Concrete sampling and detecting device

Abstract

The utility model discloses a concrete sampling and detecting device, relates to the technical field of engineering detection equipment, and aims to solve the problems that when concrete in a sampling pipe is taken out, the opening of the sampling pipe is easily blocked, the concrete in the sampling pipe cannot be taken out, and the normal use of the sampling pipe is influenced. According to the technical scheme, the sampling device is characterized by comprising a sampling pipe and a screw rod, the sampling pipe comprises a storage frame and a fixing ring which are in threaded connection with each other, the fixing ring is rotationally connected with the screw rod, a first cavity and a second cavity are formed in the storage frame, a first motor is fixedly connected into the first cavity, and a rotating rod is rotationally connected into the second cavity. According to the concrete sampling device, through the second driving assembly, concrete in the storage frame can be taken out without manual operation of a worker, the situation that normal use of the sampling pipe is affected due to the fact that the concrete is blocked in the sampling pipe is avoided, meanwhile, concrete residues in the sampling pipe can be avoided, and the follow-up concrete detection precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of engineering testing equipment technology, and more specifically, it relates to a concrete sampling and testing device. Background Technology

[0002] During the construction process, in order to ensure the quality of the project, after completion, the staff usually conducts inspections on the project. The inspections include engineering inspections of the foundation and on-site inspections of the main structure. On-site inspections of the main structure usually involve sampling and testing the strength of concrete, mortar, and masonry.

[0003] CN220932420U discloses a concrete sampling device for concrete testing. The technical solution includes a sampling tube, a suction tube fixedly installed at the lower end of the sampling tube, a first telescopic rod fixedly installed on the left side of the lower end of the suction tube, a connecting block fixedly installed at the lower end of the first telescopic rod, a stop block fixedly installed on the right side of the connecting block, a blocking block fixedly installed at the upper end of the stop block, and a pointed post fixedly installed at the lower end of the stop block. The connecting block is fixedly installed through the first telescopic rod, the connecting block is equipped with the stop block, and the stop block is equipped with the blocking block.

[0004] The above-mentioned technical solution uses a first telescopic rod to automatically move the block, which facilitates the automatic closing and opening of the suction tube, thus facilitating the suction of concrete. Furthermore, the pointed pile and inclined surface facilitate the downward movement of the sampling tube, reducing resistance from the concrete. The second telescopic rod also allows for automatic downward movement of the sampling tube, avoiding the inconvenience of manual movement. However, when removing concrete from the sampling tube, excessive concrete can easily cause blockage at the opening. Since the above-mentioned technical solution does not include an anti-blocking structure inside the sampling tube, the concrete cannot be removed, affecting the normal use of the sampling tube.

[0005] Therefore, a new solution is needed to address this problem. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a concrete sampling and testing device that solves the problem that when taking out concrete from the sampling tube, the opening of the sampling tube is easily blocked, making it impossible to remove the concrete and affecting the normal use of the sampling tube.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a concrete sampling and testing device, comprising a sampling tube and a spiral rod, wherein the sampling tube comprises a storage frame and a fixing ring threadedly connected to each other, the fixing ring and the spiral rod being rotatably connected, the storage frame having a first chamber and a second chamber, a motor being fixedly connected to the first chamber, and a rotating rod being rotatably connected to the second chamber, the rotating rod penetrating into the first chamber and being detachably connected to the output end of the first motor, wherein when the fixing ring and the storage frame are engaged, the spiral rod and the rotating rod are engaged, and at this time the rotating rod and the output end of the first motor are connected, the first chamber having a first driving component for driving the rotating rod to separate from the output end of the first motor, the storage frame having a second driving component for removing concrete from the second chamber, and a corrugated pipe being fixedly connected to the end of the fixing ring away from the storage frame.

[0008] By adopting the above technical solution, when concrete sampling is required, the fixing ring and one end of the sampling tube are installed together, and the screw rod and rotating rod are engaged with each other. At this time, the rotating rod, under the influence of the screw rod, begins to move in the direction of motor one, and drives the rotating rod and the output end of motor one to connect and fix together. Then, motor one is started, and the output end of motor one drives the rotating rod to start rotating. At the same time, the rotating rod drives the screw rod to rotate, and the screw rod can sample the concrete. The sampled concrete will fall into the corrugated pipe, and the corrugated pipe can transport the fallen concrete into chamber two, thus completing the concrete sampling. When it is necessary to remove the concrete from chamber two, the fixing ring and the storage frame are removed together. At this time, the first drive component can drive the rotating rod back to its original position, and drive the rotating rod and the output end of motor one to separate. Then, the second drive component can remove the concrete from chamber two. With the setting of the second drive component, the concrete in the storage frame can be removed without manual operation, avoiding concrete blockage in the sampling tube and avoiding affecting the normal use of the sampling tube.

