Treatment method and device for surveying DNAPL water pollution range through wireless electric field

Abstract

The invention relates to the technical field of sewage treatment, in particular to a treatment method and device for surveying a DNAPL water pollution range through a wireless electric field, and the device comprises a mobile platform, a geological radar, a knob, a fixing assembly, a fixing plate, an adjusting assembly and a lower pressing plate; a driving cavity is formed in the moving platform, a knob is installed on the moving platform, a fixing assembly is arranged below the knob and located in the driving cavity, a fixing plate is installed in the driving cavity, and after the geological radar is placed on the moving platform, the knob drives the fixing plate to horizontally slide through the fixing assembly; a sliding cavity is formed in the fixing plate, gear teeth are arranged at the top end of the sliding cavity, an adjusting assembly is installed in the sliding cavity, a lower pressing plate is arranged above the adjusting assembly, and when the fixing plate horizontally slides, the fixing assembly drives the lower pressing plate to vertically slide through the adjusting assembly. The situation that the geological radar shakes in the moving process, and consequently the measurement data quality is reduced is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a method and a device for treating DNAPL water pollution range by radio field survey. Background Art

[0002] Heavy non-aqueous phase liquid, also known as DNAPL, is a derivative of petroleum. DNAPL will penetrate. When DNAPL penetrates into groundwater, it will cause serious pollution. DNAPL-contaminated areas are widely distributed. Once DNAPL enters groundwater, it will often have serious impacts on the surrounding environment and ecosystem, and even endanger the health of nearby residents.

[0003] The geological radar method is often used to detect the scope of DNAPL pollution in historical petroleum industrial sites and abandoned oil fields. The geological radar is installed on a mobile platform, and then the mobile platform drives the geological radar to move along a fixed path within the designated range. During the movement, the geological radar will continuously emit and receive electromagnetic field waves through the antenna on it. The staff will judge the contaminated area based on the frequency, signal amplitude and waveform of the reflected wave of the electromagnetic field received by the geological radar, and then define the scope of DNAPL pollution.

[0004] During the detection, the geological radar is connected to the mobile platform with bolts, and the installation process is rather cumbersome. At the same time, during the movement of the mobile platform, due to the insufficient flatness of the ground, the mobile platform will be bumpy. When the mobile platform transfers the external force to the geological radar, the geological radar and the mobile platform will shake relative to each other, causing the geological radar to fluctuate in receiving electromagnetic field waves, resulting in reduced quality of collected data.

[0005] To this end, the prior art has proposed a geological radar, which uses a beam deflector to deflect the radar waves emitted by the transmitting antenna, thereby emitting the radar waves to a larger range, thereby increasing the detection range of the geological radar. At the same time, the geological radar uses a beam converger to converge the radar waves reflected back from the underground, thereby more accurately knowing the underground situation. However, the problem of geological radar jitter caused by insufficient ground flatness has not yet been solved.

[0006] In view of this, we propose a method and device for surveying the scope of DNAPL water pollution by radio field. Summary of the invention

[0007] The purpose of the present invention is to provide a method and device for treating DNAPL water pollution range by radio field survey, so as to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] The method and device for treating DNAPL water pollution range by radio field survey include the following steps:

[0010] Step 1: Conduct site survey on the contaminated land to be tested, and use the measured site data for network deployment and subsequent three-dimensional high-density electrical inversion;

[0011] Site data mainly include site boundaries and surface topography of the plot, etc., to determine the initial basic data;

[0012] Step 2: Use a three-dimensional high-density electrical instrument to collect data based on the deployed measurement network;

[0013] The data collection content includes: 3D high-density original profile data + profile starting point, end point and terrain data. The measurement network density is line distance * point distance: 2m*2m;

[0014] Step 3: At the same time, collect relevant historical information about the contaminated land for correction and calibration of the three-dimensional geophysical model;

[0015] Historical data include: historical structures, production history, etc. The accuracy of detection can be further improved by combining historical data with existing data;

[0016] Step 4: Combine the acquired data with the collected related information to perform data editing and processing and three-dimensional inversion;

[0017] 3D inversion refers to the inversion processing of 3D high-density original profile data + profile start point, end point and terrain data through professional inversion software;

[0018] Step 5: Conduct a comprehensive backwash study on the 3D inversion results, and conduct a comprehensive study and analysis based on the resistivity and water content parameters of different stratum lithology and aquifer structures;

[0019] After comprehensive analysis of the inversion results, we can find out the obvious electrical anomaly areas that may be caused by the infiltration of DNAPL and the contamination of groundwater. This area usually shows obvious local resistance anomalies, mostly in the form of clusters or strips, and generally extends underground to a certain extent.

[0020] Step 6: After the above anomaly analysis, the suspected contaminated area is delineated and the reliability and authenticity of the anomaly is verified through geological radar survey;

[0021] Geological radar uses the difference in electromagnetic field wave propagation speed of underground media as its physical property basis. It observes and studies the distribution law of artificially established underground stable electromagnetic fields, determines the depth and range of abnormal bodies through the distribution of electromagnetic fields, and then compares them with the results of three-dimensional inversion.

[0022] Step 7: Conduct comprehensive analysis and comparison between the 3D inversion structure and the geological radar detection results to confirm the abnormal target area;

[0023] After the abnormal target area is determined based on comprehensive analysis and comparison, the abnormal target area is processed;

[0024] Step 8: Conduct DNAPL water pollution control in the confirmed areas;

[0025] Intercept sewage in the confirmed areas to prevent further spread of DNAPL pollution, and at the same time, carry out sewage treatment.

[0026] Furthermore, in step 2, the data acquisition includes three-dimensional high-density electrical data acquisition and electrical profile coordinate information acquisition;

[0027] Data collection mainly involves the collection of three-dimensional high-density electrical data. While collecting three-dimensional high-density electrical profile data, it is necessary to assist in the collection of electrical profile coordinate information, such as the profile starting point, end point and intermediate coordinate information between the two points, so as to determine the specific location of the profile in the exploration area and the height difference between the starting point and end point of the profile.

