A compressive strength test device for ultra-light and high-strength mullite corundum lightweight bricks

Abstract

The invention discloses a compressive strength testing device for ultra-light and high-strength mullite corundum lightweight bricks, relates to the technical field of mullite lightweight brick compressive testing, and is mainly aimed at completing accurate zoning of various stages in the process of compressive strength testing of lightweight brick masonry, that is, the phenomenon that the stress detection result of lightweight brick masonry is inaccurate due to insufficient or excessive pressure application; in the invention, on the premise of accurately knowing the stress damaged position of lightweight brick masonry and the various stages of crack generation and crushing, the compressive test is completed through automatic pressurizing action, avoiding the situation that the downtime is too long due to manual adjustment of the pressure size and the crack generation time period and the crushing time point are unclear, thereby facilitating accurate grading of the compressive strength of lightweight brick masonry, and then accurately controlling the various stages of the pressurizing action with the aid of a control system, so that the lightweight brick masonry can obtain accurate zoning of various stages in the process of compressive strength testing.

Description

Technical Field

[0001] The invention relates to the technical field of compression resistance detection of mullite lightweight bricks, and in particular to a compression strength testing device for ultra-light and high-strength mullite corundum lightweight bricks. Background Art

[0002] Pressure testing machines are widely used in various fields of production and life, such as mechanical strength testing of concrete, cement, masonry, wood, metal, etc. As far as lightweight brick masonry is concerned, strength is its most important technical characteristic. Pressure testing machines are used to measure the ultimate compressive strength of lightweight brick masonry and determine the strength grade of lightweight brick masonry to reflect the quality of lightweight bricks. In practice, qualified pressure tests often measure the compressive strength test of masonry formed by the same batch of lightweight bricks, but the results are very different.

[0003] In conjunction with the above content, it should be noted that when the pressure test machine has an eccentric load in actual work, that is, when the lightweight bricks are subjected to uneven stress, the measurement results will be inaccurate, which will directly affect the validity and reliability of the measurement results; in addition, the pressure test machine in the prior art has problems including: it does not have the ability to accurately partition each stage during the compressive strength test of lightweight brick masonry, and there is an inaccurate stress detection result of the lightweight brick masonry due to insufficient or excessive pressure. It only relies on manual adjustment of the pressure size, which also brings about problems such as long downtime and inaccurate adjustment that affect the test results;

[0004] To this end, this application proposes a solution. Summary of the invention

[0005] The purpose of the present invention is to provide a compressive strength testing device for ultra-light and high-strength mullite corundum lightweight bricks. The compressive test is completed through an automatic pressurizing action, avoiding the situation where the downtime is too long and the cracking time period and the crushing time point are unclear due to manual adjustment of the pressure, thereby facilitating the accurate grading of the compressive strength of lightweight brick masonry; and then assisted by a control system to accurately control each stage of the pressurizing action, the lightweight brick masonry is accurately divided into each stage during the compressive strength test, and a digitized image is used to display the cracks and subsequent crushing and fracture of the lightweight brick masonry, thereby reducing the error of the tester in manually recording the cracks to obtain the compressive strength result, and the compressive strength result can be read intuitively, which is conducive to the test to solve the technical defects proposed by the background technology.

[0006] The purpose of the present invention can be achieved by the following technical solutions: A compressive strength test device for ultra-light high-strength mullite corundum lightweight bricks, comprising a bottom base plate, on which a base, a main frame, a lower pressing plate and an upper pressing plate are arranged at intervals, and a hydraulic assembly for driving the lower pressing plate to move vertically is commonly arranged in the bottom base plate and the base;

[0007] The upper top of the upper pressing plate and the lower bottom of the lower pressing plate are both provided with pressure plates, and six pressure sensors distributed circumferentially are embedded on each of the pressure plates. Screws are commonly inserted between the four corners of the bottom plate and the upper pressing plate, and measuring plates embedded with photoelectric sensors for identifying surface cracks of lightweight brickwork are respectively installed on the front and rear sides of the upper pressing plate and the lower pressing plate;

[0008] A frame is arranged on one side of the bottom substrate, and a driving assembly for starting the hydraulic assembly is installed on the frame, wherein the driving assembly includes a motor and a piston column.

