Concrete test block strength detection equipment

Abstract

The invention discloses concrete test block strength detection equipment, and belongs to the technical field of civil engineering material detection equipment. Comprising an external frame mechanism, a supporting module and a vertical loading mechanism, an external motor and a reciprocating friction part are arranged, reciprocating loading is performed on the edge area of a test block by means of an inclined contact edge, the stress state of the concrete edge under actual stress conditions such as bending and shearing is simulated, the breaking strength and the elastic modulus of the concrete can be accurately detected, and the test efficiency is improved. A friction loading mechanism is used for measuring the local elastic modulus of the edge of a test block and the microcosmic crack propagation characteristics, test data support is provided for structural analysis, material selection and durability evaluation, the device can be wholly overturned by 90 degrees, detection is carried out in a transverse posture, the working stress state of a beam and slab type concrete member is more truly simulated, and the test efficiency is improved. The engineering representativeness and the application value of a detection result are improved, and after detection is completed, ordered classification and temporary storage of the test blocks are completed through cooperation of a turnover supporting arm and a storage structure.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering material testing equipment, and particularly to a concrete test block strength testing equipment. Background Art

[0002] As one of the most widely used structural materials in modern construction projects, the mechanical properties of concrete directly affect the safety and durability of the entire structural system. To ensure that concrete components meet the design strength requirements, it is often necessary to test the strength of concrete test blocks before, during, and after construction, especially key performance indicators such as compressive strength, flexural strength, and elastic modulus.

[0003] Currently, the strength testing of concrete test blocks mainly relies on traditional presses or flexural test equipment, usually using manual clamping and separate loading methods. Such methods have the following significant problems: the test block clamping is unstable, prone to sliding or offset, affecting the loading accuracy and test results; there is a lack of means to detect the performance of the edge or local area of the test block, and it is impossible to accurately evaluate the edge flexural performance or local elastic response; the equipment structure is single, unable to achieve multi-angle loading in the axial and transverse directions, and it is difficult to simulate the mechanical behavior of actual components under complex loading conditions; With the continuous improvement of the safety assessment standards for concrete structures, there is an urgent need for a multi-functional testing equipment with a reasonable structure, strong adaptability, and the ability of automatic loading, self-alignment, and edge response detection to improve the efficiency, accuracy, and engineering applicability of the mechanical property testing of concrete test blocks. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art and propose a concrete test block strength testing equipment.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A concrete test block strength detection device, comprising an external frame mechanism, a support module and a vertical loading mechanism. The support module is installed in the inner cavity of the external frame mechanism, and the vertical loading mechanism is vertically arranged at the middle position of the support module. The support module includes a main bearing bracket and an arrangement forming mechanism installed on the side end face of the main bearing bracket. The bottom edge position of the main bearing bracket extends to install a support platform connecting plate, and load test plates are vertically arranged and laid on the upper end face of the support platform connecting plate. The other end of the load test plate is connected to the main bearing bracket through a transverse connecting rod. Place the concrete test block to be subjected to strength detection directly above the concrete test block placement platform. Since the upper part of the inclined triangular limiting component is triangular, the concrete test block is placed on the inclined side. Through the overall movement of the vertical loading mechanism, the loading moving component and the bottom loading response mechanism move in the same direction. Place the concrete test block for pressing at the interval between the two upper loading platforms. When the self-weight of the concrete test block presses down on the upper loading platform and the upper and lower loading connecting parts, the vertical slider at the bottom moves downward along the vertical slide rail. While the vertical loading mechanism presses downward, it can also push the loading moving component to move in the same direction, playing a role of self-positioning and stable support, effectively preventing the test block from sliding or shifting during the detection process. Through the overall movement of the upper structure vertical loading mechanism, the lower connecting component loading moving component and the bottom loading response mechanism are driven to move in the same direction synergistically, realizing synchronous loading of multiple components, simplifying the operation process of the operator, and improving the loading efficiency and structural coordination.

