Magnesium phosphate cement-based concrete mechanical property detection equipment

Abstract

The invention discloses magnesium phosphate cement-based concrete mechanical property detection equipment, and relates to the technical field of magnesium phosphate cement-based concrete mechanical property detection equipment.The magnesium phosphate cement-based concrete mechanical property detection equipment comprises a workbench, a support is fixed to the top of the workbench, and a driving motor is fixed to the top of the support; a threaded rod is fixed to the output end of the driving motor, and the bottom of the threaded rod is rotationally installed on the top of the workbench. According to the magnesium phosphate cement-based concrete mechanical property detection equipment, through the arrangement of a protection device, when a pressure block moves downwards, a roller extrudes a concrete block and a placement plate to move downwards, so that a connecting column drives an extrusion block to move downwards, and through the cooperation of a rotating block and a rotating rod, a protection plate can be turned over; and the front face of the containing box can be shielded and protected through the protection plate, and the situation that when concrete blocks are crushed, broken stone is splashed to the body of a worker, and safety risks are brought to the worker is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of magnesium phosphate cement-based concrete mechanical property testing equipment, in particular to magnesium phosphate cement-based concrete mechanical property testing equipment. Background Art

[0002] Magnesium phosphate cement is a high-performance inorganic cementitious material with remarkable characteristics such as rapid setting, high early strength, good bonding performance, strong volume stability, high wear resistance and good durability. When testing the mechanical properties of magnesium phosphate cement-based concrete, pressure testing is required.

[0003] A concrete mechanical properties testing equipment with patent announcement number CN217359314U includes a frame, a pressure test assembly is slidably arranged in the frame, a workbench is arranged in the frame, a placement plate is arranged on the workbench, a scraper is slidably arranged on the placement plate, the scraper abuts against the placement plate, the scraper slides toward a side away from or close to an entrance and exit end of the frame, a driving member for driving the scraper to slide is arranged on the placement plate, and a collecting member for collecting debris is arranged on the frame, the scraper is driven by the driving member to move toward the entrance and exit end of the frame, the debris on the placement plate is scraped to the collecting member, the debris is collected, and the debris is cleaned without manually reaching into the frame for manual cleaning, so as to facilitate the cleaning of the debris generated by the test and reduce the labor intensity of the operator.

[0004] When the above-mentioned equipment performs mechanical testing on magnesium phosphate cement-based concrete, the magnesium phosphate cement-based concrete may break when it is squeezed, and because the front side of the baffle is in an expanded state, when the magnesium phosphate cement-based concrete breaks, it may cause concrete to splash, causing the fragments to splash onto the workers, posing a safety risk to the workers. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a magnesium phosphate cement-based concrete mechanical properties testing device, which solves the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a magnesium phosphate cement-based concrete mechanical property testing device, comprising a workbench, a bracket is fixed on the top of the workbench, a driving motor is fixed on the top of the bracket, a threaded rod is fixed on the output end of the driving motor, the bottom of the threaded rod is rotatably installed on the top of the workbench, the outer wall of the threaded rod is threadedly connected with a threaded plate, the threaded plate is slidably installed on the inner side of the bracket, and a pressure block is detachably installed on the bottom of the threaded plate. When a mechanical test is required, starting the driving motor can drive the threaded rod to rotate, so that the threaded plate moves on the threaded rod, and the threaded plate drives the pressure block to move downward to test the mechanical properties of the concrete. Concrete is subjected to mechanical testing, a placing box is fixed on the top of the workbench, a placing plate is slidably installed on the inner wall of the placing box, a connecting column is fixed on the bottom of the placing plate, a connecting spring is fixed on the bottom of the connecting column, the bottom of the connecting spring is fixed to the inner side of the placing box, a connecting seat is slidably installed on the inner wall of the pressure block, a roller is rotatably installed on the bottom of the connecting seat, a transmission spring is fixed on the top of the connecting seat, the top of the transmission spring is fixed to the inner side of the pressure block, a protective device to prevent splashing is provided on the outer wall of the placing box, a pushing device for calibrating the testing material is provided on the placing plate, and a striking device for knocking the pressure block is provided on the pressure block;

