A method for detecting membrane interfaces in volatile organic polluted land and a direct-push drilling machine

Abstract

This invention proposes a method for detecting membrane interfaces in volatile organic compound (VOC) contaminated land and a direct-push drilling rig, belonging to the technical field of VOC membrane interface detection. The direct-push drilling rig for VOC membrane interface detection includes a vehicle body, a lifting system, and a drilling system. The lifting system is installed at the front end of the vehicle body, and the drilling system is mounted on the lifting system. The lifting system includes a lifting support, which comprises a longitudinal beam for supporting the vertical displacement of the drilling system and a crossbeam vertically arranged on both sides of the bottom of the longitudinal beam for supporting the ground. A sliding seat is installed on the crossbeam, movable between its front and rear ends. A soil-breaking device including a soil-breaking roller is installed between the two sliding seats. A hydraulic cylinder is installed on the longitudinal beam and between the sliding seats to move the soil-breaking device between the front and rear ends of the crossbeam. This invention has the advantage of directly breaking up hardened ground, improving work efficiency.

Description

Technical Field

[0001] This invention relates to the field of membrane interface detection technology for volatile organic polluted land, specifically to a method for membrane interface detection and a direct-push drilling machine for volatile organic polluted land. Background Technology

[0002] As a non-renewable resource, land is facing increasing environmental pressure due to rapid economic development. Polluted sites left behind by industrial relocation are constantly emerging, making the prevention and control of soil and groundwater pollution one of the important tasks of environmental protection. Among these tasks, the investigation and evaluation of polluted sites is the prerequisite and foundation for prevention and control, and is therefore particularly important.

[0003] Traditional site investigation methods, such as using drilling equipment to obtain soil cores and installing monitoring wells to collect samples for laboratory analysis, are time-consuming and only provide point-like information, failing to quickly and effectively determine the extent of contamination on-site. This is especially true for sites contaminated with organic pollutants, where the forms of existence and migration of non-aqueous liquid pollutants in the underground environment differ significantly from those of inorganic pollutants, making it difficult to determine the distribution of non-aqueous liquid pollutants (NAPLs) underground.

[0004] Compared to traditional site investigation methods, in-situ real-time monitoring technology can detect soil and rock properties and pollutant concentrations in real time, rapidly, and continuously, and has broad application prospects in site investigation and other fields. In-situ real-time monitoring technology refers to combining pollutant detection tools or sensors with drilling processes, relying on drilling technology. It allows for in-situ, continuous, and in-situ detection and recording of pollutants in underground soil, enabling rapid acquisition of site strata, total VOC concentration (semi-quantitative), and spatial distribution, thus facilitating rapid identification and screening of site pollution. Among in-situ detection technologies, MIP (Membrane Interface Probe) technology is currently the most widely used and industry-recognized in-situ detection technology for volatile organic pollutants.

[0005] In the initial stage of MIP technology implementation, the route should be familiarized and planned in advance before the equipment arrives on site, and necessary site leveling should be carried out to meet the requirements for equipment entry and installation. If the detection point has hardened ground, the hardened ground should be removed before detection. However, existing drilling rigs have only a single drilling and sampling function, and the removal of hardened ground needs to be carried out separately, which affects the overall efficiency. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention proposes a method for detecting the membrane interface in volatile organic polluted land and a direct-push drilling machine.

[0007] The technical solution of this invention is implemented as follows:

[0008] The first aspect of this invention provides a method for detecting membrane interfaces in volatile organic polluted land, comprising:

[0009] S1. Equipment Arrival and Commissioning: The equipment includes a drilling system, sampling system, detection system, analysis system, and main unit system. The drilling system, sampling system, and main unit system are all integrated into the direct-drive drilling machine. Equipment commissioning includes: MIP startup and commissioning, MIP response testing, and EC testing. Response testing and EC testing should be repeated before and after each point detection.

[0010] S2. Drilling and Sampling: The MIP probe drills steadily at a speed of 0.3m / 15s and remains at the detection depth for a period of time (generally 45s) to ensure sufficient capture of underground contaminants; among which:

[0011] The heating element should heat the soil and / or groundwater it contacts to 100℃~120℃. When the temperature drops due to drilling or encountering an aquifer, the probe dwell time should be appropriately extended until the temperature rises to the set temperature before drilling continues downward. The probe should remain at the final position for a time equivalent to three times the travel time of the pollutant in the carrier gas flow, so that the sampling system can record and match the final location data and depth. During drilling, system parameters including carrier gas flow rate, delivery pipeline pressure, probe temperature, probe advance speed, and probe depth should be recorded.

[0012] After reaching the planned drilling depth and fully responding, first end the curve recording on the computer terminal, then loosen the depth sounder hook before proceeding with the pullback operation. After the pullback is completed, use bentonite to seal the borehole.

[0013] S3. Data processing and analysis to obtain the final detection results.

[0014] A second aspect of the present invention provides a direct-push soil drilling machine for detecting membrane interfaces in volatile organic polluted land, comprising a vehicle body, a lifting system, and a drilling system. The lifting system is installed at the front end of the vehicle body, and the drilling system is mounted on the lifting system. The lifting system includes a lifting support, which includes a longitudinal beam for supporting the vertical displacement of the drilling system and a crossbeam vertically arranged on both sides of the bottom of the longitudinal beam for supporting the ground. A sliding seat is provided on the crossbeam, which can be displaced between its front and rear ends. A soil-crushing device including a soil-crushing roller is installed between the two sliding seats. A hydraulic cylinder is provided on the longitudinal beam and between the sliding seats for dragging the soil-crushing device to move between the front and rear ends of the crossbeam.

