A concrete admixture sampling device

Abstract

The application belongs to the technical field of admixture sampling, and particularly relates to a concrete admixture sampling device, which comprises a mounting seat, a lead screw linear module fixedly connected to the upper side wall of the mounting seat, and a moving seat fixedly connected to the moving end of the lead screw linear module, further comprising a mounting frame arranged on the upper side wall of the mounting seat and connected with a stirring assembly on the side wall of the mounting frame. The sampling device is provided with an expandable isolation sleeve outside the sampling part. When the sampling device is inserted into the paste-like admixture from top to bottom, the isolation sleeve is simultaneously expanded to effectively prevent the surface admixture from mixing into the lower layer material with the device moving downward, so as to eliminate the cross-mixing pollution problem of the upper and lower layer admixtures and improve the representativeness of the sample and the accuracy of the index detection result.

Description

Technical Field

[0001] This invention belongs to the field of admixture sampling technology, and in particular relates to a concrete admixture sampling device. Background Technology

[0002] Paste-like concrete admixtures are indispensable core modifying materials in modern concrete engineering construction. With their excellent slump retention, water reduction, and strengthening properties, they can effectively optimize concrete workability and improve hardened strength and durability. They are widely used in various civil engineering projects such as building construction, municipal works, and bridges. Compared to liquid admixtures, paste-like admixtures have higher viscosity, and their component stability is easily affected by storage, stacking, and settling time. Long-term stacking and storage can easily lead to stratification, settlement, and uneven component distribution, directly resulting in significant differences in key indicators such as the effective components, viscosity, and solid content of the admixture at different depths. To strictly control the quality of engineering raw materials and comply with national and industry standards for on-site sampling and batch testing of concrete admixtures, it is essential to conduct standardized and precise sampling and testing of paste-like concrete admixtures, and the samples must have complete stratification representativeness.

[0003] Currently, sampling devices commonly use simple sampling rods and sampling cylinders. These devices are inserted vertically into the paste-like admixture material from top to bottom to complete deep sampling. Due to the high viscosity and strong adhesion of the paste-like admixture, a large amount of surface admixture adheres tightly to the outer wall of the sampling device. As the device continues to penetrate deeper into the material, the surface admixture moves down with the device and directly mixes into the lower deep admixture material. This causes different layers of admixture material to mix and cross-contaminate, destroying the original component state and material characteristics of admixtures at different depths. Consequently, the final sample cannot accurately reflect the actual working conditions of the stratified distribution of the paste-like admixture, resulting in significant deviations in subsequent performance test results such as viscosity, solid content, and water reduction rate, and reducing the accuracy and representativeness of the test data.

[0004] To address this issue, a concrete admixture sampling device is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the existing technology by providing a concrete admixture sampling device.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a concrete admixture sampling device, including a mounting base, a linear screw module fixedly connected to the upper side wall of the mounting base, a movable base fixedly connected to the moving end of the linear screw module, and further comprising: A mounting bracket is disposed on the upper side wall of the mounting base, and a stirring assembly is connected to the side wall of the mounting bracket; A first electric push rod is fixedly connected to the inner wall of the mounting frame. The moving end of the first electric push rod is fixedly connected to a lifting frame, and the side wall of the lifting frame is connected to an isolation component. The sampling component, located on the upper side wall of the lifting frame, can take samples at different locations of the paste-like concrete admixture; An auxiliary component is disposed on the surface of the sampling component to ensure the stability of the sampling component when it passes through the isolation component.

[0007] Preferably, the stirring assembly includes a stirring electric push rod fixedly connected to the side wall of the mounting frame. The moving end of the stirring electric push rod passes through the mounting frame and is connected to a stirring motor. The output end of the stirring motor is fixedly connected to a stirring frame.

[0008] Preferably, the isolation assembly includes a fixing ring fixedly connected to the outer wall of the lifting frame. A limit frame is fixedly connected to the upper side wall of the fixing ring. The surface of the limit frame is provided with multiple limit bolts. A second electric push rod is fixedly connected to the upper side wall of the lifting frame. The moving end of the second electric push rod passes through the lifting frame and is fixedly connected to a lifting seat. The lifting seat has a hemispherical structure. An eccentric hole is opened on the upper side wall of the lifting seat. An isolation sleeve is inserted into the eccentric hole. The upper end of the isolation sleeve is a closed structure, and the lower end is an open structure. The open end of the isolation sleeve passes through the eccentric hole and is located between the limit frame and the fixing ring.

