CN112755952A - Process equipment for producing n-hexyl chloroformate - Google Patents
Process equipment for producing n-hexyl chloroformate Download PDFInfo
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- CN112755952A CN112755952A CN202011631650.8A CN202011631650A CN112755952A CN 112755952 A CN112755952 A CN 112755952A CN 202011631650 A CN202011631650 A CN 202011631650A CN 112755952 A CN112755952 A CN 112755952A
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- reaction tank
- groove
- temperature control
- wall
- fixed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/28—Moving reactors, e.g. rotary drums
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/0013—Controlling the temperature of the process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention relates to a n-hexyl chloroformate production process device, which comprises a temperature control groove, wherein a bearing groove is movably arranged on the inner side of the temperature control groove, the two sides of the bearing groove are connected with the inner wall of the temperature control groove through elastic telescopic components, an inserting groove is arranged on the inner side of the bearing groove, a reaction tank is inserted into the inner side of the inserting groove, a stirring component is arranged on the inner side of the reaction tank, one end of the stirring component penetrates through the upper side wall of the reaction tank and is fixedly connected with an output shaft of a motor arranged on the reaction tank, and the other end of the stirring component penetrates through the bottom of the reaction tank and is connected with a reciprocating component connected with the bearing groove and the temperature control groove through a sliding limiting component; the inner wall of the air guide cavity is also provided with a medium flow passage, and the medium flow passage is communicated with the pushing assembly arranged in the temperature control groove.
Description
Technical Field
The invention relates to the technical field related to the production of n-hexyl chloroformate, in particular to a process device for producing the n-hexyl chloroformate.
Background
The n-hexyl chloroformate is a chemical product with the molecular formula of C7H13ClO2, is mainly used as an organic synthesis reagent and is a raw material of various medicines.
In the production process of n-hexyl chloroformate, synthesis and preparation are generally realized by introducing phosgene into n-ethanol, but the reaction temperature needs to be kept constant in the synthesis process, the outer side of a reaction tank is heated at constant temperature in the prior art, but the temperature cannot be kept constant during constant temperature heating, and only changes within a certain temperature range, so that the synthesis effect is influenced.
Disclosure of Invention
The invention aims to provide a production process device of n-hexyl chloroformate, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the n-hexyl chloroformate production process equipment comprises a temperature control groove, wherein a bearing groove is movably arranged on the inner side of the temperature control groove, two sides of the bearing groove are connected with the inner wall of the temperature control groove through elastic telescopic components, an inserting groove is arranged on the inner side of the bearing groove, a reaction tank is inserted into the inner side of the inserting groove, a stirring component is arranged on the inner side of the reaction tank, one end of the stirring component penetrates through the upper side wall of the reaction tank and is fixedly connected with an output shaft of a motor arranged on the reaction tank, the other end of the stirring component penetrates through the bottom of the reaction tank and is connected with a reciprocating component connected with the bearing groove and the temperature control groove through a sliding limiting component, a gas guide cavity is arranged on the inner wall of the bearing groove, a through hole is formed in the inner wall of the gas guide cavity, and a one-way gas inlet valve matched with the through hole is arranged on the reaction tank, when the stirring assembly is connected with the reciprocating assembly, the through hole is communicated with the one-way air inlet valve;
the inner wall of the air guide cavity is also provided with a medium flow channel, the medium flow channel is communicated with a pushing assembly arranged in the temperature control groove, and when the receiving groove moves in a reciprocating manner, the pushing assembly intermittently leads the temperature control medium in the temperature control groove into the medium flow channel so as to realize the replacement of the temperature control medium in the medium flow channel.
As a further scheme of the invention: the reaction tank is fixed with the bearing groove through a bolt.
As a still further scheme of the invention: the stirring assembly is installed including rotating the drive shaft in the retort, the one end of drive shaft with the output shaft fixed connection of motor, the other end runs through the retort and through slip spacing subassembly with reciprocating assembly connects, is located be fixed with helical blade on the drive shaft in the retort.
As a still further scheme of the invention: an annular cavity is further fixed on the inner side of the reaction tank, the annular cavity is fixed with the bottom of the reaction tank, a plurality of communicating holes are formed in the position, close to the bottom of the reaction tank, of the annular cavity, and a gap is reserved between the annular cavity and the top of the inner side of the reaction tank.