[0006] The support module further includes a transverse connecting shaft connected to the interval between two transversely oppositely arranged transverse connecting rods. The outer circle of the four transverse connecting shafts is slidably connected with a sliding outer circle component. The sliding outer circle component includes four arranged sliding seats and a sliding connecting plate A and a sliding connecting plate B for connecting the four sliding seats. A loading moving component is vertically inserted through the gap between the two groups of sliding connecting plates B. The loading moving component includes two magnetically attracted magnetic loading columns. A central loading rod is inserted through the middle positions of the two magnetic loading columns. A height adjusting member is slidably sleeved on the outer circles of the two magnetic loading columns. Workers can vertically adjust the height adjusting member sleeved on the outer circles of the magnetic loading columns according to the weight of the concrete test block to be inspected. When the size of the concrete test block for pressing is larger than the test block placed on the concrete test block placement platform of the base, the height adjusting member can be lifted upward, so that the length of the magnetic loading column below it will elongate accordingly, so that the bottom of the central loading rod can closely adhere to the upper surface of the concrete test block to be inspected. Under the action of the gravity of the upper concrete test block, the two magnetic loading columns will apply pressure to both sides along the upper end surface of the test block to be inspected. The bottom end surfaces of the two magnetic loading columns and the reciprocating friction components apply symmetric pressure to both sides along the upper end surface of the test block, which can effectively ensure that the test block to be inspected is uniformly stressed during the detection process, avoid structural damage or misjudgment caused by eccentric compression, and thus realize the pressing detection of the concrete test block. During the detection process, by applying an axial pressure to the test block, its axial compressive strength is measured. This strength can more accurately reflect the bearing capacity of the concrete in the actual axially compressed member, and has direct reference value for the design and evaluation of the axially compressed member of the concrete structure; allowing the test block to produce a certain amount of bending deformation during compression, or by adjusting the placement method and loading method of the test block, the flexural strength of the concrete can also be indirectly detected. The flexural strength reflects the ability of the concrete to resist bending failure, and is of great significance for evaluating the flexural members and crack resistance performance in the concrete structure; During the detection, the test block is in an axially compressed state, which can more truly reflect the stress condition of the structural member in the project, and provides a reliable basis for the design and checking calculation of the concrete structure. By adjusting the loading method or the placement method of the test block, a bending effect can be induced in the test block, so as to indirectly evaluate the flexural strength of the concrete, which is suitable for the analysis of flexural members.

[0007] When the size of the concrete test block for pressing is smaller than or equal to the test block placed on the concrete test block placement platform of the base, the height adjusting member can be moved downward to the bottommost position of the magnetic loading column, so that the magnetic loading column and the central loading rod press the concrete test block downward at the same time for detection. Without the need to prepare special fixtures additionally, test blocks of different specifications can be detected, expanding the application range of the equipment. It can stably apply pressure to small test blocks, ensure the uniform distribution of force, and thus obtain more accurate strength data, avoiding measurement errors or detection difficulties caused by the small size of the test block. During the detection process, the cooperation of the magnetic loading column and the central loading rod can reduce the offset or tilt of the test block during compression, improving the repeatability and reliability of the detection, which is particularly important for small-sized test blocks because they are more susceptible to the influence of uneven force distribution.

[0008] Preferably, the main bearing bracket includes a bracket body and a rotatable support arm mounted on the upper end face of the bracket body. The two relatively arranged rotatable support arms are hinged to each other, and the two rotatable support arms are connected in series through a hinge shaft. When the concrete test block is completed with the test, the two rotatable support arms arranged on both sides of the device can rotate around the hinge shaft below them as a rotation fulcrum, so that the main bearing bracket of the originally vertically installed structure rotates to a horizontally parallel placement state; after the rotation is completed, the tested concrete test block can be placed into the arranged forming mechanism of the storage structure for arranged forming, which is convenient for unified classification management. At this time, the structure of the main bearing bracket after flipping can also be used to support the end of the inclined triangular limiting component of the upper structure, playing an auxiliary supporting role and enhancing the stability of the whole system and the convenience of subsequent operations.

[0009] Preferably, the bottom of the magnetic attraction loading column is connected to the upper end face of the bottom loading response mechanism, and the bottom loading response mechanism includes two relatively arranged reciprocating friction components and inclined contact edges opened at the bottom positions of the two reciprocating friction components.

[0010] Preferably, the upper end face of one of the reciprocating friction components is connected to the bottom of the magnetic attraction loading column on one side, and the bottom positions of the two reciprocating friction components are set at a relative inclination angle.

[0011] Preferably, the external frame mechanism includes side frames and limiting brackets opened on both sides of the side frames. A horizontal connecting piece is horizontally installed on the inner end face of the limiting brackets. In the middle of the bottom of the inner cavity of the side frames, a concrete test block placement platform is installed. The other end of the horizontal connecting piece fits on the upper end face of the concrete test block placement platform, and the concrete test block placement platform horizontally penetrates through the intervals of the test plates.

[0012] Preferably, the concrete test block placement platform includes a base body and base two-side limiting mechanisms installed on both sides of the edge of the side end face of the base body. The other ends of the base two-side limiting mechanisms are installed with limiting strips, and an inclined triangular limiting component is installed at the interval between the two limiting strips.

[0013] Preferably, the vertical loading mechanism includes a vertical slide rail vertically installed in the middle of the side end face of the side frame. Two vertical sliders are vertically slidably connected to the front end face of the vertical slide rail. The two vertical sliders are relatively arranged with upper and lower loading connecting pieces, and the other ends of the upper and lower loading connecting pieces are provided with upper loading platforms. To further accurately detect the flexural strength and elastic modulus of the edge position of the concrete test block, the device is provided with a set of structured loading and friction response detection mechanism. This mechanism includes an external motor installed in the middle of the upper loading platform, the output end of which is vertically downward, and generates periodic impact force through a reciprocating driving method during operation.