[0015] The crossbeam includes a straight section perpendicular to the longitudinal beam and an arc section that curves upward at the front end of the straight section. When the soil-crushing roller is located at the front end of the arc section, the soil-crushing roller is above the ground. When the soil-crushing roller is located in the straight section, the soil-crushing roller is inserted into the soil.

[0016] Furthermore, a limiting seat is provided on the straight section. In the initial state, the limiting seat is located near the front end of the straight section, and a docking area is formed between the limiting seat and the front end of the straight section. When the slide moves backward in the docking area, the limiting seat and the slide lock together to stabilize the soil crushing device when the soil crushing roller crushes the soil. When the slide moves forward in the docking area, the slide separates from the limiting seat.

[0017] Furthermore, the rear side of the slide is provided with a first mating part, the front side of the limiting seat is provided with a second mating part, the limiting seat is provided with a first locking part, and the crossbeam is provided with a second locking part. When the first mating part is inserted into the second mating part, the slide and the limiting seat are locked together and the first locking part and the second locking part are unlocked. When the first locking part and the second locking part are locked together, the first mating part can be pulled out from the second mating part.

[0018] Furthermore, the first docking portion includes a first docking rod fixedly disposed on the rear side of the slide block and a second docking rod slidably disposed on the first docking rod. The second docking portion includes a first rod groove disposed on the front side of the limiting seat for insertion of the first docking rod, a first rod groove I for sliding of the end of the second docking rod inside it, and a second rod groove vertically disposed at the rear end of the first rod groove I for insertion of the end of the second docking rod.

[0019] Furthermore, the surface of the first docking rod is provided with a first rod groove II for sliding the second docking rod. The first rod groove II includes an inclined section at the tail end of the first docking rod and a straight section at the front end of the inclined section. The inner walls on both sides of the first rod groove II are provided with first rod grooves III in a straight state. A slider sleeved on the second docking rod is slidably disposed between the two first rod grooves III. The inner end of the second docking rod contacts the inner wall surface of the first rod groove II, and a rod spring for applying an inward elastic force to the second docking rod is disposed between the slider and the second docking rod.

[0020] Furthermore, the first locking part includes a locking block slidably disposed on the side of the limiting seat and a block spring disposed between the locking block and the limiting seat, and the second locking part includes a locking groove disposed on the crossbeam that is adapted to the locking block, and the block spring is used to provide elastic force for the locking block to insert into the locking groove.

[0021] Furthermore, the inner side of the card block is provided with an unlocking groove that is inclined in the horizontal direction. The front end of the first docking rod is fixedly provided with a third docking rod. When the second docking rod moves to the rear end of the first rod slide groove I, the end of the third docking rod enters the unlocking groove. When the end of the second docking rod moves forward in the straight section, the third docking rod drives the card block to separate from the card groove and be stored in the limiting seat through the unlocking groove.

[0022] Furthermore, the crossbeam includes a base plate and side plates set on both sides of the top of the base plate. A displacement channel is provided between the two side plates. A through groove is opened on the surface of the side plate. The limiting seat is slidably set in the displacement channel. A limiting block is provided on the base plate. When the locking block is inserted into the locking groove, the front side of the limiting seat contacts the rear side of the limiting block, and the height of the limiting block is less than the height of the bottom end of the slide seat located in the displacement channel.

[0023] Furthermore, two pairs of limiting wheels are provided on both sides of the limiting seat, and the two pairs of limiting wheels contact the inner top wall and inner bottom wall of the through groove respectively. Rollers are provided in the slide, and the two ends of the axle of the upper roller roll on the top of the two side plates respectively. The two ends of the axle of the lower roller are located in the two through grooves respectively. The bottom of the upper roller extends into the displacement channel, and the lower roller is located in the displacement channel.

[0024] 1. This invention integrates a soil-breaking device onto a lifting support, enabling the hard surface to be directly broken up and hardened before drilling, which greatly improves work efficiency.

[0025] 2. In the soil breaking device of the present invention, the reciprocating movement of the slide on the crossbeam is used to repeatedly break and harden the surface of the drilling area. At the same time, the locking state of the slide and the limiting seat can improve the stability of the soil breaking device, improve the soil breaking effect and the service life of the device.

[0026] 3. In the soil crushing device of the present invention, the sliding seat and the limiting seat can automatically complete the docking, locking and separation at a predetermined position, which has strong functionality. At the same time, it can be achieved by directly improving the existing lifting support. The improvement is small, the implementation cost is low and the process is simple, making it suitable for push rod applications. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the direct-push drilling machine for detecting membrane interfaces in volatile organic polluted land, as per the present invention.

[0028] Figure 2 This is another perspective view of the direct-push drilling machine for detecting the membrane interface of volatile organic polluted land plots according to the present invention;

[0029] Figure 3 This is a partial schematic diagram of the lifting support of the direct-push drilling machine for detecting the membrane interface of volatile organic polluted land plots according to the present invention.

