Portable building concrete strength detection device

Abstract

The invention provides a portable building concrete strength detection device, and relates to the technical field of concrete detection, and the detection device comprises a support frame part, a detection table part, a load applying assembly, a damage characteristic detection mechanism and a longitudinal driving part. The damage characteristic detection mechanism comprises a detection mounting ring body, an upper fixing ring, a circumferentially distributed bulge detection part and a crack scanner, and is driven by a longitudinal driving part to longitudinally reciprocate along the outer wall of the core sample. And the rotary transmission assembly drives the detection mounting ring body to alternately rotate forwards and backwards in the moving process, so that the bulge detection part comprehensively senses the diameter change, and the crack scanner scans the surface crack. The concrete strength is accurately judged by comprehensively detecting multiple damage characteristics such as compression bulging and crack propagation and combining load records, the problems that traditional single-point detection is large in error and incomplete in characteristic recognition are solved, and the concrete strength detection device has the advantages of being portable, efficient and high in 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 an engineering composite material in which aggregates are cemented 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 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. The portable building concrete strength detection device comprises a support frame component, a detection table component for bearing 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, 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, the end 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, the crack scanners are used for scanning the crack condition of the surface of the core sample body.

[0006] On the basis of the above technical scheme, the application further provides the following optional technical schemes: 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 rotating sleeve, a driven branch arm and an umbrella-shaped gear part, the rotating sleeve is rotationally connected with the main frame part through a rotating shaft, the outer wall of the rotating 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 rotating sleeve through the rotary guide part to make the rotating sleeve rotate around the connection with the main frame part; one end of the driven branch arm is fixedly connected with the rotating sleeve and the other end is provided with the umbrella-shaped gear part, the center of the umbrella-shaped gear part is coincident with the center line of the rotating sleeve, and the umbrella-shaped gear part is engaged with the driven incomplete rack.

[0007] 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 has a driven gear body on the circumferential surface, 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 side of the main frame part through the umbrella-shaped gear 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 inside of the guide groove.

[0008] In an alternative: the bulge detection part includes a hollow insertion rod and a rolling contact part, the hollow insertion rod penetrates the detection mounting ring body in the radial direction, the end of the hollow insertion rod 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.

[0009] In an alternative: the lower end of the detection mounting ring body has a lower adjusting ring assembly, the hollow insertion rod is slidingly fitted with the detection mounting ring body in the radial direction, and the outer end of the hollow insertion rod 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, the circumferential outer wall of the lower adjusting rotating ring has a plurality of arc-shaped action slides corresponding to the bulge detection parts, respectively, the end of the lower driven rod extending away from the hollow insertion rod 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.

[0010] 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, the outer wall of the mounting sliding block is provided with a movable connection part, and the movable connection part is rotatably fitted with the top of the sliding seat part.

[0011] 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 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 part 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.

[0012] 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 groove 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.

[0013] 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.

[0014] By adopting the technical scheme, the present application has the following beneficial effects: 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

[0015] In order to more clearly illustrate the specific embodiments of the present application or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. 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 creating any inventive labor.

[0016] Figure 1The overall structure of the detection device in one embodiment of the present application.

[0017] Figure 2 The connection structure of the destruction feature detection mechanism and the longitudinal driving component in one embodiment of the present application.

[0018] Figure 3 The structure of the destruction feature detection mechanism in one embodiment of the present application.

[0019] Figure 4 The Figure 3 The enlarged structure at A in the middle.

[0020] Figure 5 The structure of the rotation transmission assembly in one embodiment of the present application.

[0021] Figure 6 The structure of the bulging detection part in one embodiment of the present application.

[0022] Figure 7 The structure of the detection table component in one embodiment of the present application.

[0023] Figure 8 The cross-sectional structure of the detection table component in one embodiment of the present application.

[0024] Figure 9 The structure of the load applying assembly in one embodiment of the present application.