[0007] Among them, the protective device includes an extrusion block, a fixed block, a rotating rod, a protective plate, a rotating block, an inclined block, a return spring, teeth, a support block, a rotating shaft, a protective side plate and a gear; the extrusion block is fixed to the outer wall of the connecting column, the fixed block is fixed to the front of the placement box, the rotating rod is rotatably installed on the side wall of the fixed block, the protective plate is fixed to the outer wall of the rotating rod, the rotating block is fixed to the outer wall of the rotating rod, the side wall of the protective plate is fixed with a torsion spring, and the side of the torsion spring away from the protective plate is fixed to the side wall of the fixed block. When the roller of the pressure block moves downward to contact the concrete block on the placement plate, the roller will squeeze the concrete and move downward, driving the placement plate to move downward, so that the connecting column drives the transmission spring to compress, and the connecting column drives the extrusion block to squeeze the rotating block, so that the rotating block drives the rotating rod to rotate, thereby driving the protective plate to rotate, so that the protective plate is used to block the front of the placement box.

[0008] According to the above technical solution, the inclined block is slidably installed on the front side of the placement box, a return spring is fixed to the bottom protrusion of the inclined block, and the side of the return spring away from the protrusion of the inclined block is fixed to the side wall of the placement box.

[0009] According to the above technical solution, a support block is fixed to the side wall of the placement box, the rotating shaft is rotatably installed on the side wall of the support block, the gear is fixed to the end point of the rotating shaft, the teeth are fixed to the top of the inclined block, and the protective side plate is fixed to the outer wall of the rotating shaft. When the protective plate rotates, the protective plate squeezes the inclined block, so that the inclined block drives the teeth to move and drives the gear to rotate, so that the gear can drive the rotating shaft and the protective side plate to rotate, so that the protective side plate can be flipped to cover the top of the placement box.

[0010] According to the above technical solution, the pushing device includes a fixed rod, a movable plate, an inclined groove, a connecting rod, a No. 1 calibration plate, a No. 2 calibration plate, an extrusion rod and a slide groove; the fixed rod is fixed to the inner wall of the placement box, the movable plate is slidably installed on the top of the placement plate, the bottom outer wall of the movable plate is in contact with the bottom inner wall of the placement box, and the inclined groove is provided on the movable plate. When the placement plate moves downward, it can drive the movable plate to move downward, causing the fixed rod to squeeze the inclined groove in the movable plate, so that the movable plate can drive the connecting rod to move, so that the two groups of No. 1 calibration plates on the placement plate are close to each other to calibrate the concrete.

[0011] According to the above technical solution, the calibration plate No. 1 is slidably installed on the top of the placing plate, and there are two groups of calibration plates No. 1, and the two groups of calibration plates No. 1 are symmetrically arranged with the center line of the placing plate in the vertical direction as the axis of symmetry, and the connecting rod is fixed on the side wall of the calibration plate No. 1, and the end of the connecting rod away from the calibration plate No. 1 is fixed on the top of the movable plate.

[0012] According to the above technical solution, the No. 2 calibration plate is slidably installed on the top of the placing plate, the extrusion rod is fixed on the inner side of the No. 1 calibration plate, a slide groove is provided on the No. 2 calibration plate, and the outer wall of the extrusion rod is in contact with the inner wall of the slide groove. When the No. 1 calibration plate moves, the extrusion rod in the No. 1 calibration plate can move in the slide groove provided on the No. 2 calibration plate, so that the two groups of No. 2 calibration plates on the placing plate can be brought close to each other, and the front and rear position of the concrete on the placing plate can be calibrated.

[0013] According to the above technical solution, the striking device includes a transmission plate, a ramp block, a guide block, a return spring, a bending block, a long plate and a knocking block; the transmission plate is fixed on the top of the connecting seat, the transmission plate passes through the top of the pressure block, and is slidably connected at the penetration point, and the side wall of the transmission plate is fixed with multiple groups of ramp blocks in a linear array.

