Granularity detection device for compound microbial fertilizer

Abstract

The invention discloses a composite microbial fertilizer particle size detection device, which belongs to the field of fertilizer detection, and is characterized in that three screening areas, namely a central screening area, an inner ring screening area and an outer ring screening area, are formed at the top of a bottom plate; the effect that one bottom plate has the effect of screening three kinds of compound microorganism fertilizer particles with different particle sizes is achieved, the use amount of sieve plates is reduced, the probability of occupying the laboratory space is reduced, meanwhile, hole diameter adjusting mechanisms are installed at the bottoms of first through holes of the center screening area and the inner ring screening area, and the diameter of an inner channel of a ring base is changed; and in the period, sieve plates with different sieve hole diameters do not need to be replaced, adjustment is convenient, and the situation that part of the sieve plates with the sieve hole diameters are lost is avoided.

Description

Technical Field

[0001] The invention relates to the field of fertilizer detection, and more specifically to a composite microbial fertilizer particle size detection device. Background Art

[0002] Compound microbial fertilizer is a new type of fertilizer that combines a variety of beneficial microorganisms with organic and inorganic fertilizers. Its particle size has an important impact on the fertilizer application effect, storage stability, and mixing uniformity during production and processing. Therefore, accurate detection of the particle size of compound microbial fertilizer has become a key step in fertilizer production and quality control.

[0003] Among the existing particle size detection equipment, the rotary vibrating screen is one of the more commonly used equipment. The rotary vibrating screen uses the exciting force generated by the vibration motor to make the screen body gyrate, and the material moves outward in a spiral shape on the screen surface, thereby achieving the screening of particles of different particle sizes.

[0004] However, in order to achieve the effect of screening different particle sizes, the existing rotary vibrating screen needs to set up multiple sieve plates with different sieve hole diameters for use, and the sieve hole diameter of each sieve plate cannot be adjusted, which is inconvenient to use. When facing the particle size detection of compound microbial fertilizers with different specifications, it is often necessary to frequently replace the sieve plate, which not only increases the time cost of the detection, but also reserves a variety of sieve plates with different sieve hole diameters in some small laboratories. It undoubtedly increases the space occupied by the sieve plate, and even some sieve plates with sieve hole diameters are lost. Therefore, it is necessary to develop a new type of compound microbial fertilizer particle size detection device to overcome the above-mentioned problems existing in the existing rotary vibrating screen during the particle size detection process. Summary of the invention

[0005] 1. Technical problems to be solved

[0006] In view of the problems existing in the prior art, the object of the present invention is to provide a composite microbial fertilizer particle size detection device, which first separates the top of the bottom plate of the barrel by an inner spacer ring and an outer spacer ring, so that three screening areas of a central screening area, an inner ring screening area and an outer ring screening area are formed on the top of the bottom plate, so as to meet the effect of screening three kinds of composite microbial fertilizer particles with different particle sizes on one bottom plate, reduce the use of the sieve plate and reduce the probability of occupying laboratory space; at the same time, the bottom of the through hole one of the central screening area and the inner ring screening area is equipped with an aperture adjustment mechanism, which can drive the threaded nail to rise and fall when the adjusting nut is rotated, and then drive the lifting of the support plate one or the support plate two, so as to promote the lifting of the conical support seat on the support plate one or the support plate two, squeeze or release the ball head seat at one end of the slide rod, so as to achieve the effect of controlling the other end of the slide rod to extend or retract into the inside of the ring seat, change the diameter of the internal channel of the ring seat, and then achieve the effect of controlling the sieve hole diameter and the smooth screening of composite microbial fertilizer particles of different particle sizes, and there is no need to replace the sieve plates with different sieve hole diameters, and the adjustment is convenient, so as to avoid the loss of the sieve plates with some sieve hole diameters.

[0007] 2. Technical solution

[0008] To solve the above problems, the present invention adopts the following technical solutions.