[0028] Furthermore, in step 2, the three-dimensional high-density electrical data acquisition includes the following steps:

[0029] Step 2.1: Insert two electrode rods as current electrodes in the test area, and pass direct current into the current electrodes to establish an artificial electric field;

[0030] After allocating the positive and negative poles of the current electrode, current is passed into the current electrode, using the geology as a resistance material to establish an artificial electric field;

[0031] Step 2.2: inserting two electrode rods as potential levels into the artificial electric field, and passing direct current;

[0032] Insert a motor rod between the current electrodes as a potential level, and measure the potential difference between the two potential levels after passing direct current;

[0033] Step 2.3: measuring the potential difference between the electrodes through the potential level, and using Ohm's law to calculate the resistivity of the underground material between the potential levels;

[0034] According to Ohm's law: R = U / I, U is the voltage intensity of the artificially established electric field; I is the potential difference between the two current electrodes; Substitute the two into the formula to find the resistance between the two current electrodes;

[0035] Step 2.4: measuring the resistivity of different formations by changing the distance between the potential level and the current electrode in the artificial electric field;

[0036] By adjusting the position of the current electrode, the geological resistivity of different areas within the field source is measured, and then the resistivity distribution of the entire field source is measured.

[0037] Furthermore, in step 6, the geological radar survey verification includes the following steps:

[0038] Step 6.1: Install the geological radar on the mobile platform and control the mobile platform to move evenly in the site;

[0039] The geological radar sends electromagnetic field waves underground during its movement. Based on the difference in the propagation speed of electromagnetic field waves in the underground medium, the distribution law of artificially established underground stable electromagnetic fields is observed and studied to determine the scope of DNAPL pollution.

[0040] Step 6.2: The time difference ΔT between the ground reflected wave and the underground reflected wave is measured by emitting electromagnetic field waves through the geological radar. According to the formula: H = V*ΔT / 2, the underground abnormal burial depth H is measured;

[0041] H is the formation thickness, which is used to compare with the 3D inversion results;

[0042] Step 6.2.1: According to the formula: The propagation speed of electromagnetic field waves in underground media was measured;

[0043] In the formula, C is the propagation speed of electromagnetic field waves in the atmosphere, which is about 3×108m / s; ε is the relative dielectric constant, which depends on the dielectric constant of the materials constituting each layer of the underground.

[0044] Step 6.3: At the same time, according to the emission and reception of electromagnetic field waves during the movement of the geological radar, a radar profile consisting of reflection records is obtained;

[0045] The distribution of the event axis obtained from the radar profile has an intuitive corresponding relationship with the burial depth and shape of different underground dielectric targets.

[0046] A device comprises a mobile platform, a geological radar, a knob, a fixing assembly, a fixing plate, an adjusting assembly and a lower pressing plate;

[0047] A driving cavity is provided on the mobile platform, a knob is installed on the mobile platform, a fixing component is provided under the knob, the fixing component is located in the driving cavity, a fixing plate is installed in the driving cavity, after the geological radar is placed on the mobile platform, the knob drives the fixing plate to slide horizontally through the fixing component, the fixing plate slides horizontally close to the geological radar, thereby limiting the displacement of the geological radar in the horizontal direction, when the mobile platform encounters a protrusion or a pit, the geological radar remains stable in the horizontal direction without shaking;

[0048] A sliding cavity is provided on the fixed plate, gear teeth are provided on the top of the sliding cavity, an adjusting component is installed in the sliding cavity, a lower pressure plate is provided above the adjusting component, and gear teeth cooperating with the adjusting component are provided on the lower pressure plate. When the fixed plate slides horizontally, the fixed component drives the lower pressure plate to slide vertically through the adjusting component. The vertical sliding of the lower pressure plate limits the displacement of the geological radar in the vertical direction to avoid up and down fluctuations of the geological radar when the ground is uneven.

[0049] Preferably, the fixed assembly includes a driving shaft, a driving wheel, a reciprocating rack, a driving wheel, a driven wheel and a transmission rod; the driving shaft is located in a driving cavity, one end of the driving shaft is fixedly connected to a knob, and the other end of the driving shaft is fixedly connected to the driving wheel; a reciprocating rack is slidably installed on one end of the driving wheel; when the geological radar is placed on a mobile platform, the staff rotates the knob, and the knob drives the driving wheel to rotate through the driving shaft, and the driving wheel then drives the reciprocating rack meshing with it to slide, and the reciprocating rack meshes with the driving wheel; the reciprocating rack plays a role in transmitting motion, transmitting the rotation of the driving wheel to the driving wheel, and the driving wheel is divided into a first step and a second step, the first step is meshed with the reciprocating rack, the second step is meshed with the driven wheel, the first step is meshed with the reciprocating rack, and then Under the action, the driving wheel is driven to rotate as a whole, and the driving wheel then transmits the motion to the driven wheel through the second step; there are four driven wheels, and the driven wheels are arranged in a ring array on the outside of the driving wheel. The driven wheel is divided into a transmission section and a driving section, and the transmission section is meshed with the second step, and the driving section is meshed with the transmission rod. The transmission section drives the driven wheel as a whole to rotate by meshing with the second step; a strip groove and a through hole are provided on the transmission rod, and a gear tooth is provided on one side of the strip groove to mesh with the driving section. A fixing plate is fixedly installed on the transmission rod, and a cavity connected with the sliding cavity is provided on the transmission rod. When the driven wheel rotates, it meshes with the gear tooth in the strip groove, and then drives the transmission rod to slide horizontally through the gear tooth. The transmission rod slides horizontally along the direction of the geological radar to fix the geological radar and keep the geological radar stable.

[0050] Preferably, the adjustment assembly includes a sliding rack, a rotating wheel, a transmission wheel, a rotating shaft, a tension spring, a slider, a deflection rack and a connecting rod mechanism; the sliding rack is slidably installed in the cavity, and one end is meshed with the driving section of the driven wheel; the other end of the sliding rack is meshed with the rotating wheel, and the pitch of the gear teeth at both ends of the sliding rack is different; a transmission wheel is provided on one side of the rotating wheel, and when the driven wheel rotates, its driving section meshes with the sliding rack to drive the sliding rack to slide, and the sliding rack meshes with the rotating wheel during the sliding process, and the rotating wheel drives the transmission wheel to The transmission wheel is rotatably installed in the cavity, and the transmission wheel is slidably installed on the rotating shaft. A tension spring is arranged between the transmission wheel and the rotating shaft, and the tension spring is used to realize the reset of the transmission wheel. The rotating shaft passes through the cavity and extends into the sliding cavity, and a thread is provided on the rotating shaft. The slider is nested on the rotating shaft, and a thread matching with the rotating shaft is provided on the slider. The transmission wheel drives the rotating shaft to rotate synchronously during the rotation process. During the rotation process of the rotating shaft, the thread squeezes the screw groove on the slider, thereby driving the slider to slide back and forth on the rotating shaft.

