A system for detecting the flexural and compressive strength of cement mortar

Abstract

This utility model belongs to the field of cement mortar testing, and particularly relates to a cement mortar flexural and compressive strength testing system. It includes a workbench, a testing system for testing test blocks mounted on the workbench, a storage box for storing test blocks around the workbench, and a feeding mechanism for transferring test blocks from the storage box to the workbench, enabling automatic feeding of the testing device. A recycling box is located on the side wall of the workbench for collecting the tested test blocks; waste from the test can be directly and automatically placed into the recycling box. This utility model, through the feeding mechanism, enables the transfer of test blocks from the storage box to the testing system. Simultaneously, the feeding mechanism can also transfer test blocks between the flexural strength testing device and the compressive strength testing device. A second brush and cleaning components on the robotic arm can clean the waste residue on the testing system, reducing manual intervention and effectively improving work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of cement mortar testing, and in particular relates to a cement mortar flexural and compressive strength testing system. Background Technology

[0002] Cement mortar is a cement mortar made by mixing cement, standard sand, and water in a fixed ratio. It is mainly used to test the physical and mechanical properties of cement, such as compressive strength and flexural strength. When testing the flexural and compressive strength of cement mortar test blocks, the test blocks need to be manually removed from the test block rack and placed on the flexural strength testing platform. The equipment will then press the test block into two halves. Afterwards, the test blocks will be manually removed and placed separately on the compressive strength testing platform for the compressive strength test. After the test, the cement debris on the testing platform will be cleaned manually to avoid affecting the subsequent test results.

[0003] The flexural and compressive strength tests of cement mortar are numerous and demanding, requiring repeated manual handling and placement of test blocks, as well as manual cleaning of cement debris from the test bench. This not only increases the labor intensity of the staff but also affects the testing efficiency of cement mortar. Furthermore, the positional accuracy of manually placed test blocks is difficult to control, leading to inaccurate stress distribution during testing and affecting the test results. Utility Model Content

[0004] The purpose of this invention is to provide a system for testing the flexural and compressive strength of cement mortar, so as to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the specific technical solution of the cement mortar flexural and compressive strength testing system of this utility model is as follows: A cement mortar flexural and compressive strength testing system includes a workbench, a testing system for testing test blocks mounted on the workbench, a storage box for storing test blocks around the perimeter of the workbench, and a feeding mechanism for transferring test blocks from the storage box to the workbench for automatic feeding of the testing device. A recycling box for collecting the tested test blocks is located on the side wall of the workbench; waste from the test can be directly and automatically fed into the recycling box. The testing system includes a flexural strength testing device located in the center of the top surface of the workbench and compressive strength testing devices located on either side of the flexural strength testing device. A cleaning component for cleaning waste residue from the flexural strength testing device is located on the flexural strength testing device. The feeding mechanism includes a robotic arm located on one side of the workbench, a mounting frame located at the free end of the robotic arm, a clamping mechanism for picking up and placing test blocks on the mounting frame, and a second brush on the mounting frame opposite the clamping mechanism for cleaning waste residue from the compressive strength testing device.

[0006] Furthermore, the flexural strength testing device includes a first support frame mounted on the top surface of the workbench, a lifting device mounted on the first support frame, and an upper pressure head that can move within the first support frame at the bottom end of the lifting device. The bottom surface inside the first support frame is provided with a receiving part for placing test blocks.

[0007] Furthermore, the first support frame includes a base plate on the top surface of the workbench, first columns on both sides of the base plate, and a first top plate on the top surface of the two first columns. The lifting device includes a motor on the top surface of the first top plate, a ball screw at the output end of the motor, a screw nut on the bottom surface of the first top plate and cooperating with the ball screw, a sleeve on the bottom surface of the screw nut that fits around the ball screw, and a first guide frame outside the sleeve, which cooperates with the two first columns. A downward pressure head is located on the bottom surface of the sleeve. The first guide frame includes a first mounting plate on the sleeve and first guide blocks at both ends of the first mounting plate that slide with the first columns. Limiting members that cooperate with the seat plate are provided at both ends of the bottom surface of the first mounting plate.

[0008] Furthermore, the receiving part includes a lower slide rail plate on the base plate, an upper slide rail plate slidably mounted on the lower slide rail plate via a connecting seat, and an electric push rod connected to the connecting seat on the lower slide rail plate. A seat plate is provided on the top surface of the upper slide rail plate, and two cylinders supporting the test block are provided on the seat plate.

