Grinding device for adjusting particle size of soil
The grinding device, with its multi-stage grinding tank and screen design, solves the problem of complex soil grinding operations in existing technologies, achieving efficient grading and flexible particle size adjustment.
Patent Information
- Application Number
- CN202422939408.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing grinding equipment requires multiple screenings and cumbersome operations, making it difficult to obtain the required soil particles directly in a grinding tank, and the operation is complicated.
A multi-stage grinding tank structure was designed, including an upper tank, a middle tank, and a lower tank. Combining bidirectional rotation and multi-stage screens, it achieves graded grinding of soil, and the particle size can be adjusted by changing the grinding balls and screen specifications.
It achieves efficient graded grinding of soil without the need for additional screening, improving work efficiency, enhancing grinding effect and ease of operation, and meeting different experimental needs.
Smart Images
Figure CN223883278U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to soil detection technical field, concretely relates to a kind of grinding device for adjusting soil particle size. BACKGROUND
[0002] In soil detection analysis, grinding soil sample to required particle size is a crucial step, grinding can break large particles in soil sample into small particles, so that each component in soil sample is more uniformly mixed, which helps to reduce analysis error caused by uneven particle size.
[0003] Different soil analysis experiments have different requirements for the particle size of soil sample, and the currently commonly used grinder is a planetary grinding machine, which places a grinding tank on a turntable, and places grinding balls and soil sample in the grinding tank, while the turntable drives the grinding tank to rotate clockwise, the grinding tank rotates counterclockwise under the action of planetary gear transmission structure, so that the soil and grinding balls are fully contacted and ground to the required particle size.
[0004] The current grinding device uses single tank grinding, multiple grinding tanks on the turntable are respectively filled with grinding balls of different specifications, and the ground soil needs to be screened twice after grinding, once to screen out oversized particles, and once to screen out undersized particles, and if the number of screened particles is not enough, the oversized particles need to be ground again, which is relatively cumbersome to operate.
[0005] Therefore, a grinding device for adjusting soil particle size is designed, which can directly grind and screen the required soil particles in one grinding tank, and can intuitively observe the quantity of required soil when the tank is taken, reducing the operation frequency. SUMMARY
[0006] The utility model aims to provide a kind of grinding device for adjusting soil particle size, to solve the problems described in the background art.
[0007] The technical scheme of the utility model is realized as follows:
[0008] The utility model provides a kind of grinding device for adjusting soil particle size, including bottom plate and the shaft seat of being located on the upper end of bottom plate, first support and drive mechanism, first rotating shaft is vertically installed in rotation in shaft seat, first rotating shaft is driven with drive mechanism, mounting plate is horizontally fixed on the top of first rotating shaft, two second rotating shafts are vertically installed on mounting plate, two described second rotating shafts are symmetrically arranged with first rotating shaft as center, gear disc is horizontally fixed on the top of first rotating shaft, gear teeth are fixed on the outer side wall of gear disc, gear teeth are fixed on the inner side wall of gear ring, first rotating shaft is arranged at the center of gear ring, gear disc is arranged in gear ring, gear disc is engaged with gear ring so that gear ring drives gear disc to rotate when mounting plate rotates, mounting seat is also fixed on the top of gear disc, grinding pot is detachably fixed in mounting seat, the utility model discloses grinding pot includes lower jar body, middle jar body and upper jar body and cover, lower jar body is detachably fixed in mounting seat, middle jar body is detachably fixed on the top of lower jar body, upper jar body is detachably fixed on the top of middle jar body;
[0009] Lower jar body is internally provided with vertically arranged cylindrical lower cavity, bottom inlet is formed in the top of lower jar body penetrating lower jar body, middle jar body is internally provided with vertically arranged cylindrical middle cavity, middle outlet larger than lower cavity is formed in the bottom of middle jar body, middle outlet is communicated with middle cavity and lower cavity and detachably installed with second screen, middle inlet is formed in the top of middle jar body penetrating middle jar body, and middle inlet is communicated with middle cavity and upper cavity;
[0010] Upper jar body is internally provided with vertically arranged cylindrical upper cavity, top outlet larger than middle cavity is formed in the bottom of upper jar body, top outlet is communicated with upper cavity and middle cavity and detachably installed with first screen, the mesh of first screen is larger than the mesh of second screen, top inlet is formed in the top of upper jar body penetrating upper jar body, and cover is detachably fixed on top inlet;
[0011] The diameter of upper cavity is larger than the diameter of middle cavity, and the diameter of middle cavity is larger than the diameter of lower cavity.