[0051] A lower pressure plate is rotatably mounted on the slider, and a deflection rack is provided above the slider; the deflection rack is fixedly mounted on the top of the sliding cavity, and the deflection rack cooperates with the gear teeth on the lower pressure plate; the slider drives the lower pressure plate to move synchronously when sliding downward, and the gear teeth on the lower pressure plate mesh with the deflection rack during the downward sliding process, and the lower pressure plate rotates 90° from a vertical state to a horizontal state, limiting the degrees of freedom of the geological radar in the up and down directions, thereby ensuring the stability of the installation of the geological radar, and preventing the geological radar from shaking under the action of external force, which affects the survey effect. A moving cavity is provided on the lower pressure plate, and a connecting rod mechanism is provided between the lower pressure plate and the slider, which is used to realize the disengagement of the rotating wheel and the transmission wheel. When the lower pressure plate has completed the restriction of the up and down degrees of freedom of the geological radar, and the fixed plate has not yet completed the restriction of the degrees of freedom around the geological radar, at this time, the transmission wheel and the rotating wheel are disengaged, and the slider is no longer moving, so that the lower pressure plate is no longer moving, and the geological radar is restricted, which prevents the lower pressure plate from continuing to move downward and causing damage to the geological radar.

[0052] Preferably, the connecting rod mechanism includes a driving rod, a pulling rod, a hinged rod, an active rod, a driven rod and a push rod; the driving rod is slidably installed in the moving cavity, the driving rod is provided with an oblique groove, the pulling rod and the driving rod are arranged vertically, the pulling rod is provided with an oblique groove cooperating with the driving rod, the pulling rod is fixedly connected to the hinged rod, the two ends of the hinged rod are respectively connected with the active rod, the active rod and the driven rod are rotatably connected, the driven rod is slidably installed on the sliding block, and a push rod is provided under the driven rod; the push rod is located above the transmission wheel, and when the lower pressure plate fixes the geological radar, the lower pressure plate gradually contacts the geological radar, the driving rod on the lower pressure plate moves under the action of the geological radar, and pushes the pulling rod through the oblique groove, and the pulling rod then pushes the hinged rod to slide horizontally, the hinged rod drives the active rod to slide horizontally, the active rod pushes the driven rod to move vertically downward, the driven rod drives the push rod to move vertically downward, the push rod pushes the transmission wheel and the rotating wheel to disengage the teeth, and the lower pressure plate no longer moves.

[0053] Preferably, the teeth of the rotating wheel and the transmission wheel are both provided with inclined surfaces, which are used to reduce the friction between the rotating wheel and the transmission wheel, thereby reducing the wear of the rotating wheel and the transmission wheel during tooth disengagement and engagement, thereby increasing the service life of the rotating wheel and the transmission wheel, and at the same time, guiding the engagement of the rotating wheel and the transmission wheel.

[0054] Preferably, the rotating shaft is provided with a limiting groove in an annular array, and the limiting block in an annular array on the inner wall of the transmission wheel cooperates with the limiting groove, and a tension spring is connected between the limiting block and the limiting groove. When the transmission wheel rotates, the transmission wheel squeezes the limiting groove through the limiting block and drives the rotating shaft to rotate. When the transmission wheel and the rotating wheel are disengaged and move downward, the transmission wheel moves vertically downward along the limiting groove, and the transmission wheel pulls the tension spring to put it in a stretched state. (The height of the limiting block is the same as the height of the transmission wheel, and the height of the limiting groove is at least twice the height of the limiting block).

[0055] Compared with the prior art, the present invention has the following beneficial effects:

[0056] 1. A method and device for treating DNAPL water pollution range by radio field survey. The present invention fixes the geological radar through a fixing component and an adjusting component, so that the geological radar and the mobile platform form a whole, thereby preventing the geological radar from shaking relative to the mobile platform during movement.

[0057] 2. A method and device for controlling the scope of DNAPL water pollution by radio field survey. The present invention can fix geological radars of different specifications through fixing components and adjusting components, realizes adaptive fixation, improves applicability, and adapts to the detection of different plots of land.

[0058] 3. A method and device for treating DNAPL water pollution range by radio field survey. The present invention combines three-dimensional inversion with geological radar detection method to enable mutual comparison of detection results, improve the accuracy of detection, and ensure the accurate delineation of DNAPL pollution range. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 is a flow chart of the method of the present invention;

[0060] Figure 2 An example diagram of the three-dimensional inversion of the present invention;

[0061] Figure 3 This is a schematic diagram of the geological radar of the present invention before installation;

[0062] Figure 4 It is a schematic diagram of the installation of the geological radar of the present invention;

[0063] Figure 5 It is the overall structure diagram of the fixing assembly and the adjusting assembly of the present invention;

[0064] Figure 6 It is a top view of the overall structure of the fixing assembly and the adjusting assembly of the present invention;

[0065] Figure 7 It is an overall schematic diagram of the fixing assembly of the present invention;

[0066] Figure 8 It is an overall schematic diagram of the adjustment component of the present invention;

[0067] Fig. 9 It is a step-sectional schematic diagram of the adjustment assembly of the present invention;

[0068] Fig.10 A half-section view of the adjustment assembly of the present invention;

[0069] Fig.11 For the present invention Fig.10 A local enlarged view of point A;

[0070] Fig.12 For the present invention Fig.10 A local enlarged view of point B;

[0071] Fig.13 It is a schematic diagram of the connecting rod mechanism of the present invention.

[0072] In the figure:

[0073] 1. Mobile platform; 11. Driving chamber;

[0074] 2. Geological radar;

[0075] 3. Knob;

[0076] 4. Fixed assembly; 41. Driving shaft; 42. Driving wheel; 43. Reciprocating rack; 44. Driving wheel; 441. First step; 442. Second step; 45. Driven wheel; 451. Transmission section; 452. Driving section; 46. Transmission rod; 461. Strip groove; 462. Cavity;

[0077] 5. Fixed plate; 51. Sliding cavity;

[0078] 6. Adjustment assembly; 61. Sliding rack; 62. Intermediate wheel; 63. Transmission wheel; 631. Limit block; 64. Rotating shaft; 641. Limiting groove; 65. Tension spring; 66. Sliding block; 67. Deflection rack; 68. Link mechanism; 681. Driving rod; 682. Pull rod; 683. Articulated rod; 684. Active rod; 685. Driven rod; 686. Push rod;

[0079] 7. Lower pressure plate; 71. Moving cavity. DETAILED DESCRIPTION

[0080] 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.

