A cement mixing pile inspection device
The cement mixing pile inspection device with a support and guide plate structure uses an electromagnet and a motor to drive a scraper to remove soil, which solves the problem that existing equipment is difficult to accurately measure and clean the pile diameter, and achieves a fast and accurate inspection effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUBEI YANGTZE RIVER DREDGING ENG CO LTD
- Filing Date
- 2023-09-20
- Publication Date
- 2026-06-19
AI Technical Summary
Existing cement mixing pile inspection equipment is unable to accurately determine the pile diameter, and the cleaning equipment's force is either insufficient or excessive, which can easily lead to soil not being effectively scraped off or damage to the pile, affecting the construction quality.
The system employs a support and guide plate structure, combined with an electromagnet, motor, and scraper assembly. The rotating roller is magnetically clamped and rotates on the outside of the pile body. The scraper removes soil layer by layer, and the pile diameter is measured with a ruler. The hydraulic system and pressure regulating assembly ensure the accuracy of soil removal.
It enables rapid and accurate measurement and removal of pile diameter, ensuring the accuracy of inspection results, avoiding problems such as soil adhesion and insufficient strength, and improving construction quality.
Smart Images

Figure CN117027074B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of cement mixing pile inspection equipment, specifically a cement mixing pile inspection device. Background Technology
[0002] During the construction of cement mixing piles, to ensure the quality of the construction, it is often necessary to inspect the cement mixing piles, thus requiring the use of cement mixing pile inspection equipment. Patent application number CN201910456894.8 discloses a cement mixing pile construction quality testing device and method, suitable for inspecting the construction quality of cement mixing piles. Its structure is simple, novel, and unique, easy to implement, and the test results are reliable. According to its disclosed technical solution, existing cement mixing pile inspection equipment, when used, on the one hand, inspects the cement mixing pile... When inspecting the diameter of a cement-mixed pile, it is difficult to effectively determine the pile diameter because the pile is formed by mixing cement with soft soil underground. On the other hand, because the pile is formed by mixing cement with soft soil underground, it is easy for the pile to be non-standard cylindrical, which makes it difficult to quickly determine the effective radius of the pile. Furthermore, when removing the soil on the outside of the pile to accurately check the diameter, the cleaning equipment may not be strong enough to effectively scrape off the firmly adhered soil, or it may be too strong and damage the equipment, which is not conducive to ensuring the accurate removal of the outer soil. Summary of the Invention
[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a cement mixing pile inspection device to solve the problems mentioned in the background art. This invention has a novel structure, multiple functions, and is suitable for the inspection of cement mixing piles.
[0004] To achieve the above objectives, the present invention provides the following technical solution: a cement mixing pile inspection device, comprising a support sleeve and a guide plate. A telescopic assembly is installed inside the support sleeve, the telescopic assembly comprising an electromagnet and a spring. A rotating assembly is installed on the guide plate, the rotating assembly comprising a motor and a rotating roller. A soil-cleaning assembly is installed on the rotating roller, the soil-cleaning assembly comprising a scraper and a second spring. A pressure-regulating assembly is installed inside the rotating roller, the pressure-regulating assembly comprising an inner groove and a piston. A pressing assembly is installed at the bottom of the piston, the pressing assembly comprising a movable plate and a lead screw. A connecting assembly is installed at the top of the support sleeve, the connecting assembly comprising a sleeve and a connecting sleeve.
[0005] Furthermore, the outer side of one end of the guide plate is engaged with the inner wall of the support sleeve, the guide plates are evenly distributed on the outer side of the support sleeve, the other end of the guide plate passes through the support sleeve and extends to the outer side of the support sleeve, and a scale is engraved on the top of the guide plate.
[0006] Furthermore, the electromagnet is bolted to the center of the support sleeve, the guide plate is connected to the outer side of the electromagnet by a spring, the motor is bolted to the top of the other end of the guide plate, the top of the rotating roller passes through the guide plate and is keyed to the output shaft of the motor, and the rotating roller is mounted on the bottom of the guide plate by a bearing.
