CN113118021A - Water-soluble fertilizer grading and screening equipment and fertilizing method - Google Patents
Water-soluble fertilizer grading and screening equipment and fertilizing method Download PDFInfo
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- CN113118021A CN113118021A CN202110512867.5A CN202110512867A CN113118021A CN 113118021 A CN113118021 A CN 113118021A CN 202110512867 A CN202110512867 A CN 202110512867A CN 113118021 A CN113118021 A CN 113118021A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/50—Cleaning
- B07B1/52—Cleaning with brushes or scrapers
- B07B1/526—Cleaning with brushes or scrapers with scrapers
- B07B1/528—Cleaning with brushes or scrapers with scrapers the scrapers being rotating
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- Fertilizers (AREA)
- Fertilizing (AREA)
Abstract
The invention discloses water-soluble fertilizer grading and screening equipment and a fertilizing method, and the water-soluble fertilizer grading and screening equipment comprises a base, two shells, a screening plate, a top plate, a mounting plate, a motor, a control box, a switch group, an upper stirring shaft, a lower stirring shaft, a bottom plate and a discharging mechanism, wherein the shells are placed on the upper side surface of the base; a top plate is welded on the upper side of the shell, and an installation plate is welded on one side of the shell; the upper side surface of the mounting plate is provided with a motor through a base, wherein the output end of the motor is provided with a discharging mechanism through a joint; the control box is installed through the bolt to the lateral surface of base. According to the invention, the problems of inconvenient use, complex operation, insufficient fineness of screening, easy blockage of water-soluble fertilizer, inconvenient discharging and poor safety protection of the existing water-soluble fertilizer grading and screening equipment are solved by arranging the shell, the upper stirring shaft, the material stop mechanism, the discharging mechanism and the screening plate.
Description
Technical Field
The invention relates to the field of water-soluble fertilizer production devices, in particular to water-soluble fertilizer grading and screening equipment and a fertilizing method.
Background
The water-soluble fertilizer is a compound fertilizer containing nitrogen, phosphorus, potassium, calcium, magnesium, trace elements, amino acid, humic acid, alginic acid and the like, which can be completely dissolved in water. The fertilizer is divided into a solid water-soluble fertilizer and a liquid water-soluble fertilizer in form. The fertilizer comprises macroelement water-soluble fertilizer, secondary element water-soluble fertilizer, microelement water-soluble fertilizer, amino acid-containing water-soluble fertilizer, humic acid-containing water-soluble fertilizer, organic water-soluble fertilizer and the like according to the nutrient content.
Compared with the traditional calcium superphosphate, granulated compound fertilizer and other varieties, the water-soluble fertilizer has obvious advantages. It is a quick-acting fertilizer, has good water solubility and no residue, can be completely dissolved in water, and can be directly absorbed and utilized by the root system and leaf surface of crops. The water and fertilizer are applied simultaneously, and water is used for carrying the fertilizer, so that the water and fertilizer integration is realized, and the effective absorption rate of the fertilizer is more than one time higher than that of the common fertilizer and reaches 80-90 percent; and the fertilizer efficiency is fast, and the nutritional requirement of the high-yield crops in the fast growth period can be met. The water demand of the drip irrigation system is only 30% of that of the common fertilizer, and the fertilization operation almost needs no manpower, so that the labor cost is greatly saved. There have been increasing numbers of soil fertility experts, agricultural technology extension experts, agricultural dealers and farmers recognizing the importance of water soluble fertilizers. But current water-soluble fertile grading screening equipment still has the use inconvenient, and the operation is comparatively complicated, and what sieve is careful not enough, and water-soluble fertile produces the jam easily, and the ejection of compact is inconvenient, the relatively poor problem of safety protection nature.
Therefore, the invention of the water soluble fertilizer grading and screening device is very necessary.
Disclosure of Invention
The invention aims to provide water-soluble fertilizer grading and screening equipment to solve the problems that the existing water-soluble fertilizer grading and screening equipment is still inconvenient to use, complex to operate, not delicate in screening, easy to block water-soluble fertilizer, inconvenient to discharge and poor in safety protection performance.
