Portable building concrete strength detection device

Abstract

The application provides a portable building concrete strength detection device, and relates to the technical field of concrete detection. The detection device comprises a support frame component, a detection table component, a load application assembly, a damage feature detection mechanism and a longitudinal driving component. The damage feature detection mechanism comprises a detection mounting ring body, an upper fixed ring, a circumferentially distributed bulging detection part and a crack scanner, and is driven by the longitudinal driving component to move longitudinally along the outer wall of the core sample. A rotary transmission assembly drives the detection mounting ring body to rotate forward and backward alternately during movement, so that the bulging detection part comprehensively senses diameter changes, and the crack scanner scans surface cracks. The application accurately determines the concrete strength by comprehensively detecting multiple damage features such as pressure bulging and crack expansion, and recording the load, solves the problems of large error and incomplete feature recognition in traditional single-point detection, and has the advantages of portability, high efficiency and high detection precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete detection, and particularly relates to a portable building concrete strength detection device. BACKGROUND

[0002] Concrete refers to engineering composite materials that are formed by cementing aggregates into a whole by cementitious materials, and concrete is a main building material and is widely used in modern building engineering, and the performance of the concrete directly affects the safety of the building, and one of main indexes of the quality of the concrete is the compressive strength, and the compressive strength directly affects the resistance of the concrete, and in the building process, the compressive strength and other performance indexes of the concrete need to be tested by some detection devices.

[0003] The existing concrete strength detection is mainly performed by using a rebound method or a coring method, but the rebound method is greatly affected by the surface state and has low precision, and the coring method needs to be tested by a laboratory press machine, and the equipment is bulky and cannot be used for real-time determination on site, although some portable pressure devices can be used for on-site pressurization, but only a single load value is used for determining the damage, and the dynamic monitoring of typical damage characteristics such as bulging and cracking is ignored, and misjudgment is easily caused. In addition, the scanning of the traditional detection device on the circumferential surface of the core sample is not comprehensive, and it is difficult to capture local damage characteristics. SUMMARY

[0004] The present application aims to provide a portable building concrete strength detection device to solve the technical problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme.

[0006] The portable building concrete strength detection device comprises a support frame component, a detection table component for carrying a core sample body and a load applying assembly for applying a detection load to the core sample body from the top; the support frame component is composed of a chassis part, a side plate type frame body and a top frame part, the detection table component is arranged on the chassis part and the side plate type frame body connects the chassis part and the top frame part into an integrated body; the load applying assembly is arranged on the top frame part and is aligned with the center of the detection table component, further comprising a damage feature detection mechanism and a longitudinal driving component, the damage feature detection mechanism comprises a detection mounting ring body, an upper fixed ring, a bulging detection part, a main frame part and a rotary transmission assembly, the detection mounting ring body is located directly below the load applying assembly and can be sleeved outside the core sample body in the center of the detection table component, the upper fixed ring is rotationally arranged on the upper part of the detection mounting ring body and one side of the upper fixed ring is connected with the longitudinal driving component through the main frame part, and the longitudinal driving component is used for driving the main frame part to move longitudinally along the side plate type frame body; the rotary transmission assembly is arranged on the main frame part, one end of the rotary transmission assembly is connected with the outer wall of the detection mounting ring body and the other end is connected with the side plate type frame body, when the rotary transmission assembly moves longitudinally along with the main frame part, the side plate type frame body acts on the rotary transmission assembly and drives the detection mounting ring body to rotate in the positive and negative directions alternately through the rotary transmission assembly; the bulging detection parts are distributed circumferentially on the outer wall of the detection mounting ring body, and the end part of the bulging detection part pointing to the center of the detection mounting ring body can contact the outer wall of the core sample body in a rolling manner, and the inner wall of the detection mounting ring body is further provided with a plurality of circumferentially distributed crack scanners, and the crack scanners are used for scanning the crack condition of the surface of the core sample body.

[0007] On the basis of the above technical scheme, the application further provides the following optional technical schemes:

[0008] In an optional scheme, a driven incomplete rack opposite to the main frame part is arranged on the outer wall of the detection mounting ring body, the rotary transmission assembly comprises a rotary guide part and a rotary follower part, the rotary guide part is arranged on the main frame part and one end thereof is connected with the side plate type frame body, the rotary follower part comprises a rotary sleeve, a driven branch arm and an umbrella gear part, the rotary sleeve is rotationally connected with the main frame part through a rotary shaft, the outer wall of the rotary sleeve is connected with the rotary guide part, when the rotary guide part moves longitudinally along with the main frame part, the side plate type frame body acts on the rotary sleeve through the rotary guide part to make the rotary sleeve rotate around the connection with the main frame part; one end of the driven branch arm is fixedly connected with the rotary sleeve and the other end is provided with the umbrella gear part, the center of the umbrella gear part is coincided with the center line of the rotary sleeve, and the umbrella gear part is engaged with the driven incomplete rack.