As a still further scheme of the invention: the reciprocating assembly comprises a rack frame fixed at the bottom of the temperature control groove and an incomplete gear movably mounted in the rack frame, a toothed part on the incomplete gear is intermittently meshed with two strip-shaped teeth on the inner side of the rack frame, the incomplete gear is rotatably connected with the bearing groove through a connecting sleeve fixedly connected with the incomplete gear, and the connecting sleeve is connected with the driving shaft through a sliding limiting assembly.
As a still further scheme of the invention: the sliding limiting assembly comprises at least one strip limiting block fixed on the driving shaft, and the strip limiting block is in sliding fit with a strip limiting groove formed in the inner wall of the connecting sleeve.
As a still further scheme of the invention: the pushing assembly comprises a piston cylinder fixed on the inner wall of the temperature control groove, a piston is arranged on the inner side of the piston cylinder, the piston is fixedly connected with a hard guide pipe fixed on the bearing groove, and the hard guide pipe is communicated with the inner side of the medium flow passage;
the piston cylinder is provided with a liquid inlet, and the liquid inlet and the hard conduit are internally provided with one-way valves.
As a still further scheme of the invention: the elastic telescopic assembly comprises a fixing rod and a fixing sleeve which are respectively fixed on the temperature control groove and the bearing groove, and the fixing rod faces towards one end of the fixing sleeve and is inserted into the fixing sleeve and is connected with the inner wall of the fixing sleeve through a spring.
Compared with the prior art, the invention has the beneficial effects that: the stirring assembly is driven to rotate by the arranged motor when the stirring assembly works, so that the reciprocating assembly is matched to move to drive the receiving groove and the reaction tank to integrally reciprocate, the pushing assembly intermittently leads the temperature control medium in the temperature control groove into the medium flow channel when the receiving groove moves reciprocally, so that the temperature control medium in the medium flow channel is replaced, the temperature control effect on the reaction tank is ensured, the practicability is high, the reaction tank is detachably connected with the receiving groove, and the unloading is convenient.
Drawings
FIG. 1 is a schematic diagram of the structure of a process apparatus for the production of n-hexyl chloroformate.
FIG. 2 is a schematic diagram of the structure of n-hexyl chloroformate production apparatus in the disengaged state of the reaction tank.
Fig. 3 is an enlarged view of a structure at a in fig. 1.
Fig. 4 is an enlarged view of the structure at B in fig. 1.
In the figure: 1-temperature control groove, 2-elastic telescopic component, 3-rack frame, 4-bearing groove, 5-piston cylinder, 6-hard conduit, 7-piston, 8-air guide cavity, 9-medium flow channel, 10-reaction tank, 11-motor, 12-through hole, 13-driving shaft, 15-helical blade, 14-annular cavity, 16-communicating hole, 17-inserting groove, 18-incomplete gear, 19-connecting sleeve and 20-one-way air inlet valve.
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.
In addition, an element of the present invention may be said to be "fixed" or "disposed" to another element, either directly on the other element or with intervening elements present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Referring to fig. 1 to 4, in the embodiment of the present invention, a n-hexyl chloroformate production process apparatus includes a temperature control tank 1, a receiving tank 4 is movably installed inside the temperature control tank 1, both sides of the receiving tank 4 are connected to an inner wall of the temperature control tank 1 through elastic telescopic components 2, an insertion tank 17 is installed inside the receiving tank 4, a reaction tank 10 is inserted inside the insertion tank 17, a stirring component is installed inside the reaction tank 10, one end of the stirring component penetrates through an upper side wall of the reaction tank 10 and is fixedly connected to an output shaft of a motor 11 installed on the reaction tank 10, the other end penetrates through a bottom of the reaction tank 10 and is connected to a reciprocating component connecting the receiving tank 4 and the temperature control tank 1 through a sliding limiting component, an air guide cavity 8 is installed on an inner wall of the receiving tank 4, a through hole 12 is formed in the inner wall of the air guide cavity 8, a one-way air inlet valve 20 matched with the through hole 12 is arranged on the reaction tank 10, and when the stirring assembly is connected with the reciprocating assembly, the through hole 12 is communicated with the one-way air inlet valve 20;
the inner wall of the air guide cavity 8 is also provided with a medium flow channel 9, the medium flow channel 9 is communicated with a pushing assembly arranged in the temperature control groove 1, and when the bearing groove 4 moves in a reciprocating manner, the pushing assembly intermittently leads the temperature control medium in the temperature control groove 1 into the medium flow channel 9 so as to realize the replacement of the temperature control medium in the medium flow channel 9.
