Analysis device and method for judging honey source

Abstract

The invention discloses an analysis device and method for judging the source of honey, and the device comprises a device bottom plate, a motor, a limiting clamping plate, a driving rotating shaft, a limiting block, a first auxiliary mechanism, a second auxiliary mechanism, a communicating pipe and a screen hoop, when a screen needs to be replaced, a first on-off valve is kept unblocked, meanwhile, a second on-off valve is closed, and the screen is replaced. The ground samples in the pipeline main body are sieved into the sieving cavity through the highly rotating negative pressure fan, at the moment, the coarse-granularity ground samples remain on the sieve, the fine-granularity ground samples all enter the sieving cavity, the mechanism main body is driven by the air cylinder to descend and reset, the rotating disc is driven by the motor to rotate, and then the ground samples are sieved into the sieving cavity. Screen hoop rings with different mesh numbers are arranged between the first auxiliary mechanism and the second auxiliary mechanism, the steps are repeated to continue to circularly screen the remaining samples till the samples with the needed granularity are obtained, the ground samples can be automatically screened to the needed granularity, the screens can be automatically replaced, and the screening efficiency of the samples can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of honey detection technology, and in particular to an analysis device and method for determining the source of honey. Background Art

[0002] Honey is rich in a variety of chemical components, and its quality characteristics are closely related to its geographical origin and nectar plants. In particular, its appearance, taste and nutritional characteristics are often determined by the nectar plants. At present, studies using carbon stable isotope technology to trace the origin and analyze the quality of honey have shown that some components of honey are related to the pollen and nectar of plants. These studies mainly focus on mature honey, and no research has been done on the fractionation of carbon stable isotopes from flowers, stamens, nectar to honey and its components.

[0003] The existing Chinese patent with authorization announcement number CN114088848B discloses a method and application for identifying the origin of honey, by performing Pearson correlation analysis on the carbon stable isotope ratio in the protein of the honey to be identified and the carbon stable isotope ratio in the stamens of the nectar plants of each origin, so as to identify the origin of the honey to be identified; the nectar plant is determined according to the type of the honey to be identified. The present invention can provide a fast, accurate, stable and reliable method for tracing the origin of honey.

[0004] The shortcomings of the above-mentioned existing technical solutions are: before the carbon isotope comparative determination, the plant samples need to be freeze-dried and ground and sieved, and the ground samples need to be sieved multiple times through sieves with different apertures to achieve the required particle size sample. During the multiple sieving processes, the sieves need to be replaced multiple times, which is not conducive to the operation of the experimenter and is not conducive to improving the screening efficiency of the samples. Summary of the invention

[0005] The purpose of the present invention is to provide an analysis device and method for determining the origin of honey, so as to solve the technical problem in the prior art that when screening plant samples, the ground samples need to be screened multiple times through sieves with different apertures to achieve the required particle size sample, which is not conducive to improving the screening efficiency of the samples.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solutions:

[0007] A device for determining the source of honey, comprising:

[0008] Auxiliary mechanism 1, including a mechanism bottom plate, a mechanism main body is arranged above the mechanism bottom plate, a cylinder for driving the mechanism main body to rise and fall is arranged on the mechanism bottom plate, a sieving cavity is provided on the mechanism main body, a mechanism connecting pipe is fixedly connected to one side end of the mechanism main body, and the mechanism connecting pipe is communicated with the sieving cavity;

[0009] Auxiliary mechanism 2 includes a pipeline body, a mounting frame is arranged inside the pipeline body, a negative pressure fan is arranged at the lower end of the mounting frame, a mechanism motor for driving the negative pressure fan to rotate is arranged on the mounting frame, a mechanism connecting pipe is fixedly connected to one side end of the pipeline body, the mechanism connecting pipe is connected to the pipeline body, and a connecting pipe is arranged between the mechanism connecting pipe and the mechanism connecting pipe;

[0010] A mounting plate, the mounting plate is arranged between the auxiliary mechanism 1 and the auxiliary mechanism 2, a circular through groove is penetrated on the end surface of the mounting plate, sleeves are evenly distributed and fixedly connected at the edges of the circular through grooves, sleeve sleeve rods are movably sleeved on the sleeves, a screen hoop is arranged above the mounting plate, a screen is fixedly installed on the screen hoop, connecting convex plates corresponding to the sleeve sleeve rods are evenly distributed on the side ends of the screen hoop, and the connecting convex plates are fixedly connected to the sleeve sleeve rods;

[0011] The device bottom plate and the mechanism bottom plate are fixedly connected to the device bottom plate.