[0009] Furthermore, the cleaning assembly includes an electric push rod two mounted on the seat plate, and the telescopic end of the electric push rod two is provided with a first brush for cleaning residue from the seat plate.

[0010] Furthermore, the compressive strength testing device includes a second support frame located on the top surface of the workbench, with a hydraulic cylinder mounted on the second support frame. An upper pressure plate is located at the telescopic end of the hydraulic cylinder. A lower pressure plate is located on the workbench within the second support frame, and a second guide frame, cooperating with the second support frame, is located on the telescopic rod of the hydraulic cylinder. A guide frame, triangular in shape, is located on the top surface of the workbench within the second support frame, with baffles on both sides of the guide frame that are higher than the guide frame. The lower pressure plate penetrates through the guide frame.

[0011] Furthermore, the second support frame includes two sets of second columns mounted on the top surface of the workbench, each set consisting of two columns connected by a second top plate. A hydraulic cylinder is mounted on the second top plate, and a guide frame is located between the two sets of second columns. The second guide frame includes a second mounting plate mounted on the telescopic rod of the hydraulic cylinder, and the side wall of the second mounting plate has second guide blocks that slide in cooperation with each second column.

[0012] Furthermore, the top surface of the placement box is distributed with multiple sets of limiting posts, and each set of limiting posts includes at least three limiting posts. Multiple sets of humidification holes are opened on the top surface of the placement box, and each set of humidification holes surrounds the test block placed on the placement box. A humidifier connected to each set of humidification holes is provided inside the placement box.

[0013] Furthermore, the recycling bin is equipped with a waste cart that can be pulled out and collected from within, and a guide channel on the recycling bin guides the waste that slides down the guide frame. An alignment fixture is located within the guide channel for aligning test blocks after flexural strength testing. The alignment fixture includes a U-shaped mounting bracket located within the guide channel, with guide grooves on its two vertical plates. An L-shaped alignment frame is rotatably mounted within the mounting bracket via a pivot, and multiple isolation rods are arranged along its contour inside the alignment frame. Fastening bolts are threaded onto the alignment frame to define the position of the mounting bracket and the alignment frame, and the bolt threads can pass through the guide grooves.

[0014] Furthermore, the clamping mechanism includes a bidirectional centering clamping cylinder mounted on the mounting frame and two grippers mounted on the bidirectional centering clamping cylinder.

[0015] The cement mortar flexural and compressive strength testing system of this utility model has the following advantages: 1. This utility model, by setting up a feeding mechanism, enables the transport of test blocks from the placement box to the testing system. Simultaneously, the feeding mechanism can also transport test blocks between the flexural strength testing device and the compressive strength testing device, achieving automated material handling and saving labor intensity. Furthermore, the second brush and cleaning components on the robotic arm can respectively clean the waste residue on the compressive strength testing device and the flexural strength testing device, reducing manual intervention and effectively improving work efficiency.

[0016] 2. By setting up two sets of compressive strength testing devices, this utility model can further shorten the test time of the test block and improve work efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a cement mortar flexural and compressive strength testing system according to the present invention; Figure 2 This is a schematic diagram of the detection system structure of this utility model; Figure 3 This is a schematic diagram of the cleaning component, lower slide rail plate, upper slide rail plate, and seat plate of this utility model; Figure 4 This is a top view of the placement box of this utility model; Figure 5 This is a schematic diagram of the mounting bracket, clamping mechanism, and second brush of this utility model; Figure 6This is a schematic diagram of the alignment tooling for this utility model.

[0018] Explanation of markings in the diagram: 1. Workbench; 2. Test block; 3. First support frame; 301. Base plate; 302. First column; 303. First top plate; 4. Lower slide rail plate; 5. Electric push rod one; 6. Connecting seat; 7. Upper slide rail plate; 8. Seat plate; 9. Electric push rod two; 10. First brush; 11. Motor; 12. Ball screw; 13. Screw nut; 131. Sleeve; 14. First guide frame; 141. First mounting plate; 142. First guide block; 15. Upper pressure head; 16. Limiting component; 17. Second support frame; 171. Second column ; 172. Second top plate; 18. Lower pressure plate; 181. Guide frame; 19. Hydraulic cylinder; 20. Second guide frame; 201. Second mounting plate; 202. Second guide block; 21. Upper pressure plate; 22. Alignment fixture; 221. Alignment frame; 222. Isolation rod; 223. Guide groove; 224. Mounting frame; 23. Placement box; 24. Limiting post; 25. Humidification hole; 26. Robotic arm; 27. Two-way centering clamping cylinder; 28. Gripper; 29. ​​Second brush; 30. Cylinder; 31. Recycling box; 32. Guide channel. Detailed Implementation

[0019] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a cement mortar flexural and compressive strength testing system.