[0014] According to the above technical solution, the guide block is slidably installed on the top of the pressure block, one side of the return spring is fixed on the side wall of the guide block, and the other side of the return spring is fixed on the inner side of the top of the pressure block. The bending block is fixed on the top of the guide block, and the end point of the bending block is a triangular slope. The long plate is fixed on the outer wall of the bending block, and the knocking block is fixed on the side wall of the long plate. The side of the knocking block away from the long plate is in contact with the side wall of the pressure block. When the placement plate moves to be in contact with the bottom of the inner wall of the placement box, when the pressure block continues to move downward for detection operation, the roller will move into the pressure block, so that the slope block can squeeze the triangular slope at the end of the bending block, thereby moving the bending block.

[0015] The present invention provides a magnesium phosphate cement-based concrete mechanical properties testing device, which has the following beneficial effects:

[0016] (1) The present invention sets a protective device. When the pressure block moves downward, the roller squeezes the concrete block and the placement plate downward, so that the connecting column drives the squeezing block to move downward. Through the cooperation of the rotating block and the rotating rod, the protective plate can be flipped over so that the protective plate can shield the front of the placement box to prevent the crushed stone from splashing onto the workers when the concrete block is crushed, thereby posing a safety risk to the workers. When the protective plate is flipped over, the edge of the protective plate squeezes the inclined block to move the inclined block. Through the cooperation of the teeth, gears and rotating shaft, the rotating shaft can drive the protective side plate to rotate so that the protective side plate shields the top of the placement box, thereby preventing the crushed stone from splashing out from the top of the placement box.

[0017] (2) The present invention sets a calibration device. When the placement plate moves downward, the fixed rod squeezes the inclined groove provided on the movable plate, thereby driving the two groups of movable plates in the placement box to approach each other. Through the cooperation of the connecting rod, the two groups of No. 1 calibration plates on the placement plate are brought close to each other, thereby pushing the left and right positions of the concrete blocks, so that the concrete blocks can be processed in the center; and when the two groups of No. 1 calibration plates move, through the cooperation of the squeezing rod and the sliding groove, the two groups of No. 2 calibration plates can be brought close to each other, and the front and rear positions of the concrete blocks on the placement plates can be adjusted, thereby achieving the function of calibrating the concrete blocks on the placement plates, preventing the concrete blocks from being not directly under the pressure block during the pressure operation by the pressure block, resulting in uneven force and affecting the detection results.

[0018] (3) The present invention provides a striking device. When the pressure block is reset upward and the roller is not subjected to the extrusion pressure, the transmission spring drives the moving seat to reset, thereby causing the transmission plate to move into the pressure block. Through the cooperation of the inclined block, the bending block, the long plate, the return spring and the striking block, the striking block strikes back and forth on the surface of the pressure block, thereby knocking off the hard impurities attached to the bottom of the pressure block. If hard impurities are attached to the bottom of the pressure block, the hard impurities will cause uneven contact between the pressure block and the concrete block during the next mechanical test, causing uneven force on the concrete block, which may lead to local stress concentration and affect the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the placement box of the present invention;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the placement box of the present invention;

[0022] Figure 4 It is a schematic diagram of the local structure of the placement box of the present invention;

[0023] Figure 5 It is a partial structural schematic diagram of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the placement box part of the present invention;

[0025] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure of A;

[0026] Figure 8 This is a schematic diagram of the pressure block structure of the present invention;

[0027] Fig. 9 It is a partial structural schematic diagram of the pressure block of the present invention.