[0012] As a further solution of the present invention: the cylinder is fixedly connected to the bottom plate of the mechanism, a telescopic rod is fixedly connected to the driving end of the cylinder, a docking ring is sleeved and fixedly connected to the outside of the mechanism body, the docking ring is arranged at the opening of the screening cavity of the mechanism body, the telescopic rod is fixedly connected to the lower end face of the docking ring, a sealing ring groove is provided on the upper end face of the docking ring, and an on-off valve is fixedly installed on the mechanism connecting pipe.

[0013] As a further solution of the present invention: the mounting frame is fixedly connected to the inner wall of the pipeline main body, a bearing is embedded through the mounting frame, a driving shaft is coaxially fixedly connected to the driving end of the mechanism motor, the outer ring of the bearing is fixedly connected to the mounting frame, the driving shaft is sleeved and fixedly connected to the inner ring of the bearing, the negative pressure fan and the driving shaft are coaxially fixedly connected, an on-off valve 2 is fixedly installed on the mechanism connecting pipe, a docking ring 2 is fixedly connected to the side of the pipeline main body close to the mounting plate, a docking ring groove is provided on the lower end surface of the docking ring 2, and a hanging ring is fixedly connected to the outside of the pipeline main body.

[0014] As a further solution of the present invention: a motor is fixedly connected to the bottom plate of the device, a fixed plate is provided on one side end of the motor, the fixed plate is fixedly connected to the bottom plate of the device, a driving shaft is fixedly connected to the driving end of the motor, a limiting block is sleeved through and fixedly connected to the driving shaft, a limiting clamping plate is clamped on the limiting block, the limiting clamping plate is fixedly connected to the fixed plate, a rotating disk is coaxially fixedly connected to the driving shaft, and four connecting rods are evenly distributed in an annular shape and fixedly connected to the side end of the rotating disk.

[0015] As a further solution of the present invention: four mounting plates are provided, and the four mounting plates are fixedly connected to four connecting rods respectively.

[0016] As a further solution of the present invention: the limiting clamping plate is a U-shaped clamping plate, and the limiting block is a square limiting block with smooth transition on all sides.

[0017] As a further solution of the present invention: both upper and lower end surfaces of the screen hoop ring are fixedly connected with sealing rubber rings, and the sealing rubber rings on the upper and lower end surfaces are respectively arranged corresponding to the docking ring groove and the sealing ring groove.

[0018] An analysis method for determining the source of honey by an analysis device, comprising the following steps:

[0019] Step 1: Install sieves of different mesh sizes on the sieve hoop, with auxiliary mechanism 1 and auxiliary mechanism 2 as the starting point. Assuming that the sieve hoops on the four mounting plates rotate clockwise, the mesh sizes of the sieves on the sieve hoop increase counterclockwise.

[0020] Step 2: Start the cylinder to lift the main body of the mechanism, so that the docking ring 1 rises and contacts the screen hoop ring and lifts the screen hoop ring to contact the docking ring 2 at the lower end of the pipe body, so that the auxiliary mechanism 1, the auxiliary mechanism 2 and the interior of the connecting pipe form a circulating closed space.

[0021] Step 3: Open the cover and put the ground sample into the pipeline body, start the mechanism motor to drive the negative pressure fan to rotate, and drive the ground sample to circulate and screen in the closed space formed by the auxiliary mechanism 1, the auxiliary mechanism 2 and the connecting pipe through the negative pressure fan.

[0022] Step 4: The rotating disk is driven to rotate by a motor, and screen hoops of different mesh sizes are arranged between the auxiliary mechanism 1 and the auxiliary mechanism 2, so that the screens of different mesh sizes can be automatically replaced.