[0025] Support frame component 100, chassis part 110, side plate type rack body 120, top rack part 130, guide groove 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 groove 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 gear body 584, longitudinal drive component 600, longitudinal screw piece 610, limit guide rod 620, servo drive motor 630. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] In one embodiment, as Figures 1-3As shown, a portable concrete strength testing device includes a support frame component 100, a testing platform component 300 for supporting a core sample body 200, and a load application component 400 for applying a testing load to the core sample body 200 from the top. The support frame component 100 consists of a base portion 110, a side plate frame 120, and a top frame portion 130. The testing platform component 300 is mounted on the base portion 110, and the side plate frame 120 connects the base portion 110 and the top frame portion 130 into a single unit. The load application component 400... The application component 400 is mounted on the top frame 130 and aligned with the center of the testing table component 300. It also includes a damage feature detection mechanism 500 and a longitudinal drive component 600. The damage feature detection mechanism 500 includes a detection mounting ring 510, an upper fixing ring 520, a bulge detection part 540, a main frame part 550, and a rotation transmission assembly. The detection mounting ring 510 is located directly below the load application component 400 and can be looped around the outside of the core sample body 200 located at the center of the testing table component 300. The upper fixing ring... A rotating ring 520 is rotatably mounted on the upper part of the detection and mounting ring 510, with one side of the upper fixed ring 520 connected to a longitudinal drive component 600 via a main frame 550. The longitudinal drive component 600 drives the main frame 550 to move longitudinally along the side plate frame 120. A rotary transmission assembly is mounted on the main frame 550, with one end connected to the outer wall of the detection and mounting ring 510 and the other end connected to the side plate frame 120. When the rotary transmission assembly moves longitudinally along with the main frame 550, the side plate frame 120... The 0 acts on the rotary transmission assembly and drives the detection mounting ring 510 to rotate alternately in both directions; the bulging detection part 540 is multiple and circumferentially distributed on the outer wall of the detection mounting ring 510, and the end of the bulging detection part 540 pointing to the center of the detection mounting ring 510 can contact the outer wall of the core sample body 200 in a rolling manner. The inner wall of the detection mounting ring 510 is also provided with multiple circumferentially distributed crack scanners 570, which are used to scan the crack conditions on the surface of the core sample body 200.

[0029] In this embodiment of the invention, the testing personnel can place the entire device on a horizontal ground or test platform by lifting the side plate frame 120 or the top frame 130 to ensure that the chassis 110 is horizontal, and place the core sample body 200 on the upper surface of the testing platform component 300 and in the center position; the load application component 400 operates and applies a detection load to the destructive feature detection mechanism 500 from the top, wherein the load application component 400 gradually increases the pressure until the core sample body 200 is destroyed, and the load application component 400 records the load applied when the core sample body 200 is destroyed. During the testing process, longitudinal... The drive unit 600 and crack scanner 570 begin operation. The longitudinal drive unit 600 drives the main frame 550 to reciprocate longitudinally along the side plate frame 120. The rotary transmission assembly, upper fixing ring 520, and detection mounting ring 510 all follow the longitudinal movement of the main frame 550. Since the detection mounting ring 510 is located on the outside of the core sample body 200 and one end of the bulging detection part 540 rolls in contact with the outer wall of the core sample body 200, both the bulging detection part 540 and the crack scanner 570 reciprocate longitudinally along the outer wall of the core sample body 200. The bulging detection part 540, through its own... The change in elasticity is sensed by the change in the longitudinal diameter of the core sample body 200. When the diameter change exceeds the preset target change value, it indicates that the circumferential surface of the core sample body 200 has been compressed and bulged, resulting in failure. The crack scanner 570 scans the circumferential surface of the core sample body 200. When obvious longitudinal (vertical) cracks appear on the surface of the circumferential surface of the core sample body 200 and gradually expand, it indicates that it meets the typical characteristics of the core sample body 200 under pressure failure. Therefore, the comprehensive characteristics of multiple failures of the core sample body 200 can be used as the standard to determine whether the core sample body 200 has failed, through load... The application component 400 records the applied test load, which can accurately determine the concrete strength. Under the action of the side plate frame 120, the rotary transmission component acts on the detection mounting ring 510 during longitudinal movement, causing it to rotate alternately in both directions. This causes the bulging detection part 540 and the crack scanner 570 to rotate with the detection mounting ring 510. Consequently, the bulging detection part 540 can fully contact the circumferential surface of the core sample body 200, and the crack scanner 570 can fully scan the circumferential surface of the core sample body 200, effectively detecting the typical characteristics of the core sample body 200 caused by compressive failure. The longitudinal lead screw 610 includes a longitudinal lead screw 610, a limiting guide rod 620, and a servo drive motor 630. The longitudinal lead screw 610 rotates with the top frame 130 and is connected to the output end of the servo drive motor 630 located on the top of the top frame 130. The longitudinal lead screw 610 spirally passes through the main frame 550, and the limiting guide rod 620 slides through the main frame 550. The longitudinal lead screw 610 and the limiting guide rod 620 are parallel. The servo drive motor 630 can drive the longitudinal lead screw 610 to rotate. The rotating longitudinal lead screw 610 can drive the longitudinal movement of the entire damage feature detection mechanism 500 by means of the spiral connection with the main frame 550 and the guiding and limiting of the main frame 550 by the limiting guide rod 620.

