An automatic impurity removal device for soil heavy metal detection

Abstract

The invention discloses an automatic impurity removal device for soil heavy metal detection, belonging to the technical field of soil detection; the invention comprises a base, a center groove is arranged at the center of the top of the base, a cylinder covering the center groove is arranged at the top of the base, a V-shaped scraper is arranged on the inner wall of the bottom of the cylinder, an air intake grille is arranged on the cylinder wall in the middle of the cylinder, a ball screen mechanism is arranged on the inner wall of the top of the cylinder, a top cover is hinged on the top of the cylinder, and a control panel is arranged on the top of the top cover; the invention can therefore perform multi-angle rotary stirring preliminary impurity removal on the sample soil, and with the assistance of pure hot air flow, the sample soil is continuously heated and dehydrated, and the sample soil is accelerated to be quickly crushed and granulated during the rotary stirring process, which is helpful for separating impurities from soil, and the filter press ring can be used to further filter and extrude the crushed soil after the initial screening, so as to realize grinding extrusion impurity removal of the sample soil, further improve the purity of the sample soil, and reduce the interference of impurities on detection.

Description

Technical Field

[0001] The invention relates to the technical field of soil detection, and in particular to an automatic impurity removal device for soil heavy metal detection. Background Art

[0002] Soil heavy metal detection refers to the use of a series of chemical analysis, instrument testing and other methods to determine whether the soil contains heavy metal elements so as to take appropriate measures. These heavy metal elements may have a negative impact on the environment and ecology, so accurate detection is crucial for soil management and pollution control. The collected soil samples may contain a variety of impurities, such as iron-manganese nodules, lime nodules, stones, tiles, plant residues, etc. These impurities may interfere with the test results, resulting in inaccurate or uninterpretable results. Some impurities may block the instrument's sample inlet or interfere with the instrument's measurement system, thereby affecting the instrument's stability and measurement accuracy, and may also affect the normal operation of the detection instrument;

[0003] In combination with the above content, it should be noted that during the use of traditional soil impurity removal devices, affected by factors such as sample soil moisture and internal impurity ratio, some impurities or soil are stuck on the impurity removal structure during the impurity removal process, affecting the overall sample soil impurity removal processing efficiency, and fine impurities cannot be effectively removed, thereby affecting the accuracy of subsequent soil heavy metal detection;

[0004] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic impurity removal device for soil heavy metal detection, which collects data during the operation of the impurity removal device, obtains the fluctuation value of the soil impurity ratio and the fine soil fallout rate, and efficiently monitors and analyzes the screening efficiency of the device before and during impurity removal, that is, compares and analyzes the collected data with the preset stored data, obtains relevant rating signals, and controls relevant components to perform compensatory operations accordingly. It can not only perform multi-angle rotary stirring preliminary impurity removal on the sample soil, and with the assistance of pure hot air flow, continuously heats and removes water from the sample soil, accelerates the rapid fine crushing and granulation of the sample soil during the rotary stirring process, which is helpful for separating impurities from soil, but also can use the filter press ring to further perform filter pressing and extrusion treatment on the finely crushed soil after the initial screening, realize grinding extrusion impurity removal of the sample soil, further improve the purity of the sample soil, reduce the interference of impurities on detection, and solve the problems raised.

[0006] To achieve the above object, the present invention provides the following technical solution: an automatic impurity removal device for soil heavy metal detection, comprising a base, a center groove is arranged at the center of the top of the base, a cylinder covering the center groove is arranged at the top of the base, a V-shaped scraper is arranged on the inner wall of the bottom of the cylinder, an air intake grille is arranged on the middle wall of the cylinder, a ball screen mechanism is arranged on the inner wall of the top of the cylinder, a top cover is hinged on the top of the cylinder, and a control panel is arranged on the top of the top cover;

[0007] The ball screen mechanism includes multiple groups of fixed frames, upper balls and lower balls are arranged between the multiple groups of fixed frames, a servo motor is arranged at the bottom of the end surface of the fixed frame, an air guide frame is arranged below the lower ball, a filter press ring is arranged below the air guide frame, a filter press cone is arranged on the top of the filter press ring, and a ring frame is arranged below the filter press ring.

