Cement grouting material sampling inspection device with self-cleaning function

Abstract

The utility model provides a cement grouting material sampling inspection device with a self-cleaning function, which relates to the technical field of sampling inspection devices and comprises a fixing plate, a supporting plate is fixedly mounted at the bottom end of the fixing plate, and a rotating column is sleeved in the supporting plate. According to the device disclosed by the utility model, by arranging the structures of the fixed plate, the supporting plate, the rotating column, the limiting block, the fixed cylinder, the rotating wheel, the thread, the moving wheel, the water tank, the input pipe, the water pump and the conveying pipe, a plurality of structures of the device are arranged for matched movement in the use process of the device, so that the device does not need to depend on manual operation of simple tools for sampling and then conveying to a laboratory for detection; the detection efficiency of the equipment can be effectively improved, a sample can be prevented from being influenced by human factors, meanwhile, the equipment can be effectively, simply and conveniently cleaned by arranging a water pump and a plurality of connecting pipes, manual cleaning is not needed, the cleaning effect of the equipment is effectively improved, the next use is prevented from being influenced, and the service life of the equipment can be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of sampling inspection devices, and in particular to a sampling inspection device for cement grouting material with self-cleaning function. Background Technology

[0002] In modern construction engineering, cement grout is widely used in various construction stages. Its quality is crucial to the stability, durability, and safety of building structures, making regular and accurate sampling inspections of cement grout significant. Traditional sampling inspections rely on manual operation with simple tools to collect samples before sending them to the laboratory for testing, which is inefficient and the representativeness of the samples is easily affected by human factors. Although some sampling inspection devices have emerged, they have many problems. For example, a large amount of cement grout remains inside the device after sampling, making cleaning difficult. Manual cleaning is time-consuming, labor-intensive, and incomplete, affecting future use and the device's lifespan. Most devices have limited functionality and lack self-cleaning or other maintenance functions, requiring additional manpower and resources to maintain the equipment before and after each sampling inspection. Moreover, their adaptability is limited, making it difficult to meet the diverse needs of different construction engineering scenarios for mobility, anti-interference capabilities, and other aspects.

[0003] However, traditional equipment relies on manual sampling using simple tools before sending samples to the laboratory for testing. This method is inefficient, and the representativeness of the samples is easily affected by human factors. Furthermore, traditional equipment leaves a large amount of cement grout residue inside after sampling, making cleaning difficult. Manual cleaning is time-consuming, labor-intensive, and incomplete, affecting future use and the lifespan of the equipment. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this utility model is to solve the technical problems mentioned in the background art.

[0005] This utility model adopts the following technical solution: a cement grout sampling device with self-cleaning function, including a fixed plate, a support plate fixedly installed at the bottom end of the fixed plate, a rotating column sleeved inside the support plate, a limit block fixedly installed on the bottom outer surface of the rotating column, a fixed cylinder sleeved on the outer surface of the rotating column, a rotating wheel sleeved on the outer surface of the rotating column, threads formed inside the rotating wheel and on the outer surface of the rotating column, a movable wheel sleeved at the bottom of the fixed cylinder, a water tank fixedly installed on the surface of the fixed plate, an input pipe fixedly installed on one side of the water tank, a water pump fixedly installed on the surface of the fixed plate, a delivery pipe fixedly installed at one output end of the water pump, a delivery pipe fixedly installed at another output end of the water pump, a sample collection container fixedly installed on the surface of the fixed plate, a closing cap sleeved at the top of the sample collection container, a groove formed inside the closing cap, an annular tube sleeved inside the groove, and a nozzle fixedly installed on the surface of the annular tube. A vacuum pump is fixedly mounted on the surface of the fixed plate. A connecting pipe 1 is fixedly mounted on the output end of the vacuum pump. A placement box is fixedly mounted on the surface of the fixed plate. A connecting pipe 2 and a connecting pipe 3 are fixedly mounted on the surface of the placement box. A closing cover 2 is rotatably connected to the surface of the placement box. A fixing block is fixedly mounted inside the placement box. A filter screen is fitted inside the fixing block. Fixing grooves are formed on the surfaces of the fixing block and the filter screen. A spring is fitted inside the fixing groove. An arc-shaped block is fitted inside the fixing groove. An operating groove is formed on the surface of the fixing block. A gear is fitted inside the operating groove. A rack is fitted inside the operating groove. A pull block is fixedly mounted at the rear end of the rack. An insertion post is fixedly mounted on the surface of the pull block. A tension spring is fitted on the outer surface of the insertion post. An insertion groove is formed on the surface of the filter screen. A through groove is formed through the surface of the fixed plate. A sampling tube is fitted inside the through groove. A sampling head is fitted on the bottom outer surface of the sampling tube.