[0012] When the above scheme is used, the required suitable grinding balls are put into the upper jar body, the middle jar body and the lower jar body, and then the upper jar body, the middle jar body and the lower jar body are combined into the grinding jar, and the grinding jar is installed into the mounting seat. The driving mechanism is started, the driving mechanism drives the first rotating shaft to rotate, the first rotating shaft drives the mounting plate to rotate, the mounting plate drives the grinding jar to rotate, at the same time, the gear disc on the second rotating shaft is driven to rotate by the gear ring, the gear ring drives the mounting seat to rotate, the mounting seat drives the grinding jar to rotate, so that the direction of rotation of the grinding jar is opposite to the direction of rotation of the mounting plate, so that the grinding balls grind the soil. Under the same rotation time, the soil ground in the upper jar body that can pass through the first screen is obtained, the soil passing through the first screen enters the middle jar body and is continuously ground, the soil ground in the middle jar body that can pass through the second screen is obtained, and the soil passing through the second screen enters the lower jar body and is continuously ground. When the grinding time reaches, three soil samples with different particle sizes are obtained, and the operation of re-screening is omitted. At the same time, when the grinding jar is opened, the amount of soil in each jar body can be directly observed to determine whether the subsequent test requirements are met.
[0013] When different soil particle sizes are required, the specifications of the grinding balls and the specifications of the first screen and the second screen can be replaced, so as to quickly adjust the grinding precision of the device and adjust the soil particle size.
[0014] Further, the driving mechanism comprises a second support fixed on the bottom plate, and a motor fixed on the second support, and a driving wheel is arranged on the output shaft of the motor, and a driven wheel is fixedly arranged on the first rotating shaft, and the driving wheel and the driven wheel are in driving connection.
[0015] When the above scheme is used, the output shaft of the motor drives the driving wheel to rotate, the driving wheel drives the driven wheel to rotate, and the driven wheel drives the first rotating shaft to rotate.
[0016] Further, the outer walls of the upper jar body, the middle jar body and the lower jar body are cylindrical, and the outer walls of the upper jar body, the middle jar body and the lower jar body have the same diameter.
[0017] When the above scheme is used, the cylindrical upper jar body, the middle jar body and the lower jar body can obtain more stable rotational inertia, and meet the stability requirement of high-speed operation during grinding.
[0018] Further technical solutions are that a circular insertion slot with an upper end opening is formed in the mounting seat, the lower jar body is slidably inserted into the insertion slot from top to bottom, a bottom clamping groove extending to the top of the insertion slot is further formed in the side wall of the insertion slot, a first protrusion for being inserted into the bottom clamping groove is further arranged on the outer side wall of the lower jar body, a lower clamping groove extending to the top of the lower jar body is further formed in the outer side wall of the lower jar body, a second protrusion for being inserted into the lower clamping groove is further arranged on the bottom of the middle jar body, a middle clamping groove extending to the top of the middle jar body is further formed in the outer side wall of the middle jar body, a third protrusion for being inserted into the middle clamping groove is further arranged on the bottom of the upper jar body, an upper clamping groove extending to the top of the upper jar body is further formed in the outer side wall of the upper jar body, and a fourth protrusion for being inserted into the upper clamping groove is further arranged on the bottom of the cover, the first protrusion can only move up and down in the bottom clamping groove, the second protrusion can only move up and down in the lower clamping groove, the third protrusion can only move up and down in the middle clamping groove, and the fourth protrusion can only move up and down in the upper clamping groove, and the upper end of the tooth disc is further provided with a fastening mechanism for pressing down the cover.
[0019] When the above scheme is used, by arranging the bottom clamping groove, the lower clamping groove, the middle clamping groove and the upper clamping groove, and matching the first protrusion, the second protrusion, the third protrusion and the fourth protrusion, the installation of each jar body can be quickly positioned, and the disassembly between each jar body is facilitated.
[0020] Further technical solutions are that the fastening mechanism comprises a limiting plate fixedly arranged at the upper end of the tooth disc, the limiting plate has two limiting plates and is symmetrically arranged on both sides of the mounting seat, the fastening mechanism further comprises a screw sleeve, a screw rod is screwed through the screw sleeve, a top block is fixedly arranged at the bottom of the screw rod, a rotating handle is arranged at the top of the screw rod, two horizontal transverse rods are symmetrically arranged on the outer side wall of the screw sleeve, a sliding hole extending in the upward and downward directions is formed in the limiting plate, and the two transverse rods are slidably arranged in the sliding holes of the two limiting plates, respectively, and the screw rod and the top block are arranged above the cover.