[0028] In the figure: 1, workbench; 2, bracket; 3, drive motor; 4, threaded rod; 6, threaded plate; 7, pressure block; 8, placement box; 9, placement plate; 10, connecting column; 11, connecting spring; 12, fixed block; 13, rotating rod; 14, extrusion block; 15, rotating block; 16, protective plate; 17, inclined block; 18, return spring; 19, support block; 20, rotating shaft; 21, gear; 22, protective side plate; 23 , teeth; 24, transmission spring; 25, connecting seat; 26, roller; 271, fixed rod; 272, movable plate; 273, calibration plate No. 1; 274, connecting rod; 275, inclined groove; 276, calibration plate No. 2; 277, slide; 278, extrusion rod; 281, transmission plate; 282, inclined block; 283, guide block; 284, return spring; 285, bending block; 286, long plate; 287, knocking block. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0030] See also Figure 1-Figure 9An embodiment of the present invention is: a magnesium phosphate cement-based concrete mechanical property testing device, comprising a workbench 1, a bracket 2 is fixed on the top of the workbench 1, a driving motor 3 is fixed on the top of the bracket 2, a threaded rod 4 is fixed on the output end of the driving motor 3, the bottom of the threaded rod 4 is rotatably mounted on the top of the workbench 1, the outer wall of the threaded rod 4 is threadedly connected with a threaded plate 6, the threaded plate 6 is slidably mounted on the inner side of the bracket 2, a pressure block 7 is detachably mounted on the bottom of the threaded plate 6, a placement box 8 is fixed on the top of the workbench 1, and the inner part of the placement box 8 A placement plate 9 is slidably mounted on the wall, a connecting column 10 is fixed at the bottom of the placement plate 9, the connecting column 10 is slidably mounted on the bottom inner side of the placement box 8, a connecting spring 11 is fixed at the bottom of the connecting column 10, the bottom of the connecting spring 11 is fixed to the inner side of the placement box 8, a connecting seat 25 is slidably mounted on the inner wall of the pressure block 7, a roller 26 is rotatably mounted at the bottom of the connecting seat 25, a transmission spring 24 is fixed at the top of the connecting seat 25, the top of the transmission spring 24 is fixed to the inner side of the pressure block 7, and a protective device to prevent splashing is provided on the outer wall of the placement box 8 ; Wherein, the protective device includes an extrusion block 14, a fixed block 12, a rotating rod 13, a protective plate 16, a rotating block 15, a tilting block 17, a return spring 18, a tooth 23, a support block 19, a rotating shaft 20, a protective side plate 22 and a gear 21; the extrusion block 14 is fixed to the outer wall of the connecting column 10, the fixed block 12 is fixed to the front of the placement box 8, the rotating rod 13 is rotatably installed on the side wall of the fixed block 12, the protective plate 16 is fixed to the outer wall of the rotating rod 13, the rotating block 15 is fixed to the outer wall of the rotating rod 13, and the side wall of the protective plate 16 is fixed There is a torsion spring, and the side of the torsion spring away from the protective plate 16 is fixed to the side wall of the fixed block 12. The inclined block 17 is slidably installed on the front of the placement box 8. A return spring 18 is fixed to the bottom protrusion of the inclined block 17. The side of the return spring 18 away from the protrusion of the inclined block 17 is fixed to the side wall of the placement box 8. A support block 19 is fixed to the side wall of the placement box 8. The rotating shaft 20 is rotatably installed on the side wall of the support block 19. The gear 21 is fixed to the end point of the rotating shaft 20, the tooth 23 is fixed to the top of the inclined block 17, and the protective side plate 22 is fixed to the outer wall of the rotating shaft 20.

[0031] Because the elastic coefficient of the transmission spring 24 is five times that of the connecting spring 11, when the roller 26 squeezes the concrete block to move downward, the concrete block can drive the placement plate 9 to move downward, and the connecting column 10 to move downward, so that the squeezing block 14 can squeeze the top of the rotating block 15, and the rotating block 15 drives the rotating rod 13 to rotate, so that the rotating rod 13 can drive the protective plate 16 to shield and protect the front of the placement box 8, to prevent the crushing of the concrete block, causing gravel to splash onto the workers, posing a safety risk to the workers.

[0032] When the protective plate 16 is turned over to shield the front of the storage box 8, the protective plate 16 drives the torsion spring to be compressed, and when the rotating block 15 is not subjected to the extrusion force, the torsion spring can drive the protective plate 16 to expand and reset, so as to facilitate the cleaning of the storage box 8.