[0006] Preferably, one end of the spring is fixedly connected to the surface of the fixing groove, and the other end of the spring is fixedly connected to the rear end surface of the arc-shaped block. The fixing grooves, springs, and arc-shaped blocks are in multiple sets and symmetrically distributed inside the placement box. Here, one end of the spring is fixedly connected to the surface of the fixing groove, and the other end is fixedly connected to the rear end surface of the arc-shaped block, and multiple sets of fixing grooves, springs, and arc-shaped blocks are symmetrically distributed inside the placement box. This symmetrical distribution design ensures that the filter screen receives a uniform fixing force within the fixing blocks, guaranteeing the stability of the filter screen's position during filtration. It prevents displacement or loosening due to uneven local force, thus ensuring the consistency and reliability of the filtration effect.

[0007] Preferably, one end of the tension spring is fixedly connected to the surface of the pull block, and the other end of the tension spring is fixedly connected to the surface of the fixing block. There are four sets of tension springs and fixing blocks, symmetrically distributed inside the placement box. This symmetrical distribution design allows for uniform force application from multiple directions when the filter screen is fixed or released by pulling the rack and pinion via the pull block, thus controlling the fixing or releasing action.

[0008] Preferably, the gear surface meshes with the rack surface, the rack consists of four sets of racks arranged diagonally symmetrically between each pair, the sampling head and sampling tube are fixedly connected by threads, a flange is fixedly mounted on one end of the input tube, the other end of the first delivery pipe is connected and fixedly connected to the surface of the water tank, the second delivery pipe is made of a soft material, and its other end is connected and fixedly connected to the surface of the inner annular tube of the first closing cover. Here, the gear surface meshes with the rack surface, and this precise meshing relationship can accurately convert the linear motion of the rack into the rotational motion of the gear, thereby achieving precise control of related components through connection with other components.

[0009] Preferably, the nozzles are arranged in multiple groups in a circular pattern inside the groove, with the bottom end of the groove penetrating the bottom end of the first closing cover. The nozzles are angled on the annular tube. The vacuum pump and water pump are connected and fixed to the fixing plate by bolts. The second connecting pipe is made of a flexible material. Here, the multiple groups of nozzles are arranged in a circular pattern inside the groove, and the nozzles are angled on the annular tube. This distribution and angle design allows the liquid sprayed from the nozzles to form an all-round, multi-angle spraying effect inside the sample collection container.

[0010] Preferably, the other end of the first connecting tube is fixedly connected to the surface of the sample collection container, the other end of the second connecting tube is fixedly connected to the surface of the sample collection container, and the other end of the third connecting tube is fixedly connected to the top of the sampling tube. A handle is fixedly mounted on the surface of the first closing cap, and a sponge sleeve is fitted onto the outer surface of the handle. Here, the first connecting tube connects and fixes the vacuum pump to the surface of the sample collection container, ensuring that a negative pressure environment can be effectively created inside the sample collection container during the sampling process, which is conducive to the smooth suction of cement grout.

[0011] Preferably, a movable block is fixedly mounted on the surface of the sampling tube, and a support column is fixedly mounted on the top of the fixed plate. A movable groove is formed through the surface of the support column, and a lead screw is fitted inside the movable groove. A handwheel is fixedly mounted on the top of the lead screw. Here, the movable block fixedly mounted on the surface of the sampling tube cooperates with the movable groove formed through the surface of the support column fixedly mounted on the top of the fixed plate and the lead screw. By rotating the handwheel at the top of the lead screw, the up-and-down movement of the sampling tube can be precisely controlled through the threaded connection between the lead screw and the movable block.