[0081] A technical solution provided by the present invention:

[0082] like Figure 1 to Figure 2 As shown, the method and device for treating DNAPL water pollution range by radio field survey include the following steps:

[0083] Step 1: Conduct site survey on the contaminated land to be tested, and use the measured site data for network deployment and subsequent three-dimensional high-density electrical inversion;

[0084] Site data mainly include site boundaries and surface topography of the plot, etc., to determine the initial basic data;

[0085] Step 2: Use a three-dimensional high-density electrical instrument to collect data based on the deployed measurement network;

[0086] The data collection content includes: 3D high-density original profile data + profile starting point, end point and terrain data. The measurement network density is line distance * point distance: 2m*2m;

[0087] In step 2, the data acquisition includes three-dimensional high-density electrical data acquisition and electrical profile coordinate information acquisition;

[0088] Data collection mainly involves the collection of 3D high-density electrical data. While collecting 3D high-density electrical profile data, it is necessary to collect auxiliary electrical profile coordinate information, such as the profile start point, end point, and intermediate coordinate information between the two points, so as to determine the specific location of the profile in the survey area and the height difference between the start point and the end point of the profile, which is used for subsequent 3D inversion.

[0089] The three-dimensional high-density electrical data acquisition in step 2 includes the following steps:

[0090] Step 2.1: Insert two electrode rods as current electrodes in the test area, and pass direct current into the current electrodes to establish an artificial electric field;

[0091] After allocating the positive and negative poles of the current electrode, current is passed into the current electrode, using the geology as a resistance material to establish an artificial electric field;

[0092] Step 2.2: inserting two electrode rods as potential levels into the artificial electric field, and passing direct current;

[0093] Insert a motor rod between the current electrodes as a potential level, and measure the potential difference between the two potential levels after passing direct current;

[0094] Step 2.3: measuring the potential difference between the electrodes through the potential level, and using Ohm's law to calculate the resistivity of the underground material between the potential levels;

[0095] According to Ohm's law: R = U / I, U is the voltage intensity of the artificially established electric field; I is the potential difference between the two current electrodes; Substitute the two into the formula to find the resistance between the two current electrodes;

[0096] Step 2.4: measuring the resistivity of different formations by changing the distance between the potential level and the current electrode in the artificial electric field;

[0097] By adjusting the position of the current electrode, the resistivity of the geology in different areas of the source can be measured, and then the resistivity distribution of the entire source can be measured.

[0098] Step 3: At the same time, collect relevant historical information about the contaminated land for correction and calibration of the three-dimensional geophysical model;

[0099] Historical data include: historical structures, production history, etc. The accuracy of detection can be further improved by combining historical data with existing data;

[0100] Step 4: Combine the acquired data with the collected related information to perform data editing and processing and three-dimensional inversion;

[0101] 3D inversion refers to the inversion processing of 3D high-density original profile data + profile start point, end point and terrain data through professional inversion software;

[0102] Step 5: Conduct a comprehensive backwash study on the 3D inversion results, and conduct a comprehensive study and analysis based on the resistivity and water content parameters of different stratum lithology and aquifer structures;

[0103] After comprehensive analysis of the inversion results, we can find out the obvious electrical anomaly areas that may be caused by the infiltration of DNAPL and the contamination of groundwater. This area usually shows obvious local resistance anomalies, mostly in the form of clusters or strips, and generally extends underground to a certain extent.

[0104] Step 6: After the above anomaly analysis, the suspected contaminated area is delineated and the reliability and authenticity of the anomaly is verified by geological radar survey; geological radar uses the difference in electromagnetic field wave propagation speed of underground media as the physical property basis, observes and studies the distribution law of artificially established underground stable electromagnetic fields, and determines the depth and range of the anomaly through the distribution of electromagnetic fields, and then compares it with the results of three-dimensional inversion;

[0105] In step 6, the geological radar survey verification includes the following steps:

[0106] Step 6.1: Install the geological radar on a mobile platform and control the mobile platform to move evenly in the site; the geological radar sends electromagnetic field waves to the underground during the movement, and determines the scope of DNAPL pollution by observing and studying the distribution law of artificially established underground stable electromagnetic fields based on the difference in electromagnetic field wave propagation speed of underground media;

[0107] Step 6.2: The time difference ΔT between the ground reflected wave and the underground reflected wave is measured by emitting electromagnetic field waves through the geological radar. According to the formula: H = V*ΔT / 2, the underground abnormal burial depth H is measured;

[0108] H is the formation thickness, which is used to compare with the 3D inversion results; Step 6.2.1: From the formula: The propagation speed of electromagnetic field waves in underground media is measured; where C is the propagation speed of electromagnetic field waves in the atmosphere, which is about 3×108m / s; ε is the relative dielectric constant, which depends on the dielectric constant of the materials constituting each layer of the underground; the dielectric constant of rock and soil bodies is different. If there are unfavorable geological bodies such as broken zones, human disturbances, faults and karst water-rich zones, and seepage-proof broken zones leading to leachate enrichment zones, there will be obvious differences between them and intact surrounding rocks. Geological radar can identify the existence of geological anomalies such as these geological bodies within the detection depth range;

[0109] Dielectric constant table of rock and soil layers

[0110] medium Air water clay Mudstone sandstone ε 1 81 8-15 7 6

[0111] Step 6.3: At the same time, according to the emission and reception of electromagnetic field waves during the movement of the geological radar, a radar profile consisting of reflection records is obtained;

[0112] The distribution of the event axis obtained from the radar profile has an intuitive corresponding relationship with the depth and shape of different underground dielectric targets;

[0113] Step 7: Conduct comprehensive analysis and comparison between the 3D inversion structure and the geological radar detection results to confirm the abnormal target area;

[0114] After the abnormal target area is determined based on comprehensive analysis and comparison, the abnormal target area is processed;

[0115] Step 8: Conduct DNAPL water pollution control in the confirmed areas;

[0116] Intercept sewage in the confirmed areas to prevent further spread of DNAPL pollution and treat sewage;

[0117] Treat shallow contamination through gas phase extraction technology: inject air or nitrogen into the contaminated area to volatilize DNAPL into the gas phase, and then extract it through extraction wells for treatment;

[0118] Treat deep-seated pollution through thermal treatment technology: using thermal energy to heat DNAPL above its boiling point, causing it to evaporate and be collected and processed through an extraction system;

[0119] Soil vapor extraction is used to treat contamination in deep and complex geological conditions: by heating the soil and injecting air, DNAPL is volatilized and collected and treated through pipelines.