[0020] like Figures 1 to 6 As shown, this utility model discloses a cement mortar flexural and compressive strength testing system, including a workbench 1, a testing system for testing test blocks 2 mounted on the workbench 1, and a storage box 23 for storing the test blocks 2 around the workbench 1, as well as a feeding mechanism for transferring the test blocks 2 from the storage box 23 to the workbench 1. The feeding mechanism enables automatic feeding of the testing device. Simultaneously, a recycling box 31 is located on the side wall of the workbench 1 for collecting the tested test blocks 2. Waste material from the test can be directly and automatically fed into the recycling box 31, thus achieving automatic waste disposal. This testing system, through the integrated feeding mechanism, testing system, and recycling box 31, automates the entire process from test block 2 feeding, test block 2 testing, and waste material recycling. Operators only need to place batches of test blocks 2 into the storage box 23, saving the heavy and repetitive manual handling and placement of test blocks 2, reducing the labor intensity of operators, and improving work efficiency.

[0021] The testing system includes a flexural strength testing device located in the center of the top surface of the workbench 1 and compressive strength testing devices located on both sides of the flexural strength testing device. Two sets of compressive strength testing devices are provided to shorten the testing time and improve work efficiency. Furthermore, the flexural strength testing device is equipped with a cleaning component for removing waste residue, replacing the traditional manual cleaning process. The material feeding mechanism includes a robotic arm 26 located on one side of the workbench 1 and a mounting frame 224 at the free end of the robotic arm 26. The mounting frame 224 has a clamping mechanism for picking up and placing the test block 2, and a second brush 29 is located on the mounting frame 224 opposite the clamping mechanism to clean the waste residue on the compressive strength testing device. The robotic arm 26, clamping mechanism, flexural strength testing device, and compressive strength testing device are all controlled by a PLC programming system to automate their operation. The robotic arm 26 and clamping mechanism, through a programmed process, can accurately and repeatedly place the test block 2 into the designated positions of the flexural strength testing device and the compressive strength testing device. This replaces the problem of positional deviation or tilting caused by fatigue or technical differences when manually placing the test block 2, thus improving the accuracy of the test block 2.

[0022] Meanwhile, the cleaning components and the second brush 29 mounted on the mounting frame 224 of the robotic arm 26 can clean the waste residue on the flexural strength testing device and the compressive strength testing device respectively, eliminating the need for manual waste removal, saving time and effort and improving work efficiency.

[0023] In operation, the feeding mechanism is activated. The robotic arm 26 moves above the placement box 23, and the clamping mechanism on the mounting bracket 224 at its free end engages to grasp a test block 2. Controlled by the PLC programming system, the robotic arm 26 transports the test block 2 and places it onto the flexural strength testing device in the center of the top surface of the workbench 1. The flexural strength testing device completes the flexural strength test and breaks the test block 2. After the flexural strength test is completed, the robotic arm 26 moves again. The clamping mechanism grasps the broken test block 2. The robotic arm 26 works again, placing two test blocks 2 onto the compressive strength testing devices located on either side of the flexural strength testing device. The compressive strength testing devices then automatically complete the compressive strength test. It should be noted that after the test block 2 is removed from the flexural strength testing device, the cleaning component on the flexural strength testing device is activated to automatically clean the residual cement waste on the flexural strength testing device, preparing for the next test. As the robotic arm 26 rotates, the second brush 29, located on the opposite side of the clamping mechanism on the mounting frame 224, sweeps across the working surface of the compressive strength testing device, thus removing the waste residue and achieving automatic cleaning. The cleaned waste then enters the collection box.

[0024] The clamping mechanism described above consists of a bidirectional centering clamping cylinder 27 mounted on the mounting frame 224 and two grippers 28 mounted on the bidirectional centering clamping cylinder 27. When picking up or placing the test block 2, the PLC programming system controls the robotic arm 26 to move the bidirectional counterweight clamping cylinder, aligning the two grippers 28 with the test block 2. Then, the PLC programming system controls the bidirectional centering clamping cylinder 27 to move the grippers 28 to pick up or place the test block 2.

