Cement mortar sample strength detection equipment

Abstract

The utility model relates to cement mortar sample strength detection equipment, and belongs to the technical field of cement strength detection.The cement mortar sample strength detection equipment comprises a workbench, a door-shaped frame is fixedly arranged on the surface of the workbench, pressurizing equipment is fixedly installed on the door-shaped frame, the cement mortar sample strength detection equipment further comprises a test board, the test board is arranged between the pressurizing equipment and the workbench, and a rotating rod is fixedly connected to the test board; the two ends of the rotating rod are rotationally connected with a first supporting plate and a second supporting plate correspondingly, and the rotating rod rotates around the central axis of the rotating rod. The cleaning assembly comprises a telescopic oil cylinder, a rotating motor and a scraper, the telescopic oil cylinder is fixedly installed on the workbench, the rotating motor is connected with the end of a piston rod of the telescopic oil cylinder, and one end of the scraper is fixed to an output shaft of the rotating motor; the overturning assembly is used for driving the rotating rod to rotate around the central axis of the rotating rod, and the effect of improving the accuracy of a detection result is achieved.

Description

Technical Field

[0001] This application relates to the technical field of cement strength detection, and particularly to a device for detecting the strength of cement mortar specimens. Background Art

[0002] Cement mortar is a mixture of cement and mortar, which is used in construction. Before use, it is necessary to detect the strength of the cement mortar.

[0003] When detecting the strength of cement mortar, usually first make cement mortar test blocks, then place the cement mortar test blocks at the center of the surface of the test bench, and then start the pressurizing device to uniformly apply load to the cement mortar test blocks until the cement mortar test blocks are damaged, and then record the test data.

[0004] After the cement mortar test blocks are damaged after detection, due to the material characteristics of the cement mortar, they often break into several small pieces and particles and scatter on the surface of the test bench. The cement mortar particles remaining on the bench will affect the subsequent test results, and there is a defect of low accuracy of the test results. Utility Model Content

[0005] In order to improve the accuracy of the test results, this application provides a device for detecting the strength of cement mortar specimens.

[0006] The device for detecting the strength of cement mortar specimens provided by this application adopts the following technical solutions:

[0007] A device for detecting the strength of cement mortar specimens includes a workbench, a gantry is fixedly arranged on the surface of the workbench, a pressurizing device is fixedly installed on the gantry, and further includes:

[0008] A test bench, which is arranged between the pressurizing device and the workbench. A rotating rod is fixedly connected to the test bench, and the two ends of the rotating rod are respectively rotatably connected to a first support plate and a second support plate, and the rotating rod rotates around its own central axis;

[0009] A cleaning component, which includes a telescopic oil cylinder, a rotating motor and a scraper. The telescopic oil cylinder is fixedly installed on the workbench, the rotating motor is connected to the end of the piston rod of the telescopic oil cylinder, and one end of the scraper is fixed to the output shaft of the rotating motor;

[0010] A flipping component, which is used to drive the rotating rod to rotate around its own central axis.

[0011] Adopting the above technical solutions, after the test is completed, the flipping component flips the test bench 180 degrees through the rotating rod, then the telescopic oil cylinder is started to make the scraper abut against the test bench. When the rotating motor is started, the scraper cleans the surface of the test bench, thereby cleaning the surface of the test bench and reducing the influence on subsequent tests, and improving the accuracy of the test results.

[0012] Optionally, a substrate is provided on one side of the test bench. The substrate is fixed to the workbench. A driving roller is disposed through the substrate. The driving roller is rotatably connected to the substrate about its own central axis. A driving groove is spirally formed on the driving roller, and the driving groove is connected end to end. A moving plate is disposed between the substrate and the test bench. A driving block slidably adapted to the driving groove is fixedly provided on the moving plate. A guiding rod is fixedly provided on the moving plate. The guiding rod penetrates through the substrate and is slidably adapted to the substrate. A cushion block is fixedly provided on the side of the moving plate facing the test bench. The cushion block is used to support the test bench.

[0013] A driving assembly for driving the driving roller to rotate is provided on the workbench.

[0014] With the above technical solution, when the driving roller rotates, the guiding rod guides the moving rod, so that the driving roller makes the moving plate slide along the length direction of the guiding rod through the driving block and the driving groove, thereby changing the position of the cushion block by changing the position of the moving plate.