In order to achieve the purpose, the invention provides the following technical scheme: comprises a stirring mechanism and a discharging mechanism;
two shells are arranged on the upper side surface of the base, and a screening plate is arranged between the two shells; the discharging mechanism is arranged inside the shell; the stirring mechanism comprises an upper stirring shaft and a lower stirring shaft, the inner part of the shell is provided with the upper stirring shaft, and the lower end of the upper stirring shaft penetrates through the sieving plate and is connected with the lower stirring shaft.
The device comprises a top plate, a mounting plate, a motor, a control box, a switch group and a bottom plate;
the top plate is welded on the upper side of the shell, and the mounting plate is welded on one side of the shell; the upper side surface of the mounting plate is provided with a motor through a base, wherein the output end of the motor is provided with a discharging mechanism through a joint; the outer side surface of the base is provided with a control box through a bolt, one side surface of the control box is provided with a switch group through a bolt, the lower end of the lower stirring shaft penetrates through the bottom plate to be connected with a motor, and the motor is arranged on the lower side surface of the bottom plate through a machine base; the upper end of the upper stirring shaft is connected with the top plate through a bearing, and the upper stirring shaft is connected with the screening plate through a bearing; the bottom plate is welded inside the base;
the shell comprises an outer shell, an inner cavity, mounting holes and a material blocking mechanism, wherein the number of the outer shell is two, the upper end of the outer shell is welded with a top plate and a screening plate, and the lower end of the outer shell is welded with the screening plate and a bottom plate respectively; an inner shell is arranged in the outer shell, and a gap of one centimeter to two centimeters is formed between the inner shell and the outer shell; an inner cavity is arranged in the inner shell, mounting holes are formed in two ends of the inner shell, and a discharging mechanism penetrates through the inside of each mounting hole through a bearing; the bottom of shell and inner shell is provided with stock stop, and this stock stop is provided with four, and the noise that the in-process of screening appears can be effectually reduced to fertilizer to the setting of shell and inner shell, and the result of use is better, and safety protection nature is better, has improved workman's operational environment, is favorable to workman's physical and mental health, when long-time use back, even the inner shell appears damaging, the shell also can effectually prevent that water-soluble fertilizer from revealing.
The upper stirring shaft comprises a transmission shaft, stirring blades, a connecting shaft, a groove and a scraper, the upper end of the transmission shaft is connected with the top plate through a bearing, and the lower end of the transmission shaft is connected with the screening plate through a bearing; four to six stirring blades are arranged on two side surfaces of the transmission shaft, wherein a connecting shaft is arranged at the other end of each stirring blade, a groove is formed in the middle of the connecting shaft, and a discharging mechanism penetrates through the middle of the groove; stirring vane's downside welding has the scraper blade, and wherein the scraper blade is provided with two, and stirring vane's setting can be effectual stirs water-soluble fertilizer, avoids water-soluble fertilizer to appear the condition of blockking up in the inside of casing, and the setting of scraper blade can effectually prevent that water-soluble fertilizer from appearing accumulational condition in the side of going up of screening board, and the result of use is better.
The material blocking mechanism comprises discharge ports, electric push rods and baffle plates, the discharge ports are arranged on the lower side surface of the shell, and the number of the discharge ports is four; the inner side surface of the shell is provided with an electric push rod, and the output end of the electric push rod is welded with a baffle; the baffle sets up the medial surface at the discharge gate, wherein is provided with the slide between baffle and the casing, and the setting of baffle can effectually prevent water-soluble fertilizer at the in-process of screening, the condition that water-soluble fertilizer leaked appears, and safety protection nature is higher, the effectual use cost who reduces the user.
