CN108579478A - Pesticide extraction element for pesticide producing - Google Patents

Pesticide extraction element for pesticide producing Download PDF

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Publication number
CN108579478A
CN108579478A CN201810444574.6A CN201810444574A CN108579478A CN 108579478 A CN108579478 A CN 108579478A CN 201810444574 A CN201810444574 A CN 201810444574A CN 108579478 A CN108579478 A CN 108579478A
Authority
CN
China
Prior art keywords
pesticide
mixing unit
cylinder
extraction
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810444574.6A
Other languages
Chinese (zh)
Inventor
屈景斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHONGQING CITY YONGCHUAN DISTRICT TIANTANG CHEMICAL PLANT
Original Assignee
CHONGQING CITY YONGCHUAN DISTRICT TIANTANG CHEMICAL PLANT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CHONGQING CITY YONGCHUAN DISTRICT TIANTANG CHEMICAL PLANT filed Critical CHONGQING CITY YONGCHUAN DISTRICT TIANTANG CHEMICAL PLANT
Priority to CN201810444574.6A priority Critical patent/CN108579478A/en
Publication of CN108579478A publication Critical patent/CN108579478A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/70Pre-treatment of the materials to be mixed
    • B01F23/708Filtering materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F21/00Dissolving
    • B01F21/15Dissolving comprising constructions for blocking or redispersing undissolved solids, e.g. sieves, separators or guiding constructions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F29/00Mixers with rotating receptacles
    • B01F29/40Parts or components, e.g. receptacles, feeding or discharging means
    • B01F29/403Disposition of the rotor axis
    • B01F29/4032Disposition of the rotor axis vertical
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F29/00Mixers with rotating receptacles
    • B01F29/80Mixers with rotating receptacles rotating about a substantially vertical axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00Other mixers; Mixing plants; Combinations of mixers
    • B01F33/25Mixers with loose mixing elements, e.g. loose balls in a receptacle
    • B01F33/251Mixers with loose mixing elements, e.g. loose balls in a receptacle using balls as loose mixing element
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/10Maintenance of mixers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71Feed mechanisms
    • B01F35/712Feed mechanisms for feeding fluids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71Feed mechanisms
    • B01F35/717Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71805Feed mechanisms characterised by the means for feeding the components to the mixer using valves, gates, orifices or openings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30Driving arrangements; Transmissions; Couplings; Brakes
    • B01F2035/35Use of other general mechanical engineering elements in mixing devices
    • B01F2035/351Sealings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/04Mixing biocidal, pesticidal or herbicidal ingredients used in agriculture or horticulture, e.g. for spraying

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Extraction Or Liquid Replacement (AREA)

Abstract

The invention discloses the pesticide extraction elements for pesticide producing, including rack, solution cylinder, the motor being fixed on the rack and several extraction cylinders, solution cylinder is divided into extraction unit and mixing unit, the bottom surface of mixing unit is arc-shaped, mixing unit bottom surface is fixedly connected with shaft, shaft is rotatably connected in rack, it is connected with Geneva mechanism between shaft and the output shaft of motor, several balls that can be rolled in mixing unit are placed in mixing unit, the upper surface of mixing unit is equipped with the water tank being affixed with upper surface, water tank bottom surface offers water outlet, mixing unit upper surface offers the water inlet that can be connected to water outlet, several extraction cylinders are fixed on solution cylinder side wall, it is communicated with communicating pipe between several extraction cylinders and extraction unit, strainer is equipped in communicating pipe.The impurity that water is insoluble in pesticide can be removed and extract the working substance of pesticide by this programme, prevent the impurity for being insoluble in water from blocking pesticide spraying device.