[0025] Specifically, the flexural strength testing device includes a first support frame 3 mounted on the top surface of the workbench 1, a lifting device mounted on the first support frame 3, and an upper pressure head 15 movable within the first support frame 3 at the bottom end of the lifting device. Furthermore, a receiving section for placing the test block 2 is provided inside the bottom surface of the first support frame 3. The test block 2 is placed on the receiving section, and then the lifting device is activated. The lifting device drives the lower pressure head to cooperate with the receiving section to perform flexural strength testing on the test block 2. The first support frame 3 includes a base plate 301 mounted on the top surface of the workbench 1, first columns 302 on both sides of the base plate 301, and a first top plate 303 on the top surface of the two first columns 302. The lifting device for moving the upper pressure head 15 includes a motor 11 located on the top surface of the first top plate 303 and connected to a PLC programming system, a ball screw 12 located at the output end of the motor 11, a screw nut 13 located on the bottom surface of the first top plate 303 and cooperating with the ball screw 12, a sleeve 131 located on the bottom surface of the screw nut 13 and fitted outside the ball screw 12, and a lower pressure head located on the bottom surface of the sleeve 131. A first guide frame 14 is located outside the sleeve 131 and cooperates with two first columns 302. The cooperation between the first guide frame 14 and the first columns 302 can provide guidance and limit for the sleeve 131 and the screw nut 13, so that during the rotation of the ball screw 12, the screw nut 13 drives the sleeve 131 and the upper pressure head 15 located on the bottom surface of the sleeve 131 to rise and fall under the action of the ball screw 12.

[0026] The sliding pair formed by the ball screw 12 and the screw nut 13 features high transmission efficiency, high positioning accuracy, and good axial rigidity, enabling the rotational motion of the motor 11 to be converted into precise, smooth, and slip-free linear motion. This allows the downward pressing speed of the upper pressure head 15 to decrease uniformly and controllably, improving the accuracy of the flexural strength test results of the test block 2.

[0027] The first guide frame 14 for limiting and guiding the ball screw 12 includes a first mounting plate 141 disposed on the sleeve 131 and first guide blocks 142 disposed at both ends of the first mounting plate 141 and slidably engaged with the first column 302. Figure 2As shown, the first column 302 is a cylinder 30, and the end face of the first guide block 142 has an arc-shaped groove adapted to the first column 302. When testing the flexural strength of the test block 2, the PLC programming system issues a command to start the test, and the motor 11 starts and rotates in the forward direction. The motor 11 drives the ball screw 12 to rotate synchronously. The screw nut 13 and the sleeve 131 move downward on the ball screw 12 under the action of the first mounting plate 141 and the first guide block 142. The sleeve 131 also drives the upper pressure head 15 to approach the test block 2. The upper pressure head 15 descends and contacts the upper surface of the test block 2. The motor 11 continuously provides torque, and the downward pressure is applied to the test block 2 through the ball screw 12, screw nut 13 and upper pressure head 15. As the downward pressure increases, the force sensor (not shown in the figure) integrated in the PLC programming system monitors and collects the load value in real time until it breaks at its flexural strength limit. When the PLC programming system detects a sudden drop in load value in real time, it immediately issues a command to stop motor 11. Subsequently, motor 11 reverses, driving ball screw 12 to rotate in the opposite direction, which in turn causes screw nut 13, sleeve 131, and upper pressure head 15 to rise and return to their initial positions, awaiting the next test.

[0028] To prevent excessive displacement of the test block 2 during the flexural strength test, which could prevent the test block 2 feeding mechanism from accurately grasping the broken test block 2, limiting members 16 that cooperate with the base plate 8 are provided at both ends of the bottom surface of the first mounting plate 141, and the limiting members 16 are C-shaped frames.

