Concrete quality detection device for constructional engineering

Abstract

The invention discloses a concrete quality detection device for constructional engineering, and relates to the technical field of concrete detection.The concrete quality detection device comprises a base, a shell is fixedly installed at the top of the base, a motor is fixedly installed at the top of the shell, a threaded rod is fixedly installed at the output end of the motor, and the threaded rod is in threaded connection with a sleeve; a workbench is fixedly installed at the top of the base, a fixing rod is fixedly installed on the circumferential face of the sleeve, a fixing column is fixedly installed at the bottom of the fixing rod, a bottom plate is fixedly installed at the bottom of the fixing column, a pressure detection device is arranged at the bottom of the bottom plate, and a protection device is arranged on the front portion of the shell. A clamping device is arranged at the top of the workbench, a collecting device is arranged at the bottom of the workbench, and fragments generated by concrete test block fracture or explosive cracking can be effectively isolated when the strength of a concrete test block is detected through downward movement of a protective plate, so that workers are prevented from being hurt by the fragments.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete detection, in particular to a concrete quality detection device for construction engineering. Background Art

[0002] In construction projects, concrete quality testing equipment is used to verify that concrete's performance and quality meet design requirements and relevant standards. As a commonly used material in construction, ensuring concrete's quality is crucial. Concrete quality testing equipment is typically used to test key indicators such as mechanical properties, compressive strength, impermeability, frost resistance, and cohesiveness.

[0003] Patent announcement number CN219573756U relates to the field of concrete testing technology. The patent discloses a concrete quality testing device for construction projects, including a quality testing component, which includes a testing box, a base plate, a fixing plate, an electric push rod, a clamping plate, a servo motor, a threaded column, an adjustment frame, a limit rod, a limit block, a bottom block, a top cover, a pressure plate, and a pressure sensor. This patent belongs to the field of concrete testing technology and specifically relates to a device for clamping and fixing concrete test blocks of different sizes to prevent inaccurate test data caused by displacement of the concrete test blocks during strength testing, narrowing the testing process of the concrete test blocks within a specified space, preventing safety hazards caused by the concrete test blocks being broken during the testing process, and ensuring the accuracy and safety of the testing of the concrete test blocks.

[0004] In the above patent, by narrowing the testing process of the concrete test block within the specified space, the safety hazard caused by the concrete test block being broken during the testing process is prevented, and the detection accuracy and safety of the concrete test block are guaranteed. However, when pressure is applied to the concrete test block, if the concrete test block cannot withstand the pressure and breaks, it is difficult to protect the area around the working area. This may cause some gravel to splash when the concrete test block is broken, causing the equipment to be hit and damaged. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a concrete quality detection device for construction engineering, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A concrete quality detection device for construction engineering, comprising a base, a housing fixedly mounted on the top of the base, a motor fixedly mounted on the top of the housing, a threaded rod fixedly mounted on the output end of the motor, the threaded rod being threadedly connected to a sleeve, a workbench fixedly mounted on the top of the base, a fixing rod fixedly mounted on the circumferential surface of the sleeve, a fixing column fixedly mounted on the bottom of the fixing rod, a bottom plate fixedly mounted on the bottom of the fixing column, a pressure detection device provided at the bottom of the bottom plate, a protective device provided at the front of the housing, a clamping device provided on the top of the workbench, and a collecting device provided at the bottom of the workbench; The gear train is a gear that is mounted on a gear train that is located on the gear train and is used to drive the gear train to move along the gear train, and the gear train is a gear that is mounted on a gear train that is located on the gear train.

[0007] According to the above technical solution, the gear 1 is meshed with the gear 2, and the gear 2 is meshed with the rack 1. The meshing ensures that the gear 1 can drive the gear 2 to rotate when it rotates, and the meshing ensures that the gear 2 can drive the rack 1 to move when it rotates.

