pressure of the gas, two second piston plates 611 in each fixed rod 608 move away from each other, so that the telescopic rods 609 on the upper and lower sides move in the opposite directions along the concrete block, thereby driving a plurality of correction plates 606 on the upper and lower sides to move, when the concrete is inclined, one of the correction plates 606 will slowly push the concrete block outward until the contact surface of the correction plate 606 and the concrete is completely horizontal, each pair of opposite correction plates 606 corrects the two sides of the concrete block respectively, through the movement of the four correction plates 606, so that the left and right and front and back positions of the concrete block are perpendicular to the top of the operation table 2, the automatic debugging of the concrete block position by the concrete mechanical detection device is realized, then two second electric push rods 303 are started to be elongated to drive two clamping blocks 304 to start towards the center position of the limiting ring 301, so as to clamp and fix the concrete, then the four hydraulic push rods 602 are started again to be shortened, so that the four adjusting assemblies 6 can move away from the position of the concrete block, then the air cylinder 702 is started to be elongated or shortened to drive the bottom of the measuring block 706 to rise to the top of the concrete block, then the first electric push rod 705 is started to be elongated to drive the measuring block 706 to move to the edge of the top surface of the concrete, so that the measuring block 706 and the support frame 707 are kept horizontal, taking the position as the reference height, the first electric push rod 705 is started to be elongated to drive the measuring block 706 to continue to move to the top surface of the concrete, at this time, when the concrete block appears to be convex upward, it will drive the measuring block 706 to rotate upward, thereby driving the side adjacent to the measuring block 706 of the rotating plate 709 to rotate upward and the side adjacent to the sealing tank 711 to rotate downward, so as to extrude the push block 713 on the lower side, drive the first piston plate 712 on the lower side to move downward, so that the marker liquid placed in the sealing tank 711 on the lower side enters the inside of the conveying pipe 714 under the action of the pressure, enters the inside of the trapezoidal barrel 715 through the conveying pipe 714, presses downward the flow stopping ball 719, so that the first spring 718 connected with the flow stopping ball 719 is elongated to drive the flow stopping ball 719 to move downward, the marker liquid can flow out from the gap between the flow stopping ball 719 and the trapezoidal barrel 715 to the surface of the concrete block for marking, when the top surface of the concrete block is concave, the measuring block 706 will move downward under the action of the gravity,Thus, the rotating plate 709 rotates upward on the same side as the sealing tank 711, and an upward pushing force is applied to the pushing block 713 on the upper part, so that the first piston plate 712 on the upper part pushes the marking liquid in the sealing tank 711 on the upper part to move upward, and the marking liquid enters the trapezoidal barrel 715 inside through the conveying pipe 714 connected thereto, so that the flow-stopping ball 719 inside is extruded, and the marking liquid droplets representing the concave surface of the concrete are dropped on the top of the concrete. The colors of the marking liquids in the two sealing tanks 711 are different, and the specific positions of the concave and convex surfaces of the concrete can be determined by the marking liquids of different colors. When the flatness of the top surface of the concrete block reaches the required standard, the two reversible motors 402 are started to drive the two lead screws 403 to rotate, and then drive the lifting plate 405 to move downward, so as to drive the pressing device body 407 to move downward and press the concrete block. Then, the pressure value applied is detected by the pressure sensor 404, and the mechanical properties of the recycled concrete are obtained.

[0042] The wiring diagram of the second electric push rod 303, the reversible motor 402, the pressure sensor 404, the negative pressure pump 613, the air cylinder 702 and the first electric push rod 705 in the present application belongs to the common knowledge in the art, and the working principle is a known technology. The model is selected according to the actual use, so the control mode and wiring arrangement of the second electric push rod 303, the reversible motor 402, the pressure sensor 404, the negative pressure pump 613, the air cylinder 702 and the first electric push rod 705 are not explained in detail.