The four discharging mechanisms are arranged; one end of the rotating shaft penetrates through the shell to be connected with the output end of the motor, and the other end of the rotating shaft is connected with the shell through a bearing; the lateral surface welding of axis of rotation has helical blade, and wherein helical blade adopts the heliciform that cast iron material set up and form, and the helical blade can be effectually be delivered to the work of motor to the setting of transmission shaft, and wherein helical blade can derive water-soluble fertilizer in the inside of casing at the pivoted in-process, and the ejection of compact is very fast to can with last (mixing) shaft and lower (mixing) shaft cooperation, derive the inside water-soluble fertilizer of casing completely, the result of use is better.
A plurality of through holes are formed in the screening plate, shells are welded on the upper side surface and the lower side surface of the screening plate, and an upper stirring shaft penetrates through the middle part of the screening plate through a bearing; the screening board adopts the slabby that the stainless steel material casting formed, can sieve water-soluble fertilizer through the cooperation with last (mixing) shaft, and the operation is comparatively simple, and safety protection nature is better.
The base is provided with two arc-shaped supporting legs at the bottoms of two side faces, the upper side face of the base is connected with the shell through a bolt, the base is made into a hollow cylinder shape by adopting a cast iron material, a bottom plate is welded in the base, the base is favorable for supporting the shell, the phenomenon that the shell is inclined is prevented, and the use safety is guaranteed.
A method for applying a water-soluble fertilizer, which comprises using the water-soluble fertilizer grading and screening apparatus as claimed in any one of claims 1 to 8.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, due to the arrangement of the shell, the outer shell and the inner shell, noise generated in the screening process of the fertilizer can be effectively reduced, the using effect is good, the safety protection performance is good, the working environment of workers is improved, the physical and mental health of the workers is facilitated, and after the fertilizer is used for a long time, even if the inner shell is damaged, the outer shell can also effectively prevent the water-soluble fertilizer from leaking.
2. According to the invention, due to the arrangement of the upper stirring shaft, the stirring blades can effectively stir the water-soluble fertilizer, the water-soluble fertilizer is prevented from being blocked in the shell, the scraper can effectively prevent the water-soluble fertilizer from being accumulated on the upper side surface of the screening plate, and the using effect is better.
3. Due to the arrangement of the material blocking mechanism, the baffle can effectively prevent the water-soluble fertilizer from leaking in the screening process, the safety protection performance is high, and the use cost of a user is effectively reduced.
4. According to the invention, due to the arrangement of the discharging mechanism, the transmission shaft can effectively transmit the work of the motor to the spiral blade, the spiral blade can guide out the water-soluble fertilizer in the shell in the rotating process, the discharging is faster, and the spiral blade can be matched with the upper stirring shaft and the lower stirring shaft to completely guide out the water-soluble fertilizer in the shell, so that the using effect is better.
5. The screening plate is arranged, so that the water-soluble fertilizer can be screened by matching with the upper stirring shaft, the operation is simple, and the safety protection performance is good.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an external structural view of the present invention.
Fig. 3 is a schematic structural view of the housing of the present invention.
FIG. 4 is a schematic view of the upper stirring shaft of the present invention.
Fig. 5 is a schematic structural view of the stock stop of the present invention.
Fig. 6 is a schematic structural diagram of the discharging mechanism of the invention.
Fig. 7 is a schematic structural view of the base of the present invention.