[0014] The external motor applies impact loading to the loading platform, driving the vertical loading mechanism of the upper structure and the overall moving component connected below it to press down on the loading moving component. When the loading moving component moves downward, the structural member reciprocating friction component connected to its bottom begins to act on the edge area of the concrete test block.

[0015] The bottom of the reciprocating friction component is provided with an inclined structure and an inclined contact edge, which will produce inclined contact and friction with the edges of both end faces of the concrete test block during the movement, forming force loading. Under the continuous reciprocating drive of the external motor, the reciprocating friction component slides in a reciprocating impact manner along the two side edges of the test block, so that the edge area of the concrete test block bears repeated loading.

[0016] This loading method simulates the complex stress state suffered by the edge of the test block in the actual component, and can test the edge flexural performance of concrete under local bending, shear or combined action. At the same time, by measuring the deformation amount during the force application process, the edge elastic modulus response of concrete in this local area can be evaluated, providing experimental basic data for high-precision structural analysis.

[0017] After the whole device is turned over by 90 degrees, lateral loading can be applied to the concrete test block, which is closer to the force-bearing form of beam-type and slab-type concrete components in the actual structure during the working state, improving the engineering adaptability and representativeness of the test results.

[0018] The device can complete the detection operation in both vertical and lateral postures, and is compatible with axial compressive strength detection and flexural, shear or lateral pressure strength detection, greatly enhancing the applicable range and detection ability of the equipment. In the lateral state, the contact surface between the edge of the test block and the two side structures is more sufficient, which is helpful for implementing refined analysis projects such as edge compression performance test, local stress concentration research and microcrack propagation monitoring.

[0019] After flipping, the test block can be more stably clamped into the lateral limiting device. Especially for long-strip or non-standard-shaped test blocks, the risk of lateral offset or sliding can be significantly reduced, enhancing the repeatability of the test and the accuracy of the results. The same set of structure can be adapted to force detections in different directions after flipping, avoiding configuring multiple independent devices for different detection conditions, saving space and cost, and improving the comprehensive utilization rate of the equipment.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: By setting the inclined triangular limiting component, the concrete test block placed on the platform can be automatically aligned and stably fitted under the action of gravity, avoiding the offset of the test block during the detection process, improving the loading accuracy and test repeatability. The vertical loading mechanism drives the loading moving component and the bottom loading response mechanism to achieve synchronous pressing, simplifying the operation process, improving the loading efficiency, enhancing the structural coordination performance, and reducing the manual intervention operation.

[0021] The height adjustment component can adjust the effective length of the magnetic adsorption loading column to meet the loading requirements of test blocks of different sizes. Without the need to replace the clamping tool, it improves the adaptability of the equipment, saves the detection time and equipment cost. For test blocks with smaller sizes, the height adjustment component can be lowered to achieve synchronous loading of the magnetic adsorption loading column and the central loading rod, ensuring uniform stress and avoiding misjudgment or data fluctuations caused by loading deviation, thereby improving the detection reliability.

[0022] An external motor and a reciprocating friction component are set up to perform reciprocating loading on the edge area of the test block by means of the inclined contact edge, simulating the stress state of the concrete edge under actual stress conditions such as bending and shearing. It can accurately detect its flexural strength and elastic modulus, and measure the elastic modulus and microscopic crack propagation characteristics of the local area of the test block edge by using the friction loading mechanism, providing experimental data support for structural analysis, material selection and durability evaluation.

[0023] The device can be rotated 90 degrees as a whole for detection in the horizontal posture, more realistically simulating the working stress state of concrete components such as beam plates, improving the engineering representativeness and application value of the detection results. After the detection is completed, through the cooperation of the rotatable support arm and the storage structure, the test blocks are sorted and temporarily stored in an orderly manner, improving the subsequent management efficiency; the main bearing bracket after flipping can also be used as an auxiliary support for the upper limit structure, improving the stability of the device.

