Secondary salinization soil leacheate sampling device

Abstract

The invention belongs to the technical field of soil remediation, and discloses a secondary salinization soil leacheate sampling device which comprises a drill rod, a grouting main pipe is arranged in a sampling cavity of the drill rod, the outer wall of the grouting main pipe is communicated with a plurality of grouting branch pipes, and the grouting branch pipes are in transmission connection with a first driving assembly in the sampling cavity; the grouting branch pipe comprises an inner pipe communicating with the outer wall of the grouting main pipe, and an outer pipe in transmission connection with the first driving assembly is slidably connected to the inner pipe. A plurality of sampling barrels with openings are rotationally arranged on the outer pipe, and the sampling barrels are in transmission connection with a second driving assembly arranged on the outer pipe; and a spirally arranged cutting knife is arranged in the sampling barrel. The device is compact in structure and convenient to use, leacheate injection and later sampling can be carried out in secondary salinized soil through the same device, a sample obtained after soil leaching can be stably and effectively obtained, the influence of the sampling process on the sample is avoided, later detection and use are facilitated, and secondary salinized soil leacheate remediation is assisted to be completed.

Description

[0001] This application is a divisional application. The original application is titled "A Secondary Salinized Soil Leachate Sampling Device," with application number 202510105149.4 and filing date January 23, 2025. Technical Field

[0002] The present invention relates to the technical field of soil remediation, and in particular to a sampling device for leachate of secondary salinized soil. Background Art

[0003] In situ soil leaching refers to the application of eluents to secondary salinized soil by injection or other means, allowing the eluents to penetrate downward, pass through the contaminated zone and combine with pollutants in the soil, ultimately turning them into mobile compounds for easy removal. Sampling is an important part of the remediation process of secondary salinized soil eluates, which involves the collection and analysis of the soil and eluate after leaching to evaluate the leaching effect.

[0004] Existing sampling methods for remediation of leachate from secondary salinized soil mainly include manual excavation sampling, traditional soil samplers, and drilling sampling combined with grouting technology. However, both manual excavation and traditional soil samplers cannot avoid secondary disturbance of the soil during the sampling process, and thus cannot guarantee sampling stability, affecting the accuracy of the sampling results. As a newly emerging method for sampling leachate from secondary salinized soil, drilling sampling combined with grouting technology is complex to operate, inefficient, and has a single function of equipment, making it difficult to adapt to different soil environments and changes in leaching treatment needs.

[0005] Therefore, the present application designs a secondary salinized soil eluate sampling device to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a secondary salinized soil eluate sampling device to solve the problems existing in the above-mentioned prior art.

[0007] To achieve the above-mentioned object, the present invention provides the following solution: The present invention provides a secondary salinized soil eluate sampling device, comprising a cylindrical drill rod, a grouting main pipe for injecting soil eluate disposed within a sampling cavity of the drill rod, a plurality of longitudinally staggered and retractable grouting branches connected to the outer wall of the grouting main pipe, a first drive assembly disposed within the sampling cavity, the first drive assembly being in transmission connection with the grouting branches;

[0008] The grouting branch pipe includes an inner pipe fixedly connected to and in communication with the outer wall of the grouting main pipe, an outer pipe slidably connected to the inner pipe and drivingly connected to the first drive assembly, and the outer pipe is extended from the drill rod by the drive of the first drive assembly to inject the leaching liquid into the soil;

[0009] A plurality of sampling cylinders with open ends are rotatably mounted on the outer tube, the sampling cylinders are drivingly connected to a second drive assembly mounted on the outer tube, and the second drive assembly abuts against the inner wall of the sampling cavity;

[0010] The sampling cylinder is provided with a spirally arranged cutting knife.

[0011] Preferably, the first drive assembly includes a plurality of longitudinally rotatable active screws connected to the sampling chamber, the active screws are transmission-connected to a plurality of laterally arranged driven screws, the driven screws are threadedly connected with a drive plate, and the drive plate is fixed to one end of the outer tube facing the grouting main pipe.

[0012] Preferably, a first drive groove is provided at the top of the drill rod, a drive disk coaxially arranged with the grouting main pipe is rotatably connected in the first drive groove, the inner ring of the drive disk is engaged with a plurality of drive gears, and the active screw extends into the first drive groove and is engaged with the drive gears for transmission.

