A concrete multi-point sampling machine and method

Abstract

The present invention belongs to the technical field of concrete sampling, and specifically discloses a concrete multi-point sampling machine and method, wherein the concrete multi-point sampling machine comprises a fixed frame, a fixed frame, a fixed plate, an anti-instability mechanism, an auxiliary connection mechanism, a first sampling mechanism, a second sampling mechanism, a first motor, an adjustment tooth plate and a first adjustment gear, wherein the fixed plate is fixedly connected to the middle of both sides of the fixed frame, the fixed frame is fixedly connected to the middle upper end of the fixed frame, the first sampling mechanism and the second sampling mechanism are slidably installed inside the two ends of the fixed frame, and the first sampling mechanism and the second sampling mechanism have the same structure. The present invention arranges the first sampling mechanism and the second sampling mechanism, and the spacing between the first sampling mechanism and the second sampling mechanism can be adjusted and controlled, so that different positions on the concrete can be sampled.

Description

Technical Field

[0001] The invention relates to the technical field of concrete sampling, in particular to a concrete multi-point sampling machine and method. Background Art

[0002] Concrete is a building material made of cementitious materials, granular aggregates (also called aggregates), water, and admixtures and additives added when necessary in a certain proportion, and is evenly mixed, compacted, and cured and hardened. Its quality has an important impact on the quality and structural stability of the building. In order to ensure the quality of concrete, sampling and testing must be carried out during the construction process. At present, concrete sampling is mostly handled manually, with random sampling of concrete materials, placed in a storage bucket, and then placed in an instrument for subsequent testing.

[0003] For example, a concrete sampling mechanism with Chinese patent publication number CN215339006U, the prior art includes a concrete sampling mechanism body, a sampling support tube, a sampler and a stable chassis, the bottom of the concrete sampling mechanism body is fixedly connected with the sampling support tube, the bottom of the sampling support tube is fixedly connected with the stable chassis, the top middle part of the sampling support tube is fixedly connected with the top crossbeam, the top middle part of the concrete sampling mechanism body is movably connected with the sampler, the sampler can be embedded downward into the poured and compacted concrete to perform sampling work, the sampler is inserted downward into the poured and compacted concrete, so that the concrete sample is embedded into the inner sampling tube from the sampling port, and then the transmission rod is rotated counterclockwise to allow the adjustment cover to cover the sampling port, thereby sealing the port at the bottom of the inner sampling tube, and then the sampler is pulled out upward, thereby ensuring the integrity of the concrete sample and effectively improving the sampling effect of the sampler.

[0004] However, the above-mentioned mechanism and the existing concrete sampling mechanism cannot perform multi-point sampling during use, which makes the sampling unrepresentative and cannot achieve multi-point sampling in the horizontal and vertical directions. Instability is prone to occur during the sampling process, which is very likely to cause danger. In addition, the sampling mechanism cannot be detected in time and is prone to damage, which greatly reduces the safety and reliability of the mechanism. Therefore, a mechanism is urgently needed to solve the above problems and improve the practical performance of the equipment. Summary of the invention

[0005] The object of the present invention is to provide a concrete multi-point sampling machine and method to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a concrete multi-point sampler, comprising a fixed frame, a fixed frame, a fixed plate, an anti-instability mechanism, an auxiliary connecting mechanism, a first sampling mechanism, a second sampling mechanism, a first motor, an adjusting tooth plate and a first adjusting gear, the fixed plate is fixedly connected to the middle of both sides of the fixed frame, the fixed frame is fixedly connected to the middle upper end of the fixed frame, a plurality of groups of threaded holes are opened on the fixed plate, and the anti-instability mechanism is installed at the bottom of the fixed plate, the auxiliary connecting mechanism is installed at the top of the fixed plate, the first sampling mechanism and the second sampling mechanism are slidably installed inside the two ends of the fixed frame, and the first sampling mechanism and the second sampling mechanism have the same structure, the adjusting tooth plate is fixedly connected to the center of the first sampling mechanism and the second sampling mechanism, the first adjusting gear is rotatably arranged at the rear end of the adjusting tooth plate, the adjusting tooth plate is meshed with the first adjusting gear, the first motor is fixedly connected to the upper end of the first adjusting gear, and the first motor is fixedly installed on the fixed frame.

[0007] Preferably, the first sampling mechanism and the second sampling mechanism both include a sliding adjustment card plate, a fixed limit frame, a first hydraulic cylinder, a second motor, a first synchronous belt, a synchronous rotating wheel, a sliding adjustment plate and a sampling part. The synchronous rotating wheel is rotatably installed at the center of the upper right side of the sliding adjustment plate, the first synchronous belt rotates at the center of the second motor and the synchronous rotating wheel, the sliding adjustment card plate is installed at the left end of the fixed limit frame, the fixed limit frame is slidably clamped on the sliding adjustment plate, the first hydraulic cylinder is evenly and fixedly connected to the upper end of the fixed limit frame, and the sampling part is arranged at the lower end of the fixed limit frame.

[0008] Preferably, the upper end of the sampling part is fixedly connected to a second hydraulic cylinder, the upper end of the second hydraulic cylinder is fixedly connected to a supporting table, fixed support plates are fixedly installed on the upper parts of both ends of the supporting table, movable adjustment plates are provided on both sides of the fixed support plates, and a connecting cross plate is fixedly installed between the outer ends of the movable adjustment plates, the bottom of the second adjusting gear is rotatably inserted into the supporting table, the synchronously rotating connecting wheel is fixedly connected to the middle part of the upper end of the second adjusting gear, the second synchronous belt is rotatably clamped between the synchronously rotating connecting wheels, the limit fixing plate is fixedly connected to the supporting table, the third motor is fixedly connected to the limit fixing plate by bolts, the movable tooth plate is fixedly connected to the inner side of the connecting cross plate, the movable tooth plate is meshingly connected to the second adjusting gear, the limit support arm is symmetrically fixedly connected to the upper part of the support table, and the connecting cross plate is slidably clamped inside the limit support arm.

[0009] Preferably, the sampling part includes a sealing slide, a fastening bolt, a collecting frame, a driving rod, a movable adjustment plate, a sampling groove, a blocking column, a blocking plate, an inserting vertebra and a spiral rotating column, the inserting vertebra is fixedly connected to the bottom end of the collecting frame, the sampling grooves are evenly arranged on the outside of the collecting frame, the fastening bolts are slidably arranged on the collecting frame, and the sealing slide is located below the sampling groove at a corresponding position, the fastening bolts are threadedly rotated and installed on the collecting frame, and the fastening bolts are in extrusion contact with both sides of the sealing slide, the blocking plate is evenly fixedly installed inside the collecting frame, and the blocking plate is located above the sampling groove at a corresponding position, the blocking column is clamped inside the sampling groove, the movable adjustment plate is fixedly connected to the outer end of the blocking column, the spiral rotating column is fixedly installed on the driving rod, the driving rod is rotationally installed inside the collecting frame, and the spiral rotating column is located at the sampling groove.