[0033] When the protective plate 16 is flipped, the edge of the protective plate 16 will squeeze the inclined block 17, so that the inclined block 17 can move. Through the cooperation of the teeth 23, the gear 21 and the rotating shaft 20, the rotating shaft 20 can drive the protective side plate 22 to rotate, so that the protective side plate 22 blocks the top of the storage box 8, thereby preventing gravel from splashing out from the top of the storage box 8.

[0034] When the present embodiment is working: when the device needs to be used, the device is placed at a position where the back is against the wall, and the concrete block to be tested is placed on the placement plate 9 of the placement box 8. By starting the driving motor 3, the threaded rod 4 is driven counterclockwise, so that the threaded rod 4 can drive the threaded plate 6 to move downward, and the threaded plate 6 drives the pressure block 7 to move downward. When the pressure block 7 moves downward to the roller 26 and contacts the concrete block on the placement plate 9, when the pressure block 7 continues to move downward, because the elastic coefficient of the transmission spring 24 is five times the elastic coefficient of the connecting spring 11, the roller 26 will squeeze the concrete block downward, and the connecting column 10 will move downward, squeezing the connecting spring 11 to compress. When the connecting column 10 moves downward, it can drive the squeezing block 14 to move downward, and the squeezing block 14 will press the rotating block 15. , thereby squeezing the top of the rotating block 15 to rotate counterclockwise, which can drive the rotating rod 13 and the protective plate 16 to rotate counterclockwise, so that the protective plate 16 drives the torsion spring to be compressed and deformed, and when the protective plate 16 rotates counterclockwise, the protective plate 16 can block and protect the front of the placement box 8; and when the protective plate 16 rotates counterclockwise to contact the inclined surface of the inclined block 17, the edge of the protective plate 16 will squeeze the inclined surface of the inclined block 17, driving the inclined block 17 to move outside the placement box 8, driving the reset spring 18 to stretch, and when the inclined block 17 moves, the teeth 23 will drive the gear 21 to rotate clockwise, so that the gear 21 drives the rotating shaft 20 and the protective side plate 22 to rotate clockwise, so that the protective side plate 22 blocks the top of the placement box 8.

[0035] When the detection is completed, the driving motor 3 drives the threaded rod 4 to rotate clockwise, so that the threaded plate 6 can move upward on the threaded rod 4, driving the pressure block 7 and the roller 26 to no longer squeeze the concrete block, so that the connecting spring 11 is no longer subjected to the squeezing force, because the connecting spring 11 is in a compressed state, so that the connecting spring 11 can drive the connecting column 10 to move upward, so that the connecting column 10 drives the squeezing block 14 not to squeeze the rotating block 15, because the torsion spring is in a compressed deformation state, the torsion spring can drive the protective plate 16 to rotate clockwise, so that the protective plate 16 is unfolded to expose the front of the placement box 8, thereby facilitating the cleaning of the concrete blocks in the placement box 8, and when the protective plate 16 is reset, the inclined surface of the inclined block 17 is not squeezed, because the reset spring 18 is in a stretched state, so that the reset spring 18 drives the inclined block 17 and the teeth 23 to reset, so that the teeth 23 drives the gear 21 to rotate counterclockwise, and the rotating shaft 20 drives the protective side plate 22 to rotate counterclockwise to reset.

[0036] See also Figure 1-Figure 9 On the basis of the above embodiment, in another embodiment of the present invention, a pushing device for calibrating the detection material is provided on the placement plate 9, and a striking device for striking the pressure block 7 is provided on the pressure block 7, and the pushing device includes a fixed rod 271, a movable plate 272, an inclined slot 275, a connecting rod 274, a first calibration plate 273, a second calibration plate 276, an extrusion rod 278 and a slide slot 277; the fixed rod 271 is fixed to the inner wall of the placement box 8, the movable plate 272 is slidably installed on the top of the placement plate 9, the bottom outer wall of the movable plate 272 is in contact with the bottom inner wall of the placement box 8, and the inclined slot 275 is provided on the movable plate 2 On 72, calibration plate No. 1 273 is slidably installed on the top of the placement plate 9, and two groups of calibration plates No. 1 273 are arranged, and the two groups of calibration plates No. 1 273 are symmetrically arranged with the center line of the placement plate 9 in the vertical direction as the symmetry axis, the connecting rod 274 is fixed on the side wall of calibration plate No. 1 273, and the end of the connecting rod 274 away from calibration plate No. 1 273 is fixed on the top of the movable plate 272, and calibration plate No. 2 276 is slidably installed on the top of the placement plate 9, and the extrusion rod 278 is fixed on the inner side of calibration plate No. 1 273, and a slide groove 277 is opened on calibration plate No. 2 276, and the outer wall of the extrusion rod 278 is in contact with the inner wall of the slide groove 277.