[0023] Beneficial effects of the present invention:

[0024] 1. When the present invention is in use, the cover plate is opened to put the ground sample into the pipeline body, the motor of the starting mechanism drives the negative pressure fan to rotate, and the ground sample is driven by the negative pressure fan to circulate and screen in the closed space formed by the auxiliary mechanism 1, the auxiliary mechanism 2 and the internal circulation of the connecting pipe. After a period of circulation and screening, when the screen needs to be replaced, the on-off valve 1 is kept unobstructed and the on-off valve 2 is closed at the same time. The ground sample in the pipeline body is screened into the screening cavity by the highly rotating negative pressure fan. At this time, the coarse-grained ground sample will remain on the screen, and the fine-grained ground sample will all enter the screening cavity. The cylinder drives the mechanism body to descend and reset, and the motor drives the rotating disk to rotate, and the screen hoop rings of different meshes are set between the auxiliary mechanism 1 and the auxiliary mechanism 2. Repeat the above steps to continue to circulate and screen the remaining samples until the required particle size sample is reached. The device can automatically screen the ground sample to the required particle size and can automatically replace the screen, which is beneficial to improving the screening efficiency of the sample;

[0025] 2. The limit card plate of the present invention is a U-shaped card plate, and the limit block is a square limit block with smooth transitions on all sides. Under the limit adjustment of the limit card plate and the limit block, the motor can drive the rotating disk to rotate 90 degrees at a time, thereby driving the connecting rod and the mounting plate to rotate 90 degrees at a time, thereby facilitating the alignment of the screen hoop when rotating and adjusting between auxiliary mechanism one and auxiliary mechanism two, thereby improving the reliability and ease of use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention without the auxiliary mechanism 2;

[0029] Figure 3 It is a schematic diagram of the three-dimensional structure of the auxiliary mechanism 2 of the present invention;

[0030] Figure 4 It is a schematic diagram of the cross-sectional structure of two parts of the auxiliary mechanism of the present invention;

[0031] Figure 5 It is a three-dimensional structural schematic diagram of the auxiliary mechanism of the present invention;

[0032] Figure 6 The present invention Figure 2 Enlarged structural diagram at A in the middle.

[0033] In the figure: 1. device bottom plate; 2. motor; 3. fixing plate; 4. limit card plate; 5. driving shaft; 6. limit block; 7. auxiliary mechanism 1; 71. mechanism bottom plate; 72. mechanism body; 73. screening chamber; 74. docking ring 1; 75. sealing ring groove; 76. cylinder; 77. telescopic rod; 78. on-off valve 1; 8. auxiliary mechanism 2; 81. pipeline body; 82. lifting ring; 83. mounting frame; 84. docking ring 2; 85. negative pressure fan; 86. mechanism motor; 87. protective cover; 88. mechanism connecting pipe; 89. on-off valve 2; 9. connecting pipe; 10. rotating disk; 11. connecting rod; 12. mounting plate; 13. circular through groove; 14. sleeve; 15. sleeve sleeve rod; 16. screen hoop; 17. connecting convex plate; 18. sealing rubber ring; 19. cover plate. 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] like Figure 1-Figure 6 As shown, a device for analyzing the source of honey comprises:

[0036] The auxiliary mechanism 1 7 comprises a mechanism bottom plate 71, a mechanism main body 72 is arranged above the mechanism bottom plate 71, a cylinder 76 for driving the mechanism main body 72 to rise and fall is arranged on the mechanism bottom plate 71, a sieve cavity 73 is provided on the mechanism main body 72, a mechanism connecting pipe is fixedly connected to one side end of the mechanism main body 72, and the mechanism connecting pipe is communicated with the sieve cavity 73;

[0037] Auxiliary mechanism 2 8, including a pipe body 81, a mounting frame 83 is provided in the pipe body 81, a negative pressure fan 85 is provided at the lower end of the mounting frame 83, a mechanism motor 86 for driving the negative pressure fan 85 to rotate is provided on the mounting frame 83, a mechanism connecting pipe 88 is fixedly connected to one side end of the pipe body 81, the mechanism connecting pipe 88 is connected to the pipe body 81, and a connecting pipe 9 is provided between the mechanism connecting pipe 88 and the mechanism connecting pipe;

[0038] The mounting plate 12 is arranged between the auxiliary mechanism 1 7 and the auxiliary mechanism 2 8. A circular through groove 13 is formed on the end surface of the mounting plate 12. Sleeves 14 are evenly distributed and fixedly connected at the notch edges of the circular through grooves 13. Sleeve rods 15 are movably sleeved on the sleeves 14. A screen hoop 16 is arranged above the mounting plate 12. A screen is fixedly installed on the screen hoop 16. Connecting convex plates 17 corresponding to the sleeve rods 15 are evenly distributed on the side ends of the screen hoop 16. The connecting convex plates 17 are fixedly connected to the sleeve rods 15.