In the embodiment of the invention, n-ethanol is placed in the reaction tank 10, then the reaction tank 10 is inserted in the insertion groove 17 and fixed, at the moment, the guide air inlet valve 20 is communicated with the through hole 12, the stirring component is connected with the reciprocating component, the arranged motor 11 drives the stirring component to rotate when working, so that the reciprocating component is matched to move to drive the receiving groove 4 and the reaction tank 10 to integrally move in a reciprocating manner, when the receiving groove 4 moves in the reciprocating manner, the pushing component intermittently leads the temperature control medium in the temperature control groove 1 into the medium flow channel 9, so as to realize the replacement of the temperature control medium in the medium flow channel 9, thereby ensuring the temperature control effect on the reaction tank 10, and the practicability is strong, the reaction tank 10 is detachably connected with the receiving groove 4, and the unloading is convenient.
In the embodiment of the present invention, it should be noted that when phosgene needs to be introduced, phosgene enters the gas guide cavity 8 through the gas inlet pipe arranged on the receiving groove 4, and phosgene in the gas guide cavity 8 enters the reaction tank 10 through the through hole 12 and the one-way gas inlet valve 20 to perform a chemical reaction.
In another embodiment of the present invention, the reaction tank 10 is fixed to the receiving tank 4 by bolts.
In the embodiment of the present invention, the reaction tank 10 may be fixed to the receiving tank 4 in a snap-fit manner, as long as the fixing requirement for convenient detachment is met, which is not specifically limited in this application.
As another embodiment of the present invention, the stirring assembly includes a driving shaft 13 rotatably installed in the reaction tank 10, one end of the driving shaft 13 is fixedly connected to an output shaft of the motor 11, the other end of the driving shaft 13 penetrates through the reaction tank 10 and is connected to the reciprocating assembly through a sliding limiting assembly, and a helical blade 15 is fixed to the driving shaft 13 located in the reaction tank 10.
In the embodiment of the invention, the single machine 11 drives the driving shaft 13 to rotate when working, and the driving shaft 13 drives the helical blade 15 to rotate when rotating, so that the stirring of the n-ethanol is realized, and the reaction effect of the n-ethanol and the phosgene is improved.
As another embodiment of the present invention, an annular cavity 14 is further fixed on the inner side of the reaction tank 10, the annular cavity 14 is fixed to the bottom of the reaction tank 10, a plurality of communication holes 16 are provided on the annular cavity 14 at a position close to the bottom of the reaction tank 10, and a gap is reserved between the annular cavity 14 and the top of the inner side of the reaction tank 10.
In the embodiment of the invention, through the added annular cavity 14, when the helical blades 15 rotate, the n-hexanol at the bottom of the reaction tank 10 is lifted upwards, and when the n-hexanol is lifted to the top of the annular cavity 14, the n-ethanol overflows and falls under the action of gravity, so that the contact area of the n-ethanol and phosgene is increased, and the reaction effect is improved.
In another embodiment of the present invention, the reciprocating assembly includes a rack frame 3 fixed at the bottom of the temperature-controlled tank 1 and an incomplete gear 18 movably mounted in the rack frame 3, a toothed portion of the incomplete gear 18 is intermittently engaged with two strip-shaped teeth on the inner side of the rack frame 3, the incomplete gear 18 is rotatably connected to the receiving tank 4 through a connecting sleeve 19 fixedly connected thereto, and the connecting sleeve 19 is connected to the driving shaft 13 through a sliding limiting assembly.
In the embodiment of the invention, when the driving shaft 13 rotates, the sliding limiting assembly drives the connecting sleeve 19 to rotate, the connecting sleeve 19 drives the incomplete gear 18 to rotate, when the incomplete gear 18 rotates, the incomplete gear 18 moves under the action of two strip-shaped teeth on the rack frame 3, and when the incomplete gear 18 moves, the receiving groove 4 and the reaction tank 10 are driven to move in a reciprocating manner, so that the normal ethanol in the reaction tank 10 shakes, and the reaction efficiency of phosgene and the normal ethanol is improved.
As another embodiment of the present invention, the sliding limiting component includes at least one strip-shaped limiting block fixed on the driving shaft 13, and the strip-shaped limiting block is in sliding fit with a strip-shaped limiting groove disposed on the inner wall of the connecting sleeve 19.
