CN110976120A - Centrifugal paint nozzle for accelerating atomization by reverse airflow - Google Patents
Centrifugal paint nozzle for accelerating atomization by reverse airflow Download PDFInfo
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- CN110976120A CN110976120A CN201911256254.9A CN201911256254A CN110976120A CN 110976120 A CN110976120 A CN 110976120A CN 201911256254 A CN201911256254 A CN 201911256254A CN 110976120 A CN110976120 A CN 110976120A
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- chamber
- reverse
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- duct
- cap
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/10—Spray pistols; Apparatus for discharge producing a swirling discharge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
- B05B7/2489—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device
- B05B7/2491—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device characterised by the means for producing or supplying the atomising fluid, e.g. air hoses, air pumps, gas containers, compressors, fans, ventilators, their drives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
- B05B7/26—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device
- B05B7/262—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device a liquid and a gas being brought together before entering the discharge device
Abstract
The invention relates to a centrifugal paint nozzle for accelerating atomization by reverse airflow, which comprises a feeding cavity, a flow guide cavity, a material storage cavity, a cyclone chamber, a flow guide pipe and a reverse airflow cap, wherein the flow guide cavity is fixedly connected to the bottom of the feeding cavity, the material storage cavity is fixedly connected to the bottom of the flow guide cavity, the cyclone chamber is fixedly connected to the middle part of the bottom end of the material storage cavity, the flow guide pipe is erected between the flow guide cavity and the material storage cavity, the reverse airflow cap is erected on the flow guide pipe, the reverse airflow cap is positioned at a discharge port of the cyclone chamber, and gas is introduced into the flow guide pipe and reversely flows into the cyclone chamber from the reverse airflow cap.
Description
Technical Field
The invention relates to the technical field of paint spraying, in particular to a centrifugal paint nozzle for accelerating atomization by reverse airflow.
Background
With the continuous development of aviation technology, the application of the composite material becomes wider, which puts higher requirements on the paint spraying process, and the quality of the spraying quality is directly related to the service life and the performance of the composite material; the quality of the spray is largely determined by the performance of the nozzle, so the design and optimization of the nozzle is one of the key technologies in the field of aviation.
The traditional aviation coating nozzle mainly comprises a pressure atomizing nozzle, an air atomizing nozzle and the like, wherein the coating is atomized into fine particles by using high-pressure coating or high-pressure air, and then the fine particles are sprayed, so that the high requirement on the pressure of the coating and the air is met, and certain potential safety hazard is brought; meanwhile, the high pressure is arranged at the outlet of the nozzle, so that paint is inevitably sprayed in the spraying process, and the paint is wasted and sprayed unevenly; in addition, the spray cone angle generally cannot be changed after the nozzle is selected, which greatly affects the spray efficiency and application scenario.
Accordingly, in response to the above deficiencies, it would be desirable to provide a centrifugal paint nozzle with reverse airflow to accelerate atomization.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problems that high pressure is needed and splashing can occur during spraying.
(II) technical scheme
In order to solve the technical problem, the invention provides a centrifugal paint nozzle for accelerating atomization by reverse airflow, which comprises a feeding cavity, a flow guide cavity, a storage cavity, a cyclone chamber, a flow guide pipe and a reverse airflow cap, wherein the flow guide cavity is fixedly connected to the bottom of the feeding cavity, the storage cavity is fixedly connected to the bottom of the flow guide cavity, the cyclone chamber is fixedly connected to the middle part of the bottom end of the storage cavity, the flow guide pipe is erected between the flow guide cavity and the storage cavity, the reverse airflow cap is erected on the flow guide pipe, the reverse airflow cap is positioned at a discharge port of the cyclone chamber, and gas is introduced into the flow guide pipe and reversely flows into the cyclone chamber from the.
By adopting the technical scheme, the coating enters the nozzle through the feeding cavity, enters the storage cavity after being rectified by the flow guide cavity, and then enters the cyclone chamber through the feeding hole of the cyclone chamber to form coating cyclone; simultaneously with gaseous leading-in air duct, under reverse air current cap's effect, form reverse air current, reverse air current and coating whirl are at nozzle outlet interact, not only can accelerate the atomizing of coating, can also promote the atomizing homogeneity of coating.
As a further explanation of the invention, it is preferred that the air outlet of the reverse airflow cap extends outside the cyclone chamber.
By adopting the technical scheme, the atomizing efficiency can be improved while the coating can be sprayed out of the nozzle.