[0010] Preferably, the upper end of the movable adjustment plate is fixedly connected to the movable adjustment plate, the upper end of the driving rod is fixedly connected to the middle part of the bottom end of the synchronous rotating wheel, the adjusting tooth plate is fixedly connected to the fixed limiting frame, the sliding adjustment card plate is slidably connected to the inside of the fixed frame, and the bottom end of the first hydraulic cylinder is fixedly connected to the upper end of the sliding adjustment plate.

[0011] Preferably, the outer wall of the collecting frame is provided with scale lines, and the scale lines are arranged in a longitudinal distribution, and the scale lines are used to detect the depth of insertion into concrete.

[0012] The anti-instability mechanism includes: a conical connector, a conical outer wall of the conical connector is provided with a connecting thread, and the conical connector is connected to a threaded hole of a fixed plate through the connecting thread, an annular groove is opened on the outer wall of the conical connector, and a plurality of fan-shaped units are arranged around the outer wall of the conical connector, each group of fan-shaped units includes: two groups of magnetic blocks, a T-shaped guide head is fixedly provided on one side of the magnetic block close to the conical connector, and the T-shaped guide head is movably arranged in the annular groove, an anti-slip handle is fixedly provided on the top of the magnetic block, a plurality of connecting blades are movably connected between the two groups of magnetic blocks, and the connecting blades are movably connected between each other.

[0013] The anti-instability mechanism includes: a conical connector, a conical outer wall of the conical connector is provided with a connecting thread, and the conical connector is connected to a threaded hole of a fixed plate through the connecting thread, an annular groove is opened on the outer wall of the conical connector, and a plurality of fan-shaped units are arranged around the outer wall of the conical connector, each group of fan-shaped units includes: two groups of magnetic blocks, a T-shaped guide head is fixedly provided on one side of the magnetic block close to the conical connector, and the T-shaped guide head is movably arranged in the annular groove, an anti-slip handle is fixedly provided on the top of the magnetic block, a plurality of connecting blades are movably connected between the two groups of magnetic blocks, and the connecting blades are movably connected between each other.

[0014] It also includes a sampling monitoring unit, which includes:

[0015] A speed sensor 1, arranged in the sampling part, for detecting the displacement speed of the sampling part;

[0016] A rotation speed sensor 1, arranged on the output shaft of the second motor, for detecting the rotation speed of the second motor;

[0017] A second speed sensor is arranged on the spiral rotating column and is used to detect the rotation speed of the spiral rotating column;

[0018] An alarm device is arranged on the outer surface of the fixing frame;

[0019] The controller is arranged on the outer surface of the fixing frame, and the controller is electrically connected to the speed sensor 1, the rotation speed sensor 1, the rotation speed sensor 2 and the alarm respectively. The controller controls the alarm to work based on the speed sensor 1, the rotation speed sensor 1 and the rotation speed sensor 2, including:

[0020] Step 1: The controller calculates the stability coefficient of the first synchronous belt in long-term use based on speed sensor 1, speed sensor 1 and speed sensor 2 and the formula:

[0021]

[0022] Among them, X is the stability coefficient of the first synchronous belt in long-term use, V1 is the detection value of speed sensor 1, n1 is the detection value of speed sensor 1, n2 is the detection value of speed sensor 2, r1 is the radius of the output shaft of the second motor, r2 is the radius of the spiral rotating column, π is 3, 14, L1 is the length of the spiral rotating column, L2 is the length of the first synchronous belt, μ1 is the friction coefficient between the first synchronous belt and the synchronous rotating wheel, is the Poisson's ratio of the first synchronous belt material, P is the effective stress concentration factor of the first synchronous belt, S1 is the surface area of ​​the spiral rotating column intruding into the concrete, N is the bending section coefficient of the first synchronous belt, and ln is the natural logarithm;

[0023] Step 2: Based on step 1, the controller calculates the working state index of the sampling mechanism based on speed sensor 1, rotation speed sensor 1, rotation speed sensor 2 and the formula:

[0024]

[0025] Among them, Y is the working state index of the sampling mechanism, μ2 is the friction coefficient between the spiral rotating column and the concrete, is the Poisson's ratio of the first synchronous belt material, H is the depth of the spiral rotating column penetrating into the concrete, and K is the preset abrasion coefficient of the concrete on the spiral rotating column;

[0026] Step 3: The controller compares the working state index of the sampling mechanism with a preset working state index. When the working state index of the sampling mechanism is less than the working state index, the controller controls the alarm to issue an alarm prompt.

[0027] The present invention also provides a concrete multi-point method based on the above concrete multi-point sampling machine, comprising the following steps:

[0028] S1. Connect the mechanism with the external lifting mechanism through the auxiliary connecting mechanism. When sampling, first deploy the anti-instability mechanism to make safety preparations, then start the first motor to drive the first adjusting gear to rotate. The rotating first adjusting gear can make the sliding adjustment card plates in the first sampling mechanism and the second sampling mechanism slide along the inside of the fixed frame through the adjusting tooth plate, so as to adjust and control the use of the first sampling mechanism and the second sampling mechanism and the sampling interval and position;

[0029] S2. After the sampling intervals of the first sampling mechanism and the second sampling mechanism are adjusted, the first hydraulic cylinder is started to slide the second sampling mechanism downward along the fixed limit frame. At this time, the sampling part can be inserted into the concrete in combination with the external lifting mechanism;

[0030] S3, then start the third motor to drive the synchronous rotating connecting wheel to rotate, the synchronous rotating connecting wheels are synchronized by the second synchronous belt, the rotating synchronous rotating connecting wheel can drive the second adjusting gear to rotate, the rotating second adjusting gear can push the movable adjusting plate to move outward through the movable tooth plate and the connecting cross plate, and the movable adjusting plate moving outward can make each blocking column be pulled out from the inside of the sampling slot through the movable adjusting plate;

[0031] S4, and at this time, the second motor is started to drive the synchronous rotating wheel to rotate, and the rotating synchronous rotating wheel realizes the synchronous rotation between the synchronous rotating wheels through the first synchronous belt, and the rotating synchronous rotating wheel can drive the driving rod to rotate, and the rotating driving rod can drive the spiral rotating column to rotate, and the rotating spiral rotating column forms a vortex at the sampling slot, so that the external concrete enters the inside of the collection frame from the sampling slot, and the blocking separation is realized by the blocking plate, so that the concrete of different heights inside the collection frame can flow into different depths, and the second hydraulic cylinder can be started to assist the movable adjustment plate to slide outward, so that when the sampling part is inserted deep into the concrete, the movable adjustment plate can be moved to pull the blocking column out of the sampling slot;

[0032] S5. The sealing slide plate is pulled out by tightening the fastening bolts, so that the concrete at different positions can be sampled from the inner flow of the collection frame.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The present invention provides a first sampling mechanism and a second sampling mechanism, and the distance between the first sampling mechanism and the second sampling mechanism can be adjusted and controlled, so that sampling can be performed at different positions on the concrete.

[0035] Second, the present invention can achieve multi-point synchronous sampling by symmetrically arranging sampling parts at the bottom of the first sampling mechanism and the second sampling mechanism.

