A sample drying and screening system and screening method for soil detection

Abstract

The present invention discloses a sample drying and screening system and screening method for soil detection. The sample drying and screening system for soil detection comprises: a containing mechanism, comprising a barrel, the upper end of which is fixedly connected to a cover, and the cover has a feed port; a drying mechanism, comprising a stirring shaft, one end of which is located outside the barrel, and the other end is located inside the barrel, the outer surface of the stirring shaft is surrounded by spiral blades, and the spiral blades are located in the barrel, the stirring shaft has an air inlet channel inside, one end of which is located outside the barrel, and the other end of which is located inside the barrel; a screening mechanism, comprising a screen, and the screen is arranged on the inner wall of the barrel. The invention can efficiently and simultaneously dry and screen a large number of soil samples.

Description

Technical Field

[0001] The present invention belongs to the technical field of soil detection, and in particular relates to a sample drying and screening system and a screening method for soil detection. Background Art

[0002] Soil sampling refers to the method of collecting soil samples, including the layout of sampling and sampling technology. The required soil samples can be collected from a specific environment as needed. Soil samples can be used for soil environmental monitoring, soil pollution control, farmland soil improvement, etc. For soil, different pretreatment methods can be selected according to the different characteristics of the measured substances. In the entire detection and analysis process, 60% of the analysis errors come from the sample pretreatment method. After obtaining the soil sample, the soil needs to be dried and screened if necessary, such as screening out grass, leaves, branches or garbage, so that the inspection of the soil sample is more accurate.

[0003] For large quantities of soil samples, there is a lack of equipment that can efficiently and simultaneously dry and screen large quantities of soil samples. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a sample drying and screening system and screening method for soil testing, which has the advantages of being able to efficiently and simultaneously dry and screen a large number of soil samples, solving the problem of being able to efficiently and simultaneously dry and screen a large number of soil samples in the prior art.

[0005] The present invention is implemented as follows: a soil testing sample drying and screening system, comprising:

[0006] The accommodating mechanism comprises a barrel body, the upper end of which is fixedly connected to a cover body, and the cover body is provided with a feed inlet;

[0007] The drying mechanism comprises a stirring shaft, one end of the stirring shaft is located outside the barrel body, and the other end is located inside the barrel body, the outer surface of the stirring shaft is surrounded by a spiral blade, and the spiral blade is located in the barrel body, and the stirring shaft has an air inlet channel inside, one end of the air inlet channel is located outside the barrel body, and the other end of the air inlet channel is located inside the barrel body;

[0008] The screening mechanism comprises a screen, and the screen is arranged on the inner wall of the barrel.

[0009] As a preferred embodiment of the present invention, a plurality of air holes are provided on the stirring shaft, the plurality of air holes are equidistantly arranged along the axial direction of the stirring shaft, and the air holes are connected to the air inlet channel.

[0010] As a preferred embodiment of the present invention, a first motor is fixedly connected to the cover body, and a first gear is fixedly connected to an output end of the first motor; a second gear is fixedly connected to the stirring shaft, and the second gear is meshed with the first gear.

[0011] As a preferred embodiment of the present invention, the cover body is connected to a feed hopper, the lower end of the feed hopper is connected to the feed port, the feed hopper is rotatably connected to a feed door, and one side of the feed hopper has a limit plate; the lower side of the second gear has a first flexible lever, and the end of the first flexible lever can move the feed door. Exemplarily, the first flexible lever is set as an elastic rubber lever.

[0012] As a preferred embodiment of the present invention, the barrel body is a rectangular barrel body, the side wall of the barrel body is provided with a transverse through hole, a support frame is fixedly connected to the outside of the through hole, a support frame is rotatably connected to the support frame via a pin shaft, the support frame partially extends into the interior of the barrel body, and the screen is fixedly connected to the support frame.

[0013] As a preferred embodiment of the present invention, a telescopic driving rod is rotatably connected to the outer surface of the barrel body, and the other end of the telescopic driving rod is rotatably connected to the supporting frame.