[0009] A composite microbial fertilizer particle size detection device comprises a material barrel, wherein an upper cover and a bottom plate are fixedly installed on the top and bottom of the material barrel respectively, and a granular biofertilizer feed port is opened at the center of the top of the upper cover;

[0010] An inner spacer ring and an outer spacer ring are fixedly welded on the bottom plate, and the bottom plate is divided into a central screening area, an inner ring screening area and an outer ring screening area by the inner spacer ring and the outer spacer ring, and the inner spacer ring, the outer spacer ring and the outer side of the barrel are respectively provided with a first connecting opening, a second connecting opening and a third connecting opening;

[0011] The bottom plate located on the central screening area and the inner ring screening area is provided with a plurality of through holes 1, and a support plate 1 and a support plate 2 are arranged at the bottom of the bottom plate corresponding to the positions of the central screening area and the inner ring screening area, and a plurality of through holes 2 are provided on the support plate 1 and the support plate 2 corresponding to the positions of the through holes 1, and the corresponding through holes 1 and the through holes 2 are connected by an aperture adjustment mechanism, and the outer edge bottom of the support plate 1 and the inner edge top of the support plate 2 are fixed and pasted by an elastic rubber ring, and a group of threaded pins are fixedly welded to the top of the support plate 1 and the support plate 2 respectively, and connecting holes are provided on the bottom plate at the positions of the threaded pins, and the tops of the threaded pins penetrate into the corresponding connecting holes, and the tops of the threaded pins are threadedly connected with adjusting nuts.

[0012] Furthermore, the aperture adjustment mechanism includes a ring seat fixedly installed at the bottom of the through hole one by screws, the ring seat is fixedly welded inside the ring seat by a group of cross bars, the internal channel of the ring seat coincides with the inside of the through hole one, and no less than 4 sliding holes one are equidistantly opened on the ring seat, and a sliding hole two is opened on the ring seat corresponding to the position of the sliding hole one, and the corresponding sliding hole one and sliding hole two are connected by a sliding rod, and a limiting end is fixedly welded at the end of the sliding rod located inside the ring seat, a lower bent section is fixedly welded at the end of the sliding rod located outside the ring seat, and a ball head seat is fixedly installed at the bottom end of the lower bent section, and a limiting plate is fixedly welded on the sliding rod located at the connection between the end of the sliding rod and the lower bent section, and a support spring is sleeved on the sliding rod, and the two ends of the support spring are respectively in contact with the inner side of the limiting plate and the outer side of the sliding hole one.

[0013] Furthermore, the aperture adjustment mechanism also includes a conical bracket fixedly installed on the top of the second through hole by screws, the top of the conical bracket is a conical ring cover structure, the bottom channel inside the conical bracket coincides with the inside of the second through hole, and the balls of no less than 4 ball head seats are all in contact with the inner wall of the conical bracket.

[0014] Furthermore, a conical material discharge cover 1 is fixedly welded to the bottom of the support plate 1, and a hose mounting end 1 is fixedly welded to the bottom of the conical material discharge cover 1, a discharge cover 2 is fixedly welded to the bottom of the support plate 2, the discharge cover 2 is made by fixing and welding a conical cover on the outside and a cylindrical material discharge barrel bottom on the inside through a sealing plate, a hose mounting end 2 is fixedly welded to the bottom of the sealing plate at the bottom of the second discharge cover, avoidance openings are provided on the conical cover and the cylindrical material discharge barrel, a discharge hose 1 is fixedly mounted on the hose mounting end 1, and the other end of the discharge hose 1 extends to the outside of the conical cover through the two avoidance openings, a discharge hose 2 is fixedly mounted on the hose mounting end 2, and a discharge hose 3 is fixedly mounted on the connecting opening 3.

[0015] Furthermore, the central screening zone and the inner ring screening zone are connected via the connecting opening one, the inner ring screening zone and the outer ring screening zone are connected via the connecting opening two, and the outer ring screening zone and the outer side of the barrel are connected via the connecting opening three.