[0024] A single set of device is compatible with axial compression, flexure, lateral pressure and local stress detection, applicable to the mechanical property evaluation of standard and non-standard test blocks, greatly expanding the detection scenarios and usage scope, and significantly improving the comprehensive utilization rate and cost performance of the equipment. Description of the Drawings

[0025] Figure 1 It is a three-dimensional structural schematic diagram of a concrete test block strength detection device proposed by the present invention; Figure 2 It is a structural schematic diagram of the support module of a concrete test block strength detection device proposed by the present invention; Figure 3 It is a structural schematic diagram of the external frame mechanism of a concrete test block strength detection device proposed by the present invention; Figure 4 It is a structural schematic diagram of the concrete test block placement platform of a concrete test block strength detection device proposed by the present invention; Figure 5 It is a combined structural schematic diagram of the sliding outer ring assembly and the loading moving assembly of a concrete test block strength detection device proposed by the present invention; Figure 6 It is a structural schematic diagram of the loading moving assembly of a concrete test block strength detection device proposed by the present invention; Figure 7Schematic diagram of the deformation structure of the loading and moving component of a concrete specimen strength detection device proposed by the present invention; Figure 8 Schematic diagram of the structure of the bottom loading response mechanism of a concrete specimen strength detection device proposed by the present invention; Figure 9 Schematic diagram of the structure of the vertical loading mechanism of a concrete specimen strength detection device proposed by the present invention; Figure 10 Schematic diagram of the overall structure flipping of a concrete specimen strength detection device proposed by the present invention.

[0026] In the figure: 1. External frame mechanism; 11. Side frame; 12. Limit bracket; 13. Concrete specimen placement platform; 131. Base main body; 132. Limit mechanisms on both sides of the base; 133. Limit strip; 134. Inclined triangular limit component; 14. Horizontal connecting member; 2. Support module; 21. Main load-bearing bracket; 211. Bracket main body; 212. Flipable support arm; 213. Hinge shaft; 22. Arrangement forming mechanism; 23. Support platform connecting plate; 24. Specimen-carrying plate; 25. Horizontal connecting rod; 26. Horizontal connecting shaft; 27. Sliding outer ring assembly; 271. Sliding seat; 272. Sliding connecting plate A; 273. Sliding connecting plate B; 28. Loading and moving component; 281. Magnetic adsorption loading column; 282. Central loading rod; 283. Height adjustment member; 29. Bottom loading response mechanism; 291. Reciprocating friction component; 292. Inclined contact edge; 3. Vertical loading mechanism; 31. Vertical slide rail; 32. Vertical slider; 33. Upper and lower loading connecting member; 34. Upper loading platform. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0028] Refer to Figures 1 - 10, Embodiment 1, a concrete test block strength detection device, comprising an external frame mechanism 1, a support module 2 and a vertical loading mechanism 3. The support module 2 is installed in the inner cavity of the external frame mechanism 1, and the vertical loading mechanism 3 is vertically arranged at the middle position of the support module 2. The support module 2 includes a main load-bearing bracket 21 and an arrangement forming mechanism 22 installed on the side end face of the main load-bearing bracket 21. The bottom edge position of the main load-bearing bracket 21 extends to install a support platform connecting plate 23. The test plates 24 are vertically arranged and laid on the upper end face of the support platform connecting plate 23. The other end of the test plate 24 is connected to the main load-bearing bracket 21 through a transverse connecting rod 25. Place the concrete test block to be subjected to strength detection directly above the concrete test block placement platform 13. Since the upper part of the inclined triangular limiting member 134 is triangular, the concrete test block is placed on the inclined side. Through the overall movement of the vertical loading mechanism 3, the loading moving assembly 28 and the bottom loading response mechanism 29 move in the same direction. Place the concrete test block for pressing at the interval between the two upper loading platforms 34. When the self-weight of the concrete test block presses down on the upper loading platform 34 and the upper and lower loading connecting members 33, the vertical slider 32 at the bottom moves downward along the vertical slide rail 31. While the vertical loading mechanism 3 presses downward, it can also push the loading moving assembly 28 to move in the same direction, playing a role of self-positioning and stable support, effectively preventing the test block from sliding or shifting during the detection process. Through the overall movement of the upper structure vertical loading mechanism 3, the lower connecting member loading moving assembly 28 and the bottom loading response mechanism 29 are driven to move in the same direction cooperatively, realizing synchronous loading of multiple components, simplifying the operation process of the operator, and improving the loading efficiency and structural coordination.

