An automatic testing device and method for concrete test blocks

Abstract

This invention relates to the field of test block testing technology, specifically to an automatic testing device and method for concrete test blocks. The device includes a support frame, a mounting plate fixed at the top of the support frame, a support rod fixed on the mounting plate, a fixing plate on the support rod, a pressure block sleeved on the support rod, and a pressure-applying power mechanism on the fixing plate, the output end of which is fixedly connected to the pressure block. A shelf is fixed at the bottom of the support frame, and a lifting mechanism is provided between the shelf and the mounting plate. A guide groove extends from the bottom of the mounting plate, and a slide is installed inside the guide groove. A flipping assembly is installed inside the slide, and a push plate is fixed on the flipping assembly. A second connecting rod is hinged to the end of the slide away from the lifting mechanism, and a flipping stop assembly is hinged to the end of the second connecting rod away from the slide. When the push plate pushes the test block to center, the flipping stop assembly unfolds through the connecting rod to form a barrier. When centering is completed and the push plate returns to its original position, the flipping stop assembly returns to a horizontal state, covering the flipping assembly to prevent it from being affected by test block debris and ensuring centering accuracy.

Description

Technical Field

[0001] This invention relates to the field of test block testing technology, specifically to an automatic testing device and method for concrete test blocks. Background Technology

[0002] Concrete test block testing typically involves removing standard-sized test blocks from the curing conditions after the specified curing period. First, a visual inspection and dimensional measurement are performed, and surface adhering substances are cleaned. Then, the test block is placed at the center of the bearing surface of a testing equipment such as a compression testing machine. The pressure surface and loading direction are adjusted, and a continuous and uniform loading regime is applied according to specifications until the test block fails. The maximum failure load is recorded, and indices such as compressive strength are calculated. If necessary, non-destructive testing methods such as rebound testing and ultrasonic testing can be used for auxiliary inspection and consistency assessment. The significance of this type of testing lies in verifying whether the mix design and construction curing meet standards using quantifiable strength and quality indicators. This provides a basis for structural bearing capacity calculation, project quality acceptance, and risk control. Simultaneously, it can promptly identify problems such as low strength or increased dispersion caused by raw material fluctuations, improper mixing and vibration, and insufficient curing, thereby guiding process adjustments and quality traceability, ensuring the safety, durability, and economy of the project.

[0003] Chinese patent document (publication number: CN120577106B) discloses a test device for compressive strength of concrete test blocks for hydraulic dam construction, comprising: a platform inside a press, the platform having a placement cavity; a positioning mechanism inside the placement cavity, the positioning mechanism including a transverse positioning component and a longitudinal positioning component, the transverse positioning component being connected to two sets of positioning frames arranged along the length of the platform, the longitudinal positioning component being connected to two sets of positioning frames arranged along the width of the platform, the longitudinal positioning component being synchronized with the transverse positioning component when the transverse positioning component moves, enabling the four sets of positioning frames to move closer to the center of the platform; a splash-proof component inside the press, the splash-proof component including a splash-proof door, the splash-proof component being connected to the transverse positioning component and the pressure-applying component respectively through a closing component and an opening component, when the transverse positioning component drives the positioning frame away from the center of the platform, the closing component drives the splash-proof component to close the splash-proof door, and during the rising of the pressure-applying component, the opening component drives the splash-proof component to open the splash-proof door.

[0004] In existing concrete test block testing, some test blocks require manual placement and centering, which is prone to offset and tilting, leading to repeated adjustments and unstable testing accuracy. When using a flipping assembly to center the test blocks, the flipping assembly may jam, jump, or overshoot, seriously affecting the stability of the device. During testing, concrete debris is prone to falling or splashing into the moving components, causing interference, wear, or even malfunctions, thus affecting safety and efficiency. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an automatic testing device and method for concrete test blocks. The test block is placed on a platform, and a vertically driven lifting plate, via a first connecting rod and a first hinge, drives a slide to reciprocate horizontally on a guide groove slide. During the slide's movement, a guide rod first slides within a horizontal through groove and, via a second connecting rod, drives a baffle to rotate around a shaft to a clearance position, making way for a rotation and centering mechanism. Subsequently, the guide rod enters an inclined groove, where, guided by the inclined groove, it drives an arc-shaped rod and an L-shaped plate to rotate around a first rotating rod, causing a pusher plate to rotate from a horizontal to a vertical position and push the concrete test block inwards from all sides to achieve automatic centering. The guide rod moves to the lowest point of the inclined groove... The point and the limiting plate work together, and the elastic resistance of the second tension spring achieves restricted guidance and angle transition control, suppressing jamming, jumping and overshooting during the flipping process, ensuring that the push plate can stably complete the flipping and reset. After centering, the carriage moves in the reverse direction to reset the push plate. At the same time, under the limiting action of the first tension spring, the T-slot and the T-rod, the baffle returns to the horizontal and covers the push plate and the flipping assembly, forming a shield and isolation for the internal moving components to prevent debris from falling or splashing in during the detection process and causing interference and wear. After the baffle completes the coverage, the detection process is started, thus achieving stable and high-precision detection under the conditions of automatic centering, smooth flipping and debris protection.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An automatic testing device for concrete test blocks includes a support frame. A shelf for supporting concrete test blocks is fixed to the top of the support frame. Support rods are fixed to the corners of the shelf. A fixing plate is installed on the top of each support rod. A pressure block is slidably fitted onto the support rod. A pressure-applying power mechanism is installed on the top of the fixing plate. The output end of the pressure-applying power mechanism slides through the fixing plate and is fixedly connected to the pressure block. A shelf is fixed to the bottom of the support frame. A lifting mechanism is installed between the shelf and the shelf. Guide grooves extend outwards from the bottom edge of the shelf. A sliding device is installed inside the guide groove. The slide is slidably installed in the guide slot units on both sides of the guide slot. One end of the slide is hinged to the lifting mechanism via a first connecting rod. A flipping component is rotatably installed inside the slide. A push plate is fixed on the flipping component. A second connecting rod is hinged to the end of the slide away from the lifting mechanism. A flipping block component is connected to the end of the second connecting rod away from the slide via a hinge. When the push plate pushes the test block to center, the flipping block component unfolds through the connecting rod to form a barrier. When the centering is completed and the push plate returns to its original position, the flipping block component returns to a horizontal state to cover the flipping component and prevent it from being affected by test block debris, thus ensuring the centering accuracy.