Description

Pesticide extraction element for pesticide producing
Technical field
The present invention relates to pesticide production technology fields, are particularly used for the pesticide extraction element of pesticide producing.
Background technology
Pesticide refer in agricultural production, to ensure, promoting the growth of plant and crops, the desinsection applied, sterilization, A kind of drug for killing harmful animal (or weeds) is referred to as.Refer in particular to be agriculturally used to prevent disease pest and coordinate plant growth, The medicaments such as weeding.
Pesticide has a large amount of impurity for being insoluble in water during production in solid pesticide, and pesticide is in occupation mode The pesticide solution flusher generally is formed by pesticide spraying on crops, and flusher will be blocked containing impurity in pesticide Nozzle, influence the normal use of flusher.Therefore it needs pesticide is soluble in water and extracts removal of impurities.
Invention content
The invention is intended to provide the pesticide extraction element for pesticide producing, the impurity that water is insoluble in pesticide can be gone It removes and separates the working substance of pesticide.
In order to achieve the above object, base case of the invention is as follows:
For the pesticide extraction element of pesticide producing, including rack, solution cylinder, the motor being fixed on the rack and several Cylinder is extracted, the solution cylinder is divided into extraction unit and mixing unit, and the extract part is connected to above mixing unit and with mixing unit, institute The diameter for stating extraction unit is less than the diameter of mixing unit, and the bottom surface of the mixing unit is arc-shaped, and the mixing unit bottom surface, which is fixed, to be connected It is connected to shaft, the shaft is rotatably connected in rack, is fixedly connected with sheave in the shaft, on the output shaft of the motor It is fixed with driver plate, the driver plate is matched with sheave, and several balls that can be rolled in mixing unit are placed in the mixing unit, The upper surface of the mixing unit is equipped with the water tank being affixed with upper surface, and the water tank is fixed on the rack, and the water tank bottom surface is opened Equipped with water outlet, the mixing unit upper surface offers the water inlet that can be connected to water outlet, and the water inlet is equipped with unidirectional Valve offers feed inlet on the upper surface of the mixing unit, and the lower face of the mixing unit offers discharge outlet, the discharge outlet It is communicated with drainpipe, several described extraction cylinders are fixed on solution cylinder side wall, between several described extraction cylinder and extraction units It is communicated with communicating pipe, strainer is equipped in the communicating pipe.
The principle of base case:When operation, solid pesticide is put by feed inlet in mixing unit, and clear water is added and is made The pesticide solution starts motor.Motor, which works, drives driver plate rotation, and driver plate coordinates with sheave makes the rotation of sheave intermittence, to So that shaft and the solution cylinder intermittent rotary being fixedly connected with shaft.The work of the pesticide solution in the extraction unit of top in centrifugal force It is entered under in extraction cylinder, the solid impurity being mixed in the pesticide solution will be blocked by strainer, cannot be introduced into extraction cylinder.
Solution cylinder intermittence rotates, and since the bottom surface of mixing unit is arc-shaped, ball will be when solution cylinder rotates It is moved to side wall under the action of centrifugal force, when solution cylinder stops operating, ball will be moved along arc-shaped bottom surface to center, molten Fluid cylinder intermittent rotary, ball will be rolled around in bottom surface, to be rolled to undissolved solid so that the pesticide in solid Working substance is adequately dissolved in the water, and avoids a large amount of pesticide working substance and is blended in solid impurity and is gone with impurity It removes.Simultaneously as solution cylinder intermittent rotary, the water inlet of mixing unit upper surface is by the water outlet of water tank above interval and mixing unit Connection, when water outlet is connected to water inlet, the water in water tank will go into mixing unit, supply the water in solution cylinder, ensure to carry Take the lasting progress of work.Since water inlet is equipped with check valve, therefore the liquid in solution cylinder will not be by water inlet to outflow Go out.After extracting work completion, discharge outlet is opened, by the discharges such as remaining solid impurity in mixing unit.
The advantages of base case:(1) pesticide is dissolved in clear water by this programme, and is carried to pure the pesticide solution It takes, the impurity for being insoluble in water in pesticide is removed, flusher will be blocked containing the impurity for being insoluble in water by avoiding in pesticide Nozzle, influence the normal use of flusher.
(2) effect of arc-shaped lower face and ball, then the intermittent rotation of conjugate solutions cylinder are used in this programme, it can To be rolled to the solid pesticide dissolved so that pesticide and impurity detach and make pesticide acceleration soluble in water, Other power sources need not be provided, the work pulverized and stirred can be completed, clever structure is energy saving.