In the embodiment of the invention, the strip-shaped limiting block and the strip-shaped limiting groove are in sliding fit, so that the driving shaft 13 is driven to rotate when rotating, and meanwhile, the driving shaft 13 is conveniently separated from the connecting sleeve 19 when the reaction tank 10 is taken down.
As another embodiment of the invention, the pushing assembly comprises a piston cylinder 5 fixed on the inner wall of the temperature control groove 1, a piston 7 is arranged on the inner side of the piston cylinder 5, the piston 7 is fixedly connected with a hard conduit 6 fixed on the bearing groove 4, and the hard conduit 6 is communicated with the inner side of the medium flow channel 9;
the piston cylinder 5 is provided with a liquid inlet, and the liquid inlet and the hard conduit 6 are both internally provided with one-way valves.
In the embodiment of the invention, when the bearing groove 4 moves, the hard guide pipe 6 is driven to move along with the bearing groove, the hard guide pipe 6 drives the piston 7 to move in the piston cylinder 5, so that the temperature control medium in the temperature control groove 1 is pumped into the medium channel 9, the original temperature control medium in the medium channel 9 flows into the temperature control groove 1 again, the temperature control medium in the medium channel 9 is replaced intermittently, the temperature control effect is ensured, and the practicability is high.
As another embodiment of the present invention, the elastic expansion and contraction component 2 includes a fixing rod and a fixing sleeve respectively fixed on the temperature control tank 1 and the receiving tank 4, and the fixing rod is inserted into the fixing sleeve towards one end of the fixing sleeve and is connected to the inner wall of the fixing sleeve through a spring.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The n-hexyl chloroformate production process equipment is characterized by comprising a temperature control groove (1), wherein a bearing groove (4) is movably arranged on the inner side of the temperature control groove (1), the two sides of the bearing groove (4) are connected with the inner wall of the temperature control groove (1) through elastic telescopic components (2), an inserting groove (17) is arranged on the inner side of the bearing groove (4), a reaction tank (10) is inserted into the inner side of the inserting groove (17), a stirring component is arranged on the inner side of the reaction tank (10), one end of the stirring component penetrates through the upper side wall of the reaction tank (10) and is fixedly connected with an output shaft of a motor (11) arranged on the reaction tank (10), the other end of the stirring component penetrates through the bottom of the reaction tank (10) and is connected with a reciprocating temperature control component connected with the bearing groove (4) and the temperature control groove (1) through a sliding limiting component, an air guide cavity (8) is arranged on the inner wall of the bearing groove (4), a through hole (12) is formed in the inner wall of the air guide cavity (8), a one-way air inlet valve (20) matched with the through hole (12) is arranged on the reaction tank (10), and when the stirring assembly is connected with the reciprocating assembly, the through hole (12) is communicated with the one-way air inlet valve (20);
the inner wall of the air guide cavity (8) is further provided with a medium flow channel (9), the medium flow channel (9) is communicated with a pushing assembly installed in the temperature control groove (1), and when the receiving groove (4) moves in a reciprocating mode, the pushing assembly intermittently enables the temperature control medium in the temperature control groove (1) to be introduced into the medium flow channel (9) so as to achieve temperature control medium replacement in the medium flow channel (9).
2. The n-hexyl chloroformate production process equipment according to claim 1, characterized in that the reaction tank (10) is fixed with the receiving groove (4) through bolts.
3. The n-hexyl chloroformate production process equipment according to claim 1, characterized in that the stirring assembly comprises a driving shaft (13) rotatably installed in the reaction tank (10), one end of the driving shaft (13) is fixedly connected with an output shaft of the motor (11), the other end of the driving shaft penetrates through the reaction tank (10) and is connected with the reciprocating assembly through a sliding limiting assembly, and a helical blade (15) is fixed on the driving shaft (13) located in the reaction tank (10).
4. The n-hexyl chloroformate production process equipment according to claim 3, characterized in that an annular chamber (14) is further fixed on the inner side of the reaction tank (10), the annular chamber (14) is fixed with the bottom of the reaction tank (10), a plurality of communication holes (16) are arranged on the annular chamber (14) at positions close to the bottom of the reaction tank (10), and a gap is reserved between the annular chamber (14) and the top of the inner side of the reaction tank (10).