[0007] Preferably, the lifting mechanism includes a threaded rod, a lifting plate, and a motor. Multiple guide rods are fixed between the shelf and the storage plate, and the lifting plate is slidably sleeved on the guide rods. The end of the first connecting rod is connected to the edge of the lifting plate by a hinge. The motor is fixed at the bottom of the shelf, and the output end of the motor is fixed with a threaded rod. The threaded rod passes through the shelf and extends to the bottom of the storage plate. The threaded rod is rotatably installed with the shelf and the storage plate by bearings. The threaded rod passes through and is screwed to the lifting plate.

[0008] Preferably, the guide groove has two spaced-apart uprights, with a fixing plate connected to the same end of the two uprights. The other ends of the two uprights are fixedly connected to the outer edge of the shelf by welding. Each of the two uprights has a sliding table on its opposite inner side. The top of the slide has a U-shaped frame, and the bottom end of the U-shaped frame is integrally formed with a slider. The width of the slider is smaller than the width of the U-shaped frame. The bottom end of the slider extends outward along the width direction to form a limiting plate. The end of the slider near the lifting plate is connected to a first connecting rod through a first hinge. The U-shaped frame of the slide slides on the sliding table of the guide groove, and the slider of the slide slides in the groove formed by the opposing surfaces of the two sets of sliding tables. The top of the limiting plate of the slide slides against the bottom surface of the two uprights of the guide groove.

[0009] Preferably, the flipping assembly includes an inverted L-shaped plate, with a crossbar at the top. A push plate is fixed to one end of the crossbar, and the push plate is extended and widened outwards. An avoidance groove is formed on the vertical bar of the L-shaped plate, and the avoidance groove is in the same direction as the push plate. An arc-shaped plate is integrally formed at the bottom end of the vertical bar of the L-shaped plate, with the end of the arc-shaped plate extending away from the push plate. A guide rod is fixed to the end of the arc-shaped plate away from the L-shaped plate, and a first rotating rod is fixed to the other end of the arc-shaped plate. Arc-shaped grooves are provided on both sides of the U-shaped frame of the carriage. The guide rod slides through the arc-shaped grooves and extends to both ends and slides through the guide groove unit of the guide groove body. The two ends of the first rotating rod are rotatably installed in the U-shaped frame of the carriage through bearings. The push plate is installed facing the test block direction.

[0010] Preferably, the guide groove unit includes a horizontal through groove formed on two vertical plates of the guide groove body. Two inclined grooves are formed downwardly in the middle of the horizontal through groove. The two inclined grooves are symmetrically formed and their lowest points are connected. A guiding triangular protrusion is fixed on the inner wall of the horizontal through groove above the lowest point of the inclined groove. A cylindrical cavity is formed at the intersection of the two inclined grooves. A second rotating rod is rotatably installed in the cavity through a bearing. A limiting plate is fixed on the second rotating rod along its axis. The limiting plate rotates in the cavity. A connecting hole is formed at one end of the limiting plate. The connecting hole is connected to the bottom wall of the cavity through a second tension spring. The other end of the limiting plate extends outward to near the triangular protrusion.

[0011] Preferably, the tilting assembly includes baffles and cantilever arms. There are four cantilever arms, which are respectively fixed at the four corners of the support. A vertical rod is fixed to the end of the cantilever arm away from the support, and a shaft is fixed between adjacent vertical rods. There are four baffles, all of which are isosceles trapezoidal structures with a 45-degree angle. The upper bottom plate of the trapezoid of the baffle is close to the edge of the shelf, and the baffle is rotatably sleeved on the shaft near the lower bottom edge. A second connecting rod is connected to the bottom of the baffle and located at the lower bottom edge of the trapezoid through a second hinge. The other end of the second connecting rod is connected to the U-shaped frame of the carriage through a third hinge.

[0012] Preferably, the second connecting rod has a T-shaped groove with a through-groove structure, and a T-shaped rod slides through the T-shaped groove. A first tension spring is fixed at the bottom end of the T-shaped rod, and the other end of the first tension spring is fixedly connected to the outer wall of the guide groove. When the second connecting rod drives the baffle to rotate excessively around the shaft, the elastic potential energy of the first tension spring pulls the second connecting rod to return to its original path.

[0013] Preferably, the bottom end of the shelf has an opening corresponding to the guide groove and the second connecting rod; the bottom corner of the isosceles trapezoidal structure of the baffle is rounded to facilitate the installation and operation of the shaft; a support strip structure is fixed at the outer edge of the shelf 13 to support the baffle in a horizontal state.

[0014] Preferably, the arc-shaped plate is at a 45-degree angle to the vertical direction of the L-shaped plate vertical rod, and the arc-shaped plate matches the movement trajectory of the guide rod and the arc-shaped groove during the flipping process.