[0009] In an alternative: the side plate type frame body has a wave-shaped guide groove on the side wall facing the destruction feature detection mechanism, the rotating sleeve circumferential surface has a driven gear body, the rotating guide part includes a rotating rack part, a follow-up roller and a mounting sliding block, the rotating rack part is located on the side of the rotating sleeve and is engaged with the driven gear body, the rotating rack part is slidingly fitted with the umbrella-shaped gear part and the side of the main frame part, one end of the follow-up roller is rotatably connected with the side of the rotating rack part around its own axis, and the other end extends into the guide groove.

[0010] In an alternative: the bulge detection part includes a hollow insertion rod member and a rolling contact part, the hollow insertion rod member penetrates the detection mounting ring body in the radial direction, and the end of the hollow insertion rod member pointing to the center of the detection mounting ring body has an elastic load cell, and the rolling contact part is mounted on the end of the elastic load cell.

[0011] In an alternative: the lower end of the detection mounting ring body has a lower adjusting ring assembly, the hollow insertion rod member is slidingly fitted with the detection mounting ring body in the radial direction, and the outer end of the hollow insertion rod member has a lower driven rod, the lower adjusting ring assembly includes a lower adjusting rotating ring and an adjusting drive unit, the lower adjusting rotating ring is rotatably fitted with the bottom of the detection mounting ring body, and the circumferential outer wall of the lower adjusting rotating ring has a plurality of arc-shaped action slides corresponding to the bulge detection part, the end of the lower driven rod away from the hollow insertion rod member extends into the corresponding arc-shaped action slide and is slidingly fitted with the arc-shaped action slide in a rolling manner, and the adjusting drive unit is arranged on the side of the detection mounting ring body and is connected with the side wall of the lower adjusting rotating ring, and the adjusting drive unit is used to drive the lower adjusting rotating ring to rotate relative to the detection mounting ring body.

[0012] In an alternative: the outer wall of the detection mounting ring body has a fixing seat, the adjusting drive unit includes a radial outer rod frame and an adjusting screw, the radial outer rod frame is provided with a slidable sliding seat part, the adjusting screw spirally penetrates the fixing seat, one end of the adjusting screw has a rotating head part rotatably fitted therewith, and the outer wall of the mounting sliding block is provided with a movable connection part which is rotatably fitted with the top of the sliding seat part.

[0013] In an alternative: the detection table part includes an outer disc part, an inner support table, a positioning operation unit and a plurality of positioning units, the outer disc part is fixed on the upper end face of the bottom disc part and is hollow inside, a plurality of upper radial through openings are formed in the upper end face of the outer disc part and are uniformly distributed in the circumferential direction, the inner support table is arranged at the center of the outer disc part and is used to support the core sample main body, the plurality of positioning units are slidingly installed inside the upper radial through openings in correspondence, the positioning operation unit is arranged inside the outer disc part and is connected with the bottoms of the plurality of positioning units, and one end of the positioning operation unit extends out from the side through opening.

[0014] In an alternative: the positioning unit comprises a positioning clamp block, a positioning sliding seat and a positioning extension rod, the positioning sliding seat is slidingly arranged inside the upper radial through hole and is connected with the end wall of the upper radial through hole through a return spring, the positioning clamp block is fixed on the positioning sliding seat and extends towards the center of the inner supporting table at one end, and the positioning extension rod is fixed on the bottom of the positioning sliding seat; the positioning operation unit comprises a positioning turntable part and a lever part, the positioning turntable part is rotationally arranged inside the outer disc part, the lever part is fixed on the edge of the positioning turntable part and extends out from the side through hole, the end face of the positioning turntable part is provided with a plurality of pushing arc grooves, the center of the pushing arc grooves is staggered with the center of the positioning turntable part, and the end of the positioning extension rod away from the positioning sliding seat extends into the corresponding pushing arc groove.

[0015] In an alternative: the load applying assembly comprises a load applying cylinder part, a pressing plate and an upper spacing plate, the pressing plate and the upper spacing plate are oppositely arranged and are connected through a plurality of applying springs, the pressing plate is provided with a plurality of penetrating guide rods and the penetrating guide rods slidingly pass through the upper spacing plate, and the load applying cylinder part is arranged on the top frame part and the end of the load applying cylinder part is fixedly connected with the upper end face of the upper spacing plate.

[0016] By adopting the technical scheme, the present application has the following beneficial effects:

[0017] The portable building concrete strength detection device provided by the present application can dynamically monitor the diameter change of the core sample through the bulging detection part, capture the surface crack expansion through the crack scanner, comprehensively determine the concrete strength according to a plurality of damage characteristics, and significantly improve the accuracy and reliability of the detection result. The rotating transmission assembly drives the detection mounting ring body to alternately rotate in the positive direction and the reverse direction, so that the bulging detection part and the crack scanner cover the entire circumferential surface of the core sample, avoiding missed detection of local damage and ensuring data integrity. The integrated frame design facilitates transportation and on-site horizontal positioning, integrates the longitudinal driving and automatic rotating functions, realizes rapid and continuous dynamic detection, and greatly improves the operation efficiency. The load applying assembly records the damage load in real time and synchronously associates the damage load with the damage characteristic data, thereby providing an accurate basis for strength calculation and reducing human error. The servo drive motor controls the longitudinal movement and cooperates with the rotating transmission assembly to realize the automatic detection process, thereby reducing the operation difficulty and being suitable for complex on-site environments. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative labor.

