Testing device for research on mechanical properties of fiber nano metakaolin recycled concrete

Abstract

The invention relates to the technical field of concrete testing, in particular to a testing device for fiber nano metakaolin recycled concrete mechanical property research, which comprises a base, a fixed supporting table, a concrete test block, a sliding frame, an adjusting box, a rotating frame, a hydraulic assembly, a transmission box, a control table, a rotating mechanism, a locking mechanism and an adjusting mechanism. Rotation of the hydraulic assembly is achieved through the rotating mechanism, part of the device can adjust the pressure applying direction of the hydraulic assembly, a concrete test block can be conveniently subjected to a compression resistance or bending strength test, locking of the rotating frame is achieved through the locking mechanism, part of the device can stably support the hydraulic assembly in different states, and the test efficiency is improved. The adjustment of the sliding frames is realized through the adjusting mechanism, so that part of the device can adjust the distance between the sliding frames according to the specification of the concrete test block, and the functionality, the stability and the adjustability of the device are improved.

Description

Technical Field

[0001] The invention relates to the technical field of concrete testing, in particular to a testing device for studying the mechanical properties of fiber nano-metakaolin recycled concrete. Background Art

[0002] With the acceleration of urbanization, the demolition of a large number of old buildings has generated a large amount of construction waste, of which waste concrete accounts for a large proportion. Processing waste concrete into recycled aggregate for the preparation of recycled concrete is an effective way to realize the resource utilization of construction waste and is in line with the concept of sustainable development. Metakaolin is a material with volcanic ash activity formed by high-temperature calcination of kaolin. Nano-metakaolin has a smaller particle size and a larger specific surface area, so it has a higher volcanic ash activity. Applying nano-metakaolin to recycled concrete can effectively utilize kaolin mineral resources and related industrial waste and improve resource utilization.

[0003] In actual engineering, the safety and reliability of concrete structures are of vital importance. Through in-depth research and precise testing of the mechanical properties of fiber nano-metakaolin recycled concrete, accurate material performance parameters can be provided for engineering design and construction, ensuring engineering quality and reducing engineering risks. Promoting the development of fiber nano-metakaolin recycled concrete technology will help promote technological innovation and upgrading in the building materials industry, improve my country's technical level in the field of green high-performance concrete, and enhance the industry's international competitiveness.

[0004] The existing device mainly tests and studies the mechanical properties of concrete test blocks through hydraulic components. The existing technology is similar to a concrete performance test experimental device. The structure with publication number CN111351698B includes a pressure sensor and a base. A first groove is provided on the top of the base. A fixed seat is fixedly installed at the bottom of the first groove. A sliding sleeve is slidably installed on the fixed seat. A circular hole is provided on the sliding sleeve. A round rod is rotatably installed in the circular hole. A fixed block is fixedly installed at one end of the round rod. A pad is fixedly installed on the top of the fixed block. The invention can quickly pour out the broken concrete for the test and suck the dust generated by the broken concrete into the water. However, there are still areas that can be optimized in the device.