In the figure:
1-base, 2-shell, 21-outer shell, 22-inner shell, 23-inner cavity, 24-mounting hole, 25-material stopping mechanism, 251-discharge hole, 252-electric push rod, 253-baffle, 3-screening plate, 4-top plate, 5-mounting plate, 6-motor, 7-control box, 8-switch group, 9-upper stirring shaft, 91-transmission shaft, 92-stirring blade, 93-connection shaft, 94-groove, 95-scraper, 10-lower stirring shaft, 11-bottom plate, 12-discharge mechanism, 121-rotation shaft and 122-helical blade.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figures 1-7:
the invention provides water-soluble fertilizer grading and screening equipment which comprises a base 1, two shells 2, two screening plates 3, a top plate 4, a mounting plate 5, a motor 6, a control box 7, a switch group 8, an upper stirring shaft 9, a lower stirring shaft 10, a bottom plate 11 and a discharging mechanism 12, wherein the shells 2 are placed on the upper side surface of the base 1, and the screening plates 3 are arranged between the two shells 2; a top plate 4 is welded on the upper side of the shell 2, and a mounting plate 5 is welded on one side of the shell 2; the upper side surface of the mounting plate 5 is provided with a motor 6 through a base, wherein the output end of the motor 6 is provided with a discharging mechanism 12 through a joint; a control box 7 is installed on the outer side surface of the base 1 through a bolt, and a switch group 8 is installed on one side surface of the control box 7 through a bolt; an upper stirring shaft 9 is arranged in the shell 2, wherein the lower end of the upper stirring shaft 9 penetrates through the sieving plate 3 and is connected with a lower stirring shaft 10, the lower end of the lower stirring shaft 10 penetrates through the bottom plate 11 and is connected with a motor 6, and the motor 6 is arranged on the lower side surface of the bottom plate 11 through a machine base; the upper end of the upper stirring shaft 9 is connected with the top plate 4 through a bearing, and the upper stirring shaft 9 is connected with the screening plate 3 through a bearing; the bottom plate 11 is welded inside the base 1; the discharge mechanism 12 is arranged inside the housing 2.
The shell 2 comprises an outer shell 21, an inner shell 22, an inner cavity 23, mounting holes 24 and a material blocking mechanism 25, wherein the number of the outer shell 21 is two, the top plate 4 and the screening plate 3 are welded at the upper end of the outer shell 21, and the lower end of the outer shell 21 is welded with the screening plate 3 and the bottom plate 11 respectively; an inner shell 22 is arranged inside the outer shell 21, wherein a gap of one centimeter to two centimeters is arranged between the inner shell 22 and the outer shell 21; an inner cavity 22 is arranged in the inner shell 22, wherein mounting holes 24 are arranged at two ends of the inner shell 22, and a material blocking mechanism 25 penetrates through the inside of each mounting hole 24 through a bearing; the bottom of shell 21 and inner shell 22 is provided with stock stop 25, and this stock stop 25 is provided with four, and the noise that the in-process that sets up of shell 21 and inner shell 22 can be effectual to fertilizer appears at the screening is cut down, and the result of use is better, and safety protection nature is better, has improved workman's operational environment, is favorable to workman's physical and mental health, when long-time use after, even damage appears in inner shell 22, shell 21 also can effectually prevent that water-soluble fertilizer from revealing.
The upper stirring shaft 9 comprises a transmission shaft 91, stirring blades 92, a connecting shaft 93, a groove 94 and a scraper 95, the upper end of the transmission shaft 91 is connected with the top plate 4 through a bearing, and the lower end of the transmission shaft 91 is connected with the screening plate 3 through a bearing; four to six stirring blades 92 are arranged on two side surfaces of the transmission shaft 91, wherein a connecting shaft 93 is arranged at the other end of each stirring blade 92, a groove 94 is formed in the middle of each connecting shaft 93, and a discharging mechanism 12 penetrates through the middle of each groove 94; stirring vane 92's downside welding has scraper blade 95, and wherein scraper blade 95 is provided with two, and stirring vane 92's setting can be effectual stirs water-soluble fertilizer, avoids water-soluble fertilizer to appear the condition of blockking up in the inside of casing 2, and scraper blade 95's setting can effectually prevent that water-soluble fertilizer from appearing accumulational condition in the side of going up of screening board 3, and the result of use is better.
The material blocking mechanism 25 comprises discharge ports 251, electric push rods 252 and baffles 253, the discharge ports 251 are arranged on the lower side surface of the shell 2, and four discharge ports 251 are arranged; an electric push rod 252 is arranged on the inner side surface of the shell 2, wherein a baffle 253 is welded at the output end of the electric push rod 252; baffle 253 sets up the medial surface at discharge gate 251, wherein is provided with the slide between baffle 253 and the casing 2, and the setting of baffle 253 can effectually prevent the water-soluble fertile in-process of screening, the condition of water-soluble fertile leakage appears, and safety protection nature is higher, the effectual use cost that has reduced the user.