[0015] Optionally, the flipping assembly includes a driving ring, a flipping bevel gear ring and a flipping bevel gear. The driving ring is rotatably connected to the workbench. The driving ring rotates about its own central axis. A transmission ring is annularly fixed to the inner wall of the driving ring. The flipping bevel gear ring is fixedly provided on the transmission ring. The flipping bevel gear is fixed to the rotating rod, and the flipping bevel gear is meshed and adapted to the flipping bevel gear ring.

[0016] The driving ring drives the driving roller to rotate through the driving assembly.

[0017] A limiting assembly for keeping the test bench in a horizontal state is provided on the second support plate.

[0018] With the above technical solution, during the rotation of the driving ring, the flipping bevel gear rolls along the flipping bevel gear ring, so that the flipping bevel gear makes the rotating rod rotate about its own central axis, thereby flipping the test bench by 180 degrees.

[0019] Optionally, the driving assembly includes a driving bevel gear, a first driving bevel gear ring and a second driving bevel gear ring. The driving bevel gear is fixed to the driving roller. The first driving bevel gear ring and the second driving bevel gear ring are both fixedly provided on the transmission ring. The first driving bevel gear ring, the second driving bevel gear ring and the flipping bevel gear ring have the same length. The first driving bevel gear ring is in contact with the flipping bevel gear ring. The distance between the second driving bevel gear ring and the first driving bevel gear ring is twice the length of the flipping bevel gear ring.

[0020] With the above technical solution, when the first driving bevel gear ring starts to mesh with the driving bevel gear, the second driving bevel gear ring is not meshed with the driving bevel gear, and the turning bevel gear ring is not meshed with the turning bevel gear. When the driving ring rotates, the first driving bevel gear ring causes the driving bevel gear to drive the driving roller to rotate; when the first driving bevel gear ring ends meshing with the driving bevel gear, the second driving bevel gear ring is not meshed with the driving bevel gear, and the turning bevel gear ring starts to mesh with the turning bevel gear. The driving ring continues to rotate, and through the turning bevel gear ring, the turning bevel gear drives the rotating rod to rotate; when the turning bevel gear ring ends meshing with the turning bevel gear, the second driving bevel gear ring starts to mesh with the driving bevel gear. Neither the driving bevel gear nor the turning bevel gear meshes with the first driving bevel gear, and the turning bevel gear ring is not meshed with the turning bevel gear. The driving ring continues to rotate, and through the second bevel gear ring, the driving bevel gear drives the driving roller to rotate; when it is necessary to turn the test bench again, just change the rotation direction of the driving ring. In the above way, the cushion block is pulled out from under the test bench, then the test bench is turned 180 degrees, and finally the cushion block is sent under the test bench.

[0021] Optionally, the limiting assembly includes a balance plate, a limiting plate and a fixing plate. There are two balance plates, and the two balance plates are respectively fixed on both sides of the rotating rod. There is one fixing plate and one limiting plate. The fixing plate is fixed to the second support plate. The limiting plate is located on the side of the fixing plate facing the rotating rod. The limiting plate is used to block the balance plate, and a telescopic spring is fixed between the limiting plate and the fixing plate.

[0022] With the above technical solution, when the test bench turns, the rotating rod compresses the telescopic spring by pressing the limiting plate through the balance plate. Thus, the rotating rod can rotate around its own central axis; after the test bench turns over, through the balance plate and the limiting plate, the rotating rod will not rotate without external force. Thus, the rotating rod is kept stable without external force, and thus the test bench is kept stable after turning over.

[0023] Optionally, there are two test benches, and the rotating rod passes through the middle of the two test benches, and the rotating rod is fixedly connected to both test benches.

[0024] With the above technical solution, the rotating rod exchanges the positions of the two test benches. When one test bench is being cleaned, the other test bench can be used for testing first, reducing the waiting time, thereby improving the detection efficiency.

[0025] Optionally, a lifting platform is fixed to the end of the piston rod of the telescopic oil cylinder. A collection box is placed on the lifting platform. Positioning plates are fixed on both sides of the lifting platform. Positioning bolts are connected to the positioning plates by internal threads. The positioning bolts are used to press against the collection box.

[0026] With the above technical solution, the collection box is pressed tightly by the positioning bolts, so that the collection box is fixed on the lifting table. Thus, the collection box remains stable when the scraper is cleaning, achieving the effect that the scraper can clean stably; the collection box is detachably connected, and after the detection is completed, the collection box can be taken out to clean the residue in the collection box.

[0027] Optionally, a protective cover is provided on the driving motor.

