A device and method for preparing test solution for soil atrazine detection

Abstract

The invention discloses a preparation device and method for a test liquid for detecting atrazine in soil, belonging to the technical field of preparation devices. Mixed liquids of the same proportion but different amounts are taken out manually using a measuring cylinder, and then are respectively tested. This material taking method has low efficiency, and residual soil in the mixed liquid will adhere to part of the liquid, resulting in inaccurate detection accuracy. The device comprises a bottom plate, a second motor drives a plurality of stirring rods to rotate, centrifugally stirs the soil mixed liquid, a first motor drives a mesh plate to move downward along the inner wall of a filter press box through a screw rod, cooperates with a lower mesh plate to squeeze, and filters the soil mixed liquid in the filter press box; three tooth grooves respectively rotate three power teeth, so that the first gear drives a ball valve to rotate, and an L-shaped connecting pipe is opened and closed. Because the lengths of three convex sliding bars are set differently, the three ball valves are opened at different times, so that the amounts of the mixed liquid of the same proportion falling from the L-shaped connecting pipe to the measuring cylinder are different.

Description

Technical Field

[0001] The invention relates to the technical field of preparation devices, and in particular to a device and method for preparing a test liquid for detecting atrazine in soil. Background Art

[0002] When detecting the atrazine concentration in the soil, atrazine is usually extracted using organic solvents such as ethyl acetate. There are problems of emulsification, toxicity, flammability and environmental pollution during the operation, and the extract contains a variety of interfering co-extracts, which affect the chromatographic analysis. By mixing the soil and water and separating them, the production of various non-polar co-extracts can be reduced, and the explanation and conversion of atrazine can be prevented to the greatest extent. However, the mixed solution is often quantitatively taken manually using a measuring cylinder during the extraction process. It is necessary to take out the same proportion but different amounts of the mixed solution separately, and then test them separately to finally obtain the atrazine concentration value. This method of taking materials is inefficient, and after stirring and separating, the residual soil in the mixed solution will adhere to part of the liquid, resulting in inaccurate detection accuracy. For this reason, we propose a method for preparing a test solution for soil atrazine detection to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a device and method for preparing a test solution for detecting atrazine in soil, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a device for preparing a test liquid for detecting atrazine in soil, comprising a base plate, a driving device, a filter press box and a material receiving assembly are fixedly installed on the upper surface of the base plate, the driving device is meshedly connected with a linkage assembly, the bottom end of the linkage assembly is fixedly arranged on the upper surface of the base plate, the driving device is rotatably connected to the filter press box, a mixing box is fixedly connected to the upper surface of the filter press box, a centrifugal device is fixedly installed on the upper end of the mixing box, a feeding assembly is fixedly sleeved on the filter press box, the feeding assembly is meshedly connected with the linkage assembly, a guide assembly is fixedly arranged on the side of the material receiving assembly, and the guide assembly is slidably connected to the linkage assembly.

[0005] As a preferred technical solution of the present invention, a ventilation valve is fixedly sleeved at the upper end of the filter press box, two rectangular material guide pipes are fixedly sleeved on the outer surface of the filter press box, a first sealing plate is installed on the inner thread of the rectangular material guide pipe, the upper end of the rectangular material guide pipe is fixedly sleeved with a mixing box, and a sewage cleaning port is provided at the bottom end of the filter press box.

[0006] As a preferred technical solution of the present invention, a sealing cover is fixedly provided on the upper end of the mixing box, a centrifugal device is fixedly installed on the upper surface of the sealing cover, two L-shaped material guide tubes are fixedly provided on the outer surface of the bottom end of the mixing box, a second sealing plate is installed on the inner thread of the L-shaped material guide tube, and the bottom end of the L-shaped material guide tube is fixedly connected to a rectangular material guide tube.