[0015] An automatic testing method for concrete test blocks includes the following steps: S1. Place the concrete test block to be tested on the shelf; S2. Drive the lifting plate to move vertically, so that the lifting plate drives the slide to move horizontally along the slide table in the guide groove through the first connecting rod and the first hinge. During the movement of the slide, the guide rod slides in the horizontal through groove of the guide groove unit. At the same time, the second connecting rod pulls the baffle to flip around the shaft to avoid it, providing space for the flipping and centering action of the flipping component. S3. When the guide rod enters the inclined groove, under the guidance of the inclined groove, it drives the arc rod and L-shaped plate to rotate around the first rotating rod. The push plates in the four directions flip 90 degrees from the horizontal state to the vertical state and simultaneously push inward from all sides of the concrete test block to complete the centering of the test block. S4. When the guide rod moves to the lowest point of the inclined groove and contacts the limiting plate, due to the elastic blocking effect of the second tension spring, the L-shaped plate is forced to rotate more than 45 degrees and then smoothly enter the inclined groove on the other side, so as to ensure that the push plate completes the 90-degree flip smoothly and in a controlled manner. S5. After centering is completed, the drive carriage moves in the opposite direction, and the guide rod runs in the opposite direction along the guide groove unit, causing the L-shaped plate and push plate to flip from the vertical state back to the horizontal state. Through the second connecting rod, the baffle is driven to return to the horizontal covering state under the limiting action of the first tension spring, T-shaped groove, and T-shaped rod, so that the baffle covers the flipping component to isolate and protect the flipping component, preventing concrete debris from splashing or falling and causing interference or damage during subsequent testing. After the baffle is covered, the pressure power mechanism is started to start the testing process of the concrete test block.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The device of the present invention achieves automatic centering and protection of the test block through linkage control, enabling the concrete test block to automatically complete position correction and posture adjustment before entering the testing process, thereby effectively avoiding the problems of offset, tilting and repeated adjustment caused by manual placement; while realizing rapid centering of the test block, the device can also synchronously shield and protect the internal moving components during the testing process, ensuring the stability and safety of the testing process, and ensuring the testing accuracy of the concrete test block and the overall work efficiency.

[0017] 2. The device of this invention establishes a linkage between the slide, guide rod, arc rod, and L-shaped plate, enabling the slide to synchronously drive the push plate to complete the flipping action from horizontal to vertical during horizontal movement. This allows the four push plates to apply force evenly from all sides of the concrete specimen when it is flipped to the vertical position, achieving automatic centering of the specimen. This flipping and centering process requires no manual intervention and can be completed continuously under a single drive condition, effectively avoiding the problem of positional error accumulation in the traditional manual centering process, ensuring that the specimen is always kept in the standard position required for testing.

[0018] 3. The device of the present invention, through the cooperation of the guide rod, the inclined groove, the limiting plate and the second tension spring, enables the L-shaped plate to be guided by a clear trajectory and elastically limited during the flipping process, thereby ensuring that the push plate can stably complete the flipping and achieve angle transition at key positions; the limited guide structure effectively prevents jamming, jumping or overshooting during the flipping process, making the flipping action smoother and more reliable, and can maintain consistent motion accuracy and structural stability even under long-term, high-frequency detection conditions.

[0019] 4. During the flipping and resetting phase, the device of the present invention drives the baffle to return to a horizontal covering state via the second linkage, so that the baffle covers the push plate and the flipping component, effectively shielding and isolating the internal moving parts, thereby preventing concrete debris generated during the testing process from falling or splashing into the flipping mechanism area; the testing process of the concrete test block is started after the baffle has completed its covering, so that the testing action is carried out in a safe and closed structural state, which not only improves the reliability of the testing process, but also significantly extends the service life of the internal moving components of the device. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the overall installation structure of the device of the present invention; Figure 2 A three-dimensional schematic diagram of the mounting structure below the baffle of the device of the present invention. Figure 1 ; Figure 3 A three-dimensional schematic diagram of the mounting structure below the baffle of the device of the present invention. Figure 2 ; Figure 4 This is a three-dimensional schematic diagram of the split structure below the baffle of the device of the present invention; Figure 5 This is a three-dimensional schematic diagram of the installation structure of the lifting mechanism of the device of the present invention; Figure 6 This is a three-dimensional schematic diagram of the horizontal structure of the flipping component of the device of the present invention. Figure 1 ; Figure 7 This is a three-dimensional schematic diagram of the horizontal structure of the flipping component of the device of the present invention. Figure 2 ; Figure 8 This is a three-dimensional schematic diagram of the vertically disassembled structure of the flipping component of the device of the present invention; Figure 9 This is a three-dimensional schematic diagram of the vertical installation structure of the flipping component of the device of the present invention; Figure 10 This is a three-dimensional schematic diagram of a partial structure of the guide groove unit of the device of the present invention; In the diagram: Bracket-11; Shelf-12; Storage board-13; Support rod-14; Pressure block-15; Fixing plate-16; Pressing power mechanism-17; Cantilever-19; Baffle-20; Motor-21; Lifting plate-22; Threaded rod-23; First connecting rod-24; Guide groove-25; Second connecting rod-26; Upright-27; Shaft-28; Clearance opening-29; Push plate-30; Slide-31; Horizontal through groove-32; T-slot -33; T-shaped rod -34; First tension spring -35; Inclined groove -36; Slider -37; Slide table -38; First hinge -39; L-shaped plate -40; Clearance groove -41; Arc plate -42; First rotating rod -43; Guide rod -44; Arc groove -45; Second hinge -46; Third hinge -47; Limiting plate -48; Second rotating rod -49; Connecting hole -50; Cavity -51; Second tension spring -52; Triangular protrusion -53. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