[0014] As a preferred embodiment of the present invention, the screen has a feed discharge port, the feed discharge port is located on the outside of the barrel body, and the screen has two symmetrically arranged figure eight material guide plates, one side of the figure eight material guide plate is aligned with the feed discharge port.

[0015] As a preferred embodiment of the present invention, the screen has limiting holes;

[0016] A support sheet is fixedly connected to the lower side of the support frame, and a rectangular limit block is connected to the upper side of the support via a second elastic member. The limit block is inserted into the limit hole, and a locking block with the same length and width as the rectangular limit block is rotatably connected to the rectangular limit block. A second locking screw is rotatably connected to the locking block via a thread, and an end of the second locking screw can be pressed against the support frame.

[0017] As a preferred embodiment of the present invention, a vibration motor is arranged on the screen.

[0018] A screening method of the above-mentioned soil testing sample drying screening system comprises the following steps:

[0019] Feeding the soil sample to be dried and screened into the barrel from the feed port;

[0020] The spiral blade is driven to rotate by the stirring shaft, and the spiral blade flips the soil sample located in the middle of the barrel upward, and after rising to a certain height, it falls to the surroundings. The soil sample that falls to the surroundings moves downward under the action of gravity, and falls to the bottom of the barrel after passing through the screen;

[0021] The external gas generating device injects gas into the barrel through the air inlet passage to dry the soil sample.

[0022] The beneficial effects are as follows:

[0023] 1. In the present invention, the soil sample to be dried and screened is fed into the barrel from the feed port, and the spiral blade is driven to rotate by the rotation of the stirring shaft. The spiral blade flips the soil sample located in the middle of the barrel upward, and after rising to a certain height, it falls to the surroundings and moves downward under the action of gravity, thereby forming a cycle with the middle part upward and the surroundings downward. At the same time, the air inlet channel is connected to an external gas generating device, and the gas generating device injects gas into the barrel through the air inlet channel to dry the soil sample. Since the soil sample is in a cycle with the middle part upward and the surroundings downward, the gaps between the soil samples are larger and the drying effect is better. In addition, the soil samples falling from the surroundings will pass through the screen, so that the impurities in the soil sample can be screened out through the screen, so that a large number of soil samples can be dried and screened efficiently and simultaneously.

[0024] 2. In the present invention, an air inlet channel is provided, and an external extraction device can be connected to the air inlet channel to extract the dried powdered or granular soil sample. The gas in the air inlet channel can be discharged through the air holes, and thus evenly distributed in the barrel, which can improve the drying efficiency.

[0025] 3. In the present invention, when feeding into the barrel through the feed hopper, the second gear rotates in the first direction to push open the feed door, and at this time, the spiral blade rotates to shake off the soil sample that falls on the spiral blade, so as to prevent the soil sample from accumulating on the spiral blade and causing blockage. After the feeding is completed, the second gear rotates in the opposite direction to the first direction, so that the first flexible lever can push the feed door to close, and at the same time, the second gear drives the stirring shaft to work normally. The feed door is closed to prevent the soil sample from being contaminated by external impurities. Among them, the limit plate is set as a right-angle limit plate, and the limit plate is used to limit the degree of opening and closing of the feed door 13.

[0026] 4. In the present invention, the side wall of the barrel is provided with a transverse through hole, and the screen extends through the through hole to the outside of the barrel. In the first aspect, the support frame can drive the screen to tilt outward, so that the impurities on the screen slide to the outside of the barrel under the action of gravity, which is convenient for removing the impurities.

[0027] Secondly, the support frame can drive the screen to tilt up and down along the pin shaft in real time, thereby improving the screening efficiency of the screen and reducing the risk of screen blockage.

[0028] Thirdly, the screen is connected to the barrel through the support frame, so that the screen can be easily removed from the support frame, thereby facilitating cleaning or replacement of screens of different types.