[0016] Furthermore, a lower ring is fixedly welded to the bottom of the barrel via a plurality of columns, a base is fixedly installed to the bottom of the lower ring via a plurality of connecting springs, a support frame is fixedly welded inside the lower ring, a drive motor is fixedly installed at the center position of the bottom of the support frame, a drive shaft at the top of the drive motor passes through the top of the support frame, and an eccentric block is fixedly installed at the end of the drive shaft at the top of the drive motor.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] (1) In this scheme, the top of the bottom plate of the barrel is first separated by an inner spacer ring and an outer spacer ring, so that three screening areas are formed on the top of the bottom plate, namely, a central screening area, an inner ring screening area, and an outer ring screening area, so that one bottom plate can screen three kinds of composite microbial fertilizer particles with different particle sizes, thereby reducing the use of the sieve plate and the probability of occupying laboratory space;

[0020] (2) In this scheme, the bottom of the through hole 1 of the central screening area and the inner ring screening area are both installed with an aperture adjustment mechanism, which can drive the threaded nail to rise and fall when the adjusting nut is turned, thereby driving the first or second support plate to rise and fall, causing the conical support seat on the first or second support plate to rise and fall, squeezing or releasing the ball head seat at one end of the slide rod, thereby achieving the effect of controlling the other end of the slide rod to extend or retract into the inside of the ring seat, changing the diameter of the internal channel of the ring seat, and thereby achieving the effect of controlling the sieve hole diameter and the smooth screening of composite microbial fertilizer particles of different particle sizes. During this period, there is no need to replace sieve plates with different sieve hole diameters, and the adjustment is convenient, avoiding the loss of sieve plates with some sieve hole diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the internal structure of the barrel of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the aperture adjustment mechanism of the present invention;

[0024] Figure 4 It is a schematic diagram of the split structure of the aperture adjustment mechanism of the present invention;

[0025] Figure 5 For the present invention Figure 4 A schematic diagram of the structure of the enlarged part of the middle area;

[0026] Figure 6 It is a schematic diagram of the structure of the inner spacer ring and the outer spacer ring of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the support plate 1 and the support plate 2 of the present invention;

[0028] Figure 8 It is a schematic diagram of the sleeve connection of the conical material discharge cover 1 and the conical material discharge cover 2 of the present invention;

[0029] Fig. 9 It is a schematic diagram of the contact between the ball head seat and the inner wall of the conical bracket of the present invention;

[0030] Fig.10It is a schematic diagram of the sliding rod structure of the present invention.

[0031] Description of the numbers in the figure:

[0032] 1. Material barrel; 2. Upper cover; 201. Granular biofertilizer feed port; 3. Bottom plate; 301. Center screening area; 302. Inner ring screening area; 303. Outer ring screening area; 304. Connecting opening three; 305. Through hole one; 306. Connecting hole; 4. Inner spacer ring; 401. Connecting opening one; 5. Outer spacer ring; 501. Connecting opening two; 6. Support plate one; 601. Through hole two; 7. Support plate two;

[0033] 8. Aperture adjustment mechanism; 801. Ring seat; 8011. Sliding hole 1; 802. Ring seat; 8021. Sliding hole 2; 803. Sliding rod; 8031. Limiting end; 8032. Lower bend section; 8033. Ball head seat; 8034. Limiting piece; 8035. Support spring; 804. Conical bracket; 805. Conical feed cover 1; 8051. Hose mounting end 1; 806. Feed cover 2; 8061. Hose mounting end 2; 8062. Avoidance opening; 9. Elastic rubber ring; 10. Threaded nail;

[0034] 11. Feeding hose 1; 12. Feeding hose 2; 13. Feeding hose 3; 14. Lower ring; 15. Connecting spring; 16. Base; 17. Support frame; 18. Driving motor; 19. Eccentric block. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the specification of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0036] Embodiment 1:

[0037] See also Figure 1-Figure 4 A composite microbial fertilizer particle size detection device comprises a material barrel 1, an upper cover 2 and a bottom plate 3 are respectively fixedly mounted on the top and bottom of the material barrel 1, and a granular biofertilizer feed port 201 is opened at the center of the top of the upper cover 2;

[0038] An inner spacer ring 4 and an outer spacer ring 5 are fixedly welded on the bottom plate 3, and the bottom plate 3 is divided into a central screening area 301, an inner ring screening area 302 and an outer ring screening area 303 by the inner spacer ring 4 and the outer spacer ring 5, and a connecting opening 1 401, a connecting opening 2 501 and a connecting opening 3 304 are respectively opened on the inner spacer ring 4, the outer spacer ring 5 and the outer side of the barrel 1;