[0009] The present invention is further configured such that: the second driving assembly includes a movable plate slidably connected to the rotating rod, the movable plate being slidably connected to the inner wall of the second chamber, the inner wall of the second chamber being provided with a threaded strip for threaded connection of the movable plate, when the movable plate and the threaded strip are in contact with each other, the rotating rod and the output end of the first motor are separated from each other, the rotating rod located in the second chamber has a rectangular cross-section, the side wall of the rotating rod is fixedly connected with a limiting block that is in contact with the movable plate, the first chamber is provided with a driving component for driving the movable plate to move along the side wall of the threaded strip, when the storage frame and the fixing ring are separated from each other, the output end of the rotating rod and the first motor are separated from each other and the movable plate and the threaded strip are in contact with each other.

[0010] By adopting the above technical solution, when it is necessary to remove the concrete from the storage box, the first driving component drives the rotating rod to move, and at the same time drives the rotating rod and the output end of the motor to separate from each other. At this time, the rotating rod will drive the moving plate to move through the limiting block, and drive the moving plate and the threaded strip to be threaded together. At this time, the driving component can drive the rotating rod to rotate. Since the rotating rod in the second chamber has a rectangular cross-section, the rotating rod can drive the moving plate to rotate. At this time, the moving plate is affected by the threaded strip and begins to move along the side wall of the second chamber, and at the same time removes the concrete in the second chamber. This achieves the effect of removing the concrete from the second chamber. The setting of the moving plate can prevent the concrete in the second chamber from blocking, which is convenient for the normal use of the storage box. At the same time, the setting of the limiting block can drive the moving plate to move when the rotating rod moves, so as not to affect normal use. After the concrete is removed, the driving component drives the rotating rod to rotate again, and at the same time drives the moving plate to rotate and disconnects the threaded connection with the threaded strip. At this time, the moving plate is no longer restricted and can slide between the limiting block and the threaded strip, which is convenient for secondary sampling of concrete.

[0011] The present invention is further configured such that: the driving component includes a second motor and two gears fixedly connected to the first chamber; the output end of the second motor and the side wall of the rotating rod are respectively fixedly connected to the two gears; when the two gears mesh with each other, the limiting block drives the moving plate to move and is threadedly connected to the threaded strip; when the rotating rod and the output end of the first motor are connected to each other, the two gears are separated.

[0012] By adopting the above technical solution, when the rotating rod and the output end of motor one are separated from each other, the rotating rod will drive the two gears to mesh with each other, and then start motor two, which will drive the two gears to rotate, and drive the rotating rod to rotate, thereby achieving the effect of driving the rotating rod to rotate.

[0013] The present invention is further configured such that a limiting ring is fixedly connected to the side of the second chamber near the fixing ring.

[0014] By adopting the above technical solution, it is possible to avoid the moving plate separating from the second chamber when it moves along the second side wall of the chamber, thereby improving the stability of the moving plate during movement.

[0015] The present invention is further configured such that: the first driving component includes a movable ring located in a chamber, the movable ring and the rotating rod are connected by a connecting rod, the connecting rod and the rotating rod are rotatably connected, a sliding groove is provided on the inner side wall of the chamber for the movable ring to slide, the movable ring and the sliding groove are connected by a spring, when the spring is in its natural state the rotating rod and the output end of the motor are separated from each other, when the storage frame and the fixed ring are engaged with each other the spring is in a deformed and compressed state.

[0016] By adopting the above technical solution, when the rotating rod moves in the direction of motor one, the rotating rod will drive the moving ring to move along the slide groove through the connecting rod, and at the same time drive the spring to start to deform and compress. When the rotating rod and the screw rod separate from each other, the spring loses its restriction and begins to deform and recover, and drives the moving ring back to its original position. At the same time, the moving ring drives the rotating rod back to its original position through the connecting rod, thereby achieving the effect of driving the rotating rod back to its original position.

[0017] The present invention is further configured such that: a rotating ring is rotatably connected to the inner side wall of the fixed ring; the inner side wall of the rotating ring and the spiral rod are fixedly connected by a plurality of fixed rods; a locking block is fixedly connected to one end of the spiral rod near the rotating rod; and a slot for the locking block to engage is provided at one end of the rotating rod; when the locking block and the slot engage with each other, the storage frame and the fixed ring engage with each other, and at this time the rotating rod and the output end of the motor are connected to each other.