[0030] Figure 4 This is a partial schematic diagram of the crossbeam of the direct-push soil drill of the present invention;

[0031] Figure 5 This invention relates to a direct-push type soil drill. Figure 4 Enlarged view of point A in the image;

[0032] Figure 6 This invention relates to a direct-push type soil drill. Figure 5 Enlarged view of point B in the image;

[0033] Figure 7 This invention relates to a direct-push type soil drill. Figure 4 Another perspective view;

[0034] Figure 8 This invention relates to a direct-push type soil drill. Figure 7 Enlarged view of point C in the image;

[0035] Figure 9 This is a schematic diagram of the limiting seat of the direct-push type soil drill of the present invention;

[0036] Figure 10 This invention relates to a direct-push type soil drill. Figure 9 Enlarged view of point D in the image;

[0037] Figure 11 This is a partial schematic diagram of the limiting seat of the direct-push soil drill of the present invention;

[0038] Figure 12 This invention relates to a direct-push type soil drill. Figure 11 Another perspective view;

[0039] Figure 13 This is a schematic diagram of the internal structure of the sliding block of the direct-push soil drill of the present invention;

[0040] Figure 14 This invention relates to a direct-push type soil drill. Figure 13 Enlarged view of point E in the image. Detailed Implementation

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] This embodiment provides a method for detecting the membrane interface in volatile organic polluted land, including:

[0043] S1. Equipment Arrival and Commissioning: The equipment includes a drilling system, sampling system, detection system, analysis system, and main unit system. The drilling system, sampling system, and main unit system are all integrated into the direct-drive drilling machine. Equipment commissioning includes: MIP startup and commissioning, MIP response testing, and EC testing. Response testing and EC testing should be repeated before and after each point detection.

[0044] S2. Drilling and Sampling: The MIP probe drills steadily at a speed of 0.3m / 15s and remains at the detection depth for a period of time (generally 45s) to ensure sufficient capture of underground contaminants. The heating element should heat the soil and / or groundwater to 100℃~120℃. If the temperature decreases due to drilling or encountering an aquifer, the probe dwell time should be appropriately extended until the temperature rises to the set temperature before drilling continues. The probe should remain at the final position for a time equivalent to three times the travel time of the contaminants in the carrier gas flow, so that the sampling system can record and match the final location data and depth. During drilling, system parameters including carrier gas flow rate, delivery pipeline pressure, probe temperature, probe advance speed, and probe depth should be recorded. After reaching the planned drilling depth and achieving full response, the curve recording should be stopped on the computer terminal first, and the depth sounder hook should be released before pullback. After pullback, bentonite should be used to seal the borehole.

[0045] S3. Data processing and analysis to obtain the final detection results.

[0046] The main unit system should generally include a slewing unit, a lifting unit, and a transfer unit. The slewing unit primarily provides power to the power head, enabling its rotation; the lifting unit primarily performs the main stroke feeding and lifting function; and the transfer unit primarily enables the movement of the entire equipment, facilitating its operation. The analysis system should generally meet the following technical parameters: maximum output torque ≥ 5023 N·m; maximum thrust ≥ 130 kN; maximum lifting force ≥ 205 kN; energy consumption (fuel) ≤ 8.5 L / h; and mean time between failures (MTBF) ≥ 300 h.

[0047] The drilling system should be able to simultaneously meet the technological requirements of continuous soil penetration under different geological conditions, exploration depths, exploration objectives, and geographical areas. A typical drilling system should include a drilling probe, drilling rod, feed head, and strapdown correction device. The drilling system should generally meet the following technical requirements: inclination angle error ≤ 0.2° / 20m; depth of advance error ≤ ±2mm; speed of advance error ≤ 1mm / s; continuous drilling depth ≥ 20m.

[0048] The sampling system should be able to simultaneously meet the VOCs collection and transportation needs under complex pollution conditions, including varying hydrological conditions, geological conditions, and pollutant phases. A typical sampling system includes a superhydrophobic semi-permeable membrane, a gas chamber, a coupled heating unit, and a nitrogen delivery unit. The sampling system should generally meet the following technical parameters: superhydrophobic semi-permeable membrane water contact angle greater than 90°, temperature resistance 200℃, abrasion rate <1000mg / dm², compressive strength >5.0MPa, flexural strength >1.0MPa, and cycle life >100 cycles; electric heating power ≥500W, heating temperature 100-200℃.

[0049] The detection system infers the formation distribution and vertical distribution of pollutants by analyzing the responses of different detectors. The system mainly includes photoionization detectors, flame ionization detectors, electron capture detectors, halogen-specific detectors, and conductivity meters. Appropriate detectors should be selected and used in combination based on the characteristics of the pollutants in the survey area.

[0050] The analysis system should be able to meet the VOCs detection needs under diverse pollution conditions, including different detection depths, detection purposes, pollutant types, and pollutant concentrations. Detection data should be processed online by the analytical instrument and presented in a timely manner. The analysis system should generally include a predictive model for the distribution coefficients of organic pollutants in semi-permeable membranes and soil media, and a data visualization window. The analysis system should generally meet the following technical parameters: prediction model accuracy >70%; prediction accuracy of the multi-media thermally coupled diffusion model for organic pollutants >70%. Detection data should be processed online by the analytical instrument, and relevant data graphs should be displayed on a monitor.

[0051] Before performing step S1 above, the detection point should be selected first:

[0052] Generally, the horizontal layout of detection points should be carried out in accordance with the relevant requirements of HJ25.1 and HJ25.2, and the number of points should meet the relevant requirements of the "Technical Guidelines for Soil Environmental Investigation and Assessment of Construction Land". For cases with complex pollution history, serious lack of information, or complex hydrogeological conditions, the number of detection points should be increased according to the actual situation.

[0053] The vertical soil detection depth at the detection points can be determined based on the location of the pollution source, the characteristics of pollutant migration, the geological structure, and hydrogeological conditions. The detection depth should exceed the potential depth of the pollutants, such as the burial depth of underground tanks or the maximum burial depth of contaminated soil. The detection depth is affected by geological conditions and generally should not exceed 30m. Before field commencement, a detection point layout plan should be developed, including: the purpose of the investigation, the location and number of detection points, the selection of detectors and monitoring indicators, quality assurance and quality control measures, a field record form, items requiring on-site monitoring, and safety precautions.