[0019] Figure 1The overall structure of the detection device in one embodiment of the present application.

[0020] Figure 2 The connection structure of the destruction feature detection mechanism and the longitudinal driving component in one embodiment of the present application.

[0021] Figure 3 The structure of the destruction feature detection mechanism in one embodiment of the present application.

[0022] Figure 4 The overall structure of the detection device in one embodiment of the present application. Figure 3 The enlarged structure of A in the middle.

[0023] Figure 5 The structure of the rotation transmission assembly in one embodiment of the present application.

[0024] Figure 6 The structure of the bulging detection part in one embodiment of the present application.

[0025] Figure 7 The structure of the detection table component in one embodiment of the present application.

[0026] Figure 8 The cross-sectional structure of the detection table component in one embodiment of the present application.

[0027] Figure 9 The structure of the load applying assembly in one embodiment of the present application.

[0028] Support frame component 100, chassis part 110, side plate type rack body 120, top rack part 130, guide slot 140, core sample main body 200, detection table component 300, outer disc piece 310, side through port 311, upper radial through port 312, inner support table 320, positioning unit 330, positioning clamp block 331, positioning sliding seat 332, positioning extension rod 333, return spring 334, positioning operation unit 340, positioning turntable part 341, pushing arc line slot 342, lever piece 343, load application assembly 400, load application cylinder piece 410, pressing plate 420, upper spacing action plate 430, through guide rod 440, application spring 450, damage feature detection mechanism 500, detection mounting ring body 510, driven incomplete rack 511, fixed seat 512, upper fixed ring 520, lower adjustment ring assembly 530, lower adjustment turn ring 531, arc line action slide 532, radial outer rod frame 533, sliding seat part 534, adjustment screw 535, turn head part 536, movable connection part 537, bulge detection part 540, hollow insertion rod piece 541, elastic load cell 542, rolling contact part 543, lower driven rod 544, main rack part 550, rotation guide part 560, rotation rack part 561, follow-up action roller 562, mounting sliding block 563, crack scanner 570, rotation follow-up part 580, rotating sleeve 581, driven support arm 582, umbrella gear part 583, driven tooth body 584, longitudinal drive component 600, longitudinal screw piece 610, limit guide rod 620, servo drive motor 630. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are 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 of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0030] The left-right-up-down positions of various components shown in the drawings are only one arrangement, and the specific positions are set according to specific needs.

[0031] In one embodiment, as Figures 1-3The portable building concrete strength detection device is shown, which comprises a support frame component 100, a detection table component 300 for carrying a core sample body 200 and a load applying assembly 400 for applying a detection load to the core sample body 200 from the top; the support frame component 100 is composed of a chassis part 110, a side plate type frame body 120 and a top frame part 130, the detection table component 300 is arranged on the chassis part 110 and the side plate type frame body 120 connects the chassis part 110 and the top frame part 130 into an integrated body; the load applying assembly 400 is arranged on the top frame part 130 and is aligned with the center of the detection table component 300, further comprising a damage feature detection mechanism 500 and a longitudinal driving component 600, the damage feature detection mechanism 500 comprises a detection mounting ring body 510, an upper fixed ring 520, a bulging detection part 540, a main frame part 550 and a rotary transmission assembly, the detection mounting ring body 510 is located directly below the load applying assembly 400 and can be sleeved outside the core sample body 200 in the center of the detection table component 300, the upper fixed ring 520 is rotationally arranged on the upper part of the detection mounting ring body 510 and one side of the upper fixed ring 520 is connected with the longitudinal driving component 600 through the main frame part 550, the longitudinal driving component 600 is used for driving the main frame part 550 to move longitudinally along the side plate type frame body 120; the rotary transmission assembly is arranged on the main frame part 550, one end of the rotary transmission assembly is connected with the outer wall of the detection mounting ring body 510 and the other end is connected with the side plate type frame body 120, when the rotary transmission assembly moves longitudinally along with the main frame part 550, the side plate type frame body 120 acts on the rotary transmission assembly and drives the detection mounting ring body 510 to rotate alternately in the positive and negative directions through the rotary transmission assembly; the bulging detection part 540 is a plurality of and is distributed circumferentially on the outer wall of the detection mounting ring body 510, the end of the bulging detection part 540 pointing to the center of the detection mounting ring body 510 can contact the outer wall of the core sample body 200 in a rolling manner, and a plurality of circumferentially distributed crack scanners 570 are further arranged on the inner wall of the detection mounting ring body 510, the crack scanners 570 are used for scanning the crack condition of the surface of the core sample body 200.