[0008] According to the above technical solution, the clamping device includes a sliding rod, an inclined rod, an elastic telescopic rod, a splint and an inclined block 1. The sliding rod is slidably installed on the left side of the workbench, the inclined rod is fixedly installed on the top of the sliding rod, the elastic telescopic rod is fixedly installed on the inner wall of the shell, the splint is fixedly installed on the movable end of the elastic telescopic rod, and the inclined block 1 is fixedly installed on the left side of the splint. The guard plate moves downward and pushes the inclined rod to start moving. The movement of the inclined rod drives the sliding rod to start moving. The movement of the sliding rod drives the inclined block to start moving. The movement of the inclined block drives the splint to start moving. The splint moves to contact the concrete test block and clamps it.

[0009] According to the above technical solution, the clamping device also includes a sliding column, a push plate 1, a push block and an inclined block 2. The sliding column slides through the shell, and the push plate 1 is fixedly installed on one end of the sliding column away from the shell, the push block is fixedly installed on the top of the splint, and the inclined block 2 is fixedly installed on the top of the push plate 1. When the splint moves, the push block starts to move, and the push block moves to push the inclined block 2 to start moving. The movement of the inclined block 2 drives the push plate 1 to move. After the test is completed, the splint starts to move and reset under the action of the movable end of the elastic telescopic rod. The movement and reset of the splint drive the push block to start moving. The push block movement no longer pushes the inclined block 2, and then the push plate 1 starts to move and reset under the action of the spring 2.

[0010] According to the above technical solution, the sides of the slide rod and the inclined plane block 1 that are close to each other are both set as inclined planes, the top of the inclined plane rod is set as an inclined plane, and the sides of the push block and the inclined plane block 2 that are close to each other are both set as inclined planes, a spring 1 is set between the slide rod and the workbench, and a spring 2 is set between the push plate 1 and the inner wall of the shell. By setting the inclined plane, it is ensured that the slide rod can smoothly push the inclined plane block 1 when it moves, and by setting the inclined plane, it is ensured that the inclined plane rod can be pushed smoothly, and by setting the inclined plane, it is ensured that the push block can smoothly push the inclined plane block 2 when it moves, and by setting the spring 1, it is ensured that the slide rod can achieve self-reset, and by setting the spring 2, it is ensured that the push plate 1 can achieve self-reset.

[0011] According to the above technical solution, the collecting device includes two rotating shafts, a transmission belt 2, a gear 3, a rack 2 and a push plate 2. The two rotating shafts are rotatably installed on the top of the base, and the two rotating shafts are connected through a transmission belt 2. The gear 3 is fixedly installed on the top of the rotating shaft, the rack 2 is fixedly installed on the bottom of the inclined block 1, and the push plate 2 is fixedly installed on the right side of the transmission belt 2. When the inclined block 1 moves, the rack 2 starts to move, and the rack 2 moves to drive the gear 3 to rotate. The gear 3 rotates and drives the rotating shaft to rotate. The rotating shaft drives the transmission belt 2 to rotate. The transmission belt 2 drives the push plate 2 to move. The push plate 2 moves and pushes the debris cleaned from the workbench into the collection box.

[0012] According to the above technical solution, the collection device also includes a collection box, a handle, a pressing block, a card rod and a card block. The collection box is slidably installed at the bottom of the workbench, the handle is fixedly installed at the front of the collection box, the pressing block slides through the handle, the card rod is slidably installed at the front of the collection box, and the card block is fixedly installed at the front of the workbench. When enough debris is collected inside the collection box and needs to be cleaned, the staff manually presses the pressing block after the work is completed, so that the pressing block moves and contacts and pushes the card rod to start moving. The card rod moves and disengages from the card block. Then the staff pulls the handle to pull out the collection box, and then dumps the debris collected in the collection box into a centralized collection area.

[0013] According to the above technical solution, the gear three is engaged with the rack two, and the sides of the push block and the card rod that are close to each other are set as inclined surfaces. A spring three is set between the push plate two and the inner wall of the shell, a spring four is set between the push block and the collection box, and a spring five is set between the card rod and the handle. The engagement ensures that the rack two can drive the gear three to rotate when it moves, and the setting of the inclined surface ensures that the push block can smoothly push the card rod when it moves, and the setting of the spring three ensures that the push plate two can achieve self-reset, and the setting of the spring four ensures that the push block can achieve self-reset, and the setting of the spring five ensures that the card rod can achieve self-reset.