[0009] The hydraulic assembly is further configured as follows: the hydraulic assembly includes an oil inlet pipeline and an oil return pipeline, an oil filling chamber connected to the oil inlet pipeline is arranged at the bottom of the bottom plate and the base, an oil storage chamber connected to the oil return pipeline is arranged between the base and the main frame, and a valve ball 1 is arranged at one end of the oil inlet pipeline close to the oil filling chamber, a valve ball 2 is embedded in the outer end of the oil return pipeline, an oil unloading pipeline connected to the oil filling chamber is arranged at one end of the bottom plate away from the oil inlet pipeline, a connecting pipeline connected to the oil unloading pipeline is arranged at the bottom of the oil storage chamber, and a valve ball 3 is embedded in one end of the oil unloading pipeline close to the oil filling chamber.

[0010] It is further configured as follows: the outer end ports of the oil inlet pipeline and the oil return pipeline corresponding to the bottom substrate are commonly connected to oil pipe 2, the outer end of the oil pipe 2 is connected to a connector connected to the drive component, and the top of the pipeline opening of the bottom substrate close to valve ball 1 and valve ball 2 is provided with a blocking rod.

[0011] It is further configured as follows: the driving assembly also includes a crank plate and a cylinder, the piston column is vertically movable and arranged in the cylinder, the crank plate is rotatably installed in the middle of the inner top side of the frame and is rotatably connected to the piston column, the motor drives the crank plate to rotate and drives the piston column to move vertically in the cylinder, and the cylinder is arranged at the bottom of the frame and is installed with an oil pipe connected to the connecting head.

[0012] It is further configured as follows: a valve stem is rotatably mounted on the outer end of the bottom substrate corresponding to the oil unloading pipeline, the inner end of the valve stem is connected to a spring connected to the valve ball in three phases, and the valve stem is rotatably arranged on the inner end of the oil unloading pipeline and does not overlap with the connecting pipeline.

[0013] It is further configured that: a locking bolt is installed on the outside of each screw rod corresponding to the bottom of the bottom base plate or the top of the upper pressing plate, and scale lines are staggeredly arranged on the outer side of the upper surface of the lower pressing plate.

[0014] It is further configured that: the pressure sensor and the photoelectric sensor are externally connected to a control system, and the control system includes a processor, a data acquisition module, a data fusion analysis module and a feedback execution module;

[0015] The data acquisition module is used to collect the crack curve value LF of the measuring plate within the time threshold and obtain the pressure load value PZ of the pressure sensor within the time threshold, and send the crack curve value LF and the pressure load value PZ to the data fusion analysis module through the processor; after obtaining the crack curve value LF and the pressure load value PZ, the data fusion analysis module obtains the pressure coefficient CY through numerical calculation, and compares and analyzes the pressure coefficient CY with the preset pressure threshold Yy and sends it to the feedback execution module;

[0016] Specifically, S1: The position of the crack bending point of the lightweight brick masonry is obtained by a photoelectric sensor located on the inner side of the measuring plate, and a crack curve diagram is obtained by connecting the time as the horizontal coordinate axis and the crack bending point position as the vertical coordinate axis by a smooth curve. The longitudinal height corresponding to a certain time point is substituted into the crack curve diagram as the crack curve value LF; the pressure values ​​of the pressure sensors at various positions on the pressure plate are obtained, and the current pressure load value PZ is obtained by the time at which the crack bending point is located;

[0017] S2: Construct the pressure coefficient CY calculation formula CY=(PZ t2 -PZ t1 )(LF n -LF n-1 ) / 6, where t1 is the previous crack curve value LF n-1 time point, t2 is the time point at which the next crack curve value LF is obtained n time point;

[0018] S3: The data fusion analysis module receives the pressure coefficient CY and the pressure threshold Yy for comparative analysis. If the pressure coefficient CY> the pressure threshold Yy, a high-intensity signal is generated and sent to the feedback execution module; if the pressure coefficient is within the pressure threshold Yy range, a normal signal is generated and sent to the feedback execution module; if the pressure coefficient is less than the pressure threshold Yy, a low-intensity signal is generated and sent to the feedback execution module;

[0019] The feedback execution module performs the following actions according to the signals generated by the data fusion analysis module:

[0020] Action 1: When a high-intensity signal is received, the time when the crack point appears and the distance between the pressure plates are recorded, and the operation of the piston column is stopped;

[0021] Action 2: When receiving a normal signal, record the time interval Δt between the crack point and the fracture of the lightweight brickwork and the spacing distance of the pressure plate, and stop the operation of the piston column when the lightweight brickwork fractures;

[0022] Action 3: When a low-intensity signal is received, the fracture time of the lightweight brickwork is recorded and the operation of the piston rod is stopped.