[0007] As a preferred technical solution of the present invention, the centrifugal device includes a second motor, the bottom end of the second motor is fixedly arranged on the upper surface of the cover, the output end of the second motor movably penetrates the cover and is fixedly connected to a plurality of stirring rods.

[0008] As a preferred technical solution of the present invention, the driving device includes a first motor, the bottom end of the first motor is fixedly arranged on the upper surface of the bottom plate, the output end of the first motor is fixedly provided with an active bevel gear, the active bevel gear is meshed and connected with a linkage component, the output end of the first motor is fixedly connected with a screw rod, the screw rod is rotatably engaged with the inner wall of the filter press box, the outer rotation of the screw rod is connected with a lower mesh plate, the outer thread of the screw rod penetrates the mesh plate, the upper surface of the lower mesh plate and the bottom surface of the mesh plate are fixedly provided with filter plates, the lower mesh plate is arranged at the bottom end of the filter press box, and the mesh plate is arranged at the upper end of the filter press box.

[0009] As a preferred technical solution of the present invention, the feed assembly includes a liquid outlet pipe, the liquid outlet pipe is fixedly connected to the filter press box, one end of the liquid outlet pipe is fixedly connected to a tee, the tee is fixedly connected to three L-shaped connecting pipes, a spherical filter, an annular plug and a base are fixedly installed in the liquid outlet pipe, a spring seat is fixedly provided on the side of the base, one end of the spring seat is fixedly provided with a conical plug, the outer surface of the conical plug is fit-connected to the annular plug, the bottom end of the L-shaped connecting pipe is fit-connected to the guide assembly, a ball valve is rotatably installed in the bottom end of the L-shaped connecting pipe, a first gear is fixedly provided on the ball valve, and the first gear is meshingly connected to the linkage assembly.

[0010] As a preferred technical solution of the present invention, the guide assembly includes a fixed plate, three through grooves are opened on the fixed plate, the inner walls of the through grooves are fitted and connected to the outer surface of the bottom end of the L-shaped connecting tube, three guide rails are fixedly provided on the upper surface of the fixed plate, the guide rails are slidably connected to the linkage assembly, the bottom end of the fixed plate is fixedly connected to the L-shaped plate, and the bottom end of the L-shaped plate is fixedly connected to the material receiving assembly.

[0011] As a preferred technical solution of the present invention, the material receiving assembly includes a mold box, the side of the mold box is fixedly connected to an L-shaped plate, the upper surface of the mold box is provided with three circular grooves, a measuring cylinder is movably placed in the circular groove, and the upper port of the measuring cylinder is arranged at the bottom end of the through groove.

[0012] The transmission gear of the present invention is a gear which is engaged with the gear of the driving member and is engaged with the gear of the driving member.

[0013] A method for preparing a test solution for detecting atrazine in soil comprises the following steps:

[0014] Step 1: Take a soil sample, remove impurities, add water and mix it into a mixing box. The soil mixture in the mixing box is driven by a second motor to rotate a plurality of stirring rods, and the soil mixture is centrifugally stirred. The first sealing plate and the second sealing plate are opened to allow the mixture in the mixing box to flow into the filter press box. Then the first sealing plate and the second sealing plate are closed. The first motor drives the screw rod to rotate, so that the upper screen moves downward along the inner wall of the filter press box, and cooperates with the lower screen to squeeze the soil in the mixture. The pressure in the filter press box overcomes the spring seat and causes the conical plug to separate from the annular plug seat, so that the liquid can flow out from the base.