[0014] The present invention provides a concrete quality detection device for construction engineering, which has the following beneficial effects: (1) This invention can timely discover quality problems of concrete by testing the strength, ensure that the concrete meets the design and safety requirements, and ensure that the strength of the final concrete test block meets the design requirements, thereby improving the overall construction quality of the project and avoiding major safety hazards and economic losses that may occur in the later stage. By moving the guard plate downward to seal and protect the working area when testing the strength of the concrete test block, it can effectively isolate the fragments generated by the rupture or explosive collapse of the concrete test block to prevent them from injuring the workers. At the same time, the guard plate can prevent the fragments from scattering, protect the equipment from damage, and extend the service life of the test equipment.

[0015] (2) This invention ensures that the concrete test block is stable and does not move during the strength test by moving the clamping plate to contact and clamp the concrete test block, thereby avoiding test errors caused by the displacement of the test block. At the same time, the clamping plate can provide uniform pressure distribution to ensure the uniformity of the force on the test block, which helps to simulate the real force state during the test, thereby better reflecting the actual strength of the concrete. The push plate moves to push the debris that falls on the workbench, which can effectively ensure the cleanliness and safety of the experimental environment and provide a good working condition for the next test. At the same time, it can improve the work efficiency of the operator and reduce the time wasted due to the need to repeatedly clean the workbench.

[0016] (3) The invention pushes the debris cleaned from the workbench into the collection box by moving the push plate 2, ensuring that all residues in the cleaning process can be effectively concentrated and organized, so that concrete fragments, mortar, mud and other wastes can be collected quickly and orderly. At the same time, the waste in the collection box can be regularly centralized for treatment, avoiding the need to deal with scattered residues every time cleaning, reducing the tedious operations in the cleaning process, and improving work efficiency. By dumping the debris collected in the collection box into a centralized collection area, it is ensured that environmental protection and laboratory operation standards are met, avoiding littering or waste, reducing possible environmental risks, ensuring that the laboratory complies with relevant laws and standards, and ensuring that the collection box will not be displaced during operation due to the vibration generated when the equipment applies pressure to the concrete test block, so that the collection box remains stable during the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the motor and threaded rod structure of the present invention; Figure 3 It is a schematic cross-sectional view of the protective device structure of the present invention; Figure 4 This is a schematic cross-sectional view of the structure of the guard plate and the rack of the present invention; Figure 5 It is a schematic cross-sectional view of the structure of the clamping device of the present invention; Figure 6 This is a schematic cross-sectional view of the collecting device structure of the present invention; Figure 7 This is a schematic cross-sectional view of the collection box and handle structure of the present invention.

[0018] In the figure: 1. base; 2. shell; 3. motor; 4. threaded rod; 5. sleeve; 6. workbench; 7. fixed rod; 8. fixed column; 9. bottom plate; 10. pressure detection device; 11. rotating column; 12. transmission belt 1; 13. fixed block; 14. gear 1; 15. gear 2; 16. guard plate; 17. rack 1; 181. slide rod; 182. inclined rod; 183. elastic telescopic rod; 184. splint; 185. inclined block 1; 186. slide column; 187. push plate 1; 188. push block; 189. inclined block 2; 191. rotating shaft; 192. transmission belt 2; 193. gear 3; 194. rack 2; 195. push plate 2; 196. collection box; 197. handle; 198. press block; 199. clamping rod; 1910. clamping block. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 7 One embodiment of the present invention is: a concrete quality detection device for construction engineering, including a base 1, a housing 2 is fixedly mounted on the top of the base 1, a motor 3 is fixedly mounted on the top of the housing 2, a threaded rod 4 is fixedly mounted on the output end of the motor 3, the threaded rod 4 is threadedly connected to the sleeve 5, a workbench 6 is fixedly mounted on the top of the base 1, a fixing rod 7 is fixedly mounted on the circumferential surface of the sleeve 5, a fixing column 8 is fixedly mounted on the bottom of the fixing rod 7, a bottom plate 9 is fixedly mounted on the bottom of the fixing column 8, a pressure detection device 10 is provided at the bottom of the bottom plate 9, and a protective device is provided at the front of the housing 2; Among them, the protective device includes two rotating columns 11, a transmission belt 12, a fixed block 13, a gear 14, a gear 2 15, a guard plate 16 and a rack 17. The two rotating columns 11 are rotatably installed on the inner wall of the shell 2, and the two rotating columns 11 are connected through the transmission belt 12. One end of the fixed block 13 is fixedly installed on the back of the transmission belt 12, and the other end of the fixed block 13 is fixedly installed on the front of the fixed rod 7. The gear 14 is fixedly installed on the circumferential surface of the rotating column 11, the gear 2 15 is rotatably installed on the inner wall of the shell 2, the guard plate 16 is slidably installed on the front of the shell 2, and the rack 17 is fixedly installed on the back of the guard plate 16. When the guard plate 16 moves downward to test the strength of the concrete test block, the working area is closed and protected, which can effectively isolate the fragments generated by the rupture or explosive collapse of the concrete test block to prevent them from injuring the staff. At the same time, the guard plate 16 can prevent the fragments from scattering, protect the equipment from damage, and extend the service life of the test equipment.