[0036] 3. The present invention provides a sampling part, which can be used to complete multi-point separate and independent sampling of concrete at different depths, so that the sampling range is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0038] Figure 1 It is a schematic diagram of the three-dimensional structure of the main body of the concrete multi-point sampling machine of the present invention from the front view;

[0039] Figure 2 It is a schematic diagram of the three-dimensional structure of the main body of the concrete multi-point sampling machine of the present invention from the right perspective;

[0040] Figure 3 It is a schematic diagram of the main internal structure of the concrete multi-point sampling machine in the present invention;

[0041] Figure 4 It is a structural schematic diagram of the first sampling mechanism of the concrete multi-point sampling machine of the present invention;

[0042] Figure 5 It is a schematic diagram of the upper structure of the first sampling mechanism of the concrete multi-point sampling machine of the present invention;

[0043] Figure 6 It is a schematic diagram of the internal structure of the upper end of the first sampling mechanism of the concrete multi-point sampling machine of the present invention;

[0044] Figure 7 It is a schematic diagram of the bottom structure at both ends of the support plate of the concrete multi-point sampling machine of the present invention;

[0045] Figure 8 It is a schematic diagram of the structure of the sampling part of the concrete multi-point sampling machine of the present invention;

[0046] Fig. 9 It is a schematic diagram of the driving rod structure of the concrete multi-point sampling machine in the present invention;

[0047] Fig.10 It is a structural schematic diagram of a second embodiment of a collection frame of a concrete multi-point sampling machine in the present invention;

[0048] Fig.11It is a schematic diagram of the positions of the anti-instability mechanism and the auxiliary connection mechanism in the concrete multi-point sampling machine of the present invention;

[0049] Fig.12 Schematic diagram of the anti-instability mechanism structure in the concrete multi-point sampling machine of the present invention Figure 1 ;

[0050] Fig.13 Schematic diagram of the anti-instability mechanism structure in the concrete multi-point sampling machine of the present invention Figure 2 ;

[0051] Fig.14 Schematic diagram of the anti-instability mechanism structure in the concrete multi-point sampling machine of the present invention Figure 3 ;

[0052] Fig.15 The structure of the auxiliary connection mechanism in the concrete multi-point sampling machine of the present invention is shown in FIG. Figure 1 ;

[0053] Fig.16 The structure of the auxiliary connection mechanism in the concrete multi-point sampling machine of the present invention is shown in FIG. Figure 2 ;

[0054] Fig.17 for Fig.15 Enlarged view of point A in the middle;

[0055] Fig.18 for Fig.15 Enlarged view of point B in the middle.

[0056] In the figure: 1-fixed frame, 2-fixed frame, 3-fixed plate, 301, threaded hole 1; 302, anti-instability mechanism; 303, auxiliary connection mechanism; 4-first sampling mechanism, 5-second sampling mechanism, 6-first motor, 7-adjusting tooth plate, 8-first adjusting gear, 9-sliding adjustment card plate, 10-fixed limit frame, 11-first hydraulic cylinder, 12-second motor, 13-first synchronous belt, 14-synchronous rotating wheel, 15-sliding adjustment plate, 16-sampling part, 17-fixed support plate, 18-movable adjustment plate, 19-second hydraulic cylinder, 20-third motor, 21-limited fixed plate, 22-limited support arm, 23-second synchronous belt, 24-connecting horizontal plate, 25-moving tooth plate, 26-synchronous rotating connecting wheel, 27-support table, 28-second adjusting gear, 29-fixed connection frame, 30-seal Slide plate, 31-fastening bolt, 32-collection frame, 33-driving rod, 34-movable adjustment plate, 35-sampling slot, 36-blocking column, 37-blocking plate, 38-inserting vertebral body, 39-spiral rotating column, 40-scale line; 41-conical connector; 42-connecting thread; 43-annular slot; 44-fan-shaped unit; 45-magnetic block; 46-T-type guide head; 47-anti-slip handle; 48-connecting blade ;49-connecting plate;50-threaded hole two;51-damping element;52-driving cylinder;53-first connecting rod;54-buffer spring;55-top plate;56-connecting shaft;57-bending gripper;58-L-type locking plate;59-limiting plate;60-guide push head;61-guide groove;62-installing groove;63-elastic reset plate;64-anti-slip plate;65-rubber gasket;66-anti-slip pattern;67-sleeve. DETAILED DESCRIPTION

[0057] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0058] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0059] The present invention is further described below in conjunction with the accompanying drawings.

[0060] Example 1

[0061] See also Figure 1 , Figure 2 and Figure 3 , an embodiment of the present invention: a concrete multi-point sampling machine, comprising a fixed frame 1, a fixed frame 2, a fixed plate 3, an anti-instability mechanism 302, an auxiliary connection mechanism 303, a first sampling mechanism 4, a second sampling mechanism 5, a first motor 6, an adjustment tooth plate 7 and a first adjustment gear 8, the fixed plate 3 is fixedly connected to the middle of both sides of the fixed frame 1, the fixed frame 2 is fixedly connected to the middle upper end of the fixed frame 1, a plurality of groups of threaded holes 301 are opened on the fixed plate 3, and the anti-instability mechanism 302 is installed at the bottom of the fixed plate 3, the auxiliary connection mechanism 303 is installed at the top of the fixed plate 3, the first sampling mechanism 4 and The second sampling mechanism 5 is slidably installed inside the two ends of the fixed frame 1, and the first sampling mechanism 4 and the second sampling mechanism 5 have the same structure. The adjusting tooth plate 7 is fixedly connected to the center of the first sampling mechanism 4 and the second sampling mechanism 5. The first adjusting gear 8 is rotatably set at the rear end of the adjusting tooth plate 7. The adjusting tooth plate 7 is meshed with the first adjusting gear 8. The first motor 6 is fixedly connected to the upper end of the first adjusting gear 8. The first motor 6 is fixedly installed on the fixed frame 2. The distance between the first sampling mechanism 4 and the second sampling mechanism 5 can be adjusted and controlled, so that sampling can be performed at different positions on the concrete.

[0062] See also Figure 4 , Figure 5 and Figure 6The first sampling mechanism 4 and the second sampling mechanism 5 both include a sliding adjustment card plate 9, a fixed limit frame 10, a first hydraulic cylinder 11, a second motor 12, a first synchronous belt 13, a synchronous rotating wheel 14, a sliding adjustment plate 15 and a sampling part 16. The synchronous rotating wheel 14 is rotatably installed at the upper right center of the sliding adjustment plate 15. The first synchronous belt 13 rotates at the center of the second motor 12 and the synchronous rotating wheel 14. The sliding adjustment card plate 9 is installed at the left end of the fixed limit frame 10. The fixed limit frame 10 is slidably connected to the sliding adjustment plate 15. The first hydraulic cylinder 11 is evenly fixedly connected to the upper end of the fixed limit frame 10. The sampling part 16 is arranged at the lower end of the fixed limit frame 10. The synchronous rotating wheel 14 can be synchronously rotated by the second motor 12, and the synchronous rotating connecting wheel 26 can be synchronously rotated by the third motor 20.