(3) water inlet is arranged in the upper surface of mixing unit in this programme, and is provided with and is fixed on the rack on mixing unit top Water tank and be provided with water outlet in tank bottom wall, using the rotation of mixing unit water inlet is connected to water outlet intermittence, from And so that the water interval in water tank enters in mixing unit, supplies the water in mixing unit, it is conducive to dissolving and the pesticide solution of pesticide Extraction.
(4) this programme makes shaft and solution cylinder intermittent rotary, solution cylinder intermittent rotary that can make agriculture using Geneva mechanism After medicine dissolves a period of time, the pesticide solution, which reaches to be rotated further by after certain concentration, to be generated centrifugal force and extracts the pesticide solution. Avoid extraction rate causes the pesticide solution concentration too low very much soon, expends great lot of water resources and the pesticide solution concentration is relatively low to produce The pesticide solution of raw more low concentrations, increases and collects processing cost.
Further, the connectivity part in communicating pipe and solution cylinder is arranged in the strainer, and piston cylinder is equipped with above the solution cylinder, The piston cylinder is fixed on the rack, and the piston cylinder lower part is extend into solution cylinder, and work is slidably connected in the piston cylinder It fills in, piston rod is fixedly connected on the piston, the piston rod upper end is fixedly connected with push rod, and the piston cylinder bottom wall is circumferential Through-hole is offered, suction hose is communicated between the piston cylinder and solution cylinder, the suction hose and through hole are equipped with check valve.
The impurity that accumulation is not dissolved in water is easy on strainer, the impurity of accumulation will excessively influence the water penetration of strainer, to shadow Ring extraction effect.Push rod can be pulled up at this time, to drive piston upwards, so that being generated in piston cylinder negative It presses, the liquid in solution cylinder will be entered by suction hose in piston cylinder, push rod is then pressed downward, so that piston is transported downwards It is dynamic, the liquid in piston cylinder is sprayed by the through-hole of piston cylinder bottom wall, the liquid of ejection will be washed on strainer, will be on strainer Impurity remove, ensure device work is normally carried out.Due to the setting of check valve, the liquid in solution cylinder can only be from suction hose Into in piston cylinder, the liquid in piston cylinder can only enter in solution cylinder from through-hole.
Further, the through hole is equipped with pressure valve, and piston moves down and the hydraulic pressure in piston cylinder is made to reach opening pressure Pressure valve is washed open when the pressure values of valve so that the liquid gone out has higher speed, more preferable to the flushing effect of strainer.
Further, there are three the extraction cylinder is set, this programme is the specific choice to base case.
Further, the water outlet lower port is equipped with sealing ring so that water outlet has with mixing unit upper surface contact portion Preferable leakproofness avoids oozing out among gap of the water in water tank between water tank and mixing unit.
Further, there is sealing ring between the piston cylinder and solution cylinder, ensure the leakproofness in solution cylinder, prevent solution cylinder The pesticide solution is spilt during rotation.
Description of the drawings
Fig. 1 is overall structure diagram of the present invention for the pesticide extraction element embodiment of pesticide producing;
Fig. 2 is the enlarged diagram of A in Fig. 1;
Fig. 3 is structural schematic diagram of the present invention for the piston cylinder in the pesticide extraction element embodiment of pesticide producing;
Fig. 4 is base structure signal of the present invention for the piston cylinder in the pesticide extraction element embodiment of pesticide producing Figure.
Specific implementation mode
It is further described below by specific implementation mode:
Reference numeral in Figure of description includes:Rack 1, solution cylinder 2, extraction unit 3, mixing unit 4, shaft 5, sheave 6, Driver plate 7, motor 8, ball 9, water tank 10, water outlet 11, water inlet 12, feed inlet 13, discharge outlet 14, drainpipe 15, extraction cylinder 16, communicating pipe 17, strainer 18, piston cylinder 19, piston 20, piston rod 21, push rod 22, through-hole 23, suction hose 24.
Embodiment
Substantially as shown in Figure 1:For the pesticide extraction element of pesticide producing, including rack 1, solution cylinder 2, it is fixed on rack Motor 8 on 1 and three extraction cylinders 16.
Solution cylinder 2 divides for extraction unit 3 and mixing unit 4, and extraction unit 3 is located at 4 top of mixing unit and is connected to mixing unit 4, carries The diameter in portion 3 is taken to be less than the diameter of mixing unit 4.The bottom surface of mixing unit 4 is arc-shaped, and 4 underrun of mixing unit has been bolted Shaft 5, shaft 5 are rotatably connected in rack 1.It is fixed with sheave 6 in shaft 5, driver plate 7 is fixed on the output shaft of motor 8, dials Disk 7 is matched with sheave 6.Five balls 9 that can be rolled in mixing unit 4 are placed in mixing unit 4;The upper surface of mixing unit 4 Equipped with the water tank 10 being affixed with upper surface, water tank 10 is bolted in rack 1.As shown in Fig. 2, 10 bottom surface of water tank opens up There are water outlet 11,4 upper surface of mixing unit to offer the water inlet 12 that can be connected to water outlet 11, be equipped at water inlet 12 unidirectional Valve.Feed inlet 13 is offered on the upper surface of mixing unit 4, the lower face of mixing unit 4 offers discharge outlet 14, and discharge outlet 14 is connected to There is drainpipe 15.