[0015] Step 2: The first motor rotates through the active bevel gear linkage driven bevel gear, so that the rotating column drives the L-shaped push rod to slide back and forth along the rectangular slide groove, and the three convex slide bars slide along the guide rail, and respectively rotate the three power teeth through the tooth grooves, and then the first gear drives the ball valve to rotate to realize the opening and closing of the L-shaped connecting pipe. When the end face of the flat tooth fits the upper surface of the connecting convex slide bar, it can limit the power tooth from continuing to rotate due to inertia. Because the lengths of the three convex slide bars are set differently, the three ball valves are opened at different times, and the amount of the liquid flowing through the L-shaped connecting pipe and the same proportion of the mixed liquid falling from the through groove to the measuring cylinder is different.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The second motor drives multiple stirring rods to rotate and centrifugally stir the soil mixture. The first motor uses a screw rod to move the upper screen plate downward along the inner wall of the filter press box, and cooperates with the lower screen plate to squeeze and filter the soil mixture in the filter press box;

[0018] 2. The three tooth grooves respectively rotate the three power teeth, so that the first gear drives the ball valve to rotate, and the L-shaped connecting pipe is opened and closed. Because the lengths of the three convex slide bars are set differently, the three ball valves are opened at different times, so that the amount of the same proportion of mixed liquid falling from the L-shaped connecting pipe to the measuring cylinder is different. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the structural mixing box of the present invention.

[0021] Figure 3 It is a schematic diagram of the structural drive device and filter press box of the present invention.

[0022] Figure 4 This is a schematic diagram of the structural material feeding component of the present invention.

[0023] Figure 5 The structure of the present invention Figure 4 The enlarged schematic diagram of point B in the middle,

[0024] Figure 6 This is a schematic diagram of the structural linkage components of the present invention.

[0025] Figure 7 It is a schematic diagram of the structural guide assembly of the present invention.

[0026] In the figure: 1, bottom plate; 2, driving device; 21, first motor; 22, driving bevel gear; 23, lower screen plate; 24, upper screen plate; 25, filter plate; 26, screw rod; 3, filter press box; 31, rectangular material guide pipe; 32, first sealing plate; 33, ventilation valve; 34, sewage cleaning port; 4, mixing box; 41, L-shaped material guide pipe; 42, sealing cover; 43, second sealing plate; 5, centrifugal device; 51, second motor; 52, stirring rod; 6, material feeding assembly; 61, liquid outlet pipe; 62, three-way; 621, L-shaped connecting pipe; 63, ball valve; 64, first gear; 6 5. Spherical filter; 66. Annular plug seat; 67. Conical plug; 68. Spring seat; 69. Base; 7. Guide assembly; 71. Fixed plate; 72. Through groove; 73. Guide rail; 74. L-shaped plate; 8. Linkage assembly; 81. Driven bevel gear; 811. Transmission shaft; 82. Rectangular frame; 821. Rectangular slide groove; 83. Rotating column; 831. Convolution groove; 84. L-shaped push rod; 85. Cross bar; 86. Convex slide bar; 861. Tooth groove; 87. Power tooth; 871. Flat tooth; 9. Material receiving assembly; 91. Mold box; 92. Round groove; 93. Measuring cylinder. DETAILED DESCRIPTION

[0027] 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.

[0028] Example: Figure 1-7 As shown, the present invention provides a preparation device for a test liquid for detecting atrazine in soil, comprising a bottom plate 1, a driving device 2, a filter press box 3 and a material receiving component 9 are fixedly installed on the upper surface of the bottom plate 1, the driving device 2 causes the soil mixed liquid in the filter press box 3 to be filtered, the driving device 2 is meshedly connected with a linkage component 8, the bottom end of the linkage component 8 is fixedly arranged on the upper surface of the bottom plate 1, the driving device 2 is rotatably connected to the filter press box 3, the upper surface of the filter press box 3 is fixedly connected with a mixing box 4, the upper end of the mixing box 4 is fixedly installed with a centrifugal device 5, the filter press box 3 is fixedly sleeved with a feeding component 6, the feeding component 6 is meshedly connected with the linkage component 8, a guide component 7 is fixedly provided on the side of the material receiving component 9, the guide component 7 is slidably connected with the linkage component 8, the driving device 2 drives the soil mixed liquid in the filter press box 3 to be filtered, and at the same time the linkage component 8 is operated, so that the material receiving component 9 can receive different amounts of mixed liquids of the same proportion from the feeding component 6.