[0008] Furthermore, a pull-out box is slidably arranged in the middle of the base, a collecting groove cooperating with the central groove is arranged on the top of the pull-out box, and the bottom of the cylinder is covered on the outside of the central groove.

[0009] Furthermore, a sealing ring is provided in a depression at the top of the cylinder, an air intake ring is provided inside the sealing ring, and a conduit connecting the air intake ring, the air intake grille and the V-shaped scraper is embedded in the cylinder wall.

[0010] Furthermore, a rotary cylinder 1 is arranged on the inner wall of the bottom of the cylinder, a cone ring connected to the V-shaped scraper is arranged on the inner wall of the rotary cylinder 1, a support ring connected to the V-shaped scraper is arranged below the cone ring, and a plurality of groups of microholes are arranged on the top surface of the V-shaped scraper.

[0011] Furthermore, a rotary cylinder 2 is provided at one end of the fixed frame close to the lower ball, a limit frame is provided on the second end face of the rotary cylinder, the servo motor is fixed at the bottom of the limit frame, a ring is provided on the inner wall of the limit frame, a rotating ring connecting the upper ball and the lower ball is provided on the inner wall of the ring, and multiple groups of stirring paddles are symmetrically arranged inside the lower ball and the upper ball.

[0012] Furthermore, an air duct connected to the air intake grille is arranged inside the air guide frame, a heater is arranged inside the air duct, a jet cone is arranged in the middle of the air guide frame, an exhaust fan is arranged inside the jet cone, and a support sleeve connected to the jet cone is arranged at the bottom of the exhaust fan.

[0013] Furthermore, a fine filter cone mesh is arranged at the bottom of the filter press ring, the filter press cone is arranged on the top of the fine filter cone mesh, a wear-resistant soft sleeve is arranged on the outer wall of the bottom of the filter press cone, and a lifting cylinder is arranged at the center of the filter press cone.

[0014] Furthermore, a plurality of groups of reinforcing ribs arranged in a ring are provided on the top of the ring frame, a rotating motor is provided at the center of the top of the reinforcing rib, and the outer shell of the rotating motor is connected to the fine filter cone net and the lifting cylinder, a slag discharge valve connected to the bottom of the fine filter cone net is provided on the side of the top of the reinforcing rib, and a rotary cylinder three connected to the reinforcing rib is provided at the bottom of the slag discharge valve.

[0015] Furthermore, the control panel is internally provided with a processor, a data acquisition module, a self-checking analysis module and a signal execution module;

[0016] The data acquisition module is used to collect the soil and debris ratio fluctuation value TZz located inside the ball screen mechanism and the fine soil falling flow rate XTz located through the central groove during the use of the impurity removal device, and send the soil and debris ratio fluctuation value TZz and the fine soil falling flow rate XTz to the self-checking analysis module through the processor;

[0017] After receiving the soil and debris ratio fluctuation value TZz and the fine soil fall flow rate XTz, the self-check analysis module immediately analyzes the filter screening efficiency of the impurity removal device. The specific analysis process is as follows: the soil and debris ratio fluctuation value TZz and the fine soil fall flow rate XTz within the time threshold are obtained, and the filter screening efficiency coefficient LSi is obtained through formula analysis, and the preset filter screening efficiency coefficient YSi stored and entered is retrieved from the processor for comparison and analysis with the filter screening efficiency coefficient LSi; if the filter screening efficiency coefficient LSi ≥ the preset filter screening efficiency coefficient YSi, it is determined that the filter screening of the impurity removal device within the time threshold is abnormal, and a control signal is generated, and the generated signal is sent to the signal execution module through the processor;

[0018] After receiving the control signal, the signal execution module immediately controls the servo motor to work; if the filter efficiency coefficient LSi is less than the preset filter efficiency coefficient YSi, no signal is generated.