[0021] When the above scheme is used, the screw rod is twisted, the screw rod drives the top block to move downward, the screw sleeve moves upward when the cover abuts against the top block after the screw rod is continuously twisted, the screw sleeve drives the transverse rods to move upward, until the top of the transverse rods abuts against the top of the sliding hole, under the action of the opposite force, the top block presses down the cover, so that the cover presses the grinding jar in the mounting seat.
[0022] Further technical solutions are that the first sieve screen comprises a first circular ring and an upper sieve screen, the inner side wall of the ejection opening is provided with an internal thread, the outer side wall of the first circular ring is provided with an external thread, the outer side wall of the first circular ring is screwed into the inner side wall of the ejection opening, the bottom of the first circular ring is flush with the bottom of the upper jar body, the bottom of the first circular ring abuts against the top of the middle jar body, and the upper sieve screen is fixedly arranged inside the first circular ring.
[0023] When the above scheme is used, by arranging the screw connection mode, the first sieve screen can be quickly replaced.
[0024] Further, the second screen includes a second circular ring and a lower screen, an inner side wall of the middle discharge port is provided with an internal thread, an outer side wall of the second circular ring is provided with an external thread, the outer side wall of the second circular ring is screwed in the inner side wall of the middle discharge port, a bottom of the second circular ring is flush with a bottom of the middle tank body, the bottom of the second circular ring abuts against a top of the lower tank body, and the lower screen is fixedly arranged in the second circular ring.
[0025] When the above scheme is used, the second screen can be quickly replaced by setting the screw connection mode.
[0026] Further, a bearing is fixedly arranged in the mounting plate, and the second rotating shaft is rotatably arranged in the bearing.
[0027] Further, the motor is a servo motor.
[0028] The utility model discloses the beneficial effect lies in:
[0029] 1. Efficient grinding and grading: through the design of multiple tank bodies (upper tank body, middle tank body and lower tank body) and screens, effective grading of soil is realized in a grinding process, additional screening operation is not needed, and work efficiency is greatly improved.
[0030] 2. Bidirectional rotary grinding: the grinding tank is driven by the mounting plate and the mounting seat to realize opposite rotation, the interaction between the grinding ball and the soil is enhanced, the grinding effect is improved, and the uniformity of soil particles is ensured.
[0031] 3. Flexible particle size adjustment: by simply replacing the grinding ball and the specifications of the first and second screens, the grinding precision and soil particle size can be quickly adjusted, and the diversified demand of soil particle size for different experiments or tests is met.
[0032] 4. Direct observation and monitoring: after the grinding tank is opened, the amount and state of the soil in each tank body can be directly observed, the grinding effect whether meeting the subsequent test demand can be judged in time, and the convenience and controllability of operation are enhanced.
[0033] 5. Time and labor saving: the grinding and screening functions are integrated, the step of multiple screening in the traditional method is reduced, time is saved, and the overall work efficiency is improved. DETAILED DESCRIPTION
[0034] Figure 1 It is a general schematic view of the utility model;
[0035] Figure 2 It is Figure 1 It is an enlarged view of A in the middle;
[0036] Figure 3 It is a top view of the utility model;
[0037] Figure 4 is a side view of the device; Figure 1
[0038] Figure 5 is a schematic view of a limiting plate on one side of the hidden part in the middle; Figure 4
[0039] Figure 6 is a top view of the lower jar body;
[0040] Figure 7 is a top view of the middle jar body;
[0041] Figure 8 is a top view of the upper jar body.
[0042] In the figure, 1, bottom plate, 2, first support, 3, gear ring, 4, shaft seat, 5, first rotating shaft, 6, driven wheel, 7, second support, 8, motor, 9, mounting plate, 10, bearing, 11, second rotating shaft, 12, gear disc, 13, mounting seat, 14, limiting plate, 15, lower jar body, 16, middle jar body, 17, upper jar body, 18, cover, 19, top block, 20, screw rod, 21, screw sleeve, 22, cross rod, 23, rotating handle, 24, sliding hole, 25, first protruding block, 26, upper cavity, 27, top feeding port, 28, top discharging port, 29, first circular ring, 30, upper screen, 31, middle cavity, 32, middle feeding port, 33, middle discharging port, 34, second circular ring, 35, lower screen, 36, bottom feeding port, 37, lower cavity, 38, driving wheel, 39, lower clamping groove, 40, second protruding block, 41, middle clamping groove, 42, third protruding block, 43, upper clamping groove, 44, fourth protruding block, 45, bottom clamping groove. DETAILED DESCRIPTION
[0043] In order to better understand the technical content of the utility model, the following specific embodiments are provided, and the utility model is further described in combination with the drawings.