[0022] Contents not described in detail in this specification are prior art known to those skilled in the art. In the description of this invention, it should be understood that terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and 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, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Figures 1-10 As shown, an automatic testing device for concrete test blocks includes a support 11. A placement plate 13 for supporting concrete test blocks 18 is fixed to the top of the support 11. Support rods 14 are fixed to the corners of the placement plate 13. A fixing plate 16 is installed on the top of the support rods 14. A pressure block 15 is slidably sleeved on the support rods 14. A pressure-applying power mechanism 17 is installed on the top of the fixing plate 16. The output end of the pressure-applying power mechanism 17 slides through the fixing plate 16 and is fixedly connected to the pressure block 15. A shelf 12 is fixed to the bottom of the support 11, and a lifting mechanism is provided between the shelf 12 and the placement plate 13. Guide grooves 25 extend outward from the bottom edge of the placement plate 13. A slide 31 is slidably installed inside the body 25. The slide 31 is slidably installed in the guide slot units on both sides of the guide slot body 25. One end of the slide 31 is hinged to the lifting mechanism through the first connecting rod 24. A flipping component is rotatably installed inside the slide 31. A push plate 30 is fixed on the flipping component. A second connecting rod 26 is hinged to the end of the slide 31 away from the lifting mechanism. A flipping block component is connected to the end of the second connecting rod 26 away from the slide 31 through a hinge. When the push plate 30 pushes the test block 18 to center, the flipping block component unfolds through the connecting rod transmission to form a barrier. When the centering is completed and the push plate 30 returns to its position, the flipping block component returns to a horizontal state to cover the flipping component and prevent it from being affected by the fragments of the test block 18 to ensure the centering accuracy. It should be noted that the placement plate 13 is used to place the concrete test block 18. The placement plate 13 is thickened to bear the downward pressure of the pressure block 15, ensuring the stability of the structure and the accuracy of the test. The pressure-applying power mechanism 17 is a system that integrates power generation (hydraulic or electric), precision transmission (cylinder or lead screw), real-time measurement (force and displacement sensors), and intelligent control (computer or PLC); it belongs to existing technology, and the principle will not be explained in detail here.

[0024] The device of this invention achieves automatic centering and protection of the test block through coordinated control, enabling the concrete test block to automatically complete position correction and posture adjustment before entering the testing process. This effectively avoids the problems of offset, tilting and repeated adjustment caused by manual placement. While achieving rapid centering of the test block, the device can also synchronously shield and protect the internal moving components during the testing process, ensuring the stability and safety of the testing process, and guaranteeing the testing accuracy of the concrete test block and the overall work efficiency.

[0025] Furthermore, the lifting mechanism includes a threaded rod 23, a lifting plate 22, and a motor 21. Multiple guide rods are fixed between the shelf 12 and the shelf 13, and the lifting plate 22 is slidably sleeved on the guide rods. The end of the first connecting rod 24 is connected to the edge of the lifting plate 22 by a hinge. The motor 21 is fixed at the bottom end of the shelf 12, and the output end of the motor 21 is fixed with the threaded rod 23. The threaded rod 23 extends through the shelf 12 to the bottom end of the shelf 13. The threaded rod 23 is rotatably installed with the shelf and the shelf 13 by bearings. The threaded rod 23 passes through and is screwed to the lifting plate 22. When the motor 21 is started, the motor drives the threaded rod 23 to rotate, and the threaded rod 23 drives the screwed lifting plate 22 to move up and down, thereby driving the hinged first connecting rod 24 to move.

[0026] The aforementioned lifting mechanism is driven by motor 21 to rotate threaded rod 23. The threaded rod 23 is stably supported by bearings with the shelf 12 and the storage plate 13, and the rotation is converted into axial displacement of the lifting plate 22. The lifting plate 22 moves smoothly up and down in a straight line under the limiting guidance of multiple guide rods, thereby suppressing sway and jamming during the movement and improving transmission accuracy and repeatability. The first connecting rod 24 hinged at the edge of the lifting plate 22 is driven synchronously, and the lifting displacement is reliably output as the driving force and stroke control of the subsequent linkage mechanism, realizing synchronous, controllable and continuous adjustment of related actuators, and improving the overall operational stability and consistency of automated detection of the device.

[0027] The motor 21 is equipped with an external power supply and is electrically connected to the control system of the present invention. The motor, the control system and the connection method are all prior art and will not be described in detail here.

[0028] Furthermore, the guide groove 25 has two spaced-apart uprights, with a fixing plate connected to the same end of the two uprights. The other ends of the two uprights are fixedly connected to the outer edge of the shelf 13 by welding. Each of the two uprights has a slide table 38 on its opposite inner side. The top of the slide 31 has a U-shaped frame, and the bottom end of the U-shaped frame is integrally formed with a slider 37. The width of the slider 37 is smaller than the width of the U-shaped frame. The bottom end of the slider 37 extends outward along the width direction to form a limiting plate. The end of the slider 37 near the lifting plate 22 is connected to the first connecting rod 24 through the first hinge 39. The U-shaped frame of the slide 31 slides on the slide table 38 of the guide groove 25, and the slider 37 of the slide 31 slides in the groove formed by the opposite surfaces of the two sets of slide tables 38. The top of the limiting plate of the slide 31 slides against the bottom surface of the two uprights of the guide groove 25.

[0029] The guide groove 25 forms a stable guide frame through two spaced vertical plates. The guide groove 25 and the placement plate 13 form a rigid integrated installation reference. The two vertical plates are provided with sliding tables 38 on their inner sides to provide a straight guide surface. The U-shaped frame at the top of the carriage 31 slides on the sliding table 38. The slider 37 at the bottom of the U-shaped frame is embedded in the groove formed by the opposing surfaces of the two sets of sliding tables 38 to achieve double-sided constraint guidance. The limiting plate formed by the extension of the bottom end of the slider 37 slides against the bottom end surfaces of the two vertical plates of the guide groove 25 to limit the upward floating and disengagement of the carriage 31 and improve the stability of movement. At the same time, the end of the slider 37 near the lifting plate 22 is hinged to the first connecting rod 24 through the first hinge 39. When the lifting plate 22 moves up and down, it drives the first connecting rod 24 to swing and transmits the displacement to the carriage 31 through the first hinge 39, thereby driving the carriage 31 to move smoothly back and forth in the groove inside the guide groove 25, achieving the effects of smooth transmission, reliable guidance, strong anti-eccentric load capacity and high positioning consistency.