[0005] The existing device mainly fixes the hydraulic component on the support frame, which makes it difficult for some devices to adjust the pressure direction of the hydraulic component, making it inconvenient to test the compressive or bending strength of the concrete test block. Secondly, it is difficult for some devices to lock the hydraulic component in a vertical or horizontal state, which makes it difficult for some devices to stably support the running hydraulic component. Finally, it is difficult for some devices to adjust the spacing of the sliding frame according to the specifications of the concrete test block, which makes it inconvenient for the hydraulic component to perform pressure testing on the concrete test block, reducing the working efficiency and practicality of the device. Therefore, in order to solve the above problems, a test device for studying the mechanical properties of fiber nano-metakaolin recycled concrete is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a testing device for studying the mechanical properties of fiber nano-metakaolin recycled concrete, so as to solve the problem that the existing devices in the prior art mentioned in the above background technology mainly fix the hydraulic component on the support frame, making it difficult for some devices to adjust the pressure direction of the hydraulic component, thereby making it inconvenient to perform compressive or flexural strength tests on concrete test blocks; secondly, it is difficult for some devices to lock the hydraulic components in a vertical or horizontal state, thereby making it difficult for some devices to stably support the running hydraulic components; finally, it is difficult for some devices to adjust the spacing of the sliding frame according to the specifications of the concrete test blocks, thereby making it inconvenient for the hydraulic components to perform pressure tests on the concrete test blocks.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a testing device for studying the mechanical properties of fiber nano-metakaolin recycled concrete, comprising a base, characterized in that: a fixed support is fixedly connected to the middle of the bottom inside the base, a concrete test block is placed on the top of the fixed support, sliding frames are slidably connected to the two sides of the bottom inside the base, an adjustment box is fixedly connected to the right side of the base, a rotating frame is movably connected to the upper part of the inner wall of the sliding frame, a hydraulic component is fixedly connected to the inner wall of the top plate of the rotating frame, a transmission box is fixedly connected to the front side of the sliding frame, and a control console is fixedly connected to the left side of the base; A rotating mechanism is provided inside the transmission box, and the rotating mechanism includes a first motor, the bottom of the first motor is fixedly connected to the middle of the top of the transmission box, the middle of the bottom of the first motor is fixedly connected to a transmission shaft, the bottom end of the transmission shaft passes through the transmission box and is fixedly connected to a first bevel gear, the lower part of the first bevel gear is meshedly connected to a second bevel gear, the inner wall of the second bevel gear is fixedly connected to a transmission worm, and the two ends of the transmission worm are movably connected to both sides of the inner wall of the transmission box; A locking mechanism is provided inside the sliding frame, and the locking mechanism includes a limit frame, the front side of the limit frame is fixedly connected to the front side of the inner wall of the sliding frame, the outer wall of the transmission worm is meshedly connected with a linkage worm wheel on the side away from the fixed support, the inner wall of the linkage worm wheel is fixedly connected with a linkage shaft, the front end of the linkage shaft is movably connected to the front side of the inner wall of the transmission box, the rear end of the linkage shaft passes through the front side wall of the sliding frame and is fixedly connected with a half gear, an adjustment mechanism is provided inside the adjustment box, and the adjustment mechanism includes a second motor, and the bottom of the second motor is fixedly connected to the middle of the top of the adjustment box.

[0008] Preferably, a transmission worm wheel is meshingly connected to the outer wall of the transmission worm near the fixed support, a driving shaft is fixedly connected to the inner wall of the transmission worm wheel, and a front end of the driving shaft is movably connected to the front side of the inner wall of the transmission box.

[0009] Preferably, the rear end of the driving shaft passes through the front side wall of the sliding frame and is fixedly connected to a main gear, the rear side of the outer wall of the main gear is meshedly connected to an internal gear, and the rear side of the internal gear is fixedly connected to a rotating disk.

[0010] Preferably, a rotating shaft is fixedly connected to the inner wall of the rotating disk, a front end of the rotating shaft is movably connected to the front side of the inner wall of the sliding frame, and a rear end of the rotating shaft is fixedly connected to the lower front side of the rotating frame.

[0011] Preferably, a pair of rack plates are meshingly connected on both sides of the outer wall of the half gear, a push frame is fixedly connected to the outer wall of the rack plate, and the outer wall of the push frame is slidably connected to the inner wall of the limit frame.

[0012] Preferably, a latch is fixedly connected to one side of the push frame close to the rotating shaft, an outer wall of the rotating shaft is located at the rear side of the rotating disk and is fixedly connected to a chuck, and a slot corresponding to the latch is provided on the outer side of the chuck.

[0013] Preferably, a movable shaft is fixedly connected to the middle of the bottom of the second motor, and the bottom of the movable shaft passes through the adjustment box and is fixedly connected to the third bevel gear.