5. The n-hexyl chloroformate production process equipment according to claim 3, characterized in that the reciprocating assembly comprises a rack frame (3) fixed at the bottom of the temperature control groove (1) and an incomplete gear (18) movably installed in the rack frame (3), a toothed part on the incomplete gear (18) is in intermittent meshing with two strip-shaped teeth on the inner side of the rack frame (3), the incomplete gear (18) is rotatably connected with the receiving groove (4) through a connecting sleeve (19) fixedly connected with the incomplete gear, and the connecting sleeve (19) is connected with the driving shaft (13) through a sliding limiting assembly.
6. The n-hexyl chloroformate production process equipment according to claim 5, characterized in that the sliding limiting assembly comprises at least one strip-shaped limiting block fixed on the driving shaft (13), and the strip-shaped limiting block is in sliding fit with a strip-shaped limiting groove arranged on the inner wall of the connecting sleeve (19).
7. The n-hexyl chloroformate production process equipment according to claim 1, characterized in that the pushing assembly comprises a piston cylinder (5) fixed on the inner wall of the temperature control groove (1), a piston (7) is arranged on the inner side of the piston cylinder (5), the piston (7) is fixedly connected with a hard conduit (6) fixed on the bearing groove (4), and the hard conduit (6) is communicated with the inner side of the medium flow channel (9);
the piston cylinder (5) is provided with a liquid inlet, and the liquid inlet and the hard conduit (6) are both internally provided with one-way valves.
8. The n-hexyl chloroformate production process equipment according to claim 1, characterized in that the elastic expansion assembly (2) comprises a fixing rod and a fixing sleeve fixed on the temperature control groove (1) and the receiving groove (4), respectively, wherein one end of the fixing rod facing the fixing sleeve is inserted into the fixing sleeve and is connected with the inner wall of the fixing sleeve through a spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011631650.8A CN112755952A (en) | 2020-12-30 | 2020-12-30 | Process equipment for producing n-hexyl chloroformate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011631650.8A CN112755952A (en) | 2020-12-30 | 2020-12-30 | Process equipment for producing n-hexyl chloroformate |
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| Publication Number | Publication Date |
|---|---|
| CN112755952A true CN112755952A (en) | 2021-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011631650.8A Pending CN112755952A (en) | 2020-12-30 | 2020-12-30 | Process equipment for producing n-hexyl chloroformate |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205340651U (en) * | 2016-01-12 | 2016-06-29 | 什邡市太丰新型阻燃剂有限责任公司 | A cooling agitated vessel for fire retardant production |
| CN107873681A (en) * | 2017-11-09 | 2018-04-06 | 深圳市晟祥知识产权有限公司 | One kind sprays uniform stirring-type pesticide spray truck |
| CN108751681A (en) * | 2018-06-22 | 2018-11-06 | 无锡南理工科技发展有限公司 | A kind of chemical toughening furnace chemicals environmental protection retracting device |
| CN110370072A (en) * | 2019-07-15 | 2019-10-25 | 殷芮 | A kind of exclusion device of industrial equipment coolant liquid |
| CN111282509A (en) * | 2020-03-09 | 2020-06-16 | 胡少堂 | Glue is with preventing agitating unit that solidifies |
| CN211268295U (en) * | 2019-12-05 | 2020-08-18 | 吴国民 | Pesticide spraying equipment for plant protection |
-
2020
- 2020-12-30 CN CN202011631650.8A patent/CN112755952A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205340651U (en) * | 2016-01-12 | 2016-06-29 | 什邡市太丰新型阻燃剂有限责任公司 | A cooling agitated vessel for fire retardant production |
| CN107873681A (en) * | 2017-11-09 | 2018-04-06 | 深圳市晟祥知识产权有限公司 | One kind sprays uniform stirring-type pesticide spray truck |
| CN108751681A (en) * | 2018-06-22 | 2018-11-06 | 无锡南理工科技发展有限公司 | A kind of chemical toughening furnace chemicals environmental protection retracting device |
| CN110370072A (en) * | 2019-07-15 | 2019-10-25 | 殷芮 | A kind of exclusion device of industrial equipment coolant liquid |
| CN211268295U (en) * | 2019-12-05 | 2020-08-18 | 吴国民 | Pesticide spraying equipment for plant protection |
| CN111282509A (en) * | 2020-03-09 | 2020-06-16 | 胡少堂 | Glue is with preventing agitating unit that solidifies |
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Application publication date: 20210507 |