[0029] like Figure 3 As shown, the receiving part for placing the test block 2 includes a lower slide rail plate 4 on the base plate 301. An upper slide rail plate 7 is slidably mounted on the lower slide rail plate 4 via a connecting seat 6. The lower slide rail plate 4 has grooves for the connecting seat 6 to slide in, and an electric push rod 5 connected to the connecting seat 6 is mounted on the lower slide rail plate 4. The electric push rod 5 is controlled by a PLC programming system. A seat plate 8 is located on the top surface of the upper slide rail plate 7, and two cylinders 30 supporting the test block 2 are mounted on the seat plate 8. The test block 2 can be directly placed on the two cylinders 30 of the seat plate 8, leaving a gap between the bottom surface of the test block 2 and the top surface of the seat plate 8. This provides space for the test block 2 to break when the upper pressure head 15 performs flexural strength testing, and also allows for more accurate detection of the flexural strength of the test block 2.

[0030] The upper slide rail 7 and lower slide rail 4 are slidably connected by a connecting seat 6. An electric push rod 5 is installed on the upper slide rail 7. When the electric push rod 5 is activated, it drives the upper slide rail 7 to slide on the lower slide rail 4 via the connecting seat 6. That is, the seat plate 8 on the upper slide rail 7 can extend within the working range of the upper pressure head 15. After the seat plate 8 extends, the robotic arm 26 will use a clamping mechanism to move the test block 2 precisely onto the cylinder 30 of the seat plate 8. Then, the electric push rod 5 will move the upper slide rail 7 and the seat plate 8 back to their initial positions via the connecting seat 6. At this time, the test block 2 on the seat plate 8 will be below the upper pressure head 15. The lifting device is then activated, and the lifting device drives the upper pressure head 15 to perform a flexural strength test on the test block 2. After the test is completed, the PLC programming system controls the robotic arm 26 and the clamping mechanism to pick up the two broken test blocks 2 and place them in two compressive strength testing devices for compressive strength testing.

[0031] After the flexural strength test of test block 2, residue will remain on the base plate 8. At this time, the cleaning assembly can be activated to clean the residue from the base plate 8. The cleaning assembly specifically consists of an electric push rod 29 mounted on the base plate 8 and a first brush 10 mounted on the telescopic end of the electric push rod 29 to clean the residue from the base plate 8. The electric push rod 29 is also controlled by a PLC programming system. After the robotic arm 26 removes test block 2 from the base plate 8 via the clamping mechanism, the PLC programming system controls the electric push rod 29 to operate, extending and retracting, and driving the first brush 10 to reciprocate. The reciprocating movement of the first brush 10 cleans the residue from the base plate 8, and the cleaned residue flows directly into the collection box. Cleaning the residue from the base plate 8 prevents the residue from accumulating and affecting the flat placement of test block 2, thus preventing test errors caused by the residue causing the test block 2 to tilt.

[0032] like Figure 1 and Figure 2 As shown, the compressive strength testing device includes a second support frame 17 located on the top surface of the workbench 1, and a hydraulic cylinder 19 is mounted on the second support frame 17. The hydraulic cylinder 19 is controlled by a PLC programming system. An upper pressure plate 21 is located on the telescopic end of the hydraulic cylinder 19, and a lower pressure plate 18 is located on the workbench 1 within the second support frame 17. The two broken test blocks 2 can be placed on the lower pressure plates 18 of the two compressive strength testing devices respectively. Then, the hydraulic cylinder 19 is activated, and the hydraulic cylinder 19 drives the upper pressure plate 21 to perform compressive strength testing on the test blocks 2 placed on the lower pressure plate 18. After the compressive strength testing of the test blocks 2 is completed, the hydraulic cylinder 19 will drive the upper pressure plate 21 to rise to the initial position to prepare for the next compressive strength test.

[0033] To collect the fragments of test block 2 after the compressive strength test, a guide frame 181 is installed on the top surface of the workbench 1 within the second support frame 17. The guide frame 181 is triangular, and baffles higher than the guide frame 181 are installed on both sides of the guide frame 181. The lower pressure plate 18 passes through the guide frame 181. After the test is completed, the broken test block 2 automatically slides down the guide frame 181 to the recycling box 31 under the action of gravity. This achieves a seamless connection between the compressive strength test of test block 2 and waste recycling, eliminating the need for manual cleaning of the lower pressure plate 18 and improving efficiency. After the test block 2 on the lower pressure plate 18 has been tested, the robotic arm 26 drives the mounting frame 224 to rotate, causing the second brush 29 and the clamping mechanism to change position. At this time, the robotic arm 26 cleans the lower pressure plate 18 through the second brush 29.