[0029] Embodiment 2, the support module 2 further includes a transverse connecting shaft 26 connected to the interval between two groups of laterally oppositely arranged transverse connecting rods 25. The outer circles of the four groups of transverse connecting shafts 26 are slidably connected to a sliding outer ring assembly 27; The sliding outer ring assembly 27 includes four groups of arranged sliding seats 271 and a sliding connecting plate A 272 and a sliding connecting plate B 273 for connecting the four groups of sliding seats 271; A loading and moving component 28 is vertically inserted at the interval between two groups of sliding connecting plates B273. The loading and moving component 28 includes two magnetically attracted magnetic loading columns 281. A central loading rod 282 is inserted in the middle position between the two magnetic loading columns 281. A height adjusting member 283 is slidably sleeved on the outer circumference of the two magnetic loading columns 281. The staff can vertically adjust the height adjusting member 283 sleeved on the outer circumference of the magnetic loading column 281 according to the weight of the concrete test block to be inspected. When the size of the concrete test block for pressing is larger than the test block placed on the test block placement platform 13 of the base, the height adjusting member 283 can be lifted upward, so that the length of the magnetic loading column 281 below it will elongate accordingly, so that the bottom of the central loading rod 282 can closely adhere to the upper surface of the concrete test block to be inspected. Under the action of the gravity of the upper concrete test block, the two magnetic loading columns 281 will exert pressure on both sides along the upper end surface of the test block to be inspected. The bottom end surfaces of the two magnetic loading columns 281 and the reciprocating friction member 291 symmetrically exert pressure on both sides along the upper end surface of the test block, which can effectively ensure that the test block to be inspected is uniformly stressed during the detection process, avoid structural damage or misjudgment caused by eccentric compression, and thus realize the pressing detection of the concrete test block. During the detection process, by applying an axial pressure to the test block, its axial compressive strength is measured. This strength can more accurately reflect the bearing capacity of the concrete in the actual axially compressed member, and has direct reference value for the design and evaluation of the axially compressed member of the concrete structure; allowing the test block to produce a certain amount of bending deformation during compression, or by adjusting the placement method and loading method of the test block, the flexural strength of the concrete can also be indirectly detected. The flexural strength reflects the ability of the concrete to resist bending failure, and is of great significance for evaluating the flexural members and crack resistance performance in the concrete structure; During the test, the test block is in an axially compressed state, which can more truly reflect the stress condition of the structural member in the project, and provides a reliable basis for the design and checking calculation of the concrete structure. By adjusting the loading method or the placement method of the test block, a bending effect can be induced on the test block, so as to indirectly evaluate the flexural strength of the concrete, which is suitable for the analysis of flexural members.

[0030] Embodiment 3: When the size of the concrete test block for pressing is less than or equal to the test block placed on the test block placement platform 13 of the base, the height adjustment member 283 can be moved downward to the bottommost position of the magnetic attraction loading column 281, so that the magnetic attraction loading column 281 and the central loading rod 282 press the concrete test block downward simultaneously for testing. Without the need to prepare special fixtures additionally, test blocks of different specifications can be tested, expanding the application range of the equipment. It can stably apply pressure to small test blocks, ensure uniform distribution of force, thereby obtaining more accurate strength data, and avoid measurement errors or detection difficulties caused by the small size of the test block. During the detection process, the cooperation of the magnetic attraction loading column 281 and the central loading rod 282 can reduce the offset or tilt of the test block under pressure, improving the repeatability and reliability of the detection, which is particularly important for small-sized test blocks because they are more susceptible to uneven force distribution.

[0031] The bottom of the magnetic attraction loading column 281 is connected to the upper end surface of the bottom loading response mechanism 29. The bottom loading response mechanism 29 includes two sets of reciprocating friction members 291 arranged oppositely and inclined contact edges 292 opened at the bottom positions of the two sets of reciprocating friction members 291. The upper end surface of one set of reciprocating friction members 291 is connected to the bottom of one side magnetic attraction loading column 281, and the bottom positions of the two sets of reciprocating friction members 291 are set at a relative inclination angle.

[0032] Embodiment 4: The main bearing bracket 21 includes a bracket main body 211 and a rotatable support arm 212 installed on the upper end surface of the bracket main body 211. The two sets of rotatable support arms 212 arranged oppositely are hinged. The two sets of rotatable support arms 212 are connected in series through a hinge shaft 213. When the concrete test block is completed with detection, the two sets of rotatable support arms 212 arranged on both sides of the device can be flipped around the hinge shaft 213 below them as a rotation fulcrum, so that the main bearing bracket 21 of the originally vertically installed structure rotates to a horizontally parallel placement state; after the flipping is completed, the detected concrete test block can be placed into the arranged forming mechanism 22 of the storage structure for arranged forming, which is convenient for unified classification management. At this time, the structure of the flipped main bearing bracket 21 can also be used to support the end of the inclined triangular limiting member 134 of the upper structure, playing an auxiliary supporting role and enhancing the stability of the entire system and the convenience of subsequent operations.

[0033] The external frame mechanism 1 includes side frames 11 and limiting brackets 12 opened on both sides of the side frames 11. A transverse connecting member 14 is horizontally installed on the inner end surface of the limiting brackets 12. The middle position at the bottom of the inner cavity of the side frames 11 is installed with a concrete test block placement platform 13. The other end of the transverse connecting member 14 is attached to the upper end surface of the concrete test block placement platform 13. The concrete test block placement platform 13 horizontally penetrates through the interval of the test plate 24.

[0034] Example 5. The concrete test block placement platform 13 includes a base body 131 and base side limiting mechanisms 132 installed on both sides of the edge of the side end face of the base body 131. The other ends of the base side limiting mechanisms 132 are installed with limiting strips 133, and an inclined triangular limiting component 134 is installed at the interval between the two groups of limiting strips 133.