[0029] Furthermore, a ventilation valve 33 is fixedly sleeved at the upper end of the filter press box 3, and a one-way valve is arranged in the ventilation valve 33. Two rectangular material guide pipes 31 are fixedly sleeved on the outer surface of the filter press box 3. A first sealing plate 32 is installed on the inner thread of the rectangular material guide pipe 31. The rectangular material guide pipe 31 and the interior of the filter press box 3 are sealed and isolated by the first sealing plate 32. The upper end of the rectangular material guide pipe 31 is fixedly sleeved with a mixing box 4. The bottom end of the filter press box 3 is provided with a sewage cleaning port 34 for sewage discharge.

[0030] Furthermore, a sealing cover 42 is fixedly provided on the upper end of the mixing box 4, and a centrifugal device 5 is fixedly installed on the upper surface of the sealing cover 42. Two L-shaped material guide tubes 41 are fixedly provided on the outer surface of the bottom end of the mixing box 4. A second sealing plate 43 is installed on the inner thread of the L-shaped material guide tube 41. The L-shaped material guide tube 41 and the interior of the mixing box 4 are sealed and isolated by the second sealing plate 43. The bottom end of the L-shaped material guide tube 41 is fixedly connected to the rectangular material guide tube 31.

[0031] Furthermore, the centrifugal device 5 includes a second motor 51, the bottom end of which is fixedly arranged on the upper surface of the cover 42, the output end of the second motor 51 movably penetrates the cover 42, and is fixedly connected with a plurality of stirring rods 52, so that the second motor 51 drives the plurality of stirring rods 52 to rotate, thereby centrifugally stirring the soil mixture.

[0032] Further, the driving device 2 includes a first motor 21, the bottom end of the first motor 21 is fixedly arranged on the upper surface of the bottom plate 1, the output end of the first motor 21 is fixedly provided with an active bevel gear 22, the active bevel gear 22 is meshed and connected to the linkage assembly 8, the first motor 21 drives the linkage assembly 8 to work through the active bevel gear 22, the output end of the first motor 21 is fixedly connected with a screw rod 26, the screw rod 26 is rotationally engaged with the inner wall of the filter press box 3, the screw rod 26 is externally rotationally connected with a lower mesh plate 23, the screw rod 26 is externally threaded with an upper mesh plate 24, the upper surface of the lower mesh plate 23 and the bottom surface of the upper mesh plate 24 are fixedly provided with filter plates 25 for filtering, the lower mesh plate 23 is arranged at the bottom end of the filter press box 3, and the upper mesh plate 24 is arranged at the upper end of the filter press box 3, so that the first motor 21 drives the screw rod 26 to rotate, so that the upper mesh plate 24 moves downward along the inner wall of the filter press box 3, so that the soil in the mixed liquid can be squeezed in cooperation with the lower mesh plate 23.

[0033] Furthermore, the feeding assembly 6 includes a liquid outlet pipe 61, the liquid outlet pipe 61 is fixedly sleeved with the filter press box 3, and the liquid in the filter press box 3 flows out through the liquid outlet pipe 61, one end of the liquid outlet pipe 61 is fixedly connected with a tee 62, and the tee 62 is fixedly sleeved with three L-shaped connecting pipes 621, and a spherical filter 65, an annular plug seat 66 and a base 69 are fixedly installed in the liquid outlet pipe 61, and the spherical filter 65 further filters, and a spring seat 68 is fixedly provided on the side of the base 69, and a conical plug 67 is fixedly provided at one end of the spring seat 68, and the The outer surface of the conical plug 67 is fitted and connected to the annular plug seat 66, so that when the upper screen plate 24 moves downward along the inner wall of the filter press box 3, the pressure in the filter press box 3 overcomes the spring seat 68 and causes the conical plug 67 to separate from the annular plug seat 66, so that the liquid can flow out from the base 69. The bottom end of the L-shaped connecting pipe 621 is fitted and connected to the guide assembly 7, and a ball valve 63 is rotatably installed in the bottom end of the L-shaped connecting pipe 621. A first gear 64 is fixed on the ball valve 63. The first gear 64 opens and closes the ball valve 63, and the first gear 64 is meshed and connected to the linkage assembly 8.