[0012] Preferably, the lead screw and the moving block are connected by a thread, and the moving block is T-shaped. This threaded connection enables precise linear motion control. When the lead screw is rotated, the moving block moves accurately up and down along the moving groove according to the direction and number of rotations of the lead screw, thereby driving the sampling tube to achieve precise lifting and lowering movements. The T-shaped moving block allows for more stable movement within the moving groove. The T-shaped structure increases the contact area with the moving groove, reducing potential swaying or offset during movement, ensuring the stability and accuracy of the sampling tube's movement, and thus ensuring the precision and reliability of the sampling operation.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, by setting up a structure consisting of a fixed plate, a support plate, a rotating column, a limiting block, a fixed cylinder, a rotating wheel, a thread, a moving wheel, a water tank, an input pipe, a water pump, and a delivery pipe, the coordinated movement of these multiple structures during equipment use allows for sample collection without relying on manual operation or simple tools before sending samples to the laboratory for testing. This effectively improves the equipment's testing efficiency and avoids the influence of human factors on samples. Furthermore, the inclusion of a water pump and connecting pipes enables efficient and convenient cleaning of the equipment without manual intervention, significantly improving its cleanliness, preventing impact on future use, and extending the equipment's lifespan.

[0015] 2. In this utility model, by setting up a moving block, support column, moving groove, lead screw, and handwheel structure, the up-and-down movement of the sampling tube can be precisely controlled during equipment use by rotating the handwheel at the top of the lead screw, utilizing the threaded connection between the lead screw and the moving block. This design allows the sampling tube to be flexibly adjusted according to different sampling depth requirements, improving the device's sampling capability for cement grouting materials at different depths, ensuring the acquisition of representative samples, meeting the requirements of various sampling scenarios, and effectively improving the adaptability of the equipment. Attached Figure Description

[0016] Figure 1This utility model presents a three-dimensional structural diagram of a cement grout sampling device with self-cleaning function;

[0017] Figure 2 This utility model provides a side end structural diagram of a cement grout sampling device with self-cleaning function.

[0018] Figure 3 This utility model provides an exploded structural diagram of a cement grout sampling device with self-cleaning function.

[0019] Figure 4 This utility model provides a schematic diagram of the placement box structure of a cement grout material sampling device with self-cleaning function;

[0020] Figure 5 This utility model provides a partial structural schematic diagram of a cement grout sampling device with self-cleaning function.

[0021] Figure 6 This invention proposes a cement grout sampling device with self-cleaning function. Figure 4 Enlarged view of point A in the middle.

[0022] Legend:

[0023] 1. Fixed plate; 2. Support plate; 3. Rotating column; 4. Limiting block; 5. Fixed cylinder; 6. Rotating wheel; 7. Thread; 8. Moving wheel; 9. Water tank; 10. Input pipe; 11. Water pump; 12. Delivery pipe one; 13. Delivery pipe two; 14. Sample collection container; 15. Closing cap one; 16. Groove; 17. Ring tube; 18. Nozzle; 19. Vacuum pump; 20. Connecting pipe one; 21. Placement box; 22. Connecting pipe two; 23. Connecting pipe three; 24. 25. Closing cover; 26. Fixing block; 27. Filter screen; 28. Fixing groove; 29. ​​Spring; 20. Arc-shaped block; 31. Operating groove; 32. Gear; 33. Rack; 34. Pull block; 35. Insertion post; 36. Tension spring; 37. Insertion groove; 38. Through groove; 39. Sampling tube; 40. Sampling head; 41. Flange; 42. Handle; 43. Sponge sleeve; 44. Moving block; 45. Support post; 46. Moving groove; 47. Screw; 48. Handwheel. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0026] Example 1