[0039] A plurality of through holes 1 305 are provided on the bottom plate 3 located on the central screening area 301 and the inner ring screening area 302, and a support plate 1 6 and a support plate 2 7 are provided on the bottom of the bottom plate 3 at the positions of the corresponding central screening area 301 and the inner ring screening area 302, and a plurality of through holes 2 601 are provided on the support plate 1 6 and the support plate 2 7 at the positions of the corresponding through holes 1 305, and the corresponding through holes 1 305 and the through holes 2 601 are connected by an aperture adjustment mechanism 8, and the bottom of the outer edge of the support plate 1 6 and the top of the inner edge of the support plate 2 7 are fixedly adhered by an elastic rubber ring 9, and a group of threaded pins 10 are fixedly welded on the tops of the support plates 1 6 and the support plates 2 7, respectively, and a connecting hole 306 is provided on the bottom plate 3 at the positions of the corresponding threaded pins 10, and the tops of the threaded pins 10 penetrate into the corresponding connecting holes 306, and the tops of the threaded pins 10 are threadedly connected with adjusting nuts;

[0040] A lower ring 14 is fixedly welded to the bottom of the barrel 1 through a plurality of columns, a base 16 is fixedly installed at the bottom of the lower ring 14 through a plurality of connecting springs 15, a support frame 17 is fixedly welded inside the lower ring 14, a drive motor 18 is fixedly installed at the center position of the bottom of the support frame 17, a drive shaft at the top of the drive motor 18 passes through the top of the support frame 17, and an eccentric block 19 is fixedly installed at the end of the drive shaft at the top of the drive motor 18.

[0041] (I) The screening principle of the composite microbial fertilizer particle size detection device is:

[0042] First, a set of adjusting nuts on the central screening area 301 and the inner ring screening area 302 are used to adjust the rising and falling distances of the support plate 1 6 and the support plate 2 7 respectively, thereby controlling the telescopic length of one end of the slide bar 803 of the aperture adjustment mechanism 8 inside the ring seat 802, so as to achieve the effect of adjusting and controlling the sieve hole diameter inside the through hole 1 305 on the central screening area 301 and the inner ring screening area 302, so that the composite microbial fertilizer particles can pass smoothly, and then the composite microbial fertilizer to be tested is preliminarily screened with a fine screen to remove the residual composite microbial fertilizer powder inside, leaving only the granular material of the composite microbial fertilizer, and then the device can be started, and the granular material of the composite microbial fertilizer is added to the inside of the barrel 1 through the granular biofertilizer feed port 201;

[0043] At this time, the driving motor 18 drives the eccentric block 19 to rotate. Since the lower ring 14 at the bottom of the barrel 1 is fixedly installed with the top of the base 16 through a plurality of connecting springs 15, the driving motor 18 can drive the barrel 1 as a whole to perform a gyratory motion when it is started. At this time, the granular material of the composite microbial fertilizer in the central screening area 301 will diffuse outward in a spiral shape on the bottom plate 3. The granular material of the composite microbial fertilizer with the smallest particle size will be screened out in the central screening area 301 and discharged through the feeding hose 1 11. The granular material of the composite microbial fertilizer with a medium particle size will be screened out in the inner ring screening area 302 and discharged through the feeding hose 2 12. The granular material of the composite microbial fertilizer with the largest particle size will be collected at the communicating opening 3 304 through the outer ring screening area 303 and discharged through the feeding hose 3 13.

[0044] Finally, the granular materials of the compound microbial fertilizer collected by the feeding hose 11, the feeding hose 2 12 and the feeding hose 3 13 can be weighed, so as to calculate the proportion of the weight of the granular materials of the compound microbial fertilizer collected by each feeding hose to the total weight collected by the three feeding hoses, thereby achieving the effect of detecting and calculating different particle sizes of the compound microbial fertilizer.