[0034] Furthermore, the guide assembly 7 includes a fixed plate 71, which has three through grooves 72. The inner walls of the through grooves 72 are fitted to the outer surface of the bottom end of the L-shaped connecting tube 621. Three guide rails 73 are fixedly provided on the upper surface of the fixed plate 71. The guide rails 73 are slidably connected to the linkage assembly 8. The bottom end of the fixed plate 71 is fixedly connected to an L-shaped plate 74, and the bottom end of the L-shaped plate 74 is fixedly connected to the material receiving assembly 9, so that the liquid in the L-shaped connecting tube 621 falls through the through grooves 72.

[0035] Furthermore, the material receiving assembly 9 includes a mold box 91, the side of the mold box 91 is fixedly connected to the L-shaped plate 74, and the upper surface of the mold box 91 is provided with three circular grooves 92, and a measuring cylinder 93 is movably placed in the circular groove 92. The upper port of the measuring cylinder 93 is arranged at the bottom end of the through groove 72, so that the three measuring cylinders 93 can respectively receive the detection liquid.

[0036] Further, the linkage assembly 8 includes a driven bevel gear 81, which is meshed and connected with the active bevel gear 22, and the active bevel gear 22 drives the driven bevel gear 81 to rotate, and the driven bevel gear 81 is fixed with a transmission shaft 811, and the transmission shaft 811 is rotatably installed at the bottom end of the filter press box 3, and one end of the transmission shaft 811 is fixedly connected with a rotating column 83, and the transmission shaft 811 drives the rotating column 83 to rotate, and a rotating groove 831 is provided on the outer surface of the rotating column 83, and a rectangular frame 82 is rotatably connected to both ends of the rotating column 83, and the bottom surface of the rectangular frame 82 is fixedly provided on the upper surface of the bottom plate 1, and a rectangular slide groove 821 is provided on the upper surface of the rectangular frame 82, and an L-shaped push rod 84 is slidably connected in the rectangular slide groove 821 and the rotating groove 831, and the L-shaped push rod 84 is moved along the rectangular slide groove 821 through the rotating groove 831. Back sliding, one end of the L-shaped push rod 84 is fixedly connected to a cross bar 85, and three convex slide bars 86 are fixedly connected to the side of the cross bar 85. The three convex slide bars 86 have different lengths, and the lengths of the three convex slide bars 86 are set differently. A tooth groove 861 is opened on the upper surface of the convex slide bar 86, and the tooth groove 861 is meshed and connected with a power tooth 87. The power tooth 87 is fixedly connected to the first gear 64, so that the three tooth grooves 861 respectively rotate the three power teeth 87, and respectively make the first gear 64 drive the ball valve 63 to rotate, and then realize the opening and closing of the L-shaped connecting pipe 621. Two flat teeth 871 are fixedly provided on the power tooth 87, and the end face of the flat tooth 871 is in contact with the upper surface of the convex slide bar 86. When the end face of the flat tooth 871 is in contact with the upper surface of the convex slide bar 86, it can limit the power tooth 87 from continuing to rotate due to inertia.