[0054] When performing step S1 above:

[0055] Firstly, the route should be familiarized and planned in advance before the equipment arrives on site, and the site should be leveled to meet the requirements for equipment entry and installation. If the ground at the detection point is hardened, the hardening should be removed before detection. According to the site detection requirements, prepare the relevant instruments and components for MIP detection work, and connect the power cord and dedicated cable for instrument data transmission.

[0056] Secondly, the MIP startup and commissioning process involves: opening the gas passages and adjusting parameters such as nitrogen, hydrogen, and air pipeline pressure and flow rate. The data acquisition system and controller box typically require a 10-minute warm-up time. The MIP response test involves: determining the type and concentration of the test solution based on the characteristics of potential contaminants at the site. Immerse the MIP probe in the test solution for 45 seconds, then return the probe to clean water; the test solution cannot be reused.

[0057] Thirdly, the EC test is as follows: After the response test is completed, the EC test should be performed using the EC standard electrode block. The fluctuation range between the test value and the standard electrode block should be within ±10%. If it exceeds 10%, check whether there are faults in the cable, probe, and software. After troubleshooting, retest.

[0058] When performing step S2 above: The MIP probe is recommended to drill steadily at a speed of 0.3 m / 15 s. It should remain at the detection depth for a period of time (generally 45 s) to ensure sufficient capture of underground contaminants. The heating element should heat the soil and / or groundwater in contact with it to 100℃~120℃. If the temperature decreases due to drilling or encountering aquifers, the probe dwell time should be appropriately extended until the temperature rises to the set temperature before drilling downwards again. The carrier gas flow rate should be adjusted according to the contaminant concentration, typically using 25~45 ml / min. If the probe drilling speed is lower than 0.3 m / min, it indicates that the formation is too hard, and drilling should be terminated. The probe should remain at the final position for a time equivalent to three times the travel time of the contaminants in the carrier gas flow, so that the system can record and match the final point data and depth. The probe can only be withdrawn from underground after the point detection is completed. During drilling, system parameters should be recorded in detail, including: carrier gas flow rate, delivery pipeline pressure, probe temperature, probe advance speed, probe depth, etc. After reaching the planned drilling depth and achieving full response, first end the curve recording on the computer terminal, then release the depth sounder hook before proceeding with the pullback operation. After pullback is complete, use bentonite to seal the borehole.

[0059] During step S3 above: MIP can utilize different detectors to obtain multiple data points at different depths. Combined with process data, it can analyze formation characteristics and the three-dimensional distribution of pollutants in soil and groundwater. This data provides foundational data and information for the next detailed investigation, guiding drilling rig placement and exploration scheme optimization. The types of data obtainable by MIP are shown in Table 1.

[0060] Table 1. Statistics of data obtainable from MIP

[0061]

[0062] Compared with conventional survey techniques, MIP technology has significant advantages, mainly in the following aspects:

[0063] (1) MIP technology can record the continuous changes in organic pollutant concentration (semi-quantitative) and soil electrical conductivity with stratum depth in real time. The recorded pollutant data can be processed by software to obtain the vertical or three-dimensional distribution of pollutants, which is an in-situ detection, low-cost and efficient site investigation method;

[0064] (2) MIP technology is highly adaptable and can be adapted to various soil environments. It can measure pollutants in the vadose zone and aquifers, and is particularly effective in detecting non-water-soluble liquid pollutants in the formation. The pollutant distribution data recorded by MIP, combined with soil strata distribution data, can effectively determine the migration pathways of pollutants;

[0065] (3) The MIP technology can obtain the three-dimensional distribution of soil composition and total VOCs concentration (semi-quantitative) in the strata, optimize the design of sampling points and sampling depth, and obtain more representative soil and groundwater samples; it can greatly reduce the cost of subsequent investigation, sampling and laboratory analysis, and reduce expenses and time; it has important guiding role for environmental risk assessment and the design of subsequent remediation plans, such as injecting agents at a certain depth of contaminated strata for remediation.

[0066] (4) Compared with traditional drilling surveys, MIP technology is more environmentally friendly, can avoid the generation of secondary pollution, effectively reduce the spread and transfer of pollutants in drilling surveys, and prevent on-site survey personnel from being directly exposed to pollutant environments.

[0067] Please see Figures 1 to 14 As shown in this embodiment, the direct-push drilling rig for detecting the membrane interface in volatile organic polluted land mainly includes a vehicle body, a lifting system, and a drilling system. Both the lifting system and the drilling system are installed at the front end of the vehicle body, with the drilling system mounted on the lifting system. The lifting system includes a lifting support, and the drilling system is mounted on the lifting support and can move along the length of the lifting support. When the lifting support swings to an upright position perpendicular to the ground, the drilling system can directly drill the drill rod into the soil after activation.

[0068] In this embodiment, the lifting support includes a longitudinal beam 1 for supporting the vertical displacement of the drilling system and a transverse beam 2 vertically arranged on both sides of the bottom of the longitudinal beam 1 for supporting the system on the ground. Specifically, before drilling the drill rod into the soil, the longitudinal beam 1 swings to a position perpendicular to the ground, and the transverse beam 2 contacts the ground and supports the system on the ground to improve the stability and accuracy of the drill rod when it enters the soil.

[0069] Each of the two crossbeams 2 is equipped with a sliding block 3 that can move between its front and rear ends. A soil-breaking device 4 is installed between the two sliding blocks 3. A hydraulic cylinder 5 is installed between the longitudinal beam 1 and the sliding block 3 to move the soil-breaking device 4 between the front and rear ends of the crossbeam 2.

