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

Technical Field

[0001] The invention relates to the technical field of soil remediation, and in particular to a sampling device for secondary salinized soil eluent. Background Art

[0002] In situ soil leaching refers to the application of elution agents to secondary salinized soil by injection or other means, so that the elution agents penetrate downward, pass through the contaminated zone and combine with pollutants in the soil, eventually turning them into mobile compounds for easy removal. Sampling is an important part of the remediation process of secondary salinized soil elution, which involves the collection and analysis of soil and elution fluid after leaching to evaluate the leaching effect.

[0003] Existing sampling methods for remediation of leaching solutions 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 leaching solutions from secondary salinized soil, drilling sampling combined with grouting technology is complex to operate, inefficient, and has a single function, making it difficult to adapt to changes in different soil environments and leaching treatment requirements.

[0004] Therefore, the present application designs a secondary salinization soil eluate sampling device to solve the above-mentioned technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide a secondary salinized soil elution sampling device to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above-mentioned object, the present invention provides the following scheme: The present invention provides a secondary salinized soil elution sampling device, comprising a cylindrical drill rod, a grouting main pipe for injecting soil elution is arranged in a sampling cavity of the drill rod, the outer wall of the grouting main pipe is connected with a plurality of longitudinally staggered and retractable grouting branches, a first driving assembly is arranged in the sampling cavity, and the first driving assembly is in driving connection with the grouting branch pipe; The grouting branch pipe comprises an inner pipe fixedly connected to and communicated with the outer wall of the grouting main pipe, an outer pipe drivingly connected to the first driving assembly is slidably connected to the inner pipe, and the outer pipe is extended out of the drill rod by the driving of the first driving assembly to inject a leaching liquid into the soil; A plurality of open sampling tubes are rotatably arranged on the outer tube, the sampling tubes are drivingly connected to a second driving assembly arranged on the outer tube, and the second driving assembly abuts against the inner wall of the sampling cavity; The sampling tube is provided with a spirally arranged cutting knife.

[0007] Preferably, the first driving assembly includes a plurality of active screws longitudinally rotatably connected to the sampling cavity, the active screws are transmission-connected to a plurality of laterally arranged driven screws, the driven screws are threadedly connected to drive plates, and the drive plates are fixedly connected to one end of the outer tube facing the grouting main tube.

[0008] Preferably, a first driving groove is provided at the top of the drill rod, a driving disc coaxially arranged with the grouting main pipe is rotatably connected in the first driving groove, the inner ring of the driving disc is meshed with a plurality of driving gears, and the active screw extends into the first driving groove and meshes with the driving gears for transmission.

[0009] Preferably, a receiving groove is provided at the top end of the driving disk, 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.

[0010] 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 grooves, and the driving block is tilted away from the side surface of the inner tube and abuts against the closed bottom end of the sampling tube for transmission.

[0011] Preferably, the second driving assembly includes a second driving groove opened on the outer tube and arranged corresponding to the give way groove, a power block is slidably arranged in the second driving groove, the power block is transmission-connected to the driving block through a transmission rod, and the power block extends out of the second driving groove and is arranged to abut against the inner wall of the drill pipe.

[0012] 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 strip is slidably connected in the guide groove, and the guide strip is surrounded and fixedly connected to the outer wall of the sampling barrel.

[0013] 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 fixedly connected in the reset groove, and the end of the reset spring extends out of the reset groove and is fixedly connected to the side wall of the power block.

[0014] Preferably, a plurality of partition plates are provided in the sampling cavity, the grouting main pipe and the active screw respectively pass through the partition plates, the plurality of partition plates divide the sampling cavity into a plurality of storage chambers, and the connection point between the inner tube and the grouting main pipe is located in the storage chamber.

[0015] Preferably, a plurality of discharge holes are occasionally formed through the side wall of the drill rod, the discharge holes are located at the bottom end of the side wall of the storage cavity, and a detachable sealing plug is sealed in the discharge holes.