[0030] 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.

[0031] 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.

[0032] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the bulging detection part 540 includes a hollow insert rod 541 and a rolling contact part 543. The hollow insert rod 541 radially passes through the detection mounting ring 510, and the end of the hollow insert rod 541 pointing towards the center of the detection mounting ring 510 has an elastic force measuring rod 542. The rolling contact part 543 is installed at the end of the elastic force measuring rod 542. In this embodiment of the invention, the rolling contact part 543 is a ball bearing and rolls in contact with the circumferential surface of the core sample body 200. When the core sample body 200 is compressed and the circumferential surface bulges, the rolling contact part 543 passes through and is compressed. The elastic force measuring rod 542 can sense the pressure change to reflect the change in the longitudinal diameter of the core sample body 200. When the diameter change exceeds the range of the preset target change value, it indicates that the circumferential surface of the core sample body 200 has been compressed and bulged, thus being damaged.

[0033] In one embodiment, such as Figures 1-6 As shown, the lower end of the detection mounting ring 510 has a lower adjusting ring assembly 530. A hollow insert rod 541 is radially slidably fitted with the detection mounting ring 510, and the outer end of the hollow insert rod 541 has a lower driven rod 544. The lower adjusting ring assembly 530 includes a lower adjusting rotating ring 531 and an adjusting drive unit. The lower adjusting rotating ring 531 is rotatably fitted with the bottom of the detection mounting ring 510, and the outer circumferential wall of the lower adjusting rotating ring 531 has multiple arc-shaped sliding tracks 532 corresponding to the bulging detection portion 540. The end of the lower driven rod 544 away from the hollow insert rod 541 extends into the corresponding arc-shaped sliding track 532 and rolls and slides with it. The adjusting drive unit is located on the side of the detection mounting ring 510 and connected to the side wall of the lower adjusting rotating ring 531. The adjustment drive unit is used to drive the lower adjustment ring 531 to rotate relative to the detection mounting ring 510. In this embodiment of the invention, before detection, the detection personnel can first drive the lower adjustment ring 531 to rotate through the adjustment drive unit. The arc-shaped sliding track 532 follows the rotation of the lower adjustment ring 531 and acts on the lower driven rod 544 through its own curvature. The lower driven rod 544 moves within the arc-shaped sliding track 532 and drives the hollow insert 541 to move radially relative to the detection mounting ring 510, thereby adjusting the distance between the hollow insert 541 and the core sample body 200 to ensure rolling contact between the rolling contact part 543 and the outer wall of the core sample body 200. The pressure between the two is within a preset range, avoiding the core sample body 200 from being affected by the force on the outer wall when bearing load, thus preventing the detection results from being affected.

[0034] In one embodiment, such as Figures 1-6As shown, the outer wall of the detection mounting ring 510 has a fixed seat 512. The adjustment drive unit includes a radial outer rod frame 533 and an adjusting screw 535. A slidable slide portion 534 is provided on the radial outer rod frame 533. The adjusting screw 535 spirally passes through the fixed seat 512. One end of the adjusting screw 535 has a rotating head 536 that rotatably engages with it. A movable connecting portion 537 is provided on the outer wall of the mounting slider 563, and the movable connecting portion 537 rotatably engages with the top of the slide portion 534. In this embodiment of the invention, the operator moves the adjusting screw 535 relative to the fixed seat 512 by turning it. Because the end of the adjusting screw 535 rotatably engages with the rotating head 536, the rotating head is constrained by the slide portion 534 and the radial outer rod frame 533. Part 536 does not rotate with the adjusting screw 535. The rotating head 536 moves along the axis of the adjusting screw 535 outside the detection mounting ring 510. The moving rotating head 536 acts on the slide part 534 through the movable connecting part 537. The slide part 534 moves with the rotating head 536 and pushes the radial outer rod frame 533 so that the lower adjusting ring 531 rotates relative to the detection mounting ring 510. The rotating lower adjusting ring 531 adjusts the bulging detection part 540 through the arc action of the slide rail 532. After adjustment, since the adjusting screw 535 and the fixed seat 512 are screwed together, the radial outer rod frame 533 and the lower adjusting ring 531 can remain stable, further ensuring that the bulging detection part 540 is fixed in the adjusted position.