[0070] Specifically, there are two hydraulic cylinders 5, each corresponding to one of the two slides 3. The tail end of the hydraulic cylinder 5 is rotatably mounted on the longitudinal beam 1, and the extended end of the hydraulic cylinder 5 is rotatably connected to the slide 3 on the same side.

[0071] Furthermore, in this embodiment, the soil-crushing device 4 includes a soil-crushing roller 4.1. Both ends of the soil-crushing roller 4.1 are rotatably mounted on opposite sides of two sliding blocks 3. A pulley assembly is provided inside each sliding block 3. One end of the soil-crushing roller 4.1 is fixedly connected to the bottom pulley of the pulley assembly on the same side. A drive shaft is connected between the top pulleys of the two pulley assemblies. Both ends of the drive shaft are rotatably engaged with opposite sides of the two sliding blocks 3. When the drive shaft rotates, it synchronously drives both ends of the soil-crushing roller 4.1 to rotate.

[0072] The surface of the soil-crushing roller 4.1 is fixedly equipped with several uniformly distributed soil-crushing blades. The rotation of the soil-crushing roller 4.1 drives the soil-crushing blades to crush the hardened ground. In this embodiment, a synchronization plate is fixedly connected between the two sliding blocks 3. A soil-crushing motor is fixedly installed on the synchronization plate, and the output shaft of the soil-crushing motor is driven by the drive shaft.

[0073] Furthermore, the crossbeam 2 in this embodiment includes a straight portion 2.1 perpendicular to the longitudinal beam 1 and an arc portion 2.2 that curves upward at the front end of the straight portion 2.1. When the soil-crushing roller 4.1 is located at the front end of the arc portion 2.2, the soil-crushing roller 4.1 is located above the ground. When the soil-crushing roller 4.1 is located in the straight portion 2.1, the soil-crushing roller 4.1 is inserted into the soil.

[0074] Specifically, in the initial state, the hydraulic cylinder 5 is used to position the soil-breaking device 4 at the front end of the arc-shaped portion 2.2, so that when the straight portion 2.1 contacts the ground, the soil-breaking roller 4.1 is positioned above the ground. In this way, in the initial state, the soil-breaking device 4 does not affect the adjustment of the lifting support.

[0075] In actual use, the soil breaking device 4 is first lowered and the support is raised to level it when it is located at the front end of the arc section 2.2, and the straight section 2.1 is brought into contact with the ground through the lifting system.

[0076] Then, the hydraulic cylinder 5 is activated to drag the soil-crushing device 4, causing the soil-crushing roller 4.1 to move from the arc portion 2.2 to the flat portion 2.1. The soil-crushing device 4 is then activated again to make the soil-crushing roller 4.1 rotate. As the hydraulic cylinder 5 drags the soil-crushing device 4 back and forth within the flat portion 2.1, the soil-crushing roller 4.1 can repeatedly crush the surface soil layer within the flat portion 2.1.

[0077] After the soil surface is broken up, the hydraulic cylinder 5 is used to pull the soil breaking device 4 back to the front end of the arc section 2.2, and then the drilling system is started to drill the drill rod into the soil.

[0078] Therefore, the direct-push drilling machine for detecting the membrane interface of volatile organic polluted land in this embodiment integrates a fragmentation device. Without affecting the function of the drilling system, the function of treating the hard surface of the soil is directly integrated into the lifting support. It can directly fragment the hard surface of the soil before inserting the drill rod into the soil for sampling and testing.

[0079] In this embodiment of the invention, a limiting seat 6 is provided on the straight portion 2.1. In its initial state, the limiting seat 6 is located near the front end of the straight portion 2.1, and a mating area 7 is formed between the limiting seat 6 and the front end of the straight portion 2.1.

[0080] When the slide block 3 moves backward within the docking area 7, the limiting seat 6 locks with the slide block 3 to stabilize the soil pulverizing device 4 during soil pulverization by the soil pulverizing roller 4.1. Specifically, when the slide block 3 leaves the arc portion 2.2 and enters the straight portion 2.1, the slide block 3 is located within the docking area 7. When the slide block 3 moves towards the rear end of the straight portion 2.1 within the docking area 7, the slide block 3 first locks with the limiting seat 6. At this time, during the process of the slide block 3 moving backward within the straight portion 2.1, that is, during the process of the soil pulverizing roller 4.1 pulverizing the hard surface layer of the soil below the drill rod, the limiting seat 6 moves synchronously with the slide block 3. Utilizing the sliding engagement between the limiting seat 6 and the crossbeam 2, the limiting seat 6 can assist in stabilizing the slide block 3, improving the stability of the slide block 3, reducing the vibration of the soil pulverizing roller 4.1, improving the soil pulverization effect, and extending the service life of the soil pulverizing device 4.

[0081] When the slide block 3 moves forward within the docking area 7, it separates from the limiting seat 6. Specifically, as the slide block 3 moves from the docking area 7 to the arc portion 2.2, it first separates from the limiting seat 6, which is then restored and held in its initial position. The slide block 3 then continues to move forward on the arc portion 2.2 until it reaches the front end of the arc portion 2.2 and is restored to its initial position.

[0082] The cooperation between the limiting seat 6 and the sliding seat 3 in the above embodiments of the present invention not only improves the stability of soil crushing by utilizing the synchronous displacement process of the locking state of the limiting seat 6 and the sliding seat 3 during the soil crushing process, but also automatically separates the limiting seat 6 and the sliding seat 3 during the process of the soil crushing device 4 returning to the initial position, which can greatly improve applicability.

[0083] Specifically, the rear side of the slide block 3 is provided with a first docking part 8, the front side of the limiting seat 6 is provided with a second docking part 9, the limiting seat 6 is provided with a first locking part 10, and the crossbeam 2 is provided with a second locking part 11.