[0018] By adopting the above technical solution, when the fixing ring and the storage frame are installed together, the locking block on the screw rod is driven to insert into the slot, and then pressure is applied to the fixing ring, causing the fixing ring and the storage frame to contact each other. At the same time, the screw rod drives the rotating rod to move. When the fixing ring and the storage frame are in contact, they are locked together, thus completing the installation of the fixing ring and the storage frame. At the same time, by setting the rotating ring and the fixing rod, the fixing effect between the screw rod and the fixing ring can be improved while the screw rod and the fixing ring are rotated, preventing the screw rod and the fixing ring from separating and improving the stability between the screw rod and the fixing ring.

[0019] The present invention is further configured such that: a positioning block is fixedly connected to the output end of the motor, and a positioning groove is provided at one end of the rotating rod for the positioning block to be inserted. The positioning block is arranged in the form of a pyramid, and when the storage frame and the fixing ring are connected to each other, the positioning block and the positioning groove fit together.

[0020] By adopting the above technical solution, when the rotating rod and the output end of motor one come into contact with each other, the positioning block can drive the output end of motor one to rotate the rotating rod. At the same time, the inclined surface of the pyramid of the positioning block can facilitate the positioning of the rotating rod and the output end of motor one, thereby improving stability.

[0021] In summary, this utility model has the following beneficial effects: When it is necessary to remove the concrete from the second chamber, the fixing ring and the storage frame are disassembled. At this time, the first drive assembly can drive the rotating rod back to its original position, and at the same time drive the rotating rod and the output end of the motor to separate from each other. Then, the second drive assembly can remove the concrete from the second chamber. With the setting of the second drive assembly, the concrete in the storage frame can be removed without manual intervention by the staff, avoiding the blockage of the sampling tube by the concrete and avoiding affecting the normal use of the sampling tube. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the storage frame and the fixing ring in this utility model;

[0023] Figure 2 This is a cross-sectional view of the storage frame and fixing ring in this utility model;

[0024] Figure 3 for Figure 2 Enlarged view of point A;

[0025] Figure 4 This is a schematic diagram of the storage frame in this utility model;

[0026] Figure 5 This is a cross-sectional view of the storage frame in this utility model;

[0027] Figure 6 This is a contact diagram of the spiral rod, fixed ring, rotating ring, fixed rod, and locking block in this utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the motor and the positioning block in this utility model.

[0029] In the diagram: 1. Screw rod; 2. Storage frame; 3. Fixing ring; 4. Chamber 1; 5. Chamber 2; 6. Motor 1; 7. Rotating rod; 8. Bellows; 9. Moving plate; 10. Threaded strip; 11. Limiting block; 12. Motor 2; 13. Gear; 14. Limiting ring; 15. Moving ring; 16. Connecting rod; 17. Slide groove; 18. Spring; 19. Rotating ring; 20. Fixing rod; 21. Locking block; 22. Locking groove; 23. Positioning block; 24. Positioning groove. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0031] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] A concrete sampling and testing device, such as Figures 1-7 As shown, the device includes a sampling tube and a screw rod 1. The sampling tube includes a storage frame 2 and a fixing ring 3 that are threaded together. The fixing ring 3 and the screw rod 1 are rotatably connected. The storage frame 2 has a first chamber 4 and a second chamber 5. A motor 6 is fixedly connected to the first chamber 4. A rotating rod 7 is rotatably connected to the second chamber 5. The rotating rod 7 passes through the first chamber 4 and is detachably connected to the output end of the motor 6. When the fixing ring 3 and the storage frame 2 are engaged, the screw rod 1 and the rotating rod 7 are engaged, and at this time, the rotating rod 7 and the output end of the motor 6 are connected to each other. The first chamber 4 is provided with a first drive assembly for driving the rotating rod 7 to separate from the output end of the motor 6. The storage frame 2 is provided with a second drive assembly for removing the concrete from the second chamber 5. A corrugated pipe 8 is fixedly connected to the end of the fixing ring 3 away from the storage frame 2.