[0045] Embodiment 2:

[0046] In view of the above embodiment 1, for further description, refer to Figure 2-Figure 10 The aperture adjustment mechanism 8 includes a ring seat 801 fixedly mounted at the bottom of the through hole 1 305 by screws, a ring seat 802 is fixedly welded inside the ring seat 801 by a set of cross bars, the internal channel of the ring seat 802 coincides with the inside of the through hole 1 305, and the ring seat 801 is provided with a number of not less than 4 sliding holes 1 8011 at equal intervals, and the ring seat 802 is provided with a sliding hole 2 8021 at the position of the corresponding sliding hole 1 8011, and the corresponding sliding hole 1 8011 and the sliding hole 2 8021 are connected by a sliding rod 803, and the ring seat 80 The end of the sliding rod 803 inside is fixedly welded with a limited end 8031, the end of the sliding rod 803 outside the ring seat 801 is fixedly welded with a lower curved section 8032, and the bottom end of the lower curved section 8032 is fixedly installed with a ball head seat 8033, and the sliding rod 803 at the connection between the end of the sliding rod 803 and the lower curved section 8032 is fixedly welded with a limited plate 8034, and the sliding rod 803 is sleeved with a support spring 8035, and the two ends of the support spring 8035 are respectively in contact with the inner side of the limited plate 8034 and the outer side of the sliding hole 1 8011;

[0047] The aperture adjustment mechanism 8 also includes a conical support seat 804 fixedly mounted on the top of the second through hole 601 by screws, the top of the conical support seat 804 is a conical ring cover structure, the bottom channel inside the conical support seat 804 coincides with the inside of the second through hole 601, and the balls of the ball head seats 8033, which are not less than 4 in number, are all in contact with the inner wall of the conical support seat 804;

[0048] A conical material discharge cover 805 is fixedly welded to the bottom of the support plate 6, and a hose mounting end 8051 is fixedly welded to the bottom of the conical material discharge cover 805, a discharge cover 806 is fixedly welded to the bottom of the support plate 7, and the discharge cover 806 is made of a conical cover on the outside and a cylindrical discharge barrel bottom on the inside, which are fixedly welded through a sealing plate, a hose mounting end 8061 is fixedly welded to the bottom of the sealing plate at the bottom of the discharge cover 806, and both the conical cover and the cylindrical discharge barrel are provided with an avoidance opening 8062, a discharge hose 11 is fixedly installed on the hose mounting end 8051, and the other end of the discharge hose 11 extends to the outside of the conical cover through two avoidance openings 8062, a discharge hose 12 is fixedly installed on the hose mounting end 8061, and a discharge hose 3 13 is fixedly installed on the connecting opening 304.

[0049] (II) The working principle of the aperture adjustment mechanism of the composite microbial fertilizer particle size detection device is:

[0050] When it is necessary to adjust the passages through which the composite microbial fertilizer granular materials of corresponding particle sizes in the central screening area 301 and the plurality of through holes 305 can pass, it is only necessary to rotate the two adjusting nuts on the central screening area 301 to drive the two threaded pins 10 to move up and down, thereby driving the support plate 6 to move up and down, and at this time, the conical support seat 804 installed on the support plate 6 can be lifted and lowered;

[0051] When the conical support seat 804 rises, the inner wall of the conical support seat 804 can be urged to squeeze the ball head seats 8033, which are not less than 4 in number, and the slide bar 803 can be squeezed toward the ring seat 802, thereby increasing the length of one end of the slide bar 803 with the limiting end 8031 ​​inside the ring seat 802. At this time, the channel diameter inside the ring seat 802 becomes smaller, so that only the composite microbial fertilizer granular materials with smaller particle sizes pass through the through hole 1 305, the inside of the ring seat 802 and the through hole 2 601, and then enter the inside of the conical discharge cover 1 805, and are discharged through the discharge hose 11;

[0052] On the contrary, when the conical support seat 804 descends, the inner wall of the conical support seat 804 can release the squeezing force on the ball head seats 8033, which are not less than 4 in number. At this time, the slide bar 803 is forced to move in the opposite direction of the ring seat 802 by the rebound support of the support spring 8035, thereby reducing the length of one end of the slide bar 803 with the limited end 8031 ​​inside the ring seat 802. At this time, the channel diameter inside the ring seat 802 becomes larger, so that only the composite microbial fertilizer granular materials with larger particle sizes pass through the through hole 1 305, the inside of the ring seat 802 and the through hole 2 601, and then enter the inside of the conical discharge cover 1 805, and are discharged through the discharge hose 11;

[0053] Finally, the channel diameter inside the ring seat 802 is adjusted to meet the granular material of the composite microbial fertilizer with the required particle size, and then the channel diameters at the inner ring screening area 302, the bottom of the plurality of through holes 305, and the inner ring seat 802 can be adjusted. The specific adjustment principle is as described above, until the channel diameter inside the ring seat 802 is adjusted to meet the use requirements, and the channel diameter inside the ring seat 802 on the inner ring screening area 302 is larger than the channel diameter inside the ring seat 802 on the central screening area 301, so as to meet the effect of increasing the particle size step by step.