[0023] The present invention has the following beneficial effects:

[0024] 1. The present invention is to complete the precise division of each stage during the compressive strength test of lightweight brick masonry, that is, there is a phenomenon that the stress detection result of lightweight brick masonry is inaccurate due to insufficient or excessive pressure. The compressive test is completed through automatic pressurization action, avoiding the situation that the downtime is too long due to manual adjustment of the pressure size and the crack generation time period and the crushing time point are unclear, so as to accurately classify the compressive strength of lightweight brick masonry;

[0025] 2. During the automatic pressurization process, the stress damage position of the lightweight brick masonry and the various stages of crack generation and crushing are accurately known in advance, and the control system is used to accurately control the various stages of the pressurization action, so that the lightweight brick masonry can be accurately divided into various stages during the compressive strength test, and digital images are used to display the cracks and subsequent crushing and fracture of the lightweight brick masonry, reducing the error of the tester's manual recording of cracks to obtain the compressive strength results, and the compressive strength results can be read intuitively, which is conducive to the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of a compressive strength testing device for ultra-light and high-strength mullite corundum lightweight bricks proposed by the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of a compressive strength test device for ultra-light and high-strength mullite corundum lightweight bricks proposed by the present invention;

[0029] Figure 3 This is a structural cross-sectional view of a driving component of a compressive strength testing device for ultra-light and high-strength mullite corundum lightweight bricks proposed by the present invention;

[0030] Figure 4 A cross-sectional view of a hydraulic component of a compressive strength testing device for ultra-light and high-strength mullite corundum lightweight bricks proposed by the present invention;

[0031] Figure 5 The present invention proposes a compressive strength testing device for ultra-light and high-strength mullite corundum lightweight bricks. Figure 4 A in the enlarged view;

[0032] Figure 6The present invention proposes a compressive strength testing device for ultra-light and high-strength mullite corundum lightweight bricks. Figure 4 The enlarged view of point B in the figure;

[0033] Figure 7 This is a structural disassembly diagram of a hydraulic component of a compressive strength test device for ultra-light and high-strength mullite corundum lightweight bricks proposed by the present invention;

[0034] Figure 8 The present invention provides a disassembled bottom view of a hydraulic assembly of a compressive strength testing device for ultra-light and high-strength mullite corundum lightweight bricks.

[0035] In the figure: 1. bottom plate; 2. upper pressure plate; 3. frame; 4. base; 5. main frame; 6. lower pressure plate; 7. measuring plate; 8. screw; 9. motor; 10. crank plate; 11. piston column; 12. cylinder; 13. oil pipe 1; 14. connector; 15. oil pipe 2; 16. oil inlet pipeline; 17. oil return pipeline; 18. valve ball 1; 19. valve ball 2; 20. stop rod; 21. connecting pipeline; 22. oil unloading pipeline; 23. valve stem; 24. spring; 25. valve ball 3; 26. oil filling chamber; 27. oil storage chamber; 28. pressure plate; 29. ​​pressure sensor; 30. scale line; 31. locking bolt. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Embodiment 1: In view of the fact that the prior art does not have the ability to accurately partition each stage during the compressive strength test of lightweight brick masonry, that is, there is an inaccurate stress test result of lightweight brick masonry caused by insufficient or excessive pressure, refer to Figure 1-4 and Figure 7 - Figure 8 As shown, in this embodiment, a compressive strength test device for ultra-light high-strength mullite corundum lightweight bricks includes a bottom base plate 1, on which a base 4, a main frame 5, a lower pressing plate 6 and an upper pressing plate 2 are arranged at intervals, and a hydraulic component for driving the lower pressing plate 6 to move vertically is commonly arranged in the bottom base plate 1 and the base 4;