[0037] A method for preparing a test solution for detecting atrazine in soil comprises the following steps:

[0038] Step 1: Take a soil sample, remove impurities, add water and mix it into the mixing box 4. The soil mixture in the mixing box 4 is driven by the second motor 51 to rotate multiple stirring rods 52, and the soil mixture is centrifugally stirred. The first sealing plate 32 and the second sealing plate 43 are opened to allow the mixed liquid in the mixing box 4 to flow into the filter press box 3, and then the first sealing plate 32 and the second sealing plate 43 are closed. The first motor 21 drives the screw rod 26 to rotate, so that the upper mesh plate 24 moves downward along the inner wall of the filter press box 3, and cooperates with the lower mesh plate 23 to squeeze the soil in the mixed liquid. The pressure in the filter press box 3 overcomes the spring seat 68, and the conical plug 67 is separated from the annular plug seat 66, so that the liquid can flow out from the base 69;

[0039] Step 2: The first motor 21 rotates through the active bevel gear 22 to link the driven bevel gear 81, so that the rotating column 83 drives the L-shaped push rod 84 to slide back and forth along the rectangular slide groove 821, and the three convex slide bars 86 slide along the guide rail 73, and respectively rotate the three power teeth 87 through the tooth grooves 861, and then the first gear 64 drives the ball valve 63 to rotate to realize the opening and closing of the L-shaped connecting pipe 621. When the end face of the flat tooth 871 is in contact with the upper surface of the convex slide bar 86, the power tooth 87 can be restricted from continuing to rotate due to inertia. Because the lengths of the three convex slide bars 86 are set differently, the three ball valves 63 are opened at different times, and the amount of the liquid flowing through the L-shaped connecting pipe 621 and the same proportion of the mixed liquid falling from the through groove 72 to the measuring cylinder 93 is different.