[0019] The beneficial effects of the present invention are:

[0020] 1. The present invention collects data of the impurity removal device during operation to obtain the fluctuation value of the soil impurity ratio and the fine soil fallout rate, and efficiently monitors and analyzes the screening efficiency of the device before and during impurity removal, that is, compares and analyzes the collected data with the preset stored data to obtain relevant rating signals, and controls relevant components to perform compensatory operations accordingly. Therefore, it can not only perform multi-angle rotary stirring preliminary impurity removal on the sample soil, and with the assistance of pure hot air flow, the sample soil is continuously heated and dehydrated, and the sample soil is accelerated to be quickly crushed and granulated during the rotary stirring process, which is helpful for separating impurities from soil, but also use the filter press ring to further filter and extrude the finely crushed soil after the initial screening, so as to realize the grinding extrusion impurity removal of the sample soil, further improve the purity of the sample soil, and reduce the interference of impurities on detection;

[0021] 2. The present invention uses a ball screen mechanism to cover and lock the sample soil that is waiting for impurities to be removed. Under the cooperation of a servo motor and a rotary cylinder, it drives the sample soil to accelerate and impact and crush with the mesh surface and the stirring paddle to form a preliminary rotary screening. Then, the air guide frame is used to guide pure air, so that the sample soil inside the ball screen mechanism is further accelerated to contact with the mesh surface and the stirring paddle under airflow and mechanical inertia, and at the same time, the finely crushed soil in the ball screen mechanism is accelerated to dry and break, and the mesh hole diameter is prevented from being blocked due to adhesion;

[0022] 3. The present invention uses a filter press ring to squeeze and crush the fine soil, so that the soil part is further crushed into particles of suitable particle size, thereby forming an extrusion and screening separation of fine impurities and soil, and facilitating the diversion of multi-level impurities and soil particles after rotary screening and further extrusion and screening separation, thereby improving the overall soil impurity removal efficiency and fine particle size before testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings;

[0024] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0025] Figure 2 A schematic structural diagram of the base of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the cylinder of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the ball screen mechanism of the present invention;

[0028] Figure 5 It is a schematic diagram of the connection structure between the air guide frame and the ball screen mechanism of the present invention;

[0029] Figure 6 It is a structural schematic diagram of the jet cone of the present invention;

[0030] Figure 7 It is a schematic diagram of the connection structure between the filter press ring and the base of the present invention;

[0031] Figure 8 It is a schematic diagram of the expanded structure of the filter press ring of the present invention;

[0032] Fig. 9 It is a flow chart of the system of the present invention.

[0033] Reference numerals: 1, base; 101, center groove; 102, pull-out box; 103, collecting groove; 2, cylinder; 201, sealing ring; 202, air suction ring; 203, conduit; 204, air intake grille; 205, rotary cylinder 1; 206, cone ring; 207, V-shaped scraper; 208, support ring; 3, top cover; 4, ball screen mechanism; 401, lower ball; 402, upper ball; 403, fixed frame; 404, rotary cylinder 2; 405, limit frame; 406, servo motor; 407, stirring paddle; 408, sleeve ring; 409, rotating ring; 5, control panel; 7, air guide frame; 701, jet cone; 702, support sleeve; 703, air duct; 704, heater; 705, exhaust fan; 8, filter press ring; 801, filter press cone; 802, lifting cylinder; 803, ring frame; 804, wear-resistant soft sleeve; 805, rotating motor; 806, reinforcing ribs; 807, slag discharge valve; 808, fine filter cone mesh. DETAILED DESCRIPTION

[0034] 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.

[0035] Embodiment 1: This embodiment is used to solve the problem that during use, the traditional soil impurity removal device is affected by factors such as the sample soil moisture and the proportion of internal impurities, resulting in some impurities or soil sticking to the impurity removal structure during the impurity removal period, affecting the overall sample soil impurity removal processing efficiency, and small impurities cannot be effectively removed, thereby affecting the accuracy of subsequent soil heavy metal detection.