[0038] The upper top of the upper pressing plate 2 and the lower bottom of the lower pressing plate 6 are both provided with a pressure plate 28, and each pressure plate 28 is embedded with six circumferentially distributed pressure sensors 29, and screws 8 are commonly inserted between the four corners of the bottom base plate 1 and the upper pressing plate 2, and the front and rear sides of the upper pressing plate 2 and the lower pressing plate 6 are respectively installed with measuring plates 7 for identifying cracks on the surface of lightweight brickwork and embedded with photoelectric sensors; a frame 3 is provided on one side of the bottom base plate 1, and a driving component for starting the hydraulic component is installed on the frame 3, and the driving component includes a motor 9 and a piston rod 11;

[0039] The hydraulic assembly includes an oil inlet pipeline 16 and an oil return pipeline 17. An oil filling chamber 26 connected to the oil inlet pipeline 16 is provided at the bottom of the bottom base plate 1 and the base 4. An oil storage chamber 27 connected to the oil return pipeline 17 is provided between the base 4 and the main frame 5. A valve ball 18 is provided at one end of the oil inlet pipeline 16 close to the oil filling chamber 26. A valve ball 29 is embedded at the outer end of the oil return pipeline 17. An oil unloading pipeline 22 connected to the oil filling chamber 26 is provided at one end of the bottom base plate 1 away from the oil inlet pipeline 16. A connecting pipeline 21 connected to the oil unloading pipeline 22 is provided at the bottom of the oil storage chamber 27. A valve ball 3 25 is embedded at one end of the oil unloading pipeline 22 close to the oil filling chamber 26.

[0040] The outer end ports of the oil inlet pipeline 16 and the oil return pipeline 17 of the bottom substrate 1 are commonly connected with the oil pipe 2 15, and the outer end of the oil pipe 2 15 is connected with the connector 14 which is connected with the driving assembly. The top of the pipeline opening of the bottom substrate 1 near the valve ball 1 18 and the valve ball 2 19 is provided with a blocking rod 20. The outer end of the bottom substrate 1 corresponding to the oil unloading pipeline 22 is rotatably installed with a valve stem 23, and the inner end of the valve stem 23 is connected with a spring 24 which is connected with the valve ball 3 25. The valve stem 23 is rotatably arranged at the inner end of the oil unloading pipeline 22 and does not overlap with the connecting pipeline 21.

[0041] The driving assembly also includes a crank plate 10 and a cylinder 12. The piston column 11 is vertically movable and arranged in the cylinder 12. The crank plate 10 is rotatably installed in the middle of the inner top side of the frame 3 and is rotatably connected with the piston column 11. The motor 9 drives the crank plate 10 to rotate and drives the piston column 11 to move vertically in the cylinder 12. The cylinder 12 is arranged at the bottom of the frame 3 and is installed with an oil pipe 13 connected to the connector 14.

[0042] Each screw rod 8 is provided with a locking bolt 31 at the bottom of the bottom substrate 1 or the top of the upper pressing plate 2, and scale lines 30 are staggeredly arranged on the outer side of the upper surface of the lower pressing plate 6;

[0043] Basic principle: Figure 1 and Figure 4 - Figure 6To illustrate, the gap between the upper pressing plate 2 and the lower pressing plate 6 is used as the insertion space of the lightweight brickwork, and the upper pressing plate 2 and the lower pressing plate 6 are placed in a horizontal state and in the center using auxiliary tools and scale lines 30, and then the measuring plate 7 is installed to the front and rear sides of the lightweight brickwork, and the motor 9 is started. The motor 9 drives the piston column 11 to move vertically in the cylinder 12 through the crank plate 10, and the piston column 11 has two cyclic operation processes;

[0044] Process 1: The piston rod 11 moves downward, so that the hydraulic oil in the oil pipe 13 and the oil pipe 2 14 enters the oil inlet pipe 16. At this time, under the action of the hydraulic pressure, the valve ball 18 is in an open state and the valve ball 2 19 is in a closed state, that is, the hydraulic oil can enter the oil filling chamber 26 and form a push on the lower pressing plate 6, and the lightweight brickwork between the upper pressing plate 2 and the lower pressing plate 6 is squeezed;