[0034] like Figure 2 As shown, the second support frame 17 for supporting the hydraulic cylinder 19 includes two sets of second columns 171 disposed on the top surface of the workbench 1, and each set of second columns 171 consists of two columns. The top surfaces of the second columns 171 are connected by a second top plate 172. The hydraulic cylinder 19 is disposed on the second top plate 172, and the guide frame 181 is located between the two sets of second columns 171.

[0035] To prevent angular deviation when the extension rod of the hydraulic cylinder 19 lowers the upper pressure plate 21, a second guide frame 20 is provided on the extension rod of the hydraulic cylinder 19 to cooperate with the second support frame 17. Specifically, the second guide frame 20 includes a second mounting plate 201 on the extension rod of the hydraulic cylinder 19, and the side wall of the second mounting plate 201 is provided with second guide blocks 202 that slide in cooperation with each of the second columns 171. When the extension end of the hydraulic cylinder 19 extends or retracts, the second mounting plate 201 on its extension rod also moves accordingly. Furthermore, the second mounting plate 201, through the cooperation of the second guide blocks 202 and the second columns 171, limits the extension rod of the hydraulic cylinder 19, ensuring that the extension rod of the hydraulic cylinder 19 always remains vertically movable.

[0036] It should be noted that the recycling bin 31 contains a waste cart (not shown in the figure) that can be pulled out from inside to collect waste. The recycling bin 31 also has a guide channel 32 on it to guide the waste sliding down from the guide frame 181. The guide channel 32 is a flat cone shape, wider at the top and narrower at the bottom. The waste falling from the guide frame 181 and the seat plate 8 will directly enter the guide channel 32, and then from there into the waste cart inside the recycling bin 31. When it is necessary to clean the material in the waste cart, simply pull the waste cart out of the recycling bin 31 and then clean out the material inside.

[0037] The guide channel 32 includes an alignment fixture 22 for aligning the test block 2 after bending resistance testing. This fixture provides a calibration platform for the broken test block 2. The robotic arm 26, through a clamping mechanism, places the broken, irregular test block 2 onto the fixture. The alignment fixture 22 adjusts the test block 2 to a uniform posture and position, ensuring that the robotic arm 26 can subsequently grip and precisely place the test block 2 onto the center of the lower pressure plate 18 of the compression machine in a completely consistent manner. Specifically, the alignment fixture 22 includes a U-shaped mounting frame 224 located within the guide channel 32. Guide grooves 223 are formed on the two vertical plates of the mounting frame 224. An L-shaped alignment frame 221, rotatable via a pivot, is located within the mounting frame 224. Multiple isolation rods 222 are arranged along the contour of the alignment frame 221. Meanwhile, a fastening bolt is threaded onto the alignment frame 221 to limit the position of the mounting frame 224 and the alignment frame 221, and the bolt can pass through the guide groove 223.

[0038] After the flexural strength test of test block 2 is completed, the robotic arm 26 picks up a section of test block 2 and places it on the isolation rod 222 of the L-shaped alignment frame 221 of the alignment fixture 22. Under its own weight, test block 2 will naturally slide and adjust its posture. Then, the robotic arm 26 transfers the calibrated test block 2 to the lower pressure plate 18 of the compressive strength testing device for subsequent testing. When the specifications of test block 2 are changed or the angle of the alignment work needs to be adjusted, the fastening bolts can be loosened. The L-shaped alignment frame 221 can be rotated through the guide groove 223 to change its tilt angle, thereby creating a new calibration space for the new specification test block 2. After adjustment, the bolts can be tightened to fix it.

[0039] like Figure 1 and Figure 4 As shown, multiple sets of limiting posts 24 are distributed on the top surface of the placement box 23, and each set of limiting posts 24 includes at least three limiting posts 24. The arrangement of the three limiting posts 24 forms a limiting grid for the test block 2, ensuring that all test blocks 2 have a uniform and consistent position and orientation after being placed in the placement box 23. This serves the same purpose as the alignment fixture 22, both aiming to calibrate the position of the test block 2. This allows the robotic arm 26 to place the test block 2 on the base plate 8 in a uniform position via the clamping mechanism, making the flexural strength testing structure of the test block 2 more accurate.

[0040] To maintain the test block 2 on the placement box 23, multiple sets of humidification holes 25 are provided on the top surface of the placement box 23, and each set of humidification holes 25 surrounds the test block 2 placed on the placement box 23. A humidifier connected to each set of humidification holes 25 is provided inside the placement box 23. The humidifier can create a uniform and stable humidity environment for the test block 2, so that the surface of the test block 2 is always kept in the standard required moist state during the waiting period for testing.