[0016] Compared with the prior art, the present invention has the following advantages and technical effects: the present invention discloses a device for sampling leachate in secondary salinized soil, comprising a cylindrical drill rod, a sampling cavity in the drill rod, a grouting main pipe and a plurality of grouting branches in the sampling cavity, the device penetrates into the soil through the drill rod, and the grouting main pipe and the grouting branches are injected with leachate, so as to facilitate the repair of the secondary salinized soil; the grouting branches are retractable and driven by a first driving assembly, when the leachate is injected, the first driving assembly drives the outer pipe of the grouting branch 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 is contracted in the inner cavity of the drill rod, so as to avoid being affected when the drill rod is drilled in and taken 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 assembly, and a spirally arranged cutting knife is arranged in the sampling barrel, when When sampling is not performed, the sampling tube is retracted on the outer tube to avoid affecting the drilling of the outer tube. When sampling is performed, the second driving component 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. This is flexible and convenient, so that sampling and grouting can be performed at different times through the same equipment, and the applicability is strong. 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, thereby 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, thereby avoiding damage or loss of the sample to affect the accuracy of sampling, and facilitating understanding of the effect of the secondary salinization soil washing solution treatment from the sample.

[0017] 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, which 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. The present invention is easy to operate and has strong adaptability. It can be widely used in different soil environments and elution treatment needs, and provides strong technical support for the restoration of secondary salinized soil eluent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1This is an axial view of the sampling device for secondary salinized soil eluate of the present invention; Figure 2 This is a schematic diagram of the structure of the secondary salinized soil eluate sampling device of the present invention; Figure 3 For the present invention Figure 2 A partial enlarged view of middle A; Figure 4 It is a schematic diagram of the cross section of the grouting branch pipe of the present invention; Figure 5 For the present invention Figure 4 A partial enlarged view of B in the middle; Figure 6 This is a schematic diagram of the outer tube structure of the present invention; Figure 7 For the present invention Figure 6 A partial enlarged view of middle C; Figure 8 This is a schematic diagram of the structure of the sampling tube of the present invention; Fig. 9 This is a schematic diagram of the reset turntable of the present invention; Fig.10 This is a schematic diagram of the top view of the drive disk of the present invention; In the figure: 1, drill rod; 2, grouting main pipe; 3, grouting branch pipe; 4, first drive assembly; 5, inner pipe; 6, outer pipe; 7, grouting hole; 8, through hole; 9, sampling tube; 10, cutting knife; 11, active screw; 12, driven screw; 13, driving plate; 14, active gear; 15, driven gear; 16, first drive groove; 17, driving plate; 18, driving gear; 19, receiving groove; 20, control rod; 21, top plate; 22, clearance groove ; 23. Drive block; 24. Second drive slot; 25. Power block; 26. Sampling slot; 27. Guide slot; 28. Guide strip; 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

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0020] 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.

[0021] The secondary salinized soil mentioned in this application refers to the phenomenon that 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 the treated soil samples can accurately evaluate the treatment effect of the leaching liquid.

[0022] The existing methods for sampling secondary salinized soil elution are mainly as follows: Manual excavation sampling: Soil samples are obtained by manual excavation. This method is easy to operate, but the sampling depth is limited and it is easily interfered by human factors, resulting in inaccurate sampling results.

[0023] Traditional soil sampler: Sampling is done using a special soil sampler, such as a soil drill, soil sampling tube, etc. Although these samplers can penetrate into the soil to a certain depth, when sampling in soil after leaching treatment, it is easy to cause sampling difficulties due to changes in soil structure, and the soil is easily disturbed during the sampling process, affecting the accuracy of the sampling results.

[0024] 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.

[0025] The above-mentioned prior art has the following deficiencies in sampling the secondary salinized soil eluate: 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.

[0026] Complex operation: Although some technologies combine grouting and sampling functions, they often need to be performed separately, which makes the operation complicated and inefficient.

[0027] 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.

[0028] It is difficult to ensure sampling stability: During the sampling process, how to ensure the stability of sampling and avoid the samples being affected by inappropriate times is an urgent problem to be solved.