[0035] The vertical loading mechanism 3 includes a vertical slide rail 31 vertically installed at the middle position of the side end face of the side frame 11. Two vertical sliders 32 are vertically and slidably connected to the front end face of the vertical slide rail 31. The two vertical sliders 32 are oppositely arranged with an upper and lower loading connecting member 33, and the other end of the upper and lower loading connecting member 33 is provided with an upper loading platform 34. To further accurately detect the flexural strength and elastic modulus of the edge position of the concrete test block, a set of structured loading and friction response detection mechanism is provided in this device. This mechanism includes an external motor installed in the middle of the upper loading platform 34, and its output end is vertically downward, and a periodic impact force is generated in the running process through a reciprocating driving method.

[0036] The external motor impacts and loads the upper loading platform 34, driving the vertical loading mechanism 3 of the upper structure and the overall moving component loading moving component 28 connected below it to apply downward pressure. When the loading moving component 28 moves downward, the structural member reciprocating friction component 291 connected to its bottom starts to act on the edge area of the concrete test block.

[0037] Example 6. The bottom of the reciprocating friction component 291 is provided with an inclined structure inclined contact edge 292, which will generate inclined contact and friction with the edges of both end faces of the concrete test block during the movement, forming a force loading. Under the continuous reciprocating drive of the external motor, the reciprocating friction component 291 slides in a reciprocating impact manner along the two side edges of the test block, so that the edge area of the concrete test block bears repeated loading.

[0038] This loading method simulates the complex stress state suffered by the edge of the test block in the actual component, and can test the edge flexural performance of concrete under local bending, shear or combined action. At the same time, by measuring the deformation amount during the force application process, the edge elastic modulus response of concrete in this local area can be evaluated, providing experimental basic data for high-precision structural analysis.

[0039] Example 7. After the whole device is turned over by 90 degrees, a lateral load can be applied to the concrete test block, which is closer to the force form of beam-type and slab-type concrete components in the working state in the actual structure, and improves the engineering adaptability and representativeness of the test results.

[0040] The device can complete the detection operation in both vertical and horizontal postures, and is compatible with the detection of axial compressive strength and flexural, shear or lateral pressure strength, greatly enhancing the scope of application and detection ability of the equipment. In the horizontal state, the contact surface between the edge of the test block and the two-side structure is more sufficient, which is helpful for implementing refined analysis projects such as edge compression performance test, local stress concentration research and micro-crack propagation monitoring.

[0041] After flipping, the test block can be more stably clamped into the lateral limiting device. Especially for long strip or non-standard shaped test blocks, the risk of lateral deviation or sliding can be significantly reduced, enhancing the repeatability of the test and the accuracy of the results. After flipping the same set of structure, it can be adapted to the force detection in different directions, avoiding the configuration of multiple independent devices for different detection conditions, saving space and cost, and improving the comprehensive utilization rate of the equipment.

[0042] In summary: Place the concrete test block to be subjected to strength detection directly above the concrete test block placement platform 13. Since the upper part of the inclined triangular limiting component 134 is triangular, the concrete test block is placed on the inclined side. Through the overall movement of the vertical loading mechanism 3, the loading moving component 28 and the bottom loading response mechanism 29 move in the same direction. Place the concrete test block for pressing at the interval between the two upper loading platforms 34. When the self-weight of the concrete test block presses down on the upper loading platform 34 and the upper and lower loading connecting parts 33, the vertical slider 32 at the bottom moves downward along the vertical slide rail 31. While the vertical loading mechanism 3 presses downward, it can also push the loading moving component 28 to move in the same direction, playing the role of self-positioning and stable support, effectively preventing the test block from sliding or shifting during the detection process. Through the overall movement of the upper structure vertical loading mechanism 3, the lower connecting component loading moving component 28 and the bottom loading response mechanism 29 are driven to move in the same direction synergistically, realizing synchronous loading of multiple components, simplifying the operation process of the operator, and improving the loading efficiency and structural coordination.

[0043] The staff can vertically adjust the height adjusting part 283 sleeved on the outer circle of the magnetic adsorption loading column 281 according to the self-weight of the concrete test block to be inspected. When the size of the concrete test block for pressing is larger than the test block placed on the base concrete test block placement platform 13, the height adjusting part 283 can be lifted upward, so that the length of the magnetic adsorption loading column 281 below it increases accordingly, so that the bottom of the central loading rod 282 can closely adhere to the upper surface of the concrete test block to be inspected. Under the action of the gravity of the upper concrete test block, the two magnetic adsorption loading columns 281 will apply pressure to both sides along the upper end surface of the test block to be inspected. The bottom end surfaces of the two magnetic adsorption loading columns 281 and the reciprocating friction part 291 apply symmetric pressure to both sides along the upper end surface of the test block, which can effectively ensure that the test block to be inspected is uniformly stressed during the detection process, avoiding structural damage or misjudgment caused by eccentric compression, so as to realize the pressing detection of the concrete test block.