[0030] Furthermore, the flipping assembly includes an inverted L-shaped plate 40. The horizontal bar of the L-shaped plate 40 is located at the top. A push plate 30 is fixed at one end of the horizontal bar of the L-shaped plate 40. The push plate 30 is extended and widened outward. An avoidance groove 41 is opened on the vertical bar of the L-shaped plate 40. The avoidance groove 41 and the push plate 30 are in the same direction. An arc plate 42 is integrally formed at the bottom end of the vertical bar of the L-shaped plate 40. The end of the arc plate 42 extends away from the push plate 30. A guide rod 44 is fixed at the end of the arc plate 42 away from the L-shaped plate 40. A first rotating rod 43 is fixed at the other end of the arc plate 42. Arc grooves 45 are provided on both sides of the U-shaped frame of the slide 31. The guide rod 44 slides through the arc groove 45. The guide rod 44 extends to both ends and slides through the guide groove unit of the guide groove body 25. The two ends of the first rotating rod 43 are rotatably installed in the U-shaped frame of the slide 31 through bearings. The push plate 30 is installed towards the test block 18.

[0031] The flipping assembly forms a flippable actuator by inverting the L-shaped plate 40 to connect the push plate 30 and the carriage 31. The push plate 30 is fixed to the end of the horizontal bar of the L-shaped plate 40 and is lengthened and widened to expand the pushing contact range with the test block 18. The vertical bar of the L-shaped plate 40 is provided with a clearance groove 41 in the same direction as the push plate 30 to provide clearance for the edge of the placement plate 13 after flipping and centering. The guide rod 44 at the bottom of the vertical bar of the L-shaped plate 40 slides through the arc-shaped grooves 45 on both sides of the carriage 31 and extends to both ends into the guide groove unit of the guide groove body 25. The two ends of the first rotating rod 43 are rotatably mounted on the U-shaped frame of the carriage 31 through bearings. In the middle, when the slide 31 moves, the guide rod 44 and the guide groove unit cooperate to apply a controlled guiding and constraint torque to the L-shaped plate 40, so that the L-shaped plate 40 and the push plate 30 rotate 90 degrees from the horizontal state to the vertical state, so that the push plates 30 on all sides push against and push the test block 18 to the center position to complete the centering; in the reset stage, the guide rod 44 continues to guide and slide in the arc groove 45 and the guide groove unit, driving the vertical L-shaped plate 40 and the push plate 30 to flip back to the horizontal state, thereby reducing the space occupied above and avoiding interference with the baffle 20, improving the compactness of the mechanism layout and the reliability of the operation.

[0032] Furthermore, the guide groove unit includes a horizontal through groove 32 formed on two vertical plates of the guide groove body 25. Two inclined grooves 36 are formed downwardly in the middle of the horizontal through groove 32. The two inclined grooves 36 are symmetrically formed and their lowest points are connected. A guide triangular protrusion 53 is fixed on the inner wall of the horizontal through groove 32 above the lowest point of the inclined groove 36. A cylindrical cavity 51 is formed at the intersection of the two inclined grooves 36. A second rotating rod 49 is rotatably installed in the cavity 51 through a bearing. A limiting plate 48 is fixed on the second rotating rod 49 along its axis. The limiting plate 48 rotates in the cavity 51. A connecting hole 50 is formed at one end of the limiting plate 48. The connecting hole 50 is connected to the bottom wall of the cavity 51 through a second tension spring 52. The other end of the limiting plate 48 extends outward to near the triangular protrusion 53. It should be noted that the triangular protrusion 53 and the inclined groove 36 form two intersecting channels, which are used to change the orientation of the L-shaped plate 40.

[0033] The guide slot unit forms a composite guide structure by opening horizontal through slots 32 on the two vertical plates of the guide slot body 25 and symmetrically setting two inclined slots 36 downward in the middle. The two inclined slots 36 are connected to each other at the lowest point, and a triangular protrusion 53 is fixed on the inner wall of the horizontal through slot 32 above the lowest point of the inclined slot 36, so that the horizontal through slot 32 and the inclined slot 36 together form two intersecting guide channels for converting the movement trajectory and orientation of the inverted L-shaped plate 40. A cylindrical cavity 51 is set at the intersection of the two inclined slots 36. A second rotating rod 49 is rotatably installed in the cavity 51 through a bearing. A limiting plate 48 is fixed on the second rotating rod 49 along the axis and rotated in the cavity 51. One end of the limiting plate 48 is provided with a connecting hole 50 and is elastically connected to the bottom wall of the cavity 51 through a second tension spring 52. The other end extends outward and is set close to the triangular protrusion 53, thereby forming a steering control structure with elastic damping and limiting functions. When the carriage 31 moves horizontally along the guide groove 25 under the drive of the first connecting rod 24, the guide rod 44 first slides smoothly in the horizontal through groove 32, then enters the inclined groove 36 and drives the arc plate 42 and L-shaped plate 40 to rotate synchronously around the first rotating rod 43 under the oblique constraint of the inclined groove 36. When the guide rod 44 slides from one side to the lowest point along the inclined groove 36 and continues to slide out of the other side of the inclined groove 36, the L-shaped plate 40 completes a 90-degree turn. When the guide rod 44 rotates to the bottom of the inclined groove 36 and contacts the limiting plate 48, the limiting plate 48 provides moderate resistance to the guide rod 44 under the elastic action of the second tension spring 52, forcing the L-shaped plate 40 to smoothly enter the other side of the inclined groove 36 after the rotation angle exceeds 45 degrees. This ensures that the L-shaped plate 40 achieves a smooth, continuous and controlled 90-degree flip around the first rotating rod 43, improving the reliability and consistency of the flipping process.

[0034] Furthermore, the tilting assembly includes baffles 20 and cantilever arms 19. There are four cantilever arms 19, which are respectively fixed at the four corners of the support 11. A vertical rod 27 is fixed at one end of the cantilever arm 19 away from the support 11, and a shaft 28 is fixed between adjacent vertical rods 27. There are four baffles 20, all of which are isosceles trapezoidal structures with a 45-degree angle. The upper bottom plate of the trapezoid of the baffle 20 is close to the edge of the placement plate 13, and the baffle 20 is rotatably sleeved on the shaft 28 near the lower bottom edge. At the bottom end of the baffle 20 and located at the lower bottom edge of the trapezoid, a second connecting rod 26 is connected by a second hinge 46. The other end of the second connecting rod 26 is connected to the U-shaped frame of the slide 31 by a third hinge 47.