[0044] Referring to Figures 1 to 8 A grinding device for adjusting soil particle size comprises a bottom plate 1, a shaft seat 4, a first support 2 and a driving mechanism arranged at the upper end of the bottom plate 1.
[0045] The shaft seat 4 is vertically inserted and mounted with the first rotating shaft 5 through the bearing 10 arranged in the shaft seat 4, and the first rotating shaft 5 is driven by the driving mechanism.
[0046] Specifically, the driving mechanism comprises a second support 7 fixed on the bottom plate 1, and a motor 8 fixed on the second support 7, wherein the output shaft of the motor 8 is provided with a driving wheel 38, and the first rotating shaft 5 is further fixedly sleeved with a driven wheel 6, and the driving wheel 38 is driven by the driven wheel 6.
[0047] Preferably, the motor 8 is a servo motor 8.
[0048] Preferably, the driving wheel 38 and the driven wheel 6 are both belt pulleys, and the two are connected and driven by a belt.
[0049] The first rotating shaft 5 is horizontally fixed at the top with a mounting plate 9, and two second rotating shafts 11 are vertically mounted on the mounting plate 9 and symmetrically arranged with the first rotating shaft 5 as the center.
[0050] Preferably, bearings 10 are fixedly embedded in the mounting plate 9, and the second rotating shafts 11 are rotatably arranged in the bearings 10.
[0051] The first rotating shaft 5 is horizontally fixed at the top with a gear disc 12, the outer side wall of which is fixed with gear teeth, and the first support 2 is horizontally fixed with a gear ring 3, the inner side wall of which is fixed with gear teeth, the first rotating shaft 5 is arranged at the center of the gear ring 3, and the gear disc 12 is arranged in the gear ring 3, the gear disc 12 is engaged with the gear ring 3 so that when the mounting plate 9 rotates, the gear ring 3 drives the gear disc 12 to rotate.
[0052] The gear disc 12 is further fixed at the top with a mounting seat 13, in which a grinding pot is detachably fixedly installed, the grinding pot comprises a lower pot body 15, a middle pot body 16, an upper pot body 17 and a cover 18, the lower pot body 15 is detachably fixedly installed in the mounting seat 13, the middle pot body 16 is detachably fixedly installed at the top of the lower pot body 15, and the upper pot body 17 is detachably fixedly installed at the top of the middle pot body 16.
[0053] Specifically, the mounting seat 13 is internally provided with a circular insertion slot with an upper end opening, the lower pot body 15 is slidably inserted in the insertion slot from top to bottom, the side wall of the insertion slot of the mounting seat 13 is further provided with a bottom clamping groove 45 extending to the top of the insertion slot, the outer side wall of the lower pot body 15 is further provided with a first protrusion 25 for insertion into the bottom clamping groove 45, the outer side wall of the lower pot body 15 is further provided with a lower clamping groove 39 extending to the top of the lower pot body 15, the bottom of the middle pot body 16 is further fixed with a second protrusion 40 for insertion into the lower clamping groove 39, the outer side wall of the middle pot body 16 is further provided with a middle clamping groove 41 extending to the top of the middle pot body 16, the bottom of the upper pot body 17 is further fixed with a third protrusion 42 for insertion into the middle clamping groove 41, the outer side wall of the upper pot body 17 is further provided with an upper clamping groove 43 extending to the top of the upper pot body 17, and the bottom of the cover 18 is further fixed with a fourth protrusion 44 for insertion into the upper clamping groove 43, the first protrusion 25 can only move up and down in the bottom clamping groove 45, the second protrusion 40 can only move up and down in the lower clamping groove 39, the third protrusion 42 can only move up and down in the middle clamping groove 41, the fourth protrusion 44 can only move up and down in the upper clamping groove 43, and the upper end of the gear disc 12 is further provided with a fastening mechanism for pressing down the cover 18.