[0013] Preferably, a receiving groove is provided at the top end of the driving disc, and a control rod is hinged at one end of the receiving groove, and the control rod is adapted to and detachably connected to the receiving groove.

[0014] Preferably, the second driving assembly includes a plurality of clearance grooves provided in the outer tube, wherein a driving block is slidably connected in the clearance groove. The driving block is tilted away from the side of the inner tube and abuts against the closed bottom end of the sampling tube for transmission.

[0015] Preferably, the second drive assembly includes a second drive groove opened on the outer tube and arranged corresponding to the give way groove, a power block is slidably arranged in the second drive groove, the power block is connected to the drive block through a transmission rod, and the power block extends out of the second drive groove and is arranged to abut the inner wall of the drill rod.

[0016] Preferably, the outer wall of the outer tube is provided with a sampling groove which is arranged corresponding to and connected to the give way groove, and the sampling barrel is rotatably connected in the sampling groove; the side wall of the sampling groove is provided with an arc-shaped guide groove, and a spirally arranged guide bar is slidably connected in the guide groove, and the guide bar is fixed around the outer wall of the sampling barrel.

[0017] Preferably, a reset groove is provided on the outer tube, and the reset groove and the second drive groove are correspondingly arranged and connected to the side wall of the drive block, and a reset spring in a stretched state is fixed in the reset groove, and the end of the reset spring extends out of the reset groove and is fixed to the side wall of the power block.

[0018] Preferably, a plurality of partition plates are provided in the sampling chamber, the grouting main pipe and the active screw pass through the partition plates respectively, and the plurality of partition plates divide the sampling chamber into a plurality of storage chamber layers, and the connection point between the inner tube and the grouting main pipe is located in the storage chamber.

[0019] Preferably, a plurality of discharge holes are occasionally provided through the side wall of the drill rod, and the discharge holes are located at the bottom end of the side wall of the storage cavity, and the discharge holes are sealed with a detachable sealing plug.

[0020] Compared with the prior art, the present invention has the following advantages and technical effects: the present invention discloses a device for sampling leachate from secondary salinized soil, comprising a cylindrical drill rod with a sampling cavity inside the drill rod, a grouting main pipe and a plurality of grouting branches arranged in the sampling cavity, the device penetrates into the soil through the drill rod, and the grouting main pipe and the grouting branches inject leachate, which is convenient for repairing the secondary salinized soil; the grouting branches are retractable and driven by a first driving component, when the leachate is injected, the first driving component drives the outer pipe of the grouting branch pipe to extend out of the drill rod, and the leachate is injected into the secondary salinized soil through the outer pipe, and when not in use, the outer pipe can be driven to retract, so that the grouting branch pipe is retracted in the inner cavity of the drill rod, avoiding being affected when the drill rod is drilled in and out, thereby ensuring the grouting efficiency and quality of the leachate; a sampling barrel is rotatably arranged on the outer pipe, the sampling barrel is transmission-connected to the second driving component, and a spirally arranged cutting knife is arranged in the sampling barrel, when When sampling is not being carried out, the sampling tube is retracted on the outer tube to avoid affecting the drilling out of the outer tube. When sampling is being carried out, the second driving assembly drives the sampling tube to rotate. The sampling tube extends out of the outer wall of the outer tube while rotating and drills into the soil near the outer tube to achieve sampling. It is flexible and convenient, so that sampling and grouting can be carried out at different times through the same equipment, and it has strong applicability. When the sampling tube is rotated and extended, the spiral cutting knife in the inner cavity cuts the soil, and the soil sample is cut into pieces and sent into the inner cavity of the sampling tube, so that the taken sample is separated from the original soil layer, ensuring the stability of sampling. At the same time, when the sampling tube retracts after sampling, the cutting knife cannot cut the soil due to the reverse rotation, and the sampling tube no longer rotates after being reset. The reversal and stoppage cause the spiral cutting knife to seal the mouth of the sampling tube, avoiding damage or loss of the sample to affect the accuracy of sampling, and facilitating understanding the effect of the secondary salinization soil washing solution treatment from the sample.