[0120] Figure 2 This is an example diagram of three-dimensional inversion. The horizontal axis is resistivity and the vertical axis is geological elevation. The resistivity of the geology at different elevations is determined based on the three-dimensional inversion, and then the contaminated area is determined based on the resistivity. Because DNAPL contaminated areas usually show obvious local resistance anomalies, areas with higher resistivity are circled as suspected DNAPL contaminated areas, which are circled by the dotted circle in the figure for comparison with subsequent geological radar detection results.

[0121] like Figures 3 to 13As shown, a device includes a mobile platform 1, a geological radar 2, a knob 3, a fixing component 4, a fixing plate 5, an adjusting component 6, a lower pressure plate 7 and an elastic gasket; a driving cavity 11 is opened on the mobile platform 1, a knob 3 is installed on the mobile platform 1, a fixing component 4 is provided below the knob 3, the fixing component 4 is located in the driving cavity 11, a fixing plate 5 is installed in the driving cavity 11, after the geological radar 2 is placed on the mobile platform 1, the knob 3 drives the fixing plate 5 to slide horizontally through the fixing component 4, the fixing plate 5 slides horizontally close to the geological radar 2, thereby limiting the displacement of the geological radar 2 in the horizontal direction, when the moving platform 1 is rotated, the fixing plate 5 moves horizontally, and the fixing plate 5 moves horizontally close to the geological radar 2, thereby limiting the displacement of the geological radar 2 in the horizontal direction. When the moving platform 1 encounters a bump or a pit, the geological radar 2 remains stable in the horizontal direction without shaking; a sliding cavity 51 is opened on the fixed plate 5, and a gear is provided at the top of the sliding cavity 51. An adjusting component 6 is installed in the sliding cavity 51, and a lower pressure plate 7 is provided above the adjusting component 6. The lower pressure plate 7 is provided with gear teeth that cooperate with the adjusting component 6. When the fixed plate 5 slides horizontally, the fixed component 4 drives the lower pressure plate 7 to slide vertically through the adjusting component 6. The vertical sliding of the lower pressure plate 7 limits the displacement of the geological radar 2 in the vertical direction to avoid the ups and downs of the geological radar 2 when the ground is uneven.

[0122] The driving shaft 41 is located in the driving cavity 11, one end of the driving shaft 41 is fixedly connected to the knob 3, and the other end of the driving shaft 41 is fixedly connected to the driving wheel 42; a reciprocating rack 43 is slidably installed on one end of the driving wheel 42; when the geological radar 2 is placed on the mobile platform 1, the staff rotates the knob 3, and the knob 3 drives the driving wheel 42 to rotate through the driving shaft 41, and the driving wheel 42 then drives the reciprocating rack 43 meshing with it to slide, and the reciprocating rack 43 meshes with the driving wheel 44; the reciprocating rack 43 plays a role in motion transmission, transmitting the rotation of the driving wheel 42 to the driving wheel 44, and the driving wheel 44 is divided into a first step 441 and a second step 442, the first step 441 meshes with the reciprocating rack 43, the second step 442 meshes with the driven wheel 45, and the first step 441 meshes with the reciprocating rack 43, and then under the action of the reciprocating rack 43, the driving wheel 44 is driven to rotate as a whole, and the driving wheel 44 is then ... The motion is transmitted to the driven wheel 45 through the second step 442; there are four driven wheels 45, which are arranged in a circular array outside the driving wheel 44, and the driven wheel 45 is divided into a transmission section 451 and a driving section 452, the transmission section 451 is meshed with the second step 442, and the driving section 452 is meshed with the transmission rod 46, and the transmission section 451 is meshed with the second step 442 to drive the driven wheel 45 to rotate as a whole; the transmission rod 46 is provided with a strip The groove 461 and the through hole, one side of the strip groove 461 is provided with gear teeth meshing with the driving section 452, a fixing plate 5 is fixedly installed on the transmission rod 46, and a cavity 462 communicating with the sliding cavity 51 is opened on the transmission rod 46; when the driven wheel 45 rotates, it meshes with the gear teeth in the strip groove 461, and then drives the transmission rod 46 to slide horizontally through the gear teeth, and the transmission rod 46 slides horizontally along the direction of the geological radar 2 to fix the geological radar 2 and keep the geological radar 2 stable;

[0123] The staff rotates the knob 3, and the knob 3 drives the driving shaft 41 to rotate, and the driving shaft 41 drives the driving wheel 42 to rotate synchronously. The driving wheel 42 meshes with the reciprocating rack 43, driving the reciprocating rack 43 to slide horizontally, and the reciprocating rack 43 meshes with the first step 441 of the driving wheel 42, and drives the driving wheel 44 to rotate as a whole through the first step 441. During the rotation of the driving wheel 44, the second step 442 meshes with the transmission section 451 of the driven wheel 45, and then drives the driven wheel 45 to rotate through the transmission section 451. During the rotation of the transmission wheel 63, the driving section 452 thereon meshes with the gear teeth on the transmission rod 46, thereby driving the transmission rod 46 to slide horizontally, and the transmission rod 46 drives the fixing plate 5 to slide along the direction of the geological radar 2, so as to fix the geological radar 2 horizontally.

[0124] The sliding rack 61 is slidably installed in the cavity 462, and one end of the sliding rack 61 is meshed with the driving section 452 of the driven wheel 45; the other end of the sliding rack 61 is meshed with the rotating wheel 62, and the pitch of the gear teeth at both ends of the sliding rack 61 is different; a transmission wheel 63 is provided on one side of the rotating wheel 62, and when the driven wheel 45 rotates, its driving section 452 is meshed with the sliding rack 61, driving the sliding rack 61 to slide, and the sliding rack 61 is meshed with the rotating wheel 62 during the sliding process, and the rotating wheel 63 is provided on one side of the rotating wheel 62. The transmission wheel 63 is driven to rotate; the transmission wheel 63 is rotatably installed in the cavity 462, and the transmission wheel 63 is slidably installed on the rotating shaft 64. A tension spring 65 is provided between the transmission wheel 63 and the rotating shaft 64, and the tension spring 65 is used to realize the reset of the transmission wheel 63; a limiting groove 641 is provided in an annular array on the rotating shaft 64, and a limiting block 631 is provided in an annular array on the inner wall of the transmission wheel 63 to cooperate with the limiting groove 641, and the limiting block 631 is provided with a A tension spring 65 is connected between the limiting grooves 641. When the transmission wheel 63 rotates, the transmission wheel 63 squeezes the limiting groove 641 through the limiting block 631, thereby driving the rotating shaft 64 to rotate. When the transmission wheel 63 and the rotating wheel 62 are disengaged and move downward, the transmission wheel 63 moves vertically downward along the limiting groove 641, and the transmission wheel 63 pulls the tension spring 65 to put it in a stretched state. The thickness of the transmission wheel 63 is consistent with the thickness of the rotating wheel 62, and the height of the limiting groove 641 is at least twice the thickness of the transmission wheel 63, so that the transmission wheel 63 can smoothly disengage the teeth from the rotating wheel 62; the rotating wheel 62 and the transmission wheel 63 are both provided with inclined surfaces on the gear teeth, and the inclined surfaces are used to reduce the friction between the rotating wheel 62 and the transmission wheel 63, thereby reducing the wear of the rotating wheel 62 and the transmission wheel 63 when disengaging and meshing, thereby increasing the service life of the rotating wheel 62 and the transmission wheel 63, and at the same time, guiding the meshing of the rotating wheel 62 and the transmission wheel 63;