[0029] Fourthly, the screen and the support frame can be elastically connected, and a vibration motor can be set on the screen to drive the screen to vibrate, thereby screening the soil sample. The screen and the support frame are elastically connected, and the vibration of the screen is not easily transmitted to the barrel body, thereby reducing the vibration of the barrel body. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the present invention;

[0031] Figure 2 is a schematic cross-sectional structural diagram of the present invention from a first viewing angle;

[0032] Figure 3 It is a schematic diagram of the top view of the structure of the present invention;

[0033] Figure 4 is a schematic structural diagram of a first flexible lever of the present invention;

[0034] Figure 5 is a schematic cross-sectional structural diagram of the present invention from a second viewing angle;

[0035] Figure 6 The present invention Figure 5 The enlarged structural diagram of part A in the middle;

[0036] Figure 7 The present invention Figure 5 A schematic diagram of the cross-sectional structure of the enlarged portion A;

[0037] Figure 8 is a schematic cross-sectional structural diagram of the present invention from a third viewing angle;

[0038] Fig. 9 The present invention Figure 8 Schematic diagram of the enlarged structure of part B. DETAILED DESCRIPTION

[0039] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0040] The structure of the present invention is described in detail below in conjunction with the accompanying drawings.

[0041] See also Figure 1 and Figure 2 ,in, Figure 1 It is a schematic diagram of the structure of a sample drying and screening system for soil testing provided by an embodiment of the present invention; Figure 2It is a schematic cross-sectional structure diagram of a soil detection sample drying and screening system provided by an embodiment of the present invention from a first viewing angle.

[0042] A soil detection sample drying and screening system provided by an embodiment of the present invention includes a containing mechanism, a drying mechanism and a drying mechanism.

[0043] The accommodating mechanism comprises a barrel body 1, the upper end of which is fixedly connected to a cover body 2, and the cover body 2 has a feed inlet 3 (see Figure 3 );

[0044] The drying mechanism includes a stirring shaft 4, one end of which is located outside the barrel body 1, and the other end is located inside the barrel body 1. The outer surface of the stirring shaft 4 is surrounded by a spiral blade 5, and the spiral blade 5 is located in the barrel body 1. The stirring shaft 4 has an air inlet channel 6 inside, one end of which is located outside the barrel body 1, and the other end of which is located inside the barrel body 1.

[0045] The screening mechanism comprises a screen 7 , and the screen 7 is arranged on the inner wall of the barrel body 1 .

[0046] Through this arrangement, the soil sample to be dried and screened is fed into the barrel body 1 from the feed port 3, and the spiral blade 5 is driven to rotate by the rotation of the stirring shaft 4. The spiral blade 5 flips the soil sample located in the middle of the barrel body 1 upward, and after rising to a certain height, it falls to the surroundings and moves downward under the action of gravity, thereby forming a cycle with the middle part upward and the surroundings downward. At the same time, the air inlet channel 6 is connected to an external gas generating device (such as a fan), and the gas generating device injects gas into the barrel body 1 through the air inlet channel 6 to dry the soil sample. Since the soil sample is in a cycle with the middle part upward and the surroundings downward, the gap between the soil samples is larger and the drying effect is better. In addition, the soil sample falling downward on all sides will pass through the screen 7, so that the impurities in the soil sample can be screened out by the screen 7. Therefore, large quantities of soil samples can be dried and screened efficiently and simultaneously.

[0047] Furthermore, through the above arrangement, the air inlet passage 6 can be connected to an external extraction device to extract the dried powdered or granular soil sample.

[0048] For further information, see Figure 2 , Figure 2 1 is a schematic cross-sectional structural diagram of a soil testing sample drying and screening system provided by an embodiment of the present invention from a first perspective. The stirring shaft 4 is provided with a plurality of air holes 8, which are equidistantly arranged along the axial direction of the stirring shaft 4, and the air holes 8 are connected to the air inlet channel 6. The gas in the air inlet channel 6 can be discharged through the air holes 8, so as to be evenly distributed in the barrel 1, which can improve the drying efficiency.