[0054] The granular material of the composite microbial fertilizer that passes through the through hole 1 305, the inside of the ring seat 802 and the through hole 2 601 on the inner ring screening partition 302 will fall into the inside of the discharge cover 2 806, and then can be discharged through the discharge hose 2 12. Finally, the granular material of the composite microbial fertilizer with the largest particle size can be discharged through the discharge hose 3 13 connected to the connecting opening 304 on the outer ring screening partition 303.

[0055] Embodiment 3:

[0056] In view of the above-mentioned embodiment 1 and embodiment 2, for further description, refer to Figure 4 , through the structural design that the central screening zone 301 and the inner ring screening zone 302 are connected through the connecting opening 1 401, the inner ring screening zone 302 and the outer ring screening zone 303 are connected through the connecting opening 2 501, and the outer ring screening zone 303 and the outer side of the barrel 1 are connected through the connecting opening 3 304, the granular material of the composite microbial fertilizer can be first vibrated and screened inside the central screening zone 301, then enter the inner ring screening zone 302 through the connecting opening 1 401 for vibration screening, and finally enter the outer ring screening zone 303 through the connecting opening 2 501;

[0057] The structural design of fixing and pasting the bottom of the outer edge of the support plate 1 6 and the top of the inner edge of the support plate 2 7 with an elastic rubber ring 9 can improve the sealing of the connection between the support plate 1 6 and the support plate 2 7 without interfering with the height adjustment between the support plate 1 6 and the support plate 2 7, thereby avoiding interference;

[0058] The structural design of fixing and welding the limited end 8031 ​​at the end of the slide bar 803 located inside the ring seat 802 can prevent the end of the slide bar 803 located inside the ring seat 802 from falling off when moving;

[0059] The end of the slide bar 803 located outside the ring seat 801 is fixedly welded with a downward curved section 8032, and the bottom end of the downward curved section 8032 is fixedly mounted with a ball head seat 8033, so that the portion where the end of the slide bar 803 contacts the inner wall of the conical support seat 804 can be as close to the bottom as possible, thereby reducing the probability of interference between the conical support seat 804 and the bottom of the bottom plate 3 when the conical support seat 804 rises;

[0060] The opening of the avoidance opening 8062 facilitates the extension of the discharge hose 11 to the outside, and the hose structure design of the discharge hose 11 prevents the discharge hose 11 from interfering with the discharge hose 11 at the position of the avoidance opening 8062 when the misaligned movement of the support plate 1 6 and the support plate 2 7 drives the misaligned movement of the conical discharge cover 1 805 and the discharge cover 2 806.

[0061] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A composite microbial fertilizer particle size detection device, comprising a material barrel (1), characterized in that: An upper cover (2) and a bottom plate (3) are fixedly mounted on the top and bottom of the barrel (1), respectively, and a granular biofertilizer feed port (201) is provided at the center of the top of the upper cover (2); An inner spacer ring (4) and an outer spacer ring (5) are fixedly welded on the bottom plate (3), and the bottom plate (3) is divided into a central screening area (301), an inner ring screening area (302) and an outer ring screening area (303) by the inner spacer ring (4) and the outer spacer ring (5), and the inner spacer ring (4), the outer spacer ring (5) and the outer side of the barrel (1) are respectively provided with a first connecting opening (401), a second connecting opening (501) and a third connecting opening (304); The bottom plate (3) located on the central screening area (301) and the inner ring screening area (302) is provided with a plurality of first through holes (305), and the bottom of the bottom plate (3) corresponding to the positions of the central screening area (301) and the inner ring screening area (302) is provided with a first support plate (6) and a second support plate (7), and the first support plate (6) and the second support plate (7) corresponding to the positions of the first through holes (305) are provided with a plurality of second through holes (601), and the first through holes (305) and the second through holes (601) are provided with a plurality of second through holes (601). The two support plates (6) and the two support plates (7) are connected by an aperture adjustment mechanism (8); the outer bottom of the support plate (6) and the inner top of the support plate (7) are fixedly attached by an elastic rubber ring (9); a group of threaded pins (10) are respectively fixedly welded to the top of the support plate (6) and the top of the support plate (7); a connecting hole (306) is opened on the bottom plate (3) at the position corresponding to the threaded pin (10); the top of the threaded pin (10) passes through the inside of the corresponding connecting hole (306), and the top of the threaded pin (10) is threadedly connected to an adjusting nut.