[0021] The present invention realizes the functions of simultaneous eluent injection and post-sampling on the same equipment through compact structural design and innovative grouting and sampling mechanism. It can not only stably and effectively obtain soil samples after elution and avoid the influence of the sampling process on the samples, but also ensure the accuracy and stability of sampling through flexible sampling tube design and cutting knife arrangement. It is easy to operate and has strong adaptability. It can be widely used in different soil environments and elution treatment requirements, providing strong technical support for the remediation of secondary salinized soil eluent. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:

[0023] Figure 1 This is an axial view of the secondary salinized soil eluate sampling device of the present invention;

[0024] Figure 2 This is a schematic structural diagram of the secondary salinized soil eluate sampling device of the present invention;

[0025] Figure 3 For the present invention Figure 2 A partial enlarged view of middle A;

[0026] Figure 4 This is a schematic diagram of the cross section of the grouting branch pipe of the present invention;

[0027] Figure 5 For the present invention Figure 4 A partial enlarged view of B in the middle;

[0028] Figure 6 This is a schematic diagram of the outer tube structure of the present invention;

[0029] Figure 7 For the present invention Figure 6 A partial enlarged view of center C;

[0030] Figure 8 This is a schematic structural diagram of the sampling tube of the present invention;

[0031] Figure 9 This is a schematic diagram of the reset turntable of the present invention;

[0032] Figure 10 This is a schematic diagram of the top view of the drive disk of the present invention;

[0033] Figure: 1, drill rod; 2, grouting main pipe; 3, grouting branch pipe; 4, first drive assembly; 5, inner pipe; 6, outer pipe; 7, slurry outlet; 8, through hole; 9, sampling tube; 10, cutting knife; 11, driving screw; 12, driven screw; 13, driving plate; 14, driving gear; 15, driven gear; 16, first drive slot; 17, driving plate; 18, driving gear; 19, receiving slot; 20, control lever; 21, top plate; 22, clearance slot ; 23. Drive block; 24. Second drive slot; 25. Power block; 26. Sampling slot; 27. Guide slot; 28. Guide bar; 29. Transmission slot; 30. Transmission rod; 31. Reset slot; 32. Reset spring; 33. Partition plate; 34. Storage chamber; 35. Discharge hole; 36. Sealing plug; 37. Sealing plate; 38. Fixing rod; 39. Sampling cutting edge; 40. First drill bit; 41. Second drill bit; 42. Reset turntable; 43. Pull spring. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] The secondary salinized soil mentioned in this application refers to the phenomenon in which soil salt accumulates due to unreasonable irrigation, poor drainage or natural factors, which in turn affects crop growth and land productivity. For the treatment of secondary salinized soil, leaching is a commonly used technical means. By injecting leaching liquid into the soil, the accumulated salt is dissolved and discharged with the water flow, thereby improving the soil environment. Effectively collecting and testing treated soil samples can accurately evaluate the treatment effect of the leaching liquid.

[0037] The existing methods for sampling leachate from secondary salinized soil are mainly as follows:

[0038] Manual excavation sampling: Soil samples are obtained by manual excavation. This method is simple to operate, but the sampling depth is limited and it is easily interfered with by human factors, resulting in inaccurate sampling results.

[0039] Traditional soil samplers: Sampling is done using specialized soil samplers, such as soil augers and soil sampling tubes. Although these samplers can penetrate the soil to a certain depth, sampling in soil that has been leached can be difficult due to changes in soil structure. Furthermore, the sampling process can easily cause secondary disturbances to the soil, affecting the accuracy of the sampling results.

[0040] Drilling sampling combined with grouting technology: Some technologies attempt to sample by drilling and combining grouting technology, but this method often requires grouting and sampling to be carried out separately. Not only is the operation complicated, but the grouting process may also cause soil contamination, affecting the accuracy of subsequent sampling.

[0041] The above-mentioned prior art has the following deficiencies in sampling leachate from secondary salinized soil:

[0042] Insufficient sampling accuracy: Whether it is manual excavation or traditional soil samplers, it is difficult to avoid secondary disturbance of the soil during the sampling process, which affects the accuracy of the sampling results.