[0009] Preferably, the sampling assembly includes a linear motor fixedly connected to the upper side wall of the lifting frame, a sampling frame fixedly connected to the output end of the linear motor, multiple sampling electric push rods fixedly connected to the side wall of the sampling frame, a sampling cylinder mechanism connected to the moving end of each sampling electric push rod, two square tubes connected to the side wall of the sampling frame, a first telescopic tube connecting the rear square tube and the sampling cylinder mechanism, a horizontal tube connecting the two square tubes, two control valves provided in the horizontal tube, and an air pump fixedly connected to the upper side wall of the sampling frame, the air pump's suction end passing through the sampling frame and communicating with the horizontal tube.

[0010] Preferably, the sampling tube mechanism includes an insert tube fixedly connected to the moving end of the sampling electric push rod, the first telescopic tube and the insert tube are connected, a sealing ring is fixedly connected to the inner wall of the insert tube, a storage tube is inserted into the insert tube, the insert tube is fixed to the storage tube by a positioning bolt, a negative pressure hole is opened on the side wall of the storage tube located inside the insert tube, a piston seat is slidably arranged inside the storage tube, and a sampling needle is connected to the side wall of the storage tube extending out of the insert tube.

[0011] Preferably, the auxiliary component includes an auxiliary electric push rod fixedly connected to the side wall of the sampling frame. The moving end of the auxiliary electric push rod is fixedly connected to a connecting frame via a pressure sensor. The lower end of the connecting frame is fixedly connected to an adsorption ring. The adsorption ring has a hollow structure. The adsorption ring and the front square tube are connected by the same second telescopic tube. Multiple micro-adsorption heads are connected to the side wall of the adsorption ring away from the auxiliary electric push rod. A rubber sheet is attached to the side wall of the adsorption ring away from the micro-adsorption heads.

[0012] Preferably, a controller is fixedly connected to the side wall of the mounting base, and two vision sensors are fixedly connected to the side wall of the mounting bracket. The vision sensors and the controller are electrically connected.

[0013] Preferably, a pressure sensor is connected to the side wall of the square tube, and the pressure sensor is electrically connected to the controller.

[0014] Compared with existing technologies, the present invention has the following advantages: 1. This invention involves placing an isolation sleeve around the lifting seat and the fixing ring, with the excess upper part of the isolation sleeve passing through an eccentric hole on the surface of the lifting seat, so that the inner wall of the isolation sleeve faces outward. Before sampling the paste-like admixture, the lifting seat and the fixing ring are moved downward together, causing the fixing ring to drive a portion of the isolation sleeve into the upper layer of the paste-like admixture. The fixing ring remains stationary at the upper layer of the paste-like admixture, allowing the lifting seat to push the isolation sleeve downward into the depths of the paste-like admixture. The excess portion of the isolation sleeve is gradually pulled out and unfolded through the eccentric hole on the surface of the lifting seat. The isolation sleeve will slide with the lifting seat, and the sliding part of the isolation sleeve will carry the adhered paste-like additive and move relative to the lifting seat. The isolation sleeve and the adhered paste-like additive will remain in a certain position. The lifting seat will continue to push the excess part of the isolation sleeve downward. The paste-like additives adhering to different positions on the surface of the isolation sleeve will move a short distance. Then, the storage tube will be inserted into the isolation sleeve through the opening of the fixing ring for puncture sampling. The storage tube will not come into direct contact with the paste-like additive to avoid cross-mixing of the upper and lower layers of paste-like additives, which would affect the accuracy of sampling and measurement.

[0015] 2. Before sampling by puncturing the isolation sleeve, the present invention uses an adsorption ring to bring the rubber plate into contact with the puncture area of ​​the isolation sleeve, and uses the micro-adsorption head on the surface of the adsorption ring to adsorb and restrict the puncture area of ​​the isolation sleeve. Then, the sampling needle punctures the rubber plate and the isolation sleeve to collect the sample. By adsorbing and restricting the isolation sleeve by the adsorption ring, the problem of the damaged area of ​​the isolation sleeve becoming larger and the paste-like additive entering the isolation sleeve through the damaged area and adhering to the surface of the sampling device is avoided. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the sampling component of the present invention; Figure 3 This is a schematic diagram of the working state structure of the sampling component of the present invention; Figure 4 This is a schematic diagram of the internal structure of the sampling component of the present invention during operation; Figure 5 This is a schematic diagram of the structure of the isolation component of the present invention; Figure 6 This is a schematic diagram of the structure of the auxiliary component of the present invention; Figure 7 This is a schematic diagram of the surface structure of the adsorption ring of the present invention; Figure 8 This is a schematic diagram of the sampling cylinder mechanism of the present invention.