[0034] When concrete sampling is required, the fixing ring 3 and one end of the sampling tube are installed together, and the screw rod 1 and rotating rod 7 are simultaneously engaged. At this time, the rotating rod 7, influenced by the screw rod 1, begins to move towards the motor 6, and the output end of the rotating rod 7 and motor 6 are connected and fixed together. Then, motor 6 is started, and its output end drives the rotating rod 7 to rotate. Simultaneously, the rotating rod 7 drives the screw rod 1 to rotate, allowing concrete to be sampled. The sampled concrete falls into the corrugated pipe 8, through which it can be... The fallen concrete is transported into chamber 2, 5, to complete the concrete sampling. When it is necessary to remove the concrete from chamber 2, the fixing ring 3 and the storage frame 2 are disassembled. At this time, the first drive assembly can drive the rotating rod 7 back to its original position, and at the same time drive the rotating rod 7 and the output end of the motor 1 6 to separate from each other. Then, the second drive assembly can remove the concrete from chamber 2. With the setting of the second drive assembly, the concrete in the storage frame 2 can be removed without the need for manual operation, avoiding the blockage of concrete in the sampling tube and avoiding affecting the normal use of the sampling tube.

[0035] like Figures 1-7 As shown, the second drive assembly includes a movable plate 9 slidably connected to the rotating rod 7. The movable plate 9 is slidably connected to the inner wall of the second chamber 5. The inner wall of the second chamber 5 is provided with a threaded strip 10 for threaded connection of the movable plate 9. When the movable plate 9 and the threaded strip 10 are in contact with each other, the rotating rod 7 and the output end of the motor 6 are separated from each other. The rotating rod 7 located in the second chamber 5 has a rectangular cross-section. A limiting block 11 that is in contact with the movable plate 9 is fixedly connected to the side wall of the rotating rod 7. The first chamber 4 is provided with a mechanism for driving the movable plate 9 to move along the side wall of the threaded strip 10. The driving component includes a second motor 12 and two gears 13, which are fixedly connected in the chamber 4. The output end of the second motor 12 and the side wall of the rotating rod 7 are respectively fixedly connected to the two gears 13. When the two gears 13 mesh with each other, the limiting block 11 drives the moving plate 9 to move and is threadedly connected to the threaded strip 10. When the output end of the rotating rod 7 and the output end of the first motor 6 are connected to each other, the two gears 13 are separated.

[0036] When it is necessary to remove the concrete from the storage box 2, the first drive assembly drives the rotating rod 7 to move, and at the same time drives the output end of the rotating rod 7 and the motor 6 to separate. At this time, the rotating rod 7 drives the two gears 13 to mesh with each other. At the same time, the rotating rod 7 drives the moving plate 9 to move through the limit block 11, and drives the moving plate 9 and the threaded strip 10 to be threaded together. At this time, the motor 12 is started, and the motor 12 drives the two gears 13 to rotate, and the two gears 13 drive the rotating rod 7 to rotate. Since the rotating rod 7 located in the second chamber 5 has a rectangular cross section, the rotating rod 7 can drive the moving plate 9 to rotate. At this time, the moving plate 9 is affected by the threaded strip 10 and begins to move along the side wall of the second chamber 5, and removes the concrete from the second chamber 5. This achieves the effect of removing the concrete from the second chamber 5. The setting of the moving plate 9 can prevent the concrete in the second chamber 5 from blocking, which is convenient for the normal use of the storage box 2. At the same time, the setting of the limit block 11 can drive the moving plate 9 to move when the rotating rod 7 moves, so as not to affect the normal use.

[0037] After the concrete is removed, the rotating rod 7 is driven to rotate again by the motor 12, which in turn drives the moving plate 9 to rotate and disconnects the threaded connection with the threaded strip 10. At this time, the moving plate 9 is no longer restricted and can slide between the limiting block 11 and the threaded strip 10, which facilitates secondary sampling of the concrete. The limiting ring 14 is fixedly connected to the side of the chamber 5 near the fixing ring 3, which can prevent the moving plate 9 from separating from the chamber 5 when it moves along the side wall of the chamber 5, thus improving the stability of the moving plate 9 during movement.

[0038] like Figures 1-7 As shown, the first drive assembly includes a movable ring 15 located in chamber 4. The movable ring 15 and the rotating rod 7 are connected by a connecting rod 16, which is rotatably connected to the rotating rod 7. A groove 17 is provided on the inner side wall of chamber 4 for the movable ring 15 to slide. The movable ring 15 and the groove 17 are connected by a spring 18. When the spring 18 is in its natural state, the rotating rod 7 and the output end of the motor 6 are separated. When the storage frame 2 and the fixed ring 3 are engaged, the spring 18 is in a deformed and compressed state. When the rotating rod 7 moves toward the motor 6, the rotating rod 7 will drive the movable ring 15 to move along the groove 17 through the connecting rod 16, and at the same time drive the spring 18 to deform and compress. When the rotating rod 7 and the screw rod 1 are separated, the spring 18 loses its restraint and begins to deform and recover, and drives the movable ring 15 back to its original position. At the same time, the movable ring 15 drives the rotating rod 7 back to its original position through the connecting rod 16, thereby achieving the effect of driving the rotating rod 7 back to its original position.