[0043] Complex operation: Although some technologies combine grouting and sampling functions, they often need to be performed separately, which makes the operation complicated and inefficient.

[0044] Poor equipment adaptability: Sampling equipment in existing technologies often has a single function and is difficult to adapt to changes in different soil environments and leaching treatment requirements.

[0045] Difficulty in ensuring sampling stability: During the sampling process, how to ensure the stability of sampling and prevent the sample from being affected by inappropriate times is an urgent problem to be solved.

[0046] Therefore, in response to the above technical problems, the present application designs a secondary salinization soil eluate sampling device to solve these problems.

[0047] Reference Figures 1-10 As shown, this embodiment provides a secondary salinized soil leachate sampling device, comprising a cylindrical drill rod 1, a grouting main pipe 2 for injecting soil leachate is provided in the sampling cavity of the drill rod 1, the outer wall of the grouting main pipe 2 is connected with a plurality of longitudinally staggered and retractable grouting branches 3, a first drive assembly 4 is provided in the sampling cavity, and the first drive assembly 4 is transmission-connected to the grouting branch pipe 3; the grouting branch pipe 3 includes an inner pipe 5 fixedly connected to and connected to the outer wall of the grouting main pipe 2, an outer pipe 6 transmission-connected to the first drive assembly 4 is slidingly connected to the inner pipe 5, the outer pipe 6 is extended out of the drill rod 1 by the drive of the first drive assembly 4, and is used for injecting leachate into the soil; a plurality of open-ended sampling barrels 9 are rotatably provided on the outer pipe 6, the sampling barrel 9 is transmission-connected to the second drive assembly provided on the outer pipe 6, and the second drive assembly abuts against the inner wall of the sampling cavity; a spirally arranged cutting knife 10 is provided in the sampling barrel 9.

[0048] The present invention discloses a device for sampling leachate from secondary salinized soil, comprising a cylindrical drill rod 1 with a sampling cavity inside the drill rod 1, a grouting main pipe 2 and a plurality of grouting branches 3 being arranged in the sampling cavity, the device penetrates into the soil through the drill rod 1, and the grouting main pipe 2 and the grouting branches 3 are injected with leachate, so as to facilitate the repair of the secondary salinized soil; the grouting branches 3 are retractable and driven by a first driving component 4, when the leachate is injected, the first driving component 4 drives the outer tube 6 of the grouting branch 3 to extend out of the drill rod 1, and the leachate is injected into the secondary salinized soil through the outer tube 6, and when not in use, the outer tube 6 can be driven to retract, so that the grouting branch 3 is retracted in the inner cavity of the drill rod 1, so as to avoid being affected when the drill rod 1 is drilled in and out, thereby ensuring the grouting efficiency and quality of the leachate; a sampling barrel 9 is rotatably arranged on the outer tube 6, the sampling barrel 9 is transmission-connected to the second driving component, and a spirally arranged cutting knife 10 is arranged in the sampling barrel 9, and when not sampling, the sampling barrel 9 The second driving assembly drives the sampling barrel 9 to rotate, and the sampling barrel 9 extends out of the outer wall of the outer tube 6 while rotating, and drills into the soil near the outer tube 6 to realize sampling, which is flexible and convenient, so that sampling and grouting can be carried out at different times through the same equipment, and has strong applicability; and when the sampling barrel 9 is rotated and extended, the spiral cutting knife 10 in the inner cavity cuts the soil, and the soil sample is cut into pieces and sent into the inner cavity of the sampling barrel 9, so that the taken sample is separated from the original soil layer, ensuring the stability of sampling; at the same time, when the sampling barrel 9 retracts after sampling, the cutting knife 10 cannot cut the soil due to the reverse rotation, and the sampling barrel 9 no longer rotates after being reset, and the reversal and stop rotation cause the spiral cutting knife 10 to seal the mouth of the sampling barrel 9, avoiding damage or loss of the sample to affect the accuracy of sampling, and facilitating understanding the effect of the secondary salinization soil washing solution treatment from the sample. The present invention realizes the functions of simultaneous eluent injection and post-sampling on the same equipment through compact structural design and innovative grouting and sampling mechanism. It can not only stably and effectively obtain soil samples after elution and avoid the influence of the sampling process on the samples, but also ensure the accuracy and stability of sampling through flexible sampling tube 9 design and cutting knife 10 arrangement. It is easy to operate and has strong adaptability. It can be widely used in different soil environments and elution treatment requirements, providing strong technical support for the remediation of secondary salinized soil eluent.