[0084] When the first docking part 8 is inserted into the second docking part 9, the slide 3 and the limiting seat 6 are locked, and the first locking part 10 and the second locking part 11 are unlocked. It should be noted that in the initial state, when the limiting seat 6 is in its initial position, the first locking part 10 and the second locking part 11 are locked, fixing the limiting seat 6 in its initial position. This ensures that when the slide 3 in the docking area 7 moves towards the limiting seat 6, causing the first docking part 8 to insert into the second docking part 9 and locking the slide 3 and the limiting seat 6, the first locking part 10 actuates and actively separates from the second locking part 11, allowing the first locking part 10 and the second locking part 11 to switch to the unlocked state. At this point, on the one hand, after the limiting seat 6 is unlocked from the crossbeam 2, the limiting seat 6 has the premise to move within the straight section 2.1; on the other hand, the limiting seat 6 is locked to the slide 3, allowing the limiting seat 6 to move synchronously with the slide 3 within the straight section 2.1 under the drive of the slide 3.

[0085] When the first locking part 10 and the second locking part 11 are locked together, the first mating part 8 can be pulled out from the second mating part 9. At this time, it should be noted that when the slide 3 moves upward from the mating area 7 to the arc portion 2.2, the first locking part 10 locks with the second locking part 11 to fix the position of the limiting seat 6, thus providing conditions for the first mating part 8 to be pulled out from the second mating part 9.

[0086] In the above embodiments, through the cooperation of the first docking part 8, the second docking part 9, the first locking part 10 and the second locking part 11, the slide 3 and the limiting seat 6 can be automatically docked and automatically separated in the docking area 7, and the limiting seat 6 can be automatically switched between a fixed state and a free state.

[0087] Specifically, in the embodiments of the present invention:

[0088] The first docking portion 8 includes a first docking rod 8.1 fixedly disposed on the rear side of the slide block 3 and a second docking rod 8.2 slidably disposed on the first docking rod 8.1; the second docking portion 9 includes a first rod groove 9.1 disposed on the front side of the limiting seat 6 for insertion of the first docking rod 8.1, a first rod groove I 9.2 for sliding of the end of the second docking rod 8.2 within it, and a second rod groove 9.3 vertically disposed at the rear end of the first rod groove I 9.2 for insertion of the end of the second docking rod 8.2.

[0089] During the docking process between the first docking portion 8 and the second docking portion 9, the first docking rod 8.1 is inserted into the first rod groove 9.1, while the end of the second docking rod 8.2 enters the first rod sliding groove. As the first docking rod 8.1 is continuously inserted into the first rod groove 9.1, the end of the second docking rod 8.2 moves towards the rear end of the first rod sliding groove. When the end of the second docking rod 8.2 is aligned with the second rod groove 9.3, during the subsequent insertion of the first docking rod 8.1 into the first rod groove 9.1, the first docking rod 8.1 causes the end of the second docking rod 8.2 to be inserted into the second rod groove 9.3.

[0090] Furthermore, the surface of the first connecting rod 8.1 is provided with a first rod groove II 8.3 for sliding the second connecting rod 8.2. The first rod groove II 8.3 includes an inclined section 8.31 located at the tail end of the first connecting rod 8.1 and a straight section 8.32 located at the front end of the inclined section 8.31. At this time, during the process of the first connecting rod 8.1 being inserted into the first rod groove 9.1 and the end of the second connecting rod 8.2 moving within the first rod groove II 9.2, the second connecting rod 8.2 is located within the inclined section 8.31 of the first rod groove II 8.3. During the process of the first connecting rod 8.1 continuing to be inserted into the first rod groove 9.1 after the end of the second connecting rod 8.2 is aligned with the second rod groove 9.3, the inclined section 8.31 of the first rod groove II 8.3 pushes the second connecting rod 8.2 outward, so that the end of the second connecting rod 8.2 is inserted into the second rod groove 9.3, and the second connecting rod 8.2 moves within the first rod groove II 8.3 to the straight section 8.32.

[0091] Specifically, the inner walls on both sides of the first rod groove II 8.3 are provided with first rod groove III 8.4 in a straight state. A slider 8.5 is slidably disposed between the two first rod grooves III 8.4 and sleeved on the second connecting rod 8.2. The inner end of the second connecting rod 8.2 contacts the inner wall surface of the first rod groove II 8.3, and a rod spring 8.6 is provided between the slider 8.5 and the second connecting rod 8.2 for applying an inward elastic force to the second connecting rod 8.2.

[0092] At this time, the main function of the rod spring 8.6 is to provide elastic force to the second docking rod 8.2 in the initial state, so that the inner end of the second docking rod 8.2 abuts against the inner wall of the first rod slide groove II 8.3, so as to prevent the second docking rod 8.2 from moving arbitrarily, improve its stability, and ensure the effective docking of the limit seat 6 and the slide seat 3.

[0093] During the docking process between the slide block 3 and the limiting seat 6, the slide block 3 moves to one side of the limiting seat 6 to achieve the docking process. Then, during the docking process, starting from the end of the second docking rod 8.2 entering the second rod groove 9.3, the first docking rod 8.1 achieves effective connection with the limiting seat 6 through the second docking rod 8.2.

[0094] Specifically, the first locking part 10 includes a locking block 10.1 slidably disposed on the side of the limiting seat 6 and a block spring 10.2 disposed between the locking block 10.1 and the limiting seat 6. The second locking part 11 includes a locking groove on the crossbeam 2 that is adapted to the locking block 10.1, and the block spring 10.2 provides elastic force for the locking block 10.1 to insert into the locking groove. In the initial state, the locking block 10.1 is held inserted into the locking groove by the action of the block spring 10.2, and the position of the limiting seat 6 is fixed by the locking block 10.1 and the locking groove.