[0021] Gear 1 14 is meshed with gear 2 15 , and gear 2 15 is meshed with rack 1 17 . The meshing ensures that gear 1 14 can drive gear 2 15 to rotate when it rotates, and the meshing ensures that gear 2 15 can drive rack 1 17 to move when it rotates.

[0022] When this embodiment is working: first, before work, the staff will check whether the working status of each component of the equipment is normal. After confirming that everything is correct, the concrete test block to be tested will be placed on the workbench 6. Then the staff will start the motor 3, so that the motor 3 drives the threaded rod 4 to start rotating. The threaded rod 4 rotates and drives the sleeve 5 to start moving downward. The sleeve 5 moves downward and drives the fixing rod 7 to move downward. The fixing rod 7 moves downward and drives the fixing column 8 to move downward. The fixing column 8 moves downward and drives the bottom plate 9 to move downward. The bottom plate 9 moves downward and drives the pressure detection device 10 to move downward. The pressure detection device 10 moves downward and contacts the concrete test block and continues to apply pressure until the concrete test block can no longer withstand the pressure and breaks. The pressure detection device 10 transmits data to the staff. By testing the strength, the quality problems of the concrete can be discovered in time to ensure that the concrete meets the design and safety requirements, while ensuring that the final concrete The strength of the concrete test block meets the design requirements, thereby improving the overall construction quality of the project and avoiding major safety hazards and economic losses that may occur in the later stage. When the fixed rod 7 moves downward, it drives the fixed block 13 to move downward. The downward movement of the fixed block 13 drives the transmission belt 12 to start rotating. The rotation of the transmission belt 12 drives the rotating column 11 to start rotating. The rotation of the rotating column 11 drives the gear 14 to start rotating. The rotation of the gear 14 drives the gear 2 15 to start rotating. The rotation of the gear 2 15 drives the rack 17 to start moving downward. The downward movement of the rack 17 drives the guard plate 16 to start moving downward. The downward movement of the guard plate 16 can effectively isolate the fragments generated by the rupture or explosive collapse of the concrete test block to prevent them from injuring the staff. At the same time, the guard plate 16 can prevent the fragments from scattering, protect the equipment from damage, and extend the service life of the test equipment.

[0023] See also Figure 1-Figure 7 On the basis of the above embodiment, in another embodiment of the present invention, a clamping device is provided on the top of the workbench 6, and a collecting device is provided at the bottom of the workbench 6. The clamping device includes a slide bar 181, an inclined rod 182, an elastic telescopic rod 183, a splint 184 and an inclined block 185. The slide bar 181 is slidably mounted on the left side of the workbench 6, the inclined rod 182 is fixedly mounted on the top of the slide bar 181, the elastic telescopic rod 183 is fixedly mounted on the inner wall of the shell 2, the splint 184 is fixedly mounted on the movable end of the elastic telescopic rod 183, and the inclined block 185 is fixedly mounted on the left side of the splint 184. The splint 184 moves to contact and clamp the concrete test block, which can ensure that the concrete test block is stable and does not move during the strength test, avoiding test errors caused by test block displacement. At the same time, the splint 184 can provide uniform pressure distribution, ensure the uniformity of force on the test block, and help simulate the real stress state in the test, thereby better reflecting the actual strength of the concrete.