[0125] The rotating shaft 64 passes through the cavity 462 and extends into the sliding cavity 51, and a thread is provided on the rotating shaft 64; the slider 66 is nested on the rotating shaft 64, and a thread matching the rotating shaft 64 is provided on the slider 66. The transmission wheel 63 drives the rotating shaft 64 to rotate synchronously during the rotation process. During the rotation of the rotating shaft 64, the thread squeezes the screw groove on the slider 66, thereby driving the slider 66 to slide back and forth on the rotating shaft 64; a lower pressure plate 7 is rotatably installed on the slider 66, and a deflection rack 67 is provided above the slider 66; the deflection rack 67 is fixedly installed on the top of the sliding cavity 51, and the deflection rack 67 cooperates with the gear teeth on the lower pressure plate 7; when the slider 66 slides downward, it drives the lower pressure plate 7 to move synchronously, and when the lower pressure plate 7 slides downward, the gear teeth on it mesh with the deflection rack 67, and the lower pressure plate 7 is rotated 9 0° rotation, from a vertical state to a horizontal state, limits the freedom of the geological radar 2 in the up and down directions, thereby ensuring the stability of the installation of the geological radar 2, preventing the geological radar 2 from shaking under the action of external force, and affecting the survey effect. A moving cavity 71 is provided on the lower pressure plate 7, and a connecting rod mechanism 68 is provided between the lower pressure plate 7 and the slider 66. The connecting rod mechanism 68 is used to realize the disengagement of the rotating wheel 62 and the transmission wheel 63. After the lower pressure plate 7 has completed the restriction of the up and down freedom of the geological radar 2, and the fixed plate 5 has not yet completed the restriction of the freedom around the geological radar 2, at this time, the transmission wheel 63 and the rotating wheel 62 are disengaged, and the slider 66 is no longer moving, so that the lower pressure plate 7 is also no longer moving, maintaining the restriction on the geological radar 2, and preventing the lower pressure plate 7 from continuing to move downward and causing damage to the geological radar 2;

[0126] The connecting rod mechanism 68 includes a driving rod 681, a pulling rod 682, a hinged rod 683, an active rod 684, a driven rod 685 and a push rod 686; the driving rod 681 is slidably installed in the moving cavity 71, and a protrusion is provided on the driving rod 681 to cooperate with the moving cavity 71 to limit the position of the driving rod 681 and prevent the driving rod 681 from sliding down under the action of gravity. The driving rod 681 is provided with an inclined groove, and the pulling rod 682 is arranged vertically with the driving rod 681. The pulling rod 682 is provided with a The pull rod 682 is fixedly connected to the hinge rod 683, and the two ends of the hinge rod 683 are respectively connected to the active rod 684, and the active rod 684 is rotatably connected to the driven rod 685. The slider 66 is provided with a slide groove for limiting the movement trajectory of the driven rod 685. The connection point between the active rod 684 and the driven rod 685 is coaxial with the connection point between the lower pressure plate 7 and the slider 66, so that the driven rod 685 will not be driven to rotate during the 90° deflection of the lower pressure plate 7, so that the active rod 684 can rotate around the driven rod 685. The connection point 85 rotates synchronously with the lower pressure plate 7, and the driven rod 685 is slidably installed on the slider 66. A push rod 686 is provided below the driven rod 685; the push rod 686 is located above the transmission wheel 63. When the lower pressure plate 7 fixes the geological radar 2, the lower pressure plate 7 gradually contacts the geological radar 2, and the driving rod 681 on the lower pressure plate 7 moves under the action of the geological radar 2, and pushes the pull rod 682 through the inclined groove. The pull rod 682 then pushes the hinged rod 683 to slide horizontally, and the hinged rod 683 drives the active The rod 684 slides horizontally, the active rod 684 pushes the driven rod 685 to move vertically downward, the driven rod 685 drives the push rod 686 to move vertically downward, the push rod 686 pushes the transmission wheel 63 and the rotating wheel 62 to disengage the teeth, the lower pressure plate 7 is no longer moving, and the active plate supports and fixes the lower pressure plate 7. When the mobile platform 1 is subjected to external force, the geological radar 2 will generate a force on the lower pressure plate 7, thereby driving the lower pressure plate 7 to deflect upward, and the lower pressure plate 7 remains fixed under the action of the active rod 684, thereby improving the fixing effect on the lower pressure plate 7;

[0127] When the driven wheel 45 drives the transmission rod 46 to slide along the center, the driven wheel 45 is meshed with the sliding rack 61 at the same time, driving the sliding rack 61 to slide horizontally in the cavity 462, and the sliding rack 61 slides horizontally to drive the rotating wheel 62 to rotate, and the rotating wheel 62 drives the transmission wheel 63 to be active, and the transmission wheel 63 squeezes the limiting groove 641 through the limiting block 631, thereby driving the rotating shaft 64 to rotate, and the rotating shaft 64 squeezes the screw groove on the slider 66 through the thread, thereby driving the slider 66 to slide vertically downward, and the slider 66 drives the lower pressure plate 7 to move vertically downward, and the gear teeth on the lower pressure plate 7 are meshed with the deflection rack 67 during the sliding process, and the lower pressure plate 7 is deflected 90°, and the lower pressure plate 7 drives the active rod 684 thereon to rotate synchronously;

[0128] When the lower pressure plate 7 fixes the geological radar 2, the driving rod 681 on the lower pressure plate 7 contacts the geological radar 2 and slides vertically upward under the action of the geological radar 2. The driving rod 681 pushes the pull rod 682 to slide horizontally through the inclined groove, and the pull rod 682 pushes the hinged rod 683 to slide synchronously. The hinged rod 683 drives the active rod 684 to move synchronously. The active rod 684 pushes the driven rod 685 to move vertically downward. The driven rod 685 drives the push rod 686 to move synchronously. The push rod 686 pushes the transmission wheel 63 and the rotating wheel 62 to disengage the teeth. The lower pressure plate 7 no longer moves, thereby completing the fixation of the geological radar 2 in the up and down directions.