[0017] In the diagram: 1 Mounting base, 2 Lead screw linear module, 3 Moving base, 4 Mounting frame, 5 First electric push rod, 6 Lifting frame, 7 Stirring assembly, 71 Stirring electric push rod, 72 Stirring motor, 8 Stirring frame, 9 Isolation assembly, 91 Fixing ring, 92 Limiting frame, 10 Second electric push rod, 11 Lifting base, 12 Eccentric hole, 13 Isolation sleeve, 14 Sampling assembly, 141 Linear motor, 142 Sampling frame, 15 Sampling electric push rod, 16 Square tube, 17 First telescopic tube, 18 Horizontal tube, 19 Control valve, 20 Air pump, 21 Sampling cylinder mechanism, 211 Insert tube, 212 Sealing ring, 22 Storage cylinder, 23 Negative pressure hole, 24 Piston seat, 25 Sampling needle, 26 Auxiliary assembly, 261 Auxiliary electric push rod, 262 Connecting frame, 27 Adsorption ring, 28 Second telescopic tube, 29 Miniature adsorption head, 30 Rubber sheet, 31 Controller, 32 Vision sensor, 33 Pressure sensor. Detailed Implementation

[0018] The technical solutions in the embodiments of the present invention will now be clearly and completely described in conjunction with the accompanying drawings.

[0019] like Figure 1 The concrete admixture sampling device shown includes a mounting base 1, a linear screw module 2 fixedly connected to the upper side wall of the mounting base 1, a movable base 3 fixedly connected to the movable end of the linear screw module 2, and a mounting frame 4 disposed on the upper side wall of the mounting base 1. A controller 31 is fixedly connected to the side wall of the mounting base 1. Two vision sensors 32 are fixedly connected to the side wall of the mounting frame 4. The vision sensors 32 and the controller 31 are electrically connected. A mixing assembly 7 is connected to the side wall of the mounting frame 4. The mixing assembly 7 includes a mixing electric push rod 71 fixedly connected to the upper side wall of the mounting frame 4. The movable end of the mixing electric push rod 71 passes through the mounting frame 4 and is connected to a mixing motor 72. The output end of the mixing motor 72 is fixedly connected to a mixing rack 8.

[0020] In actual use, the admixture transport cylinder is placed on the surface of the moving base 3. The controller 31 controls the linear screw module 2 to start, which moves the moving base 3 and the transport cylinder to directly below the mixing frame 8. Then, the electric stirring push rod 71 extends, which drives the stirring motor 72 and the mixing frame 8 to move downward as a whole, so that the mixing frame 8 is fully inserted into the paste admixture. Then, the stirring motor 72 is started to drive the mixing frame 8 to rotate at a uniform speed, so as to carry out overall stirring and homogenization of the admixture inside and outside the cylinder. The function of this structure is to break up the material stratification in advance, soften the dried material on the surface, and keep the overall concentration of the admixture inside and outside the cylinder consistent, so as to solve the problem of uneven sampling caused by static stratification and surface drying.

[0021] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the first electric push rod 5 is fixedly connected to the inner wall of the mounting frame 4. The moving end of the first electric push rod 5 is fixedly connected to the lifting frame 6. The side wall of the lifting frame 6 is connected to the isolation component 9. The isolation component 9 includes a fixing ring 91 fixedly connected to the outer wall of the lifting frame 6. The upper side wall of the fixing ring 91 is fixedly connected to the limit frame 92. The surface of the limit frame 92 is provided with multiple limit bolts. The upper side wall of the lifting frame 6 is fixedly connected to the second electric push rod 10. The moving end of the second electric push rod 10 passes through the lifting frame 6 and is fixedly connected to the lifting seat 11. The lifting seat 11 is a hemispherical structure. The upper side wall of the lifting seat 11 is provided with an eccentric hole 12. An isolation sleeve 13 is inserted into the eccentric hole 12. The upper end of the isolation sleeve 13 is a closed structure, and the lower end is an open structure. The open end of the isolation sleeve 13 passes through the eccentric hole 12 and is located between the limit frame 92 and the fixing ring 91.