[0040] Working principle: Take soil samples, remove impurities, add water and mix them into the mixing box 4. The soil mixture filled in the mixing box 4 is driven by the second motor 51 to rotate multiple stirring rods 52, and the soil mixture is centrifuged and stirred. The rectangular guide tube 31 and the inside of the filter press box 3 are sealed and isolated by the first sealing plate 32, and the L-shaped guide tube 41 and the inside of the mixing box 4 are sealed and isolated by the second sealing plate 43. After the centrifugation is completed, the first sealing plate 32 and the second sealing plate 43 are opened to allow the mixed liquid in the mixing box 4 to flow into the filter press box 3, and then the first sealing plate 32 and the second sealing plate 43 are closed. The first motor 21 drives the screw rod 26 to rotate, so that the upper mesh plate 24 moves downward along the inner wall of the filter press box 3, so that the lower mesh plate 23 can squeeze the soil in the mixed liquid. At the same time, the pressure in the filter press box 3 overcomes the spring seat 68 and disengages the conical plug 67. The first motor 21 rotates the driven bevel gear 81 through the active bevel gear 22, so that the rotating column 83 passes through the swivel groove 831 to make the L-shaped push rod 84 slide back and forth along the rectangular slide groove 821, so that the three convex slide bars 86 slide along the guide rail 73, and the three tooth grooves 861 respectively rotate the three power teeth 87, and respectively make the first gear 64 drive the ball valve 63 to rotate, and then realize the opening and closing of the L-shaped connecting pipe 621. When the end face of the flat tooth 871 is in contact with the upper surface of the convex slide bar 86, the power tooth 87 can be restricted from continuing to rotate due to inertia. Because the lengths of the three convex slide bars 86 are set differently, the three ball valves 63 are opened at different times, so that the liquid flowing through the L-shaped connecting pipe 621 and the amount of the same proportion of the mixed liquid falling from the through groove 72 to the measuring cylinder 93 are different.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preparing a test solution for detecting atrazine in soil, comprising a bottom plate (1), characterized in that: The upper surface of the bottom plate (1) is fixedly mounted with a driving device (2), a filter press box (3) and a material receiving assembly (9); the driving device (2) is meshedly connected with a linkage assembly (8); the bottom end of the linkage assembly (8) is fixedly arranged on the upper surface of the bottom plate (1); the driving device (2) is rotatably connected to the filter press box (3); the upper surface of the filter press box (3) is fixedly connected with a mixing box (4); the upper end of the mixing box (4) is fixedly mounted with a centrifugal device (5); the filter press box (3) is fixedly sleeved with a material feeding assembly (6); the material feeding assembly (6) is meshedly connected with the linkage assembly (8); the material receiving assembly (9) A guide assembly (7) is fixedly provided on the side, and the guide assembly (7) is slidably connected to the linkage assembly (8); wherein the material delivery assembly (6) comprises a liquid outlet pipe (61), the liquid outlet pipe (61) is fixedly sleeved on the filter press box (3), one end of the liquid outlet pipe (61) is fixedly connected to a tee (62), the tee (62) is fixedly sleeved with three L-shaped connecting pipes (621), a spherical filter screen (65), an annular plugging seat (66) and a base (69) are fixedly installed in the liquid outlet pipe (61), a spring seat (68) is fixedly provided on the side of the base (69), and one end of the spring seat (68) is fixedly sleeved on the filter press box (3), and one end of the spring seat (68) is fixedly sleeved on the filter press box (3). A conical plug (67) is fixedly provided, the outer surface of the conical plug (67) is fitted and connected to the annular plug seat (66), the bottom end of the L-shaped connecting tube (621) is fitted and connected to the guide component (7), the guide component (7) comprises a fixing plate (71), three through grooves (72) are opened on the fixing plate (71), the inner wall of the through groove (72) is fitted and connected to the outer surface of the bottom end of the L-shaped connecting tube (621), three guide rails (73) are fixedly provided on the upper surface of the fixing plate (71), the guide rails (73) are slidably connected to the linkage component (8), and the bottom end of the fixing plate (71) is fixedly connected to the L-shaped plate (71). 4), the bottom end of the L-shaped plate (74) is fixedly connected to a material receiving assembly (9); the material receiving assembly (9) comprises a mold box (91), the side of the mold box (91) is fixedly connected to the L-shaped plate (74), the upper surface of the mold box (91) is provided with three circular grooves (92), a measuring cylinder (93) is movably placed in the circular groove (92), the upper end of the measuring cylinder (93) is arranged at the bottom end of the through groove (72), a ball valve (63) is rotatably installed in the bottom end of the L-shaped connecting pipe (621), a first gear (64) is fixedly provided on the ball valve (63), and the first gear (64) is meshingly connected to the linkage assembly (8);The linkage assembly (8) comprises a driven bevel gear (81), the driven bevel gear (81) being meshedly connected to the driving bevel gear (22), the driven bevel gear (81) being fixedly provided with a transmission shaft (811), the transmission shaft (811) being rotatably mounted on the bottom end of the filter press box (3), one end of the transmission shaft (811) being fixedly connected to a rotating column (83), the outer surface of the rotating column (83) being provided with a gyratory groove (831), the two ends of the rotating column (83) being rotatably connected to a rectangular frame (82), the bottom surface of the rectangular frame (82) being fixedly provided on the upper surface of the bottom plate (1), the upper surface of the rectangular frame (82) being provided with a A rectangular slide groove (821) is provided, an L-shaped push rod (84) is slidably connected in the rectangular slide groove (821) and the swing groove (831), one end of the L-shaped push rod (84) is fixedly connected to a cross bar (85), three convex slide bars (86) are fixedly connected to the side of the cross bar (85), the three convex slide bars (86) have different lengths, a tooth groove (861) is provided on the upper surface of the convex slide bar (86), the tooth groove (861) is meshedly connected with a power tooth (87), the power tooth (87) is fixedly connected to the first gear (64), and two flat teeth (871) are fixedly provided on the power tooth (87). ; 2. A device for preparing a test solution for detecting atrazine in soil according to claim 1, characterized in that: A ventilation valve (33) is fixedly sleeved at the upper end of the filter press box (3); two rectangular material guide pipes (31) are fixedly sleeved on the outer surface of the filter press box (3); a first sealing plate (32) is installed on the inner thread of the rectangular material guide pipe (31); the upper end of the rectangular material guide pipe (31) is fixedly sleeved on the mixing box (4); and a sewage cleaning port (34) is provided at the bottom end of the filter press box (3).