[0029] Therefore, in response to the above technical problems, the present application designs a secondary salinization soil elution sampling device to solve these problems.

[0030] Reference Figure 1-Figure 10 As shown, this embodiment provides a secondary salinized soil eluate sampling device, comprising a cylindrical drill rod 1, a grouting main pipe 2 for injecting soil eluate is arranged 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 driving assembly 4 is arranged in the sampling cavity, and the first driving assembly 4 is in transmission connection with the grouting branches 3; The grouting branch pipe 3 includes an inner pipe 5 fixedly connected to and communicated with the outer wall of the grouting main pipe 2, and an outer pipe 6 drivingly connected to the first driving assembly 4 is slidably connected to the inner pipe 5. The outer pipe 6 is extended out of the drill rod 1 by the driving of the first driving assembly 4, and is used to inject the elution liquid into the soil; A plurality of open sampling tubes 9 are rotatably arranged on the outer tube 6, and the sampling tubes 9 are transmission-connected to a second driving assembly arranged on the outer tube 6, and the second driving assembly abuts against the inner wall of the sampling cavity; The sampling tube 9 is provided with a spirally arranged cutting knife 10 .

[0031] The invention discloses a secondary salinized soil elution sampling device, comprising a cylindrical drill rod 1, a sampling cavity in the drill rod 1, a grouting main pipe 2 and a plurality of grouting branch pipes 3 arranged in the sampling cavity, the device penetrates into the soil through the drill rod 1, the grouting main pipe 2 and the grouting branch pipes 3 are injected with elution, so as to facilitate the repair of the secondary salinized soil; the grouting branch pipes 3 are retractable and driven by a first driving assembly 4, when the elution is injected, the first driving assembly 4 drives the outer pipe 6 of the grouting branch pipe 3 to extend out of the drill rod 1, and the elution is injected into the secondary salinized soil through the outer pipe 6, and when not in use, the outer pipe 6 can be driven to retract, so that the grouting branch pipe 3 is contracted in the inner cavity of the drill rod 1, so as to avoid being affected when the drill rod 1 is drilled in and taken out, thereby ensuring the grouting efficiency and quality of the elution; a sampling barrel 9 is rotatably arranged on the outer pipe 6, the sampling barrel 9 is transmission-connected with the second driving assembly, a spirally arranged cutting knife 10 is arranged in the sampling barrel 9, and when no sampling is performed, the sampling barrel 9 It is contracted on the outer tube 6 to avoid being affected by the drilling of the outer tube. When sampling is performed, the second driving component drives the sampling tube 9 to rotate. The sampling tube 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 achieve sampling. It is flexible and convenient, so that sampling and grouting can be performed at different times through the same equipment, and it has strong applicability. When the sampling tube 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 tube 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 tube 9 retracts after sampling, the cutting knife 10 cannot cut the soil due to the reverse rotation, and the sampling tube 9 no longer rotates after being reset. The reversal and stoppage cause the spiral cutting knife 10 to seal the mouth of the sampling tube 9, avoiding damage or loss of the sample to affect the accuracy of sampling, and facilitating understanding of the effect of the secondary salinization soil washing liquid treatment from the sample. The present invention realizes the functions of simultaneous eluent injection and post-sampling on the same device through compact structural design and innovative grouting and sampling mechanism, which 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, and provides strong technical support for the restoration of secondary salinized soil eluent.

[0032] In one embodiment of the present application, a conical first drill bit 40 is provided at the bottom end of the drill rod 1 to facilitate the drill rod 1 to drill into the ground.

[0033] In one embodiment of the present application, the outer wall of the drill rod 1 is provided with a plurality of through holes 8 matched with 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 .

[0034] 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.

[0035] In one embodiment of the present application, a plurality of slurry outlet holes 7 that are opened one-way outward are provided on the second drill bit 41 to facilitate the injection of the eluent into the secondary salinized soil for soil remediation.

[0036] 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 .