[0028] With the above technical solution, the cement mortar particles cleaned from the test bench will not affect the rotating motor through the protective cover, thus achieving the effect of protecting the rotating motor.

[0029] In summary, the present application includes the following beneficial technical effects:

[0030] After the test is completed, the flipping assembly rotates the rotating rod 180 degrees around its own central axis, thus swapping the positions of the two test benches. At this time, another test bench can be used for testing first, reducing the waiting time, thereby improving the detection efficiency; then the telescopic oil cylinder is activated to make the scraper abut against the test bench. When the rotating motor is started, the scraper cleans the surface of the test bench, thus cleaning the surface of the test bench clean, reducing the influence on subsequent tests, and improving the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of a cement mortar specimen strength detection device according to an embodiment of the present application;

[0032] Figure 2 is a partial schematic diagram showing the structure of the limiting component in an embodiment of the present application;

[0033] Figure 3 is a schematic structural diagram showing the movement mode of the cushion block in an embodiment of the present application;

[0034] Figure 4 is a cross-sectional view showing the movement mode of the moving plate in an embodiment of the present application;

[0035] Figure 5 is a partial cross-sectional view showing the structure of the cleaning component in an embodiment of the present application;

[0036] Figure 6 is a schematic structural diagram showing the positions of the positioning plate and the positioning bolts in an embodiment of the present application.

[0037] In the figure, 1 is a workbench; 11 is a gantry; 12 is a pressurizing device; 13 is a first support plate; 14 is a second support plate; 15 is a substrate; 151 is a driving roller; 1511 is a driving groove; 16 is a storage cavity; 2 is a test bench; 21 is a rotating rod; 3 is a cleaning assembly; 31 is a telescopic oil cylinder; 32 is a rotating motor; 33 is a scraper; 4 is a driving assembly; 41 is a driving bevel gear; 42 is a first driving bevel gear ring; 43 is a second driving bevel gear ring; 5 is a flipping assembly; 51 is a driving ring; 511 is a transmission ring; 512 is a screw rod; 513 is a shifting rod; 52 is a flipping bevel gear ring; 53 is a flipping bevel gear; 6 is a moving plate; 61 is a driving block; 62 is a guiding rod; 63 is a cushion block; 7 is a limiting assembly; 71 is a balancing plate; 72 is a limiting plate; 73 is a fixing plate; 731 is a telescopic spring; 8 is a lifting platform; 81 is a positioning plate; 811 is a positioning bolt; 82 is a collection box; 9 is a protective cover. Detailed implementation mode

[0038] The following is a further detailed description of this application in conjunction with the attached Figure 1-6 drawings.

[0039] An embodiment of this application discloses a cement mortar specimen strength detection device.

[0040] Referring to Figure 1 , a cement mortar specimen strength detection device includes a workbench 1. A gantry 11 is fixedly arranged on the surface of the workbench 1. A pressurizing device 12 is fixedly installed on the gantry 11. The pressurizing device 12 is an existing device that can provide pressure to cement mortar, which will not be elaborated in this application. There are two test benches 2 arranged between the pressurizing device 12 and the workbench 1. A cleaning assembly 3 is arranged on one side of the workbench 1 facing the test bench 2.

[0041] After the cement mortar is detected by the pressurizing device 12, the two test benches 2 exchange positions, and the test continues through the upper test bench 2. At the same time, the lower test bench 2 is cleaned by the cleaning assembly 3.

[0042] Referring to Figure 1 , both of the two test benches 2 are placed horizontally and are arranged oppositely. A rotating rod 21 penetrates through the middle of the two test benches 2, and the rotating rod 21 is fixedly connected to both of the two test benches 2.

[0043] Referring to Figure 1, a flipping assembly 5 is arranged on the workbench 1. The flipping assembly 5 includes a driving ring 51 which is rotatably connected to the workbench 1 and rotates around its own central axis. A transmission ring 511 is annularly and fixedly arranged on the inner wall of the driving ring 51. A screw rod 512 is connected to the driving ring 51 by internal threads. A plurality of screw rods 512 are evenly spaced around the central axis of the driving ring 51. The screw rod 512 is used to press against the workbench 1. A plurality of shift rods 513 are evenly spaced around the outer wall of the driving ring 51 around its own central axis.