[0014] Preferably, a fourth bevel gear is meshingly connected below the third bevel gear, a movable worm is fixedly connected to the inner wall of the fourth bevel gear, and two ends of the movable worm are movably connected to both sides of the inner wall of the adjustment box.

[0015] Preferably, both sides of the outer wall of the movable worm are meshingly connected with movable worm wheels, the inner wall of the movable worm wheel is fixedly connected with a movable screw, and the right end of the movable screw is movably connected to the right side of the inner wall of the adjustment box.

[0016] Preferably, the left end of the movable screw passes through the right side wall of the base and is movably connected to the left side of the inner wall of the base, and the outer wall of the movable screw is threadedly connected with adjusting screw sleeves on both sides, and the outer wall of the adjusting screw sleeve is fixedly connected to the front and rear sides of the sliding frame.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uses the first motor, transmission shaft, first bevel gear, second bevel gear, transmission worm, transmission worm wheel, drive shaft, main gear, internal gear, rotating disk and rotating shaft in the rotating mechanism. The first motor is started through the console to drive the transmission shaft and the first bevel gear to rotate in a limited position, the first bevel gear is engaged to drive the second bevel gear and transmission worm to rotate in a limited position, the transmission worm is engaged to drive the transmission worm wheel, drive shaft and main gear to rotate in a limited position, the main gear is engaged to drive the internal gear, rotating disk, rotating shaft, rotating frame and hydraulic assembly to rotate in a limited position, thereby realizing the rotation of the hydraulic assembly. Some devices can adjust the pressure direction of the hydraulic assembly, which is convenient for testing the compressive or bending strength of concrete test blocks, and improves the functionality and practicality of the device.

[0018] 2. The present invention uses the structures of the linkage worm gear, linkage shaft, half gear, rack plate, push frame, limit frame, latch and chuck in the locking mechanism, and drives the linkage worm gear, linkage shaft and half gear to limit rotation through the meshing of the transmission worm. The meshing of the half gear drives a pair of rack plates and the push frame to slide back and forth inside the limit frame. The push frame drives the latch to insert or disengage from the slot of the chuck, thereby realizing the locking of the rotating frame. This allows some devices to lock the hydraulic components in a vertical or horizontal state, so that the locking mechanism can stably support the hydraulic components, thereby improving the stability and practicality of the device.

[0019] 3. The present invention uses the second motor, movable shaft, third bevel gear, fourth bevel gear, movable worm, movable worm wheel, movable screw and adjusting screw sleeve structures in the adjustment mechanism. The second motor is started through the console to drive the movable shaft and the third bevel gear to limit rotation. The meshing of the third bevel gear drives the fourth bevel gear and the movable worm to limit rotation. The meshing of the movable worm drives the movable worm wheel and the movable screw to limit rotation. The movable screw drives the adjusting screw sleeve and the sliding frame to slide symmetrically, thereby realizing the adjustment of the sliding frame, so that some devices can adjust the spacing of the sliding frames according to the specifications of the concrete test blocks, which is convenient for the hydraulic assembly to perform pressure testing on the concrete test blocks, thereby improving the adjustability and practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front side perspective view of the structure of the present invention; Figure 2 It is a front cross-sectional perspective view of the structure of the present invention; Figure 3 It is a front cross-sectional perspective view of the local structure of the transmission box and the rotating mechanism of the present invention; Figure 4 It is a right side sectional perspective view of the partial structure of the transmission box and the rotating mechanism of the present invention; Figure 5 It is a left side sectional perspective view of the partial structure of the transmission box and the locking mechanism of the present invention; Figure 6 It is a rear cross-sectional perspective view of a local structure of the locking mechanism of the present invention; Figure 7 It is a right side sectional stereoscopic view of the partial structure of the regulating box and the regulating mechanism of the present invention; Figure 8 It is a front cross-sectional stereoscopic view of the local structure of the base and the adjustment mechanism of the present invention.