As a further explanation of the present invention, it is preferable that the ratio of the length of the reverse airflow cap protruding out of the swirling chamber to the diameter of the reverse airflow cap is 0.4 to 0.6.
By adopting the technical scheme, the coating can be prevented from contacting with the reverse airflow cap, and the maximum effect of accelerating atomization of the reverse airflow is ensured.
As a further explanation of the present invention, preferably, a spiral feed inlet is disposed on an outer wall of the cyclone chamber, one end of the feed inlet is communicated with the storage cavity, and the other end of the feed inlet is communicated with the cyclone chamber.
By adopting the technical scheme, the layered rotational flow of the coating in the rotational flow chamber can be realized, and the atomization uniformity of the coating is promoted.
As a further explanation of the invention, preferably, the swirl chamber is distributed with a plurality of feed inlets at intervals along the axial direction, the ratio of the caliber of the feed inlets to the caliber of the swirl chamber is 0.001-0.003, and the ratio of the height of the swirl chamber to the caliber of the swirl chamber is 0.7-0.95.
Through adopting above-mentioned technical scheme, feed inlet circumference is evenly arranged, has guaranteed the homogeneity of the interior coating flow field of swirl chamber, and the aperture ratio has guaranteed that coating can get into the swirl chamber smoothly to have certain circumference speed, highly form rotatory liquid film in the swirl chamber with aperture ratio assurance simultaneously, and then do benefit to the breakage of coating.
As a further explanation of the present invention, preferably, the air duct includes a transverse duct and a longitudinal duct, the axial direction of the transverse duct is perpendicular to the axial direction of the diversion chamber, the transverse duct penetrates through the junction between the diversion chamber and the storage chamber, one end of the longitudinal duct is fixedly connected to the transverse duct, the other end of the longitudinal duct is fixedly connected to the reverse airflow cap, and the axial line of the longitudinal duct coincides with the axial line of the diversion chamber.
Through adopting above-mentioned technical scheme, adopt the effective increase gas flow and the velocity of flow of two intake pipes, the small-bore export of cooperation reverse air current cap makes during gaseous ability spouts the more deep space of swirl chamber, and then the whirl of cooperation coating makes the coating atomize more fast.
As a further explanation of the invention, the hydraulic pressure in the feeding cavity is preferably 0.5-10 MPa, and the air pressure in the air guide pipe is preferably 0.2-0.5 MPa.
By adopting the technical scheme, the coating can realize atomization under lower pressure and can be suitable for coatings with different viscosities; and the gas pressure range can ensure that the momentum of the reverse airflow and the coating momentum are in a proper range, so that the sputtering of the coating is avoided.
As a further explanation of the present invention, it is preferable that the ratio of the total length of the nozzle to the diameter of the outlet of the swirling chamber is 1.1 to 1.5, the ratio of the diameter of the outlet of the swirling chamber to the diameter of the swirling chamber is 0.005 to 0.01, and the ratio of the diameter of the reverse flow cap to the diameter of the outlet of the swirling chamber is 0.5 to 0.75.
By adopting the technical scheme, the ratio of the total length of the nozzle to the outer diameter of the discharge hole of the cyclone chamber is set to ensure the proper atomization granularity and flow range of the coating; the proper size of the discharge hole is set to ensure that the coating can be smoothly sprayed out from the nozzle, so that the coating is prevented from being accumulated in the cyclone chamber; and a proper outlet ratio is set, so that the reverse airflow can impact the paint spray from the inner part of the spray cone angle, and the matching of the airflow flow and the paint flow is ensured.
As a further explanation of the present invention, it is preferable that the ratio of the diameter of the transverse pipe to the diameter of the longitudinal pipe is 0.75 to 1.
By adopting the technical scheme, the diameter of the longitudinal pipe orifice is slightly smaller than that of the transverse pipe orifice, so that the airflow is accelerated.
As a further explanation of the present invention, it is preferable that the ratio of the diameter of the longitudinal pipe to the diameter of the reverse airflow cap is 0.8 to 0.9.
By adopting the technical scheme, the speed of the reverse airflow is convenient to control, and meanwhile, the rectification function of the reverse airflow cap is facilitated to be enhanced.