[0036] See also Figure 1 - Fig. 9 As shown, this embodiment is an automatic impurity removal device for soil heavy metal detection, comprising a base 1, a center groove 101 is arranged at the top center of the base 1, a cylinder 2 covering the center groove 101 is arranged at the top of the base 1, a V-shaped scraper 207 is arranged on the inner wall of the bottom of the cylinder 2, an air intake grille 204 is arranged on the middle cylinder wall of the cylinder 2, a ball screen mechanism 4 is arranged on the inner wall of the top of the cylinder 2, a top cover 3 is hinged on the top of the cylinder 2, and a control panel 5 is arranged on the top of the top cover 3. When in use, open the top cover 3, take out the upper ball 402, pour a certain amount of sample soil into the lower ball 401, lock the upper ball 402 on the lower ball 401, close the top cover 3, prompt the top cover 3 to seal the top of the cylinder 2, and start the device operation through the control panel 5 on the top cover 3;

[0037] The ball screen mechanism 4 includes a plurality of fixed frames 403, upper balls 402 and lower balls 401 are arranged between the plurality of fixed frames 403, a servo motor 406 is arranged at the bottom of the end surface of the fixed frame 403, an air guide frame 7 is arranged below the lower ball 401, a filter press ring 8 is arranged below the air guide frame 7, a filter press cone 801 is arranged at the top of the filter press ring 8, and a ring frame 803 is arranged below the filter press ring 8;

[0038] The control panel 5 is internally provided with a processor, a data acquisition module, a self-checking and analyzing module, and a signal execution module; the data acquisition module is used to collect the soil and debris ratio fluctuation value TZz located inside the ball screen mechanism 4 and the fine soil falling flow rate XTz located through the central groove 101 during the use of the impurity removal device, and send the soil and debris ratio fluctuation value TZz and the fine soil falling flow rate XTz to the self-checking and analyzing module via the processor; 10 minutes during the use of the impurity removal device is set as the time threshold;

[0039] It should be noted that: the soil-miscellaneous ratio fluctuation value TZz is expressed as the average value of the maximum and minimum values ​​of the ratio between the soil and impurities inside the ball screen mechanism 4 obtained within the time threshold, the value of the soil-miscellaneous ratio fluctuation value TZz reflects the amount of impurities that can be extracted from the soil sample fed at a single time, and the larger the value of the soil-miscellaneous ratio fluctuation value TZz, the more impurities there are in the soil sample fed at a single time within the time threshold, the fine soil fall flow rate XTz is expressed as the amount of finely crushed soil obtained passing through the central groove 101 within the time threshold, in addition, the soil-miscellaneous ratio fluctuation value TZz is collected by the infrared scanning sensor installed on the inner wall of the collar, and the fine soil fall flow rate XTz is collected by the flow sensor installed on the inner wall of the central groove 101;

[0040] After receiving the soil-impurity ratio fluctuation value TZz and the fine soil fall rate XTz, the self-check analysis module immediately analyzes the filtration efficiency of the impurity removal device. The specific analysis process is as follows:

[0041] Obtain the soil and debris ratio fluctuation value TZz and the fine soil fall flow XTz within the time threshold, and obtain the filter efficiency coefficient LSi through the formula, wherein a and b are the proportional coefficients of the soil and debris ratio fluctuation value TZz and the fine soil fall flow XTz, a>b>0, LSi is expressed as the filter efficiency coefficient, and the preset filter efficiency coefficient YSi stored and entered is retrieved from the processor for comparison and analysis with the filter efficiency coefficient LSi;

[0042] If the filter efficiency coefficient LSi ≥ the preset filter efficiency coefficient YSi, it is determined that the filter of the impurity removal device is abnormal within the time threshold, and a control signal is generated. The generated signal is sent to the signal execution module through the processor. After receiving the control signal, the signal execution module immediately controls the servo motor 406 to work; the servo motor 406 reduces the rotation speed of the driving rotating ring 409, and the rotary cylinder 404 reduces the rotation speed of the limit frame 405;