[0035] In one embodiment, such as Figure 1 , Figure 7 and Figure 8As shown, the detection stage component 300 includes an outer disk 310, an inner support platform 320, a positioning operation unit 340, and multiple positioning units 330. The outer disk 310 is fixed to the upper end face of the chassis 110 and is hollow inside. Multiple circumferentially evenly distributed upper radial openings 312 are provided on the upper end face of the outer disk 310. The inner support platform 320 is located at the center of the outer disk 310 and is used to support the core sample body 200. The multiple positioning units 330 are correspondingly slidably installed inside the upper radial openings 312. The positioning operation unit 340 is located inside the outer disk 310 and connected to the bottom of the multiple positioning units 330. One end of the positioning operation unit 340 extends out from the side opening 311. In this embodiment of the invention, the core sample... After the main body 200 is placed on the upper surface of the inner support platform 320, the operator pushes the positioning operation unit 340 from the side opening 311 to the outer end. The positioning operation unit 340 rotates and acts on multiple positioning units 330. The multiple positioning units 330 move synchronously along the upper radial opening 312 toward the center of the inner support platform 320. The multiple positioning units 330 can push the core sample body 200 to the center of the inner support platform 320 to ensure that the top of the core sample body 200 and the pressure applied by the load application component 400 will not be misaligned. After the positioning operation unit 340 is released, the multiple positioning units 330 automatically reset, which will not cause the bottom outer wall of the core sample body 200 to be compressed, thus affecting the accuracy of the detection after the core sample body 200 is loaded.

[0036] In one embodiment, such as Figure 1 , Figure 7 and Figure 8As shown, the positioning unit 330 includes a positioning clamping block 331, a positioning slide 332, and a positioning extension rod 333. The positioning slide 332 is slidably disposed inside the upper radial opening 312, and the positioning slide 332 is connected to the end wall of the upper radial opening 312 by a return spring 334. The positioning clamping block 331 is fixed on the positioning slide 332, and one end of it extends toward the center of the inner support platform 320. The positioning extension rod 333 is fixed to the bottom of the positioning slide 332. The positioning operation unit 340 includes a positioning turntable 341 and a lever 343. The positioning turntable 341 is rotatably disposed inside the outer disc 310. The lever 343 is fixed to the edge of the positioning turntable 341 and extends out from the side opening 311. The end face of the positioning turntable 341 has multiple pushing arc grooves 342, and the center of the pushing arc grooves 342 is aligned with the positioning turntable. The center of part 341 is misaligned, and the end of the positioning extension rod 333 away from the positioning slide 332 extends into the corresponding pushing arc groove 342. In this embodiment of the invention, the lever 343 is turned so that the positioning turntable part 341 rotates in one direction inside the outer plate part 310, and the pushing arc groove 342 follows the rotation of the positioning turntable part 341. The pushing arc groove 342 can act on the positioning extension rod 333 through the rolling movement cooperation with the positioning extension rod 333, and make the positioning slide 332 move towards the center of the inner support platform 320 inside the upper radial through-hole 312. At this time, the return spring 334 is compressed. After the lever 343 is released, due to the elastic force of the return spring 334 to restore its deformation, the positioning slide 332 moves back and acts on the positioning turntable part 341 through the positioning extension rod 333, thereby making the positioning turntable part 341 rotate back to the initial position.

[0037] In one embodiment, such as Figure 1 and Figure 9As shown, the load application assembly 400 includes a load application cylinder 410, a pressure plate 420, and an upper spacer plate 430. The pressure plate 420 and the upper spacer plate 430 are arranged opposite to each other and connected by a plurality of application springs 450. The pressure plate 420 has a plurality of through guide rods 440, and the through guide rods 440 slide through the upper spacer plate 430. The load application cylinder 410 is located on the top frame portion 130, and the end of the load application cylinder 410 is fixedly connected to the upper end face of the upper spacer plate 430. In this embodiment of the invention, the load application cylinder 410, through its own... The telescopic drive pressure plate 420 and upper spacer plate 430 move downward and press against the top of the core sample body 200. When the load application cylinder 410 continues to press down the upper spacer plate 430, the upper spacer plate 430 moves relative to the pressure plate 420 and applies load to the pressure plate 420 and the top of the core sample body 200 through the application spring 450. The pressure plate 420 has a pressure sensor and senses the pressure between the pressure plate 420 and the top of the core sample body 200. When the core sample body 200 is pressed to the point of failure and a height change occurs, the failure of the core sample body 200 can be confirmed by the change in the pressure sensor.