[0021] In the figure: 101, base; 102, fixed support platform; 103, concrete test block; 104, sliding frame; 105, adjustment box; 106, rotating frame; 107, hydraulic assembly; 108, transmission box; 109, control console; 2, rotating mechanism; 201, first motor; 202, transmission shaft; 203, first bevel gear; 204, second bevel gear; 205, transmission worm; 206, transmission worm wheel; 207, driving shaft; 208, main gear; 209, internal gear; 2 10. Rotating disk; 211. Rotating shaft; 3. Locking mechanism; 301. Linked worm gear; 302. Linked shaft; 303. Half gear; 304. Rack plate; 305. Push frame; 306. Limit frame; 307. Latch; 308. Chuck; 4. Adjusting mechanism; 401. Second motor; 402. Active shaft; 403. Third bevel gear; 404. Fourth bevel gear; 405. Active worm; 406. Active worm gear; 407. Active screw; 408. Adjusting screw sleeve. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figure 1-8 , an embodiment provided by the present invention: A testing device for studying the mechanical properties of fiber nano-metakaolin recycled concrete comprises a base 101, a fixed support 102 is fixedly connected to the middle of the bottom inside the base 101, a concrete test block 103 is placed on the top of the fixed support 102, sliding frames 104 are slidably connected to both sides of the bottom inside the base 101, an adjustment box 105 is fixedly connected to the right side of the base 101, a rotating frame 106 is movably connected to the upper part of the inner wall of the sliding frame 104, a hydraulic assembly 107 is fixedly connected to the inner wall of the top plate of the rotating frame 106, a transmission box 108 is fixedly connected to the front side of the sliding frame 104, and a control console 109 is fixedly connected to the left side of the base 101; A rotating mechanism 2 is provided inside the transmission box 108, and the rotating mechanism 2 includes a first motor 201, the bottom of the first motor 201 is fixedly connected to the top middle of the transmission box 108, and a transmission shaft 202 is fixedly connected to the bottom middle of the first motor 201. The bottom end of the transmission shaft 202 passes through the transmission box 108 and is fixedly connected to a first bevel gear 203, and a second bevel gear 204 is meshedly connected to the bottom of the first bevel gear 203, and a transmission worm 205 is fixedly connected to the inner wall of the second bevel gear 204, and both ends of the transmission worm 205 are movably connected to the inner wall of the transmission box 108. The two ends of the transmission worm 205 are movably connected to the inner wall of the transmission box 108. Through this design, the first motor 201 drives the transmission shaft 202 and the first bevel gear 203 to rotate in a limited position, so that the first bevel gear 203 meshes to drive the second bevel gear 204 and the transmission worm 205 to rotate in a limited position, and the outer wall of the transmission worm 205 is meshedly connected to a side of the fixed support platform 102 with a transmission worm wheel 206, and the inner wall of the transmission worm wheel 206 The wall is fixedly connected with a drive shaft 207, the front end of the drive shaft 207 is movably connected to the front side of the inner wall of the transmission box 108, the rear end of the drive shaft 207 passes through the front side wall of the sliding frame 104 and is fixedly connected with a main gear 208. Through this design, the transmission worm 205 is meshed to drive the transmission worm wheel 206 to drive the drive shaft 207 and the main gear 208 to rotate in a limited position, the rear side of the outer wall of the main gear 208 is meshed with an internal gear 209, and the rear side of the internal gear 209 is fixedly connected with a rotating Disk 210, the inner wall of the rotating disk 210 is fixedly connected with a rotating shaft 211, the front end of the rotating shaft 211 is movably connected to the front side of the inner wall of the sliding frame 104, and the rear end of the rotating shaft 211 is fixedly connected to the front side and lower part of the rotating frame 106. Through this design, the main gear 208 is engaged to drive the internal gear 209, the rotating disk 210, the rotating shaft 211 and the rotating frame 106 to rotate in a limited position, so that the rotating shaft 211 drives the rotating frame 106 and the hydraulic component 107 to rotate in a limited position.