[0007] Furthermore, the rotating roller is provided with slots around its perimeter, one side of the scraper is connected to the inner wall of the slot by a spring, and the other side of the scraper passes through the slot and extends to the outer side of the rotating roller. The scrapers are evenly distributed on the rotating roller.
[0008] Furthermore, the inner groove is located at the center of the rotating roller, the top of the inner groove is connected to the slot, the piston is locked inside the inner groove, the flap is locked on the inner wall at the bottom of the inner groove, and the piston is connected to the top of the flap via a spring.
[0009] Furthermore, the bottom end of the lead screw is installed at the bottom of the rotating roller, and the top end of the lead screw passes through the bottom of the rotating roller through a bearing and extends to the inner side of the inner groove. The inner side of the flap is provided with an internal thread, and the lead screw is engraved with an external thread, and the internal thread and the external thread cooperate with each other.
[0010] Furthermore, the sleeve is welded to the top of the support sleeve, the connecting sleeve is welded to the bottom of the sleeve, the sleeve is connected to the support sleeve through the connecting sleeve, a one-way valve is installed on the inner side of the connecting sleeve, the sleeve is connected to the support sleeve in one direction through the one-way valve, and a solenoid valve is installed on the inner side of the connecting sleeve.
[0011] Furthermore, a pointed cone is welded to the bottom of the support sleeve, and the pointed cone is located at the bottom of the center of the support sleeve. Hydraulic oil is filled inside the inner groove, the support sleeve, and the sleeve.
[0012] Furthermore, a side plate is welded to one side of the support sleeve, and an electromagnet is bolted to the top of the inner side of the side plate.
[0013] Furthermore, a pressure plate is clamped at the bottom of the inner side of the side plate, and the top of the pressure plate is connected to an electromagnet via a spring four. A scribing rod is welded onto the pressure plate, and the scribing rod is evenly distributed on the pressure plate.
[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0015] 1. When using this cement mixing pile inspection device, the soil on the outer side of the top of the pile is excavated to form a ring groove structure. The support sleeve is then placed on top of the pile, and the rotating roller is inserted into the inner side of the ring groove on the outer side of the pile. Electromagnet one is activated; the electromagnet one uses magnetic force to compress the guide plate spring one, moving the inner side of the support sleeve and clamping the rotating roller into the inner side of the ring groove on the outer side of the pile. The motor is then activated, driving the rotating roller to rotate. The scraper on the rotating roller scrapes away the soil on the outer side of the pile. Simultaneously, the rotating roller rotates on the outer side of the pile, effectively utilizing the scraper to remove the soil. The soil on the outside of the pile is scraped off layer by layer until the rotating roller is clamped to the outside of the pile under the pull of the guide plate. When the scraper on the rotating roller is rotated to the outside of the pile by the motor, the scraper cannot be inserted into the inside of the pile. The scraper compresses the spring and moves to the inside of the groove, thus effectively removing the soil on the outside of the pile. At the same time, the diameter of the pile can be quickly determined by the scale on the guide plate, which facilitates the inspection of the effective diameter of the pile and ensures that the diameter of the pile can be accurately checked.
[0016] 2. When using this cement mixing pile inspection device, after the soil on the outside of the pile body is cleaned, first close the solenoid valve. The motor drives the rotating roller to rotate on the outside of the pile body. Under the attraction of electromagnet one, the guide plate drives the rotating roller to clamp onto the outside of the pile body. When the rotating roller rotates to the maximum diameter of the pile body, it pulls the guide plate outward. The hydraulic oil in the sleeve enters the inside of the support sleeve through the one-way valve. The maximum diameter of the pile body can be determined by the scale on the guide plate. Then, open the solenoid valve and close the motor. Under the attraction of electromagnet one, the guide plate... Pulling the support sleeve inward causes the guide plate to drive the rotating roller to roll on the outside of the pile. Personnel push the support sleeve back and forth until the rotating roller naturally stops on the outside of the pile. This positions the three rotating rollers on the outside of the minimum diameter of the pile. The minimum diameter of the pile can be determined by a scale. The effective diameter of the pile can be determined by the maximum and minimum diameters, and the difference can be used to check whether the pile is compliant. At the same time, the scribe on the side plate draws multiple concentric circles on the top of the pile under the pressure of the pressure plate, which is used to determine the position for subsequent sampling, testing and other work on the pile.