[0024] The clamping device also includes a slide column 186, a push plate 187, a push block 188 and a ramp block 189. The slide column 186 slides through the shell 2, the push plate 187 is fixedly installed on the end of the slide column 186 away from the shell 2, the push block 188 is fixedly installed on the top of the clamping plate 184, and the ramp block 189 is fixedly installed on the top of the push plate 187. By moving the push plate 187 to push the debris dropped on the workbench 6, the cleanliness and safety of the experimental environment can be effectively ensured, and a good working condition can be provided for the next test. At the same time, the work efficiency of the operator can be improved, and the time wasted due to the need to repeatedly clean the workbench 6 can be reduced.

[0025] The sides of the slide bar 181 and the inclined plane block 1 185 that are close to each other are both set as inclined planes, the top of the inclined plane rod 182 is set as an inclined plane, and the sides of the push block 188 and the inclined plane block 2 189 that are close to each other are both set as inclined planes. A spring 1 is set between the slide bar 181 and the workbench 6, and a spring 2 is set between the push plate 1 187 and the inner wall of the shell 2. By setting the inclined plane, it is ensured that the slide bar 181 can smoothly push the inclined plane block 1 185 when moving, and by setting the inclined plane, it is ensured that the inclined plane rod 182 can be pushed smoothly, and by setting the inclined plane, it is ensured that the push block 188 can smoothly push the inclined plane block 2 189 when moving, and by setting the spring 1, it is ensured that the slide bar 181 can achieve self-reset, and by setting the spring 2, it is ensured that the push plate 187 can achieve self-reset.

[0026] The collecting device includes two rotating shafts 191, a transmission belt 2 192, a gear 3 193, a rack 2 194 and a push plate 2 195. The two rotating shafts 191 are rotatably mounted on the top of the base 1. The two rotating shafts 191 are connected through the transmission belt 2 192. The gear 3 193 is fixedly mounted on the top of the rotating shaft 191, the rack 2 194 is fixedly mounted on the bottom of the inclined block 185, and the push plate 2 195 is fixedly mounted on the right side of the transmission belt 2 192. The push plate 2 195 moves to push the debris cleaned from the workbench 6 into the collection box 196, ensuring that all residues in the cleaning process can be effectively concentrated and organized, so that concrete fragments, mortar, mud and other wastes can be collected quickly and orderly. At the same time, the waste in the collection box 196 can be regularly processed in a centralized manner to avoid the need to deal with scattered residues every time cleaning is performed, reducing the tedious operations in the cleaning process and improving work efficiency.

[0027] The collecting device also includes a collecting box 196, a handle 197, a push block 198, a clamping rod 199 and a clamping block 1910. The collecting box 196 is slidably mounted on the bottom of the workbench 6, the handle 197 is fixedly mounted on the front of the collecting box 196, the push block 198 slides through the handle 197, the clamping rod 199 is slidably mounted on the front of the collecting box 196, and the clamping block 1910 is fixedly mounted on the front of the workbench 6. By dumping the debris collected in the collecting box 196 into a centralized collection area, compliance with environmental protection and laboratory operation standards is ensured, littering of garbage or waste is avoided, possible environmental hazards are reduced, and the laboratory is ensured to comply with relevant laws and standards. At the same time, it is ensured that the collecting box 196 will not be displaced during operation due to the vibration generated when the equipment applies pressure to the concrete test block, so that the collecting box 196 remains stable during the detection process.

[0028] Gear three 193 is meshed with rack two 194, and the sides of the push block 198 and the card rod 199 that are close to each other are set as inclined surfaces. A spring three is set between the push plate two 195 and the inner wall of the shell 2, a spring four is set between the push block 198 and the collection box 196, and a spring five is set between the card rod 199 and the handle 197. The meshing ensures that the rack two 194 can drive the gear three 193 to rotate when it moves, and the setting of the inclined surface ensures that the push block 198 can smoothly push the card rod 199 when it moves, and the setting of the spring three ensures that the push plate two 195 can achieve self-reset, and the setting of the spring four ensures that the push block 198 can achieve self-reset, and the setting of the spring five ensures that the card rod 199 can achieve self-reset.