(III) advantageous effects
The technical scheme of the invention has the following advantages:
1. the invention adopts the principle of accelerating atomization by reverse airflow, can realize the atomization of the coating under lower pressure, and increases the safety and reliability of the spraying equipment;
2. the centrifugal rotational flow is adopted to atomize the coating, so that the uniformity of coating atomization is improved, and the spraying quality is improved;
3. the pressure of the reverse airflow can be controlled, so that the spray cone angle can be changed, and the applicability of the nozzle is improved.
Drawings
FIG. 1 is an effect diagram of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
fig. 3 is a cross-sectional view a-a of fig. 2.
In the figure: 1. a feed cavity; 2. a flow guide cavity; 3. a material storage cavity; 4. a swirl chamber; 41. a feed inlet; 5. an air duct; 51. a transverse tube; 52. a longitudinal tube; 53. a first air inlet; 54. a second air inlet; 6. a reverse airflow cap.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The utility model provides a reverse air current is atomizing centrifugal paint nozzle with higher speed, combines figure 1, figure 2, including feeding chamber 1, water conservancy diversion chamber 2, storage chamber 3, swirl chamber 4, honeycomb duct 5 and reverse air current cap 6, water conservancy diversion chamber 1 links firmly in feeding chamber 2 bottoms, and storage chamber 3 links firmly in water conservancy diversion chamber 2 bottoms, and swirl chamber 4 links firmly in 3 bottom middle parts of storage chamber, and honeycomb duct 5 erects between water conservancy diversion chamber 2 and storage chamber 3, and reverse air current cap 6 erects on honeycomb duct 5.
With reference to fig. 1 and 2, the paint spraying device comprises a feeding cavity 1, a flow guide cavity 2 and a storage cavity 3 which are all integrally formed cylindrical pipe bodies, wherein cylindrical inner cavities are formed in the feeding cavity 1 and the storage cavity 3, the caliber of the storage cavity 3 is larger than that of the feeding cavity 1, a horn-shaped inner cavity is formed in the flow guide cavity 2, the flow guide cavity 2 is communicated with the feeding cavity 1 and the storage cavity 3, and the outer wall of the inner cavity of the flow guide cavity 2 is arc-shaped, so that paint can smoothly flow into the storage cavity 3; referring to fig. 3, the cyclone chamber 4 is an inverted trapezoidal housing, and the bottom of the cyclone chamber is a discharge port, a plurality of spiral feed inlets 41 are axially spaced on the outer wall of the cyclone chamber 4, one end of each feed inlet 41 is communicated with the storage cavity 3, and the other end of each feed inlet 41 is communicated with the cyclone chamber 4; the air duct 5 comprises a transverse duct 51 and a longitudinal duct 52, the axial direction of the transverse duct 51 is vertical to the axial direction of the diversion cavity 2, the transverse duct 51 penetrates through the joint of the diversion cavity 2 and the material storage cavity 3, and two ports of the transverse duct 51 are respectively a first air inlet 53 and a second air inlet 54; one end of the longitudinal pipe 52 is fixedly connected with the transverse pipe 51, the other end of the longitudinal pipe 52 is fixedly connected with the reverse airflow cap 6, and the axis of the longitudinal pipe 52 is superposed with the axis of the flow guide cavity 2; a hole with an inclined upward opening is formed in the reverse airflow cap 6, and an air outlet of the reverse airflow cap 6 extends out of the cyclone chamber 4, so that the coating can be sprayed out of the nozzle, and the atomization efficiency is improved; the draft tube 5 is filled with gas and reversely flows into the cyclone chamber 4 from the reverse airflow cap 6.
With reference to fig. 2 and 3, the hydraulic pressure in the feeding cavity 1 is 0.5-10 MPa, and the air pressure in the air duct 5 is 0.2-0.5 MPa, so that the coating can be atomized under lower pressure, and the coating can be suitable for coatings with different viscosities; the gas pressure range can ensure that the momentum of the reverse airflow and the coating momentum are in a proper range, so that the sputtering of the coating is avoided; the ratio of the caliber of the feed inlet 41 to the caliber of the swirl chamber 4 is 0.001-0.003, the feed inlet 41 is uniformly arranged in the circumferential direction, the coating can perform layered swirl in the swirl chamber 4, the atomization uniformity of the coating is promoted, the reasonable caliber ratio ensures that the coating has certain circumferential speed and smoothly enters the swirl chamber 4, the ratio of the height of the swirl chamber 4 to the caliber of the swirl chamber 4 is 0.7-0.95, and a rotating liquid film can be formed in the swirl chamber 4, so that the coating can be crushed; the ratio of the length of the reverse airflow cap 6 extending out of the cyclone chamber 4 to the diameter of the reverse airflow cap 6 is 0.4-0.6, so that the coating can be prevented from contacting the reverse airflow cap 6, and the maximum effect of reverse airflow accelerated atomization is ensured;
with reference to fig. 2 and 3, the ratio of the total length of the nozzle to the aperture of the discharge hole of the swirl chamber 4 is 1.1-1.5, so as to ensure that the coating has proper atomization granularity and flow range; the volume Q of the coating is required to ensure that the coating can be smoothly sprayed from the nozzle and cannot be accumulated in the cyclone chamber 41Flow rate Q of the nozzle or less2And at the same time,
Q2＝ρAV；
wherein the content of the first and second substances,
L2the height of the swirl chamber 4;
rho is the density of the coating;
v is the flow rate of the coating;
due to the need of Q2≥Q1The diameter of the discharge port 41 of the cyclone chamber 4 can be obtained by calculation
With 4-caliber of cyclone chamber
The ratio of the ratio is 0.005 to 0.01.