The discharging mechanism 12 comprises a rotating shaft 121 and four helical blades 122, and the number of the discharging mechanisms 12 is four; one end of the rotating shaft 121 penetrates through the housing 2 to be connected with the output end of the motor 6, wherein the other end of the rotating shaft 121 is connected with the housing 2 through a bearing; the outside welding of axis of rotation 121 has helical blade 122, and wherein helical blade 122 adopts the heliciform that the cast iron material set up and form, and helical blade 122 can be effectually be delivered to motor 6's work to setting up of transmission shaft 121, and wherein helical blade 122 can derive water-soluble fertilizer in the inside of casing 2 at the pivoted in-process, and the ejection of compact is very fast, and can cooperate with last (mixing) shaft 9 and lower (mixing) shaft 10, derive 2 inside water-soluble fertilizers completely of casing, and the result of use is better.
When the water-soluble fertilizer screening machine is used, firstly, the top plate 4 is taken down, then the water-soluble fertilizer is placed in the shell 2, then the motor 6 is turned on through the switch group 8, the motor 6 drives the upper stirring shaft 9 and the lower stirring shaft 10 to rotate, the water-soluble fertilizer is stirred, the fine water-soluble fertilizer can penetrate through the screening plate 3 to enter the upper side face of the bottom plate 11 in the stirring process, after screening for a period of time, the material blocking mechanism 25 and the motor 6 are turned on through the switch group 8, the motor 6 drives the discharging mechanism 12 to rotate, the discharging mechanism 12 can discharge the two water-soluble fertilizers at different discharge ports 251 in the rotating process,
all parts used in the application document are standard parts, the specific connection mode of all parts adopts conventional means such as sewing, sticking and the like mature in the prior art, and all structures adopt conventional materials in the prior art, so that detailed description is not given.
In summary, the following steps: this water-soluble fertile grading screening equipment goes up (mixing) shaft 9, stock stop 25, discharge mechanism 12 and screening board 3 through setting up casing 2, solves current water-soluble fertile grading screening equipment and still exists the use inconvenient, and the operation is comparatively complicated, and what sieve is careful inadequately, and water-soluble fertile produces easily and blocks up, and the ejection of compact is inconvenient, the relatively poor problem of safety protection nature.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A water soluble fertilizer grading and screening device comprises a base (1), a shell (2), a screening plate (3), a stirring mechanism and a discharging mechanism (12);
the upper side surface of the base (1) is provided with two shells (2), and a screening plate (3) is arranged between the two shells (2);
the discharging mechanism (12) is arranged inside the shell (2);
the stirring mechanism comprises an upper stirring shaft (9) and a lower stirring shaft (10), the upper stirring shaft (9) is arranged inside the shell (2), and the lower end of the upper stirring shaft (9) penetrates through the sieving plate (3) and is connected with the lower stirring shaft (10).
2. The water soluble fertilizer grading and screening device as in claim 1, wherein: the device further comprises: the device comprises a top plate (4), a mounting plate (5), a motor (6), a control box (7), a switch group (8) and a bottom plate (11);
the top plate (4) is welded on the upper side face of the shell (2), and the mounting plate (5) is welded on one side face of the shell (2); the upper side surface of the mounting plate (5) is provided with a motor (6) through a machine base, wherein the output end of the motor (6) is provided with a discharging mechanism (12) through a joint; a control box (7) is installed on the outer side surface of the base (1) through bolts, a switch group (8) is installed on one side surface of the control box (7) through bolts, the lower end of the lower stirring shaft (10) penetrates through a bottom plate (11) to be connected with a motor (6), and the motor (6) is installed on the lower side surface of the bottom plate (11) through a machine base; the upper end of the upper stirring shaft (9) is connected with the top plate (4) through a bearing, and the upper stirring shaft (9) is connected with the screening plate (3) through a bearing; the bottom plate (11) is welded inside the base (1).