[0037] Further optimization scheme, the first drive assembly 4 includes a plurality of active screws 11 longitudinally rotatably connected in the sampling cavity, the active screw 11 is transmission-connected with a plurality of transversely arranged driven screws 12, the driven screw 12 is threadedly connected with a drive plate 13, and the drive plate 13 is fixedly connected to one end of the outer tube 6 facing the grouting main pipe 2. The first drive assembly 4 includes the active screw 11, the driven screw 12 and the drive plate 13, the active screw 11 and the driven screw 12 are transmission-arranged, and the drive plate 13 threadedly connected on the driven screw 12 is fixedly connected to the outer tube 6; when it is necessary to control the outer tube 6 to move on the inner tube 5, by rotating the active screw 11, the driven screw 12 is driven to rotate, and then the drive plate 13 is driven to push the outer tube 6 to translate, which 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 the eluent and sampling, and the drill pipe 1 is retracted into the inner cavity of the drill pipe 1 when drilling in and out, to avoid mutual influence.

[0038] In one embodiment of the present application, a driving gear 14 is disposed on the driving screw 11 , and a driven gear 15 meshing with the driving gear 14 is disposed on the driven screw 12 , so as to facilitate transmission between the driving screw 11 and the driven screw 12 .

[0039] In one embodiment of the present application, the driving gear 14 and the driven gear 15 may be selected including but not limited to a matching bevel gear set or a worm gear combination, and those skilled in the art may select according to needs.

[0040] Further optimization scheme, the top of the drill rod 1 is provided with a first driving groove 16, and a driving disc 17 coaxially arranged with the grouting main pipe 2 is rotatably connected in the first driving groove 16, and 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 gear 18 for transmission. A top plate 21 is provided at the top of the drill rod 1, and a first driving groove 16 is provided on the top plate 21, and a driving disc 17 and a driving gear 18 are meshed and transmitted in the first driving groove 16, and the driving gear 18 is connected with the active screw 11 for transmission; when it is necessary to control the telescopic translation of the outer tube 6, the driving disc 17 is rotated, and the power is transmitted to the driving gear 18 through the driving disc 17, thereby driving the active screw 11 to rotate, and the telescopic translation of the outer tube 6 can be controlled by the mechanical structure when the drill rod 1 is drilled into the ground, without the need for additional electricity, which is convenient for use in the field when the power is off, and has high reliability.

[0041] In a further optimized solution, a receiving groove 19 is provided at the top of the driving disk 17, and a control rod 20 is hinged at one end of the receiving groove 19, and the control rod 20 is adapted to and detachably connected to the receiving groove 19. The end of the control rod 20 is hinged to the end of the receiving groove 19, so that the control rod 20 can be stuck in and taken out of the receiving groove 19. When the driving disk 17 needs to be rotated, the control rod 20 can be pulled open to facilitate force application and rotate the driving disk 17; when not in use, the control rod 20 is retracted into the receiving groove 19, so that it will not protrude, thereby avoiding transportation and storage being affected.

[0042] Further optimization scheme, the second driving assembly includes a plurality of clearance grooves 22 opened in the outer tube 6, and a driving block 23 is slidably connected in the clearance grooves 22. 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. The second driving assembly includes the clearance grooves 22 and the driving block 23. The driving block 23 is slidably connected in the clearance grooves 22, and the inclined surface of the top end abuts against the bottom end of the sampling tube 9 for transmission. When the driving block 23 slides in the clearance grooves 22, the thickness of the position 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.

[0043] A further optimized solution is that 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 transmission-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 against the inner wall of the drill pipe 1. The second driving assembly also includes a second driving groove 24, a power block 25 and a transmission rod 30. The power block 25 is connected to the driving block 23 through the transmission rod 30. At the same time, the power block 25 extends out of the second driving groove 24 and abuts against the inner wall of the drill pipe 1 to provide 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 power block 25 not contacting 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. The power block 25 drives the driving block 23 to slide through the transmission rod 30 sliding in the transmission groove 29, and drives the sampling tube 9 to sample, thereby improving the integration and efficiency of the device.