[0039] The device bottom plate 1 and the mechanism bottom plate 71 are fixedly connected to the device bottom plate 1 .

[0040] The cylinder 76 is fixedly connected to the mechanism bottom plate 71, and a telescopic rod 77 is fixedly connected to the driving end of the cylinder 76. A docking ring 74 is sleeved and fixedly connected to the outer side of the mechanism body 72. The docking ring 74 is arranged at the opening of the screening cavity 73 of the mechanism body 72. The telescopic rod 77 is fixedly connected to the lower end surface of the docking ring 74. A sealing ring groove 75 is provided on the upper end surface of the docking ring 74. An on-off valve 78 is fixedly installed on the mechanism connecting pipe.

[0041] The mounting frame 83 is fixedly connected to the inner wall of the pipeline body 81, and a bearing is embedded in the mounting frame 83. A driving shaft is coaxially fixedly connected to the driving end of the mechanism motor 86, and the outer ring of the bearing is fixedly connected to the mounting frame 83. The driving shaft is sleeved and fixedly connected to the inner ring of the bearing. The negative pressure fan 85 is coaxially fixedly connected to the driving shaft. An on-off valve 89 is fixedly installed on the mechanism connecting pipe 88. A docking ring 84 is fixedly connected to the side of the pipeline body 81 close to the mounting plate 12, and a docking ring groove is provided on the lower end surface of the docking ring 84. A hanging ring 82 is fixedly connected to the outside of the pipeline body 81, and the auxiliary mechanism 8 can be suspended and fixedly installed by the hanging ring 82. A cover plate 19 is provided at the upper end opening of the pipeline body 81.

[0042] A motor 2 is fixedly connected to the device base plate 1, and a fixing plate 3 is provided at one side end of the motor 2. The fixing plate 3 is fixedly connected to the device base plate 1. A driving shaft 5 is fixedly connected to the driving end of the motor 2. A limiting block 6 is sleeved through the driving shaft 5 and fixedly connected. A limiting clamping plate 4 is clamped on the limiting block 6. The limiting clamping plate 4 is fixedly connected to the fixing plate 3. A rotating disk 10 is coaxially fixedly connected to the driving shaft 5. Four connecting rods 11 are evenly distributed in an annular shape and fixedly connected to the side end of the rotating disk 10. Four mounting plates 12 are provided, and the four mounting plates 12 are fixedly connected to the four connecting rods 11 respectively.

[0043] In some specific implementation schemes, the limiting clamping plate 4 is a U-shaped clamping plate, and the limiting block 6 is a square limiting block with smooth transitions on all sides.

[0044] The upper and lower end surfaces of the screen hoop ring 16 are fixedly connected with sealing rubber rings 18 , and the sealing rubber rings 18 on the upper and lower end surfaces are respectively arranged corresponding to the docking ring groove and the sealing ring groove 75 .

[0045] In some specific embodiments, the outer shell of the mechanism motor 86 is provided with a protective cover 87 for isolating static electricity. The protective cover 87 can prevent the powdered plant sample from being adsorbed on the outer shell of the mechanism motor 86.

[0046] In some specific embodiments, the connecting pipe 9 is a hose.

[0047] An analysis method for determining the source of honey by an analysis device, comprising the following steps:

[0048] Step 1: Install sieves of different mesh sizes on the sieve hoop 16, and take auxiliary mechanism 1 7 and auxiliary mechanism 2 8 as the starting point. Assuming that the sieve hoop 16 on the four mounting plates 12 rotates clockwise, the mesh size of the sieve on the sieve hoop 16 increases counterclockwise.

[0049] Step 2: Start the cylinder 76 to lift the mechanism body 72, so that the docking ring 1 74 rises and contacts the screen hoop 16 and lifts the screen hoop 16 to contact the docking ring 2 84 at the lower end of the pipe body 81, so that the interior of the auxiliary mechanism 1 7, the auxiliary mechanism 2 8 and the connecting pipe 9 form a circulating closed space.