[0032] In the embodiment of the present application, the tester can place the whole device on the horizontal ground or test table by lifting the side plate type frame body 120 or the top frame part 130 to ensure that the chassis part 110 is horizontal, place the core sample main body 200 on the upper end surface of the test table part 300 and at the central position; the load applying assembly 400 works and applies a detection load to the damage feature detection mechanism 500 from the top, wherein the load applying assembly 400 gradually increases the pressure until the core sample main body 200 is damaged, and the load applying assembly 400 records the load applied when the core sample main body 200 is damaged; during the detection process, the longitudinal driving part 600 and the crack scanner 570 start to work, the longitudinal driving part 600 drives the main frame part 550 to move longitudinally and reciprocally along the side plate type frame body 120, the rotary transmission assembly, the upper fixed ring 520 and the detection mounting ring body 510 all move longitudinally along with the main frame part 550; since the detection mounting ring body 510 is annular and the one end of the bulging detection part 540 rolls in contact with the outer wall of the core sample main body 200, the bulging detection part 540 and the crack scanner 570 all move longitudinally and reciprocally along the outer wall of the core sample main body 200, the bulging detection part 540 senses the change of the longitudinal diameter of the core sample main body 200 through the change of its own elasticity, and when the diameter change exceeds the preset target change value, it indicates that the core sample main body 200 is damaged due to the bulging of the circumferential surface; the crack scanner 570 scans the circumferential surface of the core sample main body 200, and when the circumferential surface of the core sample main body 200 has obvious longitudinal (vertical) cracks and gradually expands, it indicates that it meets the typical feature of the damage of the core sample main body 200 under pressure, and then the comprehensive features of the damage of the core sample main body 200 can be used as the standard for judging whether the core sample main body 200 is damaged, and the test load applied can be recorded by the load applying assembly 400 to accurately obtain the concrete strength; under the action of the side plate type frame body 120, the rotary transmission assembly acts on the detection mounting ring body 510 to make it rotate alternately in the positive and negative directions during the longitudinal movement, so that the bulging detection part 540 and the crack scanner 570 rotate along with the detection mounting ring body 510, and then the bulging detection part 540 can fully contact the circumferential surface of the core sample main body 200 and the crack scanner 570 can fully scan the circumferential surface of the core sample main body 200, effectively detecting the typical features generated by the damage of the core sample main body 200 under pressure. The longitudinal screw member 610 includes a longitudinal screw member 610, a limiting guide rod 620 and a servo drive motor 630, the longitudinal screw member 610 is connected to the output end of the servo drive motor 630 arranged at the top of the top frame part 130, the longitudinal screw member 610 is screwed through the main frame part 550 and the limiting guide rod 620 is slidably through the main frame part 550, the longitudinal screw member 610 is parallel to the limiting guide rod 620, and the servo drive motor 630 can drive the longitudinal screw member 610 to rotate, and the rotating longitudinal screw member 610 can drive the longitudinal movement of the whole damage feature detection mechanism 500 through the screw connection with the main frame part 550 and the guiding and limiting of the limiting guide rod 620 to the main frame part 550.

[0033] In one embodiment, such as Figures 1-5 As shown, the outer wall of the detection mounting ring 510 is provided with a driven incomplete rack 511 opposite to the main frame 550. The rotary transmission assembly includes a rotary guide 560 and a rotary follower 580. The rotary guide 560 is located on the main frame 550 and one end is connected to the side plate frame 120. The rotary follower 580 includes a rotating sleeve 581, a driven support arm 582, and a bevel gear 583. The rotating sleeve 581 is rotatably connected to the main frame 550 via a rotating shaft. The outer wall of the rotating sleeve 581 is connected to the rotary guide 560. When the rotary guide 560 moves longitudinally following the main frame 550, the side plate frame 120 acts on the rotating sleeve 581 through the rotary guide 560 to make it rotate around the connection point with the main frame 550. One end of the driven support arm 582... One end is fixedly connected to the rotating sleeve 581, and the other end is provided with a bevel gear part 583. The center of the bevel gear part 583 coincides with the center line of the rotating sleeve 581, and the bevel gear part 583 meshes with the driven incomplete rack 511. In this embodiment of the invention, the longitudinally moving rotating guide part 560 drives the rotating sleeve 581 to rotate under the action of the side plate frame 120. The driven support arm 582 and the bevel gear part 583 both follow the rotation of the rotating sleeve 581. The bevel gear part 583 meshes with the driven incomplete rack 511 to make the detection mounting ring 510 rotate, thereby making multiple crack scanners 570 and multiple bulge detection parts 540 act on the entire circumferential surface of the core sample body 200 to improve the accuracy of the acquisition of the damage features and accurately obtain the test load when the core sample body 200 is damaged.