[0049] In one embodiment of the present application, a conical first drill bit 40 is provided on the bottom end of the drill rod 1 to facilitate drilling the drill rod 1 into the ground.

[0050] In one embodiment of the present application, the outer wall of the drill rod 1 is provided with a plurality of through holes 8 adapted to the outer tube 6 , so as to facilitate the outer tube 6 to extend out of the drill rod 1 from the through holes 8 .

[0051] In one embodiment of the present application, a conical second drill bit 41 is provided at the end of the outer tube 6 away from the grouting main tube 2, so as to facilitate the outer tube 6 to extend out of the drill rod 1 and drill into the soil on the side, thereby facilitating the injection of leachate to repair the compacted secondary salinized soil.

[0052] In one embodiment of the present application, the second drill bit 41 is provided with a plurality of slurry outlet holes 7 that are opened one-way outward, so as to facilitate the injection of the eluent into the secondary salinized soil for soil remediation.

[0053] In one embodiment of the present application, a sealing plate 37 is provided at the bottom end of the grouting main pipe 2 to seal the bottom end of the grouting main pipe 2 .

[0054] A further optimized solution is that the first drive assembly 4 includes a plurality of active screws 11 that are longitudinally rotatably connected to the sampling chamber. The active screws 11 are transmission-connected to a plurality of transversely arranged driven screws 12. The driven screws 12 are threadedly connected to drive plates 13, and the drive plates 13 are fixedly connected to the end of the outer tube 6 facing the grouting main pipe 2. The first drive assembly 4 includes active screws 11, driven screws 12, and drive plates 13. The active screws 11 and driven screws 12 are transmission-arranged, and the drive plates 13 threadedly connected to the driven screws 12 are fixedly connected to the outer tube 6. When it is necessary to control the movement of the outer tube 6 on the inner tube 5, the active screws 11 are rotated to drive the driven screws 12 to rotate, thereby driving the drive plates 13 to push the outer tube 6 to move horizontally. This can accurately control the extension and contraction of the grouting branch pipe 3, so that it extends out of the drill pipe 1 when injecting eluent and sampling, and retracts into the inner cavity of the drill pipe 1 when drilling in and out, avoiding mutual influence.

[0055] In one embodiment of the present application, a driving gear 14 is provided on the driving screw 11 , and a driven gear 15 meshing with the driving gear 14 is provided on the driven screw 12 , thereby facilitating transmission between the driving screw 11 and the driven screw 12 .

[0056] In one embodiment of the present application, the driving gear 14 and the driven gear 15 may be selected from a combination including but not limited to a matching bevel gear set or a worm gear combination, and those skilled in the art may select the same according to their needs.

[0057] A further optimized solution is provided, in which a first drive slot 16 is provided at the top of the drill rod 1. A drive disc 17 coaxially arranged with the grouting main pipe 2 is rotatably connected in the first drive slot 16. The inner ring of the drive disc 17 is meshed with a plurality of drive gears 18. The active screw 11 extends into the first drive slot 16 and meshes with the drive gears 18 for transmission. A top plate 21 is provided at the top of the drill rod 1. The top plate 21 is provided with a first drive slot 16. The first drive slot 16 is provided with a meshed drive disc 17 and drive gears 18. The drive gears 18 are in transmission connection with the active screw 11. When the outer tube 6 needs to be controlled for telescopic and translational movement, the drive disc 17 is rotated, and power is transmitted to the drive gears 18 through the drive disc 17, thereby driving the active screw 11 to rotate. The telescopic and translational movement of the outer tube 6 can be controlled by the mechanical structure when the drill rod 1 is drilled into the ground. No additional electricity is required, which is convenient for use in the event of a power outage in the field and has high reliability.