[0050] Step 3: Open the cover 19 and put the ground sample into the pipeline body 81, start the mechanism motor 86 to drive the negative pressure fan 85 to rotate, and drive the ground sample to circulate and screen in the closed space formed by the auxiliary mechanism 1 7, the auxiliary mechanism 2 8 and the connecting pipe 9 through the negative pressure fan 85.

[0051] Step 4: The rotating disk 10 is driven to rotate by the motor 2, and the screen hoops 16 of different mesh sizes are arranged between the auxiliary mechanism 1 7 and the auxiliary mechanism 2 8, so that the screens of different mesh sizes can be automatically replaced.

[0052] In order to facilitate the understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution is briefly described in combination with specific application scenarios:

[0053] Open the cover 19 and put the ground sample into the pipeline main body 81, start the mechanism motor 86 to drive the negative pressure fan 85 to rotate, and the negative pressure fan 85 drives the ground sample to circulate and screen in the closed space formed by the auxiliary mechanism 1 7, the auxiliary mechanism 2 8 and the connecting pipe 9. After a period of circulation and screening, when the screen needs to be replaced, the on-off valve 1 78 is kept unobstructed and the on-off valve 2 89 is closed at the same time. The ground sample in the pipeline main body 81 is screened into the screening chamber 73 by the highly rotating negative pressure fan 85. At this time, the coarse-grained ground sample will remain on the screen, and the fine-grained ground sample will all enter the screening chamber 73. The cylinder 76 drives the mechanism main body 72 to descend and reset, and the motor 2 drives the rotating disk 10 to rotate. The sieve hoop 16 of different mesh sizes is set between the auxiliary mechanism 1 7 and the auxiliary mechanism 2 8, and the above steps are repeated to continue to circulate and screen the remaining samples until the required particle size sample is reached. The device can automatically screen the ground sample to the required particle size and can automatically replace the sieve, which is beneficial to improving the screening efficiency of the sample. The limit card plate 4 is a U-shaped card plate, and the limit block 6 is a square limit block with smooth transition on all sides. Under the limit adjustment of the limit card plate 4 and the limit block 6, the motor 2 can drive the rotating disk 10 to rotate 90 degrees at a time, thereby driving the connecting rod 11 and the mounting plate 12 to rotate 90 degrees at a time, thereby facilitating the alignment of the sieve hoop 16 when rotating and adjusting between the auxiliary mechanism 1 7 and the auxiliary mechanism 2 8, thereby improving the reliability and ease of use of the device.

[0054] Several embodiments of the present invention are described in detail above, but the embodiments of the present invention are not limited thereto and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A honey source analysis device, characterized in that: include: Auxiliary mechanism 1 (7), comprising a mechanism bottom plate (71), a mechanism main body (72) is arranged above the mechanism bottom plate (71), a cylinder (76) for driving the mechanism main body (72) to move up and down is arranged on the mechanism bottom plate (71), a sieve cavity (73) is provided on the mechanism main body (72), a mechanism connecting pipe is fixedly connected to one side end of the mechanism main body (72), and the mechanism connecting pipe is in communication with the sieve cavity (73); Auxiliary mechanism 2 (8), comprising a pipeline body (81), a mounting frame (83) is arranged inside the pipeline body (81), a negative pressure fan (85) is arranged at the lower end of the mounting frame (83), a mechanism motor (86) for driving the negative pressure fan (85) to rotate is arranged on the mounting frame (83), a mechanism connecting pipe (88) is fixedly connected to one side end of the pipeline body (81), the mechanism connecting pipe (88) is connected to the pipeline body (81), and a connecting pipe (9) is arranged between the mechanism connecting pipe (88) and the mechanism connecting pipe; A mounting plate (12), the mounting plate (12) being arranged between the auxiliary mechanism 1 (7) and the auxiliary mechanism 2 (8), a circular through groove (13) being formed through the end surface of the mounting plate (12), sleeves (14) being evenly distributed and fixedly connected at the notch edge of the circular through groove (13), sleeve rods (15) being movably sleeved on the sleeves (14), a screen hoop (16) being arranged above the mounting plate (12), a screen being fixedly mounted on the screen hoop (16), connecting convex plates (17) corresponding to the sleeve rods (15) being evenly distributed on the side ends of the screen hoop (16), the connecting convex plates (17) being fixedly connected to the sleeve rods (15); The device bottom plate (1) and the mechanism bottom plate (71) are fixedly connected to the device bottom plate (1).