[0022] In actual use, the controller 31 controls the first electric push rod 5 to extend, driving the lifting frame 6, fixing ring 91, lifting seat 11, and isolation sleeve 13 to move downwards as a whole. The vision sensor 32 monitors the downward movement position in real time. When the lower end of the isolation sleeve 13 contacts the surface of the admixture, the controller 31 controls the first electric push rod 5 to stop, completing the surface alignment. Subsequently, the controller 31 controls the second electric push rod 10 to extend, driving the hemispherical lifting seat 11 to extend downwards into the deep area of ​​the admixture. Since the upper end of the isolation sleeve 13 is locked and fixed by the fixing ring 91 and the limiting frame 92, the remaining bag of the isolation sleeve 13 will be gradually removed during the downward movement of the lifting seat 11. The body is pulled out and extended from the eccentric hole 12. The eccentric hole 12 has a small diameter, which can compress and constrain the wall of the isolation sleeve 13, reducing the entry of the surface admixture into the sleeve body through the gap. After the extension, the isolation sleeve 13 wraps around the outside of the lifting seat 11, which can completely isolate the dried surface layer of admixture and impurities on the outside. At the same time, the isolation sleeve 13 and the lifting seat 11 can slide relative to each other, so that the surface impurities adhering to the outside of the isolation sleeve 13 are kept in the shallow layer of the material and will not be carried into the deep sampling area by the sampling structure. This structure effectively isolates the surface unqualified material, ensuring that the subsequent sampling structure only collects the deep homogeneous admixture, improving the sampling purity and sample representativeness.

[0023] like Figure 6 and Figure 8 As shown, the sampling assembly 14 is installed on the upper side wall of the lifting frame 6. The sampling assembly 14 includes a linear motor 141 fixedly connected to the upper side wall of the lifting frame 6. The output end of the linear motor 141 is fixedly connected to a sampling frame 142. Multiple sampling electric push rods 15 are fixedly connected to the side wall of the sampling frame 142. The moving end of the sampling electric push rod 15 is connected to a sampling cylinder mechanism 21. Two square tubes 16 are connected to the side wall of the sampling frame 142. A pressure sensor 33 is connected to the side wall of the square tube 16. The pressure sensor 33 is electrically connected to the controller 31. The same first telescopic tube 17 connects the rear square tube 16 and the sampling cylinder mechanism 21. The same horizontal tube 18 connects the two square tubes 16. Two control valves 19 are installed in the horizontal tube 18. A vacuum pump 20 is fixedly connected to the upper side wall of the sampling frame 142. The vacuum pump 20 passes through the sampling frame 142 and is connected to the horizontal tube 18. The sampling tube mechanism 21 includes an insert 211 fixedly connected to the moving end of the sampling electric push rod 15. The first telescopic tube 17 is connected to the insert 211. A sealing ring 212 is fixedly connected to the inner wall of the insert 211. A storage tube 22 is inserted into the insert 211. The insert 211 is fixed to the storage tube 22 by a positioning bolt. A negative pressure hole 23 is opened on the side wall of the storage tube 22 located inside the insert 211. A piston seat 24 is slidably arranged inside the storage tube 22. A sampling needle 25 is connected to the side wall of the storage tube 22 extending out of the insert 211. Sampling can be performed at different locations of the paste concrete admixture.

[0024] In actual use, the linear motor 141 can drive the sampling frame 142 to move laterally, and in conjunction with the sampling electric push rod 15 to insert vertically, it can complete multi-point sampling at different depths and positions of the admixture, improving the comprehensiveness of sampling. During the sampling operation, the controller 31 starts the air pump 20 and opens the corresponding side control valve 19. The air pump 20 extracts the air inside the storage cylinder 22 through the horizontal pipe 18, the square pipe 16, and the first telescopic pipe 17. The negative pressure hole 23 and the piston seat 24 form a stable negative pressure adsorption environment. Under the action of negative pressure, deep layers are adsorbed. The homogenized additive is smoothly drawn into the storage cylinder 22 through the sampling needle 25. The sealing ring 212 can ensure the sealing between the insertion cylinder 211 and the storage cylinder 22, avoiding air leakage and insufficient negative pressure, and ensuring the stability of the sampling process. The pressure sensor 33 monitors the changes in pipeline pressure in real time, which can help determine whether the sampling is normal and whether there is a blockage or air leakage problem, so as to facilitate the stable operation of the equipment. This structure can stably achieve deep and accurate sampling, with uniform sampling volume and good sealing. The multi-point sampling method further improves the accuracy of sample detection.