[0045] Process 2: The piston rod 11 is lifted upward, at which time the valve ball 18 is closed and the valve ball 2 19 is in an open state, and the hydraulic oil in the self-storage oil chamber 27 enters the oil pipe 1 13 and the oil pipe 2 14 and the cylinder 12 through the oil return line 17, and the hydraulic oil in the oil filling chamber 26 remains unchanged and keeps squeezing the lightweight brickwork;

[0046] Finally, the piston rod 11 continues to press down and lift cyclically until the lightweight brickwork is cracked and broken;

[0047] At the same time, the pressure sensors 29 at various positions obtain the pressures on various positions of the lightweight brickwork, and the photoelectric sensors obtain the positions and times of cracks on the surface of the lightweight brickwork. After comprehensive processing, the lightweight brickwork can be subjected to a relatively accurate compressive strength test, and the stress damaged positions of the lightweight brickwork and the various stages of cracking and crushing can be accurately known. The compressive test is completed through an automatic pressurizing action, avoiding the situation where the downtime caused by manual adjustment of the pressure is too long and the cracking time period and the crushing time point are unclear, thereby facilitating the accurate classification of the compressive strength of the lightweight brickwork.

[0048] It is also necessary to explain that: Figure 4 - Figure 6 As shown, when the test is finished, the motor 9 is in a stopped state, and the oil unloading action is as follows: the valve stem 23 is twisted, and the valve stem 23 moves outward horizontally through the spring 24 to drive the valve ball 3 25 to separate from the closed position of the oil unloading pipeline 22. At this time, the hydraulic oil in the oil filling chamber 26 passes through the oil unloading pipeline 22. The connecting pipeline enters the oil storage chamber 27, so that the lower pressure plate 6 is lowered and separated from the light brickwork to be tested under the lifting effect of the hydraulic oil, and the entire test device is disassembled in reverse order according to the above operations.

[0049] Embodiment 2: This embodiment further optimizes the compressive strength test in Embodiment 1:

[0050] Reference Figure 1 - Figure 8 , including a pressure sensor 29 and a photoelectric sensor externally connected to a control system, the control system includes a processor, a data acquisition module, a data fusion analysis module and a feedback execution module connected to each other;

[0051] The data acquisition module is used to collect the crack curve value LF of the measuring plate 7 within the time threshold and obtain the pressure load value PZ of the pressure sensor 29 within the time threshold, and send the crack curve value LF and the pressure load value PZ to the data fusion analysis module through the processor; after obtaining the crack curve value LF and the pressure load value PZ, the data fusion analysis module obtains the pressure coefficient CY through numerical calculation, and compares and analyzes the pressure coefficient CY with the preset pressure threshold Yy and sends it to the feedback execution module;

[0052] Specifically, S1: The position of the crack bending point of the lightweight brick masonry is obtained by the photoelectric sensor located on the inner side of the measuring plate 7, and a smooth curve is connected with time as the horizontal coordinate axis and the position of the crack bending point as the vertical coordinate axis to obtain a crack curve diagram, and a longitudinal height corresponding to a certain time point is substituted into the crack curve diagram as the crack curve value LF; the pressure value of the pressure sensor 29 at each position on the pressure plate 28 is obtained, and the current pressure load value PZ is obtained by the time at which the crack bending point is located;

[0053] After the crack curve graph is obtained, the image is sent to a display connected to the communication device through a processor for real-time display;

[0054] S2: Construct the pressure coefficient CY calculation formula CY=(PZ t2 -PZ t1 )(LF n -LF n-1 ) / 6, where t1 is the previous crack curve value LF n-1 time point, t2 is the time point at which the next crack curve value LF is obtained n time point;

[0055] S3: The data fusion analysis module receives the pressure coefficient CY and the pressure threshold Yy for comparative analysis. If the pressure coefficient CY> the pressure threshold Yy, a high-intensity signal is generated and sent to the feedback execution module; if the pressure coefficient is within the pressure threshold Yy range, a normal signal is generated and sent to the feedback execution module; if the pressure coefficient is less than the pressure threshold Yy, a low-intensity signal is generated and sent to the feedback execution module;