[0035] The flip-up assembly provides protection and avoidance control for the flip-up assembly through the linkage structure of the baffle 20 and the second connecting rod 26. All four baffles 20 are set with an isosceles trapezoidal structure at a 45-degree angle. The upper bottom edge of the trapezoid of the baffle 20 is arranged close to the edge of the shelf 13. The baffle 20 is rotated and sleeved on the shaft 28 at its lower bottom edge, so that the baffle 20 can flip around the shaft 28. The bottom end of the baffle 20 is connected to the second connecting rod 26 through the second hinge 46. The other end of the second connecting rod 26 is then hinged to the U-shaped frame of the carriage 31 through the third hinge 47, thereby synchronously transmitting the motion state of the carriage 31 to the baffle 20. When the carriage 31 moves toward the placement plate 13 under the drive of the first connecting rod 24 and performs the test block centering operation, the guide rod 44 first slides horizontally in the horizontal through groove 32. During this stage, the second connecting rod 26 pulls the baffle 20 to flip outward to provide the necessary space for the flipping process of the L-shaped plate 40 and the push plate 30, avoiding structural interference. When the push plate 30 completes the centering operation and resets in the opposite direction with the carriage 31, the L-shaped plate 40 flips to the horizontal position first. Then, the second connecting rod 26 drives the baffle 20 to rotate back to the horizontal covering position. The four isosceles trapezoidal baffles 20 cooperate to form a enclosure and isolation for the flipping component below. This not only effectively prevents the debris generated by the crushing of the concrete test block during the testing process from splashing and impacting the flipping component and causing damage, but also reduces the accumulation of debris covering the surface of the flipping component, thereby avoiding affecting the sensitivity and accuracy of subsequent centering actions and improving the overall reliability and testing stability of the device.

[0036] Furthermore, the second connecting rod 26 is provided with a T-shaped groove 33 with a through-groove structure, and a T-shaped rod 34 slides through the T-shaped groove 33. A first tension spring 35 is fixed at the bottom end of the T-shaped rod 34, and the other end of the first tension spring 35 is fixedly connected to the outer wall of the guide groove 25. When the second connecting rod 26 drives the baffle 20 to rotate excessively around the shaft 28, the elastic potential energy of the first tension spring 35 pulls the second connecting rod 26 to return to its original path.

[0037] It should be noted that the crossbar of the T-shaped rod 34 can also be set as an inverted round cap, which facilitates sliding guidance while reducing resistance with the T-shaped groove 33.

[0038] By providing a T-shaped groove 33 with a through-groove structure on the second connecting rod 26, and sliding a T-shaped rod 34 through the T-shaped groove 33, the second connecting rod 26 obtains a limited relative sliding stroke while driving the baffle 20 to rotate. A first tension spring 35 is fixed at the bottom end of the T-shaped rod 34, and the other end of the first tension spring 35 is fixedly connected to the outer wall of the guide groove 25, thereby applying a continuous elastic traction force to the second connecting rod 26 when it is displaced. When the second connecting rod 26 drives the baffle 20 to rotate excessively around the shaft 28, the first tension spring 35 is stretched and stores elastic potential energy, which is then released during the reset phase through the traction generated by the retraction. Gravity causes the second link 26 to move in the opposite direction along its original motion path and drives the baffle 20 to reliably reset. Especially when the baffle 20 is excessively pulled by the second link 26, causing the shaft 28, the second hinge 46, and the third hinge 47 to tend to be on the same straight line, the rotation direction of the baffle 20 during reset may be uncertain or deviate. By limiting the T-shaped groove 33 with the T-shaped rod 34 and providing the directional return force with the first tension spring 35, the second link 26 and the baffle 20 can be effectively limited to reset along a predetermined trajectory, avoiding accidental flipping or jamming, and improving the stability and reliability of the flipping assembly.

[0039] Furthermore, an avoidance opening 29 is provided at the bottom end of the shelf 13 corresponding to the guide groove 25 and the second connecting rod 26; a rounded corner is provided at the bottom corner of the isosceles trapezoidal structure of the baffle 20 to facilitate the installation and operation of the shaft; a support strip structure is fixed at the outer edge of the shelf 13 to support the baffle 20 in a horizontal state.

[0040] The bottom end of the shelf 13 has a clearance opening 29 at the position corresponding to the guide groove 25 and the second connecting rod 26, providing clearance space for the reciprocating motion or flipping action of the carriage 31 and the second connecting rod 26, avoiding collision and interference with the shelf 13 and reducing running resistance; the baffle 20 has rounded corners at the bottom corners of the isosceles trapezoidal structure, making the assembly of the baffle 20 at the shaft 28 smoother and reducing scratches and stress concentration during the flipping process, thereby improving rotational flexibility and service life; at the same time, a support strip structure is fixed on the outer edge of the shelf 13 to provide support and limit the baffle 20 in the horizontal state, so that the baffle 20 remains flat and stable in the covered position, avoiding sagging and swaying and enhancing the shielding and protection effect on the flipping component below.

[0041] Furthermore, the arc-shaped plate 42 is set at a 45-degree angle to the vertical direction of the vertical rod of the L-shaped plate 40, so that the arc-shaped plate 42 matches the movement trajectory of the guide rod 44 and the arc-shaped groove 45 during the flipping process. Thus, after the L-shaped plate 40 rotates 90 degrees, the guide rod 44 still remains in a restricted guiding state on the same straight line. The arc-shaped groove 45 forms a corresponding constraint on the rotation path of the guide rod 44, which plays a role in limiting the flipping angle and movement direction, ensuring that the flipping process of the L-shaped plate 40 and the push plate 30 is smooth, accurate and without deviation or jamming, thereby improving the consistency and reliability of the flipping component's operation.