[0049] For example, see Figure 1 , Figure 1 : is a schematic diagram of the structure of the soil detection sample drying and screening system provided by an embodiment of the present invention, and the method of driving the stirring shaft 4 to rotate is:

[0050] The cover body 2 is fixedly connected with a first motor 9, and the output end of the first motor 9 is fixedly connected with a first gear 10; the stirring shaft 4 is fixedly connected with a second gear 11, and the second gear 11 is meshed with the first gear 10. In this way, the first motor 9 can drive the stirring shaft 4 to rotate through the transmission of the first gear 10 and the second gear 11. At this time, the air inlet channel 6 is connected with the outside of the barrel body 1 through the upper end of the stirring shaft 4, so as to be connected with the gas generating device through the rotary joint.

[0051] For further information, see Figure 3 , Figure 3 1 is a top view of the structure of the sample drying and screening system for soil testing provided by an embodiment of the present invention. The cover body 2 is connected to a feed hopper 12, the lower end of the feed hopper 12 is connected to the feed port 3, a feed door 13 is rotatably connected to the feed hopper 12, and a limit plate 14 is provided on one side of the feed hopper 12; the lower side of the second gear 11 is provided with a first flexible lever 15, and the end of the first flexible lever 15 can move the feed door 13. For example, please refer to Figure 4 The first flexible lever 15 includes a first sub-rod 151, an end of the first sub-rod 151 has a receiving groove 152, a slider 153 is arranged in the receiving groove 152, a first locking screw 154 is rotatably connected to the first sub-rod 151 through a thread, the end of the first locking screw 154 can press the slider 153, a first elastic member 155 is fixedly connected to one side of the slider 153, the end of the first elastic member 155 is fixedly connected to the second sub-rod 156, the second sub-rod 156 is at least partially located in the receiving groove 152, one end of the second sub-rod 156 is fixedly connected to an elastic rubber lever 157, and the lower end of the elastic rubber lever 157 can contact the feed door 13.

[0052] With this arrangement, when feeding into the barrel body 1 through the feed hopper 12, the second gear 11 rotates in the first direction to push open the feed door 13, and at this time, the spiral blade 5 rotates to shake off the soil sample that falls on the spiral blade 5, preventing the soil sample from accumulating on the spiral blade 5 and causing blockage. After the feeding is completed, the second gear 11 rotates in the direction opposite to the first direction, so that the first flexible lever 15 can push the feed door 13 to close, and at the same time, the second gear 11 drives the stirring shaft 4 to work normally. The feed door 13 is closed to prevent the soil sample from being contaminated by external impurities. Among them, the limit plate 14 is set as a right-angle limit plate, and the limit plate 14 is used to limit the degree of opening and closing of the feed door 13.

[0053] For further information, see Figure 5 , Figure 5 It is a schematic cross-sectional structure diagram of a soil testing sample drying and screening system provided by an embodiment of the present invention from a second perspective; the barrel body 1 is a rectangular barrel body, and a transverse through hole 16 is opened on the side wall of the barrel body 1. A support frame 17 is fixedly connected to the outside of the through hole 16, and a support frame 18 is rotatably connected to the support frame 17 through a pin shaft. The support frame 18 partially extends into the interior of the barrel body 1, and the screen 7 is fixedly connected to the support frame 18.

[0054] Through this arrangement, on the one hand, the support frame 18 can drive the screen 7 to tilt outward, so that the impurities on the screen 7 slide to the outside of the barrel body 1 under the action of gravity, which is convenient for removing the impurities.

[0055] Secondly, the support frame 18 can drive the screen 7 to tilt up and down along the pin shaft in real time, thereby improving the screening efficiency of the screen 7 and reducing the risk of the screen 7 being blocked.

[0056] Thirdly, the screen 7 is connected to the barrel body 1 via the support frame 18 , so that the screen 7 can be easily removed from the support frame 18 , thereby facilitating the cleaning or replacement of the screen 7 of different types.

[0057] Fourthly, the sieve 7 and the support frame 18 can be elastically connected, and a vibration motor can be arranged on the sieve 7 to drive the sieve 7 to vibrate, thereby sieving the soil sample. The sieve 7 and the support frame 18 are elastically connected, and the vibration of the sieve 7 is not easily transmitted to the barrel body 1, thereby reducing the vibration of the barrel body 1.