[0017] 3. When using this cement mixing pile inspection device, during the soil removal work on the pile body, the screw is rotated according to the standard strength value of the pile body. The screw drives the movable plate to move upward, which in turn causes the movable plate to press the piston upward through the spring. The piston forces the hydraulic oil in the inner groove to the inner side of the slot, so that when the scraper cleans the soil on the outside of the pile body, it can scrape off the outer layer of unmarkable structures until the pile body structure with sufficient strength is left. This avoids the outer layer structure with insufficient strength affecting the diameter inspection of the effective strength of the pile body, and avoids the situation where some firmly bonded soil and rocks cannot be removed, ensuring the accuracy of the inspection results of the effective diameter of the pile body. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of a cement mixing pile inspection device according to the present invention;
[0019] Figure 2 This is a top sectional view of a cement mixing pile inspection device according to the present invention;
[0020] Figure 3 This is a cross-sectional view of the rotating roller of a cement mixing pile inspection device according to the present invention.
[0021] Figure 4 This is a cross-sectional view of the support sleeve of the water tank of a cement mixing pile inspection device according to the present invention.
[0022] Figure 5 This is a cross-sectional view of the side plate of the pipe of the cement mixing pile inspection device of the present invention;
[0023] In the diagram: 1. Support sleeve; 2. Guide plate; 3. Electromagnet I; 4. Spring I; 5. Motor; 6. Rotary roller; 7. Slot; 8. Scraper; 9. Spring II; 10. Inner groove; 11. Piston; 12. Hinged plate; 13. Spring III; 14. Lead screw; 15. Sleeve; 16. Connecting sleeve; 17. One-way valve; 18. Solenoid valve; 19. Cone; 20. Side plate; 21. Electromagnet II; 22. Pressure plate; 23. Spring IV; 24. Sliding rod; 25. Ruler. Detailed Implementation
[0024] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.
[0025] Please see Figures 1 to 5This invention provides a technical solution: a cement mixing pile inspection device, comprising a support sleeve 1 and a guide plate 2. A telescopic assembly is installed inside the support sleeve, the telescopic assembly including an electromagnet 3 and a spring 4. A rotating assembly is installed on the guide plate 2, the rotating assembly including a motor 5 and a rotating roller 6. A soil-cleaning assembly is installed on the rotating roller 6, the soil-cleaning assembly including a scraper 8 and a spring 9. A pressure regulating assembly is installed inside the rotating roller 6, the pressure regulating assembly including an inner groove 10 and a piston 11. A pressing assembly is installed at the bottom of the piston 11, the pressing assembly including a movable plate 12 and a lead screw 14. A connecting assembly is installed at the top of the support sleeve 1. The assembly includes a sleeve 15 and a connecting sleeve 16. One end of the guide plate 2 is secured to the inner wall of the support sleeve 1. The guide plates 2 are evenly distributed on the outer side of the support sleeve 1. The other end of the guide plate 2 passes through the support sleeve 1 and extends to its outer side. A scale 25 is engraved on the top of the guide plate 2. The electromagnet 3 is bolted to the center of the support sleeve 1. The guide plate 2 is connected to the outer side of the electromagnet 3 via a spring 4. The motor 5 is bolted to the top of the other end of the guide plate 2. The top of the rotating roller 6 passes through the guide plate 2 and is keyed to the output shaft of the motor 5. The rotating roller 6 is mounted on the bottom of the guide plate 2 via bearings. Openings are formed around the circumference of the rotating roller 6. The device has a slot 7. One side of the scraper 8 is connected to the inner wall of the slot 7 via a spring 9. The other side of the scraper 8 passes through the slot 7 and extends to the outside of the rotating roller 6. The scrapers 8 are evenly distributed on the rotating roller 6. In use, the soil on the outer side of the top of the pile is excavated to form a ring groove structure. Then, the support sleeve 1 is placed on top of the pile, and the rotating roller 6 is inserted into the inner side of the ring groove on the outer side of the pile. The electromagnet 3 is turned on, and the electromagnet 3 uses magnetic force to compress the guide plate 2 and spring 4, moving the inner side of the support sleeve 1 and clamping the rotating roller 6 into the inner side of the ring groove on the outer side of the pile. Then, the motor 5 is turned on, and the motor 5 drives the rotating roller 6 to rotate. The scrapers 8 on the rotating roller 6 are used to remove the soil on the outer side of the pile. The soil is scraped off, and at the same time, the rotating roller 6 rotates on the outside of the pile body, thereby effectively scraping off the soil on the outside of the pile body layer by layer using the scraper 8. When the rotating roller 6 is clamped on the outside of the pile body under the pull of the guide plate 2, the scraper 8 on the rotating roller 6 driven by the motor 5 rotates to the outside of the pile body. The scraper 8 can no longer be inserted into the inside of the pile body, and the scraper 8 compresses the spring 9 and moves to the inside of the slot 7, thereby effectively removing the soil on the outside of the pile body. At the same time, the diameter of the pile body can be quickly determined by the scale 25 on the guide plate 2, which facilitates the inspection of the effective diameter of the pile body and ensures that the diameter of the pile body can be accurately checked.