With reference to fig. 2 and 3, the ratio of the caliber of the transverse pipe 51 to the caliber of the longitudinal pipe 52 is 0.75-1, the caliber of the longitudinal pipe 52 is slightly smaller than the caliber of the transverse pipe 51, so that the airflow is accelerated, the ratio of the caliber of the longitudinal pipe 52 to the caliber of the reverse airflow cap 6 is 0.8-0.9, the speed of the reverse airflow is controlled conveniently, and meanwhile, the rectification function of the reverse airflow cap 6 is enhanced; the ratio of the caliber of the reverse airflow cap 6 to the caliber of the discharge hole 41 of the cyclone chamber 4 is 0.5-0.75, so that the reverse airflow can impact paint spray from the inside of a spray cone angle, and the matching of the airflow and the paint flow is ensured.
Referring to fig. 2 and 3, the coating enters the nozzle through the feeding cavity 1, enters the storage cavity 3 after being rectified by the flow guide cavity 2, and then enters the cyclone chamber 4 through the feeding hole 41 of the cyclone chamber 4 to form a coating cyclone; simultaneously with gaseous leading-in air duct 5, under reverse air current cap 6's effect, form reverse air current, reverse air current and coating whirl are at nozzle export interact, not only can accelerate the atomizing of coating, can also promote the atomizing homogeneity of coating to adopt effective increase gas flow and the velocity of flow of two intake pipes, the small-bore export of reverse air current cap is supported, make gas can spout into the more deep space of swirl chamber, and then the whirl of cooperation coating makes the coating atomize more fast
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A reverse air flow accelerated atomization centrifugal paint nozzle is characterized in that: including feed cavity (1), water conservancy diversion chamber (2), storage cavity (3), swirl chamber (4), honeycomb duct (5) and reverse air current cap (6), water conservancy diversion chamber (2) link firmly in feed cavity (1) bottom, storage cavity (3) link firmly in water conservancy diversion chamber (2) bottom, swirl chamber (4) link firmly in storage cavity (3) bottom middle part, honeycomb duct (5) are erect between water conservancy diversion chamber (2) and storage cavity (3), reverse air current cap (6) are erect on honeycomb duct (5), reverse air current cap (6) are located the discharge gate department of swirl chamber (4), let in gas in honeycomb duct (5) and locate reverse inflow swirl chamber (4) from reverse air current cap (6).
2. A centrifugal paint nozzle for accelerated atomization of reverse air flow in accordance with claim 1 wherein: the air outlet of the reverse airflow cap (6) extends out of the cyclone chamber (4).
3. A centrifugal paint nozzle for accelerated atomization of reverse air flow as set forth in claim 2 wherein: the ratio of the length of the reverse airflow cap (6) extending out of the cyclone chamber (4) to the diameter of the reverse airflow cap (6) is 0.4-0.6.
4. A centrifugal paint nozzle for accelerated atomization of claim 3 in which: spiral feed inlet (41) are formed in the outer wall of the cyclone chamber (4), one end of the feed inlet (41) is communicated with the material storage cavity (3), and the other end of the feed inlet (41) is communicated with the cyclone chamber (4).
5. A centrifugal paint nozzle for accelerated atomization of claim 4 in which: the cyclone chamber (4) is provided with a plurality of feeding holes (41) at intervals along the axial direction, the ratio of the caliber of the feeding holes (41) to the caliber of the cyclone chamber (4) is 0.001-0.003, and the ratio of the height of the cyclone chamber (4) to the caliber of the cyclone chamber (4) is 0.7-0.95.