[0034] In one embodiment, such as Figures 1-5 As shown, the side-plate frame 120 has a wavy guide groove 140 on its side wall facing the damage feature detection mechanism 500. The rotating sleeve 581 has a driven tooth 584 on its circumferential surface. The rotating guide part 560 includes a rotating rack part 561, a follower roller 562, and a mounting slider 563. The rotating rack part 561 is located on the side of the rotating sleeve 581 and meshes with the driven tooth 584. The rotating rack part 561 slides with the side of the main frame part 550 through a bevel gear part 583. The follower roller 562... 2 One end is rotatably connected to the side of the rotating rack portion 561 around its own axis, and the other end extends into the guide groove 140; In this embodiment of the invention, the rotating guide portion 560 moves longitudinally following the main frame portion 550, and the follower roller 562 moves along the guide groove 140. Due to the wavy shape of the guide groove 140, the follower roller 562 moves back and forth in the transverse direction and acts on the rotating rack portion 561. The rotating rack portion 561 moves back and forth in the horizontal direction and, through meshing with the driven tooth body 584, causes the rotating sleeve 581 to rotate alternately in both directions.

[0035] In one embodiment, as shown in Figure 1 , Figure 2 , Figure 3 and Figure 6 , the bulging detection part 540 comprises a hollow insertion rod member 541 and a rolling contact part 543, the hollow insertion rod member 541 passes through the detection mounting ring body 510 radially, the end of the hollow insertion rod member 541 pointing to the center of the detection mounting ring body 510 is provided with an elastic load cell 542, and the rolling contact part 543 is mounted at the end of the elastic load cell 542; in the embodiment of the application, the rolling contact part 543 is a ball and is in rolling contact with the circumferential surface of the core sample body 200, when the core sample body 200 is pressed and the circumferential surface appears to be bulging, the rolling contact part 543 passes through and is pressed, the elastic load cell 542 can sense the change of pressure to reflect the change of the longitudinal diameter of the core sample body 200, when the diameter change exceeds the range of the preset target change value, it is indicated that the circumferential surface of the core sample body 200 is pressed to appear to be bulging and is damaged.

[0036] In one embodiment, as shown in Figures 1-6 , the lower end of the detection mounting ring body 510 is provided with a lower adjusting ring assembly 530, the hollow insertion rod member 541 is in radial sliding fit with the detection mounting ring body 510, and the outer end of the hollow insertion rod member 541 is provided with a lower driven rod 544, the lower adjusting ring assembly 530 comprises a lower adjusting ring 531 and an adjusting driving unit, the lower adjusting ring 531 is in rotary fit with the bottom of the detection mounting ring body 510, and the circumferential outer wall of the lower adjusting ring 531 is provided with a plurality of arc action slides 532 corresponding to the bulging detection part 540 respectively, the end of the lower driven rod 544 away from the hollow insertion rod member 541 extends into the corresponding arc action slide 532 and is in rolling sliding fit with the arc action slide 532, and the adjusting driving unit is arranged at the side of the detection mounting ring body 510 and is connected with the side wall of the lower adjusting ring 531, and the adjusting driving unit is used to drive the lower adjusting ring 531 to rotate relative to the detection mounting ring body 510; in the embodiment of the application, before detection, the detection worker can first drive the lower adjusting ring 531 to rotate through the adjusting driving unit, the arc action slide 532 rotates with the lower adjusting ring 531 and can act on the lower driven rod 544 through the arc of itself, the lower driven rod 544 moves in the arc action slide 532 and drives the hollow insertion rod member 541 to move radially relative to the detection mounting ring body 510, so that the distance between the hollow insertion rod member 541 and the core sample body 200 can be adjusted to ensure that the rolling contact part 543 is in rolling contact with the outer wall of the core sample body 200, and the pressure between them is in the preset range, so that the detection result is not affected by the stress on the outer wall of the core sample body 200 when the core sample body 200 bears the load.

[0037] In one embodiment, as shown in Figures 1-6As shown, the outer wall of the detection mounting ring body 510 is provided with a fixing seat 512, the adjusting driving unit comprises a radial outer lever frame 533 and an adjusting screw 535, the radial outer lever frame 533 is provided with a slidable sliding block part 534, the adjusting screw 535 is screwed through the fixing seat 512, one end of the adjusting screw 535 is provided with a rotating head part 536 which is rotationally matched with the adjusting screw 535, the outer wall of the mounting sliding block 563 is provided with a movable connecting part 537 which is rotationally matched with the top of the sliding block part 534; in the embodiment, the staff member twists the adjusting screw 535 to move it relative to the fixing seat 512, due to the rotationally matched adjusting screw 535 and the rotating head part 536, under the limitation of the sliding block part 534 and the radial outer lever frame 533, the rotating head part 536 will not rotate with the adjusting screw 535, the rotating head part 536 moves along the axial direction of the adjusting screw 535 outside the detection mounting ring body 510, the moving rotating head part 536 acts on the sliding block part 534 through the movable connecting part 537, the sliding block part 534 moves with the rotating head part 536 and pushes the radial outer lever frame 533 to make the lower adjusting rotating ring 531 rotate relative to the detection mounting ring body 510, the rotating lower adjusting rotating ring 531 adjusts the bulging detection part 540 through the arc action sliding way 532; after the adjustment, due to the screw matched adjusting screw 535 and the fixing seat 512, the radial outer lever frame 533 and the lower adjusting rotating ring 531 can keep stable state, further ensuring the position of the bulging detection part 540 fixed after the adjustment.