[0027] Please see Figures 1-6This utility model provides a technical solution: a cement grout sampling inspection device with self-cleaning function, including a fixed plate 1, a support plate 2 fixedly installed at the bottom end of the fixed plate 1, a rotating column 3 sleeved inside the support plate 2, a limit block 4 fixedly installed on the bottom outer surface of the rotating column 3, a fixed cylinder 5 sleeved on the outer surface of the rotating column 3, a rotating wheel 6 sleeved on the outer surface of the rotating column 3, threads 7 formed inside the rotating wheel 6 and on the outer surface of the rotating column 3, a movable wheel 8 sleeved at the bottom of the fixed cylinder 5, a water tank 9 fixedly installed on the surface of the fixed plate 1, and a conveyor belt fixedly installed on one side of the water tank 9. A water pump 11 is fixedly mounted on the surface of the fixing plate 1, with a delivery pipe 12 fixedly mounted at one output end of the water pump 11 and a delivery pipe 13 fixedly mounted at the other output end of the water pump 11. A sample collection container 14 is fixedly mounted on the surface of the fixing plate 1, with a closing cap 15 fitted over the top of the sample collection container 14. A groove 16 is formed inside the closing cap 15, and an annular tube 17 is fitted inside the groove 16. A nozzle 18 is fixedly mounted on the surface of the annular tube 17. A vacuum pump 19 is fixedly mounted on the surface of the fixing plate 1, with a connecting pipe fixedly mounted at the output end of the vacuum pump 19. A placement box 21 is fixedly installed on the surface of the fixing plate 1. A connecting pipe 22 and a connecting pipe 23 are fixedly installed on the surface of the placement box 21. A closing cover 24 is rotatably connected to the surface of the placement box 21. A fixing block 25 is fixedly installed inside the placement box 21. A filter screen 26 is fitted inside the fixing block 25. Fixing grooves 27 are formed on the surfaces of both the fixing block 25 and the filter screen 26. A spring 28 is fitted inside the fixing groove 27. An arc-shaped block 29 is fitted inside the fixing groove 27. An operating groove 30 is formed on the surface of the fixing block 25. A gear 31 is fitted inside the operating groove 30, and a rack 32 is fitted inside the operating groove 30. A pull block 33 is fixedly installed at the rear end of the rack 32. An insertion post 34 is fixedly installed on the surface of the pull block 33. A tension spring 35 is fitted on the outer surface of the insertion post 34. An insertion groove 36 is opened on the surface of the filter screen 26. A through groove 37 is opened through the surface of the fixing plate 1. A sampling tube 38 is fitted inside the through groove 37. A sampling head 39 is fitted on the bottom outer surface of the sampling tube 38. First, the vacuum pump 19 is started. The vacuum pump 19 evacuates the sample collection container 14 through the connecting pipe 20 to create a negative pressure environment. The handwheel 47 at the top of the lead screw 46 is rotated. The lead screw 46 is connected to the moving block 43 on the sampling tube 38 through the thread 7, so that the sampling tube 38 moves downward along the moving groove 45 of the support column 44 according to the required sampling depth until the sampling head 39 is inserted into the cement grout to the predetermined depth. Because the sample collection container 14 is under negative pressure, the cement grout is drawn into the sample collection container 14 through the sampling tube 38 under the action of pressure difference, thus completing the sampling operation.After sampling, turn the handwheel 47 in the reverse direction to lift the sampling tube 38 back to its original position, turn off the vacuum pump 19, open the closed cover 15 of the sample collection container 14, and take out an appropriate amount of cement grout sample from the sample collection container 14. Test the sample for various performance indicators such as consistency and strength according to the corresponding testing standards and methods. Then, start the water pump 11. The water pump 11 drives the water tank 9 to flow through the delivery pipe 12 and delivery pipe 23 to the inside of the annular pipe 17. Then, the water flows out from the nozzle 18 to spray and clean the inner wall of the sample collection container 14 from all directions and multiple angles, removing residual cement grout and other impurities. Simultaneously, if the filter screen 26 in the box 21 needs cleaning, first contact it with the surface of the closed cover 24, then pull the closed cover 24. The movement of the closed cover 24 will then clean the filter screen. Open the placement box 21, then pull the pull block 33. The pull block 33 drives the rack 32 to move, and the rack 32 meshes with the gear 31, causing the gear 31 to rotate. The movement of the pull block 33 drives the insertion post 34 to move, and then the movement of the insertion post 34 drives the tension spring 35 to stretch. Then the insertion post 34 disengages from the insertion slot 36. Next, the hand contacts the surface of the filter screen 26 and pulls the filter screen 26. The movement of the filter screen 26 drives the arc block 29 to squeeze, and then the movement of the arc block 29 drives the spring 28 to contract. Then the filter screen 26 disengages from the fixing block 25, allowing for cleaning, replacement, and maintenance. For components such as the sampling tube 38 and sampling head 39 that may have residual cement grout, rinse them with water sprayed from the nozzle 18 to ensure that all components are clean. After self-cleaning is complete, turn off the water pump 11.