[0063] See also Figure 6 and Figure 7 The upper end of the sampling portion 16 is fixedly connected with a fixed connection frame 29, and the upper end of the fixed connection frame 29 is fixedly connected with a support table 27. The upper parts of both ends of the support table 27 are fixedly installed with fixed support plates 17. Both sides of the fixed support plate 17 are provided with movable adjustment plates 18. The outer end of the movable adjustment plate 18 is fixedly installed with a connecting cross plate 24. The bottom of the second adjusting gear 28 is rotatably plugged into the movable adjustment plate 18. The synchronously rotating connecting wheel 26 is fixedly connected to the middle part of the upper end of the second adjusting gear 28. The second synchronous belt 23 is rotatably connected between the synchronously rotating connecting wheels 26. The limit fixing plate 21 is fixedly connected Connected to the support table 27, the third motor 20 is fixedly connected to the limit fixing plate 21 by bolts, the movable tooth plate 25 is fixedly connected to the inner side of the connecting cross plate 24, the movable tooth plate 25 is meshingly connected with the second adjusting gear 28, the limit support arm 22 is symmetrically fixedly connected to the upper part of the support table 27, the connecting cross plate 24 is slidably clamped in the inside of the limit support arm 22, and the second hydraulic cylinder 19 can be started to assist the movable adjustment plate 18 to slide outward, so that when the sampling part 16 is inserted deep into the concrete, the movable adjustment plate 34 can be moved so that the blocking column 36 is pulled out from the inside of the sampling groove 35.

[0064] See also Figure 8 and Fig. 9The sampling portion 16 includes a sealing slide 30, a fastening bolt 31, a collection frame 32, a driving rod 33, a movable adjustment plate 34, a sampling slot 35, a blocking column 36, a blocking plate 37, a plug-in cone 38 and a spiral rotation column 39, the plug-in cone 38 is fixedly connected to the bottom end of the collection frame 32, the sampling slots 35 are evenly arranged on the outside of the collection frame 32, the fastening bolts 31 are slidably arranged on the collection frame 32, and the sealing slide 30 is located below the sampling slots 35 at the corresponding position, the fastening bolts 31 are threadedly rotatably installed on the collection frame 32, and the fastening bolts 31 are squeezed and contacted with both sides of the sealing slide 30, and the blocking plate 37 is evenly fixedly installed on the collection frame 32. The inside of the frame 32, and the sealing plate 37 is located above the sampling slot 35 at the corresponding position, the sealing column 36 is fixed in the inside of the sampling slot 35, the movable adjustment plate 34 is fixedly connected to the outer end of the sealing column 36, the spiral rotating column 39 is fixedly installed on the driving rod 33, the driving rod 33 is rotatably installed in the inside of the collecting frame 32, the spiral rotating column 39 is located at the sampling slot 35, the movable adjustment plate 18 moving outward can pull out each sealing column 36 from the inside of the sampling slot 35 through the movable adjustment plate 34, the concrete can enter the inside of the collecting frame 32 through the sampling slot 35, and the concrete sampled at different heights can be blocked by the sealing plate 37.

[0065] The upper end of the movable adjustment plate 34 is fixedly connected to the movable adjustment plate 18, and the movement of the movable adjustment plate 18 can drive the movable adjustment plate 34 to move. The upper end of the driving rod 33 is fixedly connected to the middle of the bottom end of the synchronous rotating wheel 14, and the rotation of the synchronous rotating wheel 14 can drive the driving rod 33 to rotate. The adjusting tooth plate 7 is fixedly connected to the fixed limit frame 10, and the sliding adjustment card plate 9 is slidably connected to the inside of the fixed frame 1, so that the sliding adjustment card plate 9 can adjust the position along the internal sliding of the fixed frame 1. The bottom end of the first hydraulic cylinder 11 is fixedly connected to the upper end of the sliding adjustment plate 15, and the sliding adjustment plate 15 can be controlled to slide and rise and fall inside the fixed limit frame 10 through the first hydraulic cylinder 11.

[0066] When implementing this embodiment, by setting the first sampling mechanism 4 and the second sampling mechanism 5, and the distance between the first sampling mechanism 4 and the second sampling mechanism 5 can be adjusted and controlled, so that sampling can be performed at different positions on the concrete. By symmetrically setting the sampling parts 16 at the bottom of the first sampling mechanism 4 and the second sampling mechanism 5, multi-point synchronous sampling can be completed. By setting the sampling part 16, the sampling part 16 can be used to complete multi-point separated and independent sampling of concrete at different depths, so that the sampling range is wide.

[0067] Example 2

[0068] See also Figure 11-Figure 18, also includes: an anti-instability mechanism and an auxiliary connection mechanism, the anti-instability mechanism 302 includes: a conical connector 41, the conical outer wall of the conical connector 41 is provided with a connecting thread 42, and the conical connector 41 is connected to the threaded hole 301 of the fixing plate 3 through the connecting thread 42, the outer wall of the conical connector 41 is provided with an annular groove 43, and a plurality of groups of fan-shaped units 44 are arranged around the outer wall of the conical connector 41, each group of fan-shaped units 44 includes: two groups of magnetic blocks 45, a T-shaped guide head 46 is fixedly provided on one side of the magnetic block 45 close to the conical connector 41, and the T-shaped guide head 46 is movably arranged in the annular groove 43, an anti-slip handle 47 is fixedly provided on the top of the magnetic block 45, a plurality of groups of connecting blades 48 are movably connected between the two groups of magnetic blocks 45, and the connecting blades 48 are movably connected between each other.

[0069] Preferably, the auxiliary connection mechanism 303 includes: a connection plate 49, a plurality of threaded holes 50 are formed on the connection plate 49, a fixed end of a driving cylinder 52 is fixedly connected to the connection plate 49, an output end of the driving cylinder 52 is fixedly connected to a top plate 55, one end of a first connecting rod 53 is fixedly connected to the connection plate 49, the other end of the first connecting rod 53 is movably penetrated through the top plate 55 and fixedly provided with a limit plate 59, a buffer spring 54 is sleeved on the outer wall of the first connecting rod 53, a damping member 51 is installed between the connection plate 49 and the top plate 55, a shaft sleeve 67 is fixedly connected to the top center of the top plate 55, and a connecting shaft 56 is movably arranged in the shaft sleeve 67, A bending gripper 57 is movably provided at the end of the connecting shaft 56, and a torsion spring is installed at the connection between the connecting shaft 56 and the bending gripper 57, an L-shaped locking plate 58 is fixedly provided at the end of the bending gripper 57 away from the connecting shaft 56, a guide groove 61 is provided on the outer wall of the bending gripper 57, one end of the guide push head 60 is fixedly connected to the limit plate 59, and the other end of the guide push head 60 is movably provided in the guide groove 61, an installation groove 62 is provided on the inner wall of the bending gripper 57, an anti-slip plate 64 is movably connected to the installation groove 62 by an elastic reset plate 63, and a rubber gasket 65 is installed on the anti-slip plate 64, and an anti-slip pattern 66 is provided on the surface of the rubber gasket 65.