[0043] The exhaust fan 705 draws external air along the air inlet grille 204 through the air duct 703. The air inlet grille 204 is provided with an air filter element, which filters the external air passing through. When the external air flows along the inside of the air duct 703, the heater 704 heats it to obtain pure hot air. The pure hot air is ejected along the surface of the jet cone 701. The surface of the jet cone 701 is provided with multiple groups of small holes. The pure hot air blows directly toward the ball screen mechanism 4 along the jet cone 701, and the mesh surface, stirring paddle 407 and other metal parts on the ball screen mechanism 4 are continuously heated, so that the sample soil inside the ball screen mechanism 4 is continuously heated and dried, making it easier to be crushed; the pure hot air is blown upward through the crushed soil falling from the bottom of the ball screen mechanism 4, and the crushed soil is thrown around along the bottom of the ball screen mechanism 4 through the continuous rotation interference of the ball screen mechanism 4, and slides along the inner wall of the cylinder 2 to the filter press ring 8;

[0044] The lifting cylinder 802 drives the filter press cone 801 to intermittently slide down through the connecting piece, and the servo motor 406 drives the filter press cone 801 to rotate and slide down through the connecting piece and the lifting cylinder 802 until the wear-resistant soft sleeve 804 contacts the surface of the fine filter cone net 808, so that the squeezed fine soil is further squeezed out along the mesh of the fine filter cone net 808, so that the fine soil is further crushed and used to screen out impurities in the fine soil;

[0045] The rotary cylinder 2 404 drives the V-shaped scraper 207 to reciprocate along the horizontal range of the X-axis through the connecting piece, and the rotation angle is 30°. The top of the V-shaped scraper 207 contacts the fine filter cone 808, and the fine soil adhered to the bottom of the fine filter cone 808 after the filter is pressed is scraped and cleaned off;

[0046] If the filter efficiency coefficient LSi is less than the preset filter efficiency coefficient YSi, no signal is generated.

[0047] Example 2: Please refer to Figure 1 - Figure 8 As shown, this embodiment is an automatic impurity removal device for soil heavy metal detection, including a pull-out box 102 slidably arranged in the middle of a base 1, a collection groove 103 matching with a central groove 101 is arranged on the top of the pull-out box 102, and the bottom of the cylinder 2 is covered on the outside of the central groove 101;

[0048] A sealing ring 201 is provided in a depression at the top of the cylinder 2, an air intake ring 202 is provided inside the sealing ring 201, a duct 203 connecting the air intake ring 202, the air intake grille 204 and the V-shaped scraper 207 is embedded in the cylinder wall of the cylinder 2, and the exhaust fan 705 extracts the hot air collected at the top of the cylinder 2 along the air intake ring 202 through the duct 203, and a filter screen is provided at the bottom of the air intake ring 202, and the filter screen has a mesh size of 80. The extracted hot air flows back to the air duct 703 along the duct 203, and after being heated by the heater 704 at a low consumption, it is diverted to the jet cone 701 and the V-shaped scraper 207, and the V-shaped scraper 207 is provided with a slip ring and a branch pipe connected to the exhaust fan 705;

[0049] See also Figure 3 As shown, the rotary cylinder 205 drives the V-shaped scraper 207 to reciprocate along the horizontal range of the X-axis through the connecting piece, and the rotation angle is 30°. The top of the V-shaped scraper 207 contacts the fine filter cone 808, and the fine soil adhered to the bottom of the fine filter cone 808 after the filter is pressed is scraped and cleaned off;

[0050] A rotary cylinder 205 is provided on the inner wall of the bottom of the cylinder 2, a cone ring 206 connected to a V-shaped scraper 207 is provided on the inner wall of the rotary cylinder 205, a support ring 208 connected to the V-shaped scraper 207 is provided below the cone ring 206, and a plurality of micro-holes are provided on the top surface of the V-shaped scraper 207;