[0056] The feedback execution module performs the following actions according to the signals generated by the data fusion analysis module:

[0057] Action 1: When a high-intensity signal is received, the time when the crack point appears and the spacing distance of the pressure plate 28 are recorded, and the operation of the piston column 11 is stopped;

[0058] Action 2: when receiving a normal signal, the time interval Δt between the crack point and the fracture of the lightweight brickwork and the spacing distance of the pressure plate 28 are recorded, and the operation of the piston column 11 is stopped when the lightweight brickwork fractures;

[0059] Action 3: When a low-intensity signal is received, the fracture time of the lightweight brickwork is recorded and the operation of the piston rod 11 is stopped.

[0060] In combination with the first embodiment and the second embodiment, for action one: during the lifting and pressing process of the piston rod 11, if a high-strength signal is received, it means that the current lightweight brickwork is divided into a high compressive strength partition range. At this time, it is only necessary to record the crack point time and the spacing distance of the pressure plate 28 to complete the test, and process the lightweight brickwork into a high compressive strength masonry, stop the operation of the piston rod 11, end the test and judge that the current lightweight brickwork is a high-quality product;

[0061] For action 2: when a normal signal is received, it indicates that the current lightweight brickwork is within the medium strength range. When the lightweight brickwork breaks, the crack point and the time interval between the breaks and the spacing between the pressure plates 28 are normally recorded, and the lightweight brickwork is divided into the normal compressive strength partition range. At the same time, the operation of the piston column 11 is stopped, the test is ended, and the current lightweight brickwork is judged to be a qualified product.

[0062] For action three: when a low-intensity signal is received, it means that the current lightweight brick masonry is broken and shattered, and there is no need to record the time and spacing. The test is ended and the current lightweight brick masonry is judged to be an unqualified product.

[0063] In summary: on the premise of accurately knowing the stress damaged position of the lightweight brick masonry and the various stages of crack generation and crushing, the compressive test is completed through automatic pressurization action, avoiding the long downtime caused by manual adjustment of the pressure and the unclear time period of crack generation and crushing time point, which is conducive to accurately grading the compressive strength of the lightweight brick masonry; assisted by the control system to accurately control the various stages of the pressurization action, the lightweight brick masonry can be accurately divided into various stages during the compressive strength test, and the cracks and subsequent crushing and fracture of the lightweight brick masonry can be displayed in digital images, reducing the error of the test personnel in manually recording the cracks to obtain the compressive strength results, and can also intuitively read the compressive strength results, which is conducive to the test.

[0064] The above formulas are obtained by collecting a large amount of data for software simulation and selecting a formula that is close to the actual value. The coefficients in the formula are set by technical personnel in this field according to actual conditions. The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited to this. Any technical personnel familiar with the technical field within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, make equivalent replacement or change, which should be covered within the protection scope of the present invention.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods.

Claims

1. A compressive strength testing device for ultra-light and high-strength mullite corundum lightweight bricks, comprising a base plate (1), characterized in that: The bottom base plate (1) is provided with a base (4), a main frame (5), a lower pressing plate (6) and an upper pressing plate (2) at intervals, and the bottom base plate (1) and the base (4) are provided with a hydraulic assembly for driving the lower pressing plate (6) to move vertically; The upper top of the upper pressing plate (2) and the lower bottom of the lower pressing plate (6) are both provided with a pressure plate (28), and each of the pressure plates (28) is embedded with six circumferentially distributed pressure sensors (29), screws (8) are commonly inserted between the four corners of the bottom plate (1) and the upper pressing plate (2), and measuring plates (7) embedded with photoelectric sensors for identifying cracks on the surface of lightweight brickwork are respectively installed on the front and rear sides of the upper pressing plate (2) and the lower pressing plate (6); A frame (3) is provided on one side of the bottom substrate (1), and a drive assembly for starting a hydraulic assembly is mounted on the frame (3), wherein the drive assembly comprises a motor (9) and a piston rod (11); The pressure sensor (29) and the photoelectric sensor are externally connected to a control system, wherein the control system comprises a processor, a data acquisition module, a data fusion analysis module and a feedback execution module; The data acquisition module is used to acquire the crack curve value LF of the measuring plate (7) within the time threshold and to obtain the pressure load value PZ of the pressure sensor (29) within the time threshold, to obtain the position of the crack bending point of the lightweight brick masonry by a photoelectric sensor located on the inner side of the measuring plate (7), and to draw a smooth curve connection with time as the horizontal coordinate axis and the position of the crack bending point as the vertical coordinate axis to obtain a crack curve graph, to substitute a certain time point into the vertical height corresponding to the crack curve graph to obtain the crack curve value LF, to obtain the pressure value of the pressure sensor (29) at each position on the pressure plate (28), and to obtain the current pressure load value PZ by the time at which the crack bending point is located, and to send the crack curve value LF and the pressure load value PZ to the data fusion analysis module via the processor; After obtaining the crack curve value LF and the pressure load value PZ, the data fusion analysis module constructs the pressure coefficient CY calculation formula ,in, To obtain the previous crack curve value time point, To obtain the next crack curve value time point, and compare and analyze the pressure coefficient CY with the preset pressure threshold Yy and generate a control signal to send to the feedback execution module; the feedback execution module controls the relevant components to perform actions according to the control signal generated by the data fusion analysis module.