[0028] Please see Figures 1-6One end of spring 28 is fixedly connected to the surface of fixing groove 27, and the other end of spring 28 is fixedly connected to the rear end surface of arc block 29. The number of fixing grooves 27, springs 28, and arc blocks 29 are multiple sets and symmetrically distributed inside the placement box 21. One end of tension spring 35 is fixedly connected to the surface of pull block 33, and the other end of tension spring 35 is fixedly connected to the surface of fixing block 25. The number of tension springs 35 and fixing blocks 25 are four sets and symmetrically distributed inside the placement box 21. The surface of gear 31 meshes with the surface of rack 32. The number of racks 32 is four sets, and each pair of sets is diagonally symmetrically distributed. Sampling head 39 is fixedly connected to sampling tube 38 by threads. A flange 40 is fixedly installed on one end of the surface of input pipe 10. The other end of conveying pipe one 12 is fixedly connected to the surface of water tank 9. The material of conveying pipe two 13 is soft material, and the other end of conveying pipe two 13 is connected to closing cover one 15. The surface of the inner annular tube 17 is fixedly connected. There are multiple sets of nozzles 18, which are circumferentially distributed inside the groove 16. The bottom end of the groove 16 penetrates the bottom end of the closing cover 15. The nozzles 18 are inclined at the angle of the annular tube 17. The vacuum pump 19 and the water pump 11 are fixedly connected to the fixing plate 1 by bolts. The material of the connecting tube 22 is soft. The other end of the connecting tube 20 is fixedly connected to the surface of the sample collection container 14. The other end of the connecting tube 22 is fixedly connected to the surface of the sample collection container 14. The other end of the connecting tube 33 is fixedly connected to the top end of the sampling tube 38. The surface of the closing cover 15 is fixedly fitted with a handle 41. The outer surface of the handle 41 is covered with a sponge sleeve 42. The screw 46 is connected to the moving block 43 by threads. The moving block 43 is T-shaped. By setting the shape of the moving block 43, it is possible to effectively prevent the moving block 43 from shifting.

[0029] Example 2

[0030] Please see Figure 3 A movable block 43 is fixedly installed on the surface of the sampling tube 38, and a support column 44 is fixedly installed on the top of the fixed plate 1. A movable groove 45 is opened through the surface of the support column 44, and a lead screw 46 is sleeved inside the movable groove 45. A handwheel 47 is fixedly installed on the top of the lead screw 46. When the equipment is in use, first, the hand contacts the surface of the handwheel 47, and then the handwheel 47 is rotated. The rotation of the handwheel 47 drives the lead screw 46 to rotate, and then the rotation of the lead screw 46 drives the movable block 43 to move. Then, the movement of the movable block 43 drives the sampling tube 38 to move, so that sampling and testing can be carried out according to different situations.