[0039] like Figures 1-7As shown, a rotating ring 19 is rotatably connected to the inner wall of the fixed ring 3. The inner wall of the rotating ring 19 and the screw rod 1 are fixedly connected by several fixed rods 20. A locking block 21 is fixedly connected to one end of the screw rod 1 near the rotating rod 7. A slot 22 is provided at one end of the rotating rod 7 for the locking block 21 to engage. When the locking block 21 and the slot 22 engage with each other, the storage frame 2 and the fixed ring 3 engage with each other. At this time, the rotating rod 7 and the output end of the motor 6 are connected to each other. When the fixed ring 3 and the storage frame 2 are installed together, the locking block 21 on the screw rod 1 is driven to insert into the slot 22, and then the fixed ring 3 is engaged with the screw rod 1. 3. Apply pressure to drive the fixing ring 3 and the storage frame 2 into contact with each other. At the same time, the screw rod 1 drives the rotating rod 7 to move. When the fixing ring 3 and the storage frame 2 are in contact with each other, the fixing ring 3 and the storage frame 2 are locked together, thus completing the installation of the fixing ring 3 and the storage frame 2. At the same time, the setting of the rotating ring 19 and the fixing rod 20 can improve the fixing effect between the screw rod 1 and the fixing ring 3 while rotating the screw rod 1 and the fixing ring 3, prevent the screw rod 1 and the fixing ring 3 from separating from each other, and improve the stability between the screw rod 1 and the fixing ring 3.

[0040] like Figures 1-7 As shown, a positioning block 23 is fixedly connected to the output end of motor 6. A positioning groove 24 for the positioning block 23 to be inserted is provided at one end of the rotating rod 7. The positioning block 23 is set in a pyramidal shape. When the storage frame 2 and the fixing ring 3 are connected to each other, the positioning block 23 and the positioning groove 24 fit together. When the rotating rod 7 and the output end of motor 6 are in contact with each other, the positioning block 23 can drive the output end of motor 6 to drive the rotating rod 7 to rotate. At the same time, the inclined surface of the pyramid of the positioning block 23 can facilitate the positioning of the rotating rod 7 and the output end of motor 6, thereby improving stability.

[0041] When this utility model is in normal use, it is as follows: When it is necessary to sample concrete, the fixing ring 3 and one end of the sampling tube are installed together, and the screw rod 1 and the rotating rod 7 are driven to engage with each other. At this time, the rotating rod 7 is affected by the screw rod 1 and begins to move towards the motor 6, and drives the output end of the rotating rod 7 and the motor 6 to connect and fix each other. Then, the motor 6 is started, and the output end of the motor 6 drives the rotating rod 7 to start rotating. At the same time, the rotating rod 7 drives the screw rod 1 to rotate. The screw rod 1 can be used to sample concrete. The sampled concrete will fall into the corrugated pipe 8. The corrugated pipe 8 can transport the fallen concrete into the chamber 2 5, thus completing the concrete sampling.

[0042] When it is necessary to remove the concrete from chamber 2 5, the fixing ring 3 and the storage frame 2 are disconnected. At this time, the spring 18 loses its restraint and begins to deform and return to its original position, driving the moving ring 15 back to its original position. Simultaneously, the moving ring 15 drives the rotating rod 7 back to its original position through the connecting rod 16, causing the rotating rod 7 and the output end of motor 1 6 to separate from each other. At this time, the rotating rod 7 will drive the moving plate 9 to move, and drive the moving plate 9 and the threaded strip 10 to be threaded together. At the same time, the rotating rod 7 will drive the two gears 13 to mesh with each other. Then, motor 2 12 is started, which drives the two gears 13 to rotate, and drives the moving plate 9 to rotate through the rotating rod 7. At this time, the moving plate 9 is affected by the threaded strip 10 and begins to move along the side wall of chamber 2 5, thereby removing the concrete from chamber 2 5. This allows the concrete in the storage frame 2 to be removed without manual intervention, avoiding blockage of the sampling tube by the concrete and preventing it from affecting the normal use of the sampling tube.