[0070] Preferably, a portion of the plurality of groups of threaded holes 301 is tapered for connection with the tapered connector 41 .

[0071] The working principle and beneficial effects of the above technical solution are as follows: when sampling on site, due to the messy construction site and the difficulty in adjusting the lifting mechanism to the required position, after connecting the connecting plate 49 to the fixed plate 3 by bolts, the auxiliary connecting mechanism 303 is installed above the fixed plate 3, and then any scaffolding or supporting structure is found, and two sets of bending grippers 57 are placed there, and the driving cylinder 52 is started to push the top plate 55 to move upward along the four sets of first connecting rods 53. At the same time, the two sets of anti-slip plates 64 will first abut against any scaffolding or supporting structure, and make the two sets of anti-slip plates 64 rotate in the direction close to the installation groove 62 until any scaffolding or supporting structure enters the two sets of bending grippers 57. After that, the two sets of anti-slip plates 64 are reset by the rebound force of the elastic reset sheet 63, thereby forming a structure as shown in the figure. Fig.14 At the same time, the driving cylinder 52 will push the top plate 55 to move upward along the four groups of first connecting rods 53, and because the guide push head 60 is located in the guide groove 61 of the outer wall of the bending gripper 57, when the first connecting rod 53 and the guide push head 60 are stationary, the top plate 55 drives the two groups of bending grippers 57 to move upward, so that the guide push head 60 blocks the two groups of bending grippers 57. At this time, the two groups of bending grippers 57 will move around the connecting shaft 56 in a direction close to each other and close together, thereby holding any scaffolding or supporting structure tightly. The sampling mechanism is installed at the selected sampling position, wherein the setting of the L-shaped locking plate 58 can prevent the anti-slip plate 64 from rotating at too large an angle, thereby supporting and preventing the anti-slip plate 64 from slipping off; the setting of the limit plate 59 serves to limit the rotation angle of the bending gripper 57, thereby ensuring the stability of the sampling mechanism in the horizontal and vertical directions; and the setting of the auxiliary connecting mechanism 303 can be installed on any scaffolding of different diameters or supporting structures, thereby enabling the sampling mechanism to be suitable for different positions and different scenes, thereby increasing practicality.

[0072] On this basis, an anti-instability mechanism 302 is installed at the lower end of the fixed plate 3. Because concrete sometimes needs to be sampled before it solidifies, when sampling on site, the construction site is messy and it is difficult to adjust the lifting mechanism to the required position. In order to prevent the auxiliary connecting mechanism 303 from accidentally falling after installation, at this time, the connecting thread 42 provided on the outer wall of the conical connecting head 41 is screwed into the threaded hole 301 provided on the fixed plate 3 for connection, and then the non-slip handle 47 is gripped to push the two groups of magnetic blocks 45 away from each other, so that the magnetic blocks 45 are rotated along the annular groove 43 of the conical connecting head 41 through the T-shaped guide head 46, and several groups of connecting blades 48 are also rotated and spread out to form fan leaves. Since the two groups of magnetic blocks 45 have opposite magnetic properties, the two groups of magnetic blocks 45 can attract each other when they are close to form a Fig.14In the structure shown in , at this time, after the anti-instability mechanism 302 is tightly held with any scaffold or supporting structure, the sampling mechanism can be directly placed on the concrete surface, and due to the expansion of the anti-instability mechanism 302, the contact area between the sampling mechanism and the concrete surface is increased, so the sampling mechanism will not be greatly sunken during the sampling time, or after the anti-instability mechanism 302 is tightly held with any scaffold or supporting structure, the sampling mechanism is in the air. When an accidental fall occurs, due to the expansion of the anti-instability mechanism 302, the sampling mechanism will not immediately sink into the concrete after falling, and there is enough time for salvage. Among them, the fan-shaped unit 44 is generally arranged in three groups around the conical connector 41, so as to facilitate its opening, and the length of the connecting blade 48 can be changed according to actual conditions, thereby changing the area after the anti-instability mechanism 302 is expanded. The larger the area, the greater the bearing capacity and the more stable it is.

[0073] Example 3

[0074] Based on any one of embodiments 1-2, further comprising a sampling monitoring unit,

[0075] The sampling monitoring unit includes:

[0076] A speed sensor 1, disposed in the sampling portion 16, for detecting a displacement speed of the sampling portion 16;

[0077] A rotation speed sensor 1, arranged on the output shaft of the second motor 12, for detecting the rotation speed of the second motor 12;

[0078] A second speed sensor is provided on the spiral rotating column 39 and is used to detect the rotation speed of the spiral rotating column 39;

[0079] An alarm device is arranged on the outer surface of the fixing frame 2;

[0080] The controller is arranged on the outer surface of the fixing frame 2, and the controller is electrically connected to the speed sensor 1, the rotation speed sensor 1, the rotation speed sensor 2 and the alarm respectively. The controller controls the alarm to work based on the speed sensor 1, the rotation speed sensor 1 and the rotation speed sensor 2, including:

[0081] Step 1: The controller calculates the stability coefficient of the first synchronous belt 13 in long-term use based on the speed sensor 1, the rotation speed sensor 1, the rotation speed sensor 2 and the formula 1:

[0082]

[0083] Among them, X is the stability coefficient of the first synchronous belt 13 in long-term use, V1 is the detection value of the speed sensor 1, n1 is the detection value of the speed sensor 1, n2 is the detection value of the speed sensor 2, r1 is the radius of the output shaft of the second motor 12, r2 is the radius of the spiral rotating column 39, π is 3, 14, L1 is the length of the spiral rotating column 39, L2 is the length of the first synchronous belt 13, μ1 is the friction coefficient between the first synchronous belt 13 and the synchronous rotating wheel 14, is the Poisson's ratio of the material of the first synchronous belt 13, P is the effective stress concentration factor of the first synchronous belt 13, S1 is the surface area of ​​the spiral rotating column 39 penetrating into the concrete, N is the bending section coefficient of the first synchronous belt 13, and ln is the natural logarithm;

[0084] Step 2: Based on step 1, the controller calculates the working state index of the sampling mechanism based on speed sensor 1, rotation speed sensor 1, rotation speed sensor 2 and formula 2:

[0085]

[0086] Wherein, Y is the working state index of the sampling mechanism, μ2 is the friction coefficient between the spiral rotating column 39 and the concrete, is the Poisson's ratio of the material of the first synchronous belt 13, H is the depth of the spiral rotating column 39 penetrating into the concrete, and K is the preset abrasion coefficient of the concrete on the spiral rotating column 39;

[0087] Step 3: The controller compares the working state index of the sampling mechanism with a preset working state index. When the working state index of the sampling mechanism is less than the working state index (0.85), the controller controls the alarm to issue an alarm prompt.