[0031] Working Principle: When using the equipment, firstly, start the vacuum pump 19. The vacuum pump 19 creates a negative pressure environment by drawing a vacuum inside the sample collection container 14 through the connecting pipe 20. Rotate the handwheel 47 at the top of the lead screw 46. The lead screw 46 is connected to the moving block 43 on the sampling tube 38 by a thread, causing the sampling tube 38 to move downwards along the moving groove 45 of the support column 44 according to the required sampling depth until the sampling head 39 is inserted into the cement grout to the predetermined depth. Due to the negative pressure inside the sample collection container 14, the cement grout is drawn into the connecting pipe 23 through the sampling tube 38 under the action of the pressure difference. Then, it is drawn into the placement box 21 through the connecting pipe 23. Next, the residue in the grout is filtered through the filter screen 26. Then, the vacuum pump 19 moves to draw the grout into the connecting pipe 22, and then into the sample collection container 14 through the connecting pipe 22, completing the sampling operation. After sampling, turn the handwheel 47 in the reverse direction to lift the sampling tube 38 back to its original position, turn off the vacuum pump 19, open the closed cover 15 of the sample collection container 14, and take out an appropriate amount of cement grout sample from the sample collection container 14. Test the sample for various performance indicators such as consistency and strength according to the corresponding testing standards and methods. Then, start the water pump 11. The water pump 11 drives the water tank 9 to flow through the first delivery pipe 12 and the second delivery pipe 13 to the inside of the annular pipe 17. Then, the water flows out from the nozzle 18 to spray and clean the inner wall of the sample collection container 14 from all directions and multiple angles, removing residual cement grout and other impurities. Simultaneously, if the filter screen 26 in the box 21 needs cleaning, first contact it with the surface of the closed cover 24, then pull the closed cover 24. The movement of the closed cover 24 will clean the filter screen. The placement box 21 is opened, and then the pull block 33 is pulled. The pull block 33 drives the rack 32 to move, and the rack 32 meshes with the gear 31, causing the gear 31 to rotate. The movement of the pull block 33 drives the insertion post 34 to move, and then the movement of the insertion post 34 drives the tension spring 35 to stretch. Then the insertion post 34 disengages from the insertion slot 36 through movement. Then the hand comes into contact with the surface of the filter screen 26 and pulls the filter screen 26. The movement of the filter screen 26 drives the arc block 29 to squeeze, and then the movement of the arc block 29 drives the spring 28 to contract. Then the filter screen 26 can be disengaged from the fixing block 25 through movement, and can be cleaned, replaced and maintained. For components such as the sampling tube 38 and sampling head 39 that may have residual cement grout, water sprayed from the nozzle 18 can be used to rinse them to ensure that all components are clean. After self-cleaning is completed, the water pump 11 is turned off.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A cement grout sampling inspection device with self-cleaning function, comprising a fixing plate (1), characterized in that: A support plate (2) is fixedly installed at the bottom end of the fixed plate (1). A rotating column (3) is sleeved inside the support plate (2). A limit block (4) is fixedly installed on the bottom outer surface of the rotating column (3). A fixed cylinder (5) is sleeved on the outer surface of the rotating column (3). A rotating wheel (6) is sleeved on the outer surface of the rotating column (3). Threads (7) are opened inside the rotating wheel (6) and on the outer surface of the rotating column (3). A movable wheel (8) is sleeved at the bottom of the fixed cylinder (5). A water tank (9) is fixedly installed on the surface of the fixed plate (1). An input pipe (10) is fixedly installed on one side of the water tank (9). A fixed plate (1) is fixedly installed on the surface of the fixed plate (1). A water pump (11) is provided. A delivery pipe (12) is fixedly installed at one output end of the water pump (11), and a delivery pipe (13) is fixedly installed at the other output end of the water pump (11). A sample collection container (14) is fixedly installed on the surface of the fixed plate (1). A closing cover (15) is fitted onto the top of the sample collection container (14). A groove (16) is provided inside the closing cover (15). An annular tube (17) is fitted inside the groove (16). A nozzle (18) is fixedly installed on the surface of the annular tube (17). A vacuum pump (19) is fixedly installed on the surface of the fixed plate (1). A connecting pipe is fixedly installed at the output end of the vacuum pump (19). Connector 1 (20), a placement box (21) is fixedly installed on the surface of the fixing plate (1), connecting pipe 2 (22) and connecting pipe 3 (23) are fixedly installed on the surface of the placement box (21), a closing cover 2 (24) is rotatably connected to the surface of the placement box (21), a fixing block (25) is fixedly installed inside the placement box (21), a filter screen (26) is sleeved inside the fixing block (25), fixing grooves (27) are opened on the surface of the fixing block (25) and the surface of the filter screen (26), a spring (28) is sleeved inside the fixing groove (27), and an arc-shaped block (29) is sleeved inside the fixing groove (27). (25) has an operating groove (30) on its surface. A gear (31) is fitted inside the operating groove (30). A rack (32) is fitted inside the operating groove (30). A pull block (33) is fixedly installed at the rear end of the rack (32). An insertion post (34) is fixedly installed on the surface of the pull block (33). A tension spring (35) is fitted on the outer surface of the insertion post (34). An insertion groove (36) is opened on the surface of the filter screen (26). A through groove (37) is opened through the surface of the fixing plate (1). A sampling tube (38) is fitted inside the through groove (37). A sampling head (39) is fitted on the bottom outer surface of the sampling tube (38).