[0041] Working Principle: The operator places batches of cured test blocks 2 into the limiting posts 24 of the placement box 23 for temporary storage and activates the humidifier to create a humid environment for the test blocks 2 on the placement box 23. Then, the robotic arm 26 moves above the placement box 23 according to the instructions of the PLC programming system and drives two grippers 28 to grab one test block 2 through the bidirectional centering clamping cylinder 27. Simultaneously, the electric push rod 5 pushes the slide rail upper plate 7 and the seat plate 8 to extend through the connecting seat 6, and the robotic arm 26 moves the test block 2 to the anti-bending device and precisely places it on the two cylinders 30 of the seat plate 8. Subsequently, the electric push rod 5 retracts, sending the test block 2 directly under the upper pressure head 15. Then, the PLC programming system controls the lifting device to drive the upper pressure head 15 downward at a uniform speed, applying a load to the test block 2 until it breaks. The force sensor records the peak fracture force in real time. After the test block 2 breaks, the robotic arm 26 grabs the two pieces of the test block 2 and removes them. The broken test block 2 is placed on the alignment fixture 22 in the guide channel 32 of the recycling bin 31 for alignment. Then, the electric push rod 9 of the cleaning component is activated, driving the first brush 10 to reciprocate, sweeping the residual waste on the seat plate 8 into the recycling bin 31. After the broken test block 2 is aligned, the robotic arm 26 picks up the calibrated test block 2 from the alignment fixture 22 and places it on the lower pressure plate 18 of the compressive strength testing device. The PLC programming system controls the hydraulic cylinder 19 to start, and its extension rod, constrained by the second guide frame 20 and the second column 171, drives the upper pressure plate 21 to press down vertically, crushing the test block 2. The pressure sensor records the compressive strength value. After the compression test is completed, the crushed test block 2 naturally falls to the guide frame 181, slides along the inclined plane into the guide channel 32, and finally falls into the waste cart in the recycling bin 31. During the transfer process of the robotic arm 26, the second brush 29 on its mounting frame 224 sweeps across the surface of the lower pressure plate 18 as it moves, automatically removing residual waste residue. The waste residue will also enter the waste cart in the recycling bin 31 through the guide frame 181 and the guide channel 32.

[0042] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A system for testing the flexural and compressive strength of cement mortar, characterized in that: Includes a workbench (1), a testing system for testing test blocks (2) is provided on the workbench (1), a storage box (23) for storing test blocks (2) is provided around the workbench (1), and a feeding mechanism for transferring test blocks (2) from the storage box (23) to the workbench (1) so as to enable automatic feeding of the testing device; The side wall of the workbench (1) is equipped with a recycling bin (31) for collecting the test blocks (2) after testing. The waste material after testing can be directly and automatically put into the recycling bin (31). The testing system includes a flexural strength testing device located in the middle of the top surface of the workbench (1) and a compressive strength testing device located on both sides of the flexural strength testing device. A cleaning component for cleaning the waste residue on the flexural strength testing device is provided on the flexural strength testing device. The feeding mechanism includes a robotic arm (26) located on one side of the workbench (1), a mounting frame (224) located at the free end of the robotic arm (26), and a clamping mechanism on the mounting frame (224) for picking up and placing the test block (2), and a second brush (29) on the mounting frame (224) opposite to the clamping mechanism for cleaning the waste residue on the compressive strength testing device.

2. The cement mortar flexural and compressive strength testing system according to claim 1, characterized in that: The flexural strength testing device includes a first support frame (3) on the top surface of the workbench (1), a lifting device on the first support frame (3), and an upper pressure head (15) that can move within the first support frame (3) at the bottom end of the lifting device. The bottom surface of the first support frame (3) is provided with a receiving part for placing test blocks (2).