[0024] The interior of the sliding frame 104 is provided with a locking mechanism 3, which includes a limit frame 306, the front side of the limit frame 306 is fixedly connected to the front side of the inner wall of the sliding frame 104, the outer wall of the transmission worm 205 is meshedly connected with a linkage worm wheel 301 on the side away from the fixed support platform 102, the inner wall of the linkage worm wheel 301 is fixedly connected with a linkage shaft 302, the front end of the linkage shaft 302 is movably connected to the front side of the inner wall of the transmission box 108, and the rear end of the linkage shaft 302 passes through the front side wall of the sliding frame 104 and is fixedly connected with a half gear 303. Through this design, the transmission worm 205 is meshed to drive the linkage worm wheel 301, the linkage shaft 302 and the half gear 303 to rotate in a limited position, so that the rotating mechanism 2 can be linked to the locking mechanism 3, and the half gear 303 can be rotated. A pair of rack plates 304 are meshed and connected on both sides of the outer wall of the gear 303, and a push frame 305 is fixedly connected to the outer wall of the rack plate 304. The outer wall of the push frame 305 is slidably connected to the inner wall of the limit frame 306. Through this design, the meshing of the half gear 303 drives the pair of rack plates 304 and the push frame 305 to slide back and forth inside the limit frame 306. The push frame 305 is fixedly connected to a latch 307 on the side close to the rotating shaft 211. The outer wall of the rotating shaft 211 is located on the rear side of the rotating disk 210 and is fixedly connected to a chuck 308. A slot corresponding to the latch 307 is opened on the outer side of the chuck 308. Through this design, the push frame 305 drives the latch 307 to be inserted into or detached from the slot of the chuck 308.

[0025] An adjusting mechanism 4 is provided inside the adjusting box 105, and the adjusting mechanism 4 includes a second motor 401, the bottom of the second motor 401 is fixedly connected to the middle of the top of the adjusting box 105, and a movable shaft 402 is fixedly connected to the middle of the bottom of the second motor 401, and the bottom of the movable shaft 402 passes through the adjusting box 105 and is fixedly connected to a third bevel gear 403, and a fourth bevel gear 404 is meshedly connected to the bottom of the third bevel gear 403, and a movable worm 405 is fixedly connected to the inner wall of the fourth bevel gear 404, and both ends of the movable worm 405 are movably connected to both sides of the inner wall of the adjusting box 105. Through this design, the second motor 401 drives the movable shaft 402 and the third bevel gear 403 to rotate synchronously, so that the third bevel gear 403 meshes and drives the fourth bevel gear 404 and the movable worm 405 to rotate in a limited position, and the movable The movable worm gear 406 is meshedly connected to the outer wall of the movable worm gear 405, and the inner wall of the movable worm gear 406 is fixedly connected to the movable screw 407. The right end of the movable screw 407 is movably connected to the right side of the inner wall of the adjusting box 105. Through this design, the movable worm gear 405 is meshed to drive the movable worm gear 406 and the movable screw 407 to rotate in a limited manner. The left end of the movable screw 407 passes through the right side wall of the base 101 and is movably connected to the left side of the inner wall of the base 101. The outer wall of the movable screw 407 is threadedly connected to the adjusting screw sleeve 408 on both sides, and the outer wall of the adjusting screw sleeve 408 is fixedly connected to the front and rear sides of the sliding frame 104. Through this design, the movable screw 407 drives the adjusting screw sleeve 408 and the sliding frame 104 to slide symmetrically, so that the spacing of the sliding frame 104 can be adjusted according to the specifications of the concrete test block 103.