[0044] During the detection process, axial pressure is applied to the test block to measure its axial compressive strength, which can more accurately reflect the bearing capacity of concrete in actual axially compressed members and has direct reference value for the design and evaluation of compressed members of concrete structures; allowing the test block to produce a certain amount of bending deformation during compression, or by adjusting the placement method and loading method of the test block, the flexural strength of concrete can also be indirectly detected. The flexural strength reflects the ability of concrete to resist bending failure and is of great significance for evaluating flexural members and crack resistance performance in concrete structures; During the test, the test block is in an axially compressed state, which can more truly reflect the stress state of structural members in the project and provide a reliable basis for the design and checking calculation of concrete structures. By adjusting the loading method or the placement method of the test block, a bending effect can be induced in the test block, thereby indirectly evaluating the flexural strength of concrete, which is applicable to the analysis of bending members.

[0045] When the size of the concrete test block used for pressing is less than or equal to the test block placed on the test block placement platform 13 of the base, the height adjustment member 283 can be moved downward to the bottommost position of the magnetic adsorption loading column 281, so that the magnetic adsorption loading column 281 and the central loading rod 282 press the concrete test block downward at the same time. Without the need to prepare special fixtures additionally, test blocks of different specifications can be detected, expanding the application range of the equipment, being able to stably apply pressure to small test blocks, ensuring uniform distribution of force, thereby obtaining more accurate strength data, and avoiding measurement errors or detection difficulties caused by the small size of the test block. During the detection process, the cooperation of the magnetic adsorption loading column 281 and the central loading rod 282 can reduce the offset or tilt of the test block during compression, improving the repeatability and reliability of the detection, which is particularly important for small-sized test blocks because they are more susceptible to uneven distribution of force.

[0046] To further achieve accurate detection of the flexural strength and elastic modulus at the edge position of the concrete test block, this device is provided with a set of structured loading and friction response detection mechanism. This mechanism includes an external motor installed in the middle of the upper loading platform 34, whose output end is vertically downward and generates periodic impact force through a reciprocating drive method during operation.

[0047] The external motor applies impact loading to the upper loading platform 34, driving the upper structure vertical loading mechanism 3 and the overall moving assembly loading moving assembly 28 connected below it to press downward. When the loading moving assembly 28 moves downward, the structural member reciprocating friction member 291 connected to its bottom starts to act on the edge area of the concrete test block.

[0048] The bottom of the reciprocating friction member 291 is provided with an inclined structure, the inclined contact edge 292, which will make inclined contact and friction with the edges of both ends of the concrete test block during the movement process, forming a force loading. Under the continuous reciprocating drive of the external motor, the reciprocating friction member 291 performs reciprocating impact sliding along the two side edges of the test block, so that the edge area of the concrete test block bears repeated loading.

[0049] This loading method simulates the complex stress state suffered by the edge of the test block in the actual component, and can test the edge flexural resistance performance of concrete under local bending, shear or combined action. At the same time, by measuring the deformation amount during the force application process, the edge elastic modulus response of concrete in this local area can be evaluated, providing test basic data for high-precision structural analysis.

[0050] When the concrete test block is completed with the detection, two groups of rotatable support arms 212 arranged on both sides of the device can rotate around the hinge shaft 213 below it as the rotation fulcrum, so that the main load-bearing bracket 21 of the originally vertically installed structure rotates to the horizontally parallel placement state; after the rotation is completed, the detected concrete test block can be placed into the arranged forming mechanism 22 of the storage structure arranged in a row, which is convenient for unified classification management. At this time, the structure of the rotated main load-bearing bracket 21 can also be used to support the end of the inclined triangular limit member 134 of the upper structure, playing an auxiliary support role and enhancing the stability of the entire system and the convenience of subsequent operations.

[0051] After the device is rotated 90 degrees as a whole, a lateral load can be applied to the concrete test block, which is closer to the force application form of beam-type and slab-type concrete components in the actual structure during the working state, and improves the engineering adaptability and representativeness of the detection results.

[0052] The device can complete the detection operation in both vertical and horizontal postures, compatible with the axial compressive strength detection and the flexural, shear or lateral pressure strength detection, greatly enhancing the application range and detection ability of the equipment. In the horizontal state, the contact surface between the edge of the test block and the two side structures is more sufficient, which is helpful for implementing refined analysis projects such as edge compression performance testing, local stress concentration research and microcrack propagation monitoring.

[0053] After flipping, the test block can be more stably clamped into the lateral limiting device. Especially for long-strip or non-standard shaped test blocks, the risk of lateral deviation or sliding can be significantly reduced, enhancing the repeatability of the test and the accuracy of the results. The same set of structure can be adapted to the force detection in different directions after flipping, avoiding configuring multiple independent devices for different detection working conditions, saving space and cost, and improving the comprehensive utilization rate of the equipment.