[0044] Reference Figure 1 , both ends of the rotating rod 21 are respectively rotatably connected to a first support plate 13 and a second support plate 14. The rotating rod 21 rotates around its own central axis. Both ends of the rotating rod 21 respectively penetrate through the first support plate 13 and the second support plate 14. The first support plate 13 is arranged inside the inner ring of the transmission ring 511, and the second support plate 14 is arranged outside the outer ring of the driving ring 51. Both the first support plate 13 and the second support plate 14 are fixed to the workbench 1.

[0045] Reference Figure 2 , a limiting assembly 7 is arranged on the second support plate 14. The limiting assembly 7 includes a balance plate 71, a limiting plate 72 and a fixing plate 73. There are two balance plates 71 which are respectively fixedly arranged on both sides of the rotating rod 21. There is one fixing plate 73 and one limiting plate 72. The fixing plate 73 is fixed to the second support plate 14. The limiting plate 72 is used to block the balance plate 71. A telescopic spring 731 is fixedly arranged between the limiting plate 72 and the fixing plate 73.

[0046] Reference Figure 1 , the flipping assembly 5 further includes a flipping bevel gear ring 52 and a flipping bevel gear 53. The flipping bevel gear ring 52 is fixedly arranged on the transmission ring 511. The flipping bevel gear 53 is sleeved on one end of the rotating rod 21 close to the first support plate 13. The flipping bevel gear 53 is fixed to the rotating rod 21, and the flipping bevel gear 53 is meshed and matched with the flipping bevel gear ring 52.

[0047] Reference Figure 1 、 Figure 3 and Figure 4, on one side of the test bench 2, a substrate 15 is provided. The substrate 15 is fixed to the workbench 1. A driving roller 151 is penetrated through the substrate 15. The driving roller 151 is rotationally connected to the substrate 15 around its own central axis. A driving groove 1511 is spirally formed at one end of the driving roller 151 close to the test bench 2. The driving grooves 1511 are connected end to end. A moving plate 6 is arranged between the substrate 15 and the test bench 2. A driving block 61 slidably adapted to the driving groove 1511 is fixed on the moving plate 6. Guide rods 62 are fixed on the moving plate 6. There are two guide rods 62, and the two guide rods 62 are respectively arranged on both sides of the moving plate 6. The end of the guide rod 62 far from the moving plate 6 penetrates through the substrate 15 and the two are slidably adapted. A cushion block 63 is fixed on the side of the moving plate 6 facing the test bench 2. The cushion block 63 extends into the middle of the two test benches 2 and is used to support the upper test bench 2.

[0048] Reference Figure 3 , a driving assembly 4 is arranged in the inner ring of the driving ring 51. The driving assembly 4 includes a driving bevel gear 41, a first driving bevel gear ring 42 and a second driving bevel gear ring 43. The driving bevel gear 41 is sleeved on the driving roller 151 and the two are fixed. The first driving bevel gear ring 42 and the second driving bevel gear ring 43 are both fixed on the transmission ring 511. The first driving bevel gear ring 42 and the second driving bevel gear ring 43 are both of the same length as the flipping bevel gear ring 52. The first driving bevel gear ring 42 is in contact with the flipping bevel gear ring 52. The distance between the second driving bevel gear ring 43 and the first driving bevel gear ring 42 is twice the length of the flipping bevel gear ring 52.

[0049] When the first driving bevel gear ring 42 starts to mesh with the driving bevel gear 41, the second driving bevel gear ring 43 is not meshed with the driving bevel gear 41, and the flipping bevel gear ring 52 is not meshed with the flipping bevel gear 53. When the driving ring 51 is rotated through the lever 513, the first driving bevel gear ring 42 makes the driving bevel gear 41 drive the driving roller 151 to rotate. The rotation of the driving roller 151 drives the moving plate 6 to move away from the test bench 2 along the guide rod 62 through the driving block 61 and the driving groove 1511. Thus, the moving plate 6 pulls out the cushion block 63 from the middle of the two test benches 2.

[0050] When the first driving bevel gear ring 42 ends meshing with the driving bevel gear 41, the second driving bevel gear ring 43 is not meshed with the driving bevel gear 41, and the flipping bevel gear ring 52 starts to mesh with the flipping bevel gear 53. The continuous rotation of the driving ring 51 makes the flipping bevel gear 53 drive the rotating rod 21 to rotate through the flipping bevel gear ring 52, so as to swap the positions of the two test benches 2; during the process of swapping the positions of the two test benches 2, the rotating rod 21 presses the limiting plate 72 through the balance plate 71. At this time, the telescopic spring 731 is compressed; after the positions of the two test benches 2 are swapped, the elastic force is released through the balance plate 71, the limiting plate 72 and the telescopic spring 731 so that the rotating rod 21 will not rotate without external force.