[0044] Further optimization scheme, the outer wall of the outer tube 6 is provided with a sampling groove 26 corresponding to and connected with the give way groove 22, and the sampling tube 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 the guide strip 28 arranged in a spiral shape is slidably connected in the guide groove 27, and the guide strip 28 surrounds and is fixedly connected to the outer wall of the sampling tube 9. The outer wall of the outer tube 6 is provided with a sampling groove 26, and the sampling tube 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 tube 9 is provided with a guide strip 28, and the guide strip 28 slides in the guide groove 27, so that the sampling tube 9 will rotate synchronously when it is forced to move outward, and at the same time, when the sampling tube 9 rotates under the push of the driving block 23, the guide strip 28 slides in the guide groove 27 to maintain stability, so that the sampling tube 9 can rotate synchronously when it extends out of the sampling groove 26, and complete the rotation sampling.

[0045] 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 plurality 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, thereby 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.

[0046] In one embodiment of the present application, a sampling blade 39 is provided at the open position of the sampling tube 9 to facilitate 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, thereby reducing the difficulty of cutting.

[0047] 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 taken out to facilitate the removal of the soil sample in the sampling tube 9.

[0048] Further optimization scheme, the outer tube 6 is provided with a reset groove 31, which is arranged correspondingly and connected with the side wall of the second driving groove 24 facing the driving block 23, and 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 with the side wall of the power block 25. The reset groove 31 and the side wall of the second driving groove 24 facing the driving block 23 are provided with a reset spring 32, which is connected with the power block 25 to keep the power block 25 in a stable state when not subjected to external force; when the power block 25 is pushed by external force, the reset spring 32 is stretched; after the external force disappears, the reset spring 32 resets the power block 25, and then resets the driving block 23, avoiding affecting the retraction of the sampling tube 9, and improving the reliability of the device.

[0049] Further optimization scheme, a plurality of partition plates 33 are arranged in the sampling chamber, and the grouting main pipe 2 and the active screw 11 pass through the partition plates 33 respectively. The plurality of partition plates 33 divide the sampling chamber into a plurality of layers of storage chambers 34, and the connection point between the inner pipe 5 and the grouting main pipe 2 is located in the storage chamber 34. The plurality of partition plates 33 arranged in the sampling chamber divide the sampling chamber into a plurality of layers of storage chambers 34, which is convenient for storing soil eluent samples of different depths separately, and is also convenient for subsequent analysis and comparison of soil remediation states of 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 pipe 5 and the grouting main pipe 2 of the same layer is located in an independent storage chamber 34, and the soil eluent after the external reaction can enter the storage chambers 34 of different layers from the gap between the through hole 8 and the outer pipe 6, so as to realize layered sampling, and the soil treated with the eluent of each layer can be sampled.

[0050] 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.

[0051] 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 .

[0052] In a further optimized solution, a plurality of discharge holes 35 are occasionally opened 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 chamber 34, and a detachable sealing plug 36 is sealed in the discharge hole 35. The side wall of the drill rod 1 is provided with a discharge hole 35, and the discharge hole 35 is located at the bottom end of the storage chamber 34, which can be used to discharge the stored eluent sample; the sealing plug 36 set in the discharge hole 35 is detachable, and when the eluent sample in the storage chamber 34 needs to be discharged, the sealing plug 36 is removed, and the eluent sample is discharged through the discharge hole 35, which is convenient for the discharge of the soil sample after sampling, and improves the practicality and convenience of the device.

[0053] In one embodiment of the present application, the partition plate 33 is arranged in an arc shape, so that the storage chamber 34 can be designed to be inclined from the middle to the surrounding areas, so as to facilitate the complete discharge of the eluent sample and avoid the accumulation of the eluent sample.

[0054] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating 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, and do not indicate or imply 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 a limitation on the present invention.