[0043] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A device for testing the mechanical properties of recycled concrete to improve testing accuracy, comprising a support base (1), an operating table (2) fixed on the top of the support base (1), and a pressing component (4) provided above the operating table (2), characterized in that: A clamping assembly (3) is provided near the center of the top of the operating table (2). The clamping assembly (3) is located directly below the pressing assembly (4). It includes a support base (300), a limiting ring (301), and two sets of clamping mechanisms symmetrically arranged on the limiting ring (301). The support base (300) is fixed on the operating table (2), and the limiting ring (301) is mounted on the support base (300). A working position for placing the recycled concrete block to be tested is formed inside the limiting ring (301). The operating table (2) is provided with multiple sets of adjustment assemblies (6). The multiple sets of adjustment assemblies (6) are distributed around the clamping assembly (3). An installation groove (5) is provided on the operating table (2) corresponding to the installation position of each set of adjustment assemblies (6). Each set of adjustment assemblies (6) is slidably installed in the corresponding installation groove (5) and moves along the groove (5) toward the center position of the limiting ring (301) or away from the center position of the limiting ring (301). A flatness detection component (7) is set at the top of the operating table (2) near one side edge; the flatness detection component (7) includes a fixed seat (701), a bearing plate (703) arranged perpendicularly to each other and a support frame (707). The fixed seat (701) is fixed on the operating table (2). A cylinder (702) is set at the top of the fixed seat (701). The bearing plate (703) is vertically set at the top of the cylinder (702). A first electric push rod (705) is fixedly installed on the upper part of the bearing plate (703). The support frame (707) is fixedly installed at the end of the first electric push rod (705) and the support frame (707) is controlled to move horizontally by the first electric push rod (705). A flatness detection mechanism is set on the support frame (707).

2. The device for testing the mechanical properties of recycled concrete to improve testing accuracy according to claim 1, characterized in that: Multiple sets of adjustment components (6) are evenly distributed around the clamping component (3). Each set of adjustment components (6) includes a mounting rod (603) and a straightening plate (606). The mounting rod (603) is a vertical frame structure. A slider (601) matching the mounting groove (5) is provided at the bottom of the mounting rod (603). Each set of adjustment components (6) is slidably connected to the interior of the corresponding mounting groove (5) through the slider (601). A hydraulic push rod (602) is provided on the inner wall of each mounting groove (5). Each hydraulic push rod (602) is fixed at the end of the mounting groove (5) away from the clamping component (3), and its piston end is fixedly connected to the corresponding slider (601). Each mounting rod ( The inner frame of 603 is provided with two second dampers (604), which are arranged symmetrically in the upper and lower positions. A second spring (605) is fixedly sleeved on the outer surface of each second damper (604). Each mounting rod (603) is provided with two straightening plates (606), which are respectively set at the adjacent ends of the two sets of second dampers (604). Both straightening plates (606) are perpendicular to the mounting rod (603), and multiple straightening plates (606) extend horizontally toward the center of the limiting ring (301). The ends of the two second springs (605) on each mounting rod (603) away from the straightening plates (606) are inside the mounting rod (603).

3. A device for testing the mechanical properties of recycled concrete to improve testing accuracy according to claim 1 or 2, characterized in that: The flatness testing mechanism includes a rotating plate (709) and a measuring block (706) disposed at the end of the rotating plate (709) away from the bearing plate (703). The rotating plate (709) is rotatably connected to the support frame (707) via a rotating shaft (708). Two sealed containers (711) are symmetrically arranged vertically at the end of the rotating plate (709) away from the measuring block (706). The weight of the measuring block (706) is much greater than the weight of the two sealed containers (711) containing the marking liquid. The two sealed containers (711) are fixed to the support frame (707) by two sets of pressure-resistant frames (710). The contents of the two sealed containers (711) are... Each part is slidably connected to a first piston plate (712). Push blocks (713) are fixed on the outer surfaces of the two first piston plates (712). The outer surfaces of the two push blocks (713) respectively extend through to the outside of the two sealed cans (711). The outer surfaces of the two sealed cans (711) are fixedly connected to a conveying pipe (714). The other end of the two conveying pipes (714) extends to the measuring block (706). A measuring component is provided at the end of the two conveying pipes (714) located at the measuring block (706). Two measuring through holes are opened at the bottom of the measuring block (706). The two sets of measuring components are located in the corresponding measuring through holes.

4. A device for testing the mechanical properties of recycled concrete to improve testing accuracy according to claim 1 or 2, characterized in that: The pressing assembly (4) includes two auxiliary plates (401). The two auxiliary support plates (401) are symmetrically fixed on the operating table (2). A forward and reverse motor (402) is fixedly installed on the top of each of the two auxiliary plates (401) by screws. The output shafts of the two forward and reverse motors (402) are fixedly connected to lead screws (403). A lifting plate (405) is threaded between the outer surfaces of the two lead screws (403). A pressure transmission is provided on the top of the lifting plate (405). The sensor (404) and the outer surfaces of the two auxiliary plates (401) are provided with grooves (406). The two ends of the two lead screws (403) respectively move through the opposite inner walls of the two grooves (406) to the outside. The opposite outer surfaces of the lifting plate (405) are slidably connected to the inside of the two grooves (406). The bottom of the lifting plate (405) is provided with a pressing device body (407), which is located directly above the clamping assembly (3).