[0051] When the flip bevel gear ring 52 ends the engagement with the flip bevel gear 53, the second drive bevel gear ring 43 starts to engage with the drive bevel gear 41, and neither the drive bevel gear 41 nor the flip bevel gear 53 engages with the first drive bevel gear 41. The flip bevel gear ring 52 does not engage with the flip bevel gear 53, and the drive ring 51 continues to rotate through the second bevel gear ring so that the drive bevel gear 41 drives the drive roller 151 to rotate, thereby the drive roller 151 drives the movable plate 6 to move along the guide rod 62 away from the test bench 2 through the drive block 61 and the drive groove 1511, thereby inserting the pad 63 between the two test benches 2 and supporting the test bench 2 located above.

[0052] Twist the screw 512 so that the screw 512 no longer presses against the workbench 1, then pull out the cushion block 63 from under the test bench 2, flip the test bench 2 180 degrees, and then send the cushion block 63 between the two test benches 2, and finally twist the screw 512 again so that the screw 512 presses against the workbench 1. The above process is a movement cycle, and one movement cycle can realize the exchange of positions of the two test benches 2 once. When the test bench 2 needs to be flipped again, the rotation direction of the drive ring 51 can be changed.

[0053] refer to Figure 5 and Figure 6 A storage chamber 16 is provided on the upper surface of the workbench 1, and a cleaning assembly 3 is arranged in the storage chamber 16. The cleaning assembly 3 includes a telescopic cylinder 31, and the telescopic cylinder 31 is fixedly installed in the storage chamber 16 of the workbench 1. A lifting platform 8 is fixedly provided at the end of the piston rod of the telescopic cylinder 31. A collection box 82 is placed on the side of the lifting platform 8 away from the telescopic cylinder 31. Positioning plates 81 are provided on both sides of the collection box 82. The positioning plates 81 are fixed to the lifting platform 8. The positioning bolts 811 are connected to the inner threads of the positioning plates 81, and the positioning bolts 811 are used to tighten the collection box 82.

[0054] refer to Figure 5 The cleaning assembly 3 also includes a rotating motor 32 and a scraper 33. The rotating motor 32 is fixedly installed in the collecting box 82. A protective cover 9 is provided on the rotating motor 32. The protective cover 9 is fixed to the collecting box 82. The output shaft of the rotating motor 32 passes through the protective cover 9 and the two are rotatably connected. One end of the scraper 33 is fixed to the output shaft of the rotating motor 32, and the scraper 33 is arranged in the horizontal direction.

[0055] After the two test benches 2 are swapped, the telescopic cylinder 31 is started to drive the rotating motor 32 and the scraper 33 through the lifting platform 8 to approach the test bench 2 located below until the scraper 33 abuts against the test bench 2 located below, and then the rotating motor 32 is started. After the rotating motor 32 is started, it drives the scraper 33 to clean the test bench 2 located below, and the cleaned residue falls into the collection box 82.

[0056] After the detection of the strength of the cement mortar is completed, the staff rotates the positioning bolt 811 so that the positioning bolt 811 moves away from the collection box 82, thereby enabling the collection box 82 to be removed from the lifting platform 8, which facilitates the cleaning of the collection box 82.

[0057] The implementation principle of the cement mortar sample strength detection device according to the embodiment of the present application is as follows: After the test is completed, first pull out the cushion block 63 from between the two test benches 2, then rotate the rotating rod 21 by 180 degrees to swap the positions of the two test benches 2, and then place the cushion block 63 between the two test benches 2. After the telescopic oil cylinder 31 is started, the scraper 33 is abutted against the test bench 2. When the rotating motor 32 is started, the scraper 33 cleans the surface of the test bench 2, thereby cleaning the tabletop of the test bench 2, reducing the influence on subsequent tests, and improving the accuracy of the detection results.