[0037] There are two groups of No. 1 calibration plates 273 on the placement plate 9, and the two groups of No. 1 calibration plates 273 are symmetrically arranged with the center line of the placement plate 9 in the vertical direction as the symmetry axis. When the placement plate 9 moves downward, the fixed rod 271 will squeeze the inclined groove 275 provided on the movable plate 272, so that the two groups of movable plates 272 in the placement box 8 can be driven to approach each other. Through the cooperation of the connecting rod 274, the two groups of No. 1 calibration plates 273 on the placement plate 9 are brought close to each other, so that the left and right positions of the concrete block can be pushed, so that the concrete block can be centered left and right.

[0038] There are two groups of No. 2 calibration plates 276 on the placement plate 9, and the two groups of No. 2 calibration plates 276 are symmetrically arranged with the center line of the placement plate 9 in the vertical direction as the axis of symmetry. Through the cooperation of the extrusion rod 278 and the slide groove 277, the two groups of No. 2 calibration plates 276 can be brought close to each other to adjust the front and rear positions of the concrete blocks on the placement plate 9, thereby calibrating the concrete blocks on the placement plate 9 to prevent the concrete blocks from being not directly under the pressure block 7 when the pressure operation is performed through the pressure block 7, resulting in uneven force and affecting the detection results.

[0039] The striking device includes a transmission plate 281, an inclined block 282, a guide block 283, a return spring 284, a bending block 285, a long plate 286 and a knocking block 287; the transmission plate 281 is fixed to the top of the connecting seat 25, the transmission plate 281 passes through the top of the pressure block 7, and is slidably connected at the penetration point, the side wall of the transmission plate 281 is fixed with multiple groups of inclined blocks 282 in a linear array, the guide block 283 is slidably installed on the top of the pressure block 7, one side of the return spring 284 is fixed to the side wall of the guide block 283, and the other side of the return spring 284 is fixed to the inner side of the top of the pressure block 7, the bending block 285 is fixed to the top of the guide block 283, the end point of the bending block 285 is a triangular inclined surface, the long plate 286 is fixed to the outer wall of the bending block 285, the knocking block 287 is fixed to the side wall of the long plate 286, and the side of the knocking block 287 away from the long plate 286 is in contact with the side wall of the pressure block 7.

[0040] When the pressure block 7 is reset upward and the roller 26 is not subjected to the extrusion pressure, the transmission spring 24 will drive the connecting seat 25 to reset, so that the transmission plate 281 moves into the pressure block 7. Through the cooperation of the inclined block 282, the bending block 285, the long plate 286, the return spring 284 and the knocking block 287, the knocking block 287 knocks back and forth on the surface of the pressure block 7, so that the hard impurities attached to the bottom of the pressure block 7 can be knocked off. If hard impurities are attached to the bottom of the pressure block 7, the hard impurities will cause uneven contact between the pressure block 7 and the concrete block during the next mechanical test, causing uneven force on the concrete block, which may lead to local stress concentration and affect the accuracy of the test results.