[0026] In this embodiment, the inner groove 10 is located at the center of the rotating roller 6. The top of the inner groove 10 is connected to the slot 7. The piston 11 is engaged inside the inner groove 10. The movable plate 12 is engaged on the inner wall of the bottom of the inner groove 10. The piston 11 is connected to the top of the movable plate 12 via a spring 13. The bottom end of the lead screw 14 is installed at the bottom of the rotating roller 6, and the top end of the lead screw 14 passes through the bottom of the rotating roller 6 via a bearing and extends to the inner side of the inner groove 10. The inner side of the movable plate 12 is provided with an internal thread, and the lead screw 14 is engraved with an external thread. The internal thread and the external thread cooperate with each other. During use, when cleaning the soil from the pile body... Based on the standard strength value of the pile, the screw 14 is then rotated. The screw 14 drives the movable plate 12 to move upward, which in turn causes the movable plate 12 to press the piston 11 upward through the spring 13. The piston 11 then forces the hydraulic oil in the inner groove 10 to the inner side of the slot 7. This allows the scraper 8 to scrape off any unmarked structures encountered when cleaning the soil on the outside of the pile until only the pile structure with sufficient strength remains. This prevents the outer structure from affecting the diameter inspection of the effective strength of the pile and avoids situations where some firmly bonded soil and rocks cannot be removed, ensuring the accuracy of the inspection results for the effective diameter of the pile.
[0027] In this embodiment, the sleeve 15 is welded to the top of the support sleeve 1, and the connecting sleeve 16 is welded to the bottom of the sleeve 15. The sleeve 15 is connected to the support sleeve 1 through the connecting sleeve 16. A one-way valve 17 is installed on the inner side of the connecting sleeve 16, and the sleeve 15 is connected to the support sleeve 1 in one direction through the one-way valve 17. A solenoid valve 18 is installed on the inner side of the connecting sleeve 16. A pointed cone 19 is welded to the bottom of the support sleeve 1, and the pointed cone 19 is located at the bottom of the center of the support sleeve 1. The inner groove 10, the support sleeve 1, and the inner sides of the sleeve 15 are all... The support sleeve 1 is filled with hydraulic oil. A side plate 20 is welded to one side of the support sleeve 1. An electromagnet 21 is bolted to the top of the inner side of the side plate 20. A pressure plate 22 is clamped to the bottom of the inner side of the side plate 20. The top of the pressure plate 22 is connected to the electromagnet 21 via a spring 4 23. A guide bar 24 is welded to the pressure plate 22, and the guide bars 24 are evenly distributed on the pressure plate 22. After the soil on the outside of the pile body is cleaned, the solenoid valve 18 is closed first, and the motor 5 drives the rotating roller 6 to rotate on the outer side of the pile body. Under the attraction of electromagnet 3, plate 2 drives roller 6 to clamp onto the outer side of the pile body. When roller 6 rotates to the maximum diameter of the pile body, it pulls guide plate 2 outward. Hydraulic oil in sleeve 15 enters the inner side of support sleeve 1 through check valve 17. The maximum diameter of the pile body can be determined by the scale 25 on guide plate 2. Then, solenoid valve 18 is opened and motor 5 is turned off. Guide plate 2 is pulled inward by electromagnet 3, and guide plate 2 drives roller 6 to roll on the outer side of the pile body. Personnel push the support sleeve 1 back and forth until the rotating roller 6 stops naturally on the outside of the pile body, so that the three rotating rollers are located on the outside of the minimum diameter of the pile body. The minimum diameter of the pile body can be determined by the scale 25. The effective diameter of the pile body can be determined by the maximum and minimum diameters, and the pile body can be checked for compliance based on the difference. At the same time, the scribing rod 24 on the side plate 20 scribing multiple concentric circles on the top of the pile body under the pressure of the pressure plate 22, so as to determine the position for subsequent sampling, testing and other work on the pile body.