[0054] The above is the entire working principle of the present invention.

[0055] In the present invention, the installation methods, connection methods or setting methods of all the above-mentioned components are common mechanical methods, and the specific structures, models and coefficient indexes of all their components are their own technologies. Any implementation that can achieve their beneficial effects can be carried out, so no further elaboration will be made.

[0056] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

[0057] In the present invention, unless otherwise stated, the directional terms such as "up and down, left and right, front and back, inside and outside, vertical and horizontal" included in the terms only represent the directions of the terms in the normal use state, or are the common names understood by those skilled in the art, and should not be regarded as a limitation to the terms. At the same time, the serial nouns such as "first", "second" and "third" do not represent specific quantities and orders, but are only used for name distinction. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

Claims

1. A concrete specimen strength detection device, comprising an external frame mechanism (1), a support module (2) and a vertical loading mechanism (3), characterized in that, A support module (2) is installed in the inner cavity of the external frame mechanism (1). A vertical loading mechanism (3) is vertically arranged at the middle position of the support module (2). The support module (2) includes a main bearing bracket (21) and an arrangement forming mechanism (22) installed on the side end face of the main bearing bracket (21). A support platform connecting plate (23) is extended and installed at the bottom edge position of the main bearing bracket (21). Test plates (24) are vertically laid in an array on the upper end face of the support platform connecting plate (23). The other end of the test plate (24) is connected to the main bearing bracket (21) through a transverse connecting rod (25). The support module (2) further includes a transverse connecting shaft (26) connected to the interval between two groups of transversely opposite transverse connecting rods (25). A sliding outer ring assembly (27) is slidably connected to the outer circle of the four groups of transverse connecting shafts (26). The sliding outer ring assembly (27) includes four groups of arranged sliding seats (271), a sliding connecting plate A (272) and a sliding connecting plate B (273) for connecting the four groups of sliding seats (271). A loading moving component (28) is vertically inserted into the interval between the two groups of sliding connecting plates B (273). The loading moving component (28) includes two magnetically attracted magnetic loading columns (281). A central loading rod (282) is inserted through the middle position of the two groups of magnetic loading columns (281). A height adjusting component (283) is slidably sleeved on the outer circle of the two groups of magnetic loading columns (281).

2. The strength detection device for concrete test blocks according to claim 1, characterized in that, The main bearing bracket (21) includes a bracket main body (211) and a flip-up support arm (212) installed on the upper end face of the bracket main body (211). The two groups of relatively arranged flip-up support arms (212) are hinged, and the two groups of flip-up support arms (212) are connected in series through a hinge shaft (213).

3. The strength detection device for concrete test blocks according to claim 1, characterized in that, The bottom of the magnetic loading column (281) is connected to the upper end face of a bottom loading response mechanism (29). The bottom loading response mechanism (29) includes two groups of relatively arranged reciprocating friction components (291) and inclined contact edges (292) opened at the bottom positions of the two groups of reciprocating friction components (291).

4. The strength detection device for concrete test blocks according to claim 3, characterized in that, The upper end face of one group of the reciprocating friction components (291) is connected to the bottom of one side of the magnetic loading column (281). The bottom positions of the two groups of reciprocating friction components (291) are set at a relative inclination angle.

5. The strength detection device for concrete test blocks according to claim 1, wherein, The external frame mechanism (1) includes side frames (11) and limit brackets (12) opened on both sides of the side frames (11). A transverse connecting piece (14) is horizontally installed on the inner end face of the limit bracket (12). A concrete test block placing platform (13) is installed at the middle position of the bottom of the inner cavity of the side frame (11). The other end of the transverse connecting piece (14) is attached to the upper end face of the concrete test block placing platform (13). The concrete test block placing platform (13) horizontally penetrates through the interval of the test plates (24).

6. The strength detection device for concrete test blocks according to claim 5, characterized in that, The concrete specimen placement platform (13) includes a base body (131) and base side limiting mechanisms (132) installed on both sides of the edge of the side end face of the base body (131). The other ends of the base side limiting mechanisms (132) are installed with limiting strips (133), and an inclined triangular limiting member (134) is installed at the interval between the two groups of limiting strips (133).

7. An apparatus for testing the strength of concrete test blocks according to claim 5, characterized in that, The vertical loading mechanism (3) includes a vertical slide rail (31) vertically installed at the middle position of the side end face of the side frame (11). Two vertical sliders (32) are vertically and slidably connected to the front end face of the vertical slide rail (31). Two groups of vertical sliders (32) are oppositely arranged with an upper and lower loading connecting member (33), and an upper loading platform (34) is opened at the other end of the upper and lower loading connecting member (33).

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