2. A composite microbial fertilizer particle size detection device according to claim 1, characterized in that: The aperture adjustment mechanism (8) includes a ring seat (801) fixedly mounted at the bottom of the through hole 1 (305) by screws, a ring seat (802) is fixedly welded inside the ring seat (801) by a group of cross bars, the internal channel of the ring seat (802) coincides with the interior of the through hole 1 (305), the ring seat (801) is provided with a number of sliding holes 1 (8011) of not less than 4 at equal intervals, the ring seat (802) is provided with a sliding hole 2 (8021) at the position corresponding to the sliding hole 1 (8011), the sliding hole 1 (8011) and the sliding hole 2 (8021) are connected by a sliding rod (803), and the ring seat (802) is located at the position corresponding to the sliding hole 1 (8011). ) is fixedly welded with a limiting end (8031) at the end of the slide bar (803) located inside the ring seat (801), a downward curved section (8032) is fixedly welded at the end of the slide bar (803) located outside the ring seat (801), and a ball head seat (8033) is fixedly installed at the bottom end of the downward curved section (8032), and a limiting plate (8034) is fixedly welded on the slide bar (803) at the connection between the end of the slide bar (803) and the downward curved section (8032), and a support spring (8035) is sleeved on the slide bar (803), and two ends of the support spring (8035) are respectively in contact with the inner side of the limiting plate (8034) and the outer side of the slide hole (8011).

3. A composite microbial fertilizer particle size detection device according to claim 1, characterized in that: The aperture adjustment mechanism (8) also includes a conical support seat (804) fixedly mounted on the top of the second through hole (601) by means of screws, the top of the conical support seat (804) is a conical ring cover structure, the bottom channel inside the conical support seat (804) coincides with the inside of the second through hole (601), and the balls of the ball head seats (8033) (not less than 4) are all in contact with the inner wall of the conical support seat (804).

4. A composite microbial fertilizer particle size detection device according to claim 1, characterized in that: The bottom of the first support plate (6) is fixedly welded with a conical material discharge cover (805), and the bottom of the first conical material discharge cover (805) is fixedly welded with a hose installation end (8051), and the bottom of the second support plate (7) is fixedly welded with a second material discharge cover (806), and the second material discharge cover (806) is made by welding the conical cover on the outside and the bottom of the cylindrical material discharge barrel on the inside through a sealing plate, and the bottom of the sealing plate at the bottom of the second material discharge cover (806) is fixedly welded with a hose installation end (80 61), the conical cover and the cylindrical discharge barrel are both provided with avoidance openings (8062), a discharge hose (11) is fixedly installed on the hose mounting end (8051), the other end of the discharge hose (11) extends to the outside of the conical cover through the two avoidance openings (8062), a discharge hose (12) is fixedly installed on the hose mounting end (8061), and a discharge hose (13) is fixedly installed on the connecting opening (304).

5. A composite microbial fertilizer particle size detection device according to claim 1, characterized in that: The central screening zone (301) and the inner ring screening zone (302) are connected via the connecting opening one (401), the inner ring screening zone (302) and the outer ring screening zone (303) are connected via the connecting opening two (501), and the outer ring screening zone (303) and the outer side of the barrel (1) are connected via the connecting opening three (304).

6. A composite microbial fertilizer particle size detection device according to claim 1, characterized in that: The bottom of the barrel (1) is fixedly welded with a lower ring (14) via a plurality of columns, the bottom of the lower ring (14) is fixedly installed with a base (16) via a plurality of connecting springs (15), a support frame (17) is fixedly welded inside the lower ring (14), a drive motor (18) is fixedly installed at the center position of the bottom of the support frame (17), the drive shaft at the top of the drive motor (18) passes through the top of the support frame (17), and an eccentric block (19) is fixedly installed at the end of the drive shaft at the top of the drive motor (18).

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