[0051] See also Figure 4 As shown, a rotary cylinder 404 is arranged at one end of the fixed frame 403 close to the lower ball 401, a limit frame 405 is arranged at the end surface of the rotary cylinder 404, a servo motor 406 is fixed at the bottom of the limit frame 405, a collar 408 is arranged on the inner wall of the limit frame 405, a rotating ring 409 connecting the upper ball 402 and the lower ball 401 is arranged on the inner wall of the collar 408, a plurality of stirring paddles 407 are symmetrically arranged inside the lower ball 401 and the upper ball 402, and a servo motor 406 is fixed at the bottom of the limit frame 405, a collar 408 is arranged on the inner wall of the collar 408, a rotating ring 409 connecting the upper ball 402 and the lower ball 401 is arranged on the inner wall of the collar 408, a plurality of stirring paddles 407 are symmetrically arranged inside the lower ball 401 and the upper ball 402, and a plurality of stirring paddles 407 are arranged on the inner wall of ... The machine 406 drives the rotating ring 409 to rotate along the collar 408 through the coupling. The rotating ring 409 is connected to the edge of the lower ball 401 and the upper ball 402 and drives them to rotate clockwise or counterclockwise along the X-axis on the collar 408. The sample soil between the upper ball 402 and the lower ball 401 is pulled and contacts the stirring paddle 407. After the sample soil contacts and collides with the stirring paddle 407, it continues to explode and disperse. The finer soil falls along the mesh hole diameter of the upper ball 402 or the lower ball 401.

[0052] The rotary cylinder 404 drives the limit frame 405 to rotate clockwise or counterclockwise along the Y axis through the coupling, so that the upper ball 402 and the lower ball 401 are displaced and exchanged cyclically, and the sample soil inside the upper ball 402 and the lower ball 401 is pulled and chaotically rolled, accelerating the contact between the sample soil and the stirring paddle 407 and the mesh surface of the upper ball 402 and the lower ball 401, and the scattered fine soil falls off the ball screen mechanism 4 along the mesh hole diameter, while the larger, non-breakable impurities such as stones and roots are retained in the ball screen mechanism 4, and the mesh hole diameter is 10 meshes;

[0053] See also Figure 5 As shown, an air duct 703 connected to the air inlet grille 204 is arranged inside the air guide frame 7, a heater 704 is arranged inside the air duct 703, a jet cone 701 is arranged in the middle of the air guide frame 7, an exhaust fan 705 is arranged inside the jet cone 701, and a support sleeve 702 connected to the jet cone 701 is arranged at the bottom of the exhaust fan 705. The exhaust fan 705 draws external air along the air inlet grille 204 through the air duct 703, and an air filter is arranged inside the air inlet grille 204, which filters the external air passing through. When the external air flows along the inside of the air duct 703, the heater 704 heats it to obtain pure hot air, and the pure hot air is ejected along the surface of the jet cone 701. The surface of the jet cone 701 is provided with multiple groups of fine holes. The pure hot air is blown directly toward the ball screen mechanism 4 along the jet cone 701, and the mesh surface, stirring paddle 407 and other metal parts on the ball screen mechanism 4 are continuously heated, so that the sample soil inside the ball screen mechanism 4 is continuously heated and dried, so that it is easier to be crushed;

[0054] The pure hot air blows upward through the finely crushed soil falling from the bottom of the ball screen mechanism 4, and the finely crushed soil is thrown around along the bottom of the ball screen mechanism 4 through the continuous rotation interference of the ball screen mechanism 4, and slides along the inner wall of the cylinder 2 to the filter press ring 8;

[0055] See also Figure 7 , Figure 8 As shown, a fine filter cone net 808 is arranged at the bottom of the filter press ring 8, and the filter press cone 801 is arranged at the top of the fine filter cone net 808. The top of the filter press ring 8 is designed with an inclined surface, so that the finely crushed soil received can slide along its surface to between the fine filter cone net 808 and the filter press cone 801 after falling. The lifting cylinder 802 drives the filter press cone 801 to slide down intermittently through the connecting piece, and the servo motor 406 drives the filter press cone 801 to rotate and slide down through the connecting piece and the lifting cylinder 802 until the wear-resistant soft sleeve 804 contacts the surface of the fine filter cone net 808, so that the squeezed finely crushed soil is further squeezed out along the mesh of the fine filter cone net 808, so that the finely crushed soil is further crushed, which is used to screen out impurities in the finely crushed soil. The mesh of the fine filter cone net 808 is 40 meshes, and a wear-resistant soft sleeve 804 is arranged on the outer wall of the bottom of the filter press cone 801. A lifting cylinder 802 is arranged at the center of the filter press cone 801.