[0095] Furthermore, the inner side of the locking block 10.1 is provided with an unlocking groove 10.3 that is inclined in the horizontal direction. A third connecting rod 12 is fixedly provided at the front end of the first connecting rod 8.1. When the second connecting rod 8.2 moves to the rear end of the first rod slide groove I 9.2, the end of the third connecting rod 12 enters the unlocking groove 10.3. As the end of the second connecting rod 8.2 moves forward in the straight section 8.32, the third connecting rod 12 drives the locking block 10.1 to separate from the slot and be stored in the limiting seat 6 through the unlocking groove 10.3. After the locking block 10.1 separates from the slot and is stored in the limiting seat 6, the limiting seat 6 can not only move on the crossbeam 2, but the locking block 10.1 is also blocked by the crossbeam 2 and cannot extend. At this time, the locking block 10.1, in conjunction with the unlocking groove 10.3, has a locking effect on the third docking rod 12. The third docking rod 12 prevents the first docking rod 8.1 from being pulled out of the first rod groove 9.1, thereby locking the limiting seat 6 and the slide 3.

[0096] The crossbeam 2 includes a base plate 2.3 and side plates 2.4 disposed on both sides of the top of the base plate 2.3. A displacement channel 2.5 is provided between the two side plates 2.4. A through groove 2.6 is opened on the surface of the side plate 2.4. The limiting seat 6 is slidably disposed in the displacement channel 2.5. A limiting block 13 is provided on the base plate 2.3. When the locking block 10.1 is inserted into the locking groove, the front side of the limiting seat 6 contacts the rear side of the limiting block 13, and the height of the limiting block 13 is less than the bottom height of the slide 3 located in the displacement channel 2.5.

[0097] Specifically, the displacement channel 2.5 is formed by two parallel and spaced side plates 2.4. When the front side of the limiting seat 6 contacts the rear side of the limiting block 13, as the slide 3 continues to move towards the arc portion 2.2, the limiting seat 6 is blocked by the limiting block 13 and cannot continue to move. The third connecting rod 12 causes the locking block 10.1 to extend from the limiting seat 6 and insert into the locking slot through the unlocking groove 10.3, thereby fixing the position of the limiting seat 6 and unlocking and separating the limiting seat 6 from the slide 3.

[0098] The limiting seat 6 has two pairs of limiting wheels 6.1 arranged vertically on both sides, and the two pairs of limiting wheels 6.1 contact the inner fixed wall and inner bottom wall of the through groove 2.6. The slide 3 has rollers 6.2 arranged vertically. The axle 6.3 of the upper roller 6.2 rolls on the top of the two side plates 2.4 at both ends, while the axle 6.3 of the lower roller 6.2 is located in the two through grooves 2.6 at both ends. The bottom of the upper roller 6.2 extends into the displacement channel 2.5, and the lower roller 6.2 is located in the displacement channel 2.5. The limiting seat 6 uses the limiting wheels 6.1 to grip the crossbeam 2 in the height direction to achieve a certain degree of stability. At the same time, the two rollers 6.2 are arranged vertically to make the slide 3 more suitable for displacement on the arc part 2.2.

[0099] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A direct-push drilling rig for detecting membrane interfaces in volatile organic polluted land, comprising a vehicle body, a lifting system, and a drilling system, wherein the lifting system is installed at the front end of the vehicle body, the drilling system is mounted on the lifting system, and the lifting system includes a lifting support frame, characterized in that, The lifting support includes a longitudinal beam (1) for bearing the vertical displacement of the drilling system and a crossbeam (2) vertically arranged on both sides of the bottom of the longitudinal beam (1) for supporting the ground. The crossbeam (2) is provided with a sliding seat (3) that can move between its front and rear ends. A soil-breaking device (4) containing a soil-breaking roller (4.1) is installed between the two sliding seats (3). A hydraulic cylinder (5) is provided between the longitudinal beam (1) and the sliding seat (3) for dragging the soil-breaking device (4) to move between the front and rear ends of the crossbeam (2). The crossbeam (2) includes a straight portion (2.1) perpendicular to the longitudinal beam (1) and an arc portion (2.2) curved upward at the front end of the straight portion (2.1). When the soil-crushing roller (4.1) is located at the front end of the arc portion (2.2), the soil-crushing roller (4.1) is located above the ground. When the soil-crushing roller (4.1) is located in the straight portion (2.1), the soil-crushing roller (4.1) is inserted into the soil. A limiting seat (6) is provided on the straight part (2.1). In the initial state, the limiting seat (6) is located near the front end of the straight part (2.1), and a docking area (7) is formed between the limiting seat (6) and the front end of the straight part (2.1). When the slide (3) moves backward in the docking area (7), the limiting seat (6) and the slide (3) are locked together to stabilize the soil crushing device (4) when the soil crushing roller (4.1) crushes the soil. When the slide (3) moves forward in the docking area (7), the slide (3) and the limiting seat (6) are separated.

2. The direct-push drilling machine for detecting membrane interfaces in volatile organic polluted land according to claim 1, characterized in that, The rear side of the slide (3) is provided with a first docking part (8), the front side of the limiting seat (6) is provided with a second docking part (9), the limiting seat (6) is provided with a first locking part (10), and the crossbeam (2) is provided with a second locking part (11). When the first docking part (8) is inserted into the second docking part (9), the slide (3) and the limiting seat (6) are locked together and the first locking part (10) and the second locking part (11) are unlocked. When the first locking part (10) and the second locking part (11) are locked together, the first docking part (8) can be pulled out from the second docking part (9).