5. A device for testing the mechanical properties of recycled concrete to improve testing accuracy according to claim 1 or 2, characterized in that: Limiting rods (704) are symmetrically provided on both sides of the first electric actuator (705). One end of the two limiting rods (704) is fixedly connected to the support frame (707), and the other end slides through the bearing plate (703) and is connected as a whole by a connecting rod. When the first electric actuator (705) controls the support frame (707) to move horizontally, the limiting rods (704) can guide and limit the movement.

6. A device for testing the mechanical properties of recycled concrete to improve testing accuracy according to claim 1 or 2, characterized in that: Each clamping mechanism includes a mounting block (302), a second electric push rod (303), and a clamping block (304). The mounting block (302) is fixed on the support base (300), the clamping block (304) is located on the inner ring of the limiting ring (301), and the second electric push rod (303) is located between the mounting block (302) and the limiting ring (301), fixed on the inner wall of the mounting block (302), and its piston rod passes through the limiting ring (301) and is fixedly connected to the clamping block (304).

7. A device for testing the mechanical properties of recycled concrete to improve testing accuracy according to claim 2, characterized in that: Two straightening plates (606) on each mounting rod (603) extend from the end away from the clamping assembly (3) to the outside of the corresponding mounting rod (603), and extend upward and downward respectively to form L-shaped support plates (615); a piston control mechanism is provided between the horizontal support plates of the two L-shaped support plates (615). The piston control mechanism includes a negative pressure pump (613) and two sets of piston mechanisms. A cavity (610) is formed between the piston plates of the two sets of piston mechanisms. The air inlet pipe and the air outlet pipe of the negative pressure pump (613) are both connected to the cavity (610). Valves (614) are provided on the outer surface of the air inlet pipe and the air outlet pipe of the negative pressure pump (613). Gas is injected into the cavity (610) by the negative pressure pump (613) to control the two straightening plates (606) to move in opposite directions, or the gas in the cavity (610) is drawn away by the negative pressure pump (613) to control the straightening plates (606) to move towards each other.

8. The device for testing the mechanical properties of recycled concrete to improve testing accuracy according to claim 3, characterized in that: The measuring assembly includes a trapezoidal barrel (715) fixed to the end of the delivery pipe (714), an auxiliary rod (716) fixed to the inner wall of the trapezoidal barrel (715), a first damper (717) set at the bottom of the auxiliary rod (716), and a flow-stopping ball (719) fixed at the bottom of the first damper (717). A first spring (718) is provided on the outer surface of the first damper (717). One end of the first spring (718) is fixedly connected to the outer surface of the auxiliary rod (716), and the other end is fixedly connected to the outer surface of the flow-stopping ball (719). The large end of the trapezoidal barrel (715) faces the measuring through hole, and the outer diameter of the flow-stopping ball (719) is smaller than the large end of the trapezoidal barrel (715) and the measuring through hole, and larger than the middle and upper diameter of the trapezoidal barrel (715). Under normal conditions, the flow-stopping ball (719) blocks the trapezoidal barrel (715).

9. A device for testing the mechanical properties of recycled concrete to improve testing accuracy according to claim 3, characterized in that: Each set of pressure-resistant frames (710) includes two L-shaped supports symmetrically arranged on both sides of the sealed tank (711). One end of the delivery pipe (714) located on the lower side passes through the upper part of the support frame (707) and extends from the top to the measuring block (706), both of which pass through the interior of the measuring block (706).

10. A device for testing the mechanical properties of recycled concrete to improve testing accuracy according to claim 7, characterized in that: A fixing rod (608) is provided on the outside of each mounting rod (603). The fixing rod (608) is located between the horizontal support plates of the two L-shaped support plates (615). Two mounting brackets (607) are fixedly connected to the outer surface of each mounting rod (603). The fixing rod (608) is fixed by the two mounting brackets (607). Two sets of piston mechanisms are symmetrically installed in the fixing rod (608). Each set of piston mechanisms includes a telescopic rod (609) and a second piston plate (611). The second piston plates (611) of the two sets of piston mechanisms are arranged adjacent to each other and form a cavity (610) between the two second piston plates (611). The ends of the two piston rods (609) away from the second piston plate (611) extend from both ends of the fixing rod (608) and are fixed on the horizontal support plates of the L-shaped support plates (615) on the corresponding sides.

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