[0028] This cement mixing pile inspection device provides power to all electrical equipment via an external power supply. During use, the soil on the outer side of the pile top is excavated to form a ring groove structure. The support sleeve 1 is then placed on top of the pile, and the rotating roller 6 is inserted into the inner side of the ring groove on the outer side of the pile. The electromagnet 3 is activated, and its magnetic force causes the guide plate 2 to compress the spring 4, moving the inner side of the support sleeve 1 and clamping the rotating roller 6 into the inner side of the ring groove on the outer side of the pile. The motor 5 is then activated, driving the rotating roller 6 to rotate. The scraper 8 on the rotating roller 6 scrapes away the soil on the outer side of the pile. Simultaneously, the rotating roller 6 rotates on the outer side of the pile, effectively scraping away the soil layer by layer until the rotating roller 6 is clamped onto the outer side of the pile under the pull of the guide plate 2. When the scraper 8 on the rotating roller 6 driven by the motor 5 rotates to the outer side of the pile, the scraper 8 cannot be inserted into the inner side of the pile. This causes the scraper 8 to compress the spring 9 and move to the inner side of the slot 7, effectively removing the soil from the outside of the pile. At the same time, the diameter of the pile can be quickly determined by the scale 25 on the guide plate 2, facilitating the inspection of the effective diameter of the pile and ensuring accurate measurement of the pile diameter. During the soil removal process, based on the standard strength value of the pile, the screw 14 rotates, causing the movable plate 12 to move upward. This causes the movable plate 12 to press the piston 11 upward via the spring 13. The piston 11 then forces the hydraulic oil in the inner groove 10 into the slot 7. The scraper 8, when cleaning the soil on the outside of the pile, can scrape off any unmarkable outer structures until only the pile structure with sufficient strength remains. This prevents insufficient outer structure strength from affecting the diameter inspection of the effective pile and avoids situations where firmly bonded soil and rocks cannot be removed, ensuring the accuracy of the pile diameter inspection results. After the soil on the outside of the pile is cleaned, the solenoid valve 18 is closed, and the motor 5 drives the rotating roller 6 to rotate on the outside of the pile. Under the attraction of the electromagnet 3, the guide plate 2 drives the rotating roller 6 to clamp onto the outside of the pile. When the rotating roller 6 rotates to the maximum diameter of the pile, it pulls the guide plate 2 outward. Hydraulic oil enters the inner side of the support sleeve 1 through the one-way valve 17. The maximum diameter of the pile can be determined by the scale 25 on the guide plate 2. Then, the solenoid valve 18 is opened, and the motor 5 is turned off. The guide plate 2 is pulled inwards by the attraction of the electromagnet 3, causing the rotating roller 6 to roll on the outer side of the pile. Personnel push the support sleeve 1 back and forth until the rotating roller 6 naturally stops on the outer side of the pile. This positions the three rollers outside the minimum diameter of the pile, and the minimum diameter can be determined by the scale 25. This allows for the determination of the effective diameter of the pile by comparing the maximum and minimum diameters, and also enables the checking of pile compliance based on the difference. Simultaneously, the scribe bar 24 on the side plate 20, under the pressure of the pressure plate 22, draws multiple concentric circles on the top of the pile.This is to facilitate the location determination for subsequent sampling and testing of the piles.