3. A direct-push drilling machine for detecting membrane interfaces in volatile organic polluted land according to claim 2, characterized in that, The first docking part (8) includes a first docking rod (8.1) fixedly disposed on the rear side of the slide (3) and a second docking rod (8.2) slidably disposed on the first docking rod (8.1). The second docking part (9) includes a first rod groove (9.1) disposed on the front side of the limiting seat (6) for the insertion of the first docking rod (8.1), a first rod groove I (9.2) for the end of the second docking rod (8.2) to slide inside it, and a second rod groove (9.3) vertically disposed at the rear end of the first rod groove I (9.2) for the insertion of the end of the second docking rod (8.2).

4. A direct-push drilling machine for detecting membrane interfaces in volatile organic polluted land according to claim 3, characterized in that, The surface of the first docking rod (8.1) is provided with a first rod groove II (8.3) for sliding the second docking rod (8.2). The first rod groove II (8.3) includes an inclined section (8.31) located at the tail end of the first docking rod (8.1) and a straight section (8.32) located at the front end of the inclined section (8.31). The inner walls on both sides of the first rod groove II (8.3) are provided with first rod groove III (8.4) in a straight state. A slider (8.5) sleeved on the second docking rod (8.2) is slidably arranged between the two first rod grooves III (8.4). The inner end of the second docking rod (8.2) contacts the inner wall surface of the first rod groove II (8.3), and a rod spring (8.6) for applying an inward elastic force to the second docking rod (8.2) is provided between the slider (8.5) and the second docking rod (8.2).

5. A direct-push drilling machine for detecting membrane interfaces in volatile organic polluted land according to claim 3, characterized in that, The first locking part (10) includes a locking block (10.1) slidably disposed on the side of the limiting seat (6) and a block spring (10.2) disposed between the locking block (10.1) and the limiting seat (6). The second locking part (11) includes a slot on the crossbeam (2) adapted to the locking block (10.1) and the block spring (10.2) is used to provide the locking block (10.1) with an elastic force for insertion into the slot.

6. A direct-push drilling machine for detecting membrane interfaces in volatile organic polluted land according to claim 5, characterized in that, The inner side of the card block (10.1) is provided with an unlocking groove (10.3) that is inclined in the horizontal direction. The front end of the first docking rod (8.1) is fixedly provided with a third docking rod (12). When the second docking rod (8.2) moves to the rear end of the first rod slide groove I (9.2), the end of the third docking rod (12) enters the unlocking groove (10.3). When the end of the second docking rod (8.2) moves forward in the straight section (8.32), the third docking rod (12) drives the card block (10.1) to separate from the card groove and be stored in the limiting seat (6) through the unlocking groove (10.3).

7. A direct-push drilling machine for detecting membrane interfaces in volatile organic polluted land according to claim 5, characterized in that, The crossbeam (2) includes a base plate (2.3) and side plates (2.4) on both sides of the top of the base plate (2.3). A displacement channel (2.5) is provided between the two side plates (2.4). A through groove (2.6) is opened on the surface of the side plate (2.4). The limiting seat (6) is slidably disposed in the displacement channel (2.5). A limiting block (13) is provided on the base plate (2.3). When the locking block (10.1) is inserted into the locking groove, the front side of the limiting seat (6) contacts the rear side of the limiting block (13), and the height of the limiting block (13) is less than the bottom height of the slide (3) located in the displacement channel (2.5).

8. A direct-push drilling machine for detecting membrane interfaces in volatile organic polluted land according to claim 7, characterized in that, The limiting seat (6) is provided with two pairs of limiting wheels (6.1) arranged vertically on both sides, and the two pairs of limiting wheels (6.1) contact the inner top wall and inner bottom wall of the through groove (2.6) respectively. The slide (3) is provided with rollers (6.2) arranged vertically. The axle (6.3) of the upper roller (6.2) rolls on the top of the two side plates (2.4) respectively. The axle (6.3) of the lower roller (6.2) is located in the two through grooves (2.6) respectively. The bottom of the upper roller (6.2) extends into the displacement channel (2.5), and the lower roller (6.2) is located in the displacement channel (2.5).

9. A method for detecting the membrane interface in volatile organic polluted land, comprising using a direct-push drilling rig for detecting the membrane interface in volatile organic polluted land as described in any one of claims 1 to 8, characterized in that, include: S1. Equipment Arrival and Commissioning: The equipment includes a drilling system, sampling system, detection system, analysis system, and main unit system. The drilling system, sampling system, and main unit system are all integrated into the direct-drive soil drill. Equipment commissioning includes: MIP startup and commissioning, MIP response testing, and EC testing. Response testing and EC testing should be repeated before and after each point detection. S2. Drilling and Sampling: The MIP probe drills steadily at a rate of 0.3m / 15s and remains at the detection depth for a period of time to ensure sufficient capture of underground contaminants; among which: The heating element should heat the soil and / or groundwater it comes into contact with to 100℃~120℃. When the temperature drops due to drilling or encountering aquifers, the probe dwell time should be appropriately extended. Drilling should continue until the temperature rises to the set temperature. The probe should remain at the final position for three times the travel time of the pollutant in the carrier gas flow so that the sampling system can record and match the final location data and depth. During the drilling process, system parameters including carrier gas flow rate, delivery pipeline pressure, probe temperature, probe advance speed, and probe depth should be recorded. After reaching the planned drilling depth and fully responding, first end the curve recording on the computer terminal, then loosen the depth sounder hook before proceeding with the pullback operation. After the pullback is completed, use bentonite to seal the borehole. S3. Data processing and analysis to obtain the final detection results.

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