[0054] Specifically, the fastening mechanism includes a limiting plate 14 fixed on the upper end of the gear disc 12, the limiting plate 14 has two and is symmetrically arranged on both sides of the mounting seat 13, the fastening mechanism further includes a threaded sleeve 21, a threaded rod 20 is screwed through the threaded sleeve 21, the bottom of the threaded rod 20 is fixed with a top block 19, the top of the threaded rod 20 is provided with a rotating handle 23, two horizontal transverse rods 22 are symmetrically arranged on the outer side wall of the threaded sleeve 21, a sliding hole 24 extending in the upward and downward direction is formed in the limiting plate 14, the two transverse rods 22 are respectively slidably arranged in the sliding hole 24 of the limiting plate 14, and the threaded rod 20 and the top block 19 are arranged above the cover 18.
[0055] A lower cavity 37 in the shape of a vertical cylinder is formed in the inside of the lower jar body 15, the top of the lower cavity 37 penetrates the top of the lower jar body 15 to form a bottom feed inlet 36, a middle cavity 31 in the shape of a vertical cylinder is formed in the inside of the middle jar body 16, a middle discharge outlet 33 larger than the lower cavity 37 is formed in the bottom of the middle jar body 16, the middle discharge outlet 33 is connected with the middle cavity 31 and the lower cavity 37 and is detachably provided with a second screen, and the top of the middle cavity 31 penetrates the top of the middle jar body 16 to form a middle feed inlet 32.
[0056] Specifically, the second screen includes a second circular ring 34 and a lower screen 35, the inner side wall of the middle discharge outlet 33 is provided with an internal thread, the outer side wall of the second circular ring 34 is provided with an external thread, the outer side wall of the second circular ring 34 is screwed in the inner side wall of the middle discharge outlet 33, the bottom of the second circular ring 34 is flush with the bottom of the middle jar body 16, the bottom of the second circular ring 34 abuts against the top of the lower jar body 15, and the lower screen 35 is fixed in the inside of the second circular ring 34.
[0057] An upper cavity 26 in the shape of a vertical cylinder is formed in the inside of the upper jar body 17, a top discharge outlet 28 larger than the middle cavity 31 is formed in the bottom of the upper jar body 17, the top discharge outlet 28 is connected with the upper cavity 26 and the middle cavity 31 and is detachably provided with a first screen, the mesh of the first screen is larger than that of the second screen, the top of the upper cavity 26 penetrates the top of the upper jar body 17 to form a top feed inlet 27, and the cover 18 is detachably fixed on the top feed inlet 27.
[0058] Specifically, the first screen includes a first circular ring 29 and an upper screen 30, the inner side wall of the top discharge outlet 28 is provided with an internal thread, the outer side wall of the first circular ring 29 is provided with an external thread, the outer side wall of the first circular ring 29 is screwed in the inner side wall of the top discharge outlet 28, the bottom of the first circular ring 29 is flush with the bottom of the upper jar body 17, the bottom of the first circular ring 29 abuts against the top of the middle jar body 16, and the upper screen 30 is fixed in the inside of the first circular ring 29. The mesh of the upper screen 30 is larger than that of the lower screen 35.
[0059] The diameter of the upper cavity 26 is larger than that of the middle cavity 31, and the diameter of the middle cavity 31 is larger than that of the lower cavity 37.
[0060] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A grinding device for conditioning soil particle size, characterised in that: The device includes a base plate, a bearing seat, a first bracket, and a drive mechanism located on the upper part of the base plate. A first rotating shaft is rotatably and vertically mounted in the bearing seat and is driven by the drive mechanism. A mounting plate is horizontally fixed on the top of the first rotating shaft. Two second rotating shafts are rotatably and vertically mounted on the mounting plate, symmetrically arranged with the first rotating shaft as the center. A gear plate is horizontally fixed on the top of the first rotating shaft, and gear teeth are fixed on the outer wall of the gear plate. A gear ring is horizontally fixed on the first bracket, and gear teeth are fixed on the inner wall of the gear ring. The first rotating shaft is located at the center of the gear ring, and the gear plate is located inside the gear ring. The gear plate meshes with the gear ring, so that when the mounting plate rotates, the gear ring drives the gear plate to rotate. A mounting seat is also fixed on the top of the gear plate. A grinding jar is detachably and fixedly mounted in the mounting seat. The grinding jar includes a lower jar body, a middle jar body, an upper jar body, and a cover. The lower jar body is detachably and fixedly mounted in the mounting seat, the middle jar body is detachably and fixedly mounted on the top of the lower jar body, and the upper jar body is detachably and fixedly mounted on the top of the middle jar body. The lower tank has a vertically arranged cylindrical lower cavity inside, and the top of the lower cavity passes through the top of the lower tank to form a bottom feed port. The middle tank has a vertically arranged cylindrical middle cavity inside, and the bottom of the middle tank has a middle discharge port that is larger than the lower cavity. The middle discharge port connects the middle cavity and the lower cavity and is detachably equipped with a second screen. The top of the middle cavity passes through the top of the middle tank to form a middle feed port. The upper tank has a vertically arranged cylindrical upper cavity inside. The bottom of the upper tank has a discharge port that is larger than that of the middle cavity. The discharge port connects the upper cavity and the middle cavity and is detachably equipped with a first screen. The screen holes of the first screen are larger than those of the second screen. The top of the upper cavity passes through the top of the upper tank to form a top feed port. The cap is detachably fixed to the top feed port. The diameter of the upper cavity is larger than that of the middle cavity, and the diameter of the middle cavity is larger than that of the lower cavity.