2. The cement grout sampling device with self-cleaning function according to claim 1, characterized in that: One end of the spring (28) is connected and fixed to the surface of the fixing groove (27), and the other end of the spring (28) is connected and fixed to the rear end surface of the arc block (29). The fixing groove (27), the spring (28) and the arc block (29) are in multiple sets and are symmetrically distributed inside the placement box (21).

3. The cement grout sampling device with self-cleaning function according to claim 1, characterized in that: One end of the tension spring (35) is connected and fixed to the surface of the pull block (33), and the other end of the tension spring (35) is connected and fixed to the surface of the fixing block (25). The number of tension springs (35) and fixing blocks (25) is four sets and they are symmetrically distributed inside the placement box (21).

4. A cement grout sampling device with self-cleaning function according to claim 1, characterized in that: The surface of the gear (31) meshes with the surface of the rack (32). There are four sets of racks (32) and they are diagonally symmetrically distributed between each pair. The sampling head (39) and the sampling tube (38) are fixedly connected by threads. A flange (40) is fixedly installed on one end of the surface of the input tube (10). The other end of the first conveying tube (12) is connected and fixed to the surface of the water tank (9). The second conveying tube (13) is made of soft material. The other end of the second conveying tube (13) is connected and fixed to the surface of the annular tube (17) inside the first closing cover (15).

5. A cement grout sampling device with self-cleaning function according to claim 1, characterized in that: The number of nozzles (18) is multiple and they are distributed in a circular pattern inside the groove (16). The bottom end of the groove (16) penetrates the bottom end of the first closed cover (15). The nozzles (18) are inclined at the angle of the annular tube (17). The vacuum pump (19) and the water pump (11) are connected and fixed to the fixing plate (1) by bolts. The second connecting pipe (22) is made of soft material.

6. A cement grout sampling device with self-cleaning function according to claim 1, characterized in that: The other end of the first connecting tube (20) is connected and fixed to the surface of the sample collection container (14), the other end of the second connecting tube (22) is connected and fixed to the surface of the sample collection container (14), the other end of the third connecting tube (23) is connected and fixed to the top of the sampling tube (38), and a handle (41) is fixedly mounted on the surface of the first closing cover (15), and a sponge sleeve (42) is fitted on the outer surface of the handle (41).

7. A cement grout sampling device with self-cleaning function according to claim 1, characterized in that: A movable block (43) is fixedly installed on the surface of the sampling tube (38), and a support column (44) is fixedly installed on the top of the fixed plate (1). A movable groove (45) is opened through the surface of the support column (44), and a screw rod (46) is sleeved inside the movable groove (45). A handwheel (47) is fixedly installed on the top of the screw rod (46).

8. A cement grout sampling device with self-cleaning function according to claim 7, characterized in that: The lead screw (46) and the moving block (43) are connected by threads, and the moving block (43) is in the shape of a "T".

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