[0038] In one embodiment, as Figure 1 、 Figure 7 and Figure 8As shown, the detection platform component 300 comprises an outer disc 310, an inner support platform 320, a positioning operation unit 340 and a plurality of positioning units 330, the outer disc 310 is fixed on the end face of the chassis 110 and the inner part of the outer disc 310 is hollow, a plurality of upper radial through holes 312 are arranged on the upper end face of the outer disc 310 and are uniformly distributed in the circumferential direction, the inner support platform 320 is arranged at the center part of the outer disc 310 and is used for bearing the core sample main body 200, the plurality of positioning units 330 are correspondingly slidingly installed in the inner part of the upper radial through holes 312, the positioning operation unit 340 is arranged in the inner part of the outer disc 310 and is connected with the bottom part of the plurality of positioning units 330, and one end of the positioning operation unit 340 extends out from the side through hole 311; in the embodiment of the present application, after the core sample main body 200 is placed on the upper end face of the inner support platform 320, the staff member pushes the positioning operation unit 340 to extend to the end part outside from the side through hole 311, the positioning operation unit 340 is rotated and acts on the plurality of positioning units 330, the plurality of positioning units 330 are synchronously moved along the upper radial through holes 312 towards the center of the inner support platform 320, the plurality of positioning units 330 can push the core sample main body 200 to the center of the inner support platform 320 to ensure that the pressure applied by the load applying assembly 400 on the top part of the core sample main body 200 will not be dislocated, after the positioning operation unit 340 is loosened, the plurality of positioning units 330 are automatically reset and will not cause the bottom outer wall of the core sample main body 200 to be pressed to affect the accuracy of the detection after the load is applied to the core sample main body 200.

[0039] In one embodiment, as Figure 1 、 Figure 7 and Figure 8As shown, the positioning unit 330 comprises a positioning clamping block 331, a positioning sliding seat 332 and a positioning extension rod 333, the positioning sliding seat 332 is slidingly arranged inside the upper radial opening 312 and connected with the end wall of the upper radial opening 312 through a reset spring 334, the positioning clamping block 331 is fixed on the positioning sliding seat 332 and one end thereof extends towards the center of the inner supporting table 320, and the positioning extension rod 333 is fixed on the bottom of the positioning sliding seat 332; the positioning operation unit 340 comprises a positioning rotary disc part 341 and a lever member 343, the positioning rotary disc part 341 is rotationally arranged inside the outer disc part 310, the lever member 343 is fixed on the edge of the positioning rotary disc part 341 and extends out from the side opening 311, the end face of the positioning rotary disc part 341 is provided with a plurality of pushing arc grooves 342 and the center of the pushing arc groove 342 is dislocated with the center of the positioning rotary disc part 341, and the end of the positioning extension rod 333 away from the positioning sliding seat 332 extends into the corresponding pushing arc groove 342; in the embodiment, the lever member 343 is actuated to rotate the positioning rotary disc part 341 in one direction inside the outer disc part 310, the pushing arc groove 342 rotates with the positioning rotary disc part 341, the pushing arc groove 342 acts on the positioning extension rod 333 through the rolling movement of the positioning extension rod 333 and moves the positioning sliding seat 332 towards the center of the inner supporting table 320 inside the upper radial opening 312, at this time, the reset spring 334 is compressed; after the lever member 343 is released, the positioning sliding seat 332 moves back and acts on the positioning rotary disc part 341 through the positioning extension rod 333, so that the positioning rotary disc part 341 rotates back to the initial position due to the elastic force of the reset spring 334.

[0040] In one embodiment, as Figure 1 and Figure 9As shown, the load applying assembly 400 includes a load applying cylinder member 410, a pressing plate 420 and an upper spacer plate 430, the pressing plate 420 and the upper spacer plate 430 are oppositely arranged and connected through a plurality of applying springs 450, the pressing plate 420 is provided with a plurality of through guide rods 440 and the through guide rods 440 slide through the upper spacer plate 430; the load applying cylinder member 410 is arranged at the top frame part 130, and the end of the load applying cylinder member 410 is fixedly connected with the upper end surface of the upper spacer plate 430; in the embodiment, the load applying cylinder member 410 drives the pressing plate 420 and the upper spacer plate 430 to move downward and press on the top of the core sample body 200 through the extension and contraction of the load applying cylinder member 410, when the load applying cylinder member 410 continues to press the upper spacer plate 430 downward, the upper spacer plate 430 moves relative to the pressing plate 420 and applies load to the pressing plate 420 and the top of the core sample body 200 through the applying springs 450, the pressing plate 420 is provided with a pressure sensor and senses the pressure between the pressing plate 420 and the top of the core sample body 200; when the core sample body 200 is pressed to be destroyed and the height changes, the destruction of the core sample body 200 can be confirmed through the change of the pressure sensor.