[0029] When this embodiment is working: when the guard plate 16 moves downward, it pushes the inclined rod 182 to start moving, the movement of the inclined rod 182 drives the sliding rod 181 to start moving, the movement of the sliding rod 181 drives the inclined block 185 to start moving, the movement of the inclined block 185 drives the clamping plate 184 to start moving, the clamping plate 184 moves to contact the concrete test block and clamp it, which can ensure that the concrete test block is stable and does not move during the strength test, avoiding the test error caused by the displacement of the test block, and at the same time the clamping plate 184 can provide uniform pressure distribution, ensure the uniformity of the force on the test block, help simulate the real force state in the test, so as to better reflect the actual strength of the concrete, and drive the push block 188 to start Move, the push block 188 moves to push the inclined plane block 2 189 to start moving, the inclined plane block 2 189 moves to drive the push plate 187 to start moving, after the test is completed, the splint 184 starts to move and reset under the action of the movable end of the elastic telescopic rod 183, the splint 184 moves and resets to drive the push block 188 to start moving, the push block 188 moves and no longer pushes the inclined plane block 2 189, then the push plate 187 starts to move and reset under the action of the spring 2, the push plate 187 moves to push the debris dropped on the workbench 6, which can effectively ensure the cleanliness and safety of the experimental environment and provide a good working condition for the next test, while improving the work efficiency of the operator and reducing the time wasted due to the need to repeatedly clean the workbench 6.

[0030] As the inclined plane block 185 moves, it drives the rack 2 194 to start moving, the rack 2 194 moves and drives the gear 3 193 to start rotating, the gear 3 193 rotates and drives the shaft 191 to start rotating, the shaft 191 rotates and drives the transmission belt 2 192 to start rotating, the transmission belt 2 192 rotates and drives the push plate 2 195 to start moving, and the push plate 2 195 moves to push the debris cleaned from the workbench 6 into the collection box 196, ensuring that all residues in the cleaning process can be effectively concentrated and organized, so that concrete fragments, mortar, mud and other wastes can be collected quickly and orderly. At the same time, the waste in the collection box 196 can be regularly centralized for processing, avoiding the need to deal with scattered residues every time cleaning, reducing the operation in the cleaning process, and improving work efficiency. When enough debris has been collected inside the box 196 and needs to be cleaned, the staff will manually press the button 198 after the work is completed, so that the button 198 moves to contact and push the clamping rod 199 to start moving. The clamping rod 199 moves and disengages from the clamping block 1910. Then the staff pulls the handle 197 to pull out the collection box 196, and then dumps the debris collected in the collection box 196 into a centralized collection area to ensure that it meets the standards of environmental protection and laboratory operations, avoids littering or waste, reduces possible environmental risks, ensures that the laboratory complies with relevant laws and standards, and ensures that the collection box 196 will not be displaced during operation due to the vibration generated when the equipment applies pressure to the concrete test block, so that the collection box 196 remains stable during the detection process.

[0031] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A concrete quality detection device for construction engineering, comprising a base (1), characterized in that: A housing (2) is fixedly mounted on the top of the base (1), a motor (3) is fixedly mounted on the top of the housing (2), a threaded rod (4) is fixedly mounted on the output end of the motor (3), the threaded rod (4) is threadedly connected to the sleeve (5), a workbench (6) is fixedly mounted on the top of the base (1), a fixing rod (7) is fixedly mounted on the circumferential surface of the sleeve (5), a fixing column (8) is fixedly mounted on the bottom of the fixing rod (7), a bottom plate (9) is fixedly mounted on the bottom of the fixing column (8), a pressure detection device (10) is provided at the bottom of the bottom plate (9), a protective device is provided at the front of the housing (2), a clamping device is provided at the top of the workbench (6), and a collecting device is provided at the bottom of the workbench (6); The protective device comprises two rotating columns (11), a transmission belt 1 (12), a fixed block (13), a gear 1 (14), a gear 2 (15), a guard plate (16) and a rack 1 (17), wherein the two rotating columns (11) are rotatably mounted on the inner wall of the housing (2), the two rotating columns (11) are connected by transmission belt 1 (12), one end of the fixed block (13) is fixedly mounted on the back of the transmission belt 1 (12), and the other end of the fixed block (13) is fixedly mounted on the front of the fixed rod (7), the gear 1 (14) is fixedly mounted on the circumferential surface of the rotating column (11), the gear 2 (15) is rotatably mounted on the inner wall of the housing (2), the guard plate (16) is slidably mounted on the front of the housing (2), and the rack 1 (17) is fixedly mounted on the back of the guard plate (16).