[0058] The first and second aspects can be implemented in the following ways: Figure 5 , the outer surface of the barrel body 1 is rotatably connected with a telescopic drive rod 19, and the other end of the telescopic drive rod 19 is rotatably connected to the support frame 18. Specifically, the telescopic drive rod 19 can be set as a telescopic part such as an electric push rod, a cylinder, a hydraulic cylinder, etc. as needed. By shortening the telescopic drive rod 19, the support frame 18 can be rotated, thereby driving the screen 7 to tilt outward, so that the impurities on the screen 7 slide to the outside of the barrel body 1 under the action of gravity, which is convenient for removing impurities. In addition, by reciprocating the telescopic drive rod 19, the support frame 18 can drive the screen 7 to tilt up and down along the pin shaft in real time, thereby improving the screening efficiency of the screen 7 and reducing the risk of the screen 7 being blocked.

[0059] Further, for the first aspect of removing impurities, an exemplary arrangement for removing impurities is provided: see Figure 5The screen 7 has a feed opening 20, which is located outside the barrel 1, and the screen 7 has two symmetrically arranged eight-shaped guide plates 21, one side of the eight-shaped guide plates 21 is aligned with the feed opening 20. In this way, impurities can be guided to the feed opening 20 through the eight-shaped guide plates 21, thereby removing the impurities.

[0060] The third and fourth aspects can be achieved by:

[0061] See also Figure 6 and Figure 7 , Figure 6 The embodiment of the present invention provides Figure 5 The enlarged structural diagram of part A in the middle; Figure 7 The embodiment of the present invention provides Figure 5 Schematic diagram of the cross-sectional structure with part A enlarged.

[0062] The screen 7 has a limiting hole 22;

[0063] A support sheet 23 is fixedly connected to the lower side of the support frame 18, and a rectangular limit block 25 is connected to the upper side of the support sheet 23 through a second elastic member 24. The rectangular limit block 25 is inserted into the limit hole 22, and a locking block 26 having the same length and width as the rectangular limit block 25 is rotatably connected to the rectangular limit block 25. A second locking screw 27 is rotatably connected to the locking block 26 through a thread, and the end of the second locking screw 27 can be pressed against the support frame 18. The second elastic member 24 can be set as a spring or a spring. With this setting, when it is necessary to remove the screen 7, the second locking screw 27 is loosened, and the locking block 26 is rotated to align the locking block 26 with the rectangular limit block 25, so that the screen 7 can be removed.

[0064] Furthermore, since the screen 7 and the support frame 18 are connected via the second elastic member 24, the screen 7 can also move horizontally relative to the support frame 18 by tilting the second elastic member 24, thereby improving the screening efficiency. Figure 8 and Fig. 9 A second motor 28 is fixedly connected to the lower side of the support frame 18, a second flexible lever 29 is fixedly connected to the output end of the second motor 28, a paddle 30 is fixedly connected to the lower surface of the screen 7, and the second flexible lever 29 can move the screen 7 horizontally back and forth relative to the support frame 18 through the paddle 30 without hindering the disassembly of the screen 7.

[0065] Furthermore, the barrel body 1 has a discharge port 31 and legs 32 on the lower side.

[0066] The present invention also provides a screening method of a soil detection sample drying screening system, comprising the following steps:

[0067] Step S1, feeding the soil sample to be dried and screened into the barrel 1 from the feed inlet 3;

[0068] Step S2, the spiral blade 5 is driven to rotate by the stirring shaft 4, and the spiral blade 5 turns the soil sample located in the middle of the barrel 1 upward, and after rising to a certain height, it falls to the surroundings. The soil sample that falls to the surroundings moves downward under the action of gravity, and falls to the bottom of the barrel 1 after passing through the screen 7;

[0069] Step S3: The external gas generating device injects gas into the barrel 1 through the air inlet channel 6 to dry the soil sample. This method can efficiently dry and screen a large number of soil samples at the same time.