2. The compressive strength testing device for ultra-light and high-strength mullite corundum lightweight bricks according to claim 1 is characterized in that: The hydraulic assembly comprises an oil inlet pipeline (16) and an oil return pipeline (17); an oil filling chamber (26) communicating with the oil inlet pipeline (16) is arranged at the bottom of the bottom plate (1) and the base (4); an oil storage chamber (27) communicating with the oil return pipeline (17) is arranged between the base (4) and the main frame (5); a valve ball 1 (18) is arranged at one end of the oil inlet pipeline (16) close to the oil filling chamber (26); a valve ball 2 (19) is embedded at the outer end of the oil return pipeline (17); an oil discharge pipeline (22) communicating with the oil filling chamber (26) is arranged at one end of the bottom plate (1) away from the oil inlet pipeline (16); a connecting pipeline (21) connected to the oil discharge pipeline (22) is arranged at the bottom of the oil storage chamber (27); and a valve ball 3 (25) is embedded at one end of the oil discharge pipeline (22) close to the oil filling chamber (26).

3. The compressive strength testing device for ultra-light and high-strength mullite corundum lightweight bricks according to claim 2 is characterized in that: The outer end ports of the bottom substrate (1) corresponding to the oil inlet pipeline (16) and the oil return pipeline (17) are commonly connected to the second oil pipeline (15); the outer end of the second oil pipeline (15) is connected to a connector (14) in communication with the drive assembly; and the tops of the pipeline openings of the bottom substrate (1) close to the first valve ball (18) and the second valve ball (19) are both provided with blocking rods (20).

4. The compressive strength testing device for ultra-light and high-strength mullite corundum lightweight bricks according to claim 3 is characterized in that: The driving assembly further comprises a crank plate (10) and a cylinder (12); the piston column (11) is arranged to move vertically in the cylinder (12); the crank plate (10) is rotatably mounted on the middle portion of the inner top side of the frame (3) and is rotatably connected to the piston column (11); the motor (9) drives the crank plate (10) to rotate and drives the piston column (11) to move vertically in the cylinder (12); the cylinder (12) is arranged at the bottom of the frame (3) and is provided with an oil pipe (13) connected to a connector (14).

5. The compressive strength testing device for ultra-light and high-strength mullite corundum lightweight bricks according to claim 2 is characterized in that: A valve stem (23) is rotatably mounted on the bottom substrate (1) corresponding to the outer end of the oil unloading pipeline (22); the inner end of the valve stem (23) is connected to a spring (24) connected to a valve ball (25); the inner end of the valve stem (23) is rotatably arranged on the oil unloading pipeline (22) so as not to overlap with the connecting pipeline (21).

6. The compressive strength testing device for ultra-light and high-strength mullite corundum lightweight bricks according to claim 1 is characterized in that: Each screw rod (8) is provided with a locking bolt (31) on the outside of the corresponding bottom of the base plate (1) or the top of the upper pressing plate (2), and scale lines (30) are arranged alternately on the outside of the upper surface of the lower pressing plate (6).

Images