2. A concrete quality detection device for construction engineering according to claim 1, characterized in that: The gear 1 (14) is meshed with the gear 2 (15), and the gear 2 (15) is meshed with the rack 1 (17).

3. A concrete quality detection device for construction engineering according to claim 2, characterized in that: The clamping device includes a slide bar (181), an inclined rod (182), an elastic telescopic rod (183), a splint (184) and an inclined block (185), wherein the slide bar (181) is slidably mounted on the left side of the workbench (6), the inclined rod (182) is fixedly mounted on the top of the slide bar (181), the elastic telescopic rod (183) is fixedly mounted on the inner wall of the housing (2), the splint (184) is fixedly mounted on the movable end of the elastic telescopic rod (183), and the inclined block (185) is fixedly mounted on the left side of the splint (184).

4. A concrete quality detection device for construction engineering according to claim 3, characterized in that: The clamping device also includes a slide column (186), a push plate 1 (187), a push block (188) and a bevel block 2 (189), wherein the slide column (186) slides through the housing (2), the push plate 1 (187) is fixedly mounted on an end of the slide column (186) away from the housing (2), the push block (188) is fixedly mounted on the top of the clamping plate (184), and the bevel block 2 (189) is fixedly mounted on the top of the push plate 1 (187).

5. A concrete quality detection device for construction engineering according to claim 4, characterized in that: The sides of the slide rod (181) and the inclined plane block 1 (185) that are close to each other are both set as inclined planes, the top of the inclined plane rod (182) is set as an inclined plane, the sides of the push block (188) and the inclined plane block 2 (189) that are close to each other are both set as inclined planes, a spring 1 is set between the slide rod (181) and the workbench (6), and a spring 2 is set between the push plate 1 (187) and the inner wall of the shell (2).

6. A concrete quality detection device for construction engineering according to claim 5, characterized in that: The collecting device comprises two rotating shafts (191), a second transmission belt (192), a third gear (193), a second rack (194) and a second push plate (195), wherein the two rotating shafts (191) are rotatably mounted on the top of the base (1), the two rotating shafts (191) are connected by transmission through the second transmission belt (192), the third gear (193) is fixedly mounted on the top of the rotating shaft (191), the second rack (194) is fixedly mounted on the bottom of the first inclined plane block (185), and the second push plate (195) is fixedly mounted on the right side of the second transmission belt (192).

7. A concrete quality detection device for construction engineering according to claim 6, characterized in that: The collecting device further comprises a collecting box (196), a handle (197), a pressing block (198), a clamping rod (199) and a clamping block (1910); the collecting box (196) is slidably mounted on the bottom of the workbench (6); the handle (197) is fixedly mounted on the front of the collecting box (196); the pressing block (198) slides through the handle (197); the clamping rod (199) is slidably mounted on the front of the collecting box (196); and the clamping block (1910) is fixedly mounted on the front of the workbench (6).

8. The concrete quality detection device for construction engineering according to claim 7, characterized in that: The gear three (193) is meshed with the rack two (194), the sides of the push block (198) and the clamping rod (199) that are close to each other are both set as inclined surfaces, a spring three is set between the push plate two (195) and the inner wall of the shell (2), a spring four is set between the push block (198) and the collection box (196), and a spring five is set between the clamping rod (199) and the handle (197).

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