Claims

1. A sample drying and screening system for soil testing, characterized in that: include: The accommodating mechanism comprises a barrel body (1), the upper end of the barrel body (1) is fixedly connected to a cover body (2), and the cover body (2) is provided with a feed opening (3); The drying mechanism comprises a stirring shaft (4), one end of the stirring shaft (4) is located outside the barrel body (1), and the other end is located inside the barrel body (1); the outer surface of the stirring shaft (4) is surrounded by a spiral blade (5), and the spiral blade (5) is located in the barrel body (1); the stirring shaft (4) has an air intake channel (6) inside, one end of the air intake channel (6) is located outside the barrel body (1), and the other end of the air intake channel (6) is located inside the barrel body (1); The screening mechanism comprises a screen (7), wherein the screen (7) is arranged on the inner wall of the barrel (1); The stirring shaft (4) is provided with a plurality of air holes (8), the plurality of air holes (8) are arranged equidistantly along the axial direction of the stirring shaft (4), and the air holes (8) are connected to the air inlet channel (6); The barrel body (1) is a rectangular barrel body, a transverse through hole (16) is opened on the side wall of the barrel body (1), a support frame (17) is fixedly connected to the outside of the through hole (16), a support frame (18) is rotatably connected to the support frame (17) via a pin, a part of the support frame (18) extends into the interior of the barrel body (1), and the screen (7) is fixedly connected to the support frame (18); The screen (7) is provided with a limiting hole (22); a supporting sheet (23) is fixedly connected to the lower side of the supporting frame (18); a rectangular limiting block (25) is connected to the upper side of the supporting sheet (23) via a second elastic member (24); the rectangular limiting block (25) is inserted into the limiting hole (22); a locking block (26) having the same length and width as the rectangular limiting block (25) is rotatably connected to the rectangular limiting block (25); a second locking screw (27) is rotatably connected to the locking block (26) via a thread; and the end of the second locking screw (27) can be pressed against the supporting frame (18).

2. A soil testing sample drying and screening system as claimed in claim 1, characterized in that: A first motor (9) is fixedly connected to the cover body (2), and a first gear (10) is fixedly connected to the output end of the first motor (9); a second gear (11) is fixedly connected to the stirring shaft (4), and the second gear (11) is meshed with the first gear (10).

3. A soil testing sample drying and screening system as claimed in claim 2, characterized in that: The cover body (2) is connected to a feed hopper (12), the lower end of the feed hopper (12) is connected to the feed port (3), the feed hopper (12) is rotatably connected to a feed door (13), and one side of the feed hopper (12) is provided with a limit plate (14); the lower side of the second gear (11) is provided with a first flexible lever (15), and the end of the first flexible lever (15) can move the feed door (13).

4. A soil testing sample drying and screening system as claimed in claim 1, characterized in that: The outer surface of the barrel body (1) is rotatably connected to a telescopic driving rod (19), and the other end of the telescopic driving rod (19) is rotatably connected to a supporting frame (18).

5. A soil testing sample drying and screening system as claimed in claim 1, characterized in that: The screen (7) is provided with a material discharge port (20), the material discharge port (20) being located outside the barrel body (1), and the screen (7) is provided with two symmetrically arranged figure eight-shaped material guide plates (21), one side of the figure eight-shaped material guide plates (21) being aligned with the material discharge port (20).

6. A soil testing sample drying and screening system as claimed in claim 1, characterized in that: The screen (7) is provided with a vibration motor.

7. A screening method of a soil testing sample drying screening system according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: feeding a soil sample to be dried and screened into a barrel (1) from a feeding port (3); The spiral blade (5) is driven to rotate by the stirring shaft (4), and the spiral blade (5) turns the soil sample located in the middle of the barrel (1) upward, and after rising to a certain height, it is scattered to the surroundings. The soil sample scattered to the surroundings moves downward under the action of gravity, and falls to the bottom of the barrel (1) after passing through the screen (7); the external gas generating device injects gas into the barrel (1) through the air inlet channel (6) to dry the soil sample.

Images