3. The cement mortar flexural and compressive strength testing system according to claim 2, characterized in that: The first support frame (3) includes a base plate (301) on the top surface of the workbench (1), first columns (302) on both sides of the base plate (301), and a first top plate (303) on the top surface of the two first columns (302). The lifting device includes a motor (11) located on the top surface of the first top plate (303), a ball screw (12) located at the output end of the motor (11), a screw nut (13) located on the bottom surface of the first top plate (303) and cooperating with the ball screw, a sleeve (131) located on the bottom surface of the screw nut (13) and sleeved outside the ball screw (12), and a first guide frame (14) located outside the sleeve (131), the first guide frame (14) cooperating with two first columns (302); The pressure head is located on the bottom surface of the sleeve (131); The first guide frame (14) includes a first mounting plate (141) disposed on the sleeve (131) and a first guide block (142) disposed at both ends of the first mounting plate (141) and slidingly engaged with the first column (302). The bottom surface of the first mounting plate (141) is provided with limiting parts (16) that cooperate with the base plate (8).

4. The cement mortar flexural and compressive strength testing system according to claim 2, characterized in that: The receiving part includes a lower slide rail plate (4) on the base plate (301), an upper slide rail plate (7) is slidably provided on the lower slide rail plate (4) via a connecting seat (6), and an electric push rod (5) connected to the connecting seat (6) is provided on the lower slide rail plate (4). A seat plate (8) is provided on the top surface of the upper slide rail plate (7), and two cylinders (30) supporting the test block (2) are provided on the seat plate (8).

5. The cement mortar flexural and compressive strength testing system according to claim 1, characterized in that: The cleaning assembly includes an electric push rod 2 (9) mounted on the seat plate (8), and the telescopic end of the electric push rod 2 (9) is provided with a first brush (10) for cleaning residue from the seat plate (8).

6. The cement mortar flexural and compressive strength testing system according to claim 1, characterized in that: The compressive strength testing device includes a second support frame (17) on the top surface of the workbench (1), and a hydraulic cylinder (19) is provided on the second support frame (17), and an upper pressure plate (21) is provided at the telescopic end of the hydraulic cylinder (19). A lower pressure plate (18) is provided on the workbench (1) inside the second support frame (17), and a second guide frame (20) that cooperates with the second support frame (17) is provided on the telescopic rod of the hydraulic cylinder (19). The top surface of the workbench (1) is located inside the second support frame (17) and is provided with a guide frame (181). The guide frame (181) is triangular and has baffles on both sides of the guide frame (181) that are higher than the guide frame (181). The lower pressure plate (18) passes through the guide frame (181).

7. The cement mortar flexural and compressive strength testing system according to claim 6, characterized in that: The second support frame (17) includes two sets of second columns (171) on the top surface of the workbench (1), and each set of second columns (171) consists of two second columns (171), and the top surfaces of the second columns (171) are connected by a second top plate (172). The hydraulic cylinder (19) is located on the second top plate (172), and the guide frame (181) is located between the two sets of second columns (171); The second guide frame (20) includes a second mounting plate (201) mounted on the telescopic rod of the hydraulic cylinder (19), and the side wall of the second mounting plate (201) is provided with a second guide block (202) that slides with each of the second columns (171).

8. The cement mortar flexural and compressive strength testing system according to claim 7, characterized in that: The top surface of the placement box (23) is distributed with multiple sets of limiting posts (24), and each set of limiting posts (24) includes at least three limiting posts (24). Multiple sets of humidifying holes (25) are opened on the top surface of the placement box (23), and each set of humidifying holes (25) surrounds the test block (2) placed on the placement box (23). A humidifier connected to each set of humidifying holes (25) is provided inside the placement box (23).

9. The cement mortar flexural and compressive strength testing system according to claim 1, characterized in that: The recycling bin (31) is equipped with a waste cart that can be extracted from its interior and can collect waste, and a guide channel (32) is provided on the recycling bin (31) to guide the waste that slides off the guide frame (181). An alignment fixture (22) is provided in the guide channel (32) for aligning the test block (2) after bending resistance test. The alignment fixture (22) includes a U-shaped mounting frame (224) in the guide channel (32). Guide grooves (223) are opened on the two vertical plates of the mounting frame (224). An L-shaped alignment frame (221) is provided in the mounting frame (224) and rotates through a pivot. Multiple isolation rods (222) are provided inside the alignment frame (221) along its outline. The alignment frame (221) is threaded with a fastening bolt that can position the mounting frame (224) and the alignment frame (221), and the bolt can pass through the guide groove (223).

10. A cement mortar flexural and compressive strength testing system according to claim 9, characterized in that: The clamping mechanism includes a bidirectional centering clamping cylinder (27) mounted on the mounting frame (224) and two jaws (28) mounted on the bidirectional centering clamping cylinder (27).

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