[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A cement mixing pile inspection device, comprising a support sleeve (1) and a guide plate (2), the inner side of the support sleeve is provided with a telescopic assembly, the telescopic assembly comprises an electromagnet I (3) and a spring I (4), characterized in that: A rotating assembly is installed on the guide plate (2), the rotating assembly including a motor (5) and a rotating roller (6). A soil cleaning assembly is installed on the rotating roller (6), the soil cleaning assembly including a scraper (8) and a second spring (9). A pressure regulating assembly is installed on the inner side of the rotating roller (6), the pressure regulating assembly including an inner groove (10) and a piston (11). A pressing assembly is installed at the bottom of the piston (11), the pressing assembly including a flap (12) and a lead screw (14). A connecting assembly is installed on the top of the support sleeve (1), the connecting assembly including a sleeve (15) and a connecting sleeve (16). The outer side of one end of the guide plate (2) is engaged with the support sleeve (1). On the inner wall, the guide plate (2) is evenly distributed on the outside of the support sleeve (1). The other end of the guide plate (2) passes through the support sleeve (1) and extends to the outside of the support sleeve (1). The top of the guide plate (2) is engraved with a scale (25). The electromagnet (3) is installed at the center of the support sleeve (1) by bolts. The guide plate (2) is connected to the outer side of the electromagnet (3) by spring (4). The motor (5) is installed at the top of the other end of the guide plate (2) by bolts. The top of the roller (6) passes through the guide plate (2) and is keyed to the output shaft of the motor (5). The roller (6) is installed at the bottom of the guide plate (2) by bearings.
2. The cement mixing pile inspection device according to claim 1, characterized in that: The rotating roller (6) has slots (7) on all four sides. One side of the scraper (8) is connected to the inner wall of the slot (7) by a spring (9). The other side of the scraper (8) passes through the slot (7) and extends to the outside of the rotating roller (6). The scrapers (8) are evenly distributed on the rotating roller (6).
3. The cement mixing pile inspection device according to claim 2, characterized in that: The inner groove (10) is located at the center of the rotating roller (6). The top of the inner groove (10) is connected to the slot (7). The piston (11) is locked inside the inner groove (10). The flap (12) is locked on the inner wall at the bottom of the inner groove (10). The piston (11) is connected to the top of the flap (12) by a spring (13).
4. The cement mixing pile inspection device according to claim 3, characterized in that: The bottom end of the lead screw (14) is installed at the bottom of the rotating roller (6). The top end of the lead screw (14) passes through the bottom of the rotating roller (6) through a bearing and extends to the inner side of the inner groove (10). The inner side of the movable plate (12) is provided with an internal thread. The lead screw (14) is engraved with an external thread. The internal thread and the external thread are engaged.
5. A cement mixing pile inspection device according to claim 1, characterized in that: The sleeve (15) is welded to the top of the support (1), and the connecting sleeve (16) is welded to the bottom of the sleeve (15). The sleeve (15) is connected to the support (1) through the connecting sleeve (16). A one-way valve (17) is installed on the inner side of the connecting sleeve (16). The sleeve (15) is connected to the support (1) in one direction through the one-way valve (17). A solenoid valve (18) is installed on the inner side of the connecting sleeve (16).
6. A cement mixing pile inspection device according to claim 5, characterized in that: The bottom of the support sleeve (1) is welded with a pointed cone (19), which is located at the bottom of the center of the support sleeve (1). The inner groove (10), the support sleeve (1) and the sleeve (15) are all filled with hydraulic oil.
7. A cement mixing pile inspection device according to claim 6, characterized in that: A side plate (20) is welded to one side of the support (1), and an electromagnet (21) is installed on the top of the inner side of the side plate (20) by bolts.
8. A cement mixing pile inspection device according to claim 7, characterized in that: The bottom of the inner side of the side plate (20) is fitted with a pressure plate (22). The top of the pressure plate (22) is connected to the electromagnet (21) via a spring (23). A scribing rod (24) is welded onto the pressure plate (22). The scribing rod (24) is evenly distributed on the pressure plate (22).