[0043] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A concrete sampling and testing device, comprising a sampling tube and a screw rod (1), characterized in that: The sampling tube includes a storage frame (2) and a fixing ring (3) that are threaded together. The fixing ring (3) and the screw rod (1) are rotatably connected. The storage frame (2) is provided with a first chamber (4) and a second chamber (5). A motor (6) is fixedly connected in the first chamber (4). A rotating rod (7) is rotatably connected in the second chamber (5). The rotating rod (7) passes through the first chamber (4) and is detachably connected to the output end of the motor (6). When the fixing ring (3) and the storage frame (2) are engaged, the screw rod (1) and the rotating rod (7) are engaged, and at this time the rotating rod (7) and the output end of the motor (6) are connected to each other. The first drive assembly for driving the rotating rod (7) to separate from the output end of the motor (6) is provided in the first chamber (4). The second drive assembly for taking out the concrete in the second chamber (5) is provided in the storage frame (2). A corrugated pipe (8) is fixedly connected to the end of the fixing ring (3) away from the storage frame (2).

2. The concrete sampling and testing device according to claim 1, characterized in that: The second drive assembly includes a movable plate (9) slidably connected to the rotating rod (7). The movable plate (9) is slidably connected to the inner wall of the second chamber (5). The inner wall of the second chamber (5) is provided with a threaded strip (10) for the movable plate (9) to be threadedly connected. When the movable plate (9) and the threaded strip (10) are in contact with each other, the output end of the rotating rod (7) and the motor (6) are separated from each other. The rotating rod (7) located in the second chamber (5) has a rectangular cross section. The side wall of the rotating rod (7) is fixedly connected with a limiting block (11) that is in contact with the movable plate (9). The first chamber (4) is provided with a drive component for driving the movable plate (9) to move along the side wall of the threaded strip (10). When the storage frame (2) and the fixing ring (3) are separated from each other, the output end of the rotating rod (7) and the motor (6) are separated from each other and the movable plate (9) and the threaded strip (10) are in contact with each other.

3. The concrete sampling and testing device according to claim 2, characterized in that: The driving component includes a second motor (12) and two gears (13) fixedly connected to the first chamber (4). The output end of the second motor (12) and the side wall of the rotating rod (7) are fixedly connected to the two gears (13). When the two gears (13) mesh with each other, the limiting block (11) drives the moving plate (9) to move and is threadedly connected to the threaded strip (10). When the output end of the rotating rod (7) and the first motor (6) are connected to each other, the two gears (13) separate from each other.

4. The concrete sampling and testing device according to claim 1, characterized in that: A limiting ring (14) is fixedly connected to the side of the second chamber (5) near the fixing ring (3).

5. A concrete sampling and testing device according to claim 1, characterized in that: The first drive assembly includes a movable ring (15) located in the first chamber (4). The movable ring (15) and the rotating rod (7) are connected by a connecting rod (16). The connecting rod (16) and the rotating rod (7) are rotatably connected. The inner side wall of the first chamber (4) is provided with a sliding groove (17) for the movable ring (15) to slide. The movable ring (15) and the sliding groove (17) are connected by a spring (18). When the spring (18) is in its natural state, the rotating rod (7) and the output end of the first motor (6) are separated from each other. When the storage frame (2) and the fixed ring (3) are engaged with each other, the spring (18) is in a deformed and compressed state.

6. The concrete sampling and testing device according to claim 1, characterized in that: The inner wall of the fixed ring (3) is rotatably connected to a rotating ring (19). The inner wall of the rotating ring (19) and the screw rod (1) are fixedly connected by several fixed rods (20). The end of the screw rod (1) near the rotating rod (7) is fixedly connected to a locking block (21). One end of the rotating rod (7) is provided with a slot (22) for the locking block (21) to engage. When the locking block (21) and the slot (22) engage with each other, the storage frame (2) and the fixed ring (3) engage with each other. At this time, the rotating rod (7) and the output end of the motor (6) are connected to each other.

7. A concrete sampling and testing device according to claim 1, characterized in that: The output end of the motor (6) is fixedly connected to a positioning block (23). One end of the rotating rod (7) is provided with a positioning groove (24) for the positioning block (23) to be inserted. The positioning block (23) is arranged in a pyramidal shape. When the storage frame (2) and the fixing ring (3) are connected to each other, the positioning block (23) and the positioning groove (24) fit together.

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