[0058] In a further optimization, a receiving slot 19 is provided at the top of the drive disc 17, with a control lever 20 hingedly connected to one end of the receiving slot 19. The control lever 20 is adapted to and detachably connected to the receiving slot 19. The end of the control lever 20 is hingedly connected to the end of the receiving slot 19, allowing the control lever 20 to be locked and removed from the receiving slot 19. When the drive disc 17 needs to be rotated, the control lever 20 is pulled open to facilitate the application of force to rotate the drive disc 17. When not in use, the control lever 20 is retracted into the receiving slot 19 so that it does not protrude, thereby preventing it from being affected during transportation and storage.

[0059] As a further optimization solution, the second drive assembly includes a plurality of clearance grooves 22 provided in the outer tube 6. A drive block 23 is slidably connected in the clearance grooves 22. The drive block 23 is tilted away from the side of the inner tube 5 and abuts against the closed bottom end of the sampling tube 9 for transmission. The second drive assembly includes the clearance grooves 22 and the drive block 23. The drive block 23 is slidably connected in the clearance grooves 22. The inclined surface of the top end of the drive block 23 abuts against the bottom end of the sampling tube 9 for transmission. When the drive block 23 slides in the clearance grooves 22, the thickness of the location where it contacts the sampling tube 9 gradually increases, pushing the sampling tube 9 to rotate and extend, completing sampling. The structure is simple and can effectively drive the sampling tube 9 to rotate and sample.

[0060] To further optimize the solution, the second drive assembly includes a second drive groove 24 opened on the outer tube 6 and arranged corresponding to the give way groove 22. A power block 25 is slidably arranged in the second drive groove 24. The power block 25 is connected to the drive block 23 through a transmission rod 30. The power block 25 extends out of the second drive groove 24 and is arranged to abut the inner wall of the drill pipe 1. The second drive assembly also includes a second drive slot 24, a power block 25 and a transmission rod 30. The power block 25 is connected to the drive block 23 through the transmission rod 30. At the same time, the power block 25 extends out of the second drive slot 24 and abuts against the inner wall of the drill pipe 1, providing power for the movement of the power block 25; when the eluent is injected but not sampled, the length of the drill pipe 1 extended by the outer tube 6 is based on the fact that the power block 25 does not contact the inner wall of the drill pipe 1. There is no interaction between the power block 25 and the inner wall of the drill pipe 1, and no impact will be generated; when sampling is required, the outer tube 6 is extended outward again, so that the power block 25 moves under the push of the inner wall of the drill pipe 1, and the power block 25 drives the drive block 23 to slide through the transmission rod 30 sliding in the transmission slot 29, driving the sampling tube 9 to take samples, thereby improving the integration and efficiency of the device.

[0061] As a further optimization, the outer wall of the outer tube 6 is provided with a sampling groove 26 corresponding to and connected to the clearance groove 22, and the sampling barrel 9 is rotatably connected in the sampling groove 26; the side wall of the sampling groove 26 is provided with an arc-shaped guide groove 27, and a spirally arranged guide bar 28 is slidably connected in the guide groove 27. The guide bar 28 surrounds and is fixedly connected to the outer wall of the sampling barrel 9. The outer wall of the outer tube 6 is provided with a sampling groove 26, and the sampling barrel 9 is rotatably connected in the sampling groove 26; the side wall of the sampling groove 26 is provided with a guide groove 27, and the outer wall of the sampling barrel 9 is provided with a guide bar 28. The guide bar 28 slides in the guide groove 27, so that when the sampling barrel 9 is forced to move outward, it will rotate synchronously. At the same time, when the sampling barrel 9 rotates under the push of the driving block 23, the guide bar 28 slides in the guide groove 27 to maintain stability, facilitating the synchronous rotation of the sampling barrel 9 when it extends out of the sampling groove 26, completing rotational sampling.

[0062] In one embodiment of the present application, the bottom end of the sampling tube 9 is rotatably connected to a reset turntable 42, which slides in the sampling slot 26 but does not rotate. A number of pulling springs 43 are arranged between the bottom end of the reset turntable 42 and the bottom end of the sampling slot 26. The inclined surface of the driving block 23 abuts against the bottom end of the reset turntable 42, pushing the reset turntable 42 to slide in the sampling slot 26, and then pushing the sampling tube 9 to rotate and extend for sampling; after the sampling is completed, the driving block 23 automatically resets, and the stretched pulling spring 43 pulls the reset turntable 42 to move into the sampling slot 26 to reset, driving the sampling tube 9 to rotate and retract into the sampling slot 26 to complete the sampling.