[0042] An automatic testing method for concrete test blocks includes the following steps: S1. Place the concrete test block 18 to be tested on the placement plate 13; S2. Drive the lifting plate 22 to move vertically, so that the lifting plate 22 drives the slide 31 to move horizontally along the slide table 38 in the guide groove 25 via the first connecting rod 24 and the first hinge 39. During the movement of the slide 31, the guide rod 44 slides in the horizontal through groove 32 of the guide groove unit. At the same time, the second connecting rod 26 pulls the baffle 20 to rotate around the shaft 28 to form a clearance, providing space for the rotation and centering action of the rotation component. S3. When the guide rod 44 enters the inclined groove 36, under the guidance of the inclined groove 36, the arc rod 42 and the L-shaped plate 40 rotate around the first rotating rod 43. The push plates 30 in the four directions flip 90 degrees from the horizontal state to the vertical state and simultaneously push inward from all sides of the concrete test block 18 to complete the centering of the test block. S4. When the guide rod 44 moves to the lowest point of the inclined groove 36 and contacts the limiting plate 48, due to the elastic blocking effect of the second tension spring 52, the L-shaped plate 40 is forced to rotate more than 45 degrees and smoothly enter the other inclined groove 36, so as to ensure that the push plate 30 completes the 90-degree flip smoothly and in a controlled manner. S5. After centering is completed, the drive carriage 31 moves in the opposite direction, and the guide rod 44 runs in the opposite direction along the guide groove unit, causing the L-shaped plate 40 and the push plate 30 to flip from the vertical state back to the horizontal state. Through the second connecting rod 26, the baffle 20 is driven to return to the horizontal covering state under the limiting cooperation of the first tension spring 35, the T-shaped groove 33, and the T-shaped rod 34, so that the baffle 20 covers the flipping component to isolate and protect the flipping component, preventing concrete debris from splashing or falling and causing interference or damage during subsequent testing. After the baffle 20 is covered, the pressure power mechanism 17 is started to conduct the testing process of the concrete test block 18.

[0043] The present invention has been illustrated through the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that all related improvements to the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. An automatic testing device for concrete test blocks, comprising a support (11), a placement plate (13) for supporting concrete test blocks (18) fixedly mounted on the top of the support (11), support rods (14) fixedly mounted at the corners of the placement plate (13), a fixing plate (16) mounted on the top of the support rods (14), a pressure block (15) slidably mounted on the support rods (14), a pressure-applying power mechanism (17) mounted on the top of the fixing plate (16), and the output end of the pressure-applying power mechanism (17) slidably passing through the fixing plate (16) and then fixedly connected to the pressure block (15); characterized in that, A shelf (12) is fixed to the bottom of the bracket (11), and a lifting mechanism is provided between the shelf (12) and the shelf (13). Guide grooves (25) are fixedly extended from the bottom end of the shelf (13) along the edge of the shelf. A slide (31) is slidably installed inside the guide groove (25). The slide (31) is slidably installed in the guide groove units on both sides of the guide groove (25). One end of the slide (31) is hinged to the lifting mechanism through the first connecting rod (24). A flip-up mechanism is rotatably installed inside the slide (31). The rotating assembly has a push plate (30) fixed on it. The end of the slide (31) away from the lifting mechanism is hinged to a second link (26). The end of the second link (26) away from the slide (31) is connected to a flip-block assembly by a hinge. When the push plate (30) pushes the test block (18) to center, the flip-block assembly unfolds through the linkage to form a barrier. When the centering is completed and the push plate (30) returns to its original position, the flip-block assembly returns to a horizontal state to cover the rotating assembly and prevent it from being affected by the debris of the test block (18) to ensure the centering accuracy.

2. The automatic testing device for concrete test blocks according to claim 1, characterized in that, The lifting mechanism includes a threaded rod (23), a lifting plate (22), and a motor (21). Multiple guide rods are fixed between the shelf (12) and the shelf (13). The lifting plate (22) is slidably sleeved on the guide rods. The end of the first connecting rod (24) is connected to the edge of the lifting plate (22) by a hinge. The motor (21) is fixed at the bottom of the shelf (12). The output end of the motor (21) is fixed with the threaded rod (23). The threaded rod (23) extends through the shelf (12) to the bottom of the shelf (13). The threaded rod (23) is rotatably installed with the shelf and the shelf (13) by bearings. The threaded rod (23) passes through and is screwed to the lifting plate (22).

3. The automatic testing device for concrete test blocks according to claim 1, characterized in that, The guide groove (25) has two vertical plates spaced apart. A fixing plate is connected to the same end of the two vertical plates. The other ends of the two vertical plates are fixedly connected to the outer edge of the placement plate (13) by welding. The inner sides of the two vertical plates each have a sliding table (38). The top of the slide (31) has a U-shaped frame. The bottom end of the U-shaped frame is integrally formed with a slider (37). The width of the slider (37) is smaller than the width of the U-shaped frame. The bottom end of the slider (37) extends outward along the width direction to form a limiting plate. The end of the slider (37) near the lifting plate (22) is connected to the first connecting rod (24) through the first hinge (39). The U-shaped frame of the slide (31) slides on the sliding table (38) of the guide groove (25). The slider (37) of the slide (31) slides in the groove formed by the opposite surfaces of the two sets of sliding tables (38). The top of the limiting plate of the slide (31) slides against the bottom surface of the two vertical plates of the guide groove (25).