[0056] A plurality of groups of reinforcing ribs 806 arranged in an annular pattern are arranged on the top of the ring frame 803, a rotating motor 805 is arranged at the center of the top of the reinforcing rib 806, and the housing of the rotating motor 805 is connected to the fine filter cone net 808 and the lifting cylinder 802, a slag discharge valve 807 connected to the bottom of the fine filter cone net 808 is arranged on the side of the top of the reinforcing rib 806, and a rotary cylinder 3 connected to the reinforcing rib 806 is arranged at the bottom of the slag discharge valve 807;

[0057] The fallen fine soil falls into the central groove 101 along the gap between the reinforcing ribs 806, and passes through the central groove 101 into the aggregate trough 103. After the aggregate is collected, the pull-out box 102 is dragged by external force to pour the fine soil in the aggregate box into a professional container for testing;

[0058] When a single impurity removal is completed and the finely crushed soil is taken out, the rotary cylinder drives the slag discharge valve 807 to turn outward through the three-way connecting piece, causing the bottom of the fine filter cone net 808 to open to form a hole, making it easier for the rotary motor 805 and the lifting cylinder 802 to further drive the filter press cone 801 to slide down and rotate, so that the impurities intercepted at the top of the fine filter cone net 808 are continuously discharged.

[0059] In combination with Example 1 and Example 2, the sample soil can be subjected to a multi-angle rotary stirring preliminary impurity removal, and with the assistance of a pure hot air flow, the sample soil can be continuously heated and dehydrated, thereby accelerating the rapid crushing and granulation of the sample soil during the rotary stirring process, which is helpful for separating impurities from the soil. The filter press ring 8 can also be used to further perform a filter press extrusion treatment on the finely crushed soil after the initial screening, thereby achieving grinding-type extrusion impurity removal of the sample soil, further improving the purity of the sample soil, and reducing the interference of impurities on detection.

[0060] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic impurity removal device for soil heavy metal detection, comprising a base (1), a center groove (101) being arranged at the center of the top of the base (1), and a cylinder (2) covering the center groove (101) being arranged at the top of the base (1), characterized in that: A V-shaped scraper (207) is provided on the inner wall at the bottom of the cylinder (2), an air intake grille (204) is provided on the middle wall of the cylinder (2), a ball screen mechanism (4) is provided on the inner wall at the top of the cylinder (2), a top cover (3) is hingedly connected to the top of the cylinder (2), and a control panel (5) is provided on the top of the top cover (3); The ball screen mechanism (4) comprises a plurality of groups of fixed frames (403), upper balls (402) and lower balls (401) are arranged between the plurality of groups of fixed frames (403), a servo motor (406) is arranged at the bottom of the end surface of the fixed frame (403), an air guide frame (7) is arranged below the lower ball (401), a filter press ring (8) is arranged below the air guide frame (7), a filter press cone (801) is arranged at the top of the filter press ring (8), and a ring frame (803) is arranged below the filter press ring (8); A sealing ring (201) is provided in a recessed manner at the top of the cylinder (2), an air intake ring (202) is provided inside the sealing ring (201), and a conduit (203) connecting the air intake ring (202), the air intake grille (204) and the V-shaped scraper (207) is embedded in the cylinder wall of the cylinder (2); A rotary cylinder (205) is provided on the inner wall of the bottom of the cylinder (2), a cone ring (206) connected to a V-shaped scraper (207) is provided on the inner wall of the rotary cylinder (205), a support ring (208) connected to the V-shaped scraper (207) is provided below the cone ring (206), and a top surface of the V-shaped scraper (207) is provided with a plurality of groups of micro-holes; A second rotary cylinder (404) is disposed at one end of the fixed frame (403) close to the lower ball (401); a limit frame (405) is disposed on the end surface of the second rotary cylinder (404); the servo motor (406) is fixed to the bottom of the limit frame (405); a collar (408) is disposed on the inner wall of the limit frame (405); a rotating ring (409) connecting the upper ball (402) and the lower ball (401) is disposed on the inner wall of the collar (408); and a plurality of groups of stirring paddles (407) are symmetrically disposed inside the lower ball (401) and the upper ball (402); An air duct (703) connected to an air intake grille (204) is arranged inside the air guide frame (7), a heater (704) is arranged inside the air duct (703), an air jet cone (701) is arranged in the middle of the air guide frame (7), an exhaust fan (705) is arranged inside the air jet cone (701), and a support sleeve (702) connected to the air jet cone (701) is arranged at the bottom of the exhaust fan (705).