[0063] In one embodiment of the present application, a sampling blade 39 is provided at the open position of the sampling tube 9, which facilitates cutting off the connection between the target sample and the surrounding soil layer, thereby improving the efficiency and success rate of sampling. At the same time, the rotating sampling blade 39 is more convenient for cutting into the soil layer, reducing the difficulty of cutting.

[0064] In one embodiment of the present application, a fixing rod 38 is detachably provided in the sampling tube 9, and a spiral cutting knife 10 is arranged around the fixing rod 38 to form a whole. After sampling, the fixing rod 38 and the cutting knife 10 can be removed to facilitate the removal of the soil sample in the sampling tube 9.

[0065] As a further optimization, a reset groove 31 is provided on the outer tube 6. This reset groove 31 corresponds to and communicates with the side wall of the second drive groove 24 facing the drive block 23. A return spring 32 is fixedly connected within the reset groove 31, and its end extends out of the reset groove 31 and is fixedly connected to the side wall of the power block 25. The reset groove 31 and the side wall of the second drive groove 24 facing the drive block 23 contain a return spring 32, which is connected to the power block 25 and maintains the power block 25 in a stable state when not subject to external forces. When the power block 25 is pushed by an external force, the return spring 32 is stretched. When the external force disappears, the return spring 32 resets the power block 25, and thus resets the drive block 23, preventing interference with the retraction of the sampling tube 9 and improving the reliability of the device.

[0066] A further optimized solution is to provide a number of partition plates 33 within the sampling chamber, through which the grouting main pipe 2 and the active screw 11 respectively pass. The partition plates 33 divide the sampling chamber into several layers of storage chambers 34, and the connection point between the inner tube 5 and the grouting main pipe 2 is located within the storage chamber 34. The partition plates 33 provided within the sampling chamber divide the sampling chamber into several layers of storage chambers 34, making it convenient to separately store soil eluent samples at different depths and to facilitate subsequent analysis and comparison of the soil remediation status at different depths; the grouting main pipe 2 and the active screw 11 pass through the partition plates 33 and ensure sealing to avoid affecting the operation of the equipment; the connection point between the inner tube 5 and the grouting main pipe 2 at the same layer is located in an independent storage chamber 34, and the soil eluent after external reaction can enter the storage chambers 34 at different layers through the gap between the through hole 8 and the outer tube 6, realizing layered sampling, and sampling the soil treated with the eluent at each layer.

[0067] In one embodiment of the present application, a plurality of liquid inlet holes for sampling the eluent may be provided on the outer wall of the drill rod 1 , and the liquid inlet holes are respectively connected to different storage chambers 34 for sampling.

[0068] In one embodiment of the present application, a filter screen for filtering soil is provided in the liquid inlet hole to prevent soil from entering the storage chamber 34 .

[0069] As a further optimization, the sidewall of the drill rod 1 is provided with a plurality of discharge holes 35, which are located at the bottom end of the sidewall of the storage chamber 34. The discharge holes 35 are provided on the sidewall of the drill rod 1 and are located at the bottom end of the storage chamber 34. These discharge holes 35 can be used to discharge the stored eluent sample. The seals 36 provided in the discharge holes 35 are removable. When the eluent sample in the storage chamber 34 needs to be discharged, the seals 36 are removed, and the eluent sample is discharged through the discharge holes 35. This facilitates the discharge of the soil sample after sampling, improving the practicality and convenience of the device.

[0070] In one embodiment of the present application, the partition plate 33 is arc-shaped, so that the storage chamber 34 can be designed to be inclined from the middle to the surrounding areas, which facilitates the complete discharge of the eluent sample and avoids the accumulation of the eluent sample.