[0041] The above embodiment provides a portable building concrete strength detection device, and the working principle is as follows:

[0042] 1. Initial preparation stage

[0043] Horizontal positioning: place the device on the horizontal ground by lifting the side plate type frame body 120 or the top frame part 130, and ensure that the chassis part 110 is horizontal.

[0044] Core sample fixing: place the core sample body 200 on the inner support table 320 of the detection table part 300, push the lever member 343 of the positioning operation unit 340, drive the positioning turntable part 341 to rotate. Push the positioning extension rod 333 through the arc slot 342, and make the positioning clamping block 331 radially contract synchronously, so that the core sample body 200 is accurately positioned at the center of the inner support table 320. After the lever member 343 is loosened, the positioning clamping block 331 is reset under the elastic action of the reset spring 334, so as to avoid interference with subsequent detection.

[0045] Detection ring adjustment: rotate the lower adjustment ring 531 through the adjustment driving unit (adjustment screw 535), the arc action slide 532 pushes the lower driven rod 544, adjusts the radial position of the bulging detection part 540, and ensures that the rolling contact part 543 is in moderate contact with the outer wall of the core sample (the pressure is within the preset range).

[0046] 2. Load applying and destruction detection stage

[0047] Vertical pressing:

[0048] Load applying assembly 400 starts, load applying cylinder 410 pushes up spacer plate 430 and pressing plate 420 to press the core sample top. Pressing plate 420 transmits pressure through spring 450, and the pressure sensor monitors the load value in real time.

[0049] Destruction determination condition: when the core sample is crushed, the pressure drops suddenly, and the load value at this time is recorded as the basis for concrete strength.

[0050] Dynamic ring detection:

[0051] Longitudinal scanning: servo drive motor 630 drives longitudinal screw 610 to rotate, driving main frame 550 and destruction feature detection mechanism 500 to move longitudinally along side plate frame 120.

[0052] Rotary scanning:

[0053] Rotary transmission assembly: when main frame 550 moves, follow-up roller 562 moves laterally along wavy guide groove 140, driving rotary rack 561 to move horizontally, and through driven gear body 584, rotating sleeve 581 rotates alternately.

[0054] Ring rotation: rotating sleeve 581 is engaged with driven incomplete rack 511 through umbrella-shaped gear 583, driving detection installation ring 510 to rotate alternately.

[0055] Multi-dimensional destruction feature capture:

[0056] Bulging detection: rolling contact 543 moves longitudinally with the rotation of the ring, scanning the outer wall of the core sample in a spiral trajectory. Elastic force bar 542 senses pressure changes in real time, and if local bulging causes the diameter to exceed the preset value, a destruction signal is triggered.

[0057] Crack detection: crack scanner 570 rotates synchronously with longitudinal movement, scanning the longitudinal cracks on the surface of the core sample, and combining image analysis to determine the extent of crack propagation.

[0058] 3. Data integration and strength determination

[0059] Multi-feature fusion: the following signals are integrated to determine the destruction of the core sample:

[0060] The pressure peak value (main destruction load) recorded by load applying assembly 400;

[0061] The diameter anomaly signal of bulging detection part 540;

[0062] The longitudinal crack propagation image captured by crack scanner 570;

[0063] Result output: the compressive strength of concrete is calculated through the maximum load at the time of destruction and the size of the core sample.

[0064] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

Claims

1. A portable concrete strength testing device, comprising a support frame component, a testing platform component for supporting a core sample body, and a load application component for applying a testing load to the core sample body from the top; the support frame component consists of a base, a side-plate frame, and a top frame; the testing platform component is disposed on the base and the side-plate frame connects the base and the top frame as a whole; the load application component is disposed on the top frame and aligned with the center of the testing platform component, characterized in that... It also includes a damage feature detection mechanism and a longitudinal drive component; The damage feature detection mechanism includes a detection mounting ring, an upper fixing ring, a bulge detection part, a main frame part, and a rotary transmission assembly; The detection mounting ring is located directly below the load application component and can be looped around the outside of the core sample body located at the center of the detection table component. The upper fixing ring is rotatably located on the upper part of the detection mounting ring and one side of the upper fixing ring is connected to the longitudinal drive component through the main frame. The longitudinal drive component is used to drive the main frame to move longitudinally along the side plate frame. The rotary transmission assembly is located on the main frame. One end of the rotary transmission assembly is connected to the outer wall of the detection and mounting ring and the other end is connected to the side plate frame. When the rotary transmission assembly moves longitudinally with the main frame, the side plate frame acts on the rotary transmission assembly and drives the detection and mounting ring to rotate alternately in both directions through the rotary transmission assembly. The bulging detection part is a plurality of parts distributed circumferentially on the outer wall of the detection mounting ring. The end of the bulging detection part pointing to the center of the detection mounting ring can contact the outer wall of the core sample body in a rolling manner. The inner wall of the detection mounting ring is also provided with a plurality of circumferentially distributed crack scanners, which are used to scan the crack condition on the surface of the core sample body. The outer wall of the detection mounting ring is provided with a driven incomplete rack opposite to the main frame part, and the rotary transmission assembly includes a rotary guide part and a rotary follower part; The rotating guide is located on the main frame and one end is connected to the side plate frame. The rotating follower includes a rotating sleeve, a driven arm and a bevel gear. The rotating sleeve is rotatably connected to the main frame via a rotating shaft. The outer wall of the rotating sleeve is connected to the rotating guide. When the rotating guide moves longitudinally with the main frame, the side plate frame acts on the rotating sleeve through the rotating guide to make it rotate around the connection point with the main frame. One end of the driven arm is fixedly connected to the rotating sleeve, and the other end is provided with a bevel gear. The center of the bevel gear coincides with the center line of the rotating sleeve, and the bevel gear meshes with the driven incomplete rack. The side plate frame has a guide groove with a wave shape from top to bottom on the side wall facing the damage feature detection mechanism, and a driven tooth on the circumferential surface of the rotating sleeve; The rotary guide includes a rotary rack, a follower roller, and a mounting slider; The rotating rack is located on the side of the rotating sleeve and meshes with the driven tooth. The rotating rack is slidably engaged with the side of the main frame through the bevel gear. One end of the follower roller is rotatably connected to the side of the rotating rack around its own axis, and the other end extends into the guide groove.