4. The automatic testing device for concrete test blocks according to claim 3, characterized in that, The flipping assembly includes an inverted L-shaped plate (40), with a horizontal bar at the top. A push plate (30) is fixed to one end of the horizontal bar, and the push plate (30) is extended and widened outwards. An avoidance groove (41) is formed on the vertical bar of the L-shaped plate (40), and the avoidance groove (41) and the push plate (30) are in the same direction. An arc-shaped plate (42) is integrally formed at the bottom end of the vertical bar of the L-shaped plate (40), and the end of the arc-shaped plate (42) extends away from the push plate (30). A guide rod (44) is fixed at one end of the slide (31), and a first rotating rod (43) is fixed at the other end of the arc plate (42). Arc grooves (45) are provided on both sides of the U-shaped frame of the slide (31). The guide rod (44) slides through the arc groove (45). The guide rod (44) extends to both ends and slides through the guide groove unit of the guide groove body (25). The two ends of the first rotating rod (43) are rotatably installed in the U-shaped frame of the slide (31) through bearings. The push plate (30) is installed in the direction of the test block (18).

5. The automatic testing device for concrete test blocks according to claim 4, characterized in that, The guide groove unit includes a horizontal through groove (32) formed on two vertical plates of the guide groove body (25). Two inclined grooves (36) are formed downwards in the middle of the horizontal through groove (32), symmetrically formed, with their lowest points connected. A guiding triangular protrusion (53) is fixed on the inner wall of the horizontal through groove (32) above the lowest point of the inclined groove (36). A cylindrical cavity is formed at the intersection of the two inclined grooves (36). 51) A second rotating rod (49) is installed in the cavity (51) by rotating the bearing. A limiting plate (48) is fixed on the second rotating rod (49) along the axis. The limiting plate (48) rotates in the cavity (51). A connecting hole (50) is opened at one end of the limiting plate (48). The connecting hole (50) is connected to the bottom wall of the cavity (51) by a second tension spring (52). The other end of the limiting plate (48) extends outward to near the triangular protrusion (53).

6. The automatic testing device for concrete test blocks according to claim 5, characterized in that, The flip-up assembly includes a baffle (20) and a cantilever (19). There are four cantilever (19) and they are fixed at the four corners of the support (11). A pole (27) is fixed at one end of the cantilever (19) away from the support (11). A shaft (28) is fixed between adjacent poles (27). There are four baffles (20) and they are all isosceles trapezoidal structures with a 45-degree angle. The upper bottom plate of the trapezoid of the baffle (20) is close to the edge of the shelf (13). The baffle (20) is rotatably sleeved on the shaft (28) near the lower bottom edge. The second connecting rod (26) is connected to the bottom of the baffle (20) and located at the lower bottom edge of the trapezoid through a second hinge (46). The other end of the second connecting rod (26) is connected to the U-shaped frame of the carriage (31) through a third hinge (47).

7. The automatic testing device for concrete test blocks according to claim 6, characterized in that, The second connecting rod (26) has a T-shaped groove (33) with a through groove structure. A T-shaped rod (34) slides through the T-shaped groove (33). A first tension spring (35) is fixed at the bottom end of the T-shaped rod (34). The other end of the first tension spring (35) is fixedly connected to the outer wall of the guide groove (25). When the second connecting rod (26) drives the baffle (20) to rotate excessively around the shaft (28), the elastic potential energy of the first tension spring (35) pulls the second connecting rod (26) to reset along the original path.

8. The automatic testing device for concrete test blocks according to claim 6, characterized in that, The bottom end of the shelf (13) is provided with a clearance opening (29) corresponding to the guide groove (25) and the second connecting rod (26); a rounded corner is provided at the bottom corner of the isosceles trapezoidal structure of the baffle (20) to facilitate the installation and operation of the shaft; a support strip structure is fixed at the outer edge of the shelf 13 to support the baffle (20) in a horizontal state.

9. The automatic testing device for concrete test blocks according to claim 4, characterized in that, The arc plate (42) is at a 45-degree angle to the vertical direction of the vertical rod of the L-shaped plate (40), and the arc plate (42) matches the movement trajectory of the guide rod (44) and the arc groove (45) during the flipping process.

10. An automatic testing method for concrete test blocks, applied to the automatic testing device for concrete test blocks according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Place the concrete test block (18) to be tested on the placement board (13); S2. Drive the lifting plate (22) to move vertically, so that the lifting plate (22) drives the slide (31) to move horizontally along the slide table (38) in the guide groove (25) via the first connecting rod (24) and the first hinge (39). During the movement of the slide (31), the guide rod (44) slides in the horizontal through groove (32) of the guide groove unit. At the same time, the second connecting rod (26) pulls the baffle (20) to rotate around the shaft (28) to form a clearance, providing space for the rotation and centering action of the rotation component. S3. When the guide rod (44) enters the inclined groove (36), under the guidance of the inclined groove (36), the arc rod (42) and the L-shaped plate (40) rotate around the first rotating rod (43). The push plates (30) in the four directions flip 90 degrees from the horizontal state to the vertical state and simultaneously push inward from all sides of the concrete test block (18) to complete the centering of the test block. S4. When the guide rod (44) moves to the lowest point of the inclined groove (36) and contacts the limiting plate (48), due to the elastic blocking effect of the second tension spring (52), the L-shaped plate (40) is forced to rotate more than 45 degrees and smoothly enter the other side inclined groove (36) to ensure that the push plate (30) completes the 90-degree flip smoothly and in a controlled manner. S5. After centering is completed, the drive carriage (31) moves in the opposite direction, and the guide rod (44) runs in the opposite direction along the guide groove unit, causing the L-shaped plate (40) and push plate (30) to flip from the vertical state back to the horizontal state. Through the second connecting rod (26), the baffle (20) is driven to return to the horizontal covering state under the limiting cooperation of the first tension spring (35), T-shaped groove (33), and T-shaped rod (34), so that the baffle (20) covers the flipping component to isolate and protect the flipping component, prevent concrete debris from splashing or falling and causing interference or damage during subsequent testing, and start the pressure power mechanism (17) to test the concrete test block (18) after the baffle (20) is covered.

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