[0041] When the present embodiment is working, when the placing plate 9 moves downward, the inclined groove 275 of the movable plate 272 will move on the fixed rod 271, so that the inclined groove 275 will be squeezed by the fixed rod 271, so that the two groups of movable plates 272 at the bottom of the placing plate 9 can approach each other, so that the movable plate 272 drives the connecting rod 274 to move, so that the two groups of No. 1 calibration plates 273 on the placing plate 9 are close to each other, and the offset concrete block is squeezed and pushed, and the left and right positions of the concrete block are calibrated. When the two groups of No. 1 calibration plates 273 are close to each other, the squeezing rod 278 can squeeze the sliding groove 277 of the No. 2 calibration plate 276, and the sliding groove 277 of the No. 2 calibration plate 276 is an oblique hole, so that the squeezing rod 278 can squeeze the sliding groove 277 of the No. 2 calibration plate 276. The pressure rod 278 squeezes the two groups of No. 2 calibration plates 276 on the placement plate 9 to move closer to each other, and calibrates the concrete block that is offset in the front and rear positions, so that the concrete block can be tested directly under the pressure block 7; and when the placement plate 9 is not subjected to the squeezing force, the connecting column 10 and the placement plate 9 are driven to move upward by the connecting spring 11, and when the movable plate 272 moves upward, the inclined groove 275 can squeeze the fixed rod 271, so that the two groups of movable plates 272 are squeezed away from each other, and the connecting rod 274 drives the two groups of No. 1 calibration plates 273 away from each other, and when the two groups of No. 1 calibration plates 273 are reset, the squeezing rod 278 squeezes the slide groove 277, driving the two groups of No. 2 calibration plates 276 to reset and perform the next calibration operation;

[0042] When the pressure block 7 finishes the pressure operation and drives the roller 26 upward without being squeezed, the transmission spring 24 is in a compressed state, which causes the connecting seat 25 to move downward in the pressure block 7, thereby driving the transmission plate 281 to move downward, so that the inclined surface block 282 on the transmission plate 281 squeezes the triangular inclined surface of the end point of the bending block 285, and the bending block 285 moves away from the transmission plate 281 under the squeezing force, so that the guide block 283 drives the return spring 284 to stretch, and When the bending block 285 moves, the long plate 286 will move away from the pressure block 7, driving the knocking block 287 away from the pressure block 7. When the inclined plane block 282 moves and does not squeeze the triangular inclined plane at the end point of the bending block 285, because the return spring 284 is in a stretched state, the guide block 283 can drive the bending block 285 and the long plate 286 to reset, so that the knocking block 287 knocks back and forth on the outer wall of the pressure block 7, knocking off the hard impurities attached to the bottom of the pressure block 7.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A magnesium phosphate cement-based concrete mechanical properties testing device, comprising a workbench (1), characterized in that: A bracket (2) is fixed on the top of the workbench (1), a driving motor (3) is fixed on the top of the bracket (2), a threaded rod (4) is fixed on the output end of the driving motor (3), the bottom of the threaded rod (4) is rotatably mounted on the top of the workbench (1), the outer wall of the threaded rod (4) is threadedly connected with a threaded plate (6), the threaded plate (6) is slidably mounted on the inner side of the bracket (2), a pressure block (7) is detachably mounted on the bottom of the threaded plate (6), a placement box (8) is fixed on the top of the workbench (1), a placement plate (9) is slidably mounted on the inner wall of the placement box (8), and a connecting column (10) is fixed on the bottom of the placement plate (9). A connecting spring (11) is fixed to the bottom of the connecting column (10), and the bottom of the connecting spring (11) is fixed to the inner side of the placement box (8). A connecting seat (25) is slidably mounted on the inner wall of the pressure block (7), and a roller (26) is rotatably mounted on the bottom of the connecting seat (25). A transmission spring (24) is fixed to the top of the connecting seat (25), and the top of the transmission spring (24) is fixed to the inner side of the pressure block (7). The outer wall of the placement box (8) is provided with a protective device to prevent splashing. A pushing device for calibrating the detection material is provided on the placement plate (9), and a striking device for knocking the pressure block (7) is provided on the pressure block (7). The protective device comprises an extrusion block (14), a fixed block (12), a rotating rod (13), a protective plate (16), a rotating block (15), an inclined block (17), a return spring (18), teeth (23), a support block (19), a rotating shaft (20), a protective side plate (22) and a gear (21); the extrusion block (14) is fixed to the outer wall of the connecting column (10), the fixed block (12) is fixed to the front of the placement box (8), the rotating rod (13) is rotatably mounted on the side wall of the fixed block (12), the protective plate (16) is fixed to the outer wall of the rotating rod (13), the rotating block (15) is fixed to the outer wall of the rotating rod (13), and the side wall of the protective plate (16) is fixed with a torsion spring, and the side of the torsion spring away from the protective plate (16) is fixed to the side wall of the fixed block (12).