[0025] like Figure 6 and Figure 7 As shown, the auxiliary component 26 is disposed on the surface of the sampling component 14. The auxiliary component 26 includes an auxiliary electric push rod 261 fixedly connected to the side wall of the sampling frame 142. The moving end of the auxiliary electric push rod 261 is fixedly connected to the connecting frame 262 via a pressure sensor. The lower end of the connecting frame 262 is fixedly connected to an adsorption ring 27. The adsorption ring 27 has a hollow structure. The adsorption ring 27 and the front square tube 16 are connected by the same second telescopic tube 28. Multiple micro adsorption heads 29 are connected to the side wall of the adsorption ring 27 away from the auxiliary electric push rod 261. A rubber sheet 30 is pasted on the side wall of the adsorption ring 27 away from the micro adsorption heads 29 to ensure the stability of the sampling component 14 when it passes through the isolation component 9.

[0026] In actual use, the controller 31 controls the auxiliary electric push rod 261 to extend, driving the connecting frame 262 and the adsorption ring 27 closer to the isolation sleeve 13. The pressure sensor monitors the squeezing force in real time. When the pressure is stabilized at the set value, the machine stops to ensure that the adsorption ring 27 and the isolation sleeve 13 are gently fitted without squeezing and damaging the isolation sleeve 13. Then, the controller 31 opens the corresponding control valve 19 and starts the air pump 20 to extract the gas inside the adsorption ring 27, so that the micro adsorption head 29 generates adsorption force to stably adsorb and fix the local isolation sleeve 13, limiting the shaking and wrinkling deformation of the isolation sleeve 13 during operation. The rubber sheet 30 can further improve the fit and seal, and at the same time play a buffering and protective role to avoid hard squeezing and damage to the isolation sleeve 13. This structure effectively improves the stability of the working state of the isolation sleeve 13, ensures the continuous effectiveness of the surface isolation effect, and provides stable structural conditions for deep and accurate sampling.

[0027] like Figures 1-8As shown, the operating principle of the present invention is explained as follows: The concrete paste admixture transport cylinder to be sampled is moved to the bottom of the mixing component 7. The mixing component 7 is used to stir the paste admixture in the transport cylinder (according to the mandatory requirement of the national standard "Concrete Admixtures" (GB8076-2008), the paste admixture must be stirred to prevent the paste admixture from stratifying and settling, which would directly lead to the failure of the test). Then, the stirred transport cylinder is moved to the bottom of the sampling component 14 and the sampling work is carried out immediately (if the sampling work is not carried out within ten minutes, it needs to be stirred again). The controller 31 controls the isolation component 9 to be inserted into the paste-like concrete admixture. Through the sliding fit between the isolation sleeve 13 and the lifting seat 11, the adhered paste-like admixture is placed in a deep and relatively fixed position. Subsequently, the controller 31 controls the auxiliary component 26 to drive the adsorption ring 27 and the micro adsorption head 29 on the surface to adsorb the isolation sleeve 13 of the area to be punctured. Then, the controller controls the sampling electric push rod 15 to drive the storage cylinder 22 and the sampling needle 25 to pass through the rubber sheet 30 and the isolation sleeve 13 on the side wall of the adsorption ring 27 in sequence, and extend into the paste-like admixture. Then, the controller 31 controls the vacuum pump 20 to work and controls the control valve 19 near the first telescopic tube 17 to open. The gas in the space of the piston seat 24 near the sealing ring 212 in the storage cylinder 22 will be extracted. Under the action of negative pressure, the paste-like admixture is drawn into the storage cylinder 22 through the sampling needle 25. After the sampling is completed, the controller 31 controls the vacuum pump 20 to stop working and controls the control valve 19 on this side to close. Then, the controller controls the sampling electric push rod 15 to move the storage cylinder 22, so that the sampling needle 25 is pulled out from the rubber sheet 30. Then the controller 31 controls the first electric push rod 5 to work. The first electric push rod 5 drives all the structures to move upward together through the lifting frame 6 and is pulled out from the paste-like additive.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A concrete admixture sampling device, comprising a mounting base (1), wherein a linear screw module (2) is fixedly connected to the upper side wall of the mounting base (1), and a movable base (3) is fixedly connected to the movable end of the linear screw module (2), characterized in that, Also includes: Mounting bracket (4) is provided on the upper side wall of the mounting base (1), and the side wall of the mounting bracket (4) is connected to a stirring assembly (7). The first electric push rod (5) is fixedly connected to the inner wall of the mounting frame (4), and the moving end of the first electric push rod (5) is fixedly connected to the lifting frame (6). The side wall of the lifting frame (6) is connected to the isolation component (9). The sampling component (14) is set on the upper side wall of the lifting frame (6) and can take samples at different locations of the paste concrete admixture; An auxiliary component (26) is disposed on the surface of the sampling component (14) to ensure the stability of the sampling component (14) as it passes through the isolation component (9).