2. The portable building concrete strength testing device according to claim 1, characterized in that, The bulging detection part includes a hollow insert rod and a rolling contact part; The hollow insert rod passes radially through the detection and mounting ring. The end of the hollow insert rod pointing towards the center of the detection and mounting ring has an elastic force measuring rod, and a rolling contact part is installed at the end of the elastic force measuring rod.

3. The portable building concrete strength testing device according to claim 2, characterized in that, The lower end of the detection mounting ring has a lower adjustment ring assembly, the hollow insert rod is radially slidingly engaged with the detection mounting ring, and the outer end of the hollow insert rod has a lower driven rod. The lower adjustment ring assembly includes a lower adjustment rotating ring and an adjustment drive unit. The lower adjusting ring rotates in a rotatable engagement with the bottom of the detection mounting ring, and the outer circumferential wall of the lower adjusting ring has multiple arc-shaped sliding tracks corresponding to the bulging detection part. The end of the lower driven rod away from the hollow insert extends into the corresponding arc-shaped sliding track and rolls in a sliding engagement with it. The adjustment drive unit is located on the side of the detection mounting ring and connected to the side wall of the lower adjustment ring. The adjustment drive unit is used to drive the lower adjustment ring to rotate relative to the detection mounting ring.

4. The portable building concrete strength testing device according to claim 3, characterized in that, The outer wall of the detection mounting ring has a fixed seat, and the adjustment drive unit includes a radial outer rod frame and an adjustment screw. The radial outer rod frame is provided with a slidable slide block, the adjusting screw spirally passes through the fixed seat, one end of the adjusting screw has a rotating head that rotates with it, and the outer wall of the mounting slider is provided with a movable connecting part that rotates with the top of the slide block.

5. The portable building concrete strength testing device according to claim 1, characterized in that, The testing station component includes an outer disk, an inner support platform, a positioning operation unit, and multiple positioning units; The outer disc is fixed to the upper end face of the chassis and is hollow inside. The upper end face of the outer disc has multiple circumferentially evenly distributed upper radial through-holes. The inner support platform is located in the center of the outer disc and is used to support the core sample body. Multiple positioning units are slidably installed inside the upper radial through-hole. The positioning operation unit is located inside the outer disc and connected to the bottom of the multiple positioning units. One end of the positioning operation unit extends out from the side through-hole.

6. The portable building concrete strength testing device according to claim 5, characterized in that, The positioning unit includes a positioning clamp, a positioning slide, and a positioning extension rod; The positioning slide is slidably disposed inside the upper radial passage and the positioning slide is connected to the end wall of the upper radial passage by a return spring. The positioning clamp is fixed on the positioning slide and one end of it extends toward the center of the inner support platform. The positioning extension rod is fixed to the bottom of the positioning slide. The positioning operation unit includes a positioning turntable and a lever. The positioning turntable is rotatably disposed inside the outer disc. The lever is fixed to the edge of the positioning turntable and extends out from the side opening. The end face of the positioning turntable has multiple pushing arc grooves, and the center of the pushing arc grooves is offset from the center of the positioning turntable. The end of the positioning extension rod away from the positioning slide extends into the corresponding pushing arc groove.

7. The portable building concrete strength testing device according to any one of claims 1-6, characterized in that, The load application assembly includes a load application cylinder, a pressure plate, and an upper spacer plate; The pressure plate and the upper spacer plate are arranged opposite to each other and connected by multiple application springs. The pressure plate has multiple through guide rods that slide through the upper spacer plate. The load application cylinder is located on the top frame and its end is fixedly connected to the upper surface of the upper spacer plate.

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