3. The water soluble fertilizer grading and screening device as in claim 2, wherein: the shell (2) comprises an outer shell (21), an inner shell (22), an inner cavity (23), mounting holes (24) and a material blocking mechanism, wherein the number of the outer shell (21) is two, a top plate (4) and a screening plate (3) are welded at the upper end of the outer shell (21), and the lower end of the outer shell (21) is welded with the screening plate (3) and a bottom plate (11) respectively; an inner shell (22) is arranged in the outer shell (21), and a gap of one centimeter to two centimeters is formed between the inner shell (22) and the outer shell (21); an inner cavity (22) is formed in the inner shell (22), mounting holes (24) are formed in two ends of the inner shell (22), and a material blocking mechanism penetrates through the inside of each mounting hole (24) through a bearing; the bottom of the outer shell (21) and the bottom of the inner shell (22) are provided with four stock stop mechanisms.
4. The water soluble fertilizer grading and screening device as in claim 2, wherein: the upper stirring shaft (9) comprises a transmission shaft (91), stirring blades (92), a connecting shaft (93), a groove (94) and a scraper (95), the upper end of the transmission shaft (91) is connected with the top plate (4) through a bearing, and the lower end of the transmission shaft (91) is connected with the screening plate (3) through a bearing; four to six stirring blades (92) are arranged on two side surfaces of the transmission shaft (91), a connecting shaft (93) is arranged at the other end of each stirring blade (92), a groove (94) is formed in the middle of each connecting shaft (93), and a discharging mechanism (12) penetrates through the middle of each groove (94); scrapers (95) are welded on the lower side face of the stirring blade (92), and two scrapers (95) are arranged.
5. The water soluble fertilizer grading and screening device as in claim 1, wherein: the material blocking mechanism comprises discharge ports (251), electric push rods (252) and baffle plates (253), the discharge ports (251) are arranged on the lower side surface of the shell (2), and the number of the discharge ports (251) is four; an electric push rod (252) is arranged on the inner side surface of the shell (2), and a baffle (253) is welded at the output end of the electric push rod (252); baffle (253) set up the medial surface at discharge gate (251), wherein be provided with the slide between baffle (253) and casing (2).
6. The water soluble fertilizer grading and screening device as in claim 1, wherein: the discharging mechanisms (12) comprise rotating shafts (121) and spiral blades (122), and the number of the discharging mechanisms (12) is four; one end of the rotating shaft (121) penetrates through the shell (2) and is connected with the output end of the motor (6), and the other end of the rotating shaft (121) is connected with the shell (2) through a bearing; helical blades (122) are welded on the outer side face of the rotating shaft (121), and the helical blades (122) are arranged in a spiral shape by adopting cast iron materials.
7. The water soluble fertilizer grading and screening device as in claim 1, wherein: a plurality of through holes are formed in the screening plate (3), the shells (2) are welded on the upper side surface and the lower side surface of the screening plate (3), and the middle part of the screening plate (3) penetrates through an upper stirring shaft (9) through a bearing; the screening plate (3) is a plate made of stainless steel through casting.
8. The water soluble fertilizer grading and screening device as in claim 1, wherein: the two arc-shaped supporting legs are arranged at the bottoms of the two side faces of the base (1), wherein the upper side face of the base (1) is connected with the shell (2) through bolts, and the base (1) is made into a hollow cylinder shape by adopting a cast iron material.
9. A water-soluble fertilizer fertilizing method is characterized in that: the fertilization method uses a water soluble fertilizer grading and screening device as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110512867.5A CN113118021A (en) | 2021-05-11 | 2021-05-11 | Water-soluble fertilizer grading and screening equipment and fertilizing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110512867.5A CN113118021A (en) | 2021-05-11 | 2021-05-11 | Water-soluble fertilizer grading and screening equipment and fertilizing method |
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| CN113118021A true CN113118021A (en) | 2021-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110512867.5A Pending CN113118021A (en) | 2021-05-11 | 2021-05-11 | Water-soluble fertilizer grading and screening equipment and fertilizing method |
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| CN (1) | CN113118021A (en) |
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Application publication date: 20210716 |
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