2. The automatic impurity removal device for soil heavy metal detection according to claim 1 is characterized in that: A drawer box (102) is slidably arranged in the middle of the base (1), a material collecting groove (103) cooperating with the central groove (101) is arranged on the top of the drawer box (102), and the bottom of the cylinder (2) is covered on the outside of the central groove (101).

3. The automatic impurity removal device for soil heavy metal detection according to claim 1, characterized in that: A fine filter cone net (808) is arranged at the bottom of the filter press ring (8), the filter press cone (801) is arranged on the top of the fine filter cone net (808), a wear-resistant soft sleeve (804) is arranged on the outer wall of the bottom of the filter press cone (801), and a lifting cylinder (802) is arranged at the center of the filter press cone (801).

4. The automatic impurity removal device for soil heavy metal detection according to claim 3 is characterized in that: A plurality of groups of reinforcing ribs (806) arranged in an annular pattern are provided on the top of the ring frame (803); a rotating motor (805) is provided at the center of the top of the reinforcing rib (806); and the housing of the rotating motor (805) is connected to the fine filter cone net (808) and the lifting cylinder (802); a slag discharge valve (807) connected to the bottom of the fine filter cone net (808) is provided on the side of the top of the reinforcing rib (806); and a rotary cylinder three connected to the reinforcing rib (806) is provided at the bottom of the slag discharge valve (807).

5. The automatic impurity removal device for soil heavy metal detection according to claim 1, characterized in that: The control panel (5) is internally provided with a processor, a data acquisition module, a self-checking analysis module and a signal execution module; The data acquisition module is used to collect the soil and debris ratio fluctuation value TZz located inside the ball screen mechanism (4) and the fine soil falling flow rate XTz located through the central groove (101) of the impurity removal device during use, and send the soil and debris ratio fluctuation value TZz and the fine soil falling flow rate XTz to the self-checking analysis module via the processor; After receiving the soil and debris ratio fluctuation value TZz and the fine soil fall flow rate XTz, the self-check analysis module immediately analyzes the filter screening efficiency of the impurity removal device. The specific analysis process is as follows: the soil and debris ratio fluctuation value TZz and the fine soil fall flow rate XTz within the time threshold are obtained, and the filter screening efficiency coefficient LSi is obtained through formula analysis, and the preset filter screening efficiency coefficient YSi stored and entered is retrieved from the processor for comparison and analysis with the filter screening efficiency coefficient LSi; if the filter screening efficiency coefficient LSi ≥ the preset filter screening efficiency coefficient YSi, it is determined that the filter screening of the impurity removal device within the time threshold is abnormal, and a control signal is generated, and the generated signal is sent to the signal execution module through the processor; After receiving the control signal, the signal execution module immediately controls the servo motor (406) to work; If the filter efficiency coefficient LSi is less than the preset filter efficiency coefficient YSi, no signal is generated.

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