[0071] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0072] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A sampling device for secondary salinized soil eluate, characterized by: The invention comprises a cylindrical drill rod (1), a grouting main pipe (2) for injecting soil washing liquid is arranged in a sampling cavity of the drill rod (1), the outer wall of the grouting main pipe (2) is connected to a plurality of longitudinally staggered and retractable grouting branches (3), a first drive assembly (4) is arranged in the sampling cavity, and the first drive assembly (4) is in transmission connection with the grouting branches (3); The grouting branch pipe (3) comprises an inner pipe (5) fixedly connected to and in communication with the outer wall of the grouting main pipe (2); an outer pipe (6) in transmission connection with the first drive assembly (4) is slidably connected to the inner pipe (5); the outer pipe (6) is extended from the drill rod (1) by the drive of the first drive assembly (4) and is used to inject a leaching liquid into the soil; A plurality of open sampling cylinders (9) are rotatably provided on the outer tube (6), the sampling cylinders (9) are in transmission connection with a second drive assembly provided on the outer tube (6), and the second drive assembly abuts against the inner wall of the sampling cavity; The sampling cylinder (9) is provided with a spirally arranged cutting knife (10); The first driving assembly (4) includes a plurality of active screws (11) longitudinally rotatably connected to the sampling cavity, the active screws (11) are drivingly connected to a plurality of transversely arranged driven screws (12), the driven screws (12) are threadedly connected to drive plates (13), and the drive plates (13) are fixedly connected to one end of the outer tube (6) facing the grouting main tube (2); A first driving groove (16) is provided at the top end of the drill rod (1), a driving disc (17) coaxially arranged with the grouting main pipe (2) is rotatably connected in the first driving groove (16), the inner ring of the driving disc (17) is meshed with a plurality of driving gears (18), and the active screw (11) extends into the first driving groove (16) and meshes with the driving gears (18) for transmission; A plurality of partition plates (33) are provided in the sampling cavity, the grouting main pipe (2) and the active screw (11) respectively pass through the partition plates (33), and the plurality of partition plates (33) divide the sampling cavity into a plurality of storage chambers (34). The connection point between the inner tube (5) and the grouting main pipe (2) is located in the storage chamber (34).

2. The device according to claim 1, characterized in that: The top end of the driving disc (17) is provided with a receiving groove (19), one end of the receiving groove (19) is hinged with a control rod (20), and the control rod (20) is adapted to the receiving groove (19) and is detachably connected.

3. The device according to claim 1, characterized in that: The second driving assembly includes a plurality of clearance grooves (22) provided in the outer tube (6), wherein a driving block (23) is slidably connected in the clearance grooves (22), and the driving block (23) is tilted away from the side of the inner tube (5) and abuts against the closed bottom end of the sampling tube (9) for transmission.

4. The device according to claim 3, characterized in that: The second drive assembly comprises a second drive groove (24) provided on the outer tube (6) and corresponding to the clearance groove (22); a power block (25) is slidably provided in the second drive groove (24); the power block (25) is transmission-connected to the drive block (23) via a transmission rod (30); the power block (25) extends out of the second drive groove (24) and is abutted against the inner wall of the drill rod (1).

5. The device according to claim 3, characterized in that: The outer wall of the outer tube (6) is provided with a sampling groove (26) corresponding to and connected to the clearance groove (22), and the sampling barrel (9) is rotatably connected in the sampling groove (26); the side wall of the sampling groove (26) is provided with an arc-shaped guide groove (27), and a spirally arranged guide bar (28) is slidably connected in the guide groove (27), and the guide bar (28) is fixedly connected to the outer wall of the sampling barrel (9).

6. The device according to claim 4, characterized in that: The outer tube (6) is provided with a reset groove (31), and the reset groove (31) and the second driving groove (24) are correspondingly arranged and connected to the side wall of the driving block (23). A reset spring (32) in a stretched state is fixedly connected in the reset groove (31), and the end of the reset spring (32) extends out of the reset groove (31) and is fixedly connected to the side wall of the power block (25).

7. The device according to claim 1, characterized in that: A plurality of discharge holes (35) are occasionally formed through the side wall of the drill rod (1), and the discharge holes (35) are located at the bottom end of the side wall of the storage cavity (34). A detachable sealing plug (36) is sealed in the discharge holes (35).

8. Use of the soil eluate sampling device according to any one of claims 1 to 7 in field sampling of eluate from secondary salinized soil.

Images