[0055] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A secondary salinized soil eluate sampling device, characterized in that: It comprises a cylindrical drill rod (1), a sampling cavity of the drill rod (1) is provided with a grouting main pipe (2) for injecting soil washing liquid, the outer wall of the grouting main pipe (2) is connected with a plurality of longitudinally staggered and retractable grouting branches (3), a first driving assembly (4) is provided in the sampling cavity, and the first driving assembly (4) is drivingly connected to 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) drivingly connected to the first driving assembly (4) is slidably connected to the inner pipe (5); the outer pipe (6) is extended out of the drill rod (1) by the drive of the first driving assembly (4) and is used to inject a leaching liquid into the soil; A plurality of open sampling tubes (9) are rotatably arranged on the outer tube (6), the sampling tubes (9) are drivingly connected to a second driving assembly arranged on the outer tube (6), and the second driving assembly abuts against the inner wall of the sampling cavity; The sampling tube (9) is provided with a spirally arranged cutting knife (10).

2. The secondary salinization soil eluate sampling device according to claim 1, characterized in that: The first driving assembly (4) comprises a plurality of active screws (11) which are longitudinally rotatably connected to the sampling cavity, the active screws (11) being drivingly connected to a plurality of laterally arranged driven screws (12), the driven screws (12) being threadedly connected to drive plates (13), the drive plates (13) being fixedly connected to one end of the outer tube (6) which faces the grouting main tube (2).

3. The secondary salinization soil eluate sampling device according to claim 2, characterized in that: A first driving groove (16) is formed at the top end of the drill rod (1), a driving disc (17) coaxially arranged with the grouting main pipe (2) being rotatably connected in the first driving groove (16), the inner ring of the driving disc (17) being meshed with a plurality of driving gears (18), and the active screw rod (11) extends into the first driving groove (16) and meshes with the driving gears (18) for transmission.

4. The secondary salinized soil eluate sampling device according to claim 3, characterized in that: A receiving groove (19) is provided at the top end of the driving disc (17), and a control rod (20) is hingedly connected to one end of the receiving groove (19), and the control rod (20) is adapted to and detachably connected to the receiving groove (19).

5. The secondary salinization soil eluate sampling device according to claim 1, characterized in that: The second driving assembly comprises 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 arranged obliquely away from the side surface of the inner tube (5) and abuts against the closed bottom end of the sampling tube (9) for transmission.

6. The secondary salinized soil eluate sampling device according to claim 5, characterized in that: The second driving assembly comprises a second driving groove (24) formed on the outer tube (6) and arranged corresponding to the clearance groove (22); a power block (25) is slidably arranged in the second driving groove (24); the power block (25) is transmission-connected to the driving block (23) via a transmission rod (30); the power block (25) extends out of the second driving groove (24) and is arranged to abut against the inner wall of the drill rod (1).

7. The secondary salinization soil eluate sampling device according to claim 5, characterized in that: The outer wall of the outer tube (6) is provided with a sampling groove (26) which is arranged corresponding to and connected to the clearance groove (22), and the sampling tube (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 strip (28) is slidably connected in the guide groove (27), and the guide strip (28) surrounds and is fixed to the outer wall of the sampling tube (9).

8. The secondary salinization soil eluate sampling device according to claim 6, characterized in that: The outer tube (6) is provided with a reset groove (31), the reset groove (31) and the second drive groove (24) are arranged correspondingly and connected to the side wall of the drive block (23), a reset spring (32) in a stretched state is fixedly connected in the reset groove (31), and an 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).

9. The secondary salinization soil eluate sampling device according to claim 2, characterized in that: A plurality of partition plates (33) are arranged 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 layers of storage cavities (34). The connection point between the inner tube (5) and the grouting main pipe (2) is located in the storage cavity (34).

10. The secondary salinized soil eluate sampling device according to claim 9, characterized in that: A plurality of discharge holes (35) are occasionally formed through the side wall of the drill rod (1), the discharge holes (35) are located at the bottom end of the side wall of the storage cavity (34), and a detachable sealing plug (36) is sealed in the discharge holes (35).

Images