2. The grinding device for adjusting soil particle size according to claim 1, characterized in that: The drive mechanism includes a second bracket fixed on the base plate, and a motor fixed on the second bracket. The output shaft of the motor is provided with a drive wheel, and a driven wheel is fixedly sleeved on the first rotating shaft. The drive wheel and the driven wheel are driven together.
3. A grinding device for adjusting soil particle size as claimed in claim 2, wherein: The outer walls of the upper, middle, and lower tanks are all cylindrical, and the outer wall diameters of the upper, middle, and lower tanks are the same.
4. A grinding device for adjusting soil particle size as claimed in claim 3, wherein: The mounting base has a circular slot with an opening at the top. The lower can slides into the slot from top to bottom. The side wall of the slot on the mounting base also has a bottom slot extending to the top of the slot. The outer wall of the lower can also has a first protrusion for inserting into the bottom slot. The outer wall of the lower can also has a lower slot extending to the top of the lower can. The bottom of the middle can is fixed with a second protrusion for inserting into the lower slot. The outer wall of the middle can also has a middle slot extending to the top of the middle can. The bottom of the upper can is fixed with a third protrusion for inserting into the middle slot. The outer wall of the upper can also has an upper slot extending to the top of the upper can. The bottom of the cap is fixed with a fourth protrusion for inserting into the upper slot. The first protrusion can only move up and down in the bottom slot, the second protrusion can only move up and down in the lower slot, the third protrusion can only move up and down in the middle slot, and the fourth protrusion can only move up and down in the upper slot. The upper end of the gear plate is also provided with a fastening mechanism for pressing down the cap.
5. A grinding device for adjusting soil particle size as claimed in claim 4, wherein: The fastening mechanism comprises two limiting plates fixed on the ends of the gear disc and symmetrically arranged on the two sides of the mounting seat, and further comprises a screw sleeve in which a screw rod is screwed through, the bottom of the screw rod is fixed with a top block, the top of the screw rod is provided with a rotating handle, two horizontal cross bars are symmetrically arranged on the outer side wall of the screw sleeve, two sliding holes extending in the up-down direction are formed in the limiting plates, the two cross bars are respectively slidably arranged in the sliding holes of the two limiting plates, and the screw rod and the top block are arranged above the cover.
6. A grinding device for adjusting soil particle size as claimed in claim 5, wherein: The first sieve screen comprises a first circular ring and an upper sieve screen, the inner side wall of the ejection port is provided with an internal thread, the outer side wall of the first circular ring is provided with an external thread, the outer side wall of the first circular ring is screwed in the inner side wall of the ejection port, the bottom of the first circular ring is flush with the bottom of the upper tank body, the bottom of the first circular ring abuts against the top of the middle tank body, and the upper sieve screen is fixedly arranged in the first circular ring.
7. The grinding device for adjusting soil particle size according to claim 5, wherein: The second sieve screen comprises a second circular ring and a lower sieve screen, the inner side wall of the middle ejection port is provided with an internal thread, the outer side wall of the second circular ring is provided with an external thread, the outer side wall of the second circular ring is screwed in the inner side wall of the middle ejection port, the bottom of the second circular ring is flush with the bottom of the middle tank body, the bottom of the second circular ring abuts against the top of the lower tank body, and the lower sieve screen is fixedly arranged in the second circular ring.
8. The grinding device for adjusting soil particle size according to claim 1, wherein: The bearing is fixedly arranged in the mounting plate, and the second rotating shaft is rotatably arranged in the bearing.
9. The grinding device for adjusting soil particle size according to claim 2, characterized in that: The motor is a servo motor.