[0088] The working principle and beneficial effects of the above technical solution are as follows: when the first synchronous belt 13 works for a long time, as its service life increases, the risk of fracture will become higher and higher. Since the second motor 12 needs to drive the spiral rotating column 39 to penetrate into the concrete through the first synchronous belt 13, the first synchronous belt 13 will cause the depth of the spiral rotating column 39 to penetrate into the concrete to deviate after long-term wear, resulting in failure to reach the predetermined depth, thereby making the data detected after sampling inaccurate. Therefore, when the first synchronous belt 13 is used for a long time, the speed sensor 1, the speed sensor 1 and the speed sensor 2 are used to detect the displacement speed and rotation speed of each component during the working process. The controller uses formula (1) to obtain the stability coefficient of the first synchronous belt 13 in long-term use and formula (2) to calculate the working state index of the sampling mechanism. When the working state index of the sampling mechanism is less than the working state index (0.85), the controller controls the alarm to issue an alarm prompt to remind the user to detect the sampling mechanism to prevent the sampling mechanism from being damaged, thereby improving the safety and reliability of the mechanism.

[0089] Example 4

[0090] On the basis of Example 1, Fig.10 As shown, the outer wall of the collecting frame 32 is provided with scale lines 40, and the scale lines 40 are arranged in a longitudinal distribution, and the scale lines 40 are used to detect the depth of insertion into concrete.

[0091] When implementing this embodiment, by setting scale lines 40 on the outer wall of the collecting frame 32, it is convenient to observe and know the depth of the collecting frame 32 inserted into the concrete.

[0092] The present invention also provides a concrete multi-point method based on the above concrete multi-point sampling machine, comprising the following steps:

[0093] S1. Connect the mechanism to the external scaffolding through the auxiliary connection mechanism 303. When sampling, first deploy the anti-instability mechanism 302 to make safety preparations, then start the first motor 6 to drive the first adjustment gear 8 to rotate. The rotating first adjustment gear 8 can make the sliding adjustment card plate 9 in the first sampling mechanism 4 and the second sampling mechanism 5 slide along the inside of the fixed frame 1 through the adjustment tooth plate 7, so as to adjust and control the use of the first sampling mechanism 4 and the second sampling mechanism 5 and the sampling interval and position;

[0094] S2, after the sampling interval position of the first sampling mechanism 4 and the second sampling mechanism 5 is adjusted, the first hydraulic cylinder 11 is started to make the second sampling mechanism 5 slide downward along the fixed limit frame 10, and at this time, the sampling part 16 can be inserted into the interior of the concrete in combination with the external lifting mechanism;

[0095] S3, then start the third motor 20 to drive the synchronous rotating connecting wheel 26 to rotate, the synchronous rotating connecting wheels 26 are synchronized through the second synchronous belt 23, the rotating synchronous rotating connecting wheel 26 can drive the second adjusting gear 28 to rotate, the rotating second adjusting gear 28 can push the movable adjusting plate 18 to move outward through the movable tooth plate 25 and the connecting cross plate 24, and the movable adjusting plate 18 moving outward can make each blocking column 36 be pulled out from the inside of the sampling slot 35 through the movable adjusting plate 34;

[0096] S4, and at this time, the second motor 12 is started to drive the synchronous rotating wheel 14 to rotate. The rotating synchronous rotating wheel 14 realizes the synchronous rotation between the synchronous rotating wheels 14 through the first synchronous belt 13. The rotating synchronous rotating wheel 14 can drive the driving rod 33 to rotate. The rotating driving rod 33 can drive the spiral rotating column 39 to rotate. The rotating spiral rotating column 39 forms a vortex at the sampling groove 35, so that the external concrete enters the inside of the collecting frame 32 from the sampling groove 35, and the blocking plate 37 is used to achieve isolation and separation, so that the concrete at different heights inside the collecting frame 32 can flow into different depths. By starting the second hydraulic cylinder 19, the movable adjustment plate 18 can be assisted to slide outward, so that when the sampling part 16 is inserted deep into the concrete, the movable adjustment plate 34 can be moved to pull the blocking column 36 out of the sampling groove 35.

[0097] S5. The sealing slide plate 30 is pulled out by tightening the fastening bolts 31 , so that the concrete sampled at different positions can be sampled from the inner flow of the collecting frame 32 .

[0098] The working principle of the present invention is as follows: the mechanism is connected to the external scaffolding through the auxiliary connection mechanism 303. When sampling, the anti-instability mechanism 302 is first deployed to prepare for safety, and then the first motor 6 is started to drive the first adjusting gear 8 to rotate. The rotating first adjusting gear 8 can make the sliding adjustment card plate 9 in the first sampling mechanism 4 and the second sampling mechanism 5 slide along the inside of the fixed frame 1 through the adjustment tooth plate 7, so as to adjust and control the use and sampling spacing and position of the first sampling mechanism 4 and the second sampling mechanism 5. After the sampling spacing position of the first sampling mechanism 4 and the second sampling mechanism 5 is adjusted, the first hydraulic cylinder 11 is started to make the second sampling mechanism 5 move along the fixed limit frame 10 to The sampling part 16 can be inserted into the concrete by combining with the external lifting mechanism, and then the third motor 20 is started to drive the synchronous rotating connecting wheel 26 to rotate. The synchronous rotating connecting wheels 26 are synchronously rotated by the second synchronous belt 23. The rotating synchronous rotating connecting wheel 26 can drive the second adjusting gear 28 to rotate. The rotating second adjusting gear 28 can push the movable adjusting plate 18 to move outward through the movable tooth plate 25 and the connecting cross plate 24. The movable adjusting plate 18 moving outward can make each blocking column 36 be pulled out from the inside of the sampling slot 35 through the movable adjusting plate 34. At this time, the second motor 12 is started to drive the synchronous rotating wheel 14 to rotate. The rotating wheel 14 is rotated synchronously by the first synchronous belt 13. The rotating synchronous rotating wheel 14 can drive the driving rod 33 to rotate. The rotating driving rod 33 can drive the spiral rotating column 39 to rotate. The rotating spiral rotating column 39 forms a vortex at the sampling groove 35, so that the external concrete enters the inside of the collecting frame 32 from the sampling groove 35, and is blocked and separated by the blocking plate 37, so that different heights of the inside of the collecting frame 32 can flow into the concrete of different depths. By starting the second hydraulic cylinder 19, the movable adjustment plate 18 can be assisted to slide outward, so that when the sampling part 16 is inserted into the deep concrete, the movable adjustment plate 34 can be moved so that the blocking column 36 can be moved from the sampling groove 35 to the inside of the collecting frame 32. The sealing slide plate 30 is pulled out from the inside of the groove 35 by screwing the fastening bolts 31, so that the concrete at different positions can be sampled from the internal flow of the collecting frame 32. The mechanism is provided with a first sampling mechanism 4 and a second sampling mechanism 5, and the spacing between the first sampling mechanism 4 and the second sampling mechanism 5 can be adjusted and controlled, so that different positions on the concrete can be sampled. By symmetrically arranging the sampling parts 16 at the bottom of the first sampling mechanism 4 and the second sampling mechanism 5, multi-point synchronous sampling can be completed. By arranging the sampling parts 16, the sampling parts 16 can be used to complete multi-point separated independent sampling of concrete at different depths, so that the sampling range is wide.