2. The honey source analysis device according to claim 1, characterized in that: The cylinder (76) is fixedly connected to the mechanism bottom plate (71); a telescopic rod (77) is fixedly connected to the driving end of the cylinder (76); a docking collar (74) is sleeved and fixedly connected to the outer side of the mechanism body (72); the docking collar (74) is arranged at the opening of the screening cavity (73) of the mechanism body (72); the telescopic rod (77) is fixedly connected to the lower end surface of the docking collar (74); a sealing ring groove (75) is provided on the upper end surface of the docking collar (74); and an on-off valve (78) is fixedly installed on the mechanism connecting pipe.

3. The honey source analysis device according to claim 1, characterized in that: The mounting frame (83) is fixedly connected to the inner wall of the pipeline body (81), and a bearing is embedded in the mounting frame (83). A driving shaft is coaxially fixedly connected to the driving end of the mechanism motor (86), and the outer ring of the bearing is fixedly connected to the mounting frame (83). The driving shaft is sleeved and fixedly connected to the inner ring of the bearing. The negative pressure fan (85) and the driving shaft are coaxially fixedly connected. An on-off valve (89) is fixedly installed on the mechanism connecting pipe (88). A docking ring (84) is fixedly connected to the side of the pipeline body (81) close to the mounting plate (12), and a docking ring groove is provided on the lower end surface of the docking ring (84). A hanging ring (82) is fixedly connected to the outer side of the pipeline body (81).

4. The honey source analysis device according to claim 1, characterized in that: A motor (2) is fixedly connected to a device bottom plate (1), a fixing plate (3) is provided at one side end of the motor (2), the fixing plate (3) is fixedly connected to the device bottom plate (1), a driving shaft (5) is fixedly connected to a driving end of the motor (2), a limiting block (6) is sleeved through and fixedly connected to the driving shaft (5), a limiting clamping plate (4) is clamped on the limiting block (6), the limiting clamping plate (4) is fixedly connected to the fixing plate (3), a rotating disk (10) is coaxially fixedly connected to the driving shaft (5), and four connecting rods (11) are evenly distributed in an annular shape and fixedly connected to the side end of the rotating disk (10).

5. The honey source analysis device according to claim 4, characterized in that: Four mounting plates (12) are provided, and the four mounting plates (12) are fixedly connected to the four connecting rods (11) respectively.

6. The honey source analysis device according to claim 1, characterized in that: The limiting card plate (4) is a U-shaped card plate, and the limiting block (6) is a square limiting block with smooth transition on all sides.

7. The honey source analysis device according to claim 1, characterized in that: The upper and lower end surfaces of the screen mesh hoop ring (16) are fixedly connected with sealing rubber rings (18), and the sealing rubber rings (18) on the upper and lower end surfaces are respectively arranged corresponding to the docking ring groove and the sealing ring groove (75).

8. The method for analyzing the honey source according to any one of claims 1 to 7, characterized in that: The steps include: S1: Install sieves of different mesh sizes on the sieve hoop (16), and take the auxiliary mechanism 1 (7) and the auxiliary mechanism 2 (8) as the starting point. Assuming that the sieve hoop (16) on the four mounting plates (12) rotates clockwise, the mesh sizes of the sieves on the sieve hoop (16) increase counterclockwise in sequence; S2: Start the cylinder (76) to lift the mechanism body (72), so that the docking ring 1 (74) rises and contacts the screen hoop (16), and the screen hoop (16) is lifted and contacts the docking ring 2 (84) at the lower end of the pipeline body (81), so that the interior of the auxiliary mechanism 1 (7), the auxiliary mechanism 2 (8) and the connecting pipe (9) form a circulating closed space; S3: Open the cover plate (19) and place the ground sample into the pipeline body (81), start the mechanism motor (86) to drive the negative pressure fan (85) to rotate, and drive the ground sample to circulate and screen in the closed space formed by the auxiliary mechanism 1 (7), the auxiliary mechanism 2 (8) and the connecting pipe (9) through the negative pressure fan (85); S4: The motor (2) drives the rotating disk (10) to rotate, and the screen hoops (16) of different mesh sizes are arranged between the auxiliary mechanism 1 (7) and the auxiliary mechanism 2 (8), so that the screens of different mesh sizes can be automatically replaced.

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