[0038] The above embodiments provide a portable concrete strength testing device, the working principle of which is as follows: 1. Initial preparation stage Horizontal positioning: Place the device on a horizontal ground by lifting the side plate frame 120 or the top frame 130, ensuring that the chassis 110 is horizontal.

[0039] Core Sample Fixation: Place the core sample body 200 on the inner support platform 320 of the testing stage component 300, and push the lever 343 of the positioning operation unit 340 to drive the positioning turntable 341 to rotate. Push the arc groove 342 to push the positioning extension rod 333, causing the positioning clamp 331 to retract radially synchronously, precisely positioning the core sample body 200 at the center of the inner support platform 320. After releasing the lever 343, the positioning clamp 331 resets under the elastic action of the return spring 334, avoiding interference with subsequent testing.

[0040] Detection ring adjustment: By adjusting the drive unit (adjusting screw 535) to rotate the adjusting ring 531, the arc-acting slide 532 pushes the driven rod 544 to adjust the radial position of the bulging detection part 540, ensuring that the rolling contact part 543 is in proper contact with the outer wall of the core sample (pressure within the preset range).

[0041] 2. Load application and damage detection stage Vertical pressure: The load application assembly 400 is activated, and the load application cylinder 410 pushes the upper spacer plate 430 and the pressure plate 420 to press down on the top of the core sample. The pressure plate 420 transmits pressure through the application spring 450, and the pressure sensor monitors the load value in real time.

[0042] Failure determination criteria: When the core sample is crushed, the pressure drops sharply, and the load value at this time is recorded as the basis for concrete strength.

[0043] Dynamic loop detection: Longitudinal scanning: The servo drive motor 630 drives the longitudinal lead screw 610 to rotate, which in turn drives the main frame 550 and the damage feature detection mechanism 500 to move longitudinally back and forth along the side plate frame 120.

[0044] Rotational scan: Rotary transmission assembly: When the main frame 550 moves, the follower roller 562 moves laterally and reciprocally along the wave-shaped guide groove 140, driving the rotating rack 561 to move horizontally, and the driven tooth 584 causes the rotating sleeve 581 to rotate alternately in both directions.

[0045] Ring rotation: The rotating sleeve 581 meshes with the driven incomplete rack 511 through the bevel gear part 583, driving the detection mounting ring 510 to rotate alternately in both directions.

[0046] Multi-dimensional destruction feature capture: Bulging detection: The rolling contact 543 moves longitudinally in coordination with the rotation of the ring body, scanning the outer wall of the core sample in a spiral trajectory. The elastic force measuring rod 542 senses pressure changes in real time. If local bulging causes the diameter to exceed the preset value, a damage signal is triggered.

[0047] Crack detection: The crack scanner 570 rotates synchronously and moves longitudinally to scan longitudinal cracks on the core sample surface, and the degree of crack propagation is determined by image analysis.

[0048] 3. Data Synthesis and Strength Determination Multi-feature fusion: Determining core sample damage by combining the following signals: The peak pressure recorded by the load-applied component 400 (main failure load); Abnormal signal in diameter of the bulge detection unit 540; Image of longitudinal crack propagation captured by Crack Scanner 570; Output results: Calculate the compressive strength of concrete using the maximum load at failure and the core sample size.

[0049] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed 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 section consists of multiple circumferentially distributed parts on the outer wall of the detection mounting ring. The end of the bulging detection section pointing towards 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 multiple circumferentially distributed crack scanners, which are used to scan the crack conditions on the surface of the core sample body.

2. The portable building concrete strength testing device according to claim 1, characterized in that, 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.

3. The portable building concrete strength testing device according to claim 2, characterized in that, 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.

4. 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.

5. The portable building concrete strength testing device according to claim 4, 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.

6. The portable building concrete strength testing device according to claim 5, 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.

7. 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.

8. The portable building concrete strength testing device according to claim 7, 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.

9. The portable building concrete strength testing device according to any one of claims 1-8, 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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