[0129] During use of the present invention, the staff rotates the knob 3 for different numbers of circles according to the sizes of different geological radars 2, thereby driving the fixing plate 5 to move different distances to fix the geological radars 2 of different specifications. The fixing plate 5 fixes the geological radar 2 from four vertices so that the geological radar 2 is more evenly stressed. At the same time, the four fixing plates 5 move synchronously, which can ensure that the geological radar 2 is always at the center position of the mobile platform 1, and when the mobile platform 1 shakes, the geological radar 2 can be prevented from being unevenly stressed.

[0130] When the device of this embodiment is in use, the staff places the geological radar 2 on the mobile platform 1, and then rotates the knob 3, the knob 3 drives the driving shaft 41 to rotate, the driving shaft 41 drives the driving wheel 42 to rotate synchronously, the driving wheel 42 is engaged with the reciprocating rack 43, and the reciprocating rack 43 drives the horizontal sliding of the reciprocating rack 43, the reciprocating rack 43 drives the driving wheel 44 to rotate, the driving wheel 44 drives the driven wheel 45 to rotate, the driven wheel 45 rotates and meshes with the gear teeth on the transmission rod 46, and then drives the transmission rod 46 to slide horizontally, the transmission rod 46 drives the fixed plate 5 to slide along the direction of the geological radar 2, and at the same time The driven wheel 45 meshes with the sliding rack 61 to drive the sliding rack 61 to slide horizontally in the cavity 462. The sliding rack 61 slides horizontally to drive the intermediate wheel 62 to rotate. The intermediate wheel 62 drives the transmission wheel 63 to be active. The transmission wheel 63 drives the rotating shaft 64 to rotate synchronously. The rotating shaft 64 drives the slider 66 to slide vertically downward through the thread and the groove. The slider 66 drives the lower pressing plate 7 to move vertically downward. During the sliding process, the gear teeth on the lower pressing plate 7 mesh with the deflection rack 67. The lower pressing plate 7 deflects 90 degrees, and the lower pressing plate 7 drives the active rod 684 thereon to rotate synchronously.

[0131] When the lower pressure plate 7 gradually fixes the geological radar 2, the driving rod 681 on the lower pressure plate 7 contacts the geological radar 2 and slides vertically upward under the action of the geological radar 2. The driving rod 681 pushes the pull rod 682 to slide horizontally through the inclined groove, and the pull rod 682 pushes the hinged rod 683 to slide synchronously. The hinged rod 683 drives the active rod 684 to move synchronously. The active rod 684 pushes the driven rod 685 to move vertically downward. The driven rod 685 drives the push rod 686 to move synchronously. The push rod 686 pushes the transmission wheel 63 to slide downward and disengage the teeth of the rotating wheel 62. The transmission wheel 63 pulls the tension spring 65, and the lower pressure plate 7 stops moving, completing the fixation of the geological radar 2 in the up and down directions;

[0132] When it is necessary to take out the geological radar 2, the staff reverses the knob 3, and the knob 3 drives the driving wheel 42 to reverse through the driving shaft 41, and the driving wheel 42 drives the reciprocating rack 43 to reset, and the reciprocating rack 43 drives the driving wheel 44 to reverse, and the driving wheel 44 drives the driven wheel 45 to reverse, and the driven wheel 45 drives the transmission rod 46 to reset, and the transmission rod 46 drives the fixing plate 5 to reset, and the fixing plate 5 resets and drives the lower pressure plate 7 to slide synchronously, and the lower pressure plate 7 is separated from the geological radar 2, and the driving rod 681 is no longer squeezed by external force, and the tension spring 65 pulls the transmission wheel 63 to reset, and the transmission wheel 63 is meshed with the rotating wheel 62. At this time, the driven wheel 45 is reset by sliding The movable rack 61 drives the rotating wheel 62 to reverse, the rotating wheel 62 drives the transmission wheel 63 to reverse, the transmission wheel 63 drives the rotating shaft 64 to reverse, the rotating shaft 64 drives the slider 66 to move in the opposite direction and reset, the slider 66 drives the lower pressure plate 7 to engage with the deflection rack 67 during the resetting process, the lower pressure plate 7 reversely deflects and resets, at the same time, the transmission wheel 63 pushes the push rod 686 to reset, the push rod 686 drives the driven rod 685 to reset, the driven rod 685 pushes the active rod 684 to reset, the active rod 684 drives the articulated rod 683 to move synchronously, the articulated rod 683 pushes the pull rod 682 to reset, the pull rod 682 drives the driving rod 681 to reset, and the work is completed.

[0133] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for treating DNAPL water pollution range by radio field survey, characterized in that: The following steps are involved: Step 1: Conduct site survey on the contaminated land to be tested, and use the measured site data for network deployment and 3D high-density electrical inversion; Step 2: Use a three-dimensional high-density electrical instrument to collect data based on the deployed measurement network; Step 3: At the same time, collect relevant historical information about the contaminated land for correction and calibration of the three-dimensional geophysical model; Step 4: Combine the acquired data with the collected related information to perform data editing and processing and three-dimensional inversion; Step 5: Conduct a comprehensive backwash study on the 3D inversion results, and conduct a comprehensive study and analysis based on the resistivity and water content parameters of different stratum lithology and aquifer structures; Step 6: After the above anomaly analysis, the suspected contaminated area is delineated and the reliability and authenticity of the anomaly is verified through geological radar survey; Step 7: Conduct comprehensive analysis and comparison between the 3D inversion structure and geological radar detection results to confirm the abnormal target area; Step 8: Conduct DNAPL water pollution control in the confirmed areas.

2. The method according to claim 1, characterized in that: In step 2, the data acquisition includes three-dimensional high-density electrical data acquisition and electrical profile coordinate information acquisition.