Extraction cylinder 16 is welded on 2 side wall of solution cylinder, is extracted and is communicated with communicating pipe 17 between cylinder 16 and extraction unit 3, is connected to Pipe 17 and the connectivity part of solution cylinder 2 are equipped with strainer 18.As shown in Figure 3, Figure 4,2 top of solution cylinder is equipped with piston cylinder 19, piston cylinder 19 are bolted in rack 1, and 19 lower part of piston cylinder is extend into solution cylinder 2;Piston is slidably connected in piston cylinder 19 20, piston rod 21 is welded on piston 20, and 21 upper end of piston rod is welded with push rod 22;There are three 19 bottom wall of piston cylinder circumferentially opens up Through-hole 23 is communicated with suction hose 24, check valve is equipped at suction hose 24 and through-hole 23 between piston cylinder 19 and solution cylinder 2, lead to Pressure valve is equipped at hole 23
Specific implementation process is as follows:When operation, solid pesticide is put by feed inlet 13 in mixing unit 4, and is added clear The pesticide solution is made in water, starts motor 8.The work of motor 8 drives driver plate 7 to rotate, and driver plate 7 coordinates with sheave 6 so that 6 interval of sheave Property rotation so that shaft 5 and 2 intermittent rotary of solution cylinder being fixedly connected with shaft 5.Pesticide in top extraction unit 3 Solution is entered under the influence of centrifugal force in extraction cylinder 16, and the solid impurity being mixed in the pesticide solution will be blocked by strainer 18, It cannot be introduced into extraction cylinder 16.
The intermittent rotation of solution cylinder 2, since the bottom surface of mixing unit 4 is arc-shaped, the ball 9 when solution cylinder 2 rotates To be moved under the influence of centrifugal force to side wall, when solution cylinder 2 stops operating, ball 9 by along arc-shaped bottom surface to center Mobile, 2 intermittent rotary of solution cylinder, ball 9 will be rolled around in bottom surface, to be rolled to undissolved solid so that Gu Pesticide working substance in body is adequately dissolved in the water, and avoids a large amount of pesticide working substance and is blended in solid impurity with impurity It is removed together.Simultaneously as 2 intermittent rotary of solution cylinder, the water inlet 12 of 4 upper surface of mixing unit will interval in mixing unit 4 The water outlet 11 of square water tank 10 is connected to, and when water outlet 11 is connected to water inlet 12, the water in water tank 10 will go into mixing unit 4 In, the water in solution cylinder 2 is supplied, ensures the lasting progress of extraction work.Due to being equipped with check valve, therefore solution cylinder at water inlet 12 Liquid in 2 will not be flowed outwardly by water inlet 12.
The impurity that accumulation is not dissolved in water is easy on strainer 18, the impurity of accumulation will excessively influence the water penetration of strainer 18, from And influence extraction effect.Push rod 22 can be pulled up at this time, to be moved upwards with piston 20, so that piston cylinder 19 Interior generation negative pressure, the liquid in solution cylinder 2 will be entered by suction hose 24 in piston cylinder 19, and push rod 22 is then pressed downward, from And so that piston 20 moves downward, and the liquid in piston cylinder 19 is sprayed by the through-hole 23 of 19 bottom wall of piston cylinder, the liquid of ejection Body will be washed on strainer 18, and the impurity on strainer 18 is removed, and ensure being normally carried out for device work.When extraction work is completed Later, discharge outlet 14 is opened, by the discharges such as remaining solid impurity in mixing unit 4.
In addition, 11 lower port of water outlet is equipped with sealing ring so that water outlet 11 and 4 upper surface contact portion of mixing unit have compared with Good leakproofness, avoids oozing out among gap of the water in water tank 10 between water tank 10 and mixing unit 4.Piston cylinder 19 and solution There is sealing ring between cylinder 2, ensures the leakproofness in solution cylinder 2, prevent the pesticide solution during rotation of solution cylinder 2 from spilling.
Above-described is only the embodiment of the present invention, and the common sense such as well known concrete structure and/or characteristic are herein in scheme It does not describe excessively.It should be pointed out that for those skilled in the art, without departing from the structure of the invention, also Several modifications and improvements can be made, these should also be considered as protection scope of the present invention, these all do not interfere with of the invention real The effect and patent practicability applied.The scope of protection required by this application should be based on the content of the claims, specification In the records such as specific implementation mode can be used for explaining the content of claim.