[0026] Working principle: when the hydraulic assembly 107 needs to be rotated, the first motor 201 is first started through the control console 109, the first motor 201 drives the transmission shaft 202 to limit the rotation, the transmission shaft 202 drives the first bevel gear 203 to rotate synchronously, the first bevel gear 203 engages to drive the second bevel gear 204 to rotate, the second bevel gear 204 drives the transmission worm 205 to limit the rotation, the transmission worm 205 engages to drive the transmission worm wheel 206 to rotate synchronously, the transmission worm wheel 206 drives the drive shaft 207 to limit the rotation, the drive shaft 207 drives the main gear 208 to rotate synchronously, the main gear 208 engages to drive the internal gear 209 to rotate, the internal gear 209 drives the rotating disk 210 to rotate synchronously, the rotating disk 210 drives the rotating shaft 211 to limit the rotation, the rotating shaft 211 drives the rotating frame 106 and the hydraulic assembly 107 to rotate synchronously, thereby realizing the rotation operation of the hydraulic assembly 107.

[0027] When it is necessary to lock the rotating frame 106, the transmission worm 205 is first engaged to drive the linkage worm wheel 301 to rotate, and the linkage worm wheel 301 drives the linkage shaft 302 to rotate within a limited position, and the linkage shaft 302 drives the half gear 303 to rotate synchronously, and the half gear 303 engages to drive a pair of rack plates 304 to slide back and forth left and right, and the rack plates 304 drive the push frame 305 to slide within the limited position of the limit frame 306, and the push frame 305 drives the latch 307 to be inserted into or disengaged from the slot of the chuck 308, thereby realizing the locking operation of the rotating frame 106.

[0028] When the sliding frame 104 needs to be adjusted, first start the second motor 401 through the control console 109, the second motor 401 drives the movable shaft 402 to limit the rotation, the movable shaft 402 drives the third bevel gear 403 to rotate synchronously, the third bevel gear 403 engages to drive the fourth bevel gear 404 to rotate, the fourth bevel gear 404 drives the movable worm 405 to limit the rotation, the movable worm 405 engages to drive the movable worm wheel 406 to rotate synchronously, the movable worm wheel 406 drives the movable screw 407 to limit the rotation, the movable screw 407 drives the adjusting screw sleeve 408 to slide symmetrically, the adjusting screw sleeve 408 drives the sliding frame 104 to limit the rotation, the adjustment operation of the sliding frame 104 is realized, and the operation ends here.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A testing device for studying the mechanical properties of fiber nano-metakaolin recycled concrete, comprising a base (101), characterized in that: A fixed support platform (102) is fixedly connected to the middle of the bottom of the base (101), a concrete test block (103) is placed on the top of the fixed support platform (102), sliding frames (104) are slidably connected to both sides of the bottom of the base (101), an adjustment box (105) is fixedly connected to the right side of the base (101), a rotating frame (106) is movably connected to the top of the inner wall of the sliding frame (104), a hydraulic component (107) is fixedly connected to the inner wall of the top plate of the rotating frame (106), a transmission box (108) is fixedly connected to the front side of the sliding frame (104), and a control console (109) is fixedly connected to the left side of the base (101); A rotating mechanism (2) is provided inside the transmission box (108), and the rotating mechanism (2) comprises a first motor (201), the bottom of the first motor (201) is fixedly connected to the middle of the top of the transmission box (108), a transmission shaft (202) is fixedly connected to the middle of the bottom of the first motor (201), the bottom end of the transmission shaft (202) passes through the transmission box (108) and is fixedly connected to a first bevel gear (203), a second bevel gear (204) is meshingly connected below the first bevel gear (203), a transmission worm (205) is fixedly connected to the inner wall of the second bevel gear (204), and two ends of the transmission worm (205) are movably connected to two sides of the inner wall of the transmission box (108); A locking mechanism (3) is provided inside the sliding frame (104), the locking mechanism (3) comprising a limit frame (306), the front side of the limit frame (306) being fixedly connected to the front side of the inner wall of the sliding frame (104), a side of the outer wall of the transmission worm (205) away from the fixed support platform (102) being meshingly connected to a linkage worm wheel (301), the inner wall of the linkage worm wheel (301) being fixedly connected to a linkage shaft (302), the front end of the linkage shaft (302) being movably connected to the front side of the inner wall of the transmission box (108), the rear end of the linkage shaft (302) passing through the front side wall of the sliding frame (104) and being fixedly connected to a half gear (303), and an adjustment mechanism (4) is provided inside the adjustment box (105), the adjustment mechanism (4) comprising a second motor (401), the bottom of the second motor (401) being fixedly connected to the middle of the top of the adjustment box (105).