2. The concrete admixture sampling device according to claim 1, characterized in that, The stirring assembly (7) includes a stirring electric push rod (71) fixedly connected to the upper side wall of the mounting frame (4). The moving end of the stirring electric push rod (71) passes through the mounting frame (4) and is connected to a stirring motor (72). The output end of the stirring motor (72) is fixedly connected to a stirring frame (8).

3. A concrete admixture sampling device according to claim 1, characterized in that, The isolation component (9) includes a fixed ring (91) fixedly connected to the outer wall of the lifting frame (6). A limit frame (92) is fixedly connected to the upper side wall of the fixed ring (91). The surface of the limit frame (92) is provided with multiple limit bolts. A second electric push rod (10) is fixedly connected to the upper side wall of the lifting frame (6). The moving end of the second electric push rod (10) passes through the lifting frame (6) and is fixedly connected to a lifting seat (11). The lifting seat (11) is a hemispherical structure. An eccentric hole (12) is opened on the upper side wall of the lifting seat (11). An isolation sleeve (13) is inserted into the eccentric hole (12). The upper end of the isolation sleeve (13) is a closed structure, and the lower end is an open structure. The open end of the isolation sleeve (13) passes through the eccentric hole (12) and is located between the limit frame (92) and the fixed ring (91).

4. A concrete admixture sampling device according to claim 1, characterized in that, The sampling assembly (14) includes a linear motor (141) fixedly connected to the upper side wall of the lifting frame (6). The output end of the linear motor (141) is fixedly connected to a sampling frame (142). Multiple sampling electric push rods (15) are fixedly connected to the side wall of the sampling frame (142). The moving end of the sampling electric push rod (15) is connected to a sampling cylinder mechanism (21). Two square tubes (16) are connected to the side wall of the sampling frame (142). The same first telescopic tube (17) connects the rear square tube (16) and the sampling cylinder mechanism (21). The same horizontal tube (18) connects the two square tubes (16). Two control valves (19) are provided in the horizontal tube (18). A vacuum pump (20) is fixedly connected to the upper side wall of the sampling frame (142). The vacuum pump (20) passes through the sampling frame (142) and is connected to the horizontal tube (18).

5. A concrete admixture sampling device according to claim 4, characterized in that, The sampling tube mechanism (21) includes a tube (211) fixedly connected to the moving end of the sampling electric push rod (15). The first telescopic tube (17) and the tube (211) are connected. A sealing ring (212) is fixedly connected to the inner wall of the tube (211). A storage tube (22) is inserted into the tube (211). The tube (211) is fixed to the storage tube (22) by a positioning bolt. A negative pressure hole (23) is opened on the side wall of the storage tube (22) inside the tube (211). A piston seat (24) is slidably arranged inside the storage tube (22). A sampling needle (25) is connected to the side wall of the storage tube (22) extending out of the tube (211).

6. A concrete admixture sampling device according to claim 4, characterized in that, The auxiliary component (26) includes an auxiliary electric push rod (261) fixedly connected to the side wall of the sampling frame (142). The moving end of the auxiliary electric push rod (261) is fixedly connected to a connecting frame (262) via a pressure sensor. The lower end of the connecting frame (262) is fixedly connected to an adsorption ring (27). The adsorption ring (27) is a hollow structure. The adsorption ring (27) and the front square tube (16) are connected by the same second telescopic tube (28). The side wall of the adsorption ring (27) away from the auxiliary electric push rod (261) is connected to multiple micro adsorption heads (29). The side wall of the adsorption ring (27) away from the micro adsorption heads (29) is attached with a rubber sheet (30).

7. A concrete admixture sampling device according to claim 4, characterized in that, The side wall of the mounting base (1) is fixedly connected to a controller (31), and the side wall of the mounting bracket (4) is fixedly connected to two vision sensors (32). The vision sensors (32) and the controller (31) are electrically connected.

8. A concrete admixture sampling device according to claim 7, characterized in that, A pressure sensor (33) is connected to the side wall of the square tube (16), and the pressure sensor (33) is electrically connected to the controller (31).

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