Claims (6)

1. the pesticide extraction element for pesticide producing, it is characterised in that:Including rack, solution cylinder, the electricity being fixed on the rack Machine and several extraction cylinders, the solution cylinder are divided into extraction unit and mixing unit, the extract part in mixing unit above and with mix Conjunction portion is connected to, and the diameter of the extraction unit is less than the diameter of mixing unit, and the bottom surface of the mixing unit is arc-shaped, the mixing unit Bottom surface is fixedly connected with shaft, and the shaft is rotatably connected in rack, and sheave, the motor are fixedly connected in the shaft Output shaft on be fixed with driver plate, the driver plate is matched with sheave, and being placed in the mixing unit can roll in mixing unit Several balls, the upper surface of the mixing unit is equipped with the water tank being affixed with upper surface, and the water tank is fixed on the rack, described Water tank bottom surface offers water outlet, and the mixing unit upper surface offers the water inlet that can be connected to water outlet, the water inlet Place is equipped with check valve, and feed inlet is offered on the upper surface of the mixing unit, and the lower face of the mixing unit offers discharge outlet, The discharge outlet is communicated with drainpipe, several described extraction cylinders are fixed on solution cylinder side wall, several described extraction cylinders with It is communicated with communicating pipe between extraction unit, strainer is equipped in the communicating pipe.
2. the pesticide extraction element according to claim 1 for pesticide producing, it is characterised in that:The strainer setting exists The connectivity part of communicating pipe and solution cylinder, the solution cylinder top are equipped with piston cylinder, and the piston cylinder is fixed on the rack, the work Plug cylinder lower part is extend into solution cylinder, and piston is slidably connected in the piston cylinder, piston rod is fixedly connected on the piston, The piston rod upper end is fixedly connected with push rod, and the piston cylinder bottom wall circumferentially offers through-hole, the piston cylinder and solution cylinder Between be communicated with suction hose, the suction hose and through hole are equipped with check valve.
3. the pesticide extraction element according to claim 2 for pesticide producing, it is characterised in that:The through hole is equipped with Pressure valve.
4. the pesticide extraction element according to claim 3 for pesticide producing, it is characterised in that:The extraction cylinder is equipped with Three.
5. the pesticide extraction element according to claim 4 for pesticide producing, it is characterised in that:The water outlet lower end Mouth is equipped with sealing ring.
6. the pesticide extraction element according to claim 5 for pesticide producing, it is characterised in that:The piston cylinder with it is molten Sealing ring is equipped between fluid cylinder.
CN201810444574.6A 2018-05-10 2018-05-10 Pesticide extraction element for pesticide producing Pending CN108579478A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810444574.6A CN108579478A (en) 2018-05-10 2018-05-10 Pesticide extraction element for pesticide producing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810444574.6A CN108579478A (en) 2018-05-10 2018-05-10 Pesticide extraction element for pesticide producing

Publications (1)

Publication Number Publication Date
CN108579478A true CN108579478A (en) 2018-09-28

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Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112295306A (en) * 2020-10-21 2021-02-02 湖南惠民生物科技有限公司 A pesticide extraction element for pesticide production

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112295306A (en) * 2020-10-21 2021-02-02 湖南惠民生物科技有限公司 A pesticide extraction element for pesticide production

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Application publication date: 20180928