[0058] The embodiments of the present specific implementation manners are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A cement mortar sample strength testing device, comprising a workbench (1), a portal frame (11) is fixedly provided on the surface of the workbench (1), a pressure device (12) is fixedly installed on the portal frame (11), and the characteristics are: Also includes: A test bench (2), the test bench (2) is arranged between the pressurizing device (12) and the workbench (1), a rotating rod (21) is fixedly connected to the test bench (2), two ends of the rotating rod (21) are respectively rotatably connected to a first support plate (13) and a second support plate (14), and the rotating rod (21) rotates around its own central axis; A cleaning assembly (3), the cleaning assembly (3) comprising a telescopic oil cylinder (31), a rotating motor (32) and a scraper (33), the telescopic oil cylinder (31) being fixedly mounted on the workbench (1), the rotating motor (32) being connected to the end of the piston rod of the telescopic oil cylinder (31), and one end of the scraper (33) being fixed to the output shaft of the rotating motor (32); The turning assembly (5) is used to drive the rotating rod (21) to rotate around its own central axis.

2. A cement mortar sample strength testing device according to claim 1, characterized in that: A base plate (15) is provided on one side of the test bench (2), the base plate (15) is fixed to the workbench (1), a driving roller (151) is provided through the base plate (15), the driving roller (151) is rotatably connected to the base plate (15) around its own central axis, a driving groove (1511) is spirally provided on the driving roller (151), and the driving grooves (1511) are connected end to end, a moving plate (6) is provided between the base plate (15) and the test bench (2), a driving block (61) is fixedly provided on the moving plate (6) and is slidably matched with the driving groove (1511), a guide rod (62) is fixedly provided on the moving plate (6), the guide rod (62) passes through the base plate (15) and the two are slidably matched, and a cushion block (63) is fixedly provided on the side of the moving plate (6) facing the test bench (2), and the cushion block (63) is used to support the test bench (2); The workbench (1) is provided with a driving assembly (4) for driving the driving roller (151) to rotate.

3. A cement mortar sample strength testing device according to claim 2, characterized in that: The flip assembly (5) comprises a driving ring (51), a flip bevel gear ring (52) and a flip bevel gear (53); the driving ring (51) is rotatably connected to the workbench (1); the driving ring (51) rotates around its own central axis; a transmission ring (511) is fixedly arranged on the inner wall of the driving ring (51) in an annular shape; the flip bevel gear ring (52) is fixedly arranged on the transmission ring (511); the flip bevel gear (53) is fixed to the rotating rod (21); and the flip bevel gear (53) is meshed and matched with the flip bevel gear ring (52); The driving ring (51) drives the driving roller (151) to rotate via the driving assembly (4); The second support plate (14) is provided with a limiting assembly (7) for keeping the test bench (2) in a horizontal state.

4. A cement mortar sample strength testing device according to claim 3, characterized in that: The driving assembly (4) comprises a driving bevel gear (41), a first driving bevel gear ring (42) and a second driving bevel gear ring (43); the driving bevel gear (41) is fixed to a driving roller (151); the first driving bevel gear ring (42) and the second driving bevel gear ring (43) are both fixedly arranged on a transmission ring (511); the first driving bevel gear ring (42), the second driving bevel gear ring (43) and the flip bevel gear ring (52) are of the same length; the first driving bevel gear ring (42) and the flip bevel gear ring (52) are in close contact with each other; and the spacing between the second driving bevel gear ring (43) and the first driving bevel gear ring (42) is twice the length of the flip bevel gear ring (52).

5. The cement mortar sample strength testing device according to claim 3 is characterized by: The limiting assembly (7) comprises a balancing plate (71), a limiting plate (72) and a fixing plate (73); two balancing plates (71) are provided, and the two balancing plates (71) are respectively fixed on both sides of the rotating rod (21); one fixing plate (73) and one limiting plate (72) are provided; the fixing plate (73) is fixed to the second supporting plate (14); the limiting plate (72) is located on a side of the fixing plate (73) facing the rotating rod (21); the limiting plate (72) is used to hinder the balancing plate (71); and a telescopic spring (731) is fixed between the limiting plate (72) and the fixing plate (73).

6. The cement mortar sample strength testing device according to claim 1, characterized in that: Two test benches (2) are provided, and a rotating rod (21) passes through the middle of the two test benches (2). The rotating rod (21) is fixedly connected to the two test benches (2).

7. The cement mortar sample strength testing device according to claim 1, characterized in that: A lifting platform (8) is fixedly provided at the piston rod end of the telescopic oil cylinder (31), a collection box (82) is placed on the lifting platform (8), positioning plates (81) are fixedly provided on both sides of the lifting platform (8), and positioning bolts (811) are connected to the positioning plates (81) through internal threads, and the positioning bolts (811) are used to press against the collection box (82).

8. The cement mortar sample strength testing device according to claim 1, characterized in that: A protective cover (9) is provided on the upper cover of the driving motor.

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