2. A magnesium phosphate cement-based concrete mechanical properties testing device according to claim 1, characterized in that: The inclined block (17) is slidably mounted on the front side of the placement box (8); a return spring (18) is fixed to the protruding portion of the bottom of the inclined block (17); and the return spring (18) is fixed to the side wall of the placement box (8) at a side away from the protruding portion of the inclined block (17).

3. A magnesium phosphate cement-based concrete mechanical properties testing device according to claim 2, characterized in that: A support block (19) is fixed to the side wall of the placement box (8), the rotating shaft (20) is rotatably mounted on the side wall of the supporting block (19), the gear (21) is fixed to the end point of the rotating shaft (20), the teeth (23) are fixed to the top of the inclined block (17), and the protective side plate (22) is fixed to the outer wall of the rotating shaft (20).

4. A magnesium phosphate cement-based concrete mechanical properties testing device according to claim 1, characterized in that: The pushing device comprises a fixed rod (271), a movable plate (272), an inclined groove (275), a connecting rod (274), a first calibration plate (273), a second calibration plate (276), an extrusion rod (278) and a slide groove (277); the fixed rod (271) is fixed to the inner wall of the placement box (8), the movable plate (272) is slidably installed on the top of the placement plate (9), the bottom outer wall of the movable plate (272) is in contact with the bottom inner wall of the placement box (8), and the inclined groove (275) is provided on the movable plate (272).

5. A magnesium phosphate cement-based concrete mechanical properties testing device according to claim 4, characterized in that: The No. 1 calibration plate (273) is slidably mounted on the top of the placement plate (9), and two groups of the No. 1 calibration plates (273) are provided, and the two groups of No. 1 calibration plates (273) are symmetrically arranged with the center line of the placement plate (9) in the vertical direction as the symmetry axis, and the connecting rod (274) is fixed to the side wall of the No. 1 calibration plate (273), and one end of the connecting rod (274) away from the No. 1 calibration plate (273) is fixed to the top of the movable plate (272).

6. A magnesium phosphate cement-based concrete mechanical properties testing device according to claim 5, characterized in that: The second calibration plate (276) is slidably installed on the top of the placement plate (9), the extrusion rod (278) is fixed on the inner side of the first calibration plate (273), and a slide groove (277) is provided on the second calibration plate (276), and the outer wall of the extrusion rod (278) is in contact with the inner wall of the slide groove (277).

7. A magnesium phosphate cement-based concrete mechanical properties testing device according to claim 1, characterized in that: The striking device comprises a transmission plate (281), an inclined surface block (282), a guide block (283), a return spring (284), a bending block (285), a long plate (286) and a striking block (287); the transmission plate (281) is fixed on the top of the connecting seat (25), the transmission plate (281) passes through the top of the pressure block (7), and is slidably connected at the penetration point, and the side wall of the transmission plate (281) is fixed with multiple groups of inclined surface blocks (282) in a linear array.

8. A magnesium phosphate cement-based concrete mechanical properties testing device according to claim 7, characterized in that: The guide block (283) is slidably mounted on the top of the pressure block (7), one side of the return spring (284) is fixed on the side wall of the guide block (283), and the other side of the return spring (284) is fixed on the inner side of the top of the pressure block (7), the bending block (285) is fixed on the top of the guide block (283), and the end point of the bending block (285) is a triangular inclined surface. The long plate (286) is fixed on the outer wall of the bending block (285), and the knocking block (287) is fixed on the side wall of the long plate (286), and the side of the knocking block (287 away from the long plate (286) is in contact with the side wall of the pressure block (7).

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