[0099] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A concrete multi-point sampling machine, comprising a fixed frame (1), a fixed frame (2), a fixed plate (3), an anti-instability mechanism (302), an auxiliary connection mechanism (303), a first sampling mechanism (4), a second sampling mechanism (5), a first motor (6), an adjustment tooth plate (7) and a first adjustment gear (8), characterized in that: The fixing plate (3) is fixedly connected to the middle of both sides of the fixing frame (1), the fixing frame (2) is fixedly connected to the middle upper end of the fixing frame (1), a plurality of threaded holes (301) are opened on the fixing plate (3), and an anti-instability mechanism (302) is installed at the bottom of the fixing plate (3), and an auxiliary connection mechanism (303) is installed at the top of the fixing plate (3). The first sampling mechanism (4) and the second sampling mechanism (5) are slidably installed inside the two ends of the fixing frame (1), and the first sampling mechanism (4) and the second sampling mechanism (5) have the same structure. The adjusting tooth plate (7) is fixedly connected to the center of the first sampling mechanism (4) and the second sampling mechanism (5), and the first adjusting gear (8) is rotatably arranged at the rear end of the adjusting tooth plate (7), and the adjusting tooth plate (7) is meshedly connected with the first adjusting gear (8). The first motor (6) is fixedly connected to the upper end of the first adjusting gear (8), and the first motor (6) is fixedly installed on the fixing frame (2).

2. The concrete multi-point sampling machine according to claim 1, characterized in that: The first sampling mechanism (4) and the second sampling mechanism (5) both comprise a sliding adjustment card plate (9), a fixed limit frame (10), a first hydraulic cylinder (11), a second motor (12), a first synchronous belt (13), a synchronous rotating wheel (14), a sliding adjustment plate (15) and a sampling portion (16); the synchronous rotating wheel (14) is rotatably mounted at the center of the upper right side of the sliding adjustment plate (15); the first synchronous belt (13) rotates at the center of the second motor (12) and the synchronous rotating wheel (14); the sliding adjustment card plate (9) is mounted at the left end of the fixed limit frame (10); the fixed limit frame (10) is slidably clamped on the sliding adjustment plate (15); the first hydraulic cylinder (11) is evenly and fixedly connected to the upper end of the fixed limit frame (10); and the sampling portion (16) is arranged at the lower end of the fixed limit frame (10).

3. The concrete multi-point sampling machine according to claim 2 is characterized in that: The first sampling mechanism (4) also includes a third motor (20), a limit fixing plate (21), a limit support arm (22), a second synchronous belt (23), a movable tooth plate (25), a synchronously rotating connecting wheel (26), a second adjusting gear (28) and a fixed connection frame (29); the upper end of the sampling portion (16) is fixedly connected to the fixed connection frame (29); the upper end of the fixed connection frame (29) is fixedly connected to a support table (27); the upper parts of both ends of the support table (27) are fixedly mounted with fixed support plates (17); both sides of the fixed support plate (17) are provided with movable adjustment plates (18); the outer end of the movable adjustment plate (18) is fixedly mounted with a connecting transverse plate (24); the bottom of the second adjusting gear (28) is rotatably plugged into the movable adjustment plate (18), the synchronously rotating connecting wheel (26) is fixedly connected to the middle part of the upper end of the second adjusting gear (28), the second synchronous belt (23) is rotatably clamped between the synchronously rotating connecting wheels (26), the limit fixing plate (21) is fixedly connected to the movable adjusting plate (18), the third motor (20) is fixedly connected to the limit fixing plate (21) by bolts, the movable tooth plate (25) is fixedly connected to the inner side of the connecting transverse plate (24), the movable tooth plate (25) and the second adjusting gear (28) are meshedly connected, the limit support arm (22) is symmetrically fixedly connected to the upper part of the support table (27), the connecting transverse plate (24) is slidably clamped inside the limit support arm (22), and fixed connection frames (29) are fixedly installed at both ends of the support table (27).

4. The concrete multi-point sampling machine according to claim 3 is characterized in that: The sampling part (16) comprises a sealing plate (30), a fastening bolt (31), a collection frame (32), a driving rod (33), a movable adjustment plate (34), a sampling slot (35), a blocking column (36), a blocking plate (37), a plugging cone (38) and a spiral rotating column (39), wherein the plugging cone (38) is fixedly connected to the bottom end of the collection frame (32), the sampling slot (35) is evenly arranged on the outside of the collection frame (32), the fastening bolt (31) is slidably arranged on the collection frame (32), and the sealing plate (30) is located below the sampling slot (35) at the corresponding position, and the fastening bolt (31) is threaded. The sealing plate (37) is evenly fixedly mounted on the collecting frame (32), and the fastening bolts (31) are in extrusion contact with the two sides of the sealing slide plate (30). The sealing plate (37) is evenly fixedly mounted inside the collecting frame (32), and the sealing plate (37) is located above the sampling slot (35) at the corresponding position. The sealing column (36) is fixed inside the sampling slot (35), and the movable adjustment plate (34) is fixedly connected to the outer end of the sealing column (36). The spiral rotating column (39) is fixedly mounted on the driving rod (33), and the driving rod (33) is rotatably mounted inside the collecting frame (32). The spiral rotating column (39) is located at the sampling slot (35).

5. The concrete multi-point sampling machine according to claim 4 is characterized in that: The upper end of the movable adjustment plate (34) is fixedly connected to the movable adjustment plate (18), the upper end of the driving rod (33) is fixedly connected to the middle of the bottom end of the synchronous rotating wheel (14), the adjustment tooth plate (7) is fixedly connected to the fixed limit frame (10), the sliding adjustment clamping plate (9) is slidably clamped inside the fixed frame (1), and the bottom end of the first hydraulic cylinder (11) is fixedly connected to the upper end of the sliding adjustment plate (15).

6. A concrete multi-point sampling machine according to claim 5, characterized in that: The outer wall of the collecting frame (32) is provided with scale lines (40), and the scale lines (40) are arranged in a longitudinal distribution. The scale lines (40) are used to detect the depth of the collecting frame (32) inserted into concrete.

7. The concrete multi-point sampling machine according to claim 6, characterized in that: The anti-instability mechanism (302) comprises: a conical connector (41), a connecting thread (42) is provided on the conical outer wall of the conical connector (41), and the conical connector (41) is connected to a threaded hole (301) of a fixing plate (3) through the connecting thread (42), an annular groove (43) is provided on the outer wall of the conical connector (41), and a plurality of groups of fan-shaped units (44) are provided around the outer wall of the conical connector (41), and each group of fan-shaped units (44) comprises: two groups of magnetic blocks (45), a T-shaped guide head (46) is fixedly provided on one side of the magnetic block (45) close to the conical connector (41), and the T-shaped guide head (46) is movably arranged in the annular groove (43), an anti-slip handle (47) is fixedly provided on the top of the magnetic block (45), and a plurality of groups of connecting blades (48) are movably connected between the two groups of magnetic blocks (45), and the connecting blades (48) are movably connected to each other.