2. The testing device for studying the mechanical properties of fiber nano-metakaolin recycled concrete according to claim 1, characterized in that: A transmission worm wheel (206) is meshingly connected to a side of the outer wall of the transmission worm (205) close to the fixed support platform (102), a driving shaft (207) is fixedly connected to the inner wall of the transmission worm wheel (206), and a front end of the driving shaft (207) is movably connected to the front side of the inner wall of the transmission box (108).

3. The testing device for studying the mechanical properties of fiber nano-metakaolin recycled concrete according to claim 2, characterized in that: The rear end of the driving shaft (207) passes through the front side wall of the sliding frame (104) and is fixedly connected to a main gear (208); the rear side of the outer wall of the main gear (208) is meshedly connected to an internal gear (209); and the rear side of the internal gear (209) is fixedly connected to a rotating disk (210).

4. The testing device for studying the mechanical properties of fiber nano-metakaolin recycled concrete according to claim 3, characterized in that: A rotating shaft (211) is fixedly connected to the inner wall of the rotating disk (210), the front end of the rotating shaft (211) is movably connected to the front side of the inner wall of the sliding frame (104), and the rear end of the rotating shaft (211) is fixedly connected to the lower front side of the rotating frame (106).

5. The testing device for studying the mechanical properties of fiber nano-metakaolin recycled concrete according to claim 1, characterized in that: A pair of rack plates (304) are meshingly connected on both sides of the outer wall of the half gear (303), a push frame (305) is fixedly connected to the outer wall of the rack plate (304), and the outer wall of the push frame (305) is slidably connected to the inner wall of the limit frame (306).

6. The testing device for studying the mechanical properties of fiber nano-metakaolin recycled concrete according to claim 5, characterized in that: A latch pin (307) is fixedly connected to one side of the push frame (305) close to the rotating shaft (211); an outer wall of the rotating shaft (211) is located at the rear side of the rotating disk (210) and is fixedly connected to a chuck (308); a slot corresponding to the latch pin (307) is provided on the outer side of the chuck (308).

7. The testing device for studying the mechanical properties of fiber nano-metakaolin recycled concrete according to claim 1, characterized in that: A movable shaft (402) is fixedly connected to the middle of the bottom of the second motor (401), and the bottom of the movable shaft (402) passes through the adjustment box (105) and is fixedly connected to a third bevel gear (403).

8. The testing device for studying the mechanical properties of fiber nano-metakaolin recycled concrete according to claim 7, characterized in that: A fourth bevel gear (404) is meshingly connected below the third bevel gear (403), a movable worm (405) is fixedly connected to the inner wall of the fourth bevel gear (404), and two ends of the movable worm (405) are movably connected to two sides of the inner wall of the adjustment box (105).

9. The testing device for studying the mechanical properties of fiber nano-metakaolin recycled concrete according to claim 8, characterized in that: The movable worm wheel (406) is meshingly connected to both sides of the outer wall of the movable worm (405), the inner wall of the movable worm wheel (406) is fixedly connected to a movable screw rod (407), and the right end of the movable screw rod (407) is movably connected to the right side of the inner wall of the adjustment box (105).

10. The testing device for studying mechanical properties of fiber nano-metakaolin recycled concrete according to claim 9, characterized in that: The left end of the movable screw rod (407) passes through the right side wall of the base (101) and is movably connected to the left side of the inner wall of the base (101). The outer walls of the movable screw rod (407) are threadedly connected to adjusting screw sleeves (408) on both sides. The outer walls of the adjusting screw sleeves (408) are fixedly connected to the front and rear sides of the sliding frame (104).

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