6. A centrifugal paint nozzle for accelerated atomization of reverse air flow in accordance with claim 1 wherein: the air duct (5) comprises a transverse duct (51) and a longitudinal duct (52), the axis direction of the transverse duct (51) is perpendicular to the axis direction of the diversion cavity (2), the transverse duct (51) penetrates through the connection part of the diversion cavity (2) and the material storage cavity (3), one end of the longitudinal duct (52) is fixedly connected with the transverse duct (51), the other end of the longitudinal duct (52) is fixedly connected with the reverse airflow cap (6), and the axis of the longitudinal duct (52) is overlapped with the axis of the diversion cavity (2).
7. A centrifugal paint nozzle for accelerated atomization of reverse air flow in accordance with claim 1 wherein: the hydraulic pressure in the feeding cavity (1) is 0.5-10 MPa, and the air pressure in the air guide pipe (5) is 0.2-0.5 MPa.
8. A centrifugal paint nozzle for accelerated atomization of claim 7 in which: the ratio of the total length of the nozzle to the aperture of the discharge port of the swirl chamber (4) is 1.1-1.5, the ratio of the aperture of the discharge port of the swirl chamber (4) to the aperture of the swirl chamber (4) is 0.005-0.01, and the ratio of the aperture of the reverse airflow cap (6) to the aperture of the discharge port of the swirl chamber (4) is 0.5-0.75.
9. A centrifugal paint nozzle for accelerated atomization of claim 6 in which: the ratio of the diameter of the transverse pipe (51) to the diameter of the longitudinal pipe (52) is 0.75 to 1.
10. A centrifugal paint nozzle for accelerated atomization of claim 9 in which: the ratio of the diameter of the longitudinal pipe (52) to the diameter of the reverse airflow cap (6) is 0.8 to 0.9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911256254.9A CN110976120B (en) | 2019-12-10 | 2019-12-10 | Centrifugal paint nozzle for accelerating atomization by reverse airflow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911256254.9A CN110976120B (en) | 2019-12-10 | 2019-12-10 | Centrifugal paint nozzle for accelerating atomization by reverse airflow |
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| CN110976120A true CN110976120A (en) | 2020-04-10 |
| CN110976120B CN110976120B (en) | 2021-03-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113412914A (en) * | 2021-06-08 | 2021-09-21 | 瑞安市绿洲食品有限公司 | Production process of dried beef |
| CN114405309A (en) * | 2022-02-22 | 2022-04-29 | 安徽工业大学 | Gas ejector device |
| CN115193610A (en) * | 2022-07-14 | 2022-10-18 | 国家林业和草原局华东调查规划院 | Trunk lime spraying device for forestry pest control |
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| JPH0422451A (en) * | 1990-05-15 | 1992-01-27 | Honda Motor Co Ltd | Rotary atomizing type coating apparatus |
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| CN104989332A (en) * | 2015-06-17 | 2015-10-21 | 成都高普石油工程技术有限公司 | Pressure jetting mechanism for down-hole gas production |
| CN207076573U (en) * | 2016-11-30 | 2018-03-09 | 福建天广消防有限公司 | A kind of pressure type foam spray nozzle |
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2019
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| US4526322A (en) * | 1982-03-26 | 1985-07-02 | Voorheis Industries, Inc. | Flow-reversing nozzle assembly |
| JPH0422451A (en) * | 1990-05-15 | 1992-01-27 | Honda Motor Co Ltd | Rotary atomizing type coating apparatus |
| CN202021105U (en) * | 2011-03-31 | 2011-11-02 | 江苏宇达电站辅机阀门制造有限公司 | Tangential cyclone large-spray angle nozzle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113412914A (en) * | 2021-06-08 | 2021-09-21 | 瑞安市绿洲食品有限公司 | Production process of dried beef |
| CN114405309A (en) * | 2022-02-22 | 2022-04-29 | 安徽工业大学 | Gas ejector device |
| CN115193610A (en) * | 2022-07-14 | 2022-10-18 | 国家林业和草原局华东调查规划院 | Trunk lime spraying device for forestry pest control |
| CN115193610B (en) * | 2022-07-14 | 2023-10-03 | 国家林业和草原局华东调查规划院 | Forestry is trunk lime spraying device for pest control |
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| CN110976120B (en) | 2021-03-16 |
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