8. The concrete multi-point sampling machine according to claim 7, characterized in that: The auxiliary connection mechanism (303) comprises: a connection plate (49), a plurality of threaded holes (50) are provided on the connection plate (49), a fixed end of a driving cylinder (52) is fixedly connected to the connection plate (49), an output end of the driving cylinder (52) is fixedly connected to a top plate (55), one end of a first connecting rod (53) is fixedly connected to the connection plate (49), the other end of the first connecting rod (53) is movably connected to a limit plate (59) which penetrates the top plate (55) and is fixedly provided with the limit plate (59), a buffer spring (54) is sleeved on the outer wall of the first connecting rod (53), a damping member (51) is installed between the connection plate (49) and the top plate (55), a shaft sleeve (67) is fixedly connected to the top center of the top plate (55), and a connecting shaft (56) is movably provided in the shaft sleeve (67), and a connecting member (51) is provided between the connection plate (49) and the top plate (55). A bending gripper (57) is movably provided at the end of the shaft (56), and a torsion spring is installed at the connection between the connecting shaft (56) and the bending gripper (57). An L-shaped locking plate (58) is fixedly provided at one end of the bending gripper (57) away from the connecting shaft (56). A guide groove (61) is provided on the outer wall of the bending gripper (57). One end of a guide pusher (60) is fixedly connected to a limit plate (59), and the other end of the guide pusher (60) is movably provided in the guide groove (61). An installation groove (62) is provided on the inner wall of the bending gripper (57). An anti-slip plate (64) is movably connected to the installation groove (62) via an elastic reset plate (63), and a rubber gasket (65) is installed on the anti-slip plate (64), and a surface of the rubber gasket (65) is provided with anti-slip grooves (66).

9. The concrete multi-point sampling machine according to claim 8, characterized in that: It also includes a sampling monitoring unit, which includes: A speed sensor 1, arranged in the sampling portion (16), and used for detecting the displacement speed of the sampling portion (16); A first rotation speed sensor, arranged on the output shaft of the second motor (12), for detecting the rotation speed of the second motor (12); A second rotation speed sensor, arranged on the spiral rotating column (39), for detecting the rotation speed of the spiral rotating column (39); An alarm device is arranged on the outer surface of the fixing frame (2); The controller is arranged on the outer surface of the fixing frame (2), and the controller is electrically connected to the speed sensor 1, the rotation speed sensor 1, the rotation speed sensor 2 and the alarm respectively. The controller controls the alarm to work based on the speed sensor 1, the rotation speed sensor 1 and the rotation speed sensor 2, and includes: Step 1: The controller calculates the stability coefficient of the first synchronous belt (13) in long-term use based on the speed sensor 1, the rotation speed sensor 1 and the rotation speed sensor 2 and the formula (1): Wherein, X is the stability coefficient of the first synchronous belt (13) in long-term use, V1 is the detection value of the speed sensor 1, n1 is the detection value of the speed sensor 1, n2 is the detection value of the speed sensor 2, r1 is the radius of the output shaft of the second motor (12), r2 is the radius of the spiral rotating column (39), π is 3, 14, L1 is the length of the spiral rotating column (39), L2 is the length of the first synchronous belt (13), μ1 is the friction coefficient between the first synchronous belt (13) and the synchronous rotating wheel (14), is the Poisson's ratio of the material of the first synchronous belt (13), P is the effective stress concentration factor of the first synchronous belt (13), S1 is the surface area of ​​the spiral rotating column (39) penetrating into the concrete, N is the bending section coefficient of the first synchronous belt (13), and ln is the natural logarithm; Step 2: Based on step 1, the controller calculates the working state index of the sampling mechanism based on speed sensor 1, rotation speed sensor 1, rotation speed sensor 2 and formula (2): Wherein, Y is the working state index of the sampling mechanism, μ2 is the friction coefficient between the spiral rotating column (39) and the concrete, is the Poisson's ratio of the material of the first synchronous belt (13), H is the depth of the helical rotating column (39) penetrating into the concrete, and K is the preset abrasion coefficient of the concrete on the helical rotating column (39); Step 3: The controller compares the working state index of the sampling mechanism with a preset working state index. When the working state index of the sampling mechanism is less than the working state index (0.85), the controller controls the alarm to issue an alarm prompt.

10. A concrete multi-point method based on the concrete multi-point sampling machine according to any one of claims 1 to 9, characterized in that: The steps include: S1. The mechanism is connected to an external scaffold through an auxiliary connection mechanism (303). When sampling, the anti-instability mechanism (302) is first deployed to make safety preparations, and then the first motor (6) is started to drive the first adjustment gear (8) to rotate. The rotating first adjustment gear (8) can make the sliding adjustment card plate (9) in the first sampling mechanism (4) and the second sampling mechanism (5) slide along the inside of the fixed frame (1) through the adjustment tooth plate (7), so as to adjust and control the use of the first sampling mechanism (4) and the second sampling mechanism (5) and the sampling interval and position; S2. After the sampling intervals of the first sampling mechanism (4) and the second sampling mechanism (5) are adjusted, the first hydraulic cylinder (11) is started to allow the second sampling mechanism (5) to slide downward along the fixed limit frame (10). At this time, the sampling portion (16) can be inserted into the interior of the concrete in combination with the external lifting mechanism; S3, then start the third motor (20) to drive the synchronously rotating connecting wheel (26) to rotate, the synchronously rotating connecting wheels (26) are synchronized through the second synchronous belt (23), the rotating synchronously rotating connecting wheel (26) can drive the second adjusting gear (28) to rotate, the rotating second adjusting gear (28) can push the movable adjusting plate (18) to move outward through the movable tooth plate (25) and the connecting cross plate (24), and the movable adjusting plate (18) moving outward can make each blocking column (36) be pulled out from the inside of the sampling slot (35) through the movable adjusting plate (34); S4, and at this time, the second motor (12) is started to drive the synchronous rotating wheel (14) to rotate. The rotating synchronous rotating wheel (14) realizes the synchronous rotation between the synchronous rotating wheels (14) through the first synchronous belt (13). The rotating synchronous rotating wheel (14) can drive the driving rod (33) to rotate. The rotating driving rod (33) can drive the spiral rotating column (39) to rotate. The rotating spiral rotating column (39) forms a vortex at the sampling groove (35), so that the external concrete enters the inside of the collection frame (32) from the sampling groove (35), and the blocking plate (37) is used to achieve isolation and separation, so that different heights inside the collection frame (32) can flow into concrete of different depths. By starting the second hydraulic cylinder (19), the movable adjustment plate (18) can be assisted to slide outward, so that when the sampling part (16) is inserted deep into the concrete, the movable adjustment plate (34) can be moved to pull the blocking column (36) out of the sampling groove (35); S5. The sealing slide plate (30) is pulled out by tightening the fastening bolts (31), so that the concrete sampled at different positions can be sampled from the inner flow of the collecting frame (32).

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