3. A device for preparing a test solution for detecting atrazine in soil according to claim 2, characterized in that: A sealing cover (42) is fixedly provided at the upper end of the mixing box (4), a centrifugal device (5) is fixedly installed on the upper surface of the sealing cover (42), two L-shaped material guide tubes (41) are fixedly provided on the outer surface of the bottom end of the mixing box (4), a second sealing plate (43) is installed on the inner thread of the L-shaped material guide tube (41), and the bottom end of the L-shaped material guide tube (41) is fixedly sleeved with the rectangular material guide tube (31).

4. A device for preparing a test solution for detecting atrazine in soil as claimed in claim 3, characterized in that: The centrifugal device (5) comprises a second motor (51), the bottom end of the second motor (51) being fixedly arranged on the upper surface of the cover (42), the output end of the second motor (51) movably passing through the cover (42) and being fixedly connected to a plurality of stirring rods (52).

5. A device for preparing a test solution for detecting atrazine in soil according to claim 4, characterized in that: The driving device (2) comprises a first motor (21), the bottom end of the first motor (21) being fixedly arranged on the upper surface of the bottom plate (1), the output end of the first motor (21) being fixedly arranged with an active bevel gear (22), the active bevel gear (22) being meshingly connected to a linkage assembly (8), the output end of the first motor (21) being fixedly connected with a screw rod (26), the screw rod (26) being rotatably engaged with the inner wall of the filter press box (3), the screw rod (26) being externally rotatably connected with a lower mesh plate (23), the screw rod (26) having an external thread penetrating the mesh plate (24), the upper surface of the lower mesh plate (23) and the bottom surface of the mesh plate (24) being fixedly arranged with filter plates (25), the lower mesh plate (23) being arranged at the bottom end of the filter press box (3), and the mesh plate (24) being arranged at the upper end of the filter press box (3).

6. A method for preparing a test solution for detecting atrazine in soil, characterized in that: The preparation is carried out using the device for preparing the test solution for detecting atrazine in soil as claimed in claim 5, comprising the following steps: Step 1: Take a soil sample, remove impurities, add water and mix, and add the mixture into a mixing box (4) to obtain a soil mixture. The second motor (51) drives a plurality of stirring rods (52) to rotate, and the soil mixture is centrifugally stirred. The first sealing plate (32) and the second sealing plate (43) are opened to allow the mixture in the mixing box (4) to flow into the filter press box (3). The first sealing plate (32) and the second sealing plate (43) are then closed. The first motor (21) drives the screw rod (26) to rotate, so that the upper mesh plate (24) moves downward along the inner wall of the filter press box (3) and cooperates with the lower mesh plate (23) to squeeze the soil in the mixture. The pressure in the filter press box (3) overcomes the spring seat (68) and causes the conical plug (67) to separate from the annular plug seat (66), so that the liquid can flow out from the base (69); Step 2: The first motor (21) rotates the driven bevel gear (81) through the active bevel gear (22), so that the rotating column (83) drives the L-shaped push rod (84) to slide back and forth along the rectangular slide groove (821), and the three convex slide bars (86) slide along the guide rail (73) and respectively rotate the three power teeth (87) through the tooth grooves (861). Then, the first gear (64) drives the ball valve (63) to rotate, so as to realize the opening and closing of the L-shaped connecting pipe (621). When the end surface of the flat tooth (871) is in contact with the upper surface of the convex slide bar (86), the power tooth (87) can be restricted from continuing to rotate due to inertia. Since the lengths of the three convex slide bars (86) are set differently, the opening time of the three ball valves (63) is different, and the amount of the liquid flowing in the L-shaped connecting pipe (621) and falling from the through groove (72) to the measuring cylinder (93) is different.

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