3. The method according to claim 2, characterized in that: In step 2, the data collection includes the following steps: Step 2.1: Insert two electrode rods as current electrodes in the test area, and pass direct current into the current electrodes to establish an artificial electric field; Step 2.2: inserting two electrode rods as potential levels into the artificial electric field, and passing direct current; Step 2.3: measuring the potential difference between the electrodes through the potential level, and using Ohm's law to calculate the resistivity of the underground material between the potential levels; Step 2.4: The resistivity of different formations is measured by changing the distance between the potential level and the current electrode in the artificial electric field.

4. The method according to claim 1, characterized in that: In step 6, the geological radar survey verification includes the following steps: Step 6.1: Install the geological radar on the mobile platform and control the mobile platform to move evenly in the site; Step 6.2: The time difference ΔT between the ground reflected wave and the underground reflected wave is measured by emitting electromagnetic field waves through the geological radar. According to the formula: H = V*ΔT / 2, the underground abnormal burial depth H is measured; Step 6.2.1: According to the formula: The propagation speed of electromagnetic field waves in underground media was measured; In the formula, C is the propagation speed of electromagnetic field waves in the atmosphere, which is about 3×108m / s; ε is the relative dielectric constant, which depends on the dielectric constant of the materials constituting each layer of the underground. Step 6.3: At the same time, according to the emission and reception of electromagnetic field waves during the movement of the geological radar, a radar profile composed of reflection records is obtained.

5. A device for surveying and verifying a contaminated land plot by using the method according to any one of claims 1 to 4, comprising a mobile platform (1) and a geological radar (2), characterized in that: It also includes a knob (3), a fixing assembly (4), a fixing plate (5), an adjustment assembly (6) and a lower pressing plate (7); The mobile platform (1) is provided with a driving cavity (11), a knob (3) is installed on the mobile platform (1), a fixing component (4) is provided below the knob (3), the fixing component (4) is located in the driving cavity (11), a fixing plate (5) is installed in the driving cavity (11), and after the geological radar (2) is placed on the mobile platform (1), the knob (3) drives the fixing plate (5) to slide horizontally through the fixing component (4); The fixed plate (5) is provided with a sliding cavity (51), an adjusting component (6) is installed in the sliding cavity (51), a lower pressure plate (7) is provided above the adjusting component (6), and the lower pressure plate (7) is provided with gear teeth that cooperate with the adjusting component (6); when the fixed plate (5) slides horizontally, the fixed component (4) drives the lower pressure plate (7) to slide vertically through the adjusting component (6).

6. The system according to claim 5, characterized in that: The fixing assembly (4) comprises a driving shaft (41), a driving wheel (42), a reciprocating rack (43), a driving wheel (44), a driven wheel (45) and a transmission rod (46); The driving shaft (41) is located in the driving cavity (11), one end of the driving shaft (41) is fixedly connected to the knob (3), and the other end of the driving shaft (41) is fixedly connected to the driving wheel (42); A reciprocating rack (43) is slidably mounted on one end of the driving wheel (42); The reciprocating rack (43) is meshed with the driving wheel (44); The driving wheel (44) is divided into a first step (441) and a second step (442), the first step (441) is meshed with the reciprocating rack (43), and the second step (442) is meshed with the driven wheel (45); There are four driven wheels (45), which are arranged in a ring array outside the driving wheel (44), and the driven wheels (45) are divided into a transmission section (451) and a driving section (452), the transmission section (451) is meshed with the second step (442), and the driving section (452) is meshed with the transmission rod (46); The transmission rod (46) is provided with a strip groove (461), one side of the strip groove (461) is provided with gear teeth meshing with the driving section (452), a fixing plate (5) is fixedly mounted on the transmission rod (46), and a cavity (462) communicating with the sliding cavity (51) is provided on the transmission rod (46).

7. The system according to claim 6, characterized in that: The adjustment assembly (6) comprises a sliding rack (61), a rotating wheel (62), a transmission wheel (63), a rotating shaft (64), a tension spring (65), a sliding block (66), a deflection rack (67) and a connecting rod mechanism (68); The sliding rack (61) is slidably installed in the cavity (462), and one end of the sliding rack (61) is meshed with the driving section (452) of the driven wheel (45); the other end of the sliding rack (61) is meshed with the rotating wheel (62), and the gear teeth at both ends of the sliding rack (61) have different pitches; A transmission wheel (63) is provided on one side of the rotating wheel (62); The transmission wheel (63) is rotatably mounted in the cavity (462), the transmission wheel (63) is slidably mounted on the rotating shaft (64), and a tension spring (65) is provided between the transmission wheel (63) and the rotating shaft (64); The rotating shaft (64) passes through the cavity (462) and extends into the sliding cavity (51), and a thread is formed on the rotating shaft (64); The slider (66) is nested on the rotating shaft (64), a thread matching the rotating shaft (64) is provided on the slider (66), a lower pressure plate (7) is rotatably mounted on the slider (66), and a deflection rack (67) is provided above the slider (66); The deflection rack (67) is fixedly mounted on the top of the sliding cavity (51), and the deflection rack (67) cooperates with the gear teeth on the lower pressing plate (7); A connecting rod mechanism (68) is provided between the lower pressing plate (7) and the sliding block (66).

8. The system according to claim 7, characterized in that: The connecting rod mechanism (68) comprises a driving rod (681), a pulling rod (682), a hinged rod (683), an active rod (684), a driven rod (685) and a push rod (686); The driving rod (681) is slidably mounted in the moving cavity (71), and an inclined groove is provided on the driving rod (681); The pull rod (682) is arranged vertically with the driving rod (681), an inclined groove matching with the driving rod (681) is provided on the pull rod (682), and the pull rod (682) is fixedly connected with the hinge rod (683); Both ends of the hinged rod (683) are respectively connected to active rods (684); The active rod (684) is rotatably connected to the driven rod (685), the driven rod (685) is slidably mounted on the slider (66), and a push rod (686) is provided below the driven rod (685); The push rod (686) is located above the transmission wheel (63).

9. The system according to claim 8, characterized in that: The gear teeth of the rotating wheel (62) and the transmission wheel (63) are both provided with inclined surfaces.

10. The system according to claim 9, characterized in that: The rotating shaft (64) is provided with a limiting groove (641) in an annular array, and the inner wall of the transmission wheel (63) is provided with a limiting block (631) in an annular array that cooperates with the limiting groove (641), and a tension